If you use a wireless remote controller, the lamp on the photo
detector unit will output error codes by way of blinking patterns.
If you use a wired remote controller, error codes will appear
on the remote control display.
See the lamp blinking patterns and error codes in the table.
An error display is displayed only during operation.
Error display
Error code Description
OPERATION
lamp
(green)
TIMER
lamp
(orange)
ECONOMY
lamp
(green)
●
(1)
●
(1)
◊
Serial communication error
●
(1)
●
(2)
◊
• Wired remote controller
communication error
• Server room control
communication error
●
(1)
●
(5)
◊
Check run unfinished
Automatic airflow adjustment error
●
(1)
●
(6)
◊
Peripheral unit transmission PCB
connection error
●
(1)
●
(8)
◊
External communication error
●
(2)
●
(1)
◊
Unit number or Refrigerant circuit
address setting error
[Simultaneous Multi]
●
(2)
●
(2)
◊
Indoor unit capacity error
●
(2)
●
(3)
◊
Combination error
●
(2)
●
(4)
◊
• Connection unit number error
(indoor slave unit)
[Simultaneous Multi]
• Connection unit number error
(indoor unit or branch unit)
[Flexible Multi]
●
(2)
●
(6)
◊
Indoor unit address setting error
●
(2)
●
(7)
◊
Primary unit, secondary unit setup error
[Simultaneous Multi]
●
(2)
●
(9)
◊
Connection unit number error in
wired remote controller system
●
(3)
●
(2)
◊
Indoor unit PCB model
●
(3)
●
(1)
◊
Power supply interruption error
information error
●
(3)
●
(3)
◊
Indoor unit motor electricity
consumption detection error
●
(3)
●
(5)
◊
Manual auto switch error
●
(3)
●
(9)
◊
Indoor unit power supply error for
fan motor
●
(3)
●
(10)
◊
Indoor unit communication circuit
(wired remote controller) error
●
(4)
●
(1)
◊
Room temp. sensor error
●
(4)
●
(2)
◊
Indoor unit heat ex. middle temp.
sensor error
●
(4)
●
(4)
◊
Human sensor error
●
(5)
●
(1)
◊
Indoor unit fan motor error
●
(5)
●
(3)
◊
Drain pump error
●
(5)
●
(4)
◊
Electric air cleaner reverse VDD
error
●
(5)
●
(5)
◊
Filter set error
●
(5)
●
(7)
◊
Damper error
●
(5)
●
(8)
◊
Intake grille error
●
(5)
●
(9)
◊
Indoor unit fan motor 2 error
(Left side fan)
●
(5)
●
(10)
◊
Indoor unit fan motor 3 error
(Right side fan)
Error display
Error code Description
OPERATION
lamp
(green)
TIMER
lamp
(orange)
ECONOMY
lamp
(green)
●
(6)
●
(1)
◊
Outdoor unit reverse/missing
phase and wiring error
●
(5)
●
(15)
◊
Indoor unit error
●
(6)
●
(2)
◊
Outdoor unit main PCB model
information error or
communication error
●
(6)
●
(3)
◊
Inverter error
●
(6)
●
(4)
◊
Active filter error, PFC circuit error
●
(6)
●
(5)
◊
Trip terminal L error
●
(6)
●
(8)
◊
Outdoor unit rush current limiting
resister temp. rise error
●
(6)
●
(10)
◊
Display PCB microcomputers
communication error
●
(7)
●
(1)
◊
Discharge temp. sensor error
●
(7)
●
(2)
◊
Compressor temp. sensor error
●
(7)
●
(3)
◊
Outdoor unit Heat Ex. liquid temp.
sensor error
●
(7)
●
(4)
◊
Outdoor temp. sensor error
●
(7)
●
(5)
◊
Suction Gas temp. sensor error
●
(7)
●
(6)
◊
• 2-way valve temp. sensor error
• 3-way valve temp. sensor error
●
(7)
●
(7)
◊
Heat sink temp. sensor error
●
(8)
●
(2)
◊
• Sub-cool Heat Ex. gas inlet
temp. sensor error
• Sub-cool Heat Ex. gas outlet
temp. sensor error
●
(8)
●
(3)
◊
Liquid pipe temp. sensor error
●
(8)
●
(4)
◊
Current sensor error
●
(8)
●
(6)
◊
• Discharge pressure sensor error
• Suction pressure sensor error
• High pressure switch error
●
(9)
●
(4)
◊
Trip detection
●
(9)
●
(5)
◊
Compressor rotor position
detection error (permanent stop)
●
(9)
●
(7)
◊
Outdoor unit fan motor 1 error
●
(9)
●
(9)
◊
4-way valve error
●
(9)
●
(8)
◊
Outdoor unit fan motor 2 error
●
(9)
●
(10)
◊
Coil (expansion valve) error
●
(10)
●
(1)
◊
Discharge temp. error
●
(10)
●
(3)
◊
Compressor temp. error
●
(10)
●
(4)
◊
High pressure error
●
(10)
●
(5)
◊
Low pressure error
●
(13)
●
(2)
◊
Branch boxes error
[Flexible Multi]
Display mode
●
: 0.5s ON / 0.5s OFF
◊
: 0.1s ON / 0.1s OFF
( ) : Number of flashing
Troubleshooting with the indoor unit display
OPERATION indicator lamp (green)
TIMER indicator lamp (orange)
ECONOMY indicator lamp (green)
ERROR DETECTION
2018.03.06 12
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