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DK50 

4VR/50

 

NP-DK50 4VR50-11_04-2018 

- 26 -    

04/2018

 

Troubleshooting can be performed only by qualified personnel. 

FAILURE 

POSSIBLE CAUSE 

REMEDY 

Compressor does not start  No voltage in pressure switch 

Check voltage in socket 
Check fuse – replace faulty one 
Loosen terminal – tighten it   
Check power cord – replace faulty one 

Disconnected  winding  of  motor,  damaged  thermal 
protection  
Faulty capacitor   
Seizure of piston or another rotary part Pressure 
switch does not switch on 

Replace motor or re-wind it 
 
Replace capacitor 
Replace damaged parts 
Check the function of pressure switch 

Compressor often  
switches on  

Air leak in pneumatic distribution system  
Leaking  check valve 
Greater  volume  of  condensed  liquid  in  pressure 
vessel    

Check pneumatic distribution system – seal loose joint  
Clean valve, replace seals, replace valve  
Drain condensed liquid  

Prolonged running of 
compressor   

Air leak in pneumatic  distribution system 
 
Worn piston ring 
Contaminated input filter and prefilter 
Dirty filter in the dryer 
Defective solenoid valve 

Check pneumatic distribution system  – seal loose joint  
Replace worn piston ring  
Replace contaminated filters with the new ones  
Change the outlet filter and inspect dessicant 
Repair or change the valve 

Compressor is noisy 
(knocking, metal noises) 

Damaged  bearing  of  piston,    piston  rod,  motor 
bearing  
Loose or cracked spring 

Replace damaged bearing  
 
Replace damaged spring   

Dryer doesn´t dry 
(condensed water in the 
tank)

 

Membrane dryer 

 

inoperative cooler ventilator   

replace ventilator  
check supply of electric energy      

Damaged dryer 

Replace dryer 

Dirty automatic condensate drain on filters 

clean / replace 

Dirty filter and micro-filter elements  

Replace old elements with new elements 

 

NDM Dryer 

 

Decreased dew point 
performance 

1. Insufficient pressure at inlet 
2. Electrical failure 
3. Damp or contaminated dryer media 
4. Excessively high air consumption 
5. Excessive intlet air temperature 
6. Insufficient clean air 
7. Exhaust silencer blocked 

1. Inlet pressure must be at least 4 Bar. If this is not the 
case, adjust and set the inlet pressure. 
2. Ensure the equipment is switched on and the dryer's 
front panel is lit, check for proper dryer cycle. 
3. Remove the source of the contamination. Replace 
the cartridges – do not reuse. 
4. Ensure dryer performance matches required air 
demand. 
5. Check technical specifications. 
6. Cancel incorrect settings and contact a service 
technician – adjust settings. 
7. Contact a service technician. 

Dryer cycle failure

 

8. Controller malfunction

 

9. Lamp is not lit 
10. Insufficient inlet pressure

 

11. Venting malfunction during regeneration 
12. Output flow halted

 

8. Check to ensure controller has power, check the 
display to ensure the solenoid valves are powered in 
regular cyclical operation.

 

9. Check unit power and fuses

 

10. Inlet pressure must be at least 4 Bar. If this is not 
the case, adjust and set the inlet pressure.

 

11. If the solenoid valve has power and is 
malfunctioning – replace the valve. The valve is 
working properly if a click can be heard at the outlet 
when venting 
12. Check the air flow at the inlet.

 

Constant venting

 

13. Dryer run failure

 

14. Irregular air flow from exhaust 

 

13. Switch off and restart the dryer. Check to see if the 
dryer is under pressure before switching on – to ensure 
the dryer can be started before starting operation.

 

14. Defective or damaged valve, maintenance required

 

 
 

Summary of Contents for DK50 4VR/50

Page 1: ......

Page 2: ...5 TECHNICAL DATA 5 6 PRODUCT DESCRIPTION 6 7 FUNCTION 8 INSTALLATION 12 8 USE 12 9 INSTALLATION 12 10 WIRING DIAGRAMS 16 11 PNEUMATIC DIAGRAM 18 12 FIRST OPERATION 19 OPERATION 20 13 SWITCHING THE COM...

Page 3: ...rsion of the text prevails 2 2 General safety warnings The manufacturer developed and designed the equipment in such a way so that any risks were excluded if it is used according to intention The manu...

Page 4: ...age TEMPERATURE LIMITATIONS Handling mark on package LIMITED STACKING Mark on package RECYCLABLE MATERIAL 4 STORAGE AND TRANSPORT The compressor is shipped in cardboard that protects the appliance fro...

Page 5: ...70x1015 Dimensions with dryer W x L x H MD mm 580x635x790 NDM 580x635x790 Weight kg 70 128 Weight with dryer MD kg 81 139 NDM 89 147 Air dryer performance Atmospheric dew point MD C 20 Pressure dew po...

Page 6: ...independent installation in a suitable environment Dental compressors DK50 4VR 50 M are designed for independent installation in a suitable environment and are equipped with an air dryer MD NDM Denta...

Page 7: ...000 The regulator ensures a supply of output air at a constant pressure so long as the pressure value set on the regulator is not higher than the switching pressure set on the pressure switch Automati...

Page 8: ...into the air tank 2 The adsorbent media regenerates when the drying chamber is being evacuated always after the compressor is switched off by the pressure switch The air is then released from the ads...

Page 9: ...10 Compressor wheel 11 Hour meter 12 Dryer cooler 13 Plug 14 Membrane dryer MD 15 Micro filter 16 Filter 17 Check valve 18 Magnetic bracket 19 Plug 20 Condensate vessel 21 Outlet valve 22 Exhaust muff...

Page 10: ...DK50 4VR 50 NP DK50 4VR50 11_04 2018 10 04 2018 Fig 3 Compressor with adsorption dryer NDM...

Page 11: ...DK50 4VR 50 04 2018 11 NP DK50 4VR50 11_04 2018 Fig 4 Cabinet...

Page 12: ...Refer to the technical data of the product for this purpose When a unit is to be built in classification and evaluation of compatibility must be done by the manufacturer or supplier of the product to...

Page 13: ...e supporting bracket 30 in the front part of the cabinet Pass the pressure hose and mains plug from the compressor through the opening in the lower rear section of the cabinet Connect the cabinet conn...

Page 14: ...K50 4VR 50 M configuration to DK50 4VR 50S M or vice versa the following steps must be performed Prior to any maintenance or repair work switch off the compressor and disconnect it from the mains pull...

Page 15: ...M DK50 4VR 50S M to DK50 4VR 50 M install jumper Z jumper on use jumper Z Art 033190119 000 to make the connection to terminal strip X1 Fig 1 4 connect the cord to socket X2 Fig 5 X2 X3 DK50 4VR 50 M...

Page 16: ...ith the data stated on the appliance label Fig 8 Keep the socket easily accessible to ensure that in an emergency the appliance can be safely disconnected from the mains Connection to the power distri...

Page 17: ...PE I3 I4 I5 EKOM FLAIRMO ABSOLUTE TABULKA PREPOJOV PODLA ZAKAZNIKOV E5 X1 3 N L X3 2 1 4 3 5 2 1 4 3 6 5 04 03 A2 A1 Q11 M 6 150 C 1 3 2 4 2 1 p 40 C B1 B2 E1 E2 PE K1 3 N PE 400 V 50 Hz MAINS TN S T...

Page 18: ...essor without box Bridge OFF compressor with box 2 6 5 7 8 9 3 1 1 1 1 11 PNEUMATIC DIAGRAM DK50 4VR 50 1 Inlet filter 2 Compressor 3 Fan 5 Safety valve 6 Check valve 7 Pressure switch 8 Air tank 9 Pr...

Page 19: ...nt cabinet into the I position a lighted switch indicates the equipment is in operation Compressor At first operation the air tank is pressurized until it reaches a preset level when the compressor au...

Page 20: ...erconnect electric part of drier with compressor according to wiring diagram in accord with valid regional regulations Required drying performance can only be achieved when following the defined opera...

Page 21: ...pressure a From compressor start up until pressure reaches 5 5 bar b During operation if pressure drops below 5 1 bar 24 hour regeneration mode Dryer regeneration for 10 minutes is automatically switc...

Page 22: ...15 9 1 x every 2 years Conduct repeated test pursuant to EN 62353 14 1 x every 2 years or after 5000 hours Replace inlet filter and pre filter 15 5 NDM Replacement maintenance kit dryer 8 000 hours o...

Page 23: ...mpressor is operated for the first time make sure that the safety valve is working properly Turn screw 4 of safety valve 1 several rotations to the left until the safety valve releases air Let the saf...

Page 24: ...cro filter by pulling down 2 Rotate the vessel 2 and remove 3 Remove the filter 3 4 Install the new filter element 5 Reinstall the filter housing and rotate to secure it until the catch clicks Micro f...

Page 25: ...liance from the mains Release air pressure in the pressure tank by opening the drain valve 1 Fig 10 The components of the product are non toxic Dispose of the appliance following all environmental reg...

Page 26: ...automatic condensate drain on filters clean replace Dirty filter and micro filter elements Replace old elements with new elements NDM Dryer Decreased dew point performance 1 Insufficient pressure at...

Page 27: ...DK50 4VR 50 NP DK50 4VR50 11_04 2018 130 04 2018 NP DK50 4VR50 11_04 2018 112000123 000...

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