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8
trOUBLesHOOtiNg
PrOBLem
cAUse
POssiBLe sOLUtiON
Compressor will not run
Loss of power or overheating
Check for proper use of extension cord
No electrical power
Check to be sure unit is plugged in
Check fuse/breaker
Blown shop/house fuse
Replace shop/house blown fuse
Shop/house breaker open
Reset shop/house breaker, determining
why problem happened
Current limiting protector open
Reset motor overload to restart after motor
has cooled.
Bad pressure switch
Replace pressure switch
Tank is full of air
Compressor will turn on when tank
pressure drops to cut-in pressure
Motor hums but cannot run or
runs slowly
Low voltage
Check with voltmeter
Wrong gauge wire or length of
extension cord
Check for proper gauge wire and cord
length
Shorted or open motor winding
Take compressor to service centre
Defective check valve or unloader
Take compressor to service centre
Current limiting protector cuts
out repeatedly
Low voltage
Check with voltmeter
Lack of proper ventilation/room
temperature too high
Move compressor to well-ventilated area
Wrong gauge wire or length of
extension cord
Check for proper gauge wire and cord
length
Air tank pressure drops when
compressor shuts off
Loose connections (fittings, tubing,
etc.)
Check all connections with soap and water
solution and tighten
Loose drain valve
Tighten drain valve
Check valve leaking
Take compressor to service centre
DANger
Do not disassemble check valve, tank drain
valve or pressure relief valve with air in
tank — bleed tank.
Excessive moisture in
discharge air
Excessive water in air tank
Drain tank
High humidity
Move to area of less humidity; use air line
filter
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