11
11
TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSE
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 at maximum pressure
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
Compressor runs continuously
Defective pressure switch
Take compressor to service centre
Excessive air usage
Take compressor to service centre
Decrease air usage; compressor not large enough for
tool’s requirement
Piston rings are worn
Replace piston rings; air inlet filter is blocked, call customer
service for assistance
Air output lower than normal
Broken inlet valves
Take compressor to service centre
Connections leaking
Tighten connections
