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