Mitsubishi Electric M Series Manual page 555

M series
LOCKING THE OPERATION MODE OF THE AIR CONDITIONER (COOL, DRY, HEAT)
• Description of the function:
With this function, you can lock the operation mode of the outdoor
unit. Once the operation mode is locked to either COOL/DRY mode or
HEAT mode, the air conditioner operates in that mode only.
* Initial 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 mak-
ing the setting.
2) Set the 2nd Dip Switch 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 1st Dip
Switch of SW1 on the outdoor controller board to OFF. To lock the op-
eration in HEAT mode, set the same switch to ON.
4) Turn on the main power for the air conditioner.
LOWERING THE OPERATION NOISE OF THE OUTDOOR UNIT
• Description of the function:
With this function, you can lower the operating noise of the outdoor
unit when the operation load is small, for example, during nighttime in
COOL mode. However, please note that the cooling capacity can also
be lowered if this function is activated.
* Initial 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 mak-
ing the setting.
2) Set the 3rd Dip Switch of SW1 on the outdoor controller board to ON
to enable this function.
3) Turn on the main power for the air conditioner.
MULTI SYSTEM Inverter Heat Pump
SW1 Operation mode
COOL
DRY
HEAT
C-553