Vmac RAPTAIR-G30, Service Manual

Page: 60 / 96

VMAC
– Vehicle Mounted Air Compressors
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58
Troubleshooting Table
Please isolate the G30 gas drive from all downstream
equipment for the following tests.
SYMPTOM POSSIBLE CAUSE CORRECTIVE ACTION
Compressor building
above set pressure
(Verified by pressure
gauge) or pressure
relief valve venting at
200 psi.
Pressure control tube
plugged or frozen.
Remove and clear the tube.
Defective Inlet or
Poppet O-ring.
Replace O-ring.
Defective inlet valve. Replace inlet assembly.
Plugged or restricted
Pressure Control
Tube.
Replace components as
needed.
SYMPTOM POSSIBLE CAUSE CORRECTIVE ACTION
Pressure relief valve
venting below 200 psi. Defective pressure
relief valve.
Replace pressure relief valve.
SYMPTOM POSSIBLE CAUSE CORRECTIVE ACTION
Compressor will not
build to set pressure
(Verified by pressure
gauge).
Pressure relief valve
leaking.
Replace pressure relief valve.
Excessive leakage
through Blowdown
muffler.
Replace muffler.
Plugged or dirty
compressor air filter.
Replace air filter.
Drive belt slipping. Check belt.
Leaks in air lines.
Replace components as
needed.
Defective downstream
equipment (Filter
Regulator Lubricator,
fittings, hose reel.
Replace as required with
suitable components.
Unloader valve
manually activated. Manually disengage unloader
valve.
SYMPTOM POSSIBLE CAUSE CORRECTIVE ACTION
Engine overheat
Low oil level.
Check oil level with
equipment on level ground.
Cooling intake plugged. Correct problem.
High ambient
temperatures.
Reduce duty cycle.
Insufficient ventilation. Correct problem.
Spark arrester fouled. Clean spark arrester.