121
1. MU TYPE / MUH TYPE SWITCH OVER
The indoor units for MU type and MUH type are
common specifications. Set switch according to the
type of outdoor unit.The units are set for MUH 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
follow figures.
1 2
C
111
CN201
C11
CN211
IC152
CN151
SW1
CN1
12
CN121
IC101
C
N
111
CN202
TAB12
SW2
SW2
INDOOR ELECTRIC CONTROL P.C. BOARD
1 2
SW2
1 2
SW2-
1
sets the AUTO RESTART FUNCTION ON / OFF.
SW2-
2
switches over the MU type/ MUH type.
When the units are shipped from the factory, SW2 is as follows.
SW2-
1
:
AUTO RESTART FUNCTION OFF
SW2-
2
:
MUH type
}
Operation
!
If the main power (220/240V 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 min-
utes for the compressor to start running.)
NOTE
•
The operation settings are memorized when 10 seconds have passed after the remote controller was operated.
•
If main power is cut while AUTO START/STOP timer is active ,the timer setting is cancelled.
•
If the unit has been off with the remote controller before power failure, the auto restart function does not works as the
power button of the remote controller is off.
•
To prevent breaker off due to the rush of starting current, systematize other home appliance not to turn on at the same
time.
•
When some air conditioners are connected to the same supply system, if they are operated before power failure, the
starting current of all the compressors may flow simultaneously at restart.
Therefore, the special counter-measures are required to prevent the main voltage-drop or the rush of the starting current
by adding to the system that allows the units to start one by one.
12-5. MU TYPE / MUH 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 operation is
decided by the initial room temperature. “AUTO RESTART FUNCTION” is OFF when the units are shipped from the
factory.
1 2
SW2
1 2
1 2
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 TYPE / MUH 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 follow-
ing figures.
1 2
SW2
1 2
1 2
SW2
1 2
AUTO RESTART
FUNCTION OFF
Set
1
switch
upside.
AUTO RESTART
FUNCTION ON
Set
1
switch
downside.
