Mitsubishi Electric MS-09SN-C1 Service Manual page 33

9-3. AUTO RESTART FUNCTION
When the indoor unit is controlled with the remote controller, the operation mode, the 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 the
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.
How to set "AUTO RESTART FUNCTION"
1
Turn off the main power for the unit.
2
Pull out the indoor electronic control P.C. board and the display P.C.board. (Refer to page 42 or 44.)
3
Cut the RESISTOR JR07(MS-09/10SN) or JR06(MS-12/15/17/18/24SN) on the indoor electronic control P.C.board.
Operation
1
If the main power (220V 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.)
MS-09/10SN
CN201
52C
NOTE
•
The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the remote
controller.
•
If the 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 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 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.
C11
CN211
IC101
RA102
SW1
JR07
MS-12/15/17/18/24SN
IC141
RA102
IC101
33
(Refer to page 40 or 41.)
CN211
JR06