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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
15
10
5
010 304020 50
5kΩ at 25˚C
Temperature (˚C)
Note (1) 22.5 kΩ at -6˚C
Return air thermistor (Th
I-
A)
Indoor unit heat exchanger thermistor
(Th
I-
R1, R2)
Resistance temperature characteristics
Resistance (kΩ)
YES
YES
NO
NO
Is the indoor
unit heat exchanger
thermistor connector
connection OK?
Correction
Are characteristics
of indoor unit heat
exchanger thermistor OK
or is there any
broken wire?
Defective indoor unit control PCB
Replace-ment (Defective indoor unit
heat exchanger thermistor input circuit)
Defective indoor unit heat exchanger
thermistor Replacement
YES YES
NO
NO
Is the return air
thermistor connector
connection OK?
Correction
Is the return air
thermistor characteristics
OK or is there a
broken wire?
Defective return air
thermistor Replacement
Defective indoor unit control PCB
Replacement (Defective return air
thermistor input circuit)
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. If this state is detected again within 60 minutes after the
first 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. If this state is detected again within 60 minutes after the
first detection.
Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.
Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.