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08785150
Troubleshooting
Improper Discharge Pressure
If discharge pressure is too low, check the following:
I. Too much air demand. (Air tools required
more air than the compressor can produce, air
tools are free wheeling without resistance.)
II. Service valve is wide open to atmosphere.
III. Leaks in service line.
IV. Restricted compressor inlet air filter.
V. Faulty control system operation (i.e. regulator
is sending a signal to close the inlet valve at
all times).
VI. Low engine speed
VII. Worn, damaged, or improperly tensioned
belts.
If discharge pressure is too high or the safety valve
blows, check the following:
I. Oil separator plugged or blocked.
II. Faulty safety valve.
III. Faulty regulator or set too high
IV. Inlet valve leaking or partially open. Loss of
pressure signal to inlet valve from regulator
causing inlet valve to stay open.
Coalescer Plugging
If the coalescer element has to be replaced frequently
because it is plugging, it is an indication that foreign
material may be entering the compressor inlet or the
compressor oil is breaking down.
Compressor oil can break down prematurely for a
number of reasons:
I. Extreme operating temperature.
II. Negligence in draining condensate from oil
sump.
III. Using the improper type of oil or dirty oil.
Oil Consumption
Abnormal oil consumption or oil in service line can
be caused by the following:
I. Overfilling of oil sump.
II. Leaking oil lines or oil cooler.
III. Plugged return line
IV. Defective separator element
V. Compressor shaft seal leakage.
VI. Discharge pressure below 55 PSI
Relieving pressure too quickly after shutdown will
cause the oil to foam and spill out of the blow down
valve.
High Compressor Discharge
Temperature
If the compressor shuts down on high temperature,
check the following:
I. Check compressor oil level. Add oil if
required.
II. Check electric fan and switch.
III. Clean outside of oil cooler.
IV. Clean oil system (cooler) internally.
V. Plugged compressor oil filter.
VI. Plugged return line.
Summary of Contents for Gulfstream 35
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