Mitsubishi Electric MS-A18WV Service Manual page 18

Table 1
No. 1 unit
No. 2 unit
No. 3 unit
No. 4 unit
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.
9-3. 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 CON-
TROL" mode before power failure, the operation is not memorized. In "I FEEL CONTROL" mode, the operation is decided
by the initial room temperature.
How to release "AUTO RESTART FUNCTION"
1
Turn off the main power for the unit.
2
Pull out the electronic control P.C. board, the receiver P.C.
board and the display P.C.board. (Refer to page 27.)
3
Solder jumper wire to the RESISTOR JR07 on the indoor
electronic control P.C. board. (Refer to page 26.)
Operation
1
If the main power (230V AC) has been cut, the operation settings remain.
2
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.)
NOTE
•
The operation settings are memorized when 10 seconds have passed after the remote controller was operated with the
remote controller.
•
If main power is turned off or a power failure occurs 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 work as the
power button of the remote controller is off.
•
To prevent breaker off due to the rush of starting current, systematize other home appliances 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.
1 unit operation
No modification
–
–
–
2 units operation
Same as at left
Solder J1
–
–
CN201
18
3 units operation
Same as at left
Same as at left
Solder J2
– Solder both J1 and J2
C11
TAB12
IC101
IC152
JR07
4 units operation
Same as at left
Same as at left
Same as at left