Specifications

List of Malfunction Code SiBE18-821
264 Troubleshooting
9: Blink 8: ON 7: OFF
Malfunction
code
Malfunction contents Page Referred
RA Indoor
Unit
SkyAir
Indoor Unit
BP Unit Outdoor
Unit
System U0 Low pressure drop due to refrigerant shortage or
electronic expansion valve failure
———329
U1Reverse phase / open phase ————
U2 Power supply insufficient or instantaneous failure — — — 331
U3 Check operation is not conducted. — — — 333
U4 Malfunction of transmission between indoor and
outdoor units, etc.
——297334
U5 Malfunction of transmission between remote
controller and indoor unit
— 289 — 336
U5 Failure of remote controller PC board or setting
during control by remote controller
————
U7Malfunction of transmission between outdoor units————
U8 Malfunction of transmission between main and sub
remote controllers
— 290 — —
U9 Malfunction of transmission between indoor unit and
outdoor unit in the same system
———331
UA Excessive number of indoor units etc. — 291 — 333
UC Address duplication of central remote controller — — — 341
UE Malfunction of transmission between central remote
controller and indoor unit
———342
UF System is not set yet — — — 333
UH Malfunction of system, refrigerant system address
undefined
———334
UJ Transmission error between outdoor unit and BP unit — — 299 —
The system operates for malfunction codes indicated in black squares, however, be sure to check and repair.