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Failure
Possible Cause
Corrective Action
Low pressure,
not enough air, or
compressor does
not stop.
Tank drain valve is open.
Close drain valve.
Fittings leak.
Check fittings with soapy water.
Restricted air intake.
Clean or replace intake filter element.
Prolonged excessive use of air.
Decrease amount of air used.
Compressor is not large enough.
Check air requirement for the
accessory. If it is higher than the CFM
and pressure supplied by the
compressor, you need a larger
compressor. Most accessories are
rated at 25% of actual CFM while
running continuously.
Hole in air hose.
Check and replace if necessary.
Tank leaks.
Immediately replace tank.
DO NOT attempt to repair.
Blown seals.
Replace seals.
Valve leaks.
Replace seals.
Leaking or worn piston.
Replace piston.
Air leaks from
regulator or
regulator does
not regulate
pressure.
Dirty or damaged regulator internal
parts.
Replace regulator or internal parts.
Regulated
pressure gauge
reading drops
when air
accessory is
being used.
This is normal.
If pressure drops too low, adjust
regulator while accessory is used.
Compressor not large enough.
Check air requirement of the accessory.
If it is higher than the CFM and the
pressure supplied by the compressor,
you need a larger compressor. Most
accessories are rated at 25% of actual
CFM while running continuously.
Pressure relief
valve opens.
Tank pressure exceeded normal
operating pressure.
Replace pressure switch.
Motor will not run.
Tank pressure exceeds preset pressure
switch limit.
Motor will start automatically when tank
pressure drops below cut- in pressure of
pressure tank.
Make sure the Thermal Overload Switch
has not tripped. The motor has a built-in
thermal cut-out that trips when necessary
to protect the motor from damage when
overheated.
Fuse blown or circuit breaker tripped.
To reset the motor overload toggle, turn
the power switch to the OFF position and
unplug the unit from the power outlet.
Allow 10 minutes (minimum) for the
motor overload cut-out to cool and reset.
Unit can then be plugged in and re-
started.
•
Replace blown fuse or reset
circuit breaker.
•
Do not use fuse or circuit breaker
with higher rating than specified
for your branch circuit.
