Troubleshooting Guide - Trane CGWH 115 Installation Operation & Maintenance

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
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.
CGWH-SVX01D-E4
Problem cause
Motor burned out.
Coil burned out or broken contacts.
a) Power cut.
b) Main power supply switched off.
Fuse blown.
Voltage too low.
Control 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.
Water flow to evaporator too low.
Filter drier clogged.
Action recommended
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.
c) See instruction "discharge pressure too
high".
Repair leak. Add refrigerant.
Check water flow rate, and pressure switch
contact in water.
Replace filter drier.
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