TROUBLESHOOTING
Symptom 1. Motor will not run or restart.
Power cord not plugged in.
Motor/Pressure switch in "OFF" position.
Motor thermal overload switch has tripped.
Fuse blown or circuit breaker has tripped.
Wrong gauge wire or length of extension cord.
Air tank pressure exceeds motor/ pressure switch
Pressure release valve on motor/ pressure switch has not unloaded pump head pressure.
Plug cord into grounded outlet.
Move switch to "ON" position.
Turn air compressor off, wait until motor is cool, then check motor circuit breaker.
Replace fuse or reset circuit breaker.
Check for proper fuse amperage.
Check for low voltage conditions.
Disconnect any other electrical appliances from circuit or operate air compressor on its own branch circuit.
Check chart on page #10 for proper gauge wire and cord length.
Motor will start automatically when air tank pressure drops below
Bleed the line by moving the switch to the "OFF" position.
Defective motor, motor capacitor, motor/ | Contact Senco Customer Service. |
pressure switch, or check valve. |
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Symptom 2. When in the "ON" position, 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 smaller tool or a larger air compressor.
Symptom 3. 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. |
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