Daitsu DS-12KIDT-2 - Page 39

Air Conditioner Service Manual
39
F4
Cooling system gas flow abnormal
PROTECTION..
Please check the troubleshooting for detail.
F5
PFC PROTECTION
Please check the troubleshooting for detail.
F6
The Compressor lack of phase / Anti-phase
PROTECTION.
Please check the troubleshooting for detail.
F7
IPM Module temperature PROTECTION
Please check the troubleshooting for detail.
F8
4-Way Value reversing abnormal..
Please check the troubleshooting for detail.
F9
The module temperature test circuit failure.
ODU PCB
FA
The compressor Phase-current test circuit
failure.
ODU PCB
Fb
Limiting/Reducing frequency for Over load
protection on Cooling/Heating mode.
Querying by press remote controller
FC
Limiting/Reducing frequency for High power
consumption protection.
Querying by press remote controller
FE
Limiting/Reducing frequency for Module
current protection ( phase current of
compressor).
Querying by press remote controller
FF
Limiting/Reducing frequency for Module
temperature protection.
Querying by press remote controller
FH
Limiting/Reducing frequency for Compressor
driving protection.
Querying by press remote controller
FP
Limiting/Reducing frequency for anti-
condensation protection..
Querying by press remote controller
FU
Limiting/Reducing frequency for anti-frost
protection.
Querying by press remote controller
Fj
Limiting/Reducing frequency for Discharge
over temperature protection.
Querying by press remote controller
Fn
Limiting/Reducing frequency for ODU AC
Current protection.
Querying by press remote controller
Fy
Gas leakage protection
Please check the troubleshooting for detail.
bf
TVOC sensor failure（IDU failure, optional）
Querying by press remote controller
bc
PM2.5 sensor failure（IDU failure, optional）
Querying by press remote controller
bj
Humidity sensor failure. （IDU failure）
Querying by press remote controller
Note: Remote controller FAILURE CODE Querying function
As shown in the failure codes, some of the codes (Fb~bj) need to press remote control for inspection.
While unit on operation, press the ECO button 8 times with 8 seconds, the buzzer BIBI 2 times, you can inspect
the special failure code as Fb ~Fn, bj etc.