mabe RMB32YLCS0, Service Manual

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17
17
Chapter 6 Main Function Operating principle
6-1 Defrost system
6-1-1 defrost control
：
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 8
℃
,the defrost stops, in defrosting the compressor and freezer fan are off, the refrigeration
damper closes.
If the defrost time reaches 90 minutes, but the temperature of the defrost sensor does not reach 8
℃
,
then the defrost heater is off, Ed displays.
6-1-2. the easily broken part in the defrost system
：
1
）
Defrost fuse, it is on the middle of the evaporator, outer is plastic bushing, normally, it is conducting.
If it is open, it is broken.
2 ） The connection between the defrost fuse or defrost heater and cabinet, if the connection terminal
falls off or decline, poor contact will happen.
3
）
Defrost sensor, which locates at the top
6-1-3. defrost rule
Ambient temperature Comp ON Time Condition
AT
＜
14
℃
Comp ON Time
＜
7h Comp continue on 2 cycle R
≥
OFF
7 ≤ Comp ON Time ＜ 12h
R-Door ON ≥ 180s
Comp ON Time ≥ 3h
Comp ON
⇒
OFF R-SNR
＞
R-Set OFF
Comp ON Time ≥ 12h
R-Door ON ≥ 60s
Comp ON Time
≥
3h
R-Damper ON
≥
60min
S-Damper ON ≥ 120min(S-Set ＞ -15 ℃ )
F-SNR> F-Set ON+7
℃
Comp ON
⇒
OFF R-SNR
＞
R-Set OFF
Comp ON Time =50h Comp ON Time =50h then defrost
14
≤
AT
＜
35
Comp ON Time
＜
7h Comp continue on 2 cycle R
≥
OFF
7
≤
Comp ON Time
＜
12h
R-Door ON ≥ 180s
Comp ON Time
≥
3h
Comp ON
⇒
OFF R-SNR
＞
R-Set OFF
Comp ON Time ≥ 12h
R-Door ON ≥ 60s
Comp ON Time
≥
3h
R-Damper ON
≥
90min
S-Damper ON ≥ 120min(S-Set ＞ -15 ℃ )
F-SNR> F-Set ON +7
℃
Comp ON
⇒
OFF R-SNR
＞
R-Set OFF
Comp On Time =50h Comp ON Time =50h then defrost
35 ≤ AT ＜ 40
Comp ON Time
＜
7h Comp continue on 2 cycle R
≥
OFF
7 ≤ Comp On Time ＜ 12h
R-Door ON ≥ 180s
Comp ON Time
≥
3h