Troubleshooting - Craftsman 921.165720 Owner's Manual

Risk of Unsafe Operation. Unit cycles automatically when
power is on. When servicing, you may be exposed to voltage sources, com-
pressed air, or moving parts. Before servicing unit unplug or disconnect elec-
trical supply to the air compressor, bleed tank of pressure, and allow the air
compressor to cool.
PROBLEM CAUSE CORRECTION
Low pressure or Tank drain valve is open Close drain valve
not enough air Fittings leak Check fittings with soapy water.
or Compressor Tighten or reseal leaking fittings.
does not stop DO NOT OVERTIGHTEN.
Restricted air intake Clean or replace intake filter element.
Decrease amount of air used.
Prolonged excessive
use of air
Compressor not
large enough
Hole in air hose
Tank leaks
Blown seals
Valve leaks
Leaking or worn piston Replace piston.
Air leaks from Dirty or damaged Replace regulator or internal parts.
regulator, or regulator internal parts.
regulator does
not regulate
pressure
Check air requirement of accessory.
If it is higher than CFM and
3ressure supplied by compressor,
/ou need a larger compressor.
Most accessories are rated at 25% of
actual CFM while running continuously.
Check and replace if necessary.
immediately replace
tank. DO NOT attempt to repair.
Replace seals.
Replace seals.
17- ENG