-
253
-
YES
YES
NO
NO
Is the indoor
unit heat exchanger
thermistor connector
connection OK?
Correct it
Are characteristics
of indoor unit heat
exchanger thermistor OK?
Defective indoor unit control PCB
Replace-ment (Defective indoor unit
heat exchanger thermistor input circuit)
5
10
15
0
20
40
60
80
100
Temperature (ºC)
Resistance-temperature characteristics
Return air thermistor (Th
I-
A)
Indoor unit heat exchanger thermistor
(Th
I-
R1, R2)
Thermistor resistance (k
Ω)
Indoor unit heat exchanger thermistor
defective Replace it
4
Error display :
E6
[Defective indoor unit heat exchanger thermistor]
5
Error display :
E7
[Detective return air thermistor]
Indoor unit
Red LED
Green LED
1 time flash
Keeps flashing
Red LED
Green LED
Stays OFF
Keeps flashing
Outdoor unit
Indoor unit
Red LED
Green LED
1 time flash
Keeps flashing
Red LED
Green LED
Stays OFF
Keeps flashing
Outdoor unit
YES
YES
NO
NO
Is the air return
thermistor connector
connection OK?
Correct it
Is the return air thermistor
characteristics OK?
Indoor unit control PCB is defective.
Replace it.
Return air thermistor is
defective. Replace it.
Note (1) Characteristics as per the above
graph.
Display condition
If a temperature of –50ºC or lower is detected continuously for 5 seconds or longer by the thermistor, the compres-
sor stops. After a 3 minute delay, the compressor restarts. The error occurs when this state is detected again within
60 minutes after the fi rst detection.
Display condition
If a temperature of –50ºC or lower is detected continuously for 5 seconds or longer by the thermistor, the compres-
sor stops. After a 3 minute delay, the compressor restarts. The error occurs when this state is detected again within
60 minutes after the fi rst detection.
