E16, E18, E19, Reference | Toshiba MMU-AP0071MH, MMU-AP0181MH

Check code	Check code name		Cause of operation

[E16]	Connected indoor units	1.	There are 48 or more connected indoor units.
	capacity over	2.	Capacity over of total connected indoor units.
		3.	Incorrect setup of indoor/outdoor capacity

Auxiliary code : 00 : Capacity over 01 : ~ : Number of connected indoor units

Check code		Check code name			Cause of operation

[E18]	Communication error between			Regular communication between indoor header
	indoor header and follower			and follower is unavailable.

Are remote controller			NO
			NO		Correct remote controller
					Correct remote controller
inter-unit wires (A/B) normal?					inter-unit wire.

YES

Is backup operation of outdoor unit being set up?

	NO
		NO
Is No. of connected indoor units correct?		NO


	YES
	YES
		NO
Is setup of indoor unit HP correct?		NO


	YES
	YES
		NO
Is total capacity of connected		NO
Is total capacity of connected
indoor units within 135%? ( 1)
	YES

Perform setup of no detection

for capacity over.

Excessive indoor units are connected.

Correct miswiring.

Correct HP setup.

Set capacity of connected

indoor units within 135% of outdoor units.

Is there any disconnection of

connector or wiring from terminal block

of indoor unit?

Is a group control operation?

YES

Are powers of

all indoor units turned on?

YES

Check indoor address.

YES

Correct connection of connector.

Check circuit wire.

Check power connection status

of indoor unit.

Check indoor P.C. board.

Failure Replace

For a service P.C. board, check outdoor HP setup.		OK
(Set up jumper 9, 10, 11, and 12.)
	NG
	NG

Check outdoor interface P.C. board A’ssy.

Set up outdoor HP.

(Refer “How to exchange interface P.C. board”.)

(∗ 1) When capacity of the outdoor unit is 12HP, up to the maximum capacity 120% of indoor units can be connected.

Correct indoor address.

	Check code			Check code name			Cause of operation

	[E19]		Header outdoor units quantity error				1. Misconnection of inter-unit cable between
							indoor and outdoor
							2. Outdoor I/F P.C. board error

Auxiliary code : 00: No header unit				02: Two or more header units
Are not communication lines (U1, U2)					YES
Are not communication lines (U1, U2)					YES		Connect communication line between indoor
between indoor and outdoor connected							Connect communication line between indoor
between indoor and outdoor connected							and outdoor to one unit per 1 system.
	to multiple outdoor units?						and outdoor to one unit per 1 system.
	to multiple outdoor units?
		NO
		NO
					NO

Is communication line between indoor and							Connect communication line between indoor
Is communication line between indoor and							Connect communication line between indoor
outdoor connected to one unit per 1 system?							and outdoor.
		YES
		YES
						Reference)

	Check I/F board.
						When the power supply of the outdoor unit is firstly
						When the power supply of the outdoor unit is firstly
						turned on, the check code [E19 00] is displayed until the
						power supplies of the indoor units are turned on. However
						it is not an error. If the power supplies of the indoor units
						are turned on, the check code is automatically reset.

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

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[E16]

capacity over

[E18]

indoor header and follower

[E19]

Header outdoor units quantity error

Reference)

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