Troubleshooting - Porter-Cable PXCMF220VW Instruction 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
Low pressure or
not enough air
or Compressor
does not stop
Air leaks from
regulator, or
regulator does
not regulate
pressure
Regulated
pressure
gauge reading
drops when
air accessory
is being used
Pressure relief
valve opens

TROUBLESHOOTING

CAUSE
Tank drain valve is open Close drain valve
Fittings leak
Restricted air intake
Prolonged excessive
use of air
Compressor not
large enough
Hole in air hose
Tank leaks
Blown seals
Valve leaks
Leaking or worn piston
Dirty or damaged
regulator internal parts.
This is normal
Compressor not
large enough
Tank pressure
exceeded normal
operating pressure
Pressure switch stuck
Check fittings with soapy water.
Tighten or reseal leaking fittings.
DO NOT OVERTIGHTEN.
Clean or replace intake filter element.
Decrease amount of air used.
Check air requirement of accessory.
If it is higher than CFM and
pressure supplied by compressor,
you need a larger compressor.
Most accessories are rated at 25% of
actual CFM while running continuously.
Check and replace if necessary.
tank. DO NOT attempt to repair.
Replace seals.
Replace seals.
Replace piston.
Replace regulator or internal parts.
If pressure drops too low, adjust
regulator while accessory is used.
Check air requirement of accessory.
If it is higher than CFM and pressure
supplied by compressor, you need a
larger compressor. Most accessories
are rated at 25% of actual CFM
while running continuously.
Replace pressure switch
Replace pressure switch
16- ENG
CORRECTION
Immediately replace