14
TROUBLESHOOTING GUIDE
Problem Encountered
Possible Cause
Possible Solution
The compressor does not
start or restart:
The compressor motor
stalls:
Excessively noisy opera-
tion:
Power cord not plugged in.
Motor/Pressure switch in "OFF" position
Motor thermal overload switch has tripped.
Fuse blown or circuit breaker has tripped.
Wrong gauge wire or length of extension
cord.
Air tank pressure exceeds motor/pressure
switch "cut-in" pressure.
Pressure release valve on motor/pressure
switch has not unloaded pump head pres-
sure.
Defective motor, motor capacitor,
motor/pressure switch.
Overloaded motor.
Improper lubrication.
Low oil level.
Defective check valve.
Loose motor pulley or pump flywheel.
Lack of oil in the pump crankcase.
Carbon deposits on pistons or valves.
Bearing, piston or connecting rod failure.
Worn connecting rod.
Worn piston wrist pin bushing.
Worn bearings.
Noisy check valve.
Plug cord into grounded outlet.
Move switch to "AUTO" position.
Turn air compressor off, wait until the motor is cool,
then press motor thermal overload (red) button firm-
ly until click is heard.
Replace fuse or reset circuit breaker.
Check for proper fuse amperage.
Check for low voltage conditions.
Disconnect any other electrical appliances from cir-
cuit or operate air compressor on its own branch cir-
cuit.
Check chart in instruction manual for proper gauge
wire and cord length.
Motor will start automatically when air tank pressure
drops below "cut-in" pressure of motor/pressure
switch.
Bleed the line by moving the switch to the "OFF"
position.
Contact Factory Customer Service at
1-800-423-3598.
Have a certified electrician check the motor and
wiring, then proceed with his or her recommenda-
tions.
See LUBRICATION section in instruction manual.
Check oil level and fill if necessary.
Replace check valve.
Tighten pulley and/or flywheel (where applicable).
Check oil level. If low, check for possible bearing
damage. Add correct amount of oil.
Remove cylinder head and inspect. Clean or replace
parts as needed.
STOP THE COMPRESSOR! Contact Factory
Customer Service at 1-800-423-3598.
Replace with new connecting rod.
Remove piston/connecting rod assembly from the
compressor and inspect for excess wear. Replace
worn parts as needed.
Replace worn bearings as needed. Note: Dirty oil can
cause accelerated wear. Change oil frequently using
recommended oil.
Replace check valve.
Summary of Contents for Air-Plus 540025
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