Toshiba MMU-AP0091H service manual 152

Check code Check code name Cause of operation

[L07] / [99]	Group line in individual indoor unit	The group line is connected in the
(TCC-L / AI-NET)		individual indoor unit.

Check code	Check code name	Cause of operation
[L10] / [88]	Outdoor capacity unset	The model selection jumper of the outdoor I/F
(TCC-L / AI-NET)		P.C. board does not match the model.

YES

Is there group wiring?

NO

Check indoor P.C. board.

Failure ÆReplace

Check setup item code

DN 12, 13, and 14 addresses.

YES

Is there an individual indoor unit.

NO

Item code (D1) 12: Line address

Item code (D2) 13: Indoor address

Item code (D3) 14: Group address

Correct indoor group address.

Service I/F P.C. board for the outdoor unit is common to all outdoor units.

The service I/F P.C. board will need to be set up for the correct model based upon the faulty I/F P.C. board, which it is replacing. Set up the model based upon the I/F P.C. board assembly change procedure.

Check code	Check code name	Cause of operation
[L17] / [46]	Inconsistent models of	There are outdoor units on the communication
(TCC-L / AI-NET)	outdoor units	line other than Super Module Multi Flex type
		such as Super Module Multi or Super Module

Check code Check code name Cause of operation

[L08] / [99]* Indoor group / address unset Indoor address unset

(TCC-L / AI-NET)

Multi ice regenerative type

Are the connected outdoor NO

152

Is the power on all the		NO
indoor units turned on?
	YES

Disconnect connectors between

[U1, U2] and [U3, U4].

Clear addresses.

(Refer to “Address clear”.)

Turn on the power of indoor units.

Turn on the power of outdoor unit again.

units those for flex on 1 system?
(Check model name.)
	YES
Is the check code [L17]		NO
displayed even if turning power on
again of all the connected outdoor
units on 1 system alone?
	YES

Replace outdoor units of other models with specified models

Correct communication line between outdoor units.

Re-execute address setup. (Refer to “Address setup”.)

Note) This code is displayed when the power is turned on at the first time after installation. (Because the address is not yet set up)

Check code Check code name Cause of operation

[L09] / [46] Indoor capacity unset Indoor capacity unset

(TCC-L / AI-NET)

Are all the connected			NO	Change the incorrectly built-in outdoor
outdoor I/F P.C. board's on 1 system
				I/F P.C. board's with I/F P.C. board's for
P.C. board's of outdoor units for
				Super Module Multi Flex.
Super Module Multi Flex?
	YES
Check again whether there is any		∗ Using 7-segment on I/F P.C. board, check the model name on each outdoor unit.
other outdoor unit or not on the
communication line in 1 system.			For check, when putting the rotary switch on SW01/02/03=16/16/16, it is an
If any, turn off power of the			outdoor I/F P.C. board, for Super Module Multi Flex if “F” is displayed at the left
corresponding outdoor unit and			side of 7-segment [A] part.
then check once more.

Are capacity setups		YES
of indoor units unset?
	NO

Set up capacity data of indoor unit.

(Setup item code (DN) = 11)

Check indoor P.C. board.

Defect Replace