Mitsubishi Heavy Industries FDUA160AVSAVH Service Manual page 44

(ii) Instruction of how to replace indoor control PCB
Read the "SAFETY PRECAUTIONS" carefully first of all and then strictly follow it during the replacement in order to protect yourself.
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The precautionary items mentioned below are distinguished into two levels, WARNING and CAUTION.
●
Both mentions the important items to protect your health and safety so strictly follow them by any means.
Wrong installation would cause serious consequences such as injuries or death.
WARNING
Wrong installation might cause serious consequences depending on circumstances.
CAUTION
After completing the replacement, do commissioning to confirm there are no anomaly.
●
WARNING
Replacement should be performed by the specialist.
●
If you replace the PCB by yourself, it may lead to serious trouble such as electric shock or fire.
Replace the PCB correctly according to these instructions.
●
Improper replacement may cause electric shock or fire.
Shut off the power before electrical wiring work.
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Replacement during the applying the current would cause the electric shock, unit failure or improper running.
It would cause the damage of connected equipment such as fan motor,etc.
Fasten the wiring to the terminal securely, and hold the cable securely so as not to apply unexpected stress on the terminal.
●
Loose connections or hold could result in abnormal heat generation or fire.
Check the connection of wiring to PCB correctly before turning on the power, after replacement.
●
Defectiveness of replacement may cause electric shock or fire.
CAUTION
In connecting connector onto the PCB, connect not to deform the PCB. It may cause breakage or malfunction.
●
Insert connecter securely, and hook stopper. It may cause fire or improper running.
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Bundle the cables together so as not to be pinched or be tensioned. It may cause malfunction or electric shock for disconnection or deformation.
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Models FDUA160, 200VH
a) Control PCB
Replace and set up the PCB according to this instruction.
i) Set to an appropriate address and function using switch on PCB.
Select the same setting with the removed PCB.
ii) Set to an appropriate capacity using the model selector switch(SW6).
Select the same capacity with the PCB removed from the unit.
SW6
160VH
200VH
iii) Replace the PCB
① Exchange PCB after detaching all connectors connected with the PCB.
② Fix the PCB so as not to pitch the wiring.
③ Connect connectors to the PCB. Match the wiring connector to the connector color on the PCB and connect it.
iv) Control PCB
Parts mounting are different by the kind of PCB.
SW5
Master/Slave
setting
SW2(Blue)
Address setting
CNE(White）
RAM checker
SW6
Capacity setting
SW7
Function setting
SW8
Function setting
CNN(Yellow）
Thermistor
(Heat exchanger)
CNH(Black） CNTA(Blue）
Thermistor
( Return air )
SAFETY PRECAUTIONS
Item Switch
Address SW2 Plural indoor units control by 1 remote control
Test run SW7-1
〇:ON －:OFF
-1 -2 -3 -4
－
〇 〇 〇
－
〇 〇 〇
LED2 CNZ(White）
CNJ(White）
(Green）
Louver motor
CNI(Blue） LED3
External
Float SW
(Red）
input
-
Content of control
Normal
－
Operation check/drain motor test run
〇
SW6
ON
1
Example setting for 200VH
CNT（Blue）
HA External switch
CNG(Blue） CNV2(Black）
Motion sensor Motion sensor
43
-
'21 • PAC-SM-398
PSB012D990B
2 3 4
CNR(White）
Drain motor
CNW2(White）
Power 1 PCB
Part number
CNB(White）
Remote
control
D