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TOSHIBA 
Outdoor Units 
AR-F81HTM8 
MAR-F10O1HTM8 
Multi-Controller | 
RBM-Y1031FE 

RBM-Y 104 1FE 





TABLE OF CONTENTS 


. MULTI AIR CONDITIONER SYSTEMS AND 





THEIR BASIC COMPONENTS 12 

1-1. Indoor Remote Controllers... seve 3 

1-2, OUtdoOor Unit .....sscccsscscssscnrssseccesssorosveccsesscsesosencscceases 3 

1-3. Mullti-controllers ......csccccsssssssscsnscsncescsserssssacenssecorsesans 3 

14. Indoor Uniits......cscssccccssscssscssscvencssscsnsesccncnsscessevenssenszee O 
2. CONTROL SYSTEM. ......ccccscossssscscesnsscccserecceseseee 3 
3. REFRIGERANT CYCLE DIAGRAM .......ssecsssse- 5 
4, COMBINATION OF INDOOR UNITS AND 


OUTDOOR UNITS. ........ccssssssrssssconsescensccerecesenccens 6 

4-1. Basic Criteria for Combinations... ee «| 

4-2. Procedure for Checking the Combination... net i 

4-3. Examples of Connection Check ....ccssssssssscsnersssessece 8 

5. SPECIFICATIONS OF OUTDOOR UNIT.........0. 9 
§-1. Explanation of 

Electric Characteristics Calculation ........sscsserssse 10 

6. EXTERNAL VIEW......cccsscssssccsssorccrsnsccesccsesesees 11 

G1. Outdoor Uniit...ccccrccsoverscossssesssseresssssversrorsnseascseccessecsase a] 

6-2. Mullth-Controller....sccocenssccscesssscesenssssresveereesscsanesnessecsese 12 

GB. Header....ccrocsssecssornsrnvonenessecsnssecorserseresusessneasencsserssesese 13 

7. WIRING DIAGRAM. .....ccssscsssscsssscscscenscccssnacosees 14 


7-1. Outdoor Unit (MAR-F81HTM8, MAR-F101HTM8).... 14 
7-2. Multl-controller (RBM-Y1031FE, Y1041FE)............ 16 


8. ELECTRICAL SPECIFICATIONS ......... skatevuseaes 18 
8-1. Specifications of Refrigerant Cycle Parts............. - 18 
8-2. Specifications of inverter Assembly Parts ............. 19 
8-3. Specifications of Multi-controller Parts .........ss0000 20 
9. Cooling/Heating Capacity Characteristics ...21 
Q-1. Range of Operation.........ssssecccsesscveeserscssccsescnssnsessce 21 
9-2. Cooling Capacity Calculation ......csseccsssssrsssssesesees 22 
9-3. Heating Capacity Calculation ........ccsssssssesssenssesssese 23 
10. AIR TIGHTNESS TEST, AIR PURGING WITH A 
VACUUM PUMP AND CHARGING OF 
ADDITIONAL REFRIGERANT ...........ccscsescoseeses 25 
10-1. Air Tightness TeSt.....ccsscccccssssnssessssscrsccorsossnnsenseeseses 25 
10-2. Air Purging with a Vacuum Pump ........csccscesssssseeee 26 
10-3. Additional Refrigerant Charging and 
Amount Of Addition.........ccssssssesverccesnsnssevorsssesnsoreces 27 
11. PIPING LENGTH AND CHARGED 
REFRIGERANT AMOUNT. ........cccsscsssssnsssccveesoes 28 
11-1. Main Branch (One Multi-Controller) ............c.csssess 28 
11-2. Sub Branch (Two Multi-Controliers).........cccccesssees 29 
12, DESCRIPTION OF OPERATION. .......ccscsssvesees 30 
12-1. Simultaneous Cooling/ 
Heating Operation Control Outline........ccresscerseee 30 
12-2. Functions and Operations of Solenoid Valves....... 31 
13. OPERATIONS OF EACH SENSOR .........ccsseee 33 
13-1. Multi-Controtler .......ccccssssossssssseveresessvsesasnasesesseeereres . 33 
13-2, Outdoor Unit.......c..ssscesecsssssessesesecssescceresceccscsssonserssse 34 
14, COOLING/HEATING AUTOMATIC REMOTE 
CONTROLLER ......csscsesssscssescssscceseesecseccssecnsecese 35 
14-1, Cooling/Heating Automatic 
Change-Over Operation...........c.ccecnssssrseseeneceseessese 35 
15. IMPORTANT MATTERS TO BE CHECKED 


BEFORE TEST RUN AND SERVICING 
15-1. Registered Indoor Unit Code Numbers............ss000 


15-2. Connections of Refrigerant Piping and 
Control Wires between Indoor Units and 
Mullti-Controller ......sscccssscsssancsscsonsssssssnscenscessovenssennees 37 
15-3. Connections of Controi Wires between Units......... 37 





16. 


17. 
18. 
19 
20. 


21 


22. 


23. 


24. 


25. 


TEST RUN eos eck iceisicaucen 38 
16-1. Test Run Procedure... 3 
16-2. Check before Test Rumn.......cccccccssssssssessceresreseservase 
16-3. Test Run Check... Sdocedessepnaseseaceess 

16-4. Guidelines... ae eave dassbavivcessocisonnsensaasascl I 


SERVICING PROCEDURES ... dasitececeass eerie ed 
CHECK CODE DISPLAY SYSTEM CHART ....45 
IDENTIFICATION PROCEDURES ......c..ccccoveses 46 
JUDGMENT OF MALFUNCTIONS WITH THE 
REMOTE CONTROLLER INDICATION .......00 49 
20-1. Malfunction Check Display Operation ......csseseccscses 49 
20-2. How to Read the Malfunction Check 

Monitor Display.... cascessesroeereczoeee DO 
20-3. The Check Code and the ‘Judgment... weseenset 
20-4. Malfunction Judgment with the Self-Diagnostic 

Function of the Outdoor Unit... cone Yd 
20-5. Malfunction Judgment with the Self-Diagnostic 

Function of the Multi-Controller ... essosecsszscssssensO4 
20-6. PMV Opening Degree, Temperature ‘Sensor end 

Pressure Sensor Data Code Display 

Conversion Table.....ccssscescssvsssesrserssensecnsesessnsessessesensO? 






OTHERS wiissccansacccesccancdccctocusccevacceccosacvecoscoedeesecse 71 
21-1. Microprocessor System Diagram and the Time 
Required to Judge the Malfunction. .....rscssersssasssssers 71 
21-2. A Check of the Control Circuit Power Voltage of 
the Multi-Controller Control Board... oniscaeseisaacet 2 
21-3. A Check of the Control Circuit Power Voltage of 
the Outdoor Interface Board ......scecssssvescsecorsssvesersee dO 
21-4. 220 — 240V System Diagram ......ccssseosssacssevesssrssessene 74 
REMOTE CONTROLLER DISCRIMINATION 
FUNCTION, OUTDOOR UNIT 
DISCRIMINATION FUNCTION ....... saseseeussseuenns 76 
22-1. Search from the Remote Controller ....sscseccssesssessnees 76 
22-2. Search from Outdoor Uniit.....sccsscsseccscncssseserssesencnces 76 
CHECK FOR REFRIGERANT PIPING AND 
INTER-UNIT WIRING CONNECTION...........cc00 77 
23-1. Check System ProcedureS.....scccseovensseovssvsresesrenterees 77 
REMOVAL METHOD .........sccccccssseccensecesccssrenece 78 
24-1. Outdoor Unit (MAR-F81HTMS8, F101HTM8) .......00000078 
24-2, Multi-Controller (RBM-Y1031FE, Y1041FE).....0400.83 
EXPLODED VIEWS AND PARTS LIST............ 86 


25-1. Outdoor Units 

(MAR-F81HTM8, MAR-F101THTMB8).....cccesscssrecsssosseses8 6 
25-2. Electrical Parts Assembly 

(MAR-F81HTM8, MAR-F1IO0THTMB).....csscssssscersneesserees 88 
25-3. Multi-Controlier 

(RBM-Y1031FE, RBM-Y1041FE).........sscsccsscsssseseemee IO 
25-4. Electrical Parts Assembly 

(RBM-Y1031FE, RBM-Y1041FE)........rsccccscesssscesessnens Df 


41. MULTI AIR CONDITIONER SYSTEMS AND THEIR BASIC 
COMPONENTS 


These multi air conditioner systems allow separate operation of each indoor unit in both heating and cooling 


simultaneously. 





Heating operation 


Lb Cooling operation 





Indoor units 


Fig. 1-1 


Danger: Be sure to provide a ventilator in a room, because; 
This multi air conditioner system contains a largé amount of refrigerant (HCFC 22). In the worst 


case of a refrigerant leakage from a indoor unit, a room equipped with the indoor unit is filled 


with a large volume of refrigerant gas. 
Consequently, people or animals in the room may be suffocated by lack of oxygen. 


1-1. Indoor Remote Controllers 
indoor remote controllers come either with or without the automatic heating/cooling mode function. Automatic 
heating and cooling operations can be controlled by those that equipped with the function. 


1-2. Outdoor Units 
Two types of outdoor units are available in the line-up: 8 HP and 10 HP. For 16 HP or larger applications, 
both types are used in combination. 


1-3. Multi-controllers 

Multi-controllers are refrigerant distributing devices to connect multiple indoor units with the outdoor unit. The 
series includes 3-way (for 3 indoor units)and 4-way multi-controllers. To make a 5-, 6-, 7- or 8-way (for 8 
indoor units) system, the 3-way and 4-way multi-controllers are used in combination with a header. 


1-4. Indoor Units 


There is a wide range of indoor units totaling 13 models (3 types with 6 capacity ratings from 1.5 to 5 HP). 
Refer to table 4-1. 


2.CONTROL SYSTEM 


The refrigerant and electrical systems of the multi air conditioner system are controlled by the 
multi-controllers and microprocessor contained inside the outdoor unit. The indoor units of the Cool/Heat 
Flex Series of Multi Air Conditioner Systems are the same units as in the RAV-series air conditioner systems. 


For system operation, first the microprocessor in each indoor unit reads the difference between the current 
room temperature and desired temperature which has been set by the remote controller, determines the 
corresponding demand signal, and transmits this to the multi-controller microprocessors in the form of 
operation commands (ON/OFF, cooling/heating operation mode, operation frequency of the compressor). 


On the basis of the operation commands sent from all the indoor microprocessors, the multi-controller 
microprocessors adjust the cooling and heating operation commands and send them to the interface 
microprocessor in the outdoor unit. The interface microprocessor calculates the capacity required for cooling 
and heating, determines the operation mode in the outdoor unit and calculates frequencies of the 
compressor and all the requested heating command difference between all the requested cooling command 
frequencies of the compressor of all the indoor units. 


| 





indoot unitI-A 





Fan 
Temp. sensor 
Drain pump 


Indoor unit microprocessor 


Remote 
controller 


Os 
= ae 
2 ae 


“0 
a aes 
~C 
1-D [ 





Outdoor unit 








Multi-controller 


Protection unit 








7 


Capacity rank 


setting SW Comp. sensor 


Temp. sensor Temp. sensor 


Electronic flow rate 
adjustment valve 


Electronic flow rate 
' | adjustment valve 


SN 
2 oT 


ae Multi-controller microprocessor Interface microprocessor 








t 
Display LED Compressor H 
t 
' 
; 2-way valve Display LED 
es, | 
2-way valve 
' 
Fan : 
' 
i 
| SS ee 
3 | 
t 


mea : F 
a Multi-controller microprocessor 


Inverter 


J 
microprocessor _{ (nverter 


Fig. 2-1 


3. REFRIGERANT CYCLE DIAGRAM 


(49}}0,U09 HINA) 


Joyojunooy 


(For high pressure relay) . 


sv 


pis 


>< 
P9POd 5 s06 ebsoyosigy 


se6uoyoxs j0ay 
SOSUGS OMNSEOIg WOW yun 100p;nD 


Daneutimtaaiesieetancamenaaiestanme ates tenet eect et eee 


(HNO/A 


Quan 400pul) 





Fig. 3-1 Examples of 8 and 10 HP 


4. COMBINATION OF INDOOR UNITS AND OUTDOOR UNITS 


4-1. Basic Criteria for Combinations 
(1) For details of indoor units to be connected, refer to the each Service Data for indivisual RAV-series split 
system air conditioner. 


Table 4-1 Available indoor unit model name and service data file number 


Capacity 
Rank; — 130 160 
RAV-160KH-P | RAV-200KH_ | RAV-260KH-P 
No. 300-885 | No. 300-855 | No. 300-885 
Guasatio RAV-130UH-P | RAV-160UH-P RAV-260UH-P | RAV-360UH-P | RAV-460UH-P 
: No. 300-949 | No. 300-883 No. 300-883 | No. 300-881 | No. 300-881 
RAV-160BH | RAV-200BH | RAV-260BH-P | RAV-360BH-P | RAV-460BH-P 
No. 300-842 | No. 300-842 | No. 300-920 | No. 300-920 | No. 300-920 


(2) The indoor units have code numbers according to their capacity ranks. (See Table 4-2.) 










Table 4-2 Code numbers of indoor units 


200 ae ae 





(Ex. Model RAV-360UH-P — Capacity rank 360) 


(3) Indoor units within a determined range of codes can be connected to the outdoor units (minimum code 
and maximum value of code number total). (See Table 4-3.) 


Table 4-3 Code of outdoor units 


eee Max. Connected Unit Min. Code Max. Code 
Equivalent HP 


(4) Only one multi-controller is needed when using up to four indoor units, but for five to eight indoor units, 
the system is divided into two parts and a multi-controller is connected to each, so two multi-controllers 
are necessary. 

Note: It is possible to connect indoor units with a total capacity exceeding the capacity of the outdoor 

unit (by a maximum of 135%), but the maximum capacity at which operation is possible at any 
given time is the maximum capacity of the outdoor unit. 










p= 


4-2. Procedure for Checking the Combination 


Temporary decision on indoor and outdoor unit 
combination. 














©) Is the number of indoor units 
for connection to the outdoor unit 
appropriate? (Table 4-2) 






© Is the indoor unit code equal 
to or above the minimum code? 
(Table 4-2) 


(d) Is the total of the indoor unit 
codes equal to or below the 
maximum code? (Table 4-2 


YES 


Decision on indoor unit and outdoor unit combination. 







1 to 4 units § to 8 units 


@® What is the number of indoor 
units to be connected? 


@ Use one multi- @® Use one header and 
controller. two multi-controllers. 


Note: A multi-controller is necessary even when only using one indoor unit. 
For each procedure in the above flow chart, please refer to Fig. 4-1. 


4-3. Examples of Connection Check 












Indoor Unit (Rank) Multi-Controller Outdoor Unit 


RBM-Y1031FE 


MAR-F81HTM8 


Selecting 
Header 





© 


MAR-F101HTM8 


Fig. 4-1 


Indoor unit © a rcneeldg 
code igs 


Type —- 423 


The smallest 


Type = 523 } outdoor unit 
code 


Type — 823 


Total Indoor 
unit code 


Outdoor unit Max. code 


Type — 323 


Type - 323 


Type —- 323 
Type > 323 
Type = 423 
C200) Type + 423 
C200") Type + 423 


Total Indoor 
unit code 


Outdoor unit Max. code 





5. SPECIFICATIONS OF OUTDOOR UNIT 


Table 5-1 


B|_Operatingcurent A) | tty) | 8.70172) 

2|_ Operating current (A) 
Power factor (%) 
[| Starting curent Aw 















|_Heating | Cooling | 






Starting method 
Dimensions (H x W x D) (mm) 1,490 x 1,290 x 750 1,490 x 1,290 x 750 
Net weight (| 30's | tt 
Finished color Silky gray (Munsell 6Y7/0.3 

6 






3) 


Flare connection (liquid side/discharge gas side), 
Coupler style Brazing connection (suction gas side) 









a 
ry 
3 
c 
2. 
- 


me) 
® 
2 
3 
a 
@ 
= 
ry) 
= 
— 
3) 
> 
© 
a 
® 
a 
= 
@ 
a 
= 
Cone 
-— 











Max. equivalent piping length Ne ie 1s we 


: (m) 
100 : The equivalent length is the base if there are 
Max. actual piping length (m) too many bends. 
- 50: In case of outdoor unit installed above 
Max. piping head (m) . 120: In case of outdoor unit installed below : 
Crank case heater (W) 74 


Note: x1: Cooling/Heating capacity is based on JIS B 8615. The value marked by ( ) means operation 
at maximum capacity. 
*2: Power voltage, if it varies, should be within a 10% range. 
Specifications are subject to change without notice. 





5-1. Explanation of Electric Characteristics Calculation 
Calculate with the formulas below seeing Table 5-2. 
Total input PT = ZP (kW) 


Total current It = V(Zip) 24 (ZIv) 2 (A) 


Total power factor f= ZXlp/It x 100 (%) 


Table 5-2 


Model Name MAR-F81HTM8 MAR-101HTM8 
Power consumption P (kW) 8.0 (9.2) 10.1 (11.5) 
Cooling 






Note: The value marked by ( ) means operation at maximum capacity. 





Example: MAR-F81HTM8 x 1 unit + MAR-F101HTM8 x 3 units 
Rated value at cooling operation: 
Total input Pt; =8.0+ 10.1 x3 = 38.3 (kW) 


Total current It1 = V(11.6 + 14.6 x 3) +(4.14+5.8x 3° = 59.4 (A) 

Total power factor f = (11.6 + 14.6 x3) x 100/59.4 =93 (%) 
Like this, calculate the maximum value at cooling operation, both rated and maximum value at heating 
operation by turns. 


-~10- 


6. EXTERNAL VIEW 
6-1. Outdoor Unit 


Anchor bolts 


Hole for anchor bolt 
4-15 x 20(slotting hole) 





Air outlet 











Refrigerant piping joint 


Side air intake {suction gas side A) 












Refrigerant piping joint 
(discharge gas side 019) 





248 knockout hole 
Inter wiring entrance 


ZIJN TFIID 


on | 





Dimensions: (UNIT: mm) 


Model MAR- 
F1HTMS 
F101HTM8 


1182 











-tt- 


640 
100 or more 


6-2. Multi-controller 
RBM-Y1031FE 








Indoor unit side 









Oval hole for 
hanging bolt 





500 
or more 





iit rtd tit thi 
—~ yo ——? — 


To indoor unit A To indoor unit C 
To indoor unit B To outdoor unit 


Electric parts box 


450 x 450 inspection opening 
installation space 
Note: Make an inspection opening at the specified place. 
It is indispensable for test run and servicing. 


Recommended size: 
450mm x 450mm over 


Refrigerant piping joint (flare) 
Liquid side @ 15.9 


Electric parts box 
Wiring entrance 












Note: Please install 

this side up. 
F aid the Wiring entrance @ 36 
Refrigerant piping joint (flare) 
Gas side a 19 90 540 170 __| Refrigerant piping joint (brazing) 
Fig. 6-2 Suction gas side 28.6 


Refrigerant piping joint (flare) 
Liquid side @ 9.5 Refrigerant piping joint (flare) 
Discharge gas side @ 19 


RBM-Y1041FE 100 or more 







Oval hole for 


hanging bolt Outdoor unit side Indoor unit side 





tod tid Pid 1 
To indoor unit A To indoor unitC To outdoor unit 
To indoor unitB —- To indoor unit D 


Electric parts box 

450 x 450 inspection opening 

installation space 

Note: Make an inspection opening at the specified place. 
Itis indispensable for test run and servicing. 


450mm x 450mm over 
Refrigerant piping joint (flare) 
Liquid side @ 15.9 


Electric parts box 
Wiring entrance 
530 







Note: Please install 





this side up. Wiring entrance @ 36 
Refrigerant piping joint (flare) Refrigerant piping joint (flare) 
aU eee sales Refrigerant piping joint (brazing) \ Refrigerant piping joint (flare) 
Fig. 6-3 Suction gas side 28.6 Discharge gas side @ 19 


42 


6-3. Header 
RBN-HD821FE, RBM-HD1021FE 


Inner Diameter oC 






\. Inner Diameter oD 


Fig. 6-4 


Table 6-1 Dimensions 










| = TypeRBM RBM- 


_ celal 
RBM-HD821FE 






Sena | [asm 


[Liquid gas side _| gas side 


Eolas geall gas 
Eolas geall 


aaeee eet Suction gas side | 62 | 41 [28.7|19.1| 


Table 6-2 
| Distribution | 5s sway 
RBM-HD821FE | RBM-HD1021FE 





Outdoor unitto | MAR-F81HTM8 | MAR-F101HTM8 
be connected (8 HP) (10 HP) 
| 


-13- 


7. WIRING DIAGRAM | 
7-1. Outdoor Unit (MAR-F101HTM8/MAR-F81HTM8) 


Symbol 
CM 1,2 
FM_1,2,3 


52C 1,2,3  jElectromagnetic 
contactor for 
compressor 


49C 1,2 Inner overload relay 
Overload rela 


PMV 1,2 Electronic flow 
control valve 


3H 1,2 igh pressure switch 









Notes 

1.The dashed line and two-—dot—dash line 
indicate wiring on site. 

2.© and (1 indicate terminal block, and 
numbers within them are terminal numbers. 

3.ZZA indicates a printed circuit board. 


DANGER 


THE ELECTROLYTIC CAPACITORS IN THIS 
PANEL ARE CHARGED TO 600 VOLTS D.C. 
BEFORE SERVICING, TURN OFF THE POWER 
SUPPLY AND ALLOW AT LEACT 20 MINUTES 
FOR THE CAPACITOR DISCHARGING TO A 
SAFE LEVEL OF 5 VOLTS D.C. OR LESS TO 
AVOID POSSIBLE HAZARD. 

TEST WITH A D.C VOLTS METER AS SHOWN. 












Bectric starter x Power 





























wn 


©} 


a 


Hai 
H 

IRC 1,2. [Running capacitor NEE ee 128 ae 0S ee BCE 
SV 1,2,4,5,13,15,16}2-way valve 

4~way valve 

63. _—_ {Low pressure switch 
ILD 71,72,73,74 {Fault indicator lamp 


1D 


MCC—1252 n20 Caverter? 





Miho 





=/-10 







ar Pee 


NEVER SHORT THE CAPACITOR TERMINALS WITH 
ANY METAL IMPLEMENT FOR DISCHARGING. PERSONAL 
INJURY OR EQUIPMENT DAMAGE MAY RESULT, 











Inverter Control PC board MCC~1251 











Parts layout 






Pressure Tho1 ThO2 Ths Te Rie] 
1D7) LD72. 107374 <= , x , 
I. é@ [é [6 [8 [8 
Ue. Us Ue — -Ji2[sisisisl 1112) 3} Lj 213) izt3) bi 213) i2t3} EiSetrolyés 
ate Zee (gi MUL sa, UU SO UO Brain 


Interface Control PC board MCC-1223 


P, PBZ PTY Pi9F P00 Y punZ We 
4) 14} [ 2) 3) 


Z PunY Ps20F Wy 9 F | } 
i213) Lf 2{3]415{637) i2}3]4}516)7} bij2tsi4[5isi7] Lir2islsisisi7t Lif2}si4{s} Lf 2) iit WH w 
(ee [pus jan g a 2 aie gee z Git Se ee ee ee : 
ttf} ff ft : 


| | b+} + 





irre 5 ole Ree 9 El Soo ; 


Li} 2] 
aN 


ieee eee 
at eee — eer 
ee 


BEE 5125135) ‘ 
[sisi 7iaiot lsisisiztsts| 
: 

Fn i 


Fuse 20Ax3 


ag “1 7 
OO 


il , : 
aoe 684 CURLY 
igi LiL 2tst4l 


sce BET) 8 


Power supply 












mo ee 
Lt2isis! Li 213) bg ilz1314) 12} Uizisisisis) Lil2isisisjs) 
Zz] > 
Surge Power supply 63 
= om a) | ete |) ofa : 
= a Se | ew | [pve | 





-—~15- 


—-14- 


7-2. Multi-controller (RBM-Y1031FE, Y1041FE) 


'@® @ ® @ 
Fah Aa eh 


alin 
Die oeerenenane 
Gogg att 


Parts layout 


Control PC board 


Reset 
switch 


Terminal plate 





~16~- 


ThD ThX | . 
Z @ ¢ i 


a 


HD : 


312 
Ya S432 Vass, Bei YWBRoYMB2hyiszeiyaenya Pe BP 


MMMM EE LY 


Spark killer 


10101 D102 LO103 LD104 


selector switches 


if 
talked AAG 
sie PJI0 
Y 7 segment LED 
“ext (O] (O] (CO) (CO) O) 
setting 
Room Room Room Room Display 
A B c 5 
UM Wily 
PJ23 PJ24 
Ai{2[3}4| 2411213} 4 
EE 






frases 


a 

Fteeeny nee famed 
Loo eeul at 
aiferfasferfeates}  [oifozfosfoifo2fos] [1X23] 







Indoor unit * * Indoor unit + & Indoor unit # +§ Outdoor uni 


i 
i 
I 
t 
| 


Remenber: 

For quick reference on connection between the 
multi—controller and indoor units, enter indoor 
unit models connected, installation locations, 


and code setting in the table below. 


aS 


1} 213) 

Puié . 
Indoor unit 
LL 










xl] 
oA as & : Indoor unit 
[=] 8 
ji 
on ee Indoor unit 
Plz] | | 
ka Indoor unit 
ofa D 
an 
[=] 
a 
Pape 
UY, 


1. ©and O indicate terminal blocks, and numbers 
enclosed in them are terminal numbers. 


. The two~dot dash line indicates wiring on site. 
‘ indicates a printed circuit board. 
. The CS frame indicates the product body. 


. RBM—Y1I03IFE does not have PMVD, SVD(D) 
SVS(D),@— ©, ThD and capacity rank code 
setting switch for room D. 






Ground screw 





a ee ot ne cee me ee oe ee ed ne mn ca nw 2 Me ew eo ements os ema os een eee 2 es = wal 
ue WwW hb 


~ 


ocean & ee ae 


Syrbal Synbal 





PMV A,B,C,D | Flow control valve | SVD(A),(B),(C),(0)| Electrically operated valve of discharge gas side 
Th A,B,C,D,X SVS (A),(B),(0),(D) | Electrically operated valve of suction gas side 
Sv0__| Electrically op 


SVDD Electrically operated valve for pressure raising 
Float switch SVSS Electrically operated valve for pressure decreasing 


Heater Electrically operated valve for superheat control 
Reset switch LD 101,102,103,104 | Fault indicator lamp 


~17~ 













8. ELECTRICAL PARTS SPECIFICATIONS 
8-1. Specifications of Refrigerant Cycle Parts 


Model Name MAR-F81HTM8 MAR-F101HTM8 
Hvesocw-vi2__ | _Hv1200¢W-V12 
S-phase induction motor 











Power supply 3-phase, 380 — 415V, 50Hz 


ay 2FId 
8 a {5 
< jo 


Output kW) 





( 
Pole (P 2/2 (Inverter side/Non-inverter side) 
( 


) : 
1.49/2.51 
Coil resistance ®) (Inverter side/Non-inverter side) 
) 
) 






or type i 
Blower 
ee 


Pole (i i Veena 
OFF:115 + 5°C 
20PS-B/20PS-G (Inverter side/Non-inverter side) 


OFF: 30, ON: 23/OFF:23, ON: 30 



























Inner over-load relay 
Model name 





Operating pressure 
20PS-1 


Operating pressure (kg/em?G) ON: 1.5, OFF: 0.25 


V25-7608 
Compressor case heater AC240V, 74W 


Model name: 2S5F-A1 
Input voltage: DC 12V 
Output voltage: DC 0.5 ~ 4.5V 


25°C: 50kQ, 50°C: 17.9kQ, 100°C: 3.35kQ 
Suction temperature sensor 0°C: 32.8kQ, 25°C: 10kQ, 50°C: 3.6kQ 






Pressure sensor 


Discharge temperature sensor 
















2-way valve 


Specifications are subject to change without notice. 





-18— 


8-2. Specifications of Inverter Assembly Parts 


Model Name 
Power supply 
Output voltage at operating frequency of 60Hz 
Blower motor running capacitor 
Rectifier 
AC noise fitter 
DC noise filer 
Power supply rectifier capacitor 
Electronic starter 
Reactor 
Fan motor relay 
Control relay 


Magnetic contactor for compressor (Inverter side) 13A 

























Magnetic contactor for compressor 
(Non-inverter side) 


) FT57 


Transformer (Interface) 











bam 
ey) 
p=] 
n 
pie 
S 
5 
© 
oe 
— 
3 
< 
Oo 
pas 
@O 
Ra) 

7 

© 

rp 


Power supply terminal plate AC600V, 60A 


PC board (inverter) MCC-1251 


PC board assembly (Interface) MCC-1223 
3650EXV-5, 220 ~ 240V 








Cooling fan 





Specifications are subject to change without notice. 


-19~ 


8-3. Specifications of Multi-controller Parts 


Model Name RBM-Y1041FE 
Flow rate adjustment valve 
Temperature sensor 
Flot swith 
Power supply transformer sui aller 
Relay (on PC board) 
| 
ew 
Temperature fuse for heater 
1 


Power current fuse for heater 


Discharge gas side solenoid valve 
Suction gas side solenoid valve 
2-way valve 
2way valve 


Specifications are subject to change without notice. 























c 
a 
= 
@ 
“— 










—~20- 


9. 


Ambient air dry-bulb Temperature (°C DB) 


Cooling/Heating Capacity Characteristics 
9-1. Range of Operation 


Ambient air dry-bulb Temperature (°C DB) 
Ambient air wet-bulb Temperature (°C WB) 


if 
2s 
ES 
of 
88 
oo 
2D 
8g 
co 
& © 
sr 
Ex? 
=€ 
oO 6 


Simultaneous cooling 
o 


=] and Heating operation 


Hl 





15 20 25 


Room air wet-bulb Room air wet-bulb Room air dry-bulb Room air dry-bulb 
Temperature Temperature Temperature Temperature 
(°C WB) (°C WB) ® (°C DB) ® (°C DB) 


Fig. 9-1 
Note: @:\Indicates the standard internal air temperature for the cooling operation. The internal air 
temperature range for the indoor unit during the heating operation is 15 to 28°C DB. 


@®:When cooling load is higher and heat is being exhausted from the outdoor unit. 
©:When the heating load is higher and heat is being absorbed by the outdoor unit. 


-21- 


9-2. Cooling Capacity Calculation 


Corrected cooling capacity = Standard cooling capacity x (O x @ x @ x @) 


@ Room Air Wet-Bulb Temperature Conditions and Capacity Correction Factor 


1.2 
Capacity cor- 
rection factor 1.1 





"15 20 - 24 
Room air wet-bulb temperature (°C) 


Fig. 9-2 
® Indoor Unit Air flow Volume and Capacity Correction Factor 
(Built-in Duct Type Only) 


Capacity cor- 
rection factor 





80 90 100 110 120 


Air flow volume variation ratio (%) 


Fig. 9-3 


® Ambient Air Dry-Bulb Temperature and Capacity Correction Factor 


Capacity correction factor 
He (A 
+4 (oP Cr 
1.0 


0.9 
0.8 





Ambient air dry-bulb temperature (°C) 


Fig. 9-4 


—22— 


® Piping Head, Length and Capacity Correction Factor 






EEE 
wo NEUE EAL 
PINT AAAS YY 


10 20 30 40 50 60 70 80 90 100 110 120 
Length (equivalent length) L’ (m) L’ is the longest one of 2'o + 2'a, 2'0 + 2b, L'0 + f'c 
H =ho + (largest one of ha, hb and hc} 





Height of outdoor unit H(m) Piping 





Fig. 9-5 
9-3. Heating Capacity Calculation 
Corrected heating capacity = Standard heating capacity x (O x @ x @ x @) 


® Room Air Dry-Bulb Temperature and Capacity Correction Factor 


Capacity corre- 
ction factor 





Room air dry-bulb temperatuer (°C) 
Fig. 9-6 
@® Ambient Air Wet-Bulb Temperature and Capacity Correction Factor 


Capacity corre- 
ction factor 





Room air wet-bulb temperature (°C) 


293 


© Indoor Unit Air Flow Volume and Capacity Correction Factor 
(Only for Built-in Duct type) 


Capacity corre- 1.1 
ction facotr ee ea es 
Pr re a Pe 
ee eee ee 
o9L_ft [ ff 


80 90 100 110 120 


Air flow volume variation ratio (%) 


Fig. 9-8 


® Piping Head, Length and Capacity Correction Factor 


ptt | AAR AAA 
Hk MAA AA 









Height of outdoor unit H(m) Piping 


10 20 80 40 50 60 70 80 90 100 110 120 
Length (equivalent length) L' (m) L' is the longest one of 2'o + 2'a, L'o + £'b, 2'o + £'c 
H = ho + (largest one of ha, hb and he) 


Fig. 9-9 


~24— 


10. AIR TIGHTNESS TEST, AIR PURGING WITH A VACUUM PUMP 
AND CHARGING OF ADDITIONAL REFRIGERANT 


Make sure to do the “Flushing” of the refrigerant pipes between indoor units and multi-controller, and 
multi-controller and outdoor unit. 


After the flushing work is done, connect the pipes (liquid side, suction gas side, discharge gas side) and 
conduct the Air Tightness Test, Air Purging and Additional Refrigerant charge in turn. 


10-1. Air Tightness Test 


This test uses nitrogen gas under the pressure of 30 kg/cm?G. 


(1) Do not operate the packed vaive or service valve until completion of air purging. (Leave the valves 
closed.) 


(2) Air tightness test and air purging with a vacuum pump should be done before turning on the power. 


(3) The gauge manifold’s charge hose has a low pressure resistance, so always replace it with a copper pipe 
(66.4) for the test. 


(4) Connect the copper pipe to the charge port of the suction gas pipe’s service valve. 





Flare connection 


Charge port 





Service vaive 
Nitrogen tank 
Liquid pipe Suction gas pipe 
Discharge gas pipe 
Fig. 10-1 
Note: After connecting the copper pipe for charging, pressurize to 30 kg/cm®G, let stand for one day, 


then check that there is no change in the gas pressure. If the gas pressure decreases, there 
may be a gas leak. The place(s) from where the gas is leaking should be checked. 


~25- 


10-2. Air Purging with a Vacuum Pump 


(1) After completing the air tightness test, exhaust the nitrogen gas from the piping. 


(2) Connect the charge hoses between the gauge manifold and the liquid pipe and discharge gas pipe’s 
packed valve charge ports. 


(3) Replace the nitrogen tank with the vacuum pump. 


(4) Carry on air purging with the vacuum pump for at least 2 or 3 hours. When air purging is completed, close 
the gauge manifold’s valve (Vd). 







Gauge manifold 


Charge ports 


Packed valve | 


Liquid pipe Suction gas pipe 
Discharge gas pipe 


Fig. 10-2 


Note: 1. To prevent leakage, we recommend you to use a pump with a large capacity and complete 
purging quickly. 
2. Check that the gauge pressure is —76 cmHg. 


—26— 


10-3. Additional Refrigerant Charging 
(1) Replace the vacuum pump with the refrigerant tank, charge the stipulated amount of refrigerant, and then 
open both packed valve and service valve fully. If additional charge is needed, conduct the following. 


(2) Switch the charge hose to the suction gas pipe’s service valve charge port (dotted lines -» solid lines, one 
charge hose as shown in Fig. 10-3). 


(3) Attach the charge hose lightly to the suction gas pipes service valve charge port at first and Slightly 
loosen the refrigerant tank’s valves (Va and Vb). The air in the tank’s gas hose, gauge manifold and 
charge hose is expelled by the refrigerant. 


(4) Next, tighten the hose fully, then loosen the service valve and use the pressure in the tank to add the 
specified amount of refrigerant. If not enough refrigerant can be added, operate the unit and draw in the 
refrigerant in gas form from the low pressure side to supply the specified amount. 


Gauge manifold 
Low pressure (\) (7) High pressure 





Liquid pipe Suction gas pipe 
Discharge gas pipe 


Fig. 10-3 


“oF = 


11. PIPING LENGTH AND ADDITIONAL REFRIGERANT AMOUNT 


11-1. Main Branch (One Multi-Controller) 

At factory shipping, the "standard amount of refrigerant” corresponding to the "standard piping length is 
previously charged in outdoor unit. When the actual piping length exceeds the standard length, please add 
the supplemental refrigerant as follows. 


Branch pipes 


Table 11-1 


| Bo my | Lay Bo, Boy Ba (rm) 
Standard 
piping length 










Fig. 11-1 


* Main pipe:Piping between outdoor unit and multi-controller. 

* Branch pipe:Piping between multi-controller and each indoor unit. 

¢ Amount of additional refrigerant (kg) = Additional amount of main pipe (kg) + additional amount of branch 
pipe (kg) = M x (29 ~ 3) +Nax (2a—2) + Nbx (2pb-2) + Nox (2c — 2) + Nd x (2g — 2) 


Table 11-2 Amount of additional refrigerant 


Additional Amount 
. Indoor Unit Capacity Rank 
SdooEnnut (Equivalent Horse Power to Multi Type) M (kg/m) 


MAR-F81HTM8 130 (1.5 HP), 160 (2.0 HP), 200 (2.5 HP) 


(Standard amount of 
refrigerant 17.6 kg) 260 (3 HP), 360 (4 HP), 460 (5 HP) 


(Standard amount of 
refrigerant 21.6kg) 260 (3 HP), 360 (4 HP), 460 (5 HP) 





| MAR-F101HTM8 130 (1.5 HP), 160 (2.0 HP), 200 (2.5 HP) pow | 


| 0.030 _| 
* M = Amount of additional refrigerant for every 1m of actual length of main pipe 

(The value varies depending on the type of outdoor unit.) 
¢ Na, Nb, Nc, Nd = Amount of additional refrigerant for every 1m of actual length of branch pipe. 

(The value varies depending on the type of indoor unit.) 


£o = actual length of main pipe (m) 
Ba, 2b, 2c, 2a = Actual length of branch pipe (m) 


“OB 


11-2. Sub Branch (Two Multi-Controllers) 


Branch pipes 


Table 11-3 


4, £2 £2, £p, £., Lu, £e, 
(m) | 2,29, £n(m) 





Fig. 11-2 


« Main pipe:Piping between outdoor unit and header. 

¢ Sub pipe:Piping between header and each multi-controlier. 

¢ Branch pipe:Piping between multi-controiler and each indoor unit. 

* Amount of additional refrigerant (kg) = Additional amount of main pipe (kg) +Additional amount of sub 
pipe (kg) + Additional amount of branch pipe (kg) = M x (20 — 2) + S x {(21 — 1) + (22 -1)} + Na x (2a — 2) 
+ Nb x (2b — 2) + No x (2c — 2) + Nd x (2d — 2) + Ne x (Le — 2) + NE x (£f — 2) + Ng x (Lg ~ 2) + Nh x (2n — 2) 


Table 11-4 Amount of additional refrigerant 


Additional Amount 


indoor Unit Capacity Ranks 


culener ese (Equivalent Horse Power to Multi Type) 


130 (1.5 HP), 160 (2.0 HP), 200 (2.5 HP 
260 (3 HP), 360 (4 HP), 460 (5 HP) 


130 (1.5 HP), 160 (2.0 HP), 200 (2.5 HP) 


(Standard amount of 





* M = Amount of additional refrigerant for every 1m of actual length of main pipe 
(The value varies depending on the type of outdoor unit.) 


¢ §= Amount of additional refrigerant for 1 m of actual length of sub pipe. 

* Na, Nb, Ne, Nd, Ne, Nf, Ng, Nh = Amount of additional-refrigerant for every 1m of actual length of branch 
pipe. (The value varies depending on the capacity rank of indoor unit.) 

* o = Actual length of main pipe. (m) 

* £4,220 = Actual length of sub pipe (m) 

© La fb, fc, 2a, Le, 2, 2g, 2h = Actual length of branch pipe. (m) 


~29 — 


12. DESCRIPTION OF OPERATION 
12-1. Simultaneous Cooling/Heating Operation Control Outline 


12-1-1. Switching between the Cooling and Heating Operations for 


Each Indoor Unit 


The solenoid vaives inside the multi-controller are switched with requested commands sent from the indoor 
unit. 

* SVS valve (at suction gas side) opens for a cooling command. 

¢ SVD valve (at discharge gas side) opens for a heating command. 


12-1-2. Determining the Outdoor Unit Operation Mode (Cooling/Heating) 


and Operation Frequency of the Compressor 


The cooling or heating mode of the outdoor unit and the operation frequency of the compressor are 
determined by difference between all the requested cooling command frequencies and all the requested 
heating command frequencies of all the indoor units. 


12-1-3. Controlling the Refrigerant Cycle in the Outdoor Unit during 
Simultaneous Cooling-Dominant Operation 


(1) Flow control 
in order to divide the cooling exhaust heat appropriately to the indoor units in the heating operation and 
outdoor heat exchanger, the opening of the PMV2 flow control valve is controlled by the difference 
between all the requested cooling command frequencies and all the requested heating command 
frequencies and by the operation frequency. 

(2) Pressure control 
Constant high-pressure control is performed so that the capacity of the indoor units in the heating 
operation is maintained. 
1) Outdoor fan control 
2) Switching between the outdoor main heat exchanger and the sub heat exchanger 


Since the high pressure may drop even when the fan is shut down by the outdoor fan control if the 
outside air temperature is low and the difference between the cooling and heating command frequencies 
is minimal, the main heat exchanger is switched to the sub heat exchanger which is smaller than the 
ordinary main exchanger. 


12-1-4. Controlling the Refrigerant Cycle in the Outdoor Unit 


during Simultaneous Heating-Dominant Operation 


(1) Expansion valve control 
Control for preventing superheat is performed by the outdoor heating expansion valve. 

(2) Evaporating temperature control ; 
The evaporating temperature control is performed by outdoor fan control so that the capacity of the indoor 
units in the cooling operation is maintained. ~ 


=30= 


(3) Switching between outdoor expansion valve control and capillary control 
When there is a minimal difference between the cooling and heating frequencies and the heat absorption 
by the outdoor heat exchanger is low, the expansion vaive is no longer capable of controlling adequately 
the flow. This results in capillary control being selected. 


12-2. Functions and Operations of Solenoid Valves 


12-2-1. Multi-controller 
(1) Valve functions 


Symbol Name of Valve Description of Function 


This opens to the extent corresponding to the capacity 
and performance required of the indoor units in each 
system. 


: Opens when commands from the indoor units in each 
SVS (A, B, C, D) | Suction gas valve system call for cooling, 
: Opens when commands from the indoor units in each 
SVD (A, B, C, D) | Discharge gas valve system calll for heating, 
Opens when number of units in heating operation is 
SVSS Pressure reducing solenoid reduced (heating —» shutdown or cooling). 















PMV (A, B, C, D) | Flow rate control valve 









vaive Opens when defrosting starts 
Opens while oil recovery is controlled in cooling. 


Opens when number of units in heating operation is 
SVDD Pressure increasing solenoid | increased (shutdown or cooling —» heating). 
valve Opens while control is performed to prevent liquid in 
discharge pipe from being blocked. 


SVH Superheat solenoid valve Opens when unit in cooling operation is present. 


Operation Mode Indoor Operation Mode PMV (Normal) 


Shutdown | OFF | Fuly closed 
[Shutdown fan | ore TON Futy cose _| 
cooing | rr TN | Rated opening | 
[Cooling thermo-controlorr | orF | ON |_Fully closed _| 
Heating NF Ratedopening _ 
[Heating thermo-controlOrF |. ON | 































During operation 





-3i- 


12-2-2. Outdoor Unit 
(1) Valve functions 


Symbol Name of. Valve 


20SF 
Selects whether the sub heat exchanger is going to be 
used or not. 


Sub heat exchanger solenoid 
euie valve : 
Opens when sub heat exchanger is to be used 
$V13 Cooling solenoid valve | Opens for cooling-only operations. 


Controls flow to divide cooling exhaust heat between 
indoor units in heating operation and outdoor heat 
exchanger during simultaneous cooling-dominant 
operations. 
PMV2 
SA valve 
SV16 : et cooling/heating during simultaneous operation 
solennid valve OF eapllary (cooling/heating) under the heating-dominant operation. 
PMV1 Cooling bypass flow control Degree of opening is controlled by discharge and 
valve suction temperature. 
SV1 High-pressure release Opens and closes with the heat exchange temperature 
solenoid valve (TE). 


. Opens and closes with the pressure and outside air 
Sv4 Solenoid valve for startup Opens when the compressor (No. 2) at the non-inverter 
compensation side starts up. 


Opens when the Inverter compressor is shut down. 


Description of Function 


Selects whether outdoor main heat exchanger is to be 
used as condenser or evaporator. 
OFF: Condenser, ON: Evaporator 





















4-way switching valve 
Selects whether outdoor main heat exchanger or sub 
heat exchanger is to be used. 

OFF: Main exchanger, ON: Sub exchanger 






























Outdoor flow control valve 
* ts opening is increased in accordance with 


cooling/heating difference. 





* Its opening is adjusted by the adjustment signal 
from the multi-controller. 














Opens or closes to select the expansion valve or 


Solenoid valve tor expansion capillary tube according to the difference of 





—32- 


(2) Valve operations 


Outdoor Operation Mode 


Outdoor main heat 
Cooling operation exchanger 

Sub heat exchanger 
Heating operation | - 


: Outdoor main heat Opening degree 
al sat nl 
cooling-dominant 
operation Sub heat exchanger state degree 


Simultaneous Expansion valve 


heating-dominant 
operation Capillary 


13. OPERATIONS OF EACH SENSOR 





13-1. Multi-Controller 













According to a temperature difference between the evaporator outlet 
temperature (ThA, B, C, D) and pseudo saturation temperature (Thx) 





(1) Performs the open compensation of PMV in each system. (Cooling 
only, and Cooling-dominant operation) 


Temperature sensor 






(2) Performs the opening degree of the outdoor flow rate control valve. 
(cooling only, cooling-dominant operation) 






13-2. Outdoor Unit 
















Determines the frequency of the compressor Inverter side and ON/OFF 
status of non-inverter side. (cooling only, heating only, cooling-dominant, 
heating-dominant operation) 


Controls the outdoor blower. (cooling only, cooling-dominant operation) 


Controls the hot gas bypass SV2. 
1) Pd < 13kg/cmG: Open (cooling) 
2) Pd<17kg/cm?G: Open (cooling-dominant sub heat exchanger 
operation mode) 


Switches the outdoor unit main heat exchanger operation and sub heat 
exchanger operation 
Controls the open degrees of PMV1 (cooling bypass) 

Operation temperature: 20°C 
Stops when the suction temperature > 40°C continues for ten minutes due 
to detect the suction temperature abnormality. 


Controls open degrees of PMV1 (cooling bypass). 
Operation temperature: 110°C 


Stops when the discharge temperature >130°C due to detect the count 3 
discharge temperature abnormality. 
Multiples the time during TE <-3°C and performs the defrost control after 

55 minutes. (25 minutes when the power is turned ON for the first time.) 
Controls the outdoor unit blower. 


Controls the high pressure release. 
Opens when TE > 11°C. 


Controls the hot gas bypass SV2. 
Opens when the outdoor temperature < 0°C (10 HP). 
Opens when the outdoor temperature < 13°C (8 HP). 


Controls the outdoor blower. 


Identifies whether the forced cooling operation is performed. 
The forced cooling operation is performed when the outdoor 
temperature > 25°C. 


. ; Stops when Pd> 30 kg/cm2G in both of inverter side and non-inverter 
Engi pressure santen compressor side due to detects the high pressure abnormality. 


Stops all the operations 30 seconds after due to detect the gas leak 
abnormality. (Cooling, cooling-dominant operation) 











Pressure sensor 
(High pressure) 

















Suction temperature sensor 
(cooling only, heating only, 

cooling-dominant operation, 
heating-dominant operation) 














Discharge temperature 
sensor (cooling, heating, 
cooling-dominant, 
heating-dominant operation) 








Outdoor unit heat exchanger 
sensor (heating, 
heating-dominant operation) 





















Outdoor temperature sensor 
























Low pressure switch 
Operation pressure: 
0.25 kg/cm*G 






Stops all the operation after counting 10 minutes by the timer counter due 
to detect the gas leak abnormality. (Heating, heating-dominant operation) 


Ignores the low pressure switch operation. (Defrost operation) 


3a. 


14. COOLING/HEATING AUTOMATIC REMOTE CONTROLLER 


14-1. Cooling/Heating Automatic Change-Over Operation 







~ Power-save operation is 
tformed when the temperature 
Is closed to the setting temperature 
both in cooling/heating capacity. 


(G-~ Range) 


Setting temperature T1 (°C) 






Cooling 
operation 





Basic variation of Load variation Load variation 
room temperature (example) 





£ 

2 

£415 

2 40.5 

§ 0 

e 05 

8 -15 

faa 0.5deg 

Cooling operation | | Heating operation | 
Fig. 14-1 


a35< 


45. IMPORTANT MATTERS TO BE CHECKED BEFORE TEST RUN 
AND SERVICING 


15-1. Registered Indoor Unit Code Numbers 
Make sure code numbers of the indoor units connected to the multi-controller are correctly registered in the 
microprocessor. 


Registration of each indoor unit capacity is important. Register the correct indoor unit code numbers 
corresponding to the capacity rank setting rotary switch on the printed wiring board for Room A (unit A), 
Room B (unit B), Room C (unit C) and Room D (unit D). 


Table 15-1 Code table 


No connection 200 | 360 _| 
fCodenumber| 9 | 3 | 4 | 4 {| 5s | 8 | wo | 
















Capacity rank setting switch 












Capacity rank Capacity rank Capacity rank 
160 200 260 


Fig. 15-1 


Note: 1. At factory shipment, the indoor capacity rank setting switch is set at "0". With the switch left at 
the "0" setting, the air conditioner does not operate. 

2. If the power is on and even if you operate the capacity selection switch, the registration will not 
change. Make sure you operate the setting switch before turning on the power, or after 
operating press the reset switch on the multi-controller for more than three seconds, and then 
turn off the power to the microprocessor once. 

3. if the code number is not registered correctly, the required cooling, heating capacity will not be 
attained, or this could be the cause of malfunctioning. Also, when the total of the registered 
indoor unit code numbers exceeds 21 (8 HP outdoor unit) and 27 (10 HP outdoor unit), the air 
conditioner will not operate. . 


~26< 


15-2. Connections of Refrigerant Piping and Control Wires 


between Indoor Units and Multi-Controller 
Check the indications on the label at the refrigerant piping connection ports and control wire connection 
terminals. The control wires for indoor unit A of which refrigerant pipes are connected to the refrigerant port 
for unit A should be connected to the terminal for unit A, otherwise the operation won't be carried out 
properly. Confirm the connection for units B, C and D in the same manner. 


Multi-Controller Connector Terminal location Refrigerant piping joint of indoor unit side 
Inside of electric parts box 


Ay BEB ip] Bippyx []2I5) 


For 
outdoor unit 





Fig. 15-2 


15-3. Connections of Control Wires between Units 
Check that the control wires between the indoor units and Multi-controller and between the multi controller 
and outdoor unit are properly connected. Check to see the terminal numbers for the control wires. 


Multi-Controller 
For unit A For unit B For unit C For unit D For outdoor unit 





r) 5 ' 1 ‘ 1 ‘ 
|ncoor unit] [indoor unit [Indoor unite} [Indoor unit | cutdoor unit 


Fig. 15-3 


aaye 


16.TEST RUN. 


16-1. Test Run Procedure 
Conduct the test run as follows. Perform the test run according to each steps on the check list. 





Check before test-run. Check basic matters of installation works. Ensure to fill up the check-list 1. 





Check step by step following the check-list 2, and write down the results. 






Check the test run. 


Remove the cause of 
troubles 


Remedy malfunctions; following the flow-chart listed on page 44. 
Refer to step 3 (Service points), if needed. 





Note: Make sure to write the results on check-list #1 and #2. They will be very helpful documents for 
service and maintenance in the future. 


16-2. Check before Test Run 


Make sure to confirm there is no fault in the installation works. 


Table 16-1 Check list 1 












Is the installation work finished correctly? 









1. Is the capacity rank setting switch on 


eaceaad 
Indoor unit | Registered 
model 
WO | 
multi-controller control board registered | m/c(1) ‘units =| Ts 
correctly to each indoor unit code luitc =| Tl 
uta | 
me) (unite | | | 
2a ee eee 
a a 
Mae eae 










. Are there wrong connections of the refrigerant pipings and control wirings between indoor 
units and multi-controller? 






. Are there wrong connections of both control wirings between indoor unit and 
Multi-controller, and multi-controller and outdoor unit? 


4. Is the circuit breaker installed? Breaker capacity a. pa 





='38.- 


5. Is the breaker capacity adequate? : 


6. Is there any wrong wiring of power Powercable wine 
cable? 
7._Is the wire size correct? lcontrowire | mm] 
8. is there a wrong wiring between power source outlet and outdoor unit? 


_ 

aaa 

Eocaenal 

— 

oe 
easement Naan 

aca 

oe 












11. Is the voltage correct? 
12. Does the drainage flow smoothly? 


13. Is the heat insulation sufficient? (Especially connecting parts of indoor unit and 
multi-controller) 


14. Is there a short-circuit of air flow from indoor unit? 


16-3. Test Run Check 


After completion of the check before the test run, conduct the test run check with the following steps listed in 
the check list 2. 


(1) As for the actual procedure of check list 2 (See page 40.), and simultaneously remove the troubles. 


(2) More than 12 hours in advance of the test run, turn on the switch for supplying power to the crankcase 
heater. In the case that the compressor was not warmed up sufficiently by crank case heater, the cooling 
or heating operation won't work due to protective circuit activated. 


(3) The test run check, in principle, should be made for each and every indoor unit. If the multiple units are 
operating simultaneously, you can not carry on the check for the cross connection between refrigerant 
piping and control wiring. 


(4) To confirm cooling and heating operation, operate the unit under the mode within the possible 
temperature range to operate the units. 


(5) There are few cases when one of two operation modes is normal but the other is not. Make sure to write 
down the items you have checked. 


(6) For this check, you need at least a tester and screw driver (+, —). We recommend you to prepare a 
thermometer, pressure gauge and other tools (spanners, pliers, nippers, and pins for reset switch.) 


~ 


eS 


Table 16-2 Check list 2 












Check Items 





Operation Procedure 









Is the LED on remote controller 
blinking? 


MIC (1) 
Are the conditions initialized for 


operation? 
2. (Check the Fan operation) is the air flow discharging from 
Set the operation mode to "Fan", | air-outlet? ; 


ae isthere abnormal noise fromtan? | | | | [| 
3. (Check the Cooling operation) [Does the compressor tant normally? | [| | [ | | [| | 


Set the operation mode to Is there abnormal noise from the 
compressor or pipes? 


"Cooling" and start operation. 
isthe cool airfow comingout? | | | | ||| 1 


(Once you stopped operation you 
have to wait for 3 minutes to 

Is the air flow circulating 
adequately? 


restart due to the built in restart 
delay circuit functioning.) 
Does the thermostat work normally? 
(Confirm that compressor stops at 
high temperature setting, and 
restarts at low temperature setting.) 
Is the temperature difference correct 
between suction air and exhaust air? 
Is the voltage of power supply 
correct? (380 — 415V + 10%) 
Is the operating current correct? Raf gee ae ae dies | 
Is the operating pressure correct? ste opertnapessrecerece {| tt} 
Does the compressor start normally? [Does the compressor start normally?! | | | [| | | | 4 
is there abnormal sound? 
(Compressor, pipings) 
Is the warm air flow coming out? [is the warm airflow comingout? | [| | | | | | |_| 
Is the air flow circulating adequately? BAaRee eae 


Does the thermostat work normally? Ly 









1. Turn on the power. 
















































In this case, check 
every indoor unit 
operating 
simultaneously. 

Set the temperature to 
the lowest. 




















4. (Check for the heating operation) 
Set the operation mode to 
heating and start the operation. 
(Once you stopped operation, 
you have to wait for 3 minutes to 
restart due to the built-in restart 
delay circuit functioning.) 

(Note 1) 
























(Confirm that compressor stops at 
low temperature setting, and restarts 
at high temperature setting.) 






~40~ 














Operation Procedure 


In this case, check 
every indoor unit 
operating 
simultaneously. 

Set the temperature to 
the highest. 





J iF ii 


Is the temperature difference correct 

between suction air and exhaust air? 

Is the voltage of power supply 
correct? (380 ~ 415V + 10%) 

Is the operating current correct? ERRERERS 
is the operating pressure correct? SRS Ree ee 


Note: 1. When the outdoor temperature rises above 21°C, it will be forced into reverse operation to 
protect the units. 



















16-4. Guidelines 


16-4-1. Guideline for Suction/Discharge Temperature Difference 


(1) If the difference between the dry-bulb temperatures at the suction port and discharge port of the air 
conditioner is 10°C or more when operation has continued for at least 30 minutes in the "COOL" mode, 
the system is operating properly. (Operation at max. Hz) 


(2) If the difference between the dry-bulb temperatures at the suction port and discharge port of the air 
conditioner is 18°C or more when operation has continued for at least 30 minutes in the “HEAT” mode, 
the system is operating normally. (Operation at max. Hz) 


16-4-2. Guideline for Operating Current 


if the current is within +15% of the value given in the catalog in both the heating and cooling modes, the 
system is operating normally. (Cooling: operation at max. Hz; heating: operation at max. Hz) 
The current varies as follows depending on the operating conditions. 


(1) When the current is higher than the standard current 
e High indoor/outdoor temperatures 
* Poor heat dissipation of outdoor unit (during cooling) 


(2) When the current is lower than the standard current 
* Low indoor/outdoor temperatures 
« Gas leak (insufficient refrigerant) 


-~41-~ 


16-4-3. Guideline for Operating Pressure 
(1) The operating pressure level is generally as listed below. 


Table 16-3 
Coolin High pressure: 16 to 20 kg/cm*G Indoor: 18°C to 32°C 
¢ Low pressure: 3.5 to 5.5 kg/cm*G Outdoor: 25°C to 35°C 


Heatin High pressure: 15 to 21 kg/om?G Indoor: 15°C to 25°C 
g Low pressure: 3 to 4.5 kg/cm®G Outdoor: 5°C to 10°C 


Note: Cooling: Operation at max. Hz, Heating: Operation at max. Hz 













The above figures indicate the pressure levels established 15 minutes after operation starts up. (dry-bulb 
temperature °C) 


(2) Changes in high and low pressures caused by changes in operating conditions 


1) Cooling: 
« Rise in indoor temperature:Rise in high and low pressures 
¢ Drop in indoor temperature: Drop in high and low pressures 
e Rise in outdoor air temperature: Rise in high and low pressures 
* Drop in outdoor air temperature: Drop in high and low pressures 


2) Heating: 
« Rise in indoor temperature: Rise in high and low pressures 
* Drop in indoor temperature: Drop in high and low pressures 
e Rise in outdoor air temperature: Rise in high and low pressures 
* Drop in outdoor air temperature: Drop in high and low pressures 


16-4-4,. Flashing of Remote Controller’s Operation Lamp 


When the power is turned on, the remote controller's operation lamp will flash (ON for 0.5 sec. and OFF for 
0.5 sec.). This is not indicative of a failure or malfunction. 


16-4-5. PREHEAT/DEFROST Flashing 


In the following cases, "PREHEAT/DEFROST" will flash (at 4 second intervals) on the LCD display of the 
remote controller. This is not indicative of a failure or malfunction. 
Case: 1. When the combination of indoor units exceeds the capacity or when the code number entered 
by the capacity rank setting switch is incorrect (so that capacity is exceeded). 
2. When the indoor unit assigned by the command has been excluded by the operating mode 
selector switch. 


ae es 


17. SERVICING PROCEDURES 


The remote controller, multi-controller and outdoor unit are provided with check displays (remote controller) 
and LED displays (microprocessor control PC board) in order to check the operating conditions,and these 
displays identify the operating status. 


Given below are the methods which use this self-diagnosis function to identify what is malfunctioning or 
failing in the air conditioner. 


(1) Basically, trouble locations are identified by the check displays on the remote controller. 


(2) Details of trouble in the multi-controller or outdoor unit are indicated by the check LED displays on the 
multi-controller or interface control PC board. 


(3) Trouble in the multi-controller is also indicated on the interface PC board in the outdoor unit. This means 
that trouble in the multi-controller can be identified from the outdoor unit as well. 


Following Notes are shown in Fig. 17-1. 
Note 1: This indicates the codes for the trouble in the indoor unit. 
Note 2: This indicates the codes for the trouble in the heat source unit. 


Note 3: Code "04" indicates serial signal trouble. There is no code display on the remote controller for 
over capacity, but the "PREHEAT/DEFROST" display will flash. 
Note 4: Code"04" indicates. serial signal trouble. "21" is indicated for trouble in the non-inverter 


compressor or high pressure trouble. 
There is no code display on the remote controller for trouble in the power supply phase 
sequence but the "PREHEAT/DEFROST" display will flash. 


Remote 
controller 


Multi-Controller Multi-Controller 
(M/C) (WC) 


Outdoor unit 


interface Control Board a 


(I/F) 
Inverter Control Board 


(INV) 













Remote controller Check code display 


"99" (Note 1) (Note 2) (Note 3) "15" (Note 4) "1C"* 


Remote controller 
serial signal abnormality 


Indoor unit abnormality 


*TA sensor abnormality “OC 
*TC sensor abnormality "Od" 
«Water level abnormality “Ob” 
¢ Serial signal abnormality "04" 


M/C abnormality 


*Th (A) sensor abnormality "80" 
¢ Th (B) sensor abnormality “81° 
¢ Th (C) sensor abnormality "82" 
¢Th (D) sensor abnormality °83" 
¢ Th (X) sensor abnormality "84" 
Water level abnormality "Ob" 
¢ Serial signal abnormality "04" 








* Outdoor unit capacity “8B" 
is not detected 
* Over capacity "B9" 


* M/C PC board abnormality “8A” 


Outdoor unit abnormality 


¢ ThD1 sensor abnormality “A0" 
* ThD2 sensor abnormality. “A1* 
¢ThS sensor abnormality  *A2" 
«TO sensor abnormality “Ad” 
¢ TE sensor abnormality “A5" 


Outdoor unit abnormality 
« Power supply circuit abnormality °17" 










* G-Tr abnormality "14" « Discharge temperature "AG" 
* Compressor abnormality "1d" abnormality 
* Breakdown “1F" ¢ Suction temperature "AT" 
* High pressure SW operation abnormality 
* Pressure sensor abnormality “AA” 
« Low pressure gas leak “AE 
abnormality 
« Non-inverter compressor *AD" 
abnormality 


* High pressure abnormality "21° 

* Serial signal abnormality "04° 

¢ Power supply phase “AF* 
sequence abnormality 






¢ M/C abnormality 
Displays each code of M/C 
abnormality 

* Power supply circuit abnormality "17" 

* INV abnormality “AB" 















Fig. 17-1 


—~44— 


18. CHECK CODE DISPLAY SYSTEM CHART 







Remote controller check MCC check code dispia’ UF check code displa Inverter check code display 
code display (Display SW =1:E (Display SW = 20:E « CoD 
ExT 
Some serial signal Serial signal abnormality] ._, Serial signal abnormality 
abnormality between through MW/G ~ inverter between I/F and inverter 
ind 





r unit and inverter 








SOR abNGrMBITY 
| 14 | G-Tr abnormal 


| MiG abnormality 


17 | Inverter power circuit 
abnormalit 

| 18 | Not displayed 

| 19 | Not displayed 


1C | Other abnormalities of 
the outdoor unit. 






















<[ErAB | INV abnormalit 


E@0b | WC water overflow 
detection 
E@80 | Th (A) sensor 
* Jabnormality 
E@s81 | Th (B) sensor 
abnormali 
E@)82| Th (C) sensor 
abnormalit 
£@)83 | Th (D) sensor 
abnormality 
Th (X) sensor 
abnormali 
Outdoor unit capacity 
is not detected. 
@8A} M/C PC board 
abnormalit 


Eri17 ] Inverter power circuit 
abnormalit 


| 





Inverter compressor INV abnormality 
labnormalit 

Compressor break 
down 












High pressure switch 
operation 

















Power supply phase- 
sequence abnormality 





ErAF | Power supply phase- 
Sequence abnormality 

E@sag | Over capacity of M/C 
setting 


—>|1AC | M/C-1: Room A wrong wiring 
1bC10]M/c-1: Room B wrong wil 


setting (abnormality) or 
No selection in M/C 
(Normal) 










Pre-heating-Detrosting F: 





(132d | M/C-2: Room D wrong wiring 





: Identified location 
“~9", “«—": Signal flow @ : Number of M/C (1 or 2) 


-~45— 


19. IDENTIFICATION PROCEDURES 


When there is a sign of trouble, do not reset but press the “check switch" on the remote controller and check 


the check code. 
Whether the trouble location is in the indoor unit, multi-controller or outdoor unit can be identified by the 
check code. 


When the failure has been identified to be in the multi-controller or outdoor unit, its cause can be identified by 
the LEDs on the contro! PC board inside the electrical parts box of the Multi-controller or outdoor unit. The 
causes of multi-controller failure can also be identified from the outdoor unit. 


—46= 


(1) Press the check switch on the remote controller and check the check code. 
(See pages 49 to 56 for the checking method.) 


Trouble in indoor unit 
"oC" 
"Od" 


Failed TA sensor 
Failed TC sensor 
Incorrect water level 
Serial signal trouble 
Remote controller 
serial trouble 


"Ob* 
"04" 
"99" 


Trouble in outdoor unit 

"17° Defective current circuit 
"14" Defective G-Tr 

"1d" Defective compressor 
Breakdown 
High-pressure switch 
operation 


Refer to "Check codes and 
identification” on page 51 to 56. 


“4F° 
"21" 













Is the remote controller's NO 
operation lamp lighted? 


YES 


Is PREHEAT/DEFROST flashing 
on the remote controller's LCD 
display? 


NO 


Is a check code displayed on 
the remote controller? 


YES 


1C : Trouble in outdoor unit 


Check the check code indicated 
by the LED display on the 
interface control PC board of 
the outdoor unit. 











Refer to “Self-diagnosis 
function (outdoor unit)” 
on pages 57 to 63. 





ayy ae 






YES 


NO 


Indoor unit fan is 
not operating. 


< Trouble in indoor unit > 
Defective fan motor or 
fan motor circuit, etc. 






15 : Trouble in multi-controller 


Check the check code indicated 
by the LED display on the 
control PC board of.the multi- 
controller or the interface 
control PC board of the outdoor 
unit. : 












Refer to "Self-diagnosis function 
(multi-controller)" on pages 64 
and 66 or to “Self-diagnosis 
function (outdoor unit)" on 
pages 57 io 63. 



















Is the power AC 220 ~ 240V 
supplied between pin 1 and 2 of 
indoor unit terminal plate? 










< Indoor unit abnormality > 

¢ Indoor unit microprocessor 
is damaged. 

* Remote controller is damaged. 

* Wrong wiring between indoor 
unit and remote controller, 
and etc. 

Indoor unit trans is damaged. 














Is the capacity rank setting NO 
switch set correctly? 
YES 
Is the phase sequence of NO 


the power supply wiring correct? 





YES 


Indoor unit is not selected 
by the Mode Select Switch 





YES 


Normal 


Retry to select the 
operation mode. 





~48— 


ls the power supplied to 
the outdoor unit? 


< Total abnormality > 
* Inter-unit wiring connection 
damaged. 

(Wrong wiring, cut wire, 
damaged contact.) 


































< Multi-Controller abnormality > 
* Wrong-setting of the capacity rank setting 
switch. (over-capacity setting) 









< Outdoor unit abnormality > 
* Power source phase sequence abnormality 
(Check code "AF" is displayed on the LEDs 
of M/C and IF PC board.) 

Correct the phase sequence of the power 
supply wiring. 













< Indoor unit abnormality > 
* indoor unit is damaged. ; 
* Remote controlier is damaged. 





Normal 
Turn on the power. 


20.JUDGMENT OF MALFUNCTIONS WITH THE REMOTE 
CONTROLLER INDICATION 


20-1. Malfunction Check Display Operation 
Check: Pressing the check switch on, the compressor’s ON/OFF times and the check code are shown 
on the time part in display. 


Blinking "PREHEAT", "DEFROST" 
* The total capacity of the connected indoor units is too large. 
» The indoor unit is excepted previously by the operation mode selector switch. 
« Abnormal phase of power supply 


MODE FAN 
SELECT || SELECT 


CLOCK ON OFF TIME ADJUST FSELECT 


err 
bo euiis 


ON OFF CYCLE 





Blinking "Check" Reset switch 
By pressing the hole with a small pin, remote controller power is reset. 


ed AN hac (All the memories are cleared.) 


switch operation 


Check switch Displays check code by 1 second pressing. 
Resets the microprocessor of indoor unit by 5 seconds continuous pressing. 


Clears check code by 10 seconds continuous pressing. 
(The start-up number of compressor remains as itis.) 


Fig. 20-1 


“AQe 


20-2. How to Read the Malfunction Check Monitor Display 


By pressing CHECK key, times of No. 1 unit compressor-ON actuations as well as the check code 
information of 2 faults x 16 units are displayed on the time display area. (2 sec. per one phenomenon). 


Times of compressor - ON Example 1 
In case of the number of times of compressor actuations of 164. 


MALFUNCTION CHECK 





Display in 4 digits of hexadecimal notation. 16°x0 +162x0416 x 1044 = 164 


Display in 7 segments 





Mitte r IOC Ce 
Li thot tout (hb ttm cic Hexadecimal digit 
Oo 12 3 4 56 6 7 8 9 10 11 12 18 14 15 —— decimal digit 
Check code Information Example 2: 
In case of room temperature sensor of No. 1 unit in trouble. 
Unit number || Check code 
The first detected 


The last detected 


Example 3: 

For No. 15 unit, firsty room temperture sensor and secondly 
connecting cable between the indoor and outdoor units 
(serial signal) are in trouble. 


No display is made if there is no fault. 


Fig. 20-2 


LB 


20-3. The Check Code and the Judgment 


Table 20-1-A 
cose | Method of Judgment which Pars | How about the Conditions 
Judgment is performed on the ¢ — Inter-wire for ¢ Can't discriminate the signal 

























indoor/outdoor units. 
¢ TRS thermal switch . 
* Crank case heater. 
* Compressor case 
thermostat. 


due to a stop or wrong 
signal. 
¢ The serial signal has stopped 
because the case thermostat 
circuit was opened due to low 
temperature in the 
compressor Case. 


stop of the serial signal from 
outdoor unit. (Operation 
continuing) 























Judgment is performed on the 
presence of 220 — 240V for the 
indoor unit’s board connector 
PJ11 by using the photo coupler 














¢ Float switch movement. 

¢ Due to a bad connector 
contact, the photo coupler on 
the PC board becomes faulty, 


Drainage system. 
* Drain pipe is stuffed. 
¢ Drain pump. 

* Control system. 













(ICO6). : 
* Float switch movement : Adele be and the like. 
(Operation continuing) pler. 


(Outdoor unit stops fully.) 


« Judgment is performed on the 
room temperature sensor. 

* The resistance value is infinite or 

zero. (Operation continuing) 













Lead wire cut. 

* Loose connector due to a 
bad contact. 

¢ Wire cut in the sensor. 

« Short circuit caused by the 

insertion of the lead wire. 

Short circuit in the sensor. 


« Room temperature 
sensor (TA). 




















Lead wire cut. 

¢ Bad connector contact due to 
loose insertion. 

¢ Wire cut in the sensor. 

¢ Short circuit due to the 

insertion of lead wire. 

Short circuit in the sensor. 


Judgment is performed on the 
indoor heat exchanger sensor 
(TC). 

¢ The resistance value is infinite or 
zero (Operation continuing). 


Heat exchanger 
sensor (TC). 
















Table 20-1-A’ 


« Check up the inter-wire for wrong |* For inverter type, when 
wiring, disconnection, or bad aluminum radiation temperature 
contact. goes over the setting value, the 
* Check the current at TRS serial signal circuit will be open. 
thermostat. « By making the serial signal circuit 
« Incase that terminal voltage is of the multi-controller, etc., an 
applied at the crank case heater open circuit, the type that forms a 
connector, check for crank case protective circuit. 
heater. 
« Inthe case of no terminal voltage 
at the crank case heater, check 
for compressor case thermostat. 


How about the Operation 


« Although the fan is 
carrying on the operation, 
cooling or heating 
operation does not work 
because outdoor unit stops. 
(In normal operation, the 
LED for the serial signa! 
will blink.) 






























































* There is no 220 — 240V for PJ11 
connector. 

* Due to the common use of the 

PC board for various models, this 

code may appear if the model 

without drain pump.is connected. 


¢ Drainage pipe repair. 
« Drain pump repair. 

* Check the connector contact 
points. 

Check on the PC board. 


¢ Indoor unit is operating, 
but outdoor unit stops. 






















Check the resistance value of TA 
sensor. 

¢ if there are any peculiar defects, 

replace. 


Cooling operation carries 
on with thermostat at off 
position. 

* Heating operation carries 
on with thermostat at on 

position. 




















Check the resistance value on 
the TC sensor. 

* If there are any peculiar defects, 

replace. 


For cooling operation, 
freeze prevention control 
does not work. 

* For heating operation, 
outdoor unit carries on its 
work intermittently under 
the high temperature 
release control. 

* For cooling operation, 
freeze prevention contro! 
does not work. 

¢ For heating operation, 
outdoor unit carries on its 
work intermittently under 
the high temperature 

release control. 


















abo. 


creek | Method of Judgment Le How about the Conditions 



























Judgment is performed on the 
over-current protection circuit or 
the insufficient voltage protection 
circuit. (Short time) 

Full stop. 


Judgment is performed on the 
temperature sensor 

(ThA, B, C, D). 

The resistance value is infinite or 
zero. 

Full stop. 


At the stop of compressor, 
operation judgment is performed 
when the current comes into the 
current sensor circuit. 

Full stop. 


Judgment is performed on the 
(LED 50) red light on the outdoor 
inverter control board. 
(MCC-1521). 

Full stop. 

Judgment on the abnormality of 
interface board. 

Full stop. 


Judgment is performed on the 
over-current protection circuit 
or the insufficient voltage 
protection circuit. (Short time) 
Full stop. 


Table 20-1-B 







Power supply. ° 
* Wiring. 
* Fuses. 
¢ Giant transistor. 
* Base drive board. 
* Smoothing 
capacitor. 
¢ Rectifier. 
* Diode. 
Compressor. 


Under voltage protection 
circuit functioning, due to a 
voltage reduction. 
Over-current protection 
circuit functioning. 
















Temperature sensor 
(ThA, B, C, D). 


Operation stops due to a 
malfunction in the multi- 
controller. 




















* Assembly of 
PC board. 


¢ Due to an abnormality 
detected in the current, 
operation stops. 













































14. 
° 1d. 
* 21 items. 
¢ ThD1, ThD2. 
Ths sensor. 
¢« Pressure sensor. 
* Low pressure switch. 


Under voltage protection 

Circuit functioning, due to 

voltage reduction. 

* -Over-current protection 
circuit functioning. 

* High pressure switch 
functioning. 

* Lead wire cut. 

¢ Bad connector contact. 

* Pressure abnormal. 

« Loose or cut in sensor 
connectors. 

¢ Discharge air temperature 

abnormal. 













Power supply. Under voltage protection 
* Wiring. Circuit functioning, due to 
* Crank case heater. voltage reduction. 


¢ Over-current protection 


Compressor. 
: circuit functioning. 





~53-— 


Tabie 20-1-B’ 


How about the Operation Method of Diagnosis 


¢ Operation stops due to Check the power supply. 
inverter tripping. Repair the disconnection, loose 
Restart does not work. contact or cut of wires, fuses or 
reactors. 
Replace the defective parts. 
Check the giant transistor, base 
drive, smoothing capacitor, 
rectification diode, compressor 
and other 
connections. 


Operation stops. Check the operation of the PC 
Restart does not work. board. 


Operation stops Check the contact condition of 

Restart does not work. multi-controlier temperature 
sensor connector and its 
specifications. 


Operation stops. Check 14. 

Restart does not work. Check 1d. 
Check 21 items. 
Check every sensor resistance. If 
there are faults of specifications, 
replace. 
Capillary tube is stuffed up. 
Check sensor resistance. 


* Operation stops. Check the power supply 

* Restart does not work. Repair the disconnection, loose 
contacts and cut in wiring and 
power relay. 





~54- 


Table 20-1-C 


ies Method of Judgment wien Pats How about the Conditions 


¢ Judgment is performed when the |* Power supply. * Under voltage protection 
larger AC current thanithe rated j* Wiring. circuit functioning, because of 
one continuously comes into the j|* Crank case heater. voltage reduction. 
current sensor circuit. ¢« Compressor. * Over-current protection 

Full stop. circuit functioning. 

* Malfunctioning of current 

detection circuit. 

















































Operating condition. 

¢ High pressure 
switch. 

¢ inner over-load relay. 

* Indoor fan motor 
capacitors. 

* TC, TL sensor PC 

board assembly. 


High pressure switch 
functioning by overload 
operation. 


Judgment is performed on the 
continuous time for the high 
pressure switch functioning. 
Full stop. 
























* Can't discriminate the signal 
due to a stop or wrong 
signal. 


Wrong wiring between the 
remote control and the indoor 
units, or a selection mistake. 
(Stop of operation) 


¢ Inter-wiring between 
remote controller 
and _ indoor units. 

Unit No. setting. 






—~55- 


Table 20-1-C’ 


* Check power circuit. 
* Check the causes of abnormal 
loading. 
Check PC board works. 


How about the Operation 


* Operation stops. 
Restart does not work. 





















Check the causes of abnormal * Both indoor and outdoor units. 
loading. If there are peculiar 
defects, replace. 

*« Check the TC, TL sensor 

resistance. 


Check PC board works in. 


Operation stops. 
Restart does not work. 























Cut, bad connection of * Terminal A, B, C. 
inter-wiring. 
* Double setting of indoor unit 


No. 1. 


For wrong wiring,operation 
does not start. 

¢ Forwrong setting, 
operation starts depending 
on the case. 









a 5Ee 


20-4. Malfunction Judgment with the Self-Diagnostic Function 


of the Outdoor Unit 
The combination of two display selector switches (SW1, SW2) and the LED (LD1 ~ LD8) indicate the 
contents below. 


Inverter con- 


Interface control board tral Board 


fo yt 


| Demand control | 


| interface board edd 
a=) 


head ead pet er a 


Paes) 


Compressor 


Multi-Control- Multi-Control- Compressor 
ler (1) ler (2) 


Inverter 





Fig. 20-3 Electric parts location 


7 segmented LED 







Parts location 


Display 
selector 







LD71 L072 LD73 LD74 


ors 
o 


. 
Dll] ANZ) 
7 ’ 


Display selector 1~~--* Display selector 2 


FAsws 

FAsws 
Push switch SW3 

Fig. 20-4 Interface control board 


20-4-1. If the Selector Switch SW1 on Outdoor Unit Interface Board is 


Set at "0" 


Sending/receiving serial signals and operating status are displayed. Following contents are indicated by 
switching the display selector SW2. 


EF = 


Table 20-2 

















Display 
selector 


7 Segmented LED Display 


LD71 LD72 LD73 LD74 
Between . Between Non-inverter 
M/C (1) M/C (2) Between compressor 

















Sending/receiving status of serial , No . 
i pending sending/recei Abnormal [E] 
only [S] ving [-] 
Sending and 






receiving [O] 
Heating [H], Simultaneous 
cooling/heating [HC], 
Cooling [C], Stop [-] 


instruction |Heating frequency [00 -1F] | Cooling frequency [00 — 1F] 
frequency |(See table 20-3.) (See table 20-3.) 


Heating [H], Cooling [OC], 
Simultaneous heating [Hc], 
Defrost [Jo], Simultaneous 
















Operating instruction 
from M/C (1) 










Outdoor unit operating 






Heating [H], Simultaneous 
cooling/heating [HC], 
Cooling [C], Stop [-] 


instruction |Heating frequency [00 -1F] | Cooling frequency [00 —1F] 

frequency |(See table 20-3.) (See table 20-3.) 

Normal [C] Operating 
frequency 
{0 — F] (See 

Abnormal [E] | table 20-4.) 

Instruction 
frequency 


0 — F] (See 
abnonranE) eae 






















Power supply frequency 





—58- 


Table 20-3 Display code conversion table 


Display 

Frequency 

conversion 10.0 | 13.0 | 16.2} 19.3 | 22.4 28.6 | 31.7 | 34.8 | 37.9 | 41.0 
value (Hz) 

code 

Frequency 

conversion | 44.1 | 47.2 68.9 | 72.0 | 75.1 | 78.2 | 81.3 | 84.4187.5 | 90.0 
value (Hz) 


Table 20-4 Display code conversion table 
Display 
code 
Frequency 
conversion 30.5 | 38.1 | 42.0 | 45.8 | 53.4 | 61.0 | 68.7 | 76.3 | 83.9 103.0 | 110.6 | 121.6 
value (Hz) 


20-4-2. If the Selector Switch SW1 on Outdoor Unit Interface Board is 


Set at "2" 
Malfunction information is displayed when display selector switch SW2 is set at "0". See the check code. 





























Table 20-5 


Display 7 segmented LED display 
Selector SW 2 LD71 LD72 LD73 LD74 




























Check code ‘ 
display nea a If Check code: 
Outdoor unit For the contents, see table 20-6. 


MIC (1), M/C (2) wee) El 


20-4-3. The Check Code Judged by Outdoor Unit and Multi-Controller 
Table 20-6 


Check code Judgment 


Outdoor unit 


ThD2 sensor abnormality 
























Defects of sensor, wire cut, short circuit, connectors off 


-59- 





Check code 








Discharge air temperature abnormality (detected by ThD1 and ThD2 sensor) 
Refrigerant under-charge, gas leakage, over-loading operating condition 
* PMV1 malfunction (Defect of valve body, defects of coils, connectors off, wire cut.) 
* PMV1 stuffed up 
(In cooling, simultaneous cooling operation) 
* $V13 malfunction 
* PMV2 malfunction (Defect of valve body, defects of coils, connectors off, wire cut, 
PC board defects) 
* PMV (A-D) in M/C malfunction 
« SVS (A—D) in M/C malfunction 
* Defect of expansion valve, expansion valve stuffed up 
(In heating, simultaneous heating operation) 
* 4-way valve malfunction 
* SV14 malfunction (Defect of valve body, defects of coils, connectors off, wire cut, 
PC boards’ defects) 
* $V16 malfunction 
¢ PMV (A-—D) in M/C malfunction 
Defect of expansion valve, expansion valve stuffed up 



















Suction temperature abnormality (detected by ThS sensor) 
Refrigerant under-charge, gas leakage, over-loading operating condition 










Pressure sensor abnormality 
Defects of pressure sensor, wire cut, connectors off, pressure intake capillary tube 
stuffed up 


Low pressure gas leakage abnormal (Low pressure switch functioning) 

Gas leakage, refrigerant under-change : 

(In cooling, simultaneous cooling operation) 

* PMV(A — D) in M/C matfunction (Defect of valve body, defects of coils, connectors 
off, wire cut, PC board defects.) 

* SVS (A-D) in M/C malfunction 

* Defect of expansion valve, expansion valve stuffed up 

(In heating, simultaneous heating operation) 

4-way valve malfunction 

* SV14 malfunction (Defect of valve body, defects of coils, connectors off, wire cut, 
PC board defects) 

* $V16 malfunction 

















Compressor abnormality (High pressure switch (63H2), Inner over-load relay (49Co), 

Over-load relay (51C2) in non-inverter compressor side functioning) 

(1) High pressure switch (63H2) malfunction 

* Over-loading operating condition 

* Indoor and outdoor fan motors malfunction 
(Defects of fan motors and capacitors, wire cut, connectors off, PC boards’ defects) 

* $V13 malfunction (cooling) . 

* PMV2 malfunction (simultaneous cooling) (Defects of valve body, defects of coils, 
connectors off, PC boards’ defects) 

* SVD(A—-D)inM/C maifunction (heating, simultaneous heating) 

* PMV (A—D) in M/C malfunction 









-60— 





Check code 














(2) Inner over-load relay (49C2) malfunction 

* Gas leakage, refrigerant under-charge, over-loading operating condition 
(3) Over-load relay (51C2) malfunction 

* Over-loading operating condition, compressor liquid accumulation, compressor 
locked up, mis-phase, crank case heater defects (wire cut, connectors off) 





High pressure abnormality (High pressure switch (63H2), Inner over-load relay (49C1), 
malfunction, detected by pressure sensor) 
* High pressure switch (63H; malfunction) 
Judgment of ErAD (1). Same judgment as high pressure switch functioning. 


Er21 
« Inner over-load relay (49C1) functioning 
Gas leakage, refrigerant under charge, over-loading operating condition 
Serial signal abnormality (between outdoor unit interface control board and inverter control 


Er04 board.) 
Connectors off, wire cut, wrong wiring, bad contacts 
Out of phase in power supply 
ErAF : : 
Phase mis-matching of power cable 


Er? Inverter (INV) current circuit abnormality 
Inverter PC board malfunction 


Inverter (INV) abnormality 
ErAB 























(1) Giant transistor abnormality (displays check code "14" on remote controller) 
* Short voltage protection circuit functioning due to voltage reduction. 

Check the power supply, wiring, fuses, reactors off, loose or cut. 
« Check the over-current protection circuit. 

Defects of giant transistor base drive, smoothing capacitors, current regulation 
diodes, 

inverter compressor grounding. 
(2) Inverter compressor abnormality (displays check code "1d" on remote controller) 
* Short voltage protection circuit functioning due to voltage reduction 

Check the power supply, power relay off, loose or cut 
* Over-current protection circuit functioning. 

Compressor liquid accumulation, compressor locked up, mis-phase, 

crank case heater defects (wire cut, connectors off) 
(3) Break-down of inverter compressor (displays check code "1F" on remote controller) 
* Current increasing by voltage reduction (Check the power supply.) 
* Current increasing by over-loading operation 
e Wrong operation by malfunction of current detection circuit on inverter PC board. 
(4) High pressure abnormality (High pressure switch (63H1), Inner over-load relay 
(49C1) malfunction.) 
« High pressure switch (63H) malfunction 

Judgment of ErAd (1). Same judgment as high pressure switch functioning. 

* Inner over-load relay (49C1) functioning 
Gas leakage, refrigerant under-charge, over-loading operating condition. 



















Gre 





Multi-controller 


Th (A) sensor abnormality 
Th (B) sensor abnormality 
E182 : 
E282 Th (C) sensor abnormality 
E183 : 
E283 Th (D) sensor abnormality 
E184 ; 
£284 Th (X) sensor abnormality 


E10b Water level abnormality (Float switch functioning) 
Drain heater defects (wire cut, connectors off) 
Float switch defects (wire cut, connectors off) 


Check code : Judgment 









Defects of sensors, wire cut, short circuit, connectors off 







mmimm 
yal = 
© © 10 o 
analoo 












Impossible discrimination of outdoor unit capacities (Displayed when the outdoor unit : 
Capacity was unknown.) 
¢ Defects of multi-controller control board 
¢ Defects of interface board of outdoor unit 
* Wrong wiring, wire cut or bad connection between multi-controller and outdoor units 
Over-capacity 
¢ Displayed when total capacity of each indoor unit exceeds 1.35 times of outdoor unit 
capacity 


E18A M/C board abnormality 
E28A * Displayed when the multi-controller control board does not work normally. 

















m Mm mm m 
npn no = nr 
oO oO oo oO 
oO © oo Oo 





2655: 


20-4-4. If the Selector Switch SW1 on Outdoor Unit Interface Board is Set at "3" 
Capacity rank setting is displayed. Following contents are indicated by switching the display selector Swe. 


Table 20-7 


7 Segmented LED Display 










Display 
Selector 






ore aa Outdoor unit horse power 8 HP | ss BHPIS, 10HPIA) 10 HP [A] 


— the code number of indoor unit 


Capacity rank of FRoomB | [b] | registered to M/C 


indoor unit 






Code | Capacity | Code | Capacity 


Room D 


Capacity rank of |RoomA | tal | 2 | - | 
indoor unit |Roome | to | 3 | 130 | 
oom [ta | 8 | 260 







areas 








20-4-5. If the Selector Switch SW1 on Outdoor Unit Interface Board is Set at "4" 
Sensor data is displayed. By switching the SW2, the contents are shown in table 20-8. 


Table 20-8 


Display 7 Segmented 
Selector LED Display 
LD71 


Pressure sensor data 


ThD1 sensor data 
Data [00 — FO] 


ThD2 sensor data See the conversion table 

ThS sensor data a (Table 20-14, 20-15 and 20-16) 
TE sensor data on pages 59. 

TO sensor data 





20-4-6. If the Selector Switch SW1 on Outdoor Unit Interface Board is Set at "1" 


PMV opening information is displayed. Following contents are indicated by switching the display selector 
Swe. 
















Table 20-9 
Display 
Selector 


7 Segmented LED Display 
sw2 LD71 LD72 LD73 LD74 


[2 |pavtopening |) | tt Data f00- Foy 


[1] 
See the conversion table 
PMV2 opening [2] 


(Table 20-12) on pages 67 and 
20-5. Malfunction Judgment with the Self-Diagnostic Function 


68 
of the Multi-Controller 


Completely close [00] 
Fully open [FO] 

The combination of the display switches (SW) and four segments LED (LD101 — LD104) indicate the 

contents below. 











7 segmented LED 


LD102 LD104 
L0101 D103 


ear daa 
Nabe ZL LAISLLAT, [ Z) 
Room A Room 4 
Room B Room D 
Display selector switches 


Fig. 20-5 Control board 


-~64—- 


Table 20-10-A 


7 Segmented LED Display 
) aa * 
ml im Lt 


ar Receiving | Sending to Sending to | Receiving | Receiving 
Seva! signal from room B room A from from 
condition room B room A outdoors 


1. |Check code Check code (Normal [00}) For the contents of check code, see page 62. 


Frequency instruc- 
tions to the out- 
door unit. 


Frequency instruction of heating [00 — if] 
See table 20-3 “Display code conversion table" on page 59. 


: ; Room B Room B Room A 
el rome When oil | When When 

si i° retrieval controlling controlling 
contro! superheat superheat 


Defrosting display Displays defrost [dF] functioning 


MWC operatin 

O : 4 moder” ? Outdoor unit operating mode: Heating [H-], Cooling [-C] Simultaneous Heating [Hc] 

peration mode | Heating [H-] Simultaneous Cooling [hC}j, Stop {--], Defrost [J-] 
Cooling: [C-] * 

Restantmer | — | — | 

Indicates the indoor units (A, b, C, d) to be checked. 

7 |PMV(A) opening | [P] | IA 

PMV(B) opening YP | tb Data: [00 —- FO] Opening 


Display in hexadecimal 

ia 

in] | Al 

[THB sensor data_| [hl | [ol | 

[Th sensor data | fh] | Icl_| si table 20-13 "ThA, B, C, D and X sensor data” on page 69. 
ma | 

Tax sensor data_| tml | HL | 


* and Simultaneous Cooling/Heating [HC], Defrost [J-] 





Note: 
For 7 segmented display, the way to read the indication differs depending on the settings of display. 


Table 20-11 


Display 
banal sai to How to Indicate 
Setting 


Indicates at the 
0,3 part lighting 
x1 among seven 
filaments 
Other than | Indication 
above marks 


Note: x1 
If the display selector switch is set to "3", only the mark of defrost "dF" will be displayed. 





oy 


Table 20-10-A’ 


Serial signal 
condition 


Check code 


Frequency instruc- 
tions to the out- 
door unit. 

Oil retrieval 
Superheat 

contro] 

Defrosting display 


«| Operation mode 


ee 


PMV(A) opening 
| 8 | PMV(B) opening 
| 9 }PMV(C) opening 
PMV(D) opening 

11. |ThA sensor data 
| 12 | ThB sensor data 

Tho data aia 

| 13 _[ThC sensor data | See table 20-13 "ThA, B, C, D and X sensor data” on page 69. 
ThD sensor data 
PAB ThX sensor data 









7 Segmented LED Display 

















re | tf | mM | | & 
olelea ol aele 


Receiving | Sending to Sending to | Receiving | Sending to 
from room D room C from outdoors 
room D room C 


Check code (Normal [00]) ------ For the contents of check code, see page 51 ~ 55. 












Frequency instruction of cooling [00-1F] 
See table 20-3 “Code conversion table” on page 59. 














Room D 
When oil 
retrieval 
















controlling | retrieval 


superheat 
Displays defrost [dF] functioning 










Outdoor unit operating mode: Heating [H-], Cooling |-C] Simultaneous Heating [Hc] 
Simultaneous Cooling [hC], Stop [-], Defrost [U-] 






Normal [0], Restart timer counting [ 1} 









Displays a part of wrong wiring [A, b, C, d] 
[A] Wrong wiring in room A [b] Wrong wiring in room B 
{C] Wrong wiring in room © [d] Wrong wiring in room D 











Data: [00 — FO] Opening 
Display in hexadecimal 












~66-— 


20-6. PMV Opening Degree, Temperature Sensor and Pressure Sensor 
Data Code Display Conversion Table 


20-6-1. PMV (Electronic Flow Control Valve) Opening Degree Data 


PMV (A), (B); (C).(D) ii nseetcseiasisasvecenrtoavcocetcantedccene Multi-controller 

PMV A Qos iiclecese thes citocieiesaliciatiiecuiieeteeths Outdoor unit 

PMV opening degree... eescseeceseeeeeccersaseenses 0 to 240 pulses 

DONO): cvicsesavgsacasiveasvestecustecsuveepsiiacasnscesstbsutiettanesesnieee Fully closed 

FO (240) ...........0008 esd ve le gabsitcd eas Pea ioteavasceandsseecadeccentese Fully open 
Table 20-12 





Opening 
Display degree 
(pulse 


Opening Opening 
degree degree 
(pulse) (pulse) 


Opening 
degree 
(pulse) 










CS 
— 


fo) 
ES 


oa 






11 


2 
QO 


Oo 
Th 
ol 
o 


°o 
> 


1 






FP 





= = 
| b 
NM IN nN 


fo | -= 
—_ 
oO 


= 
© 








Table 20-13 ThA, B, C, D and X sensor data 





i Pressure 
splay (kg/cm?) 
[| te | 1.000 | 
| 25 | 2.000 | 
| 2p | 3.000 | 
| 38 | 5.000 | 


4A 7.000 

| 68 | 9.000 _| 
| sc | 9.500 _| 
| 60 | 10.000 
| 63 | 10500 _ 



















Note: 










|_8c__| 19.000 _| 













2 Tempera- 
Dispiey dphayela 
70 


we 
ae 

| 7 | 14 

| 7c | 15.000 _| 
| 80 | 16.000 _ 
| 84 

| 8 

| 0 | 

| 4 


74 
78 
7C 
84 
88 
8C 
94 


Table 20-14 Pressure sensor data 





pressure 

(kg/em?) 
11.000 
| 6B | 14.500 
|e | 12,000 _| 
12.500 
13.000 















Pressure 
(kg/cm?) 


Display 


9A 
Al 
A5 
| Bp | 


These are typical samples. it is possible to display the middle value code. 


=§9= 


Table 20-15 ThD1, 2 sensor data 


, Tempera- 


7C 

. 
|_90 | 95.000 _| 
AB 





Tempera- 
ture (°C) 


130.000 








| 115.000 | 
|_co__| 125.000 | 


Note: These are the typical samples. It is possible to display middle value code. 
Displays "00" when a connector is disconnected or a wire is cut in the sensor. 


B2 
0 





Table 20-16 ThS, TE, TO sensor data 


Tempera- 
ture (°C) 





Note: There are the typical samples. It is possible to display middle value code. 
Displays "00" when a connector is disconnected or a wire is cut in the sensor. 


296% 


21.0THERS 


21-1. Microprocessor System Diagram and the Time Required to Judge 
the Malfunction 








Multi-controller 
(M/C 1) 






Inverter 
microprocessor 
INV 





Multi-controller 


(M/C 2) 






Remote controller 






A few sec. 1 min. 1 min. 


Fig. 21-1 


The time to display the indication on the remote controller. 
Serial signal abnormalities: 
(1) Between the I/F and the INV 
a few seconds + one minute + one minute + one minute = more than three minutes 


(2) M/C and the I/F 
a few seconds + one minute + one minute = more than two minutes 


(3) Indoor unit and the M/C 
a few seconds + one minute = more than one minute 


(4) The remote control and indoor units 
a few seconds 


INV abnormalities: 
a little more than three minutes 


VF abnormalities: 
a little more than two minutes 


M/C and indoor unit microprocessor abnormalities: 
a little more than one minutes 


ada 


...Relay drive circuit, power for the PMV 


...Electronic circuit power 


t Power Voltage of the 


ircul 





Measure the voltage between the GND and the checkpoints shown in Fig. 21-2. 


Multi-Controller Control Board 


There are two types of control circuit power voltages, 5V and 12V. (Common GND). 
When there is no voltage, take off PJ16 (in condition without loading), measure the transformer secondary 


voltage. When approximately 18 — 20V AC (at 240V) is detected, the relay board is defective, otherwise, 


21-2. A Check of the Control C 
transformer defects. 


| PNV (A) [_ PNV eae ee PMV (Cc PMV | 
rhs {J 
CONF 


mde ages oe 


iz te ARSS imal If cee chy tity 285 


ie fate | 6250. | [ 25004 
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i 

Ol Iw e.4,2,7 


tcist : iess2 
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ays 
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9 tera 8 


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ah anos9s|dtg 
uy 


uy SEseo FLOAT 
Ete 
Ete 






ge - (3 






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DCBACOM 


% seis 16 


age eres 
at? 62304 
Preity 


9 tease 6 








aA ae ihe 4HCS95/q 

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Fig. 21-2 
~72= 





To 2 enn 


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| 62304 | 62304 = 62304 ior th 
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sar m ” = <3 ry xe 


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3507 @ e 3507 4 a 3507 @ i 3507 


nu 
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- 


<4 


He 
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SKi01 
Fei01 


PJ24 


21-3. A Check of the Control Circuit Power Voltage of the Outdoor 


Interface Board 


There are two types of control circuit power voltages, 5V and 12V. (Common GND). 

ON 2 ctrari cd uestowh ates ee haere Aceh eieateh Vinca nuat tok: Electronic circuit power 

DOM sstszitsantordeisavedusaetoseelatn hearse iene exaeaas Relay drive circuit, power for the PMV 
Measure the voltage between the GND and the checkpoints shown in Fig. 21-3. 
When there is no voltage, take off PJ8 (in condition without loading), measure the transformer secondary 
voltage. When approximately 18 — 20V AC (at 240V) is detected, the relay board is defective, otherwise, 
transformer defects. 


Oz PUY (2) puv (1) -U sPJ1 24 ro PJ6 3 70,0 te vot ‘UO Thaz LF 
| Ga F sa 
Sg HE io (as aac oe ie ye e' [+ 2f ? 


& 






AS 


Gnd 







PJ21 RIS9 ai i 


E 
“a wii 
2 ae | ee 
= G =-ws = 
$ R158 Coat $ id 
= 
z ae EI . 
3 
2 RIS? Coe A 
nT EL 5 js 
PJ20 : 
: 






ELAS ZtAS TITAS SAS 


nN 
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R1iS2 
Te aaee a 
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7 
R15) 


Wr C91 
gp 28 sisting: =f 


2 r 
= R327 
5 R150 og, , Re 2s Le wm, am, 
4 Peace ig gz BTSteReete oft rr 5 ; 
= kr Ee Rize a” = 
ZI a R133 
R149 3151 ! ~ 
AAR CBP 5 a2 mis? Fs] ca? 
ss one R132 wed 
th Fi. RE oth SR Ot 
aggy F873 


a site = 8h 388 
Be dz aaa 


fee PS Be 


bs 8 ire Sei sad “acl! 
= cg ose 2c a a 


fEt 


3 |38 
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Razo Tmax K50 
Fig. 21-3 


~73- 


21-4. 220 — 240V System Diagram 


Indoor unit power supply 


_. OOOO © ©. LOO OO O_, 


aS Controller 


SVS(A) 
(SVS(B)) 
Serial signal 1c114 ss 
CSVS(C)) 
CSVD(A)) 
CSVDiB)) 


1C120 


Transformer 


Internal reset 





Serial signal 


2 RS a Om a ERE Se Hes mE OP ne ee ee = ce oo me oo eee oe 


Fig. 21-4 Multi-controller 


Pet 7. ee 


SaaS ea an ae i a a ct ageless este eal te ot 


pe eae ge ge ee 


Power supply 
3 G) 380-415v  50Hz A/C 220-240V A/C 220-240V 


66006606060. 


Serial signa! Serial signal 





Crank case heater 1¢91 €m | 


a 
©) 


1088 Cx | For Inverter cooling 


sm ( 4—way valve >) : 


Spark killer 


TRIAC 71 (m) 





Fig. 21-5 Outdoor unit 


75 


22,.REMOTE CONTROLLER DISCRIMINATION FUNCTION, 
OUTDOOR UNIT DISCRIMINATION FUNCTION 


For each of one outdoor unit system, it is possible; 
* To search for connected outdoor unit from the remote controller. 
* To search for connected remote controllers from the outdoor unit. 


22-1. Search from the Remote Controller 


Turn on the power. 


Remove the remote controller cover 
(or turn over the remote controller) 


Select "Fan” mode, and short circuit the 
timer. 
(Short circuit the timer by a short pin.) 











The 2 way valve for the bypass of outdoor 
unit, striking with a grinding noise every 2 

seconds, opens and closes repeatedly (for 
5 minutes). 


Stop shorting the remote control timer. 
(Remove the timer short pin.) 


22-2. Search from Outdoor Unit 









Turn on the power. 


Set the display select rotary switch No. 1 
on the interface board in outdoor unit to 
"3", “5" or "Ts 


Press the push switch SW3 on the board 
for more than two seconds. 


“DEFROSTING" indication will start 


blinking. 


Set the display select rotary switch 
No. 1 to "0". 





The remote controller's "PREHEATING", | 


&1 : Figure of cover off. 





*1 


Procedures 
Fix short-pin with an adhesive tape 
Check the connected 


outdoor unit. 


End 


| Procedures 


%*2 Depending on the setting of "3", "5" and "7", the 
judgement on the remote control can be done in 
the following division. 

in the case of "3": All systems 
In the case of "5°: Multi-controller M/C (1) system 
In the case of "7": Multi-controller M/C (2) system 


(The lay-out diagram on the interface board) 
7 segmented LED 


Display 
selector 






Parts location 






Check 
th ted 
enc BIBIGIEY 





controllers | 


Push switch SW3 


End 


~76— 


23.CHECK FOR REFRIGERANT PIPING AND INTER-UNIT WIRING 
CONNECTION 


The units have a function to check the wrong connection of refrigerant piping and inter-unit wiring between 

multi-controller and indoor units. Conduct the check at the test run as follows. This function does not work in 

the cases listed below. 

. The capacity of indoor units set to "0". (Select the correct capacity with the switches on the 
multi-controller control board.) 

2. Remote controller of indoor unit did not set to “cooling” (Select "cooling") 

3. Out of phase in inter-unit wiring, or wrong connection (Connect the wire to correct terminal 

number) 










(The lay-out diagram for the switch on the interface board) 


ry . 
AY fe 
9 


Open the electrical parts box 
in the outdoor unit. 


Set up the operation frequencies. 


oreo 




























3 Frequency 











setting Depending on the room and ambient 
temperatures, set the rotary switch (display 
switch) on the interface (I/F) board in the 
outdoor unit to either "9" or “10”. 
4 Set up the Set all the remote controllers of indoor 7 
operation units connected to the outdoor unit to SELES RE ERE LES % When the pressure tall down due 
cooling operation, and press the operation Ms ey ore Py Pay tow indoor and outdoor 
button. (No need for temperature setting) e.. rerigerant gas, the operation ol 
2 the compressor will be stopped 
: pepereeperaes 
and th wil to A 
5 Start the Press the push SW No.3 on the I/F board. § i Bul LED on UF board continues 
check (More than two seconds) es blinking as itis. 
(Eight LEDs on the /F board in outdoor 
unit will simultaneously start to blink.) 43 
(Start to check with indoor unit A and carry Mebaribabarchbe 
on in turn. During the check, all of the protective device tunctioning 
indoor unit's remote controllers display a1.4. 3: 
“PREHEAT”, "DEFROST blinking, and the (7 segmented LED indication on the VF board.) 
indoor unit fan keeps to stop operation.) AGacacs TE 
iay Svei 
ad A Ee 
6 Endofthe | After completion of the operation lamp on = = 
check the remote controller goes off. As for the ilalele -_- ETS 


outdoor unit, the compressor stops the 
operation and the seven segmented LEDs 
on the I/F board also stop blinking. 


(Example) if there is no wrong connection in M/C (1) 
system, “G" is displayed. 

When there are wrong connections in unit C and D, 
"C” and “d" will be alternately displayed every two 
seconds. 





Check, a wrong wiring or not. In the case 
of wrong wiring, 7 segmented LEDs 
indicate the defective indoor unit. You can 
also use 7 segmented LEDs on the multi- 
controller for this check. It takes max. 10 
minutes for the check. But it varies depend- 
ing on room and ambient air tempera- 
ture. 


7 Judgement 


(The two digit, 7 segmented LED display on 
the multi-controller board) 


1i9e 
rei 





BG Displays the unit under | Displays the unit wth 
checking wrong connection 
Sg 7 segmented LED ¥ 
cr c cr 
ye ee aes 


(Example) When there are wrong connections 
in unit C and D, "C" and “a” will be alternately 
~ displayed every two seconds. 
If there are wrong connections in all of the unit A, B, 
C and D, all the symbols are displayed every two seconds. 












8 Reset When the check is completed, make sure 
to return the rotary SW on the V/F board to 
"0": 

(If itis not returned to “0”, the wrang con- 
nection check will finish as itis, and it won't 
be possible to do the cooling or the heating 


operation.) 


Note: When there are some wrong connections, repair them after 
turning off the power and perform a check again. 


i g eee 


- 294,.REMOVAL.METHOD 


24-1. Outdoor Unit (MAR-F81HTM8, F101HTM8) 


24-1-1. Replacement and Checking Procedures of the Electrical Parts 


Danger: * The electrolytic capacitors in the electrical parts assembly are charged to 600 volts D.C. Before 
servicing, turn off the power supply and allow at least 20 minutes for the capacitors discharging 
to a safe level of 5 volts D.C. or less to avoid possible hazard. 

‘. Test with a D.C. volt meter as shown below. 





Fig. 24-1 


» Never short the capacitor terminals with any metal implement for discharging. Personal injury or 
equipment damage may result. 
(1) Remove the front panel (left side). (M6 x 4, M4 x 1) 


(2) Remove the inverter cover. (M4 x 4) 


24-1-2. Replacement Procedures of the Propeller Fan and Fan Motor 
(1) Remove the fan guard. (M4 x 2, 2 locations) 


(2) Loosen the tightening screws of the propeller fan with a hexagonal wrench and remove the propeller fan 
upward. 


(3) After removing the fan motor lead connector inside the inverter assembly, remove the fan motor from the 
ventilation unit base. (M6 x 4, 2 locations) 


76> 


24-1-3. Replacement Procedures of the compressor unit 
(1) Remove the front panels (left and right sides). (M6 x 4, 2 locations, M4 x 1) 


(2) Purge the refrigerant. 
(3) Remove the inverter cooling duct. (M6 x 2) 
(4) Remove the strut (front). (M6 x 9, M4 x 1) 


(5) Remove the upper cover of the inverter unit. 






Inverter cover 









Front panel (Right) 
Strut (Front) 





Front panel 
(Left) 





| Fig. 24-2 
(6) Remove the fixing screws of the inverter assembly. (M4 x 2) 
(7) Remove all the sauneco of 2-way valve coil lead and etc. inside the inverter assembly. 
(8) Remove the inverter assembly to the front. 
(9) Remove the noise reduction box (A). (M4 x 7) 


(10)Remove the noise reduction box (B). (M4 x 4) 





Noise reduction box (B) 







Noise reduction 


rank case heater 


Cc 
\. Noise reduction box (A) 


Fig. 24-3 


9o = 


(11)Remove the noise reduction material and crank case heater. 


(12)Remove the discharge temperature sensors (2 locations on left and right side) mounting on the discharge 
pipe and remove the discharge pipe from the compressor. 


(13) Remove the suction temperature sensor (1 location) mounting on the suction pipe and remove the suction 
pipe from the compressor. (2 locations) 


(14) Remove the equalizer pipe on the suction pipe. 


Remove 










Remove at 2 locations. 
(Suction pipe) 


Equalizer 


Remove at 2 locations. 
(Discharge pipe) 


Fig. 24-4 
(15)Loosen the compressor fixing nuts (M10 x 3) and remove them. (M10 x 3) 
(16)Remove the connection lead wires on the compressor and terminal sections. 


(17)Insert a rectangular lumber or etc. (as carrying guides.) under the bottom of the compressor leaning the 
compressor. 


(18) Move forward the compressor rolling left and right by using the hooks for hanging. 
(19) Replace the compressor. 


(20) After replacing the compressor, perform the procedures in reverse order of removal. 


Hook for hanging 








Terminal cover 


1 Terminal cover 


<0 (Non-inverter side) 


Compressor fixing nut 





Fig. 24-5 


~80- 


24-1-4. Replacement Procedures of the Accumulator 
(1) Remove the front panel (left and right side). (M6 x 4, 2 locations, M4 x 1) 


(2) Purge the refrigerant. 

(3) Remove the inverter assembly forward according to the procedures described in item 24-1-3. 
(4) Remove the pipes connected to the accumulator. 

(5) Remove the accumulator fixing screw. (M6 x 1) 

(6) Replace the accumulator. 


24-1-5. Replacement Procedures of the Liquid Tank 
(1) Remove the front panel (left and right side). (M6 x 4, 2 locations, M4 x 1) 


(2) Purge the refrigerant. 

(3) Remove the pipe connected to the liquid tank. 
(4) Remove the liquid tank fixing screws. (M6 x 2) 
(5) Replace the liquid tank. 


24-1-6. Replacement Procedures of the Heat Exchanger 
(1) Remove the front panel (left and right side). (M6 x 4, M4 x 1) 


(2) Purge the refrigerant 
(3) Pull the replacing outdoor unit out from the coupled outdoor units. 


(4) Remove the front panel (right), the exhaust air cabinet, the side plate (right and left), the strut (back), and 
the ventilation assembly. 


(5) Replace the heat exchangers (upper right, lower right, upper left, lower left). (M4 x 8, 2 locations) 


-81- 





Fan guard 








Discharge air cabinet 






Propeller fan 





Fan motor 


Ventilation base 





Fin guard 





Heat exchanger 
(Upper left) 


Strut (Back) 










Sub heat exchanger 




















Heat exchanger 

(Lower left) Heat exchanger 
; (Upper right) 

Side plate Heat exchanger 


(Left) (Lower right) 


SA 
<< Se iti 


Electrical parts box 
(Inverter assembly) 





Side plate (Right) 









Bottom plate 





Compressor 


Front panel (Right) 






Service panel 
Front panel (Left) 





Fig. 24-6 


~82~ 


24-2. Multi-Controller (RBM-Y1031FE, Y1041FE) 


24-2-1. Replacement and Checking Procedures of the Electrical Parts 
(1) Remove the electrical parts box cover. 


24-2-2. Checking Procedures of the Refrigerant Cycle Parts 
(1) Remove the electrical parts box cover. 


(2) Remove the electrical parts box cover mounting screws (M4 x 2) and remove the electrical parts box 
cover from the unit holding the electrical parts upward. 


(3) Hook the removed electrical parts box on the base of the unit and fix it. (Refer to Fig. 24-8) 


(4) Remove the unit cover. (M4 x 4) 

Note: When the electrical parts box is removed, remove the PMV A — D connectors (PJ6 — PJ9), the 
temperature sensor (Th A ~ D, ThX) connectors (PJ1 — PJ5), the heater connector (PJ14) and 
SVD (A — D) connectors, SVS (A — D) connectors, SVSS, SVDD, SVH connectors after . 
performing item (1), and then perform item (2) and remove the electrical parts box. 









Unit cover 





w(cusceceanccaente 








PMV connector (A — D) al 
SVD connector (A — D) ae 
SVSS, SVDD, SVH connector ae K = Pui Pu2PasRue eee y | 8 Unit 
SVS connector (A ~ D) J a wy |B 
Electrical parts box aqacicad Temperature sensor connector 
CE aces le eee Electrical parts box 


Heater connector 


C= 


‘ | \.. Electrical parts cover 


Fig. 24-7 





Electrical parts box 


* Hook on the base of the unit. 


Fig. 24-8 


—83~ 


24-2-3. Replacement Procedures of the Refrigerant Cycle Parts 


(1) Purge the refrigerant from the outdoor unit. 
(2) Remove the refrigerant pipes and the inter-unit wiring connections. 


(3) Bring down the multi-controller from the ceiling. 
Note: 1. Replacement of the refrigerant cycle parts should be performed with the multi-controller brought 
down from the ceiling. 
2. Replacement of PMV, the expansion valve, the check vaive, the magnetic valve should be 
performed while cooling the valve main body by wet clothes. 
3. For locations of the parts, please see the parts lists. 


Heat insulator for pipes — foamed polyethylene 


(with heat-proof adhesive) 
| p ee p 





Top plate 


Float switch 


Heater 


Cal 


Leaf plate 


Fig. 24-9 


24-2-4. Replacement Procedures of the Heater 
(1) Remove the leaf plate. (M4 x 6) 


(2) Remove the heater connector PJ14 (on the PC board) and replace the heater. 


(3) Insert the connector of the new heater into PJ14 on the PC board and mount the leaf plate. 
Note: 1. Before attaching a new heater, completely clean residual adhesive on the bottom plate. 
2. Glue the new heater so that it does exceed the heat insulators and leaf plate and clamp at the 
exit side without catching the heater leads. 


24-2-5. Replacement Procedures of the Pipe Heat Insulators 
(1) Remove the unit cover. (M4 x 4) 


(2) Peel off the pipe heat insulators to be replaced with a knife or etc. 


(3) Remove an adhesive seal of the new pipe heat insulator and attach the insulators surely on the pipe 
without slipping off. 


24-2-6. Replacement Procedures of the Float Switch 
(1) Loosen the screws of the float switch and remove the float switch from the bottom plate. 


(2) Remove the float switch connector PJ10 (on the PC board). 


(3) Replace the float switch and mount it according to the reverse order (2) — (1). 


~85— 








25.EXPLODED VIEWS AND PARTS LIST 


25-1. Outdoor Units (MAR-F81HTM8,MAR-F101HTM8) 





6,13 ,42,43 ,44 


i “| a a) Pal 





~86-— 





Loca- | part No. Description 
tion No. 


43046151] 2-Way Valve 

43046255 | Solenoid Coil, 4-Way Valve 
43047491 | Capillary Tube 1.5 Diameter 
43047527 | Capillary Tube 2.0 Diameter 
43048009 | Fusible Plug 

43107200] Spring, Base 

43119391] Fin Guard 

43119392] Fan Guard 

43120170| Propeller Fan 

43121545} Fan Motor, STF-200-150C 
43141603}| Compressor, HV990CW-Y12 | 
(MAR-F81HTM8) 
Compressor, HV1200CW-Y12 
(MAR-F101HTM8) 
Condenser, Right-Lower 
(MAR-F81HTM8) 
Compressor, Right-Lower 
(MAR-F101HTM8) 
Condenser, Right-Upper 
(MAR-F81HTM8) 
Condenser, Right-Upper 
(MAR-F101HTM8) 
Condenser, Left-Lower 
(MAR-F81HTM8) 
Condenser, Left-Lower 
(MAR-F101HTM8) 
Condenser, Left-Upper 
(MAR-F81HTM8) 
Condenser, Left-Upper 
(MAR-F101HTM8) 
Condenser, Sub 
(MAR-F81HTM) 
Condenser, Sub 
(MAR-F101HTM8) 
Dryer 


















































43141702 






43143572 






43143557 






4314573 






43143558 













43143574 





43143559 





43143575 






43143560 











43143576 





43143562 






43145066 


aa Part No. Description 
tion No. 


43146252! Check Valve 

43146283] Check Valve 

43146351) Service Valve 

43146367] Switch, High Pressure 
43146397} Pulse Motor Valve 

43146398] Valve Body 

43146506] Solenoid Coil 

43146404] Pulse Motor Valve 

43146503| Packed Valve (5/8") 
43146428] Check Valve 

431464431 Solenoid Coil 

43146427} Expansion Valve 
(MAR-F81HTM8) 

Expansion Valve 
(MAR-F101HTM8) 

4-Way Valve 

Packed Valve (3/4") 

Sensor, Pressure 

Strainer 

Strainer 

Liquid Tank (MAR-F81HTM8) 
Liquid Tank (MAR-F101HTM8) 
Accumulator (MAR-F81HTM8) 
Accumulator (MAR-F101HTM8) 
Switch, High Pressure 

Switch, Low Pressure 

Heater, Crank Case 

Cushion, Under, Compressor 
Cushion, Upper, Compressor 
Spacer 

Capillary Tube 0.8 Diameter 
Capillary Tube 1.0 Diameter 
Reactor 

Owner’s Manual 

Manual, Trial Run and Service 
































































43146444 











































43146446 
43146504 
43146458 
43147529 
43147537 
43148123 
43148120 
43148122 
43148121 
43151229 
43151230 
43157254 
43195185 
43195186 
43195198 
44246235 
44246236 
43155136 
43188856 
43188859 


.~ 87 - 


25-2. Electrical Parts Assembly (MAR-F81HTM8, MAR-F101 HTMB8) - 


108 


107 





120 


121,122 


143 


123 






, coer et 
t bi lad wae C0) 
ty rete st 
euiens 

{4 


on oe eee SS | 












128 
139 138 134133 121,124 125,126 


— 88 - 


Location te 
Description 
fevater] arto, | Desernon | 


43131031] G-Transistor, MG50Q6ES11 
43169622] Rectifier, 30U6P42 
43150214] TRS-Thermostat , TRC 
TR-100B10SPT3A 

Noise Filter, DC 

Diode Clipper Assembly 

Fan Motor 

Terminal 

Terminal, 3P (L1, L2) 
Terminal, 6P 

Terminal, 6P 

PC Board, MCC-1252, Gate 
PC Board, MCC-1251, Control 
Relay, LY-1F 

Noise Filter 

Transformer FT57 

Capacitor, MF 

Terminal Block, 3P 

Terminal, 3P (N) 

Terminal Block, 3P (RST) 
PC Board, MCC-1253, Surge 
Holder, Fuse 

Fuse 

Magnetic Contactor 
(MAR-F81HTM8) 




























































43169617 
43169619 
43169613 
43160438 
43160450 
43160447 
‘| 43160448 
43169624 
43169623 
43154156 
43155135 
43158127 
43155134 
43060750 
43160449 
43160426 
43169625 
43160451 
43160452 
43142312 




















* Note: Replace both two capacitors at a time. 


43152356] Magnetic Contactor 
(MAR-F101HTM8) 
Fuse 

Fuse 

Fuse Block 

Noise Filter 
Ferrite Core 
Noise Filter, AC 
Return Lock STR-4AB 

TC Sensor ... 

TC Sensor 

TC Sensor 

Sensor 

Sensor 

PC Board, MCC-1223, 
Interface 

Magnetic Contactor 
Transformer FT13-2 

Starter 

Capacitor, LNT2G222KSMCTF 
SEM Resistor 

Hole-CT 

Surge Absorber 


Location 
No. 
123 

































43160453 
43460526 
43060859 
43169618 
43169620 
43169616 
43154148 
43150172 
43150173 
43150171 
43150176 
43150175 

43169628 






































43152334 
43158129 
43169612 
43169621 
43169614 
43169615 
43055392 


— 89 — 


25-3. Multi-Controller (RBM-Y1031FE, RBM-Y1041FE) 


20, 19,18 


43019604 
43146443 
43046151 
43046156 
43046269 
43046270 
43047527 
43060229 
43146283 
43146398 
43146506 
43146429 
43146505 
43151231 
43157252 


Holder, Sensor 

Solenoid Coil 

2-Way Valve 

Check Valve 

Pulse Motor Valve 

2-Way Valve 

Capillary Tube 2.0 Diameter 
Fuse, 1A 

Check Valve 

Valve Body 

Solenoid Coil 

Expansion Valve 

2-Way Valve 

Float Switch 

Panel Heater (RBM-Y1041FE) 








Parte, | Deserpton | 


43157253; Panel Heater (RBM-Y1031FE) 
43179086; Cap 

43189026 | Insulator, Liquid-A 
43189027 | Insulator, Liquid-B 
43189028 | Insulator, Header-A 
(RBM-Y1041FE) 

Insulator, Header-A 
(RBM-Y1031FE) 

insulator, Header-B 
(RBM-Y1041FE) 

Insulator, Header-B 
(RBM-Y1031FE) 
Decoration Bolt 

Capillary Tube 0.8 Diamer 
Capillary Tube 1.0 Diameter 


Location 
No. 
19 






























43189029 






43189031 






43189032 













43197141 
44246235 
44246236 


Z6p3 









@ 


(+) 
Coan 


)) 

IC 
Ne to} 
i 







25-4. Electrical Parts Assembly (RBM-Y1041FE, RBM-Y1031FE) 
1 108 
Kee 
6 
Ly 


a ph Dae 


102 


107 


PJ5 PJ16 





106 





105 


104 


103 


PJ1 PJ2 PJ3 PJ4 
ThA ThB Th ThD 






teraten| artno. | Description | 
No. 


109 |43060750/ Terminal Block, 3P 
43160398} Terminal Block, 6P 


43158128) Transformer FT56 
43169627| PC Board Assembly 


Location 
No. 





































43150162] Sensor (RBM-Y1041FE) 
43150163] Sensor 43160399] Terminal Block, 3P 
43150164] Sensor (RBM-Y1031FE) 







43150165 
43150166 
43151195 


Sensor (RBM-Y1041FE) 
Sensor 
Switch, Micro 






43160397 | Terminal Block, 6P 
43060776] Terminal 






~91— 


This page is not printed. 


=Oo0 


TOSHIBA CORPORATION 


1-1, SHIBAURA 1-CHOME, MINATO-KU, TOKYO 105, JAPAN 


FILE NO. A13-9602 
SUPPLEMENT 


TOSHIBA 


TO 


TOSH-02068 


SERVICE MANUAL 


CONDITIONER 


AIR 


SUPER MULTI COOL/HEAT FLEX SERIES 


C S&S 


ny 


ee, 


aS 


ey 


ee 


bo 


Fe 


Use this supplement together with the origi 


oe 





CONTENTS 
T SPECIFICA TION SS sx cececscececeZ nccesccciacsaitdavstacencbesausedeacyacdsaveceststtereatsasaeeenveteddaces 
2. ELECTRICAL PARTS SPECIFICATIONS ............::escsecssceseseseseseesseeeneneenesenenees 
3. CONNECTIONS OF CONTROL WIRES BETWEEN UNITS ..........c:ccssesseeeesee 


4. EXPLODED VIEWS AND PARTS LIST .......... cee scsecsescsseserescesesevesensneesenseeaees 


> 


) 
Power supply (*2) 380 — 415V 3-phase 50Hz 


1. SPECIFICATIONS OF OUTDOOR UNIT 


Model Name MAR-F81HTM8-E 
Cooling capacity (*1) (kW) 20.0 (22.4) 
Heating capacity (*1 (kW) 20.0 (25.0) 








MAR-F101HTM8-E 
25.0 (28.0) 
25.0 (31.5) 


12.8 (14.0) 
: 8,000 (9,200) 
94 (95) 
11.7 (15.3) 15.0 (20.0) 
7,700 (10,100) 10,100 (13,600) 
95 (95) 97 (98) 
Direct 
1,490 x 1,290 x 750 1,490 x 1,290 x 750 
330 | 340 
Finished color Silky gray (Munsell 6Y7/0.3) 
Compressor Hermetically sealed 
5.6 
Propeller fan 
Fan unit 0.15 x2 
10,000 
R-22 (21.6) 
019 
015.9 
025.4 028.6 
Flare connection (liquid side/discharge gas side), 
Brazing connection (suction gas side) 


( 
(m) 
Max. actual piping length (m) 100 : The equivalent length is the base if there 
are too many bends. 
Max. piping head (m) 50 : In case of outdoor unit installed above, 
20 : In case of outdoor unit installed below. 


Crank case heater 


15.7 (17.2) 
10,100 (11,500) 
93 (96) 

















_~ 
x 

Co} 

a 





~ 
a 














_—* 








~“ 





Note: *1: Cooling/Heating capacity is based on JIS B 8615. The value marked by (_) means operation at 
maximum capacity. 
*2: Power voltage, if it varies, should be within a 10% range. 
Specifications are subject to change without notice. 


2. ELECTRICAL PARTS SPECIFICATIONS 


2.1 Specifications of Refrigerant Cycle Parts 


Out ew | cP 


6 7.5 
Pole (P) 2/2 (Inverter side/Non-inverter side) 


Coil resistance (Q) 1.49/2.51 
Inverter side/Non-inverter side) 


voter ali? 
ae 




















(W) 
Power supply (A) 1.12/1.44 
Pole (P) 


Inner over-load relay OFF:1152+5°C 
Se hie 20PS-B/20PS-G (Inverter side/Non-inverter side) 
switch Operating pressure (kg/cm?G) OFF: 30, ON: 23/OFF: 23, ON: 30 
ae 20PS-1 
pressure 
switch Operating pressure (kg/cm?G) ON: 1.5, OFF: 0.25 
V25-760B 
Compressor case heater AC 240V, 74W 


Model name: NTP-Q250TF-2 
Input voltage: DC 12V 
Output voltage: DC 0.5 — 4.5V 


Discharge temperature sensor 25°C: 50kQ, 50°C: 17.9kQ, 100°C: 3.35kQ 
Suction temperature sensor 0°C: 32.8kQ, 25°C: 10kQ, 50°°C: 3.6kQ 
Outdoor air temperature sensor 0°C: 32.8kQ, 25°C: 10kQ, 50°C: 3.6kQ 












Pressure sensor 






















Flow rate adjustment valve 
Flow rate adjustment valve (for bypass) 
2-way valve 





2-way valve 


Specifications are subject to change without notice. 


Model Name 
Power supply 
Output voltage at operating frequency of 60Hz 
IGBT 
Relay 


N 
ho 
n 
ao] 
© 
Q, 
=f 
o 
o 
ro) 
=] 
77) 
fe] 
wh 
5 
< 
oO 
a5 
@o 
= 
> 
7) 
on 
i) 
3 
cs 
< 
Uv 
i) 
rt 
o” 


Blower motor running capacitor 
Rectifier 

AC noise filter 

DC noise filter 


Power supply rectifier capacitor 





Fuse 

Electronic starter 
Reactor 

Fan motor relay 
Control relay 


Magnetic contactor for compressor (Inverter side) 


Magnetic contactor for compressor 
(Non-inverter side) 


Transformer (Inverter) 
Transformer (Interface) 

Power supply terminal plate 
PC board (Inverter) 

PC board assembly (Interface) 


Cooling fan 


Specifications are subject to change without notice. 


MAR-F81HTM8-E MAR-F101HTM8-E 
380 — 415V, 3-phase, 50Hz 
AC 266V 
MG50Q6ES11 
LY1F (AC 240V) 
EAG45M605UF 1, 6uF450V 
30U6P42, 30A 
ZSG2208-02, 8A, 250V 
LF215AV, 15A, 716V 
LNT2G222KSMCTF, 2200,F/400V 
20A 
912X25E101YV20 
CH-26-T, 6.2mH, 18A 
G2R217PV 
G4U-112P 
138A 


12A 15A 


4/3 


tt 


AC 600V, 60A 
MCC-1251 
MCC-1223 

3560EXV-5, 220 — 240V 


2.3 Specifications of Multi-controller Parts 


Model Name RBM-Y1041FE-E 

Flow rate adjustment valve EV23RC7, Coil DC 12V 
Temperature sensor 
Float switch 
Power supply transformer eee ee 
Relay (on PC boare) 

e5W 
Temperature fuse for heater 
Power current fuse for heater 
Discharge gas side solenoid valve 
Suction gas side solenoid valve 
2-way valve 
2-way valve 


































Specifications are subject to change without notice. 


3. CONNECTIONS OF CONTROL WIRES BETWEEN UNITS 


Check that the control wires between the indoor units and multi-controller and between the multi-controller and 
outdoor unit are properly connected. Check to see the terminal numbers for the control wires. 








Multi-Controller 
For unit C 












For unit B 


+ [B1]B 2/83 
Tae es Doe 


For unit A 


= JAtAzia3| 
re ee ee 


For unit D For outdoor unit 









Indoor unit A Indoor unit C 


SoS ea Cen me! | 
a oenckecscessnd 


= 
a 
fo] 
°o 
= 
c 
=. 
~*~ 
aw 


! 
1 
H 
{ 
! 
! 
i 
' 
' 
! 
1 
1 
1 
' 
i 
I 
1 
1 
! 
' 
! 
L 
o- 
' 
i 
i 
' 
' 
' 
1 
' 
! 
t 
! 
i 
t 
| 
1 
i 
t 
u 
to 
t 
1 
{ 
‘ 
J 
{ 
‘ 
i 
i 
i 
{ 
! 
i 
1 
1 
! 
! 
' 
! 
i 
' 
u 


[ rer een 


4. EXPLODED VIEWS AND PARTS LIST 


4.1 Outdoor Units (MAR-F81HTM8-E, MAR-F101HTM8-E) 


PMV1 PMV2 


1 
1 
svi Sv2 SV4SV5 SV16 


oOOoao0 








43046151 
43046255 
03 43047491 
04 43047527 
05 43048009 
06 43107200 
09 43119391 
10 43119431 
11 43120170 
12 43121545 
43141606 















43141705 






43143572 






43143557 






43143573 









43143558 






43143574 






43143559 






43143575 






43143560 






43143576 






43143562 






43145066 









































2-Way Valve 
Solenoid Coil, 4-Way Valve 
Capillary Tube 1.5 Diameter 
Capillary Tube 2.0 Diameter 
Fusible Plug 
Spring, Base 
Fin Guard 
Fan Guard 
Propeller Fan 
Fan Motor, STF-200-150C 
Compressor, HV991CW-Y12 
(MAR-F81HTM8-E) 
Compressor, HV1201CW-Y12 
(MAR-F101HTM8-E) 
Condenser, Right-Lower 
(MAR-F81HTMB8-E) 
Condenser, Right-Lower 
(MAR-F101HTM8-E) 
Condenser, Right-Upper 
(MAR-F81HTM8-E) 
Condenser, Right-Upper 
(MAR-F101HTM8-E) 
Condenser, Left-Lower 
(MAR-F81HTM8-E) 
Condenser, Left-Lower 
(MAR-F101HTM8-E) 
Condenser, Left-Upper 
(MAR-F81HTM8-E) 
Condenser, Left-Upper 
(MAR-F101HTM8-E) 
Condenser, Sub 
(MAR-F81HTM8-E) 
Condenser, Sub 
(MAR-F101HTM8-E) 
Dryer 








43146252 
43146283 
43146351 
43146367 
43146525 
43146398 
43146506 
43146526 
43146503 
43146428 
43146443 
43146427 


43146444 


43146446 
43146504 
43146524 
43147529 
43147537 
43148123 
43148120 
43148122 
43148121 
43151229 
43151230 
43157254 
43195185 
43195186 
43195198 
44246235 
44246236 
43155136 
43185018 
43188019 


Description 


Check Valve 

Check Valve 

Service Valve 

Switch, High Pressure 

Pulse Motor Valve 

Valve Body 

Solenoid Coil 

Pulse Motor Valve 

Packed Valve (5/8") 

Check Valve 

Solenoid Coil 

Expansion Valve 
(MAR-F81HTM8-E) 

Expansion Valve 
(MAR-F101HTM8-E) 

4-Way Valve 

Packed Valve (3/4") 

Sensor, Pressure 

Strainer 

Strainer 

Liquid Tank (MAR-F81HTM8-E) 
Liquid Tank (MAR-F101HTM8-E) 
Accumulator (MAR-F81HTM8-E) 
Accumulator (MAR-F101HTM8-E) 
Switch, High Pressure 

Switch, Low Pressure 

Heater, Crank Case 

Cushion, Under, Compressor 
Cushion, Under, Compressor 
Spacer 

Capillary Tube 0.8 Diameter 
Capillary Tube 1.0 Diameter 
Reactor 

Owner's Manual 

Manual, Trial Run and Service 





4.2 Electrical Parts Assembly (MAR-F81HTM8-E, MAR-F101HTM8-E) 


108 


107 








145 ———f)) 111 109110 442 113 444 115 116 
@ \_\ = [O J 






a 





am Oi i552 8 mer a da 


105 

106 ll 
101 1 
102 i 
142 






pe / 








28 
125,126 





130 
121,124 


43131031 
43169622 
43150214 





43169617 
43169619 
43169613 
43160438 
43160450 
43160447 
43160448 
43169624 
43169623 
43154156 
43155135 
43158140 
43155134 
43060492 
43160449 
43160426 
43169625 
43160451 
43160452 
43142312 


* Note: Replace both two capacitors at a time. 


Location et 
PR Trani [maim 


G-Transistor, MG50Q6ES11 
Rectifier, 30U6P42 
TRS-Thermostat, TRC 
TR-100B10SPT3A 

Noise Filter, DC 

Diode Clipper Assembly 
Fan Motor 

Terminal 

Terminal, 3P (L1, L2) 
Terminal, 6P 

Terminal, 6P 

PC Board, MCC-1252, Gate 
PC Board, MCC-1251, Control 
Relay, LY-1F 

Noise Filter 

Transformer, FT70 
Capacitor, MF 

Terminal Block, 9P 
Terminal, 3P (N) 

Terminal Block, 3P (RST) 
PC Board, MCC-1253, Surge 
Holder, Fuse 

Fuse 

Magnetic Contactor 
(MAR-F81HTM8-E) 





11 


Location 
No. 
123 


43152356 


43160453 
43460526 
43060859 
43169618 
43169620 
43169616 
43154148 
43150272 
43150273 
43150271 
43150275 
43150274 
43169628 
43152334 
43158139 
43169612 
43169621 
43169614 
43169615 
43055392 
43160493 
43160494 


Description 


Magnetic Contactor 
(MAR-F101HTM8-E) 
Fuse 

Fuse 

Fuse Block 

Noise Filter 

Ferrite Core 

Noise Filter, AC 
Return Lock STR-4AB 
TC Sensor 

TC Sensor 

TC Sensor 

Sensor 

Sensor 

PC Board, MCC-1223, Interface 
Magnetic Contactor 
Transformer, FT69 
Starter 

Capacitor, LNT2G222KSMCTF 
SEM Resistor 
Hole-CT 

Surge Absorber 
Clamp Filter 

Clamp Filter 





4.3 Multi-Controlier (RBM-Y1031FE-E, RBM-Y1041FE-E) 





[rae [__ eon 


43019604 | Holder, Sensor 

43146443 | Solenoid Coil 

43046151 | 2-Way Valve 

43046156 | Check Valve 

43046527 | Pulse Motor Valve 
43046270 | 2-Way Valve 

43047527 | Capillary Tube 2.0 Diameter 
43060229 | Fuse, 1A 

43146283 | Check Valve 

43146398 | Valve Body 

43146506 | Solenoid Coil 

43146429 | Expansion Valve 

43146505 | 2-Way Valve 

43151231 | Float Switch 

43157252 | Panel Heater (RBM-Y1041FE-E) 


Location 
No. 
01 


















































12 


43157253 
43179086 
43189026 
43189027 
43189028 


43189029 


43189031 


43189032 


44246235 
44246236 


Description 


Panel Heater (RBM-Y1031FE-E) 
Cap 

Insulator, Liquid-A 
Insulator, Liquid-B 
insulator, Header-A 
(RBM-Y1041FE-E) 
Insulator, Header-A 
(RBM-Y1031FE-E) 
Insulator, Header-B 
(RBM-Y1041FE-E) 
Insulator, Header-B 
(RBM-Y1031FE-E) 
Capillary Tube 0.8 Diameter 
Capillary Tube 1.0 Diameter 





4.4 Electrical Parts Assembly (RBM-Y1031FE-E, RBM-Y1041FE-E) 


43158139 
43169627 
43150266 
43150267 
43150268 
43150269 
43150270 
43151242 


101 
108 


Zo 


103 104 105 106 107 102 


SSS. 


nl 


4 
Ss 
a 
wo 
8 
a 
= 
x 
a 
2 
3 
a 
2 
a 
S 
a 


ThA ThB ThCThD Thx 


113 


Transformer 

PC Board Assembly 
Sensor 

Sensor 

Sensor 

Sensor (RBM-Y1041FE-E) 
Sensor 

Micro-Switch 


13 





43060488 
43160489 
43160491 


43160490 
43060776 
43060229 
43060859 





109 


110 


111 


412 


113 114 


Description 


Terminal 4P 

Terminal 4P (RBM-Y1031FE-E) 
Terminal 9P (RBM-Y1041 FE-E) 
Terminal 9P 

Terminal 

Fuse, 1A 

Fuse-Block