Page 16
TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSE
SOLUTION
Compressor will not run
Loss of power or overheating
No electrical power
Blown shop/house fuse
Shop/house breaker open
Thermal overload is actuated
Pressure switch bad
Compressor has reached automatic shutoff
pressure
Check for proper use of extension cord
Check to be sure unit is plugged in
Check fuse/breaker
Replace shop/house blown fuse
Reset shop/house breaker, determining why
problem happened
See manual page 13
Take compressor to service center
Release air from tank until compressor re
-
starts automatically
Motor hums but cannot run or runs slowly
Low voltage
Wrong gauge wire or length of extension cord
Shorted or open motor winding
Defective check valve or unloader
Call an electrician
Check for proper gauge wire and cord length
Take compressor to service center
Take compressor to service center
Fuses blow/circuit breaker trips repeatedly
Incorrect size fuse, circuit overload
Wrong gauge wire or length of extension cord
Defective check valve or under loader
Check for proper fuse, use time-delay fuse,
disconnect other electrical appliances from
circuit or operate compressor on its own
branch circuit
Check for proper gauge wire and cord length
Take compressor to service center
Thermal overload protector cuts out
repeatedly
Low voltage
Lack of proper ventilation/room temperature
too high
Wrong gauge wire or length of extension cord
Call an electrician
Move compressor to well-ventilated area
Check for proper gauge wire and cord length
Air receiver pressure drops when compressor
shuts off
Loose connections
(fittings, tubing, etc.)
Loose drain valve
Check valve leaking
Check all connections with soap and water
solution and tighten
Tighten drain valve
Take compressor to service center
Excessive moisture in discharge air
Excessive water in air tank
High humidity
Drain tank
Move to area of less humidity; use air line filter
Compressor runs continuously
Defective pressure switch
Excessive air usage
Take compressor to service center
Decrease air usage; compressor not large
enough for tool’s requirement
Compressor vibrates
Loose mounting bolts
Tighten mounting bolts
Air output lower than normal
Broken inlet valves
Connections leaking
Take compressor to service center
Tighten connections
Summary of Contents for 671-049
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