E06 Decreased number of indoor units, E07

Check code	Check code name	Cause of operation

[E06]	Decreased number of indoor units 1.	Communication lines (U1, U2) connection
		error between indoor and outdoor
	2.	Connector connection error of communica-
		tion for indoor P.C. board
	3.	Connector connection error of communica-
		tion for outdoor I/F board

Check code	Check code name		Cause of operation

[E07]	Indoor/Outdoor	1.	Indoor/outdoor communication end terminal
	communication circuit error		resistance setup error
	(Detected at outdoor side)	2.	Indoor/outdoor communication connection
			error

4. Power supply of indoor unit

(Is power turned on?)

Auxiliary code : No. of indoor units which received signals normally

Is setup of end terminal resistance		NO
of outdoor unit normal?
	YES
	YES
		YES
Is inter-unit cable (U1, U2) between		YES
Is inter-unit cable (U1, U2) between
indoor and outdoor short-circuited?

Correct setup of end terminal resistance.

Is there no miscabling/	YES
disconnection on communication line
disconnection on communication line
betweenindoor and outdoor?

Correct communication line.

	NO
		NO
Is connection of CN40 connector		NO
Is connection of CN40 connector
on indoor P.C. board normal?
	YES
	YES

Correct

communication line.

Is connection of inter-unit wire

between indoor and outdoor correct?

YES

Correct short-circuit.

Is connection of CN01 connector on outdoor I/F P.C. board normal?

YES

Is power of indoor turned on?

YES

Did a power failure occur?

YES

Is there no noise, etc?

Check indoor P.C. board.

Defect Replace

Correct cabling of cable connector.

Turn on power of indoor unit.

Clear the check code.

YES

Check noise, etc, and eliminate it if any.

(NOTE)

1.When signal is not sent for a certain period from the indoor unit which has used to send signals normally, [E06] is displayed.

YES

Correct power wire.

YES

Eliminate noise.

Is there no error on

power wire to outdoor unit?

Is there noise source?

Outdoor I/F P.C. board failure Replace

Is F400 (fuse) on	NO
Is F400 (fuse) on
I/F P.C. board opened?
YES * Check conduction
with tester.

Turn on power to start operation.

I/F P.C. board failure

However an emergent operation is available by inserting connector to be connected to CN01 to CN33.

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

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Toshiba MMU-AP0151MH, MMU-AP0181MH, MMU-AP0091MH E06 Decreased number of indoor units, E07

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

[E06]

Decreased number of indoor units 1.

[E07]

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