Trademark Tools AIR COMPRESSOR 2.5HP/20 GALLON - Manuel (Page 8)

TROUBLESHOOTING CHART
NOTE: Troubleshooting problems may have similar causes and solutions.
PROBLEM POSSIBLE CAUSE SOLUTION
Low pressure or
not enough air or
compressor does
not stop
Tank drain valve is open Close tank drain valve.
Fittings leak
Check fittings with soapy water. Tighten or reseal leaking
fittings. DO NOT OVERTIGHTEN.
Restricted air intake Clean or replace air filter element.
Prolonged or excessive use of
air
Decrease amount of air used.
Compressor not large
enough
Check air requirement of accessory. If it is higher than
CFM and pressure supplied by compressor, you need a
larger compressor. Most accessories are rated at 25% of
actual CFM while running continuously.
Hole in air hose Check and replace if necessary.
Tank leaks
WARNING：
Immediately replace tank. DO NOT attempt to repair.
Blown seals Replace compressor assembly.
Valve leaks Replace compressor assembly.
Leaking or worn piston Replace compressor assembly.
Air leaks from
regulator, or
regulator does not
regulate pressure
Dirty or damaged
regulator internal parts
Replace regulator or internal parts.
Regulated
pressure gauge
reading drops
when air
accessory is
being used
This is normal If pressure drops to low, adjust regulator while accessory is used.
Compressor not large
enough
Check air requirement of accessory. If it is higher than
CFM and pressure supplied by compressor, you need a
larger compressor. Most accessories are rated at 25% of
actual CFM while running continuously.
Pressure relief
valve opens
Tank pressure exceeded
normal rating pressure
Replace pressure switch.
Pressure switch stuck Replace pressure switch.
Motor will not run
Tank pressure exceeds
preset pressure switch
limit
Motor will start automatically when tank pressure drops
below tank cut-in pressure.
Motor thermal overload
protection has tripped
Turn the air compressor off, and wait until the motor has
cooled down. However wait at least 5 minutes to make
sure the thermal overload protector has recovered.
Fuse blown or circuit
breaker tripped
Replace blown fuse or reset circuit breaker. Do not use
fuse or circuit breaker with higher rating than specified for
you 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.
Check valve is stuck open Remove and clean or replace.
Wrong wire gauge in cord
or excessive extension
cord length
Check for proper gauge and extension cord length.
Loose electrical connections Contact authorized service center.
Paint spray on internal
motor parts
Have checked at service center. Do not operate
compressor in the paint spray area.
Possible defective motor Contact authorized service center.
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