Mitsubishi Electric MXZ-3F54VF Para El Instalador página 11

4-4. LOCKING THE OPERATION MODE OF THE AIR CONDITIONER (COOL, DRY, HEAT)
• Description of the function:
With this function, once the operation mode is locked to either COOL/DRY mode
or HEAT mode, the air conditioner operates in that mode only.
* Changing the setting is required to activate this function. Please explain about
this function to your customers and ask them whether they want to use it.
[How to lock the operation mode]
1) Be sure to turn off the main power for the air conditioner before making the
setting.
2) Set the "3" of SW1 on the outdoor controller board to ON to enable this function.
3) To lock the operation mode in COOL/DRY mode, set the "4" of SW1 on the
outdoor controller board to OFF. To lock the operation in HEAT mode, set the
same switch to ON.
4) Turn on the main power for the air conditioner.
4-5. HOW TO SET LOW STANDBY POWER MODE
• Before turning on the breaker, settings for dip switch (SW1) and jumper con-
nector (SC751) are necessary on the outdoor controller board.
• When connecting the ducted type indoor unit, deactivate low standby power
mode.
To activate low standby power mode:
Connect SC751 to CN750.
Set the 2 of SW1 to ON.
To deactivate low standby power mode:
Connect SC751 to CN751.
Set the 2 of SW1 to OFF.
Note:
• Units come with low standby power mode activated as factory setting.
• When connecting the ducted type indoor unit, outdoor unit will not work with low
standby power mode activated.
• In the event that SC751 is missing, outdoor unit will not work.
SC751 SW1
ON
CN750
1 2 3 4 5 6
ON
CN751
1 2 3 4 5 6
4-6. LOWERING THE OPERATION NOISE OF THE OUTDOOR UNIT
• Description of the function:
With this function, the operating noise of the outdoor unit can be lowered by reducing the operation load, for example, during nighttime in COOL mode.
However, please note that the cooling and heating capacity may lower if this function is activated.
* Changing the setting is required to activate this function. Please explain about this function to your customers and ask them whether they want to use it.
[How to lower the operating noise]
1) Be sure to turn off the main power for the air conditioner before making the setting.
2) Set the "5" of SW1 on the outdoor controller board to ON to enable this function.
3) Turn on the main power for the air conditioner.
CN750
CN751
MODE
Activated
Deactivated
LED
SW1
SW871
SW1
ON
SW2
1 2 3 4 5 6
COOL/DRY
SC751
Lower the operating noise
SW1
ON
1 2 3 4 5 6
HEAT
SW871
SW1
ON
1 2 3 4 5 6
SW2
ON
1 2 3 4 5 6
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