Toshiba MMK-AP0122H, MMK-AP0072H Troubleshooting, Check method, Check code list, Terminology

12 TROUBLESHOOTING

Check method

On the remote controller (Main remote controller, Central control remote controller) and the interface P.C. board of the outdoor unit (I/F), a check display LCD (Remote controller) or 7-segment display (on the outdoor interface P.C. board) to display the operation is provided. Therefore the operation status can be known. Using this self-diagnosis function, a trouble or position with error of the air conditioner can be found as shown in the table below.

Check code list

The following list shows each check code. Find the check contents from the list according to part to be checked.

•In case of check from indoor remote controller: See “Main remote controller display” in the list.

•In case of check from outdoor unit: See “Outdoor 7-segment display” in the list.

•In case of check from indoor unit with wireless remote controller: See “Sensor block display of receiving unit” in the list.

Terminology

AI-NET : Artificial Intelligence.

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

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