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English
TROUBLESHOOTING
Problem
The compressor does not run.
The motor hums, but does not run or
runs slowly.
The fuses blow or the circuit breaker
trips repeatedly.
The thermal overload protector cuts
out repeatedly.
The air receiver pressure drops when
the compressor shuts off.
There is excessive moisture in the air
discharge.
Air is leaking from the compressor.
The compressor runs continuously.
The compressor vibrates.
The air output is lower than normal.
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Possible Cause
Loss of power or overheating.
There is no electrical power being supplied to
compressor or the power switch is in the OFF position.
A fuse has blown at the power supply.
A breaker has tripped at the power supply.
Thermal overload open.
The pressure switch is bad.
Tank is full of air.
The voltage from the power supply is low.
The gauge wire or the length of extension cord is wrong.
The motor winding is shorted or broken.
The unloader or check valve is defective.
The fuse size is incorrect or the circuit is overloaded.
The gauge wire or the length of extension cord is wrong.
The unloader or check valve is defective.
The voltage from the power supply is low.
A poorly ventilated room is causing the motor to
overheat.
The gauge wire or the length of extension cord is wrong.
The connections are loose or leaking (fittings, tubing,
etc.).
The drain valve is loose.
The check valve is leaking.
There is excessive water in the air tank.
The humidity is high.
The hose connection is loose or improperly sealed.
The air hose is broken or damaged.
The tank drain valve is open.
The pressure switch is defective.
The usage is excessive.
The compressor mounting bolts are loose.
The inlet valves are broken.
The connections are leaking.
Possible solution
Check for proper use of extension cord.
Check to be sure the compressor is plugged in and the
power switch is in the ON position.
Replace the fuse at the power supply.
Reset the breaker at the power supply and determine
why the problem happened.
First unplug the compressor and wait until it becomes
cool. Motor will restart when cool.
Replace the pressure switch.
Compressor will turn on when tank pressure drops to
cut-in pressure.
Check the voltage with a voltmeter.
Use the correct wire gauge and length extension cord.
Take the compressor to a service center.
Take the compressor to a service center.
Check the fuse or breaker at the power supply is the
correct size and type. Be sure to use only time-delay
fuses to avoid overloading a circuit, disconnect other
electrical appliances from circuit or operate compressor
on its own branch circuit.
Use the correct wire gauge and length extension cord.
Take the compressor to a service center.
Check the voltage with a voltmeter.
Move the compressor to well-ventilated area.
Check for proper gauge wire and cord length.
Check all the connections with soapy water and look
for bubbles. Tighten any loose connections until the
leak stops.
Tighten the drain valve.
Take the compressor to a service center.
WARNING: Do not disassemble
check valve while air is in tank
- empty the all the air out of the
tank before disassembly.
Drain the tank to remove water.
Move the compressor to an area of less humidity or use
an air line filter to reduce moisture discharge in the tank.
Ensure connections are sealed with thread sealing tape
and tightened.
Replace the air hose.
Ensure the tank drain valve is closed.
Take the compressor to a service center.
Decrease the amount of tool run-time; the compressor
is not large enough to supply the air requirement of
the tool.
Tighten mounting bolts.
Take the compressor to a service center.
Apply thread sealing tape to fitting and tighten.
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