TROUBLESHOOTING
18
Water in discharge
air / tank
Normal operation. The
amount of water increases
with humid weather
1. Drain tank more often. At least daily.
2. Add a filter to reduce the amount of water in the
air line.
Motor hums and
runs slowly or not
at all
1. Low voltage
1. Check incoming voltage. It should be
approximately 230 volts. Motor will not run
properly on 208 volts. Low voltage could
be due to wires (from electrical source to
compressor) being too small in diameter and /
or too long. Have a qualified electrician check
these conditions and make repairs as needed.
2. Use of extension cord
2. Do not use an extension cord. Use longer air
hose with larger diameter.
3. Too many devices on
same circuit
3. Limit the circuit to the use of compressor only
4. Loose electrical
connections
4. Check all electrical connections.
5. Malfunctioning pressure
switch - contacts will not
close
5. Replace pressure switch.
6. Malfunctioning check
valve
6. Replace check valve.
Risk of Explosion.
Do not
disassemble check valve with air
pressure in tank.
DANGER
7. Defective unloader valve
on pressure switch
7. Replace unloader valve.
8. Defective motor
capacitor(s)
8. Replace capacitor(s).
9. Defective motor
9. Replace motor.
Reset mechanism
cuts out repeatedly
or circuit breaker
trips repeatedly
1. Lack of proper
ventilation / room
temperature too high
1. Move compressor to well-ventilated area.
2. Too many devices on
same circuit
2. Limit the circuit to the use of only the air
compressor.
3. Restricted air intake
3. Clean or replace filter element.
4. Loose electrical
connection
4. Check all electrical connections.
5. Pressure switch shut-off
pressure set too high
5. Replace pressure switch.
PROBLEM
POSSIBLE CAUSE
CORRECTIVE ACTION
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