Using 1 Remote Controller To Control Multiple Units; Indoor/Outdoor Connection Wire; Display To Remote Controller; Confirmation Of Connected Units - Mitsubishi FDC 6 Series Service Manual

¡ Keeping the louvers horizontal during heating (Only heat pump type)
While HOT KEEP is displayed (during hot start operation or when the thermostat has turned off during heating operation), the
louvers stay in the horizontal position to prevent cold drafts, independent of the setting of the AUTO SWING key (auto swing
or stop). The louver position display of LCD displays continuously the original position before this control operation.
When the HOT KEEP display goes out, both the louvers and the LCD display return to their previous position.
(However, after the power supply to the unit is switched on, the louvers swing two times as a check of the power source
frequency, regardless of the settings of the ON / OFF or AUTO SWING keys).
22) Using 1 remote controller to control multiple units (indoor units - up to 16 units) (Only FDT, FDR, FDU, FDFL models)
a) Function
A single remote control switch can be used for group control of multiple units (indoor units - up to 16 units). All units in the
group that have had the remote control switch set at [Operating Mode] can be turned on and off in order of the unit number.
This functions independently of the thermostat and protection functions of each unit.
Notes (1) The unit number is set by a switch (SW1) on the circuit board for the indoor unit.
Set SW1 : 0~F

Indoor/Outdoor connection wire

indoor unit
(2) If unit number is not important, random can be used. However, setting in order from 0, 1, 2, to F will ensure setting without error.
b)

Display to remote controller

(i) Return air temperature, by remote or center and heating preparation: Displays for the youngest unit for the
remote mode (center mode if there is no remote mode) of the units in operation.
(ii) Inspection and filter sign: Displays either to the first corresponding unit.
c)

Confirmation of connected units

Each push of the inspection switch on the remote control displays the units connected in sequential order from the youngest
unit.
d) Error
(i)
If an error occurs (protection device activation) with some of the units in the group, those units will have an error stop,
but the properly operating units will continue operation.
(ii) Wiring outline
Route the wire connecting each of the indoor and outdoor units as it would be for each unit. Use the terminal block (X,
Y, Z) for the remote control for the group controller and use a jumper wire among each of the rooms.
10
Outdoor unit
0 1 2
0 1 2
Remote controller wire
Remote controller
3 4
Refrigerant piping
3 4
F
F