17 - ENG N014212
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
Excessive tank pressure
- safety valve pops off. Pressure switch does
not shut off motor when
compressor reaches
"cut-out" pressure.
Move On/Off lever to
the "Off" position, if
the outfit does not shut
off contact a Trained
Service Technician.
Pressure switch "cut-
out" too high. Contact a Trained
Service Technician.
Air leaks at fittings. 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 in air tank or at
air tank welds. Defective air tank. Air tank must be
replaced. Do not repair
the leak.
Risk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.
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. Possible defect in safety
valve. Operate safety valve
manually by pulling on
ring. If valve still leaks, it
should be replaced.