Mitsubishi Electric NTXMMX A AA Series Service Manual page 12

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 9.0 ft. (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 (Factory setting is normal)
1. Make sure that the breaker for air conditioner is turned OFF.
2. Remove the electrical cover (1) and (2) of the indoor unit.
3. Slide out the electronic control P.C. board, and switch up the slide switch (SW).
4. Put the electronic control P.C. board back to the original position, and install the electrical cover (1) and (2).
NOTE:
• Install the indoor unit at least 7.2 ft. (2.2 m) above floor or grade level.
• Perform static elimination before setting.
Electrical cover (2)
7-5. P.C. BOARD MODIFICATION FOR CHANGING AIRFLOW DIRECTION ADJUSTMENT
The setting when the higher airflow is preferred in the Airflow direction (1)
The angle of airflow direction (1) can be slightly heightened by changing SWV1 to up.
However, it may cause the dirt on the ceiling.
(AUTO) (1) (2)
How to change Dip switch (SWV1) setting (Factory setting is normal)
1. Make sure that the breaker for air conditioner is turned OFF.
2. Remove the electrical cover (1) and (2) of the indoor unit.
3. Slide out the electronic control P.C. board, and change the slide switch (SWV1) to up.
4. Put the electronic control P.C. board back to the original position, and install the electrical cover (1) and (2).
NOTE:
• Perform static elimination before setting.
Electrical cover (2)
OBHT802B
Normal
8.0 ft. (2.4 m) or below
Electronic
control P.C.
board
Electrical cover (1)
(3) (4) (5) (SWING)
Electronic
control P.C.
board
Electrical cover (1)
Increase airflow volume
above 8.0 ft. (2.4 m) and 9.0 ft. (2.7 m) or below
Slide switch SW3
Normal
(Increase airflow
volume)
Slide switch SWV1
Normal Up
(Airflow direction
is heightened .)
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