Service manual

Troubleshooting by Remote Controller SiUS28-902_a
79 Troubleshooting
k: ON h: OFF l: Blink
Malfunction
code
Operation
lamp
Inspection
display
Unit No. Malfunction contents Page
Referred
Indoor Unit A0 lllError of external protection device 85
A1 lllP.C.B. defect, E
2
PROM defect 86
A3 lllMalfunction of drain level control system (S1L) 87
A6 lllFan motor (M1F) lock, overload 89
A7 kllMalfunction of louver motor (M1S) 90
A9 lllMalfunction of moving part of electronic expansion
valve (Y1E)
92
AF khlDrain level above limit 94
AJ lllMalfunction of capacity determination device 95
C4 lllMalfunction of thermistor (R2T) for heat exchanger
(loose connection, disconnection, short circuit, failure)
96
C5 lllMalfunction of thermistor (R3T) for gas pipes (loose
connection, disconnection, short circuit, failure)
97
C9 lllMalfunction of thermistor (R1T) for suction air (loose
connection, disconnection, short circuit, failure)
98
CA lllMalfunction of thermistor for discharge air (loose
connection, disconnection, short circuit, failure)
99
CJ klkMalfunction of thermostat sensor in remote
controller
100
Outdoor Unit E1 lllP.C.B. defect 101
E3 lllActuation of high pressure switch 102
E4 lllActuation of low pressure sensor 104
E5 lllInverter compressor motor lock 106
E6 lllStandard compressor lock or overcurrent —
E7 lllMalfunction of outdoor unit fan motor 108
E9 lllMalfunction of moving part of electronic expansion
valve (Y1E)
109
F3 lllAbnormal discharge pipe temperature 111
F6 lllRefrigerant overcharged 112
H3 khlFailure of high pressure switch —
H4 lllActuation of low pressure switch —
H7 lllAbnormal outdoor fan motor signal —
H9 lllMalfunction of thermistor (R1T) for outdoor air
(loose connection, disconnection, short circuit,
failure)
113
J2 lllCurrent sensor malfunction —
J3 lllMalfunction of discharge pipe thermistor (R2T)
(loose connection, disconnection, short circuit,
failure)
114
J5 lllMalfunction of thermistor (R3T, R5T) for suction
pipe 1,2 (loose connection, disconnection, short
circuit, failure)
115
J6 lllMalfunction of thermistor (R4T) for outdoor unit heat
exchanger (loose connection, disconnection, short
circuit, failure)
116
JA lllMalfunction of high pressure sensor 117
JC lllMalfunction of low pressure sensor 119
L0 lllInverter system error —
L1 lllMalfunction of P.C.B. 121
L4 lllMalfunction of inverter radiating fin temperature rise 122
L5 lllInverter compressor abnormal 123
L8 lllInverter current abnormal 124
L9 lllInverter start up error 126