EKOM DK50 4VR/50, Installation, Operation And Maintenance Manual

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