Specifications

260
4
[Duplicated indoor unit No. or More than 49 indoor unit are connected.]
5
[Defective indoor unit heat exchanger thermistor]
6
[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
Indoor unit
Red LED
Green LED
1 time flash
Keeps flashing
Red LED
Green LED
Stays OFF
Keeps flashing
Outdoor unit
Is the indoor unit
No. duplicated or
More than 49 indoor
unit are connected?
Correction of unit No.
setting
YES
(1)
(2)
NO
Defective indoor unit
PCB Replacement
(defective unit number circuit)
15
10
5
010 304020 50
5kΩ at 25˚C
Temperature (˚C)
Note (1) 22.5 kΩ at -6˚C
Return air thermistor (Th
1-A)
Indoor unit heat exchanger thermistor
(Th
1-R)
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 PCB Replace-
ment (Defective indoor unit heat
exchanger themistor input circuit)
Defective indoor unit heat exchanger
themistor 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 PCB
Replacement (Defective return air
thermistor input circuit)
Notes (1) When correcting the unit number, check again the pairing of indoor/
outdoor units (same Number assigned to coupled units) is correct.
(2) If it is normalized by changing PCB, judge the unit number input
circuit is defective.
Note (1) Characteristics as per the above
graph.
Error display:
Error display:
Error display: