How To Operate; On/Off; Mode Selection - Mitsubishi Electric PVFY-P12 NAMU-E Operation Manual

3. How to operate

Before starting operation
• The choice of indoor unit operation mode is limited by the operation status of the
outdoor unit to which a given indoor unit is connected. If an outdoor unit and some
of the indoor units that are connected to the outdoor units are already operating in
the cooling mode, for example, only the cooling mode is available for the rest of the
units in the same group. If a different mode is requested, the symbol that corresponds
to the requested mode will blink, notifying the user that the mode is currently
unavailable. The same is true for the heating mode. This restriction, however, does
not apply to the models that support a simultaneous cooling/heating function.

3.1. ON/OFF

Start an operation
1. Press the ON/OFF button
ON/OFF lamp lights up and operation starts.
Stop an operation
1. Press the ON/OFF button again
ON/OFF lamp goes off and operation stops.
• Once the Buttons have been set, pressing of the ON/OFF button only can repeat
the same operation thereafter.
• During operation, the ON/OFF lamp above the ON/OFF button lights up.

3.2. Mode Selection

Pressing the MODE button will change the operation mode in the following order.
*1
COOL FAN
*1: Not all functions are available on all models of indoor units. Functions that are not available will not
appear on the display.
*2: The preset temperature for AUTO (either single or dual set point) mode will appear depending on
the indoor unit model.
AUTO (dual set point) mode:
In AUTO (dual set point) mode, the preset temperatures can be set for cooling and heating, and
operation can be switched automatically between cooling and heating depending on the room
temperature.
The preset temperatures for cooling and heating set in AUTO (dual set point) mode will be reflected
to the temperature setting for COOL and HEAT modes.
During operation in AUTO (dual set point) mode
Preset temp.
(COOL)
Preset temp.
(HEAT)
HEAT
*1, *2 *1
AUTO SETBACK
COOL
• The outdoor units stop when all the indoor units connected to the counterpart
outdoor units stop.
• During heating operation, even if the indoor unit is set to operation while the
outdoor unit is in defrosting operation, operation starts after the defrosting
operation of the outdoor unit has ended.
Caution:
Even if the ON/OFF Button is pressed immediately after the operation is
once stopped, operation is not restarted for about 3 minutes. This function
protects the machine. It automatically starts operation after the lapse of
approximately 3 minutes.
*1
HEAT
The room temperature
changes corresponding
to the change in the
outside temperature.
HEAT
Room
temperature
COOL
5