Toshiba MMU-AP0071MH P26 Tr short-circuit protection error, P29, P31, Compressor position

Check code name Check code name Cause of operation

[P26]	G-Tr short-circuit protection error 1.	Outdoor unit power error
	2.	IPDU error/Cable connection error
	3.	Compressor error
	4.	IPDU P.C. board error

Check code name	Check code name		Cause of operation
[P29]	Compressor position	1)	Cable/connector connection error
	detective circuit error	2)	Compressor error
		3)	IPDU P.C. board error

Auxiliary code : 01: Compressor 1 side 02: Compressor 2 side

Auxiliary code : 01: Compressor 1 side 02: Compressor 2 side

NO

Is power voltage of outdoor unit normal?

	YES
		NO
Is wire connector connection
on IPDU P.C. board normal?
	YES
		NO
Is compressor normal?
	YES
		NO
Is smoothing condenser normal?
(1500µF, 350V)

Correct power line.

Correct connection of wire connector.

Replace compressor.

Check capacity coming-out/

external appearance.

Are connector connection		NO
and wiring normal?
	YES
		YES
Is not grounded?
	NO
		YES
Is not winding shorted?
(Is winding resistance 0.1 to 0.3 ?)
	NO

YES

Is not winding opened?

NO

Check and correct circuit and cables such as cabling to compressor, etc.

Compressor error Replace

Compressor error Replace

Compressor error Replace

88

YES

Replace IPDU P.C. board.

Check IPDU P.C. board.

Failure Replace

Check code name	Check code name	Cause of operation
[P31]	Other indoor error	Other indoor unit in the group is abnormal.
	(Group follower unit error)

When the header unit of the group detected [E03, L03, L07, L08 error], the follower unit of the group displays [P31] error and stops. There are no check code display and alarm record of the main remote controller.