Haier HB21FWRSS Service Manual - Contents

SAFETY PRECAUTIONS----------------------------------------------------------------1-2 

SPECIFICATIONS--------------------------------------------------------------------------3-4 

PARTS IDENTIFICATIONS--------------------------------------------------------------5 

DISASSEMBLY------------------------------------------------------------------------------6-12 

CONTROL AND DISPLAY SYSTEM--------------------------------------------------13-18 

Control and Display Panel---------------------------------------------------------13 

Function Adjustment and Control Principle------------------------------------14-18 

REFRIGERATION PRINCIPLE----------------------------------------------------------19 

     System Flow Chart-------------------------------------------------------------------19 

System Flow Scenograph ---------------------------------------------------------19 

CIRCUIT DIAGRAM ------------------------------------------------------------------------20 

Brief Principle Diagram-------------------------------------------------------------20 

Connect Diagram---------------------------------------------------------------------20 

SENSOR AND MALFUNCTION CODE------------------------------------------------21 

Introduce of Sensor Parts----------------------------------------------------------22 

Malfunction Codes Problems------------------------------------------------------22 

ELECTRICAL CONTROL PRINCIPLE-------------------------------------------------23 

Overview--------------------------------------------------------------------------------23 

Main Control Board of HB21T-----------------------------------------------------23 

Air Escaper Controlling Pinciple--------------------------------------------------25 

Ice Maker Control Principle--------------------------------------------------------25 

Refrigerator Test Model-------------------------------------------------------------26 

Fan motor Control---------------------------------------------------------------------27 

Defrosting Control--------------------------------------------------------------------28 

TROUBLE SHOOTING--------------------------------------------------------------------30-43 

Normal Phenomena-not troubles for refrigerators---------------------------30 

Troubles in Refrigerators and Their Remedies------------------------------30-32 

Analysis of Troubles and Troubleshooting------------------------------------33-44 

CONTENTS

Water Way Operation Instruction------------------------------------------------45-46