Toshiba MMU-AP0091H service manual 126, Status Error detection condition Check item position

		Check code
				Detected	Check code	Status	Error detection condition	Check item (position)
Main		Outdoor 7-segment display	AI-NET
				position	name
remote			central control
controller	Check code	Sub-code	remote controller
E31	E31	01: IPDU1 error	CF	I/F	IPDU	All stop	Communication of each IPDU	• Check connection of communication connector and
		02: IPDU2 error			communication		(P.C. board) in inverter box	disconnection between IPDU and I/F P.C. board.
		03: IPDU1, 2 errors			error		interrupted.	• Check outdoor P.C. board (I/F, IPDU, Fan IPDU) error.
		04: Fan IPDU error						• Check external noise.
		05: IPDU1 + Fan IPDU error						• Check power supply P.C. board for fan error.
		06: IPDU2 + Fan IPDU error

07:All IPDU error or communication error between IPDU and I/F P.C. board or outdoor I/F P.C. board error

	F01	—	—	OF	Indoor unit	Indoor TCJ	Corresponding	• Resistance value of sensor is	• Check connection/cabling of TCJ sensor connector.
						sensor error	unit only stops	infinite or zero. (Open/Short)	• Check characteristics of TCJ sensor resistance value.
									• Check indoor P.C. board error.
	F02	—	—	Od	Indoor unit	Indoor TC2	Corresponding	• Resistance value of sensor is	• Check connection/cabling of TC2 sensor connector.
						sensor error	unit only stops.	infinite or zero (Open/Short).	• Check characteristics of TC2 sensor resistance value.
									• Check indoor P.C. board error.
	F03	—	—	93	Indoor unit	Indoor TC1	Corresponding	• Resistance value of sensor is	• Check connection/cabling of TC1 sensor connector.
						sensor error	unit only stops.	infinite or zero (Open/Short).	• Check characteristics of TC1 sensor resistance value.
126									• Check indoor P.C. board error.
	F04	F04	—	19	I/F	TD1 sensor	All stop	• Resistance value of sensor is	• Check connection of TD1 sensor connector.
						error		infinite or zero (Open/Short)	• Check characteristics of TD1 sensor resistance value.
									• Check outdoor P.C. board (I/F) error.
	F05	F05	—	A1	I/F	TD2 sensor	All stop	• Resistance value of sensor is	• Check connection of TD2 sensor connector.
						error		infinite or zero (Open/Short)	• Check characteristics of TD2 sensor resistance value.
									• Check outdoor P.C. board (I/F) error.
	F06	F06	—	18	I/F	TE1 sensor	All stop	• Resistance value of sensor is	• Check connection of TE1 sensor connector.
						error		infinite or zero (Open/Short).	• Check characteristics of TE1 sensor resistance value.
									• Check outdoor P.C. board (I/F) error.
	F07	F07	—	18	I/F	TL sensor error	All stop	• Resistance value of sensor is	• Check connection of TL sensor connector.
								infinite or zero (Open/Short).	• Check characteristics of TL sensor resistance value.
									• Check outdoor P.C. board (I/F) error.
	F08	F08	—	1b	I/F	TO sensor	All stop	• Resistance value of sensor is	• Check connection of TO sensor connector.
						error		infinite or zero (Open/Short).	• Check characteristics of TO sensor resistance value.
									• Check outdoor P.C. board (I/F) error.
	F10	—	—	OC	Indoor	Indoor TA	Corresponding	• Resistance value of sensor is	• Check connection/cabling of TA sensor connector.
						sensor error	unit only stops.	infinite or zero (Open/Short).	• Check characteristics of TA sensor resistance value.
									• Check indoor P.C. board error.
	F12	F12	01: TS1	A2	I/F	TS1, TS2	All stop	• Resistance value of sensor is	• Check connection of TS1 or TS2 sensor connector.
			02: TS2			sensor error		infinite or zero (Open/Short).	• Check characteristics of TS1, TS2 sensor resistance value.
									• Check outdoor P.C. board (I/F) error.