Troubleshooting at the remote control LCD
This is possible only on the wired remote control.
If an error occurs, the following display will be shown.
("EE" will appear in the set room temperature display.)
Unit number
Error code
SU
MO
TU
WE
TH FR
SA
Code Error contents
Indoor signal error
Wired remote controller abnormal
Indoor room temperature sensor error
Indoor heat exchanger temperature sensor (middle) error
Indoor heat exchanger temperature sensor (inlet) error
Float switch operated
Outdoor discharge pipe temperature sensor error
Outdoor heat exchanger temperature sensor (outlet) error
Outdoor temperature sensor error
Compressor temperature sensor error
2-way valve temperature sensor error
3-way valve temperature sensor error
Outdoor heat exchanger temperature sensor (middle) error
Indoor manual auto switch abnormal
Power supply frequency detection error
IPM protection
CT error
Compressor location error
Outdoor fan error
Connected indoor unit abnormal
Outdoor unit computer communication error
Indoor fan abnormal
Discharge temperature error
Exessive high pressure protection on cooling
4-way valve abnormal
Pressure switch abnormal
Compressor temperature error
Active filter abnormal
PFC circuit error
01 13
26 27
00
02
04
28
09
0C
06
0A
15
1d
1E
29
20
2A
17
18
1A
1b
1F
1c
12
0F
24
2c
16
2b
19
25
If "CO" appears in the unit number display, there is a remote control
error. Refer to the installation instruction sheet included with the
remote control.
2007.03.01 13
ERROR CONTENTS
REMOTE CONTROL UNIT
Make a TEST RUN in accordance with the
installation instruction sheet for the indoor unit.
OUTDOOR UNIT LEDS
When a malfunction occurs in the outdoor unit,
the LED on the circuit board lights to indicate the error.
Refer to the following table for the description of each
error according to the LED.
Error contents
Communication error
(Indoor unit - Outdoor unit)
Discharg pipe temperature sensor
Outdoor heat exchanger temperature (outlet) sensor
Outdoor heat exchanger temperature (mid) sensor
Outdoor temperature sensor
Compressor temperature sensor
Heat sink temperature sensor
Pressure switch abnormal
IPM error
Compressor rotor position cannot detect
Compressor cannot operate
Outdoor fan abnormal (upper fan)
Outdoor fan abnormal (lower fan)
Pump down operation
No error
LED
1 flash
2 flash
3 flash
4 flash
5 flash
Discharge pipe temperature abnormal6 flash
7 flash
8 flash
9 flash
Compressor temperature abnormal10 flash
12 flash
13 flash
14 flash
15 flash
16 flash
1 sec. on/
1 sec. off
repeat
Protect operation
5 sec. on/
1 sec. off
repeat
off
