Toshiba MMU-AP0091H service manual Check Method, Check code list, 117

9-2. Check Method

If an trouble occurs, the error code can be retrieved from the main remote controller/central remote controller (LCD display) or the header unit interface P.C. board (7-segment display). Using this self diagnostic function, the trouble can be identified using the table below.

Check code list

The following list shows all fault codes.

•If check code is from indoor remote controller: See “Main remote controller display” in the list.

•If check code is from outdoor unit: See “Outdoor 7-segment display” in the list.

•If check code is from AI-NET central control remote controller: See “AI-NET central control display” in the list.

•If check code is from indoor unit with wireless remote controller: See “Sensor display of receiving unit” in the list.

IPDU: Intelligent Power Drive Unit

¡: Lighting, ¤: Flashing, l : Goes off

ALT.: Flashing is alternately when there are two flashing LED.

SIM: Simultaneous flashing when there are two flashing LED

Check code Wireless remote controller

Main	Outdoor 7-segment display			Sensor block display
			AI-NET central	of receiving unit			Check code name	Detecting device
remote
controller		Auxiliary code	control display	Operation	Timer	Ready
display						Flash
E01	—	—	—	¤ l		l	Communication error between indoor and remote	Remote controller
							controller (Detected at remote controller side)
E02	—	—	—	¤ l		l	Remote controller transmission error	Remote controller
E03	—	—	97	¤ l		l	Communication error between indoor and remote	Indoor
							controller (Detected at indoor side)
E04	—	—	04	l	l	¤	Communication circuit error between indoor/outdoor	Indoor
							(Detected at indoor side)
E06	E06	No. of indoor units in which	04	l	l	¤	Decrease of No. of indoor units	I/F
		sensor has been normally
		received
—	E07	—	—	l	l	¤	Communication circuit error between indoor/outdoor	I/F
							(Detected at outdoor side)
E08	E08	Duplicated indoor addresses	96	¤ l		l	Duplicated indoor addresses	Indoor / I/F
E09	—	—	99	¤ l		l	Duplicated main remote controllers	Remote controller
E10	—	—	CF	¤ l		l	Communication error between indoor MCU	Indoor
		01: Indoor/Outdoor		¤ l
E12	E12	communication	42			l	Automatic address start error	I/F
		02: Communication between
		outdoor units				¤
E15	E15	—	42	l	l		Indoor is nothing during automatic addressing	I/F
E16	E16	00: Capacity over	89	l	l	¤	Capacity over / No. of connected indoor units	I/F
		01 ~: No. of connected units
E18	—	—	97, 99	¤ l		l	Communication error between indoor units	Indoor
E19	E19	00: Header is nothing	96	l	l	¤	Outdoor header units quantity error	I/F
		02: Two or more header units
		01: Outdoor of other line				¤
E20	E20	connected	42	l	l		Other line connected during automatic address	I/F
		02: Indoor of other line
		connected				¤
E23	E23	—	15	l	l		Sending error in communication between outdoor units	I/F
E25	E25	—	15	l	l	¤	Duplicated follower outdoor addresses	I/F
E26	E26	No. of outdoor units which	15	l	l	¤	Decrease of No. of connected outdoor units	I/F
		received signal normally
E28	E28	Detected outdoor unit number	d2	l	l	¤	Follower outdoor unit error	I/F
		01: IPDU1 error
		02: IPDU2 error
		03: IPDU1, 2 error				¤
E31	E31	04: Fan IPDU error	CF	l	l		IPDU communication error	I/F
		05: IPDU + Fan IPDU error
		06: IPDU2 + Fan IPDU error
		07: All IPDU error
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