Mitsubishi Electric Mr. SLIM MSZ-FA25VA Technical Manual página 363

7-3. 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
power has restored after power failure. Then, the unit will restart automatically.
Operation
1
If the main power 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.)
How to release "AUTO RESTART FUNCTION"
1
Turn off the main power for the unit.
2
Solder the Jumper wire to JR07 on the indoor electronic control P.C. board. (Refer to 9-7.)
F11
CN111 CN112 CN113
NR11
IC101
R111
C111 T11
7-4. P.C. BOARD MODIFICATION FOR CHANGING AIRFLOW VOLUME
Change dip switch SW3 setting according to the height of ceiling.
Dip switch SW3
Ceiling height
NOTE: When the ceiling is above 2.7 m, airflow volume may be insufficient even with the Dip switch (SW3)
set to "increase airflow.
How to change Dip switch (SW3) setting (Default setting is Normal)
1. Turn OFF the power supply for the air conditioner.
2. Remove electrical cover A and B.
3. Slide out electronic control P.C. board, and switch
up or down Dip switch (SW3).
4. Put electronic control P.C. board back to
the original position, and install electrical cover A and B.
NOTE:
To prevent damage of P.C. board due to static electricity,
make sure to perform static elimination before setting.
CN106
NOTE:
•
The operation settings are memorized when 10 seconds have passed
JR07
after the indoor unit 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 con-
CN151
troller is off.
•
To prevent breaker tripping due to the rush of starting current, systematize
other home appliance not to turn on at the same time.
CN211
•
When some air conditioners are connected to the same supply system, if
they are operated before power failure, the starting current of all the com-
pressors 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.
Normal
2.4 m or below
Electrical
cover B
Increase airflow volume
above 2.4 m and 2.7 m or below
Electrical
cover A
Electronic control P.C. board
Dip switch SW3
Normal
Funciones
Increase
airflow volume
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