Quincy Compressor QGS 40, Instruction Book

Page: 82 / 102

8 Problem solving
Warning
Before carrying out any maintenance, repair work or adjustment, press the stop button,
wait until the compressor has stopped, press the emergency stop button and switch off
the voltage. Close the air outlet valve and lock it if necessary.
Depressurize the air connection between the minimum pressure valve and the compressor
outlet ball valve. Turn slowly the air vent plug (Fa) just one turn to permit any pressure in
the system to escape.
If provided, open the manual condensate drain valves. Depressurise the compressor by
opening the oil filler plug one turn.
For location of components, see sections: Introduction and Initial start-up .
Open and lock the isolating switch.
The operator must apply all relevant Safety precautions .
Position of air vent plug
Compressor
On compressors equipped with an AIRLOGIC² controller: if the alarm LED is lit or flashes, consult sections
Main screen and following.
- Condition Fault Remedy
Compressor starts running, but
does not load after a delay time Solenoid valve out of order Replace valve
Inlet valve stuck in closed position Have valve checked
Leak in control air flexibles
Replace leaking flexible
Minimum pressure valve leaking
(when net is depressurised) Have valve checked
- Condition Fault Remedy
Compressor does not unload,
safety valve blows Solenoid valve out of order Replace valve
Inlet valve does not close Have valve checked
Instruction book
80 2920 7101 21