8 Problem solving
Warning: Before carrying out any maintenance, repair work or adjustments, proceed as
follows:
• Stop the compressor.
• Switch off the voltage and open the isolating switch.
• Close the air outlet valve and open the manual condensate drain valves.
• Depressurize the compressor.
For detailed instructions, see the next sections.
The operator must apply all relevant Safety precautions during maintenance or repair.
Compressor
Condition Fault Remedy
The compressor
does not start.
Pressure too high.
Compressor will start again when
the pressure drops to the starting
pressure.
Loose connection. Check all electrical connections.
Safety valve blows.
Pressure too high. Check settings and correct.
Safety valve opens too soon. Replace valve.
Compressor capacity
or pressure below
normal.
Air consumption exceeds capacity of
compressor.
Check equipment connected.
Choked air inlet filter.
Remove and check filter. Replace if
necessary.
Safety valve leaking. Replace valve.
Compressor element out of order. Consult your supplier.
Compressor module
overheating or
compressor
shutdown on high air
temperature.
Insufficient compressor cooling.
Improve ventilation of compressor
room.
Clean compressor element fins and
fan.
Cooling fan out of order.
Check and correct.
Condensate trap
continuously
discharging air and
water.
Automatic drain out of order.
Have the drain checked. Replace as
necessary.
Refrigerant dryer
For Full-Feature units also:
Instruction book
2920 7219 10 73
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