8 Problem solving
Warning
Before carrying out any maintenance, repair work or adjustment, stop compressor, wait
3 minutes and close the air outlet valve.
Press the test button on top of the electronic water drain until the air system between
the air receiver and outlet valve is fully depressurized.
Press the emergency stop button and switch off the voltage.
Depressurise the compressor by opening the oil filler plug one turn.
For location of components, see sections:
• Introduction
• Condensate system
• Operation instructions
• Preventive maintenance schedule
Open and lock the isolating switch.
Lock the air outlet valve during maintenance or repair as follows:
• Close the valve.
• Remove the screw fixing the handle with the wrench delivered with the
compressor.
• Lift the handle and turn it until the slot of the handle fits over the blocking edge on
the valve body.
• Fit the screw.
The operator must apply all relevant Safety precautions.
The low-load alarm is a counter-measure that verifies how much the element outlet
temperature is below the condensation point. This can lead to an accumulation of
condensate in the oil circuit and damage the compressor. The risk increases
significantly when the compressor is running majority of the time below the 40% load
regime. The alarm will reset automatically as soon as the machine has run a sufficient
time above the condensation point. If this alarm occurs frequently, please contact your
supplier.
Before electrical maintenance
Wait for at least 10 minutes before starting any electrical repairs as dangerous high
voltage remains on the capacitors of the start and speed regulation unit during some
minutes after switching off the voltage.
On VSD+ units, wait for at least 10 minutes before starting any electrical repairs as
dangerous high voltage remains on the capacitors of the start and speed regulation unit
during some minutes after switching off the voltage.
Faults and remedies, compressor
If the alarm LED is lit or flashes, consult sections Event history menu or Service menu.
If the alarm LED is lit or flashes, consult section Service menu.
Condition Fault Remedy
Condensate is not discharged from
condensate separator during
loading
Discharge flexible clogged Check and correct as
necessary.
Instruction book
2920 7110 05 97
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