20
Troubleshooting
For your own safety do not try
and run the air compressor
while troubleshooting.
!
WARNING:
TROUBLE
PROBABLE CAUSE
REMEDY
Compressor will not
run
Motor hums but can-
not run or runs slow-
ly
Fuses blow/circuit
breaker trips repeat-
edly
1. Unit is plugged into
extension cord
2. No electrical power
3. Blown fuse
4. Breaker open
5. Thermal overload open
6. Pressure switch bad
1. Low voltage
2. Unit is plugged into
extension cord
3. Shorted or open motor
winding
4. Defective check valve or
unloader
1. Incorrect size fuse, circuit
overloaded
2. Unit is plugged into
extension cord
3. Defective check valve or
unloader
1. Remove extension cord
2. Verify unit is plugged in.
Check fuse/breaker or
motor overload
3. Replace blown fuse
4. Reset, determining why
problem happened
5. Motor will restart when cool
6. Replace
1. Check with voltmeter
2. Remove extension cord
3. Replace motor
4. Replace or repair
1. Check for proper fuse, use
time-delay fuse.
Disconnect other electrical
appliances from circuit or
operate compressor on its
own branch circuit
2. Remove extension cord
3. Replace or repair
