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Troubleshooting
TROUBLESHOOTING CHART
troubleshooting
PROBLEM
POSSIBLE CAUSE
SOLUTION
Excessive
current draw
trips circuit
breaker of
motor reset
switch
Low voltage/motor
overload
Check that power supply is
adequate and that compressor
is on a dedicated circuit. If using
extension cord, try using without.
If compressor is connected to a
circut protected by a fuse, use
dual element time delay fuses
(Buss Fusetron type “T” only).
Drive belt too tight
Readjust belt tension
Restricted air passages
Inspect and replace transfer
tubes or check valve, as required.
Compressor
stalls
Low voltage motor
Furnish adequate power.
Bad check valve
Replace the check valve.
Seized pump
Contact authorized service
center.
Low discharge
pressure
Air leaks
Tighten or replace leaking fittings
or connections. Do not
overtighten.
Leaking valves
Contact authorized service
center.
Restricted air intake
Clean or replace air filter
element(s).
Blown gaskets
Contact authorized service
center.
Worn piston rings or
cylinder
Contact authorized service
center.
Compressor
pump
knocking
Loose engine pulley or
compressor flywheel
Retighten pulley and flywheel.
Check alignment.
Low oil level in pump
crankcase
Keep oil at proper level at all
times.
Excess carbon on valves
or top of piston
Contact authorized service
center.
Oil in discharge
air
Worn piston rings or
cylinder
Contact authorized service
center.
Restricted air intake
Clean or replace the air filter
element(s).
Oil level too high
Reduce to proper level.
