![background image](http://html1.mh-extra.com/html/daikin/sky-air-b-series-r-410a/sky-air-b-series-r-410a_service-manual_2460071148.webp)
Si21-205
Self-Diagnosis by Remote Controller
Troubleshooting
137
2.4
Remote Controller Display Malfunction Code and
Contents
Notes:
1. There is a possibility of open phase power supply, check power supply also.
Code
Malfunction / Remarks
A1
Indoor unit’s PC board faulty
A3
Drain water level abnormal
A5
Freeze-up protector “or stopped by high pressure control”
A6
Indoor fan motor overloaded, overcurrent or locked (Note 1)
A7
Swing flap motor malfunction/Lock
AF
Failure of Drain System
AH
Air cleaner faulty
Only the air cleaner does not function.
AJ
Type set improper
Capacity data is wrongly preset. Or there is nothing programmed in the data hold IC.
C4
Sensor (R2T) for heat exchanger temperature is fault
C5
Sensor (R3T) for heat exchanger temperature is fault
C9
Sensor for suction air temperature is fault
CJ
Sensor for remote controller is fault
The remote controller thermistor does not function, but the system thermo run is possible.
U4
Transmission error (indoor unit-outdoor unit) (Note 1)
Incorrect wiring between indoor and outdoor units or malfunction of the PC board mounted on the
indoor and the outdoor units.
If UF is shown, the wiring between the indoor and outdoor units is not properly wired. Therefore,
immediately disconnect the power supply and correct the wiring. (The compressor and the fan
mounted on the outdoor unit may start operation independent of the remote controller operation.)
U5
Transmission error (indoor unit-outdoor unit)
Transmission is improper between the indoor unit and the remote controller.
U8
Malfunction in transmission between main and sub remote controls.
(Malfunction in sub remote control.)
UA
Miss setting for multi system
Setting is wrong for selector switch of multi-system. (see switch SS2 on the main unit’s PC board)
Incorrect combination with indoor unit and outdoor unit
UC
Central control address overlapping
Summary of Contents for Sky Air B-Series R-410A
Page 7: ...Si21 205 vi Table of Contents ...
Page 15: ...Models Si21 205 4 Model Name and Power Supply ...
Page 16: ...Si21 205 Functions 5 Part 2 Functions 1 List of Functions 6 ...
Page 35: ...Wireless Remote Controller Si21 205 24 Remote Controller ...
Page 79: ...Settings Concerning Maintenance Si21 205 68 Field Setting Detail of PCB 2 ...
Page 83: ...Maintenance Mode Setting Si21 205 72 Field Setting ...
Page 239: ...Troubleshooting for Outdoor Unit 50 60 class Si21 205 228 Troubleshooting ...
Page 321: ...Outdoor Unit 50 60 class Si21 205 310 Removal Procedure ...