TROUBLESHOOTING CHART
NOTE:
Troubleshooting problems may have similar causes and solutions.
PROBLEM POSSIBLE
CAUSE
SOLUTION
Motor will not
run or start
Power cord not plugged in
Plug cord into grounded outlet
Pressure Switch in “OFF” position
Turn switch to “ON” position
Wrong gauge wire or length of
extension cord
Check chart on page 2 for proper gauge wire and cord
length
Motor thermal overload switch
tripped
Turn air compressor off, wait until motor is cool, then
check motor circuit breaker
Fuse blown or circuit breaker
tripped
-Replace fuse or reset circuit breaker
-Check for proper fuse amperage
-Check for low voltage conditions
-Disconnect any other electrical appliances from circuit
or operate compressor on its branch circuit
Air tank pressure exceeds preset
pressure switch limit
Motor will start automatically when tank pressure drops
below tank cut-in pressure.
Check valve stuck open
Remove and clean or replace
Loose electrical connections
Contact authorized service center
Possible defective motor, capacitor
or check valve
Contact authorized service center
Motor runs
continuously
when in the
Start/Stop option
Pressure switch does not shut off
motor when air compressor
reaches cut-out pressure and
safety relief valve activates
Move the pressure switch to the OFF position. If the
motor does not shut off, unplug the air compressor. If the
electrical contacts are welded together, replace the
pressure switch.
Air compressor not large enough
Check air requirement of accessory used. If it is higher
than CFM and pressure supplied by compressor, a
larger compressor is needed. Most accessories are
rated at 25% of actual CFM while running continuously.
Regulator does
not regulate
pressure
Dirty or damage regulator
internal parts.
Replace regulator.
Low pressure
or not enough
air
Fittings leak
Check fittings with soapy water. Tighten or reseal
leaking fittings. But do not over tighten.
Tank drain valve is open
Close drain valve
Restricted air intake
Clean or replace air filter element.
Prolonged or excessive use of air
Decrease amount of air used
Hole in air hose
Check and replace if necessary
Tank leaks
WARNING
：
Replace unit immediately. DO NOT attempt to repair.
Valve leaks
Check and replace worn parts.
Moisture in
discharge air
Condensation in air tank caused by
high level of atmospheric humidity
or air compressor did not run long
enough.
Drain air tank after each use. Drain air tank more often
in humid weather and use an air line filter.
Overheating
Poor ventilation
Relocate compressor to an area with cool, dry and
well-circulated air.
Dirty cooling surfaces
Clean all cooling surfaces of pump and motor
thoroughly.
Leaking valve
Replace worn parts and reassemble with new seals.
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