Craftsman 921.16472 Owner's Manual page 9

Note: Troubleshooting problems may have similar causes and solutions.
PROBLEM
Low pressure or not
enough air
or
Compressor does not
stop
Air leaks from regulator,
or regulator does not
regulate pressure
Regulated pressure
gauge reading drops
when air accessory is
being used
Pressure relief valve
opens
Motor will not run
POSSIBLE CAUSE
Tank petcock is open
Fittings Leak
Restricted air intake
Prolonged excessive use of air
Compressor not large enough
Hole in air hose
Tank leaks
Blown seals
Valve leaks
Leaking or worn piston
Dirty or damaged regulator
internal parts.
This is normal
Compressor not large enough
Tank pressure exceeded normal
operating pressure
Pressure switch stuck
Tank pressure exceeds preset
3ressure switch limit
Motor overload protection has
tripped
Fuse blown or circuit breaker
tripped
Dirty or defective check valve.
Wrong wire gauge in cord or
excessive extension cord length
Loose electrical connections
Paint spray on internal motor
_arts
Possible defective motor
Dirty or defective check valve.
SOLUTION
Close petcock.
Check fittings with soapy water. Tighten or reseal leaking fittings. DO
NOT OVERTIGHTEN.
Clean or replace intake filter element.
Decrease amount of air used.
Check air requirement d accessory. If it is higher than CFM and
_ressure supplied by compressor, you need a larger compressor. Most
accessories are rated at a 25% duty cycle.
Check and replace if necessary.
_k _ Immediately replace tank. DO NOT attempt to repair.
Contact a Sears or other qualified service center.
Contact a Sears or other qualified service center.
Contact a Sears or other qualified service center.
Contact a Sears or other qualified service center.
If pressure drops too low, adjust regulator while accessory is used.
Check air requirement d accessory. If it is higher than CFM and
_ressure supplied by compressor, you need a larger compressor. Most
accessories are rated at a 25% duty cycle.
Contact a Sears or other qualified service center.
Contact a Sears or other qualified service center.
Motor wilt start automatically when tank pressure drops below kick-in
_ressure of pressure tank.
Let motor cool off and overload switch will automatically reset. This
may take several minutes.
• Replace blown fuse or reset circuit breaker. Do not use fuse or circuit
breaker with higher rating than specified for your branch circuit.
• Check for proper fuse; "Fusetron" type T is acceptable.
• Check for low voltage and proper extension cord size.
• Disconnect other applications from circuit. Operate compressor on a
dedicated circuit.
Replace or clean the check valve (see "To replace or clean check
valve" in the maintenance section).
Check for proper gauge and extension cord length.
Air leaking through
bleeder valve after
compressor shuts off
Contact a Sears or other qualified service center.
Contact a Sears or other qualified service center. Do not operate
compressor in the paint spray area
Contact a Sears or other qualified service center.
Replace or clean the check valve (see "To replace or clean check
valve" in the maintenance section).
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