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Is CN (Tr sensor connector)
connected properly?
Is Tr sensor resistance value
(5KO at 2 5
?
) normal?
Indoor P. C. board is defective.
Replace P. C. b o a rd .
Connect CN properly.
Replace TA sensor.
Is CN (T P 1 sensor connector)
connected properly?
Is T P 1 sensor resistance value
(5KO at 2 5
?
) normal?
Indoor P. C. board is defective.
Replace P. C. b o a rd .
Connect CN properly.
Replace TC sensor.
Y E S
Y E S
Y E S
Y E S
N O
N O
N O
N O
Indoor Tr sensor
Indoor Tr sensor
Indoor Tr sensor
Indoor Tr sensor
error
error
error
error
Indoor T P
Indoor T P
Indoor T P
Indoor T P1
1
1
1 sensor
sensor
sensor
sensor
error
error
error
error