Mitsubishi Heavy Industries FDTCVA SERIES Technical Manual page 321

Turn switches provided on the back of the PCB.
Switches (SW1-4) provided on the receiver PCB are
for setting the following.
All switched are set to the ON position for shipment.
Prevention of unintended
SW1
movement caused by interference.
Receiver master/slave setting
SW2
SW3 Buzzer valid/invalid
SW4 Cooling only/heat pump switching
When SW1 is turned to the OFF position, change the corresponding
remote controller setting as follows.
Wireless remote controller setting change
Either pressing the "ACL" switch or inserting batteries with the "AIR
FLOW" button depressed will change the mode setting to the radio
interference prevention mode.
(
*When batteries are removed, the setting will be reset to the default setting.
When batteries are removed, please follow the above procedure again.
Please do not forget to explain the abovementioned operation method to the customer.
The operation method is also set out in the instruction manual supplied with the indoor
unit.
3) Attachment of wireless kit
By loosening the panel hanger bolt, create a gap between the panel and the indoor unit.
Lay the wireless kit wiring through the opening.
lace the wiring together with other wiring laid on site into the indoor unit.
Connect the wiring to the terminal block provided in the control box as follows.
X-Red,Y-White, Z-Black.
Attach the wireless kit to the panel according to the panel installation. (Refer to 196 page)
Bundle redundant wiring together with other wiring laid on site.
Note (1) Ensure that wirings are not caught between the receiver and the panel in attaching the receiver.
ON:Normal
OFF:Remote
ON:Master
OFF:Slave
ON:Valid
OFF:Invalid
ON:Heat pump
OFF:Cooling only
320
- -
Default setting
Cover backside
)
Radio interference
prevention mode
Terminal block provided in the
control box of the indoor unit
1 2 /N 3 X Y Z
Red
White
Black