Toshiba MMU-AP0091H 154, L30 / b6, P03 / 1E, L31 Extended IC error, P01 Indoor fan motor error

Check code Check code name Cause of operation

[L30] / [b6]	Interlock in indoor unit	Outside error was input.
(TCC-L / AI-NET)	from outside

Check code	Check code name		Cause of operation
[P03] / [1E]	Discharge temp TD1 error	1. Service valve of outdoor unit closed.
(TCC-L / AI-NET)		2.	Outdoor PMV1, 2 error
		3.	TD sensor error
		4.	Refrigerant short, clogging in pipe

Is outside device connected		NO
to connector CN80?
	YES
		NO

Does outside device correctly operate?

YES

Check indoor P.C. board.

Failure Replace

Check outside device.

Failure Replace

5.	4-way valve error
6.	SV4 circuit leakage, misinstallation
7.	SV5 circuit leakage
8.	SV6 circuit clogging
9.	Discharge gas/Suction gas pipes mispiping
10. Flow selector unit error

Check cause of the operation.

Check code Check code name Cause of operation

	[L31] / [–]		Extended IC error		1.	Outdoor unit power error
	(TCC-L / AI-NET)				2.	Outdoor I/F P.C. board error
				YES
	Are there any faults with the						Check power voltage and line.
154	outdoor unit power supply?						Check auxiliaty noise, etc.
		NO

Check outdoor I/F P.C. board.

Check code Check code name Cause of operation

[P01] / [11]	Indoor fan motor error	1.	Cabling error
(TCC-L / AI-NET)		2.	Check fan motor.

∗For the models installed with AC fan motor only

Are service valves of

outdoor discharge gas, suction gas,

and liquid pipe fully opened?

YES

Are outdoor PMV1 and PMV2 normal?

1.Connector connection

2.Wiring

3.Coil

4.Valve itself

5.Outdoor P.C. board

YES

Is resistance characteristic

of TD1 sensor normal?

YES

Is there any refrigerant leakage on

discharge gas to suction side on the 4-way valve?

YES

SV4 circuit

1.Are not coils of SV41 and

SV42 valves mounted reversely?

2.Is no leakage from SV41?

YES

Check leakage of SV5 circuit.

Normal

Check clogging of SV6 circuit.

Normal

NO

NO

*Connector CN300, 301 White

NO

*Refer to Outdoor unit temperature sensor characteristics-4.

NO

NO

Abnormal

Abnormal

Open service valves fully.

Repair outdoor PMV.

Replace TD1.

Check 4-way valve.

Correct mounting of valve coils

or replace SV41 valve.

Replace defective parts.

Replace defective parts.

Is there a connection error or		YES
disconnection of CN076 connector?
	NO
		YES

Is not there mechanical lock of fan motor?

NO

Correct cabling circuit for the connector connection.

Replace fan motor.

Check indoor P.C. board.

Failure ÆReplace

Check mispiping of discharge gas /

suction gas main pipes.

Normal

Is the flow selector unit normal?

YES

Is not indoor unit in other refrigerant line connected?

YES

Abnormal

NO

NO

Correct piping.

Repair flow selector unit.

Correct wiring.

Refrigerant short, clogging, pipe breakage (Check there is no pipe breakage, and then recharge refrigerant.)