16
RAU-SVX01B-E4
A) The compressor does not start up
Compressor terminals are live but
motor does not start
Contactor motor not operational.
No current ahead of motor contactor.
Current ahead of fuse, but not on
contactor side.
Low voltage reading on voltmeter.
Starter coil not excited.
Compressor does not run.
Compressor motor ”groans”.
High pressure switch tripped to
contacts open on high pressure.
Discharge pressure too high.
B) Compressor stops
High pressure switch tripped.
Over current thermal relay tripped.
Motor temperature thermostat tripped.
Anti-freeze security tripped.
C) Compressor stops just after its
start
Suction pressure too low.
Filter drier iced up.
Motor burned out.
Coil burned out or broken contacts.
a) Power cut.
b) Main power supply switched off.
Fuse blown.
Voltage too low.
Regulation circuit open.
Compressor sticking
(damaged or sticking components).
Discharge pressure too high
Discharge pressure too high.
a) Voltage too low.
b) Cooling demand too high, or
condensing temperature too high.
Not enough cooling fluid.
Filter drier clogged.
Replace compressor
Repair or replace.
Check fuses and connection.
See why system tripped.
If system is operational, switch on
main power supply.
Check motor insulation. Replace fuse.
Contact power Supply Utility.
Locate regulation device which has
tripped out and see why. See
instructions concerning this device.
Replace compressor.
See instructions for “discharge
pressure high”.
See instructions for “discharge
pressure high”.
a) Contact Power Supply Utility.
b) See instruction “discharge pressure
too high”.
Repair leak. Add refrigerant.
Replace filter drier.
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
Содержание RAU-SVX01B-E4
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