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^DURR 

W \ 


DENTAL 


Installation and Operating Instructions 
DURR Regeneration Unit for X-ray developers 
XR 24, XR24II, XR 24 Nova, 

XR 24 Pro 








































Content 


Important Information 


1. Notes .3 

1.1 CE - Labeling.3 

1.2 Electromagnetic Compatibility.3 

1.3 General Notes.3 

1.4 General Safety Information.3 

1.5 Combining Appliances.4 

1.6 Electrical Safety Notes.4 

1.7 Warnings and Symbols.4 

2. Product information .4 

2.1 Correct Usage.4 

2.2 Incorrect usage.4 

3. Contents .5 

3.1 Accessories.5 

3.2 Special Accessories.5 

4. Technical Data .5 

5. Functional Diagram. 6 

5.1 Regeneration Unit connected to 

XR 24, XR 24 II, XR 24 NOVA.6 

5.2 Regeneration Unit connected to 

XR 24 PRO.6 

6. Functional Description .7 

6.1 Regeneration Unit RU 24 
connected to XR 24, XR 24 II, 

XR 24 NOVA.7 

6.2 Regeneration Unit RU 24 

connected to XR 24 PRO.7 


Installation 

7. Set-up alternatives for 

Regeneration Unit. 8 

8. Preliminary measures ... 

8.1 Remove front cover. 

8.2 Remove rear cover.. 

8.3 Remove side covers 


9. Hose connections.10 

10. Electrical connections.11 

10.1 XR 24, XR 24 II, XR 24 NOVA.11 

10.2XR 24 PRO.11 

11. Setting the Regeneration Electronics12 

11.1 XR 24.12 

11.2XR 24 II and XR 24 NOVA.13 

11.3 XR 24 PRO.14 

12. Check Settings.15 

12.1 XR 24, XR 24 II, XR 24 NOVA.15 

12.2XR 24 PRO.15 

13. Setting Regeneration Pump 

Piston Stroke .16 

14. Commissioning. 16 

Operation 

15. Cleaning the Regeneration Unit.17 

15.1 XR 24, XR 24 II, XR 24 NOVA.17 

15.2XR 24 PRO.17 

16. Cleaning the X-ray Developer.17 

17. Disposal of Chemicals.17 


Troubleshooting 


18. Troubleshooting Tips for XR 24, 

XR 24 II, XR 24 NOVA. 18 

19. Troubleshooting Tips 

XR 24 PRO. 19 


CD CD CD CD 















































IMPORTANT INFORMATION 
1. Notes 

1.1 CE-Labeling 

This product bears the CE- Labeling in 
accordance with the guidelines of the 
Medical Products Committee 93/42/EWG and 
satisfies all criteria of the Appendix I to said 
guidelines. 


1.2 Electromagnetic Compatibility 

• This product conforms to all requirements 
laid down for Electromagnetic Compatibility 
of Medical Appliances. 

1.3 General Notes 

• These Installation and Operating 
Instructions form an integral part of the unit. 
They must be kept close to the unit and in 
readiness whenever required. Precise 
observance of these instructions is a pre¬ 
condition for use of the unit for the intended 
purpose and for its correct installation and 
operation. 

These Installation and Operating 
Instructions should be passed on to any 
future purchaser or explained to any new 
operator. 

• Safety for the operator as well as trouble- 
free operation of the unit are only ensured if 
use is made of original equipment parts. 
Moreover, use may only be made of those 
accessories that are specified in the 
technical documentation or that have been 
expressly approved and released by Durr 
Dental for the intended purpose. 

Any warranty or guarantee becomes 
invalid in the case where parts or 
accessories are used which are not 
supplied by Durr Dental. 

• Durr Dental only regard themselves as 
being responsible for the equipment with 
regard to safety, reliability and proper 
functioning if assembly, resettings, 
changes or modifications, extensions and 
repairs have been carried out by Durr 
Dental or an agency authorized by Durr 
Dental and if the equipment is used in 
conformity with the Installation and 


Operating Instructions. 


• The developer unit herein described 
conforms to the relevant safety standards 
valid at this time. All switches, processes, 
trade marks, software programs and 
appliances named in this document are 
registered names. 


• Any reprinting of the technical 
documentation, in whole or in part, is 
subject to prior written approval of Durr 
Dental. 

1.4 General Safety Information 

This appliance has been so designed and 
constructed by Durr Dental that any danger 
arising from the use of this product is 
virtually excluded provided it is fitted 
according to the instructions. However, in 
order to avoid any possible damage or injury 
we are obliged to point out the following 
safety measures. 



• When operating this appliance all local 
rules and regulations must be observed! 
Any modification whatsoever is not 
permitted: any guarantees covered by 
Durr Dental thus become invalid. In the 
interests of ensuring problem-free running 
the owner and operator are responsible for 
observing all rules and regulations. 

• Retain all packing material for possible 
return of the product to the manufacturer. 
Take care that it does not fall into the hands 
of children. Only the original packing 
guarantees optimal safety of the appliance 
during transport. 

Should return of the product to the 
manufacturers be necessary during the 
guarantee period, Durr Dental accepts no 
responsibility for damage occurring during 
transport where the original packaging 
was not used! 

• This product is a technical appliance and 
may only be installed and operated or 
used by someone who has been trained or 
who has experience of how to use the 
appliance correctly. 

• Before every use the operator must check 
the functional safety and the condition of 
the appliance. 


3 


• The operator must be knowledgeable in the 
operation of the appliance. 



The product is not designed to be used in 
medical treatment areas where there exists 
the danger of explosion. Areas where 
explosions could occur are those where 
flammable anesthetic material, skin 
cleansers, oxygen and skin disinfectants 
are present. This appliance is not to be 
used in any areas where the atmosphere 
could cause fire. 

.5 Combining Appliances 

Units may only be connected to the system 
or to other units when it has been 
established that there is no reduction of 
safety for the patient, the operator or the 
environment through such connection. 


Where it is not absolutely clear from the 
documentation whether the safety is 
reduced by such connection, then the 
operator must establish, e.g. by contacting 
either the manufacturer or an expert, that 
there is no danger to the patient, the 
operator or the environment through such 
connection. 


1.7 Warnings and Symbols 

In the installation and Operating Instructions 
use is made of the following terms or 
symbols to denote information of special 
importance: 

Information, requirements and 
prohibitions on preventing 
personal injury and extensive 
damage to propert. 

Special information concerning the 
economical use of the appliance and 
other instructions. 

Observe Installation and Operating 
Instructions 


CE-Labeling 


Power on/off 
C^£)lC^£) Select program 



1.6 Electrical Safety Notes 

• This regeneration unit may only be used 
with a correctly fitted standard earthed 
plug and socket. 

• Before connecting the appliance to the 
power supply check that the current 
required and the frequency is the same as 
that provided at the power outlet. 

• No extension cables should be used to 
connect the machine to the power outlet. 

• Warning! Check the appliance and the 
power supply cables for correct installation 
and possible damage before switching on. 
Damaged cables, plugs and sockets must 
be replaced before use. 

• The appliance should not be used in the 
patient's vicinity. A minimum distance to 
patient of 1.5 meters is recommended. 


(Enter) Confirm selection 

2. Product information 

2.1 Corre<t Usage 

The DORR Regeneration Unit is designed 
solely for use with DORR DENTAL X-ray 
developer units of the model series XR .. . 

Precise observance of the installation and 
operating instructions is a pre-condition for 
use of the unit for the intended purpose and 
for its correct installation, operation and 
maintenance. 

2.2 Incorrect usage 

Any other use or use beyond what is 
specified is deemed to be not for the 
intended purpose. The manufacturer 
accepts no liability for damage resulting 
therefrom. All risk is borne solely by the user. 


4 




3. Contents 


4. Technical Data 


Regeneration Unit RU 24 for X-ray Regeneration Unit RU 24 for X-ray 

developers XR 24 .. . developers XR 24 .. . 


230V - 240V, 50Hz - 60Hz. 1700-820-00 

100V - 110V, 50Hz - 60Hz. 1700-830-00 

m Before connecting the regeneration 
unit to the developer please make 
sure to check the following: 

Is the regeneration unit to be 
connected to a developer of the 
model XR 24, XR 24 II, XR 24 NOVA 
or 

to an XR 24 PRO? 

For connection to an XR 24 PRO: 

Use the assembly set 1700-284-00 (included) 

For connection to an XR 24, XR 24 II, 

XR 24 NOVA: 

Use the conversion set PCB 1700-212-00! 
This must be ordered separately. See 
section 3.2 and installation as described in 
section 11.2. 

The assembly set 1700-284-00 is then no 
longer required. 

3.1 Accessories 

1 Assembly set 

for XR 24 Pro only . 1700-284-00 

3.2 Special Accessories 

The following parts are not part of the 
standard contents. 

Order separately if required! 


Model 1700-820-00 (230V) 
Model 1700-830-00 (110V) 


Model 1700-820-00 


Voltage (V) 230 - 240 

230 

Frequency (Hz) 50 

60 

Power 

consumption (A)0.65 / 0.9 

0.5 

Output (W) 50 - 80 

50-80 

Model 1700-830-00 

Voltage (V) 100-110 

100 - 110 

Frequency (Hz) 50 

60 

Power 

consumption (A) 0.8/1.0 

0.6 / 0.75 

Output (W) 40 - 80 

40 - 80 

Model 1700-820-00 

1700-830-00 

Measurements (cm) 

L x B x H 32 x 36 x 37 

Weight (empty) (kg) 4 


1 PCB conversion set, 

only for XR 24 II and 

XR 24 NOVA . 1700-212-00 


5 



















5. FUNCTIONAL DIAGRAM 

5.1 Regeneration Unit <onne<ted to XR 24, XR 24II, XR 24 NOVA 


A1 



5.2 Regeneration Unit <onne<ted to XR 24 PRO 



6 























































































6. FUNCTIONAL DESCRIPTION 


6.1 Regeneration Unit RU 24 <onne<ted to XR 24, XR 24II, XR 24 NOVA 


The regeneration pumps of the X-ray developer are activated every time that the appliance is 
initially switched on and, furthermore, are reactivated after every length of 1.3m of developed 
film material when the regeneration switch is correctly set (switch (C) to ON). 

For the duration of time that the film intake is activated (via light barrier H) on a film being fed into 
the appliance, an impulse generator (A) produces rotational impulses which are counted, the 
number of impulses being proportional to the length of the film. 

The potentiometer (D) allows the running time of the regeneration pumps to be set at any interval 
between 0 s and 60 seconds. 

The running time of the regeneration pump is factory set at 30 s. In this time the pumps feed c. 
190 ml fresh chemicals into the developer and fixer baths of the X-ray developer from the 51 
regeneration canisters. 

Switching off the pumps, and / or switching off the X-ray developer transmits a delete impulse to 
the counter which then resets at zero. 



A) Impulse generator 

A1) XR24: Drive shaft light barrier 

A2) XR24 II: Drive motor impulse generator 

A2) XR24 Nova: Drive motor impulse generator 

B) Regeneration Unit 

C) PCB regeneration switch On/Off 

D) Potentiometer for time setting 

G) Reduction of regeneration time to 50% / 30s 

H) Film intake light barrier 


6.2 Regeneration Unit RU 24 <onne<ted to XR 24 PRO 

The regeneration pumps of the XR 24 PRO are reactivated after every length of 1.3m of 
developed film material. 

For the duration of time that the film intake is activated (via light barrier FI) on a film being fed into 
the appliance, a generator produces impulses which are counted, the number of impulses being 
proportional to the length of the film. 

The software in the service program of the XR 24 PRO allows the running time of the 
regeneration pumps to be set at any interval between 0 s and 60 seconds, see section 11.3. 

The running time of the regeneration pump is factory set at 30 s. In this time the pumps feed c. 
190 ml fresh chemicals into the developer and fixer baths of the X-ray developer from the 51 
regeneration canisters. 

The switching off of the pumps after a regeneration phase automatically transmits an impulse to 
the counter which then resets at zero. The current counter reading is stored whenever the X-ray 
developer is swiotched off or in case of a power down. 

A) Drive motor impulse generator 

B) Regeneration Unit 

H) Film intake liqht barrier 

I) PCB 

J) Display 


7 


INSTALLATION 


7. Set-up alternatives for 
Regeneration Unit 

• Set-up of Regeneration Unit RU 24 next 
to the X-ray developer: 

Where sufficient space is available, this 
set-up is preferred. 

• Set-up of Regeneration Unit RU 24 in a 
cupboard: 

The operator must be instructed to check 
the state of the chemicals regularly. 

Set-up of Regeneration Unit 



!\ RU 24 above the level of the X-ray 


developer is not permissible. This 
set-up position makes it possible 
that chemicals leak into the X-ray 
developer baths. 

Please ensure that all connecting hoses from 
the Regeneration Unit RU 24 to the X-ray 
developers are laid without any twists or 
bends. The distance between Regeneration 
Unit and X-ray developer should not exceed 
2m. 

When setting-up the X-ray developer, 
ensure good access to it and to the 
collecting tanks. 

















8. Preliminary measures 

The following measures need only be 

taken when the Regeneration Unit is 

subsequently being connected to a X-ray 

developer. 

• Remove mains plug (1) from socket 

• Lift cover (2) 

• Drain any chemicals from the X-ray 
developer 

• Open the green catch (3) on the film intake 
roller set (6) 

• Remove roller set (6) 

• Open the green catch (3) and the clips (4) 
of the dryer roller set (5) 

• Swing the dryer roller set (5) towards the 
rear and lift out 

• Rinse the baths with warm water 

• Close the water tap 

• Remove the cover necessary for working 

8.1 Remove front rover 

• Unscrew the two quick-release screws 
(11) from the front cover panel (12) 

• Unscrew the three Philip’s screws (7) and 
remove the front cover panel (12) 

8.2 Remove rear rover 

• Unscrew the three Philip’s screws (7) and 
remove the rear cover panel (9) 

8.3 Remove side rovers 

• Remove front (12) and rear panels (9), lift 
the side panels (10) upwards to remove 


2 

1 

3 

4 

5 

6 

7 

8 

7 

9 

10 

11 

12 



































9. Hose connections 


9.1 Hose <onne<tion to XR24, XR 24II, 
XR 24 NOVA or to XR 24 PRO 


with serial number up to T005999 




The regeneration connection is 
effected using the nozzles to the tank 
at 16E and 16F, see figs. 6 and 7. 


• The connecting hose from the Regeneration 
Unit for developer (black) (13) and fixer 
(red) (14) must be slipped through the 
prepared holes on the rear of the machine 
and fed to the grey connecting sleeves 
(16E) and (16F) on the baths. 


• Uncsrew the locking nuts (18) on the 
connectors (16E) and (16F). 



• Remove the black plugs (20). Slide the 
locking nuts (18) and the grey hose 
locking ring (19) onto the connecting hose 

(13) , and (14). Slide the connecting hose 
for developer (black) (13) and fixer (red) 

(14) all the way onto the appropriate 
connector sleeve, (16E) and (16F), of the 
bath and secure in place with the locking 
nut (18). 

E Developer bath F Fixer bath 

9.2 Hose connection to XR 24 PRO 

with serial number from T006000 

a The tank design has been optimised 
and the regeneration connection is 
effected at the inlet pipe, see fig. 7a. 
Use the assembly set 1700-284-00 ‘‘inlet 
pipe for regeneration unit” with enclosed 
assembly instructions. 



10 



















































































15a 



15a 


10. Electrical connections 

10.1 XR 24, XR 24 II, XR 24 NOVA 

• Place the appliance plug into the socket 
(15a) to the rear of the X-ray developer 
and secure in place with the locking screw. 


10.2 XR 24 PRO 


• Remove socket cap (15b) to the rear of the 
X-ray developer. 

• Use the connection port (15a) from the 
assembly set provided - 1700-284-00. 

• Put connection port into the prepared 
opening using the 4 screws. 



• Connect the cable set as illustrated (Fig. 9). 



• Place the Regeneration Unit plug in the 
socket and secure in place with the locking 
screw. 


15b 


Circuit diagram XR 24 PRO 


X1/X2 Plug 

X3 Regeneration Unit 



11 

































































































































11. Setting the 

Regeneration Electronics 

A Before setting, fill the X-ray devel¬ 
oper baths with water. 




The pump running time should be set 
according to the individual require¬ 
ments of the surgery. 

We recommend, for example, that 
where a large number of films are de¬ 
veloped the regeneration time should 
be lowered in order to avoid unne¬ 
cessary consumption of chemicals. 


11.1 XR 24 


Switch „S1“ ON / OFF: 



• If switch (22) is set to OFF, regeneration 
will take place after 1.3m of developed film. 

• If switch (22) is set to ON, then 
additionally regeneration will take place 
every time the appliance is switched on. 

Switch „S1“ 50% / 100%: 

• If switch (21) is set to 100%, then the 
maximum pump running time of the 
Regeneration Unit is 60s. 

• By turning the switch (21) to 50% then the 
maximum pump running time of the 
Regeneration Unit is halved to 30s. 

Potentiometer „REG“ regeneration time 

The amount of chemical transported to the 
X-ray developer depends on the pump 
running time of the Regeneration Unit. 

The potentiometer (23) can be used to set 
the pump time from >0s to <60s (<30s). 

The pump operating time is factory-set at 
30s. In this time approx. 190ml fresh 
developer and fresh fixer are pumped to the 
baths of the X-ray developer. If further 
adjustment is necessary the potentiometer 
knob (23) can be used to change the pump 
operating time. 


12 
































11.2 XR 24 II and XR 24 NOVA 


The controller for the Regeneration Unit of 
XR 24 II and XR 24 Nova is not integrated 
into the main board. For these models the 
controller can be found on the PCB (24), 
Order No. 1700-212-00, which is slotted onto 
the main board. 

The slots for this printed circuit board can be 
found in the upper left corner of the main 
board, and are marked X13 and X14. 



Before slottting PCB into position 
(24) remove power supply to the 
X-ray developer. 


Setting for regeneration and pump operating 
time are carried out on the PCB (24). 




Switch „X3“ 

Regeneration on appliance operation ON/ 

OFF 

• If switch (27) is set to ON, regeneration on 
appliance operation is additionally 
activated and when the X-ray developer is 
switched on regeneration occurs. 

• If switch (27) is set to OFF, regeneration 
occurs only after 1.3m of film has been 
developed. 

Switch „X4“ 50% / 100% 

• If switch (26) is set to 60s then the 
maximum pump running time of the 
Regeneration Unit is 60s. 

• If switch (26) is set to 30s then the 
maximum pump running time of the 
Regeneration Unit is halved to 30s. 


Potentiometer PI Reg.-time 

The amount of chemical transported to the 
X-ray developer depends on the pump 
running time of the Regeneration Unit. 

The potentiometer (28) can be used to set 
the pump time from >0s to <60s (<30s). 

The pump operating time is factory-set at 
30s. In this time approx. 190ml fresh 
developer and fresh fixer are pumped to the 
X-ray developer baths. If further adjustment 
is necessary the potentiometer knob (28) 
can be used to change the pump operating 
time. 


13 










The regeneration function ON / OFF and the 
regeneration time can be read on the display 
of the X-ray developer (Fig. 14). 

Please refer to the Installation and Operating 
Instructions of the X-ray developer 
XR 24 PRO (order no. 9000-600-74/30) 

See section 18.6 Service Routine. 

• Start Service Routine 

® Switch off appliance at main switch 

(press min. 2 s) 

Simultaneously press + (Enter) 

(min. 4s) Appliance is in service set-up 
routine 

• Service function selection 

Using keys and display select 
REGENERATE, then select REGEN.ON. 

• Alter setting 

(Factory setting 30s) 

(+) or O changes the parameter value 
(Enter) confirms new value 


• Finish service set-up routine 

(5) Switch off appliance at main switch 
(press min. 2 s) 


14 





















12. Check Settings 

12.1 XR 24, XR 24 II, XR 24 NOVA 

Check regeneration at start of operation 

• Main switch ON 

• When the appliance is switched on the 
Regeneration Unit must be activated and 
developer and fixer will be pumped to the 
baths of the X-ray developer. 

• Check the appliance for leaks. 

Check regeneration impulse for film 

length 

• Main switch ON 

• Set fast forward to ON (film transport set to 
3 min.). Lay a film in the film intake such 
that the film intake flap is activated but so 
that the film is not transported. After 
approx. 8 min. the regeneration pumps 
should switch on and developer and fixer 
should be pumped into the baths of the 
X-ray developer. 

• Check the appliance for leaks. 

Check regeneration pump performance 

The developer and fixer pumps 
should transport the same amount of 
liquid into the baths of the X-ray 
developer. 

• Fill two measuring beakers with the same 
amount of water (approx. 0.5 liter). Place 
these in the Regeneration Unit and place 
the two hoses from the regeneration 
containers into the measuring beakers. 
Check that the pumps feed the identical 
amount of water. 

If necessary alter the pump transport 
settings. 

See section 13. Setting regeneration 
pump piston stroke. 



12.2 XR 24 PRO 

a A processor in the electronics of the 
XR 24 PRO stores the complete 
developing time, therefore setting 
option selection is not required. 


Check regeneration impulse for film 
length 

• Switch on the X-ray developer and select 
program „Endo“ (film transport time 2:45 
min.). 

• Lay a film in the film intake such that the film 
intake flap is activated but so that the film is 
not transported. After approx. 7 1/2 min. 
the regeneration pumps should switch on 
and developer and fixer should be 
pumped into the baths of the X-ray 
developer. 



• Check the appliance for leaks. 


Check regeneration pump performance 



The developer and fixer pumps 
should transport the same amount of 
liquid into the baths of the X-ray 
developer. 


• Fill two measuring beakers with the same 
amount of water (approx. 0.5 liter). Place 
these in the Regeneration Unit and place 
the two hoses from the regeneration 
containers into the measuring beakers. 


• The pumps can be activated via the 
Service Routine of the XR 24 PRO, in order 
to check the amount of liquids transported. 



(Please refer to the Installation and 
Operating Instructions of the X-ray 
developer XR 24 PRO, Order No. 
9000-600-74/30. Section 18.6 
Service Routine) 


15 




29 


30 


13. Setting Regeneration 
Pump Piston Stroke 

The amount of chemicals actually transported 
by the Regeneration Unit can be adjusted by 
altering the setting of the piston stroke. 

If the amounts pumped by the developer 
pump and the fixer pump are not the same 
then this can be regulated by altering the 
piston stroke of each pump. 

• Loosen the socket screw (30). 

• Use a screwdriver or spanner to turn the 
hexagonal screw (29) to change the piston 
stroke setting: 

Turning in the direction 100% = the amount 
pumped increases 

Turning in the direction 0% = the amount 
pumped decreases. 

The optimal pump volume is factory 
set (Fig. 15). 



• Finally, tighten the hex. socket screw (30). 


14. Commissioning 


• After finishing all re-setting that may be 
necessary drain all water from the baths in 
the regeneration unit of the X-ray 
developers and place the chemicals into 
position as appropriate for the model of 
X-ray developer and according to the 
Installation and Operating Instructions of 
that model. 


A The X-ray developer should never 
be operated without the roller set! 

If a roller set is missing then it is 
possible for developer and/or fixer to 
be forced under pressure vertically 
and spray out of the X-ray developer. 

Chemicals irritate eyes and skin 
and there is danger of severe 
damage to the eyes. 

Without the developer and fixer roller 
sets transport of chemicals to the 
baths is no longer possible. 

There is danger of chemicals 
getting in the eyes and of 
chemicals mixing together. 


16 


If chemicals get into eyes, wash 
thoroughly with water and consult 
doctor. 














OPERATION 


15. Cleaning the 
Regeneration Unit 

Every 3 months 

• Check whether the collection container of 
the X-ray developer is empty, if necessary 
empty into the main canisters. 

It is important that these collection 
containers are empty, otherwise 
overflowing may result when the 
chemicals are drained from the 
baths. 

• Drain the chemicals from the baths of the 
X-ray developers and empty the Regene¬ 
ration Unit containers and rinse throroughly 
with warm water. Fill the appliance and the 
regeneration unit containers with warm 
water and close the top cover. 

• Now refer to the operating instructions of 
the appropriate model of X-ray developer 
for next steps: See section 15.1 or 15.2. 

15.1 XR 24, XR 24 II, XR 24 NOVA 

Regeneration on operation activated 

• Switch the X-ray developer on and wait 
until the pumps of the Regeneration Unit 
have begun operation. Finally switch off the 
X-ray developer. 

m Repeat this operation at least 4 times, 
so that the Regeneration Unit (pumps 
and hoses) are thoroughly rinsed 
through. 

• Once the appliance is again in Stand-By 
Phase (lifting bath in upper position) turn 
off at main switch. 

Regeneration on operation deactivated 
• Switch the X-ray developer on and select 
fast forward operation. 

• Lay a film in the film intake such that the film 
intake flap is activated but so that the film is 
not transported. 

• Wait approx. 30 min., until the Regeneration 
Unit has operated 4 times. Remove the film 
from the film intake and let the cycle 
continue til the end (lifting bath in upper 
position). 

• Switch off X-ray developer. 



15.2 XR 24 PRO 


• Switch on the X-ray developer and select 
program „Endo“ (film transport time 3 
min.). 

• Lay a film in the film intake such that the film 
intake flap is activated but so that the film is 
not transported. 

• Wait approx. 30 min., until the Regeneration 
Unit has operated 4 times. Remove the film 
from the film intake and let the cycle 
continue til the end (lifting bath in upper 
position). 



• Switch off X-ray developer. 


16. Cleaning the X*ray 
Developer 

Every 3 months 

Change chemicals (See Installation and 
Operating Instructions 9000-600-74/30) 

Chemical cleaning of roller sets in 
cleaning bath, see enclosed notes, A3- 
Poster 

9000-600-14/01 

or 

Instructions for Cleaning Roller Sets 
9000-600-22 (included with XR Clean-Set). 

17. Disposal of Chemicals 

A When disposing of developer and 
fixer observe all local and regional 
regulations! 

In Germany and many other 
countries X-ray chemicals must be 
disposed of as special waste. 


17 



TROUBLESHOOTING 


The following descriptions of troubleshooting procedures are designed for technical 
staff only. Repairs may only be carried out by Durr Dental or by a person or agency 
authorised by Durr Dental. 

Before carrying out any repair or maintenance procedures remove power supply! 


18. Troubleshooting Tips for XR 24, XR 24II, XR 24 NOVA 


Fault 

Possible <auses 

Remedy 

1. Regeneration 
containers are 
empty after only 
a few hours 

• Frequent use of the appliance 
main switch, surgery mains 
switch or constant interruption of 
power supply. (Only when 
Regeneration on Operation 
activated) 

• Switch off the machine only during 
the midday break and keep on 
Stand-By during working hours. 


• Electronic relay K3 (of XR24) 
sticks or electronics defect. 

• Clean contacts or replace 
electronics. 

(Order No. 1700-210-52) 

2.Films not fixed 
completely and 
veil on film 

• Regeneration containers empty. 

• Refill the regeneration containers 
and repeatedly restart at main 
appliance switch using the 
regeneration on operation function. 

If there is still no improvement 
replace all chemicals in the machine. 


• Pump operating time too short. 

• Pump operating time needs 
adjusting via potentiometer. 


• Regeneration containers or their 
hoses are interchanged. 

• Drain chemicals from the machine 
and clean thoroughly. Connect the 
regeneration containers in the 
correct positions and refill with fresh 
chemicals. 


• Non-return valve of regeneration 
pump stuck or wrongly 
positioned. 

• Clean non-return valve, replace if 
required. 

Check for correct positioning 


• Regeneration hoses (from the 
Regeneration Unit to the X-ray 
developer) twisted. 

• Lay the hoses with no twists or 
bends. 


• Film shelf-life exceeded. 

• Observe film shelf-life date. 


• Chemicals shelf-life exceeded. 

• Observe chemicals shelf-life date. If 
shelf-life of chemicals is exceeded 
do not use and dispose of 
appropriately. 


18 


3.Regeneration 
pump not 
working 


• Light barrier on the drive shaft 
(XR24), tachometer generator 
(XR24-II) or electronics defect. 


• Cable connections to Regenerati¬ 
on Unit loose or disconnected. 

• Regeneration pump motor 
blocked. 

• Regeneration time at 
potentiometer set at Os. 


19. Troubleshooting Tips XR 24 PRO 


The impulse of the light barrier can 
be checked via Service PCB XR24 
(Order No. 1700-031-00); check 
impulse of the LED drive motor 
(XR24-II) or replace electronics. 

Check all cable connections. 

Check the motor for any mechanical 
faults (e.g. turn the fan wheel). 

Set potentiometer to ca. 30s and 
check amount of regeneration 
material pumped. 



Fault Possible tauses 


Remedy 


1. Regeneration 
containers are 
empty after only 
a few hours 

2. Films not fixed 
completely and 
veil on film 


• Regeneration time set too long. • Check regeneration timer setting. 

• Electronics do not switch off. • Replace electronic parts. 


• Regeneration containers empty. 


• Pump operating time too short. 

• Regeneration containers or their 
hoses are interchanged. 


• Non-return valve of regeneration 
pump stuck or wrongly 
positioned. 

• Regeneration hoses (from the 
Regeneration Unit to the X-ray 
developer) twisted. 

• Film shelf-life exceeded. 

• Chemicals shelf-life exceeded. 


• Refill the regeneration containers. If 
there is still no improvement replace 
all chemicals in the machine. 

• Re-set pump operating time at 
higher value. 

• Drain chemicals from the machine 
and clean thoroughly. Connect the 
regeneration containers in the 
correct positions and refill with fresh 
chemicals. 

• Clean non-return valve, replace if 
required. 

Check for correct positioning 

• Lay the hoses with no twists or 
bends. 

• Observe film shelf-life date. 

• Observe chemicals shelf-life date. If 
shelf-life of chemicals is exceeded 
do not use and dispose of 
appropriately. 


3.Regeneration 
pump not 
working 


• Motor tachometer generator or 
electronics defect. 

• Cable connections to Regenerati¬ 
on Unit loose or disconnected. 

• Regeneration pump motor 
blocked. 


• Check the impulses of the light 
barrier and the impulses of the roller 
drive or replace electronics. 

• Check all cable connections. 

• Check the motor for any mechanical 
faults (e.g. turn the fan wheel). 


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