If you use a wireless remote control, the lamp 
on the photo detector unit will output error codes 
by way of blinking patterns. 
If you use a wired remote control, 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.
Indoor unit
Wired 
remote 
control
Description
OPERATION
lamp
(green)
TIMER
lamp
(orange)
ECONOMY
lamp
(green)
Indoor unit
Wired 
remote 
control
Description
OPERATION
lamp
(green)
TIMER
lamp
(orange)
ECONOMY
lamp
(green)
(1)
(1)
Serial communication error
(1)
(2)
Wired remote control 
communication error
(1)
(5)
Check run unfinished
(2)
(2)
Indoor unit capacity error
(2)
(3)
Combination error
(3)
(2)
Indoor unit PCB model 
information error
(3)
(5)
Manual auto switch error
(4)
(1)
Room temp. sensor error 
(4)
(2)
Indoor unit Heat Ex. Middle temp. 
sensor error
(5)
(1)
Indoor unit fan motor 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)
(10)
Display PCB microcomputers 
communication error 
(7)
(1)
Discharge temp. sensor error
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 error
(9)
(9)
4-way valve error
(10)
(1)
Discharge temp. error
(10) (3)
Compressor temp. error
(10)
(4)
High pressure error
(10)
(5)
Low pressure error
Branch boxes error
Indoor unit display
Wired remote control display (Option) 
If an error occurs, the following display will be shown.
(“Er” will appear in the set room temperature display.)
Error code
ERROR DETECTION
2011.09.13 11
: 0.5s ON / 0.5s OFF
: 0.1s ON / 0.1s OFF
( ) : Number of flashing
INDOOR UNIT 
REMOTE CONTROL
(13)
(2)
(7)
(2)
OPERATION indicator lamp (green)
TIMER indicator lamp (orange)
ECONOMY indicator lamp (green)