Haier AFL631 series Service Manual

Also see for AFL631 series: Service manual

Haier AFL631 series Service Manual Manual pdf 23 page image

SERVICE MANUALModel: AFL631 & CFE63323Issue 200905Rev. Ref0905S003V0Chapter 5 Control principle of electronic component5-1. Air Escaper(1) The refrigeration air door is controlled with the fridge storage temperature sensor R SNR.(2) The air door is closed from the beginning of defrosting until 15 minutes after the defrosting isfinished.(3) Upon initial powering on or resetting of the control panel, the air door conducts aclose-and-open cycle before acting according to the control conditions in item (1).(4) The air door will be forced to conduct an open-and-close cycle if it has been closed for 1hour. After that, its closing/opening will be controlled by R SNR.(5) If the temperature is still rising (or dropping) within 10 minutes after opening (or closing) ofthe air door, it will open (or close) once again.5-2. Control Principle of the FanThe freezer fan is controlled by the control panel according to the following conditions. The DCfan’s rotation speed is regulated with PWM mode and the AC fan operates directly.(1) ON/OFF condition of the freezer fan (The control mode of the DC fan is listed in the table below.The AC fan runs under condition ON and stops running under condition OFF):(2) When the fridge storage compartment door is opened, the freezer fan will run and the refrigerationair door will open. After 2 minutes, the refrigeration air door will close;(3) When the freezer storage compartment door is open, the freezer fan will not run;(4) Conditions for judging LOCK of the freezer fan: If the rotation speed of the fan is less than300RPM or the fan does not run and the state has persisted for over 30 seconds, a freezer fanmalfunction will be displayed. Normal display will be recovered after it becomes normal.Otherwise the freezer fan malfunction will persist.5-2. Defrosting Control Principle(1) A defrosting cycle will be started once the compressor has operated for 8 hours accumulatively. Itwill 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 afterthe compressor has operated for 6 hours accumulatively.(4) It may enter the defrosting state when the defrosting sensor is malfunctiony (short-circuit oropen-circuit). In this case, it will exit the defrosting state after 30 minutes.