Chapter 6 Main Function Operating Principle; Defrost System - Haier HSM518HMNSS0 Manual De Servicio

SERVICE MANUAL
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Model: HSM518HMNSS0

Chapter 6 Main Function Operating principle

6-1 Defrost system

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6-1-1 defrost control ：
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According to the times of opening and closing the door and the time of the compressor cumulative
working, the refrigerator has different frost timing . When the temperature of the defrost sensor reaches
7℃,the defrost stops, in defrosting the compressor and freezer fan are off, the refrigeration damper
closes.
If the defrost time reaches
then the defrost heater is off, Ed displays.
6-1-2. the easily broken part in the defrost system ：
Defrost fuse, it is on the middle of the evaporator, outer is plastic bushing, normally, it is conducting.
1）
If it is open, it is broken.
The connection between the defrost fuse or defrost heater and cabinet, if the connection terminal
2）
falls off or decline, poor contact will happen.
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Defrost sensor, which locates at the top right
3）
6-1-3. defrost rule
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RT（℃）
Compressor accumulative
running time：7H＜T≤12H
Compressor accumulative
RT＜23
running time：T＞12H
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Refrigerator accumulative
running time =50H
Compressor accumulative
running time：7H＜T≤12H
Compressor accumulative
23≤RT≤28
running time：T＞12H
Refrigerator accumulative
running time =72H
Compressor accumulative
28＜RT＜
running time：7H＜T≤12H
35
70 minutes, but the temperature of the defrost sensor does not reach 7℃,
Time
R.door open accumulative time ≥9min ，Defrost
R.door open accumulative time ≥3min ，Defrost
R.door open accumulative time ≥9min ，Defrost
R.door open accumulative time ≥3min ，Defrost
R.door open accumulative time ≥9min ，Defrost
Defrost condition
Defrost Immediately
Defrost Immediately
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Issue 20200930
REF. Ref1505S017V0
Immediately
Immediately；
Immediately
Immediately；
Immediately