Toshiba MMU-AP0091H service manual 144

Check code Check code name Cause of operation

[F04] / [19] TD1 sensor error TD1 sensor Open/Short

(TCC-L / AI-NET)

This check code means detection of Open/Short of TD1 sensor.

Check disconnection of connector (TD1 sensor: CN502, White) and characteristics of sensor resistance value. (Refer to Outdoor unit temperature sensor characteristics.)

If sensor is normal, replace outdoor I/F P.C. board.

Check code Check code name Cause of operation

[F05] / [A1] TD2 sensor error TD2 sensor Open/Short

(TCC-L / AI-NET)

This check code means detection of Open/Short of TD2 sensor.

Check disconnection of connector (TD2 sensor: CN503, Pink) and characteristics of sensor resistance value. (Refer to Outdoor unit temperature sensor characteristics.)

If sensor is normal, replace outdoor I/F P.C. board.

Check code Check code name Cause of operation

	[F06] / [18]	TE1 sensor error	TE1 sensor Open/Short
144	(TCC-L / AI-NET)
	This check code means detection of Open/Short of TE1 sensor.
	Check disconnection of connector (TE1 sensor: CN505, Green) and characteristics of sensor resistance value.
	(Refer to Outdoor unit temperature sensor characteristics.)
	If sensor is normal, replace outdoor I/F P.C. board.
	Check code	Check code name	Cause of operation
	[F07] / [18]	TL sensor error	TL sensor Open/Short
	(TCC-L / AI-NET)

This check code means detection of Open/Short of TL sensor.

Check disconnection of connector (TL sensor: CN521, White) and characteristics of sensor resistance value. (Refer to Outdoor unit temperature sensor characteristics.)

If sensor is normal, replace outdoor I/F P.C. board.

Check code Check code name Cause of operation

[F08] / [1b] TO sensor error TO sensor Open/Short

(TCC-L / AI-NET)

This check code means detection of Open/Short of TO sensor.

Check disconnection of connector (TO sensor: CN507, Yellow) and characteristics of sensor resistance value. (Refer to Outdoor unit temperature sensor characteristics.)

If sensor is normal, replace outdoor I/F P.C. board.

Check code Check code name Cause of operation

[F10] / [0C] Indoor TA sensor error TA sensor Open/Short

(TCC-L / AI-NET)

This check code means detection of Open/Short of TA sensor.

Check disconnection of connector (TA sensor: CN104, Yellow) and characteristics of sensor resistance value. (Refer to Outdoor unit temperature sensor characteristics.)

If sensor is normal, replace indoor P.C. board.

Check code Check code name Cause of operation

[F12] / [A2]	TS sensor error	TS1, TS2 sensor Open/Short
(TCC-L / AI-NET)
Sub-code:01: TS1 sensor	02 : TS2 sensor

This check code means detection of Open/Short of TS sensor.

Check disconnection of connector (TS1 sensor: CN504, White TS2 sensor: CN522, Black) and characteristics of sensor resistance value. (Refer to Outdoor unit temperature sensor characteristics.)

If sensor is normal, replace outdoor I/F P.C. board.

Check code	Check code name	Cause of operation
[F13] / [43]	TH sensor error	IGBT built-in sensor error in A3-IPDU
(TCC-L / AI-NET)
Sub-code:01: Compressor 1 side	02: Compressor 2 side

This check code means IGBT built-in temperature sensor error.

Check connection of connectors CN06 on IPDU P.C. board and CN600 on I/F P.C. board.

If sensor is normal, replace IPDU P.C. board.