Mitsubishi Electric MXZ-2HA40VF-E1 Service Manual page 38

11-3. 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 "3" on SW1 to ON to enable this function. (MXZ-2HA40VF/2HA50VF)
Set "5" on SW1 to ON the enable this function. (MXZ-3HA50VF)
(3) Turn ON the power supply.
<MXZ-2HA40VF/2HA50VF>
SW1 on the outdoor display P.C. board
SW1
ON
OBH828B
<MXZ-3HA50VF>
SW1 on the outdoor control P.C. board
SW1
ON
5 6
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