TJM Vehicle Mount Compressor Installation and User Manual
For product warranty please refer to our website www.tjm.com.au
File: F-17800.docx
Page 12 of 12
29/05/2019
7.3
Troubleshooting Guide
Problem
Possible Cause
Resolution
Compressor does not run
Thermal cut-off
switch active
Switch off power, wait 45 minutes for
compressor to cool, restart.
Wiring Fault
Check that wiring has been connected
according to diagram. Check power
switch illuminates green with dash lights
and red when switched on.
Fuse blown
Replace 40 A Maxi blade fuse.
Relay blown
Test with another relay and replace if
required
Faulty pressure
switch
Check for voltage at relay terminal 86.
Replace switch if required.
Compressor switches on and off
frequently
Air leakage
Check all air lines and fittings for leaks.
Compressor does not switch off at
120 PSI (observe relief valve opens
while running)
Faulty pressure
switch
Replace pressure switch.
Compressor air flow lower than normal Blocked air filter
Inspect air filter and replace if dirty.
Unusual noise or vibration
Worn isolators
Replace isolators.
Loose mounts
Tighten all mount bolts.
This is a basic guide for field troubleshooting only. If the compressor does not operate after taking these
steps, refer to a TJM distributor.
