©
B
RE
A
T
H
E
S
A
FE
20
1
9
www.breathe-safe.com.au
Page
37
Issue date
:
Controlled document
:
Revision:
WA900-3EO
Solutions
Causes
Symptoms
System Cools
Intermittently
Clutch disengages
prematurely during
operation.
Suction gauge and
discharge gauge normal
Defective circuit breaker,
fan switch or motor.
Compressor clutch
slipping.
Improper ground, loose
connection in clutch coil.
Defective thermostat.
Faulty TX valve sensing
bulb.
Remove defective part for
service or replacement.
Check connections or
Replace clutch coil.
Adjust air gap. Replace
clutch if necessary
Replace thermostat.
Incorrect TX valve
superheat adjustment.
Replace bulb if necessary
Thermostat adjusted too
low.
Adjust or replace valve.
Adjust thermostat.
Diagnosis of electrical
thermostat required.
Excessive moisture in the
system.
Replace Receiver Drier.
Evacuate & charge system.
Suction gauge may be
excessively low or high.
Compressor operates until
discharge pressure builds
up, then clutch starts to
slip. Clutch may or may not
be noisy.
Evaporator ices up
intermittently.
System cools well in early
morning or late evening.
Will not cool during a hot
day.
Electrical components
operate intermittently.
Supply air restricted.
De-ice probe incorrectly
placed or malfunctioning.
FAULT DIAGNOSIS
