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Symptom 1. Motor will not run or restart.
Power cord not plugged in.
Motor/Pressure switch in "OFF" position.
Fuse blown or circuit breaker has tripped.
Wrong gauge wire or length of extension
cord.
Air tank pressure exceeds motor/
pressure switch "cut-in" pressure.
Defective motor, motor capacitor,
motor/pressure switch, or check valve.
Symptom 2. When in the "ON" position, motor runs continuously.
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 3. Air continues to leak at motor/pressure switch release valve after motor stops.
PROBABLE CAUSE
The check valve is stuck open.
Symptom 4. Air continues to leak at motor/pressure switch release valve after motor is running.
PROBABLE CAUSE
Defective motor/pressure switch.
TROUBLESHOOTING
Plug cord into grounded outlet.
Move switch to "ON" position.
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 "cut-in" pressure of motor/pressure switch.
Contact Senco Customer Service.
REMEDY
Move the motor/pressure switch to the "Off" position.
If the motor doesn't shutoff, 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.
REMEDY
Remove, clean or replace.
REMEDY
Replace
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