Page 19
VII. FAILURE DIAGNOSIS
1. Not cold at all (freezing storage and cooling chamber are not cold)
Is the plug being
inserted?
Insert the power plug.
No
Is the plug being
inserted?
Any shutdown? Check the abnormal
power cord or switch
No
Is the voltage over
99V?
Is a special socket used by the
refrigerator?
No
Is a socket affected by other electrical wiring?
No
Yes
Yes
Is the geographical environment being
using a special one?
Yes
Is the compressor
operating?
Short the F thermostat and see if the
compressor is operating.
Yes
No
Change F-THM, then check is it due to the freon leakage of thermo
sensor or by poor contacting point?
Operating
When regulat e D meter to cooling
operation side, is the compressor
operation?
Is the temperature fuse
melted?
Replace the temperature fuse
Operating
Not operated
No
Is temperature switch
engaged?
Replace the temperature
switch
No
Engaged
Replace D meter.
Engaged
Non-operating
* Turn D time to right side
till heating two noises
Short the overload protector and see if
the compressor is operation.
Operating
Replace the overload
protector.
Is the relay of PTC starter normal?
Replace the relay of PTC
starter.
Abnormal
Yes
Non-operating
Is the capacitor normal at starting or
operating?
Replace the capacitor.
Abnormal
*Impedance short (0
Ω
) and poor circuit (0
∞
)
*In case of the normal item, the needle of the
panel will become (
∞Ω
) after one vibration.
Yes
The contacting point being poor?
Repair the contacting point.
Yes
* Remove the pin from the connecting point and
check if it has turned into black.
No
Is the circuit of compressor coil
normal?
Replace the compressor and
drying filter.
Abnormal
* Check the circuit of mail coil, auxiliary coil
and resistance value.
Inspection of the frosted cooler
Poorly
defrosted
Refer to the mothod of non-
defrost
Ice beads or serious frost formed
in the cooler chamer
Inspection of freon leakage
Freon leakage
Poor location be repaired.
Replace the compressorm
drying filter. Clean the freon
circuits.
No freon leakage
Check the leakage
location
* When the inner side of compressor is too dirty,
it must be replaced.
Defective freon circuit
Clogged by impurities
Replace the clogged parts.
Replace the drying filter.
Clean the freon circuit
Non defrost
Freon circuit
clogged
Poor compression of
the compressor
Replace the compressor,
drying filter. Clean the freon
circuit.
The lower pressure tube of
compressor fails to such the air.
Yes
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