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Problems Reasons Removing methods
Compressor
can not be
started
1. Fuse is broken
2. The contact of plug, socket, and cable
is not good. Cable broken.
3. The voltage is too low, 10-15% less
than rated voltage
4. The knob of temperature controller is at
“rest” position.
5. The temperature controller is out of
order.
6. Starting relay or thermal protection unit
is out of order or broken.
7. Wire broken of motor starting coil or
operation coil.
8. The compressor motor is burned or
rotator and stator are blocked to dead.
9. There is leakage of high-pressure gas
valve or the shaft is embraced to dead.
1. Check if there is short circuit and
solve it, if not, change capable fuse
2. Check and connect tightly, or
change.
3. Use till voltage rises to rated
value or attach a stabilizer.
4. Rotate the knob to wanted
position for suitable temperature.
5. Change the controller.
6. Change starting relay or thermal
protection unit.
7. Measure using R×1 position of
avometer, if there is wire broken,
change compressor.
8. Change compressor.
9. Change compressor.
Compressor
starts too
frequent,
operation
time too long,
but
temperature
drop in
freezer is too
slow
1. The distance between temperatures
sensing tube of temp. Controller and
evaporator are too big.
2. The temperature controller is out of
order.
3. Food stuffs in the freezer too much,
door opens too frequent and open time
too long.
4. The environment temperature is too
high, humidity too high, airflow is
impeded.
5. The frost layer at the evaporator is too
thick.
6. The refrigerant is insufficient or
leakage.
7. Compressor efficiency is reduced.
8. The drying filter is blocked.
1 Adjust and make it close to
evaporator cover.
2.Change the temperature
controller.
3.Reduce them.
4.Put the freezer to suitable place
and make air circulate well.
5.Remove frost regularly.
6.Check or supplement refrigerant.
7.Change compressor.
8.Change new drying filter.
Compressor
runs without
stop,
temperature
in freezer is
too low
1.The knob of temperature controller has
been set to “over cooling” position.
2.The contacting point of temperature
controller is adhered.
3.The temperature sensing probe of
controller is not placed well, and causes
maladjustment
4.Compressor efficiency reduced.
1. Change the position to
moderate.
2. Repair or change.
3. Adjust to suitable position,
normally contact tightly with
evaporator cover.
4.Change compressor.
Compressor
buzzes and
cannot be
started,
thermal
protection
unit jump
1. Voltage is too low.
2. Starting relay out of order.
3. The starting coil of starting motor is
broken.
4. Compressor does not run.
1. Supplement a stabilizer, adjust
to rated value.
2. Change starting relay.
3. Change compressor.
4.The shaft and piston in the
compressor is blocked, please
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