Service Manual

SiUS181631EA Error Codes and Description
Troubleshooting 195
Outdoor
Unit
JC Low pressure sensor abnormality
———244
L1 Outdoor unit PCB abnormality
———245
L4 Radiation fin temperature rise
———246
L5 Inverter compressor abnormality
———247
L8 Inverter current abnormality
———248
L9 Compressor start-up error
———249
P1 High voltage of capacitor in main inverter circuit
———250
P4 Radiation fin thermistor abnormality
———251
System U0 Low pressure drop due to refrigerant shortage or
electronic expansion valve abnormality
———252
U2 Power supply insufficient or instantaneous failure
———254
U3 Check operation is not conducted
———255
U4 Signal transmission error between indoor unit and
Branch provider (BP) unit
——222—
U5 Signal transmission error between indoor unit and
remote controller
— 215 — —
U8 Signal transmission error between MAIN remote
controller and SUB remote controller
— 216 — —
System U9 Signal transmission error between indoor unit and
outdoor unit in the same system
———256
UA Mismatching of indoor unit and outdoor unit
— 217 — —
Excessive number of indoor units
———257
UC Address duplication of central remote controller
———258
UE Transmission error between centralized remote
controller and indoor unit
———259
UF System is not set yet
———261
UH System abnormality, refrigerant system address
undefined
———262
UJ Transmission error between outdoor unit and Branch
provider (BP) unit
——224—
Error code Description Reference page
RA Indoor
Unit
SA Indoor
Unit
BP Unit Outdoor
Unit
The system keeps operating even though the error code is indicated, however, be sure to check and repair.