Use and Care Manual

24
Problem Possible Cause Solution
The compressor does not
run.
□ The tank has insufficient
pressure.
□ When the tank pressure drops, the
compressor will turn on to cut-in
pressure.
□ There is no electrical
power to the unit.
□ Verify the wiring connection inside the
pressure switch and the terminal box
area.
□ The circuit breaker has
tripped or a fuse has blown
at the main power source.
□ Check the fuse/breaker to determine the
underlying cause.
□ The thermal overload
protector is actuated.
□ Turn the air compressor OFF ( O ).
□ Wait until the compressor cools down.
□ Depress the red reset button on the
motor.
□ Turn the air compressor to AUTO ( I ).
□ There is loss of power or
overheating.
□ Verify the wiring.
NOTE: Long lengths of electrical wiring
could cause power loss to the motor.
□ The pressure switch is bad. □ 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.
□ Check the voltage with a voltmeter.
□ There are loose electrical
connections.
□ Verify the wiring connections inside the
pressure switch and the terminal box
area is secure.
□ There is a shorted or open
motor wiring.
□ Bring the compressor to a service center.
□ There is a defective check
valve or unloader.
□ Bring the compressor to a service center.
The compressor is making
squealing sounds.
□ The compressor pump has
no oil.
□ Check the pump oil.
□ The belt is too loose. □ Check the belt tension.
The compressor is
experiencing restricted air
intake.
□ The air filter is dirty. □ Clean or replace the air filter.
The compressor is making
knocking sounds.
□ There is a loose pulley. □ Tighten the pulley set screws.
□ There is a loose flywheel. □ Tighten the flywheel screw.
□ The compressor mounting
screws are loose.
□ Tighten the mounting screws.
□ The belt is too loose. □ Check the belt tension.
□ An excessive amount of
carbon has built-up in the
pump.
□ Bring the compressor to a service center.
□ The belt is too tight. □ Check the belt tension.
Troubleshooting