17RAU-SVX01F-E4
Troubleshooting guide
These are simple diagnostic hints. If there is a breakdown, the Trane Service office should be contacted for
confirmation and assistance.
Problems symptoms Problem cause Action recommended
A) The compressor does not start up
Compressor terminals are live but motor does
not start
Motor burned out. Replace compressor
Contactor motor not operational. Coil burned out or broken contacts. Repair or replace.
No current ahead of motor contactor. a) Power cut.
b) Main power supply switched off.
Check fuses and connection.
See why system tripped.
If system is operational, switch on main
power supply.
Current ahead of fuse, but not on contactor
side.
Fuse blown. Check motor insulation. Replace fuse.
Low voltage reading on voltmeter. Voltage too low. Contact power Supply Utility.
Starter coil not excited. Regulation circuit open. Locate regulation device which has tripped
out and see why. See instructions concerning
this device.
Replace compressor.
Compressor does not run.
Compressor motor ”groans”.
High pressure switch tripped to contacts open
on high pressure.
Discharge pressure too high.
Compressor sticking
(damaged or sticking components).
Discharge pressure too high
See instructions for “discharge pressure
high”.
B) Compressor stops
High pressure switch tripped.
Over current thermal relay tripped. Discharge pressure too high. See instructions for “discharge pressure
high”.
a) Voltage too low.
b) Cooling demand too high, or condensing
temperature too high.
a) Contact Power Supply Utility.
b) See instruction “discharge pressure too
high”.
Motor temperature thermostat tripped.
Anti-freeze security tripped.
Not enough cooling fluid. Repair leak. Add refrigerant.
C) Compressor stops just after its start
Suction pressure too low.
Filter drier iced up.
Filter drier clogged. Replace filter drier.
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