TROUBLESHOOTING
20
NP-DK50 DS-23_08-2018
6. TROUBLESHOOTING
Prior to servicing the equipment, reduce the pressure in the air tank to
zero and disconnect the equipment from the main power supply.
Only trained service personnel can perform the activities listed in the
troubleshooting guide.
PROBLEM
POTENTIAL CAUSE
SOLVING COMMON PROBLEMS
Compressor does
not start
There is pressure in the air tank
In STANDBY mode, the compressor starts
when pressure decreases
No main power voltage
Switched off main breaker in distribution system
Check supply
Replace a defective fuse
Loose wire terminal
– tighten
Power cord defective
– replace
Interrupted winding of motor, damaged
thermal protection
Replace motor
Defective capacitor
Replace capacitor
Jammed piston or other part
Replace damaged parts
DRYING indicator
lights yellow
permanently
Leakage of air from pneumatic
distribution system
Inspect pneumatic distribution system
– seal
loose connection
Large consumption of compressed air
Do not exceed max. flow (see Technical data)
Worn out piston rings
Replace worn out piston rings
Dirty air suction filter
Replace the dirty air suction filter
Dirty air intake filter
Clean or replace the dirty air intake filter
PRESSURE
alarm is activated
permanently
Leakage of air from pneumatic
distribution system
Inspect the pneumatic distribution system
–
seal loose connection
Large consumption of compressed air
Do not exceed max. flow (see Technical data)
Worn out piston rings
Replace worn out piston rings
Dirty air suction filter
Replace the dirty air suction filter
Dirty air intake filter
Clean or replace the dirty air intake filter
Dirty filter inserts of filter
Replace the dirty inserts
TEMP alarm is
activated
Dirty air blow down filter
Clean or replace the dirty air blow down filter
Covered vent holes
Uncover vent holes
Cooling fans don’t work
Replace fans
Unit is hot, unventilated area
Relocate unit
Compressor is
noisy (knocking,
metal noises)
Damaged piston bearing or bearing in
motor
Replace damaged bearing
Loose (cracked) belt of the air pump
hanger
Replace damaged hanger
Water coming out
of outlets
Dirty water trap in filter and filter
regulator
Clean or replace the water trap
Compressor
malfunction
Failure of control unit
Adjust using service software
