Mitsubishi Heavy Industries MHI FDU71VNXVF1 Technical Manual page 278

(i) Control PCB
Replace and set up the PCB according to this instruction.
1) Set to an appropriate address and function using switch on PCB.
Select the same setting with the removed PCB.
item
Address
Test run
2) Set to an appropriate capacity using the model selector switch(SW6).
Select the same capacity with the PCB removed from the unit.
SW6 -1 -2 -3 -4
100V
－
〇 〇 〇
125V
－ －
〇 〇
140V
－
〇 〇 〇
3) Replace the PCB
a) Exchange PCB after detaching all connectors connected with the PCB.
b) Fix the PCB so as not to pitch the wiring.
c) Connect connectors to the PCB. Match the wiring connector to the connector color on the PCB and connect it.
4) Control PCB
Parts mounting are different by the kind of PCB.
SW2(Blue)
Address setting
CNE(White）
RAM checker
SW6
Capacity setting
SW7
Function setting
SW8
Function setting
CNN(Yellow）
Thermistor
(Heat exchanger)
CNH(Black）
Thermistor
(Return air)
switch Content of control
SW2 Plural indoor units control by 1 remote control
－
SW7-1
Operation check/drain motor test run
〇
〇:ON －:OFF
SW6
ON
1 2 3 4
Example setting for 140V
CNZ(White）
CNJ(White）
Louver motor
CNTA(Blue） CNC(Red）
CNI(Blue）
External Humidity
Float SW
input sensor
Normal
CNT（Blue） CNV（Red）
HA External switch Auto lift
CNO(Red）
Heater
output
277
- -
'12 • PAC-T-178
PSB012D990B
CNV2(Black) CNB(White）
Auto clean Remote
panel control
c
CNR(White）
Drain motor
CNW2(White）
Power PWB
Part number