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Possible causes
I/U sensor TA error
Sensor TA open or short-circuit
[F10]
(New code)
This is an error of non-volatile EEPROM IC10 on the indoor unit board, which occurs during
operation. Replace the service board.
(About 3 minutes) (About 1 minutes)
(Power on)
“SETTING” appears
on the R/C.
“SETTING” disappears.
LED (D02) on the I/U
board blinks for about
10 seconds (1Hz).
Reboot
(reset)
(Repeated)
Is TA connector
CN104 connected
normally?
Is TA resistor
characteristic
normal?
* See I/U temp. sensor characteristics-1.
Check MCC-1510 board.
Replace it if necessary.
Correct connector connection.
Replace sensor TA.
YES
NO
YES
NO
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Possible causes
Other indoor unit errors
Failure of I/U board
[F29]
(New code)
* If EEPROM is not mounted at power on or if no data can be read/written from/in the EEPROM,
auto address mode is repeated. At this time, the AI-NET central controller indicates code “97”.
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