CGWH-SVX01D-E4
26
Problems symptoms
Problem cause
Action recommended
D) The compressor keeps running without
stopping
Temperature too high in areas requiring air-
conditioning.
Excess load on cooling system.
Check thermal insulation and air-tightness
of areas requiring air-conditioning.
Chilled water temperature output too high.
Existing cooling demand on system.
Check thermal insulation and air-tightness
of areas requiring air-conditioning.
E) Loss of oil in compressor
Oil level too low in indicator.
Not enough oil.
Contact Trane Office before to order oil
Gradual fall in oil level.
Filter drier clogged.
Replace filter drier.
Suction line too cold.
Liquid flows back to compressor.
Adjust superheat and check bulb fixing of
the expansion valve.
F) Compressor noisy
Compressor knocks.
Components broken in compressor.
Change compressor.
Suction line abnormally cold.
a) Uneven liquid flow.
b) Expansion valve locked in open position.
a) Check superheat setting and fixing of
expansion valve bulb.
b) Repair or replace.
G) Insufficient cooling capacity
Thermostatic expansion valve ”whistles”.
Not enough refrigerant.
Check refrigerant circuit tightness and add
refrigerant.
Excess pressure drops through filter drier.
Drier filter clogged.
Replace.
Excessive superheat.
Superheat not properly adjusted.
Check adjustment of superheat and adjust
thermostatic expansion valve.
Insufficient water flow.
Chilled water pipes obstructed.
Clean pipes and strainer.
H) Discharge pressure too high
Condenser abnormally hot.
Presence of uncondensable liquids in system, or
excess refrigerant.
Purge uncondensable fluids and drain off
excess refrigerant.
Chilled water leaving temperature too high.
Overload on cooling system.
Reduce load on system.
Reduce water flow if necessary.
Condenser air output too hot.
Reduced air flow. Air intake temperature higher
than specified for unit.
Clean battery.
Check operation of motor fans.
