Quincy Compressor QSI 50, Инструкция, Страница: 80 / 92

Instruction book
2012 2039 28 80
8 Problem solving
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.
Depressurise the compressor by opening the oil filler plug one turn.
Open and lock the isolating switch.
The operator must apply all relevant Safety precautions.
Lockout/Tagout all power per OSHA Title 29 Code of Federal Regulations (CFR) Part
1910.147.
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.

Always switch off the voltage. Only pressing the emergency stop button is not
sufficient to make the compressor voltage free.

If the machine is equipped with an automatic restart after voltage failure function
and if this function is active, be aware that the machine will restart automatically
when the power is restored if it was running when the power was interrupted.
No. Condition Fault Remedy
1 Compressor starts
running, but does not
load after a delay time Solenoid valve out of order
Inlet valve stuck in closed
position
Replace valve
Have valve checked
Leak in control air flexible Replace leaking flexible
Minimum pressure valve leaking
(when net is depressurized) Have valve checked
2 Compressor does not
unload, safety valve
blows Solenoid valve out of order Replace valve
Inlet valve does not close Have valve checked
3 Compressor air output or
pressure below normal Air consumption exceeds air
delivery of compressor Check equipment connected
Choked air filter element Replace filter element
Solenoid valve malfunctioning Replace valve
Leak in control air flexible Replace leaking flexible
Inlet valve does not fully open Have valve checked
Oil separator clogged Air leakage Have element replaced Have
leaks repaired
Safety valve leaking Have valve replaced
Airend out of order Consult your supplier