This section provides a list of the more frequently encountered malfunctions, their causes and corrective actions. The operator or maintenance
personnel can perform some corrective actions, and others may require the assistance of a qualified D
Problem
Excessive air tank pressure-safety valve pops off ......................................................................1, 2
Air leaks .................................................................................................................................... 3
Air leaks in air tank or at air tank welds .................................................................................... 4
Air leaks between head and valve plate .................................................................................... 5
Air leaks from safety valve ......................................................................................................... 6
Knocking Noise .......................................................................................................................... 11
Pressure reading on the regulated pressure gauge drops when an accessory is used ........... 7
Compressor is not supplying enough air to operate accessories.............................................. 8, 9, 10, 11, 12, 21, 23
Regulator knob has continuous air leak .................................................................................... 13
Regulator will not shut off air outlet ........................................................................................... 13
Motor will not run ....................................................................................................................... 11, 14, 15, 16, 17, 18, 19, 20, 24
Motor shuts off when operating in constant run mode .............................................................. 22, 25
Continuous air leak at pressure relief tube. ............................................................................... 26, 27
CoDe
PossIble CAuse
1
Pressure switch does not shut off motor when com-
pressor reaches cut-out pressure
Pilot valve does not release pressure when air tank
reaches blow-off pressure
2
Pressure switch cut-out too high
3
Tube fittings are not tight enough
Troubleshooting Guide
Troubleshooting Codes
PossIble solutIon
Set the Auto/Off switch to OFF(O), if the unit does not shut off
contact a D
service center.
Pilot valve must be replaced.
Contact a D
rized service center.
Tighten fittings where air can be heard escaping. Check fittings
with soapy water solution. Do not overtighten.
18
WALT technician or your dealer.
e
Code
WALT factory service center or a D
e
WALT factory service center or a D
e
WALT authorized
e
WALT autho-
e