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Electric Air Compressor Manual 2004 13
TROUBLESHOOTING
3. When in the Start/Stop option, motor runs continuously.
REMEDY
Move the motor/pressure switch to the "Off" position.
If the motor doesn't shut off, unplug the air
compressor. If the electrical contacts are welded
together, replace the pressure switch.
Limit the air pressure to the capacity of the air
compressor. Either use a a smaller tool or a larger
air compressor.
PROBABLE CAUSE
Motor/Pressure switch does not shut off motor when
air compressor reaches "cut-out" pressure and safety
relief valve activates.
Air compressor is incorrectly sized.
SYMPTOM
4. Air continues to leak at motor/pressure switch release valve after motor stops.
REMEDY
Remove, clean or replace.
PROBABLE CAUSE
Defective pilot valve, the check valve is stuck open.
SYMPTOM
6. Air leaks from safety relief valve.
REMEDY
Operate safety relief valve manually by pulling on
ring. If it still leaks, it should be replaced.
Defective motor/pressure switch. Replace.
PROBABLE CAUSE
Possible defective safety relief valve.
Excessive air tank pressure.
SYMPTOM
SYMPTOM
5. Air continues to leak at motor/pressure switch release valve while motor is running.
REMEDY
Replace.
PROBABLE CAUSE
Defective motor/pressure switch.
SYMPTOM
7. Air leaks at pump.
PROBABLE CAUSE
Defective gaskets.
SYMPTOM
SYMPTOM
REMEDY
Replace and torque head bolts to 17 ft./lbs.
SYMPTOM
9. Air leak in air tank.
REMEDY
Air tank must be replaced. Do not attempt to repair
air tank!
PROBABLE CAUSE
Defective or rusted air tank.
REMEDY
Tighten fittings where air can be heard escaping.
Check fittings with soapy water solution. Do not
overtighten.
PROBABLE CAUSE
Fittings are not tight enough.
REMEDY
Contact Senco Customer Service @ 800-543-4596.
PROBABLE CAUSE
Damaged inlet (reed) valve.
10. Air blowing from inlet filter.
8. Air leaks at fittings.