17
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
Compressor will not run Switch is in OFF position
No electrical power at wall outlet
Blown shop/house fuse
Shop/house breaker open
Motor overheated, overlolad protector
open
Pressure switch bad
Compressor has reached automatic
shutoff pressure
Make sure compressor is plugged in and
switch is in the AUTO position.
Check circuit breaker or fuse at electri-
cal panel
Replace shop/house fuse
Reset shop/house breaker, determining
why problem happened
Allow compressor to cool for 30 min-
utes, then reset
Take compressor to service center
Release air from tank until compressor
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 appli-
ances from circuit or operate compres-
sor on its own branch circuit
Check for proper gauge wire and cord
length
Take compressor to service center
Push Button Overload protector cuts
out repeatedly
Low voltage
Lack of proper ventilation/room tempera-
ture too high
Wrong gauge wire or length of extension
cord
Clogged air filter
Call an electrician
Move compressor to well-ventilated
area
Check for proper gauge wire and cord
length
Clean air filter
Air receiver pressure drops when com-
pressor 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
Any problem or any other servicing not listed above should be performed by an authorized service representative.
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