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TROUBLESHOOTING
PROBLEM
Compressor will not run
Motor hums but cannot run or
runs slowly
Temperature overload protec-
tor cuts out repeatedly
Air tank pressure drops when
compressor shuts off
POSSIBLE CAUSE
Loss of power or overheating
No electrical power
Insufficient power from receptacle
Insufficient power from extension cord
Blown shop/house fuse
Shop/house breaker open
Temperature overload open
Pressure switch bad
Tank is full of air
Low voltage
Wrong gauge wire or length of extension
cord
Shorted or open motor winding
Defective check valve
Insufficient power from receptacle
Insufficient power from extension cord
Low voltage
Lack of proper ventilation/room temperature
too high
Wrong gauge wire or length of extension
cord
Insufficient power from extension cord
Loose connections (fittings, tubing, etc.)
Loose drain valve/open drain valve
Check valve leaking
14 – English
SOLUTION
Check for proper use of extension cord.
Check to be sure unit is plugged in. Check
fuse/breaker.
Use a receptacle on a different circuit.
Refer to chart on page 8 to choose an
appropriate extension cord.
Replace shop/house blown fuse. Use of a
time-delay fuse is recommended.
Reset shop/house breaker, determining why
problem happened.
Move compressor to well-ventilated area.
Unit must be unplugged and allowed to cool
for 30 minutes to initiate reset.
Take compressor to service center.
Compressor will turn on when tank pressure
drops to cut-in pressure.
Check with voltmeter.
Check for proper gauge wire and cord
length.
Take compressor to service center.
Take compressor to service center.
Use a receptacle on a different circuit.
Refer to chart on page 8 to choose an
appropriate extension cord.
Check with volt meter.
Move compressor to well-ventilated area.
Unit must be unplugged and allowed to cool
for 30 minutes to initiate reset.
Check for proper gauge wire and cord
length.
Refer to chart on page 8 to choose an
appropriate extension cord.
Check all connections with soap and water
solution and tighten.
Tighten drain valve/close drain valve.
Take compressor to service center.
DANGER:
Do not disassemble check valve,
tank drain valve, or safety valve
with air in tank — bleed tank.
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