Service Check Function Si18-525B
324 Troubleshooting
2.5 Sky Air Indoor Unit Error Codes and LED Indication
Symbols
5
: Blinks
4
: On
3
: Off — : No connection with troubleshooting
: High probability of malfunction
: Possibility of malfunction
: Low probability of malfunction
— : No possibility of malfunction (do not replace)
System
Indoor Unit
Remote
Controller
Display
Location of Malfunction Contents of Malfunction
Details of
Malfunction
(Reference
Page)
Other
than PC
Board
PC Board
Outdoor
Unit
Indoor
Unit
Remote
Controller
U5 — Transmission error (between
indoor and remote controller)
354
U8 — Transmission error between
“main” remote controller and
“sub” remote controller
355
UA — — Excessive indoor units
connected to this system.
356
Indoor
Unit
LED
Display
(H1P)
Remote
Controller
Display
Location of Malfunction Contents of Malfunction
Details of
Malfunction
(Reference
Page)
Other
than PC
Board
PC Board
Outdoor
Unit
Indoor
Unit
Remote
Controller
5
————Normal → to outdoor unit —
5
A1 —— — Failure of indoor unit PC
board (For self-diagnosis by
LED, refer to p.314.)
340
4
3
5
A3 — — — Malfunction of drain water
level system
341
5
AF — — — Float switch operation
during compressor stop
343
5
A6
(FHQ only)
— — Indoor unit fan motor
overload / overcurrent / lock
344,345
5
A7 — — Swing flap motor
Malfunction / Lock
347
5
AJ — — Failure of capacity setting 349
5
C4 — — Malfunction of heat
exchanger temperature
sensor system (R2T)
350
5
C5 — — Malfunction of heat
exchanger temperature
sensor system (R3T)
351
5
C9 — — Malfunction of suction air
temperature sensor system
352
5
CJ —— — Malfunction of remote
control air temperature
sensor system
353
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