SiBE37-701_B Troubleshooting by Remote Controller
Troubleshooting 254
Outdoor Unit LA l Malfunction of power unit —
LC l Malfunction of transmission between inverter and control PCB 330
P1 l Inverter over-ripple protection 333
P4 l Malfunction of inverter radiation fin temperature rise sensor 335
PJ l Faulty field setting after replacing main PCB or faulty combination of PCB 337
System U0 k Refrigerant shortage alert 339
U1 l Reverse phase, open phase 341
U2 l Power supply insufficient or instantaneous failure 342
U3 l Check operation is not executed 345
U3 k Check operation is not completed. 345
U4 l Malfunction of transmission between indoor units and outdoor units 346
U5 l Malfunction of transmission between indoor units 349
U5 h Malfunction of transmission between remote controller and indoor unit 349
U7 l Transmission failure (Across outdoor units) 350
U8 l Malfunction of transmission between main and sub remote controllers 356
U9 l Malfunction of transmission between indoor and outdoor units in the same
system
357
UA l Improper combination of indoor and outdoor units, indoor units and remote
controller
358
UC k Address duplication of centralized controller 364
UE l Malfunction of transmission between centralized controller and indoor unit 365
UF l System is not set yet 368
UH l Malfunction of system, refrigerant system address undefined 369
Centralized
Remote
Controller
and
Schedule
Timer
M1 k or h PCB defect 371
M8 k or h Malfunction of transmission between optional controllers for centralized
control
372
MA k or h Improper combination of optional controllers for centralized control 373
MC k or h Address duplication, improper setting 375
Heat
Reclaim
Ventilation
64 k Indoor unit’s air thermistor error —
65 k Outside air thermistor error —
6A k Damper system alarm —
6A l Damper system + thermistor error —
6F k Malfunction of simple remote controller —
6H k Malfunction of door switch or connector —
94 l Internal transmission error —
k: ON h: OFF l: Blink
Malfunction
code
Operation
lamp
Malfunction contents Page
Referred
The system operates for malfunction codes indicated in black squares, however, be sure to check and repair.
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