Mitsubishi Electric MSH-GE50VB-E1 Service Manual page 12

8-4. MU & MUX TYPE/MUH & MXZ TYPE SWITCH OVER AND AUTO RESTART FUNCTION
1. MU & MUX TYPE/MUH & MXZ TYPE SWITCH OVER
<MSC-GE20VB MSC-GE25VB MSC-GE35VB>
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 switch over MU & MUX TYPE/MUH & MXZ TYPE
(1)
Turn OFF the main power for the unit.
(2)
Pull out the electronic control P.C. board, and change
switch (SW2- ) on the indoor electronic control P.C. board
according to the type of outdoor unit as following figures.
(Refer to 10-6.)
Outdoor unit
MU & MUX type
Set switch upside.
SW2
1 2
AUTO RESTART FUNCTION
2.
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. "AUTO RESTART FUNCTION" automatically starts opera-
tion in the same mode just before the shutoff of the main power. 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.
Operation
If the main power 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.)
How to disable "AUTO RESTART FUNCTION"
MSC-GE20VB
MSC-GE25VB
MSC-GE35VB
(1)
Turn OFF the main power for the unit.
(2)
Pull out the electronic control P.C. board, and change
switch (SW2- ) on the indoor electronic control P.C.
board as following figures. (Refer to 10-6.)
AUTO RESTART
FUNCTION ON
Set switch downside.
SW2
1 2
OBH529A
Outdoor unit
MUH & MXZ type
Set switch downside.
1 2 SW2
AUTO RESTART
FUNCTION OFF
Set switch upside.
SW2
1 2
SW2- sets the AUTO RESTART FUNCTION ON/OFF.
SW2- switches over the MU & MUX type/MUH & MXZ type.
When the units are shipped from the factory, SW2 is as follows.
SW2- : AUTO RESTART FUNCTION ON
SW2- : MUH & MXZ type
F11
LD105
CN202
IC101
<MSC-GE20VB MSC-GE25VB MSC-GE35VB>
NOTE: •
If the indoor-outdoor connecting wire is incorrectly
connected on the terminal block, the unit does not
operate normally.
•
If the earth is incorrect, it may cause an electric
shock.
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L101
FRONT
SW1
SW2