P26 Tr short-circuit protection error, P29

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

Is power voltage of outdoor unit normal?

	YES
		NO
Is wire connector connection		NO
Is wire connector connection
on IPDU P.C. board normal?
	YES
	YES
		NO
Is compressor normal?		NO


	YES
	YES
		NO
Is smoothing condenser normal?		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
Are connector connection
and wiring normal?
	YES
	YES
		YES
Is not grounded?		YES


	NO
	NO
		YES
Is not winding shorted?		YES
Is not winding shorted?
(Is winding resistance 0.1 to 0.3 ?)
	NO
	NO

YES

Is not winding opened?

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

Compressor error Replace

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.

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

Models: MMU-AP0181MH MMU-AP0071MH MMU-AP0091MH MMU-AP0151MH MMU-AP0121MH

[P26]

G-Tr short-circuit protection error 1.

[P29]

Compressor position

detective circuit error

[P31]

MMU-AP0181MH, MMU-AP0071MH, MMU-AP0091MH, MMU-AP0151MH, MMU-AP0121MH specifications