Craftsman 919.166442 - Manual (Page 19)

19 - ENG A13640
TROUBLESHOOTING
Risk of Unsafe Operation. Unit cycles automatically when
power is on. When servicing, you may be exposed to
voltage sources, compressed air, or moving parts. Before servicing unit
unplug or disconnect electrical supply to the air compressor, bleed tank of
pressure, and allow the air compressor to cool.
PROBLEM CAUSE CORRECTION
Pressure switch does
not shut off motor when
compressor reaches "cut-
out" pressure.
Pressure switch "cut-out"
too high.
Move On/Auto/Off lever to
the "Off" position, if the
outfit does not shut off
contact a Trained Service
Technician.
Contact a Trained Service
Technician.
Excessive tank
pressure - safety
valve pops off.
Tube fittings are not tight
enough. Tighten fittings where air
can be heard escaping.
Check fittings with soapy
water solution. Do Not
Overtighten. Air leaks at
fittings.
Air leaks in air
tank or at air
tank welds. Defective air tank. Air tank must be replaced.
Do not repair the leak.
Risk of
Bursting
Do not drill into, weld or
otherwise modify air tank
or it will weaken. The tank
can rupture or explode.
Air leaks
between head
and valve plate. Leaking seal. Contact a Trained Service
Technician.
Possible defect in safety
valve. Operate safety valve
manually by pulling on ring.
If valve still leaks, it should
be replaced. Air leak from
safety valve.
Possible defect in safety
valve. Operate safety valve
manually by pulling on ring.
If valve still leaks, it should
be replaced. Knocking Noise.