Toshiba MMU-AP0091H service manual 140

Check code Check code name Cause of operation

[E08] / [96] Duplicated indoor addresses Indoor addresses are duplicated.

(TCC-L / AI-NET)

Sub-code:Duplicated indoor address

Using a main remote controller (RBC-AMT21E), check the setup item codes (DN code) 12, 13, and 14. When there is no address duplication, check to the following flowchart.

Check code Check code name Cause of operation

[E12] / [42]	Automatic address start error	1.	When indoor automatic address started,
(TCC-L / AI-NET)			other refrigerant circuit system was setting
			automatic address. (Sub code : 01)
		2.	When outdoor automatic address started,
			the indoor automatic address was being
			set. (Sub-code: 02)

Sub-code:01: Communication between indoor and outdoor 02: Communication between outdoor units

Is cable connection to

communication line normal?

YES

Is communication line connected

to the different outdoor unit?

NO

NO

YES

Correct cable connection.

Are U1, U2, U3, and U4 connectors connected?

YES

Disconnect relay connector

of U1, U2, U3, and U4.

NO

Turn on power of

outdoor unit again.

Set up address again.

(Refer to “Address setup procedure”.)

Is indoor unit quantity connected

to outdoor unit correct?

NO

Correct communication line.

Check code Check code name Cause of operation

YES

Set up indoor address again.

140

[E15] / [42]	No corresponding indoor unit	1. Communication line connection error
(TCC-L / AI-NET)	during automatic address		between indoor and outdoor.
		2.	Indoor power system error
		3.	Noise from surrounding devices
		4.	Power failure
		5.	Indoor P.C. board error

Check code	Check code name		Cause of operation
[E09] / [99]	Duplicated master		Setup of master remote controller is dupli-
(TCC-L / AI-NET)	remote controller		cated.
Are two remote controllers set up	YES
		Correct setup of remote controllers one as a master, and
as two master remote controllers?		the other as sub (remote controller address connector).
NO

Is communication line between indoor and outdoor normal?

YES

Is connection of CN40 connector

on indoor P.C. board correct?

YES

NO

NO

Correct communication line.

Correct connection.

Check remote controller P.C. board.

Failure ÆReplace

Check code Check code name Cause of operation

[E10] / [CF]		Communication error		Indoor P.C. board error failure
(TCC-L / AI-NET)		in indoor P.C. board assembly
Is there any fault on power line?			YES	Check power voltage on line.
				Eliminate noise, etc.
	NO
				Check indoor control P.C. board.
				Failure ÆReplace

Is connection of CN01

connector on I/F P.C. board of header outdoor unit correct?

YES

Is there any connection error of power cable?

NO

Did a power failure occur?

NO

Is there a noise source?

NO

Set up address again

after resetting power supply.

NO

YES

YES

YES

Correct connection.

Correct power cable.

Set up address again after

resetting power supply.

Eliminate noise.