Mitsubishi Heavy Industries FDT200VSAWPVH Service Manual page 47

(ii) Instruction of how to replace indoor unit control PCB
Read the "SAFETY PRECAUTIONS" carefully first of all and then strictly follow it during the replacement in order to protect yourself.
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
CAUTION Wrong installation might cause serious consequences depending on circumstances.
After completing the replacement, do commissioning to confirm there are no anomaly.
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.
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.
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.
Bundle the cables together so as not to be pinched or be tensioned. It may cause malfunction or electric shock for disconnection or deformation.
1) Model FDT series
a) Replace the control PCB
i) Unscrew terminal (Arrow A) of the "E1" wiring (yellow/green) that is connected to PCB.
ii) Replace the PCB only after all the wirings connected to the connector are removed.
iii) Fix the board such that it will not pinch any of the wires.
iv) Switch setting must be same setting as that of the removed PCB.
v) Reconnect the all wirngs to the PCB, that was removed in ii).
vi) Rescrew the terminal (Arrow A) of the "E1" wiring, that was removed in i).
vii) When there is no wire to connect to CNWR, connect the supplied jumper-connector. (Refer to
Fig.2) If nothing is connected to CNWR, it doesn't work even when power is turned on.
b) Control PCB (※Parts mounting are different by the kind of PCB.)
CNV(White)
CNH(Black)
CNTA(Blue)
LED2
CNL(Black)
(Green)
CNC(White)
CNT2(Red)
CNF(Yellow)
CNN(Yellow)
CNI(Blue)
CNJ1(White)
Reactor
SAFETY PRECAUTIONS
WARNING
CAUTION
CNV2(Black)
CNR(White)
LED3
(Red)
SW7
CNG(Blue)
CNT(Blue)
CNJ2(Grey) CNA (Red)
Equipped with reactor
CNW3(White)
CNQ(Red)
SW2
SW5
SW6
CNB(Black) CNP(Green) CNK2(Black)
Supplied
jumper-connector
Fig.2 Equipped without reactor
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'21 • PAC-SM-383
A
CNW0(White)
CNM1(White)
CNWR(White)
CNK1(White)
Part number
PSC012D050A
F