Mitsubishi Heavy Industries SCM71ZM-S1 Technical Manual page 234

(iv) FDUM series
1) Control PCB
Replace and set up the PCB according to this instruction.
a) Set to an appropriate address and function using switch on PCB.
Select the same setting with the removed PCB.
item
Address
Test run
b) 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
50VF
ON OFF ON OFF
c) Replace the PCB
i) Exchange PCB after detaching all connectors connected with the PCB.
ii) Fix the PCB so as not to pitch the wiring.
iii) Connect connectors to the PCB. Match the wiring connector to the connector color on the PCB and connect it.
d) 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
OFF
SW7-1
ON Operation check/drain motor test run
SW6
-4
ON
1 2 3 4
CNZ(White）
CNTA(Blue）
CNI(Blue）
External
Float SW
input
Normal
CNT（Blue）
HA External switch
233
- -
'17 • SCM-T-225
PSB012D990B
D
CNR(White）
Drain motor
CNW2(White）
Power PCB
Part number
CNB(White）
Remote
control