18
Stationary Electric Air Compressor Manual
TROUBLESHOOTING
SYMPTOM
Air compressor will not start.
Air compressor will not start, but
motor hums, then stops.
Air compressor does not stop
even though the maximum pres-
sure allowed has been reached.
PROBABLE CAUSE
Motor/Pressure Switch turned
"OFF".
Motor Thermal Overload tripped
on air compressor.
Circuit breaker tripped or fuse
blown at power source.
Motor voltage does not match
power source.
Air tank pressure achieved the
"Maximum setting" or "Stop
pressure" of the Motor/Pressure
Switch.
Pressure release valve on Motor/
Pressure Switch has not unloaded
pump head pressure.
Pilot valve's check valve stuck
open.
Defective motor, or Motor/Pres-
sure Switch.
Low oil level (if unit is equipped
with Low Oil Sensor)
Loose electrical connection.
Too many appliances being oper-
ated on same circuit.
Incorrect voltage, incorrect sized
circuit breaker, fuse or motor.
Defective motor.
Defective Check Valve or Motor/
Pressure Switch.
Motor/Pressure Switch not oper-
ating correctly.
REMEDY
Move Motor/Pressure Switch to
"AUTO" position.
Turn unit off, wait 5 minutes, then
press Motor Thermal Overload
until click is heard.
Reset circuit breaker or replace
fuse if necessary, using only "Fu-
setron" type T fuses.
Check for low voltage conditions.
Disconnect any other electrical
appliances from circuit or operate
air compressor on its own branch
circuit.
Contact your Customer Service.
The motor will start automatically
when air tank pressure drops
down to the "Cut-in" or "Start"
pressure of the Motor/Pressure
Switch.
Contact your Customer Service.
Remove and clean or replace.
Contact your Customer Service.
Add oil to pump
Contact qualified electrician.
Use another circuit or remove
excess appliances from circuit.
Contact qualified electrician.
Replace.
Replace
