19
TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSE
CORRECTIVE ACTION
Reset mechanism
cuts out repeatedly
or circuit breaker
trips repeatedly
(Continued)
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. Malfunctioning motor
9. Replace motor.
Tank does not hold
pressure when
compressor is off
and the shut off
valve is closed
1. Air leaks (fittings, tubing
on compressor, or
plumbing outside system)
1. Check all connections with soap and water
solution. Tighten; or remove and apply sealant
to threads, then reassemble.
2. Worn check valve
2. Replace check valve.
Risk of Explosion.
Do not
disassemble check valve with air
pressure in tank.
DANGER
3. Check tank for cracks or
pin holes
3. Replace tank. Never repair a damaged tank.
Pressure switch
continuously
blows air out the
unloader valve
Malfunctioning check valve
Replace the check valve if the unloader valve on
the pressure switch bleeds off constantly when
unit shuts off.
Risk of Explosion.
Do not
disassemble check valve with air
pressure in tank.
DANGER
Excessive vibration 1. Loose fasteners on pump
or motor
1. Tighten fasteners.
2. Belt needs replaced
2. Replace with correct size.
3. Belt alignment
3. Align flywheel and pulley.
kobalttools.com
