Troubleshooting Guide - Trane CGCL 200 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.
Symptom
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 voltameter.
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
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.
CGCL-SVX01B-E4
Maintenance
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
Dirty coil
Not enough airflow
Discharge pressure too high.
a) Voltage too low.
b) Cooling demand too high, or condensing
temperature too high.
Not enough refrigerant..
Water flow to evaporator too low.
Air filters dirty
Filter drier clogged.
Recommended action
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".
Clean coil
Increase fan speed
Change or adjust drive
See instructions for "discharge
pressure high".
a) Contact Power Supply Utility.
b) See instruction "discharge pressure too
high".
Repair leak. Add refrigerant.
Check water flow rate, and pressure
switch contact in water.
Clean or replace air filters
Replace filter drier.
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