SiEN18-622 List of Malfunction Code
Troubleshooting 321
Outdoor
Unit
L1 Malfunction of PC board — — — 378
L4 Malfunction of inverter radiating fin temperature rise — — — 379
L5 Inverter compressor motor grounding, short circuit — — — 380
L8 Inverter current abnormal — — — 381
L9 Inverter start up error — — — 382
LAMalfunction of power unit ————
LC Malfunction of transmission between inverter and
control PC board
———383
P1 High voltage of capacitor in main inverter circuit — — — 384
P4 Malfunction of inverter radiating fin temperature rise
sensor
———385
PJ Faulty combination inverter and fan driver,
Malfunction of capacity setting
———386
System
U0 Low pressure drop due to refrigerant shortage or
electronic expansion valve failure
———387
U1Reverse phase / open phase ————
U2 Power supply insufficient or instantaneous failure — — — 389
U3 Check operation is not conducted. — — — 391
U4 Malfunction of transmission between indoor and
outdoor units, etc.
— — 355 392
U5 Malfunction of transmission between remote control
and indoor unit
— 347 — 394
U5 Failure of remote control PC board or setting during
control by remote control
————
U7 Malfunction of transmission between outdoor units ————
U8 Malfunction of transmission between main and sub
remote controls
— 348 — —
U9 Malfunction of transmission between indoor unit and
outdoor unit in the same system
———396
UA Excessive number of indoor units etc. — 349 — 398
UC Address duplication of central remote control — — — 399
UE Malfunction of transmission between central remote
control and indoor unit
———400
UF System is not set yet — — — 402
UH Malfunction of system, refrigerant system address
undefined
———403
UJ Transmission error between outdoor unit and BP unit — — 357 —
9: Blink 8: ON 7: OFF
Malfunction
code
Malfunction contents Page Referred
RA Indoor
Unit
SkyAir
Indoor Unit
BP Unit Outdoor
Unit
The system operates for malfunction codes indicated in black squares, however, be sure to check and repair.
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