Troubleshooting Guide - Snap-On 870765C Mode D'emploi

6. Pull and release the ring a few times to ensure that the plunger moves in and
out. Replace the safety relief valve if plunger does not move or is difficult to
move.
CHECKING AIR FILTER ELEMENT:
1. The air compressor must be turned OFF.
2. Disconnect compressor from the power source.
3. Open tank drain to bleed off all air pressure before attempting any maintenance
or repair.
4. Allow compressor to fully cool before attempting any maintenance or repair.
5. Remove the face of the filter body to access the filter element by pushing and
rotating the front portion of the filter body in a counter clockwise direction to
release the locking tabs.
6. Use compressed air to blow loose dirt and debris from the paper filter element.
Replace filter element if it cannot be cleaned sufficiently.
7. Reinsert filter element into filter body and reinstall filter faceplate.
MOISTURE IN COMPRESSED AIR
Moisture is a normal by-product of compressing air. As the moisture builds during
compressor use, it can be carried though the air hose. When using paint spray gun
or sandblasting gun, the use of a special filter to remove moisture from the air line
is highly recommended. Moisture in the compressed air will cause water spots in
paint jobs and cause blasting media to clog the sandblasting gun.
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TROUBLESHOOTING GUIDE

THE COMPRESSOR DOES NOT START OR RESTART:
PROBABLE CAUSE:
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
"cut-in" pressure.
Pressure release valve on
motor/pressure switch has
not unloaded pump head
pressure.
Defective motor, motor
capacitor, motor/pressure
switch.
THE COMPRESSOR MOTOR STALLS:
PROBABLE CAUSE:
Overloaded motor.
Improper lubrication.
Low oil level.
Defective check valve.
SOLUTION:
Plug cord into grounded outlet.
Move switch to AUTO position.
Turn air compressor off, wait until the
motor is cool, then press motor thermal
overload (black) button firmly until click is
heard.
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 in instruction manual for proper gauge
wire and cord length.
Motor will start automatically when air tank
pressure drops below "cut-in" pressure of
motor/pressure switch.
Bleed the line by moving the switch to the OFF
position.
Contact Consumer Helpline at 1-866-984-7627.
SOLUTION:
Have a certified technician check the unit.
See LUBRICATION section in instruction
manual.
Check oil level and fill if necessary.
Replace check valve. Contact Consumer
Service at 1-866-984-7627.
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