How To Set Low Standby Power Mode; Lowering The Operating Noise Of The Outdoor Unit; How To Lower The Operating Noise - Mitsubishi Electric MXZ-2F33VF-E1 Service Manual

11-3. HOW TO SET LOW STANDBY POWER MODE

MXZ-3F54VF MXZ-3F68VF MXZ-4F72VF
• Before turning on the power supply, settings for dip switch (SW1) and jumper connector (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
CN750
CN751

11-4. LOWERING THE OPERATING NOISE OF THE OUTDOOR UNIT

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, note that the cooling and heating capacity may lower if this function is activated.
Changing the setting is required to activate this function. Explain about this function to your customers and ask them
whether they want to use it.

[How to lower the operating noise]

(1) Turn OFF the power supply and make sure that the LED goes off.
(2) Set the "3" switch of SW1 to ON to enable this function. (MXZ-2F33VF/2F42VF/2F53VF/2F53VFH)
Set the "5" switch of the SW1 to ON the enable this function. (MXZ-3F53VF/3F68VF/4F72VF)
(3) Turn ON the power supply.
<MXZ-2F33VF/2F42VF/2F53VF/2F53VFH>
SW1 on the outdoor display P.C. board
SW1
ON
OBH790
MODE
Activated
Deactivated
<MXZ-3F53VF/3F68VF/4F72VF>
SW1 on the outdoor control P.C. board
SW1
ON
58
5 6