Si-95 Diagnosis by Malfunction Code
Troubleshooting Inverter K Series 75
1. Diagnosis by Malfunction Code
1.1 Diagnosis by Malfunction Code
Malfunction code Malfunction contents Fan operation Page
A0 Indoor unit: Error of external protection device 77
A1 Indoor unit: PC board defect 78
A3 Indoor unit: Malfunction of drain level control system (33H) 8 79
A6 Indoor unit: Fan motor (M1F) lock, overload 80
A7 Indoor unit: Malfunction of swing flap motor (M1S) 8 81
A9 Indoor unit: Malfunction of moving part of electronic expansion valve
(Y1E)
8 82
AF Indoor unit: Drain level above limit 83
AJ Indoor unit: Malfunction of capacity determination device 84
C4 Indoor unit: Malfunction of thermistor (R2T) for liquid pipe 8 85
C5 Indoor unit: Malfunction of thermistor (R3T) for gas pipes 8 86
C9 Indoor unit: Malfunction of thermistor (R1T) for air inlet 8 87
CJ Indoor unit: Malfunction of thermostat sensor in remote controller 8 88
E0 Outdoor unit: Actuation of safety device 89
E1 Outdoor unit: PC board defect 90
E3 Outdoor unit: Actuation of high pressure switch 91
E4 Outdoor unit: Actuation of low pressure switch 8 92
E9 Outdoor unit: Malfunction of moving part of electronic expansion
valve (Y1E)
8 93
F3 Outdoor unit: Abnormal discharge pipe temperature 8 94
H9 Outdoor unit: Malfunction of thermistor for outdoor air (R1T) 8 95
J3 Outdoor unit: Malfunction of discharge pipe thermistor (R3T) 8 96
J5 Outdoor unit: Malfunction of thermistor (R4T) for suction pipe 8 97
J6 Outdoor unit: Malfunction of thermistor (R2T) for heat exchanger 8 98
JA Outdoor unit: Malfunction of discharge pipe pressure sensor 8 99
JC Outdoor unit: Malfunction of suction pipe pressure sensor 8 100
JH Outdoor unit: Malfunction of oil temperature thermistor (R5T) 8 101
U0 Low pressure drop due to refrigerant shortage or electronic
expansion valve failure
8 102
U1 Negative phase, open phase 8 103
U2 Power supply insufficient or instantaneous failure 8 120
U4 Malfunction of transmission between indoor units 8 104
U5 Malfunction of transmission between remote controller and indoor
unit
105
U7 Malfunction of transmission between outdoor units 8 106
U8 Malfunction of transmission between main and sub remote
controllers
8 107
U9 Malfunction of transmission between indoor and outdoor units or
between outdoor units in the same system
8 108
UA Excessive number of indoor units
Improper combination of indoor and outdoor units (incompatible
refrigerant), improper number of connected indoor units or remote
controllers (inappropriate remote controllers), faulty PCB model
setting (replacement PCB)
8 109
UC Address duplication of central remote controller 8 110
UF Refrigerant system not set, incompatible wiring/piping 8 111
UH Malfunction of system, refrigerant system address undefined 8 112
The system operates for malfunction codes indicated in black squares, however, be sure to
check and repair.
SI-95.BOOK Page 75 Friday, March 31, 2000 10:59 AM
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