8 Problem solving
8.1 Faults and remedies
Warnings
•
Before starting any maintenance or repairs, stop the compressor, wait until it has
stopped.
•
Close the air outlet valve and press the test button on top of the electronic water drains
to depressurize the air system.
•
Open the isolating switch (customer's installation) to switch off the voltage to the
compressor.
•
Apply all relevant “Safety precautions”.
Problem solving, compressor
Condition Fault Remedy
Compressor capacity or working
pressure lower than normal
Air consumption exceeds capacity
of compressor
Check pneumatic plant
Safety valves leaking Remove leaking valve and have it
inspected
Oil pressure too low Oil level too low Top up level to the middle of the oil
level sight-glass
Oil filter clogged Replace filter
Air temperature above normal Inlet temperature too high due to
bad room ventilation or
recirculation of cooling air
Improve ventilation of compressor
room and avoid cooling air
recirculation
Air filter clogged Replace filter
Insufficient cooling water flow Check water temperature and
increase cooling water flow
Restriction in cooling water
system due to formation of scale
or settling down of dirt
Consult Atlas Copco
Condensate is not discharged
from condensate traps during
operation
Discharge flexible clogged Check and correct as necessary
Electronic water drain
malfunctioning
Consult Atlas Copco
LED's of electronic water drain do
not light up
Compressor is running unloaded LED's will light up when the
compressor is loaded again.
Power supply to EWD's faulty Check power supply. Compare power
supply with voltage mentioned on
data label of EWD
Power supply board defective Check and replace as necessary
No condensate discharged when
pressing test button on EWD
System pressure lower than 0.8
bar(e)/11.6 psig
Load the compressor; as soon as the
system pressure exceeds 0.8 bar(e),
condensate will be discharged
Instruction book
123
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