Panasonic R410A service manual Service procedures, Alarms “F04,” “F06,” “F07,” “F08,” “F12”

4. Service procedures

(5) [Alarms “F04,” “F06,” “F07,” “F08,” “F12”] Sensor trouble

Are connectors
CN020, 021, 022, 023,	No
and 024 (TD, TO, C1, C2, and		Correct the connector
TS sensors) connected		connections.
correctly to the outdoor unit
control PCB?

Yes

Are the TD, TO, C1,	No	Replace the TD, TO, C1,
C2, and TS sensor resistance*
		C2, or TS sensor.
characteristics OK?

* Refer to “4-4. Table of Thermistor Characteristics.”

Yes

Check the outdoor unit control PCB.

Replace if PCB has failed.

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