21
SERVICE MANUAL
Model:AFD631GW/GB/GR
21
Issue 201003
Rev. Ref11003S006V0
(4) Conditions for judging LOCK of the freezer fan: If the rotation speed of the fan is less than
300RPM or the fan does not run and the state has persisted for over 30 seconds, a freezer fan
malfunction will be displayed. Normal display will be recovered after it becomes normal.
Otherwise the freezer fan malfunction will persist.
5-3.
Defrosting Control Principle
(1) A defrosting cycle will be started once the compressor has operated for 8 hours accumulatively. It
will stop defrosting when the defrosting sensor detects a temperature over 10ºC.
(2) The compressor stops and the refrigeration air door is closed during defrosting.
(3) After initial powering on or resetting of the control panel, it will start the first defrosting cycle after
the compressor has operated for 6 hours accumulatively.
(4) It may enter the defrosting state when the defrosting sensor is malfunctiony (short-circuit or
open-circuit). In this case, it will exit the defrosting state after 30 minutes.
Chapter 6 System flow principle
6-1. Refrigeration flow chart
Principle diagram and description of the refrigeration cycle
The refrigerant is compressed in the compressor, from there, it enters the dry filter, de-dewing tube,
and the condenser, and goes into the evaporator after being throttled and decompressed in the
capillary tube. Finally, it returns to the compressor through the air return tube.
Principle diagram of the refrigeration cycle:
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