bad thermal protection unit is normally caused by burn contact points or a bad heating wire.
⑤The motor winding are burned.
⑥The compressor shaft is broken and blocking the cylinder.
12.2.2 Operation of freezer is not normal
Freezer starts when power is switched on, but after a few seconds or
Continuity and can not work normally; there are several reasons for this matter:
(1) Big fluctuation of voltage
The voltage required for proper operation is 220V olts. If the voltage is too high, the current flowing through the starter will increase accordingly. When it exceeds the permissible value, the starting contact point will keep in connection state for a long time and cannot be released in time (at normal situation, the motor starting coil will cut off in about 1s after starting). This will make the coil temperature rising rapidly, and then the thermal protection unit cuts off the circuit and stop operation. When power is cut off, the temperature of thermal protection unit reduces quickly and will switch power on when reaching the reset temperature. At this time, if the contact point has not been released, the starting contact point could not contact tightly and it is in false connection. This will make the compressor tremble; thermal protection unit will open after a short time.
(2) Operating amperage too high
Freezer operation current is too big and will not operate normally. There are two reasons way:
MAINTENANCE SERVICE AND TROUBLE SHOOTING
Maintenance Service and Trouble Shooting
First, the freezer stops automatically after a few seconds after starting,
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