ESIE09-08A Troubleshooting by Remote Control
Troubleshooting 137
: ON : OFF c: Blink
Malfunction
code
Operation
lamp
Malfunction contents Page
Referred
A1 c PC board defect, E
2
PROM defect 142
A6 c Pump error 143
A9 c Malfunction of moving part of electronic expansion valve (Y1E) 144
AJ c Malfunction of capacity setting 147
C1 c Failure of transmission (between indoor unit PC board and fan PC board) 148
C4 c Malfunction of thermistor (R3T) for R-410A liquid/indoor unit (loose connection,
disconnection, short circuit, failure)
150
C5 c Malfunction of thermistor (R2T) for tank thermistor (loose connection, disconnection,
short circuit, failure)
151
C9 c Malfunction of thermistor (R4T) for return water thermistor (loose connection,
disconnection, short circuit, failure)
152
CA c Malfunction of thermistor (R5T) for leaving water temperature (loose connection,
disconnection, short circuit, failure)
153
CJ Malfunction of thermostat sensor in remote control 154
E1 c PC board defect 155
E3 c Actuation of high pressure switch 157
E4 c Actuation of low pressure sensor 162
E5 c Compressor motor lock 166
E6 c Standard compressor lock or over current —
E7 c Malfunction of outdoor unit fan motor 168
E9 c Malfunction of moving part of electronic expansion valve (Y1E, Y3E) 170
F3 c Abnormal discharge pipe temperature 174
H9 c Malfunction of thermistor (R1T) for outdoor air (loose connection, disconnection, short
circuit, failure)
176
J2 c Current sensor malfunction —
J3 c Malfunction of discharge pipe thermistor (R2T, R6T) (loose connection, disconnection,
short circuit, failure)
177
J5 c Malfunction of thermistor (R3T, R5T, R7T) for suction pipe (loose connection,
disconnection, short circuit, failure)
179
J6 c Malfunction of thermistor (R6T) for heat exchanger (loose connection, disconnection,
short circuit, failure)
181
J7 c Malfunction of thermistor (R7T) for outdoor unit liquid pipe 182
J9 c Malfunction of subcooling heat exchanger gas pipe thermistor (R4T) 183
JA c Malfunction of high pressure sensor IU/OU 184
JC c Malfunction of low pressure sensor IU/OU 186
L1 c Malfunction of PC board 188
L4 c Malfunction of inverter radiating fin temperature rise 190
L5 c Inverter compressor abnormal 192
L8 c Inverter current abnormal 194
L9 c Inverter start up error 196
LC c Malfunction of transmission between inverter and control PC board 198
P1 c High voltage of capacitor in main inverter circuit. 201
PJ c Faulty combination of PCB 203
System U0 Low pressure drop due to refrigerant shortage or electronic expansion valve failure 204
U2 c Power supply insufficient or instantaneous failure 206
U4 c Malfunction of transmission between indoor and outdoor unit 210
U5 c Malfunction of transmission between remote control and indoor unit 213
U5 Failure of remote control PC board or setting during control by remote control 213
U7 c Malfunction of transmission outdoor unit 214
U8 c Malfunction of transmission between main and sub remote controls (malfunction of sub
remote control)
215
UA c Communication error between outdoor unit and indoor unit 216
UF c System is not set yet 204
UH c Malfunction of system, refrigerant system address undefined 205
The system operates for malfunction codes indicated in black squares, however, be sure to check and repair.
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