Craftsman 921.16472 Manual Del Propietário página 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
Air leaking through
bleeder valve after
compressor shuts off
POSSIBLE CAUSE SOLUTION
Tank petcock is open Close petcock.
Check fittings with soapy water. Tighten or reseal leaking fittings. DO
Fittings Leak
NOT OVERTIGHTEN.
Restricted air intake Clean or replace intake filter element.
Prolonged excessive use of air Decrease amount of air used.
Check air requirement of accessory. If it is higher than CFM and
Compressor not large enough )ressure supplied by compressor, you need a larger compressor. Most
accessories are rated at a 25% duty cycle.
Hole in air hose Check and replace if necessary.
Tank leaks _, _ Immediately replace tank. DO NOT attempt to repair.
Blown seals Contact a Sears or other qualified service center.
Valve leaks Contact a Sears or other qualified service center.
Leaking or worn piston Contact a Sears or other qualified service center.
Dirty or damaged regulator Contact a Sears or other qualified service center.
internal parts.
This is normal If pressure drops too low, adjust regulator while accessory is used.
Check air requirement of accessory. If it is higher than CFM and
Compressor not large enough )ressure supplied by compressor, you need a larger compressor. Most
accessories are rated at a 25% duty cycle.
Tank pressure exceeded normal
Contact a Sears or other qualified service center.
operating pressure
Pressure switch stuck Contact a Sears or other qualified service center.
Tank pressure exceeds preset Motor wilt start automatically when tank pressure drops below kick-in
)ressure switch limit )ressure of pressure tank.
Motor overload protection has Let motor cool off and overload switch will automatically reset. This
tripped 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.
Fuse blown or circuit breaker • Check for proper fuse; "Fusetron" type T is acceptable.
tripped • Check for tow voltage and proper extension cord size.
• Disconnect other applications from circuit. Operate compressor on a
dedicated circuit.
Dirty or defective check valve. Replace or clean the check valve (see "To replace or clean check
valve" in the maintenance section).
Wrong wire gauge in cord or
Check for proper gauge and extension cord length.
excessive extension cord length
Loose electrical connections Contact a Sears or other qualified service center.
Paint spray on internal motor Contact a Sears or other qualified service center. Do not operate
)arts compressor in the paint spray area
Possible defective motor Contact a Sears or other qualified service center.
Dirty or defective check valve. Replace or clean the check valve (see "To replace or clean check
valve" in the maintenance section).
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