Mitsubishi Electric PXZ-4F75VG Manual De Instalación página 15

4-5. HOW TO SET LOW STANDBY POWER MODE
Use of the low standby power mode is recommended when none of the indoor
units listed in Table 1 or Table 2 is connected to the outdoor unit. The low
standby power mode can be set with the dip switch (SW1) and the jumper con-
nector (SC751).
• Before turning on the breaker at first time, settings for dip switch (SW1) and
jumper connector (SC751) are necessary on the outdoor control P.C. board.
• It is recommended to activate the low standby power mode when none of the
indoor units listed in Table 1 or Table 2 is connected.
Note:
• Units come with low standby power mode deactivated as factory setting.
• When connecting one or more indoor units listed in Table 1 and Table 2, the
outdoor unit does not work at "activated low standby power mode".
• In the event that SC751 is missing, outdoor unit will not work.
• Activate the P.C. board setting by turning ON the breaker.
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.
Table 1: List of the target models
Type Model name
Wall-Mounted MSZ-AP**VF
1way-cassette MLZ-KP**VF
4way-cassette SLZ-M**FA*
PEAD-M**JA(L)*
Ceiling-Concealed
SEZ-M**DA(L)*
Ceiling-Suspended PCA-M**KA*
Floor-Standing SFZ-M**VA*
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.
4-7. SETTING WHEN THE PIPING LENGTH IS LONG
For a system that connects all rooms and has a total piping length of 40 m or more, change the setting to improve the circulation of the refrigerant.
[How to perform the setting]
1) Be sure to turn off the main power of the air conditioner before performing the setting.
2) To enable this function, set SW1 "6" on the outdoor controller board to ON.
3) Turn on the main power of the air conditioner.
CN750
CN751
SC751 SW1 MODE
ON
CN750 Activated
1 2 3 4 5 6
ON
Factory setting
CN751
Deactivated
1 2 3 4 5 6
SC751
Table 2: List of the target models
Type Model name
Cylinder unit E*ST**D-*M2/6/9*D
Hydrobox E*SD-*M2/6/9*D
A DHW tank specified by
DHW tank
MITSUBISHI ELECTRIC
Lower the operating noise
When the piping length is long
SW871
SW1
ON
1 2 3 4 5 6
SW2
ON
1 2 3 4 5 6
en
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