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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
LA
Malfunction 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
U1
Reverse 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.
Summary of Contents for FTKS50BVMB
Page 1: ...SiEN18 622 E Series Service Manual Applied Models zSuper Multi Plus Cooling Only Heat Pump ...
Page 105: ...Refrigerant Flow for Each Operation Mode SiEN18 622 92 Refrigerant Circuit ...
Page 157: ...Indoor Unit SkyAir Models SiEN18 622 144 Function ...
Page 312: ...SiEN18 622 Ceiling Mounted Cassette Type System Configuration 300 ...
Page 424: ...Method of Replacing The Inverter s Power Transistors Modules SiEN18 622 412 Troubleshooting ...
Page 446: ...Wiring Diagrams SiEN18 622 434 Appendix ...
Page 452: ...SiEN18 622 vi Index ...