Table of Contents
Contents
1.Introduction-------------------------------------------------------------------------------------------------------------------1
2.List of fuctions---------------------------------------------------------------------------------------------------------------6
3.Specifications ----------------------------------------------------------------------------------------------------------------7
4.Printed Circuit Board Connector Wiring Diagram -----------------------------------------------------------------9
5.Funcitions and Control---------------------------------------------------------------------------------------------------14
5.1 Main functions and control specification of indoor unit - --------------------------------------------------------14
5.2
Value of termistor -------------------
5.3
6. Service Diagnosis -----------------------------------------------------------------------------------------------------------41
6.1 Caution for Diagnosis-------------------------------------------------------------------------------------------------------41
6.2 Problem Symptoms and Measures-------------------------------------------------------------------------------------41
6.3 Error Codes and Description indoor display--------------------------------------------------------------------------42
6.3.1 Thermistor or Related Abnormality-----------------------------------------------------------------------------------43
6.3.2 EEPROM abnormal------------------------------------------------------------------------------------------------------44
6.3.3Indoor AC fan motor malfunction------ --------------------------------------------------------------------- --------------45
6.3.4 Outdoor DC fan motor fault------------------------------------------------------------------------------- - -------------46
6.3.5 IPM protection------------------------------------------------------------------------------------------------- -------------47
6.3.6 Over-current of the compressor---------------------------------------------------------------------------- ------------48
6.3.7 The communication fault between IPM and outdoor PCB ---------------------------------------- --------------49
6.3.8 Power Supply Over or under voltage fault------------------------------------------------------------ ---------------50
6.3.9 Overheat Protection For Discharge Temperature---------------------------------------------------- --------------51
6.3.10 The communication fault between indoor and outdoor------------------
6.3.11 Loss of synchronism detection--------------------------------------------------------------------------- -------------54
6.3.12 High work-intense protection------------------------------------------------------------------------------ ------------55
7.exponent-------------------------------------------------------------------------------------------------------------- ------------56
8.
9.Removal Procedure----------------------------------------------------------------------------------------------------------71
10.Wiring Diagrams-------------------------------------------------------------------------------------------------------------- 92
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Table of Contents
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Domestic Air Conditioner
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