15
PROBLEM
CAUSE
CORRECTION
The compressor does not run.
The tank has insufficient pressure.
There is no electrical power to the unit.
The circuit breaker has tripped or a fuse
has blown at the main power source.
The thermal overload protector is
actuated.
There is loss of power or overheating.
The pressure switch is bad.
When the tank pressure drops, the compressor will turn on to
cut-in pressure.
Verify the wiring connection inside the pressure switch and the
terminal box area.
Check the fuse/breaker to determine the underlying cause.
Turn the air compressor OFF.
Wait until the compressor cools down.
Depress the red reset button on the motor.
Turn the air compressor to AUTO.
Verify the wiring.
NOTE: Long lengths of electrical wiring could cause power loss
to the motor.
Replace the pressure switch.
The motor hums while running slowly,
or it does not run at all.
There is low voltage from the power
source.
There are loose electrical connections.
There is a shorted or open motor wiring.
There is a defective check valve or
unloader.
Check the voltage with a voltmeter.
Verify the wiring connections inside the pressure switch and
the terminal box area is secure.
Bring the compressor to a service center.
Bring the compressor to a service center.
The compressor is making squealing
sounds.
The compressor pump has no oil.
The belt is too loose.
Check the pump oil.
Check the belt tension.
The compressor is experiencing
restricted air intake
The air filter is dirty.
Clean or replace the air filter.
ENGLISH
TROUBLESHOOTING
WARNING:
Risk of Unsafe Operation. Unit cycles automatically when power is on. When servicing, you
may be exposed to voltage sources, compressed air, or moving parts. Before servicing unit, unplug or
disconnect electrical supply to the air compressor, bleed tank of pressure, and allow the air compressor
to cool.
Fuse blown, circuit breaker
tripped.
Check fuse box for blown fuse and replace as necessary. Reset circuit
breaker. Do not use a fuse or circuit breaker with higher rating than that
specified for your particular branch
circuit.
Check for proper fuse. You should use a time delay
fuse.
Check for low voltage
problem.
Check the extension cord.
Disconnect the other electrical appliances from circuit or operate the
compressor on its own branch
circuit.
Extension cord is wrong length or
gauge.
Check the extension cord.
Loose electrical connections.
Check wiring connection inside terminal
box.
Faulty motor.
Have checked by a Trained Service
Technician.
Motor overload protection switch
has tripped.
Refer to
Motor Overload Protector
under
Description of Operation
.
If motor overload protection trips frequently, contact a Trained
Service Technician.
