SiUS281811EA Troubleshooting by Error Codes
Part 6 Service Diagnosis 209
:In the case of error codes identified, system operation continues, however, be sure to check and
repair.
∗1. The system may not continue operation depending on the conditions.
Outdoor Unit
E1 l Outdoor main PCB abnormality 252
E3 l Activation of high pressure switch 253
E4 l Activation of low pressure sensor 255
E5 l Inverter compressor motor lock 257
E7 l Outdoor fan motor abnormality 259
E9 l Electronic expansion valve coil abnormality 261
F3 l Discharge pipe temperature abnormality 262
F6 l Refrigerant overcharged 263
H9 l Outdoor air thermistor abnormality 264
J3 l Discharge pipe thermistor abnormality 264
J5 l Suction pipe thermistor abnormality 264
J6 l Outdoor heat exchanger deicer thermistor abnormality 264
J7 l Outdoor heat exchanger liquid pipe thermistor abnormality 264
J9 l Subcooling heat exchanger gas pipe thermistor abnormality 264
JA l High pressure sensor abnormality 265
JC l Low pressure sensor abnormality 266
L1 l PCB (for inverter compressor) abnormality 267
L4 l Radiation fin temperature rise abnormality 268
L5 l Inverter compressor instantaneous overcurrent 269
L8 l Inverter compressor overcurrent 270
L9 l Inverter compressor startup abnormality 271
LC l Transmission error (between microcomputers on the outdoor main PCB) 272
P1 l Inverter circuit capacitor high voltage 273
P4 k Radiation fin thermistor abnormality 274
System
U0 k Refrigerant shortage 275
U2 l Power supply insufficient or instantaneous abnormality 277
U3 l Check operation not executed 279
U4 l Transmission error between indoor units and outdoor units 280
U5 l Transmission error between remote controller and indoor unit 282
U8 l Transmission error between main and sub remote controllers 283
U9 l Transmission error between indoor and outdoor units in the same system 284
UA l
Improper combination of indoor and outdoor units, indoor units and remote
controller
285
Incorrect electric heater capacity setting (FTQ-TA only) 287
UC k Address duplication of centralized controller 288
UE l Transmission error between centralized controller and indoor unit 289
UF l System not set 290
UH l System abnormality, refrigerant system address undefined 291
Error code
Operation
lamp
Description
Reference
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