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9. Timer lamp blinking: blinking 9 times
[Situation]
The timer lamp blinks 9 times and the product will not run.
[Estimated failure location]
[Cautions]
Starting the product by remote control will initiate failure detection.
(Merely turning on the power will not activate the failure detection function.)
[Diagnosis flow]
Initiating troubleshooting
Are the room temperature thermistor, heat exchanger
thermistor connector (CN4)
Detach the connector (CN4) from the room
temperature thermistor and heat exchanger
thermistor and measure the thermistor resistances.
Did the resistances almost agree with those indicated
in the right-hand figure?
The product will begin detecting failures if it is
close to a wire break or short-circuit.
Replace the "indoor control P.W.B".
Loose connector, wire break, or short-circuit in the room temperature
thermistor, heat exchanger thermistor.
securely inserted?
Yes
Yes
No
Correct the connectors.
No
Replace the room temperature and
heat exchange thermistor.
Thermistor characteristics (resistance)
40
30
20
10
0
0
10
Thermistor temperature
126
20
30
40
50
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