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10.3 Instruction of how to replace PCB
(1) Control PCB
(a) FDU, FDUM, FDUT71 series
● 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 abnormalities.
● 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. Start the work after elapsing 1 minutes or more from power off.
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 connector securely, and hook stopper. It may cause fire o r 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.
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
Switch
SW1,2 (Blue)
Address
SW5-2
SW3,4 (Green)
Item
Switch
Superlink
SW5-1
setting
Test run
SW7-1
2) Set to an appropriate capacity using the model selector switches (SW6, 8 and J1).
Select the same setting with the removed PCB.
SW6
Setting
model
-1
-2
-3
15
OFF
OFF
OFF
22
OFF
OFF
OFF
28
ON
OFF
OFF
36
ON
OFF
OFF
ON
45
OFF
OFF
SW6
SW8
ON
ON
1
2
3
4
1
Example setting for 56
SAFETY PRECAUTIONS
Content of control
Indoor unit address : 00-99
OFF
Indoor unit address : under 100
ON
Indoor unit address : 100 or more
Outdoor unit address
Content of control
OFF
Automatic adjustment
Fixed previous version of Superlimk protocol
ON
OFF
Operation check/drain motor test run
ON
SW8
Setting
J1
-4
-1
model
-1
ON OPEN
56
OFF
OFF
71
OFF OPEN
OFF OFF
OFF
90
OFF
OFF OPEN
OFF
112
ON
OFF OPEN
OFF
140
OFF
OFF OPEN
OFF
160
ON
2
3
4
WARNING
CAUTION
Normal
SW8
SW6
J1
-2
-3
-4
-1
OFF OPEN
ON
ON
OFF
OFF OPEN
ON
OFF
OFF OPEN
ON
ON
OFF
OFF OPEN
ON
ON
OFF
OFF OPEN
ON
ON
OFF
－
OFF OPEN
OFF
ON
ON
157
-
-
106
-
-
'21 • KX-T-386
PSB012D991B
PSB012D991B
H
H
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