Toshiba MMU-AP0151MH Troubleshooting, Confirmation and check Check method, Check code list

9 TROUBLESHOOTING

Confirmation and check

Check method

When a fault occurs in the air conditioner, the check code and the indoor unit No. will appear on the display part of the remote controller.

The check code will only be displayed while the unit is in operation.

If the display disappears, operate the air conditioner according to the following “Confirmation of error history” for confirmation.

Confirmation of error history

When a fault occurs in the air conditioner, the error history can be confirmed with the following procedure. (The error history is stored in memory and can contain up to 4 errors).

This history can be confirmed from either the operating status or the stop status.

31

CODE No.

UNIT No.

R.C. No.

Check code	Indoor unit No. in which
	an error occurred

TEMP.		ON / OFF
2
TIMER SET	FAN	MODE
TIME	SWING/FIX	VENT
FILTER
RESET TEST SET CL	UNIT

3 1

On the remote controller (Main remote controller, Central control remote controller) and the interface P.C. board of the outdoor unit, a check display LCD (Remote controller) or 7-segment display (on the outdoor interface P.C. board) operation is provided. Therefore the operation status can be known. Using this self-diagnosis function, a fault and the location of this fault within the air conditioning system can be located, 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 a fault from the indoor remote controller: See “Main remote controller display” in the list.

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

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

Terminology	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
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	—	—	¤ l		l		Communication error between indoor and remote	Indoor
							controller (Detected at indoor side)
E04	—	—	l	l	¤		Communication circuit error between indoor/outdoor	Indoor

Procedure	Description
	When pushing the SET and TEST buttons simultaneously for 4 seconds
	or more, the display similar to the one shown in the figure to the right
	will appear.		CODE No.
1	If [Service Check] is displayed, the fault code will be stored in the
		UNIT No.
	error history mode.
		R.C. No.

•01 (Order of error history) is displayed in CODE No. window.

•Check Code is displayed in the CHECK window.

•The indoor unit address, where the fault has occurred will be displayed in the UNIT No. window.

When pushing the TEMP. buttons, the error history stored within the memory will be displayed in chronological order.

2	The numbers displayed within the CODE No. window can vary between 1 and 4. 1 being the most recent fault
	and 4 being the oldest.
	CAUTION
	Do not push the CL button as this will erase all of the error history for that indoor unit.
3	After confirmation, push the TEST button. This will return the display back to its original mode.

						(Detected at indoor side)
E06	E06	No. of indoor units in which sensor has	l	l	¤	Decrease of No. of indoor units	I/F
		been normally received
—	E07	—	l	l	¤	Communication circuit error between indoor/outdoor	I/F
						(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
E12	E12	01: Indoor/Outdoor communication	¤ l		l	Automatic address start error	I/F
		02: Communication between 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 address	I/F
		02: Indoor of other line connected
E23	E23	—	l	l	¤	Sending error in communication between outdoor units	I/F
E25	E25	—	l	l	¤	Duplicated follower outdoor addresses	I/F
E26	E26	No. of outdoor units which received signal	l	l	¤	Decrease of No. of connected outdoor units	I/F
		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

E31 E31 04: Fan IPDU error l l ¤ IPDU communication error I/F

05:IPDU + Fan IPDU error

06:IPDU2 + Fan IPDU error

07:All IPDU error