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1. MU & MUX TYPE/MUH & MXZ TYPE SWITCH OVER
The indoor units for MU & MUX type and MUH & MXZ type
are common specifications. Set switch according to the
type of outdoor unit. The units are set for
MUH & MXZ type when they are shipped from the factory.
How to set “AUTO RESTART FUNCTION”
!
Turn off the main power for the unit.
@
Pull out the electronic control P.C. board, and change switch(SW2-
1
) on the indoor electronic control P.C. board as
following figures.
SW2-
1
sets the AUTO RESTART FUNCTION ON / OFF.
SW2-
2
switches over the MU &MUX type/ MUH & MXZtype.
When the units are shipped from the factory, SW2 is as follows.
SW2-
1
:
AUTO RESTART FUNCTION OFF
SW2-
2
:
MUH & MXZ type
}
1
2
1 2
SW2
FRONT
IC101
SW2
CN151
SW1
CN1
12
CN121
L101
CN201
F11
TAB12
CN202
C1
1
CN21
1
Operation
!
If the main power (230V AC) has been cut, the operation settings remain.
@
After the power is restored, the unit restarts automatically according to the memory. (However, it takes at least 3
minutes for the compressor to start running.)
12-6. MU & MUXTYPE/MUH & MXZ TYPE SWITCH OVER AND AUTO RESTART FUNCTION
2. AUTO RESTART FUNCTION
When the indoor unit is controlled with the remote controller, the operation mode, set temperature, and the fan speed
are memorized by the indoor electronic control P.C.board. The “AUTO RESTART FUNCTION” sets to work the moment
power has restored after power failure.Then, the unit will restart automatically. However if the unit is operated in “I
FEEL CONTROL” mode before power failure, the operation is not memorized. In “I FEEL CONTROL” mode, the opera-
tion is decided by the initial room temperature. “AUTO RESTART FUNCTION” is OFF when the units are shipped from
the factory.
1 2
1 2
1 2
SW2
SW2
1 2
Outdoor unit
MUH & MXZ type
Set
2
switch
downside.
Outdoor unit
MU & MUX type
Set
2
switch
upside.
NOTE:•
If the indoor-outdoor connecting wire is incorrectly
connected on the terminal block, the unit does not
operate normally.
•
If a ground is incorrect, it may cause an electric shock.
How to switch over MU & MUX TYPE/MUH & MXZ TYPE
!
Turn off the main power for the unit.
@
Pull out the electronic control P.C. board, and change
switch(SW2-
2
) on the indoor electronic control P.C. board
according to the type of outdoor unit as following figures.
1 2
SW2
SW2
1 2
1 2
1 2
AUTO RESTART
FUNCTION OFF
Set
1
switch
upside.
AUTO RESTART
FUNCTION ON
Set
1
switch
downside.
Slide switch
Type
The position
of the slide
switch
COOL ONLY
COOL & HEAT
12-5. REMOTE CONTROLLER (How to set the type)
This remote controller setting needs to be switched according to the type of air conditioner (COOL & HEAT or COOL
ONLY).
If the setting is incorrect, the air conditioner does not operate normally. Therefore, check if the setting corresponds to the
type of air conditioner. If not, correct the setting as shown below.
How to set the remote controller exclusively for particular indoor unit
After you turn the breaker ON, the first remote controller that sends the signal to the indoor unit will be regarded as the
remote controller for the indoor unit.
The indoor unit will only accepts the signal from the remote controller that has been assigned to the indoor unit once they
are set.
The setting will be cancelled if the breaker has turned off, or the power supply has shut down.
Please conduct the above setting once again after the power has restored.
OB307A4.qxp 03.2.19 4:11 PM Page 103
