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Contents of Remote Controller Switch Alarm Display
ON:    Blinking:    OFF: 
Abnormal 
display
Wireless remote 
controller 
receiver display
Alarm contents Error location
Operation
Timer
Standby
Remotecontroller•IndoorUnit
E01
Operating lamp 
blinking
Faulty remote controller •Replace the remote controller
Disconnection / Contact failure of remote controller wiring •Correct the remote controller wiring
CHK (check) pins on the indoor unit control PCB are short 
circuited
•Remove the short
In the case of non-group control
· 
Power supply OFF of outdoor unit
·  
Disconnection / Contact failure of indoor / outdoor 
control line *
In the case of group control
Auto address operation was not carried out
•Execute auto address setting
Faulty setting of EEPROM (IC010) on indoor unit •Replace the indoor unit EEPROM
E02
Faulty remote controller •Replace the remote controller
Wrong wiring of remote controller •Correct the remote controller wiring
E03
Error in indoor unit receiving signal from remote controller 
(central)
•Check the indoor unit control PCB
•Check the remote controller wiring
•Check the indoor / outdoor control line *
E04
Standby lamp 
blinking
Disconnection / Contact failure of indoor / outdoor control 
line *
•Check the electrical connection of indoor / outdoor control 
line *
•Replace the indoor unit control PCB
•Replace the outdoor unit control PCB
•Check the electrical connection of fuse (F302) on indoor 
unit control PCB (sub) 
In the case of the fuse opened on an indoor unit control 
PCB (sub), after correcting wiring connection, it substitutes 
an EMG plug for OC plug
•Faulty indoor unit control PCB
•Faulty outdoor unit control PCB
•Communication circuit fuse (F302) on indoor unit control 
PCB (sub) opened
•Fuse on outdoor unit control PCB opened
Since failure of an outdoor fan motor is considered as a 
cause, both outdoor unit control PCB and outdoor unit 
fan motor are exchanged simultaneously
•In the case of the fuse opened on an outdoor unit control 
PCB, replace both outdoor unit control PCB  (CR / HIC)  
and outdoor unit fan motor simultaneously
•Setting error of indoor unit address
•Capacity of indoor / outdoor units is mismatched.
•Capacity and address re-setting after correcting the 
combination of units
E08
Operating lamp 
blinking
Duplication of indoor unit address setting •Indoor unit address re-setting
E09
Error because of more than one remote controller setting 
to main
•Correct the setting
E18
•Disconnection of wiring between main unit and additional 
units
•Contact failure of wiring
•Faulty indoor unit control PCB (main or addition)
•Correct the wiring connection
•Replace the wiring
•Replace the indoor unit control PCB
F01
Operating and 
timer lamp blinking 
alternately
Indoor heat exchanger temperature sensor (E1) trouble
•Check the indoor unit heat exchanger temperature sensor 
(E1)
•Check the indoor unit control PCB
F02 Indoor heat exchanger temperature sensor (E2) trouble
•Checktheindoorunitheatexchangertemperaturesensor
(E2)
•ChecktheindoorunitcontrolPCB
F10 Indoor air temperature sensor (TA) trouble
•Checktheindoorunitairtemperaturesensor(TA)
•ChecktheindoorunitcontrolPCB
F29
Operating and 
timer lamp blinking 
simultaneously
Indoor unit EEPROM trouble
•ChecktheindoorunitEEPROM
•ChecktheindoorunitcontrolPCB
L02
Operating 
and standby 
lamps blinking 
simultaneously
Setting error, indoor / outdoor unit type / model  
mismatched
•Addressre-settingaftercorrectingthecombinationofunits
L03 Duplication of main indoor unit address in group control •Correctthegroup(mainandaddition)
L07
Group control wiring is connected to individual control 
indoor unit
•Correcttheindoorunitaddress
L08 Indoor unit address is not set •Correcttheindoorunitaddress
L09 Indoor unit capacity is not set •Correctthecapacitysettingofindoorunits
SUPPLEMENT
* 3-Line  :  Connection cable between outdoor and indoor unit
  2-Line  :  Inter-unit control wiring
01_330918_EU_Eng.indb   76 2021/9/9   11:27:06