30
REFRIGERATING CYCLE
TROUBLESHOOTING
CAUSE
STATE OF
THE SET
STATE OF THE
EVAPORATOR
TEMPERATURE
OF THE
COMPRESSOR
REMARKS
LE
A
K
A
G
E
PARTIAL
LEAKAGE
Appliance
don't get cold
normally.
Low flowing sound of
Refrigerant is heard and
frost forms in inlet only
A little high
more than
ambient
temperature.
• A little Refrigerant
discharges.
• Normal cooling is possible
when injecting Refrigerant
of regular amount.
WHOLE
LEAKAGE
Appliance
don't get cold
at all.
Flowing sound of Refrigerant
is not heard and frost isn't
formed.
Equal to ambient
temperature.
• No discharging of Refrigerant.
• Normal cooling is possible
when injecting Refrigerant
of regular amount.
C
LO
G
IN
C
A
P
IL
LA
R
Y
PARTIAL
CLOG
Appliance
don't get cold
normally.
Flowing sound of Refrigerant
is heard and frost forms
in inlet only.
A little high
more than
ambient
temperature.
• No discharging of
refrigerant.
• The capillary tube is faulty.
WHOLE
CLOG
Appliance
don't get cold.
Flowing sound of Refrigerant
is not heard and frost isn't
formed.
Equal to ambient
temperature.
• No discharging of
Refrigerant.
YES
YES
Does compressor run?
Does frost form in
the evaporator?
Does oil leak??
Observe the amount of
refrigerant discharged.
Normal amount
None or very little
Faulty
compressor
(Check the leakage point)
Check compressor
Clogged by dust.
Gas leakage.
Normal amount of
frost in evaporator.
No frost or forms
in inlet only
Inject refrigerant into compressor
and check the cooling operation.
Leakage Detection
Observe discharging point of refreigerant which may be in the oil discharging part in the compressor and the hole of the evaporator.
