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Heat exchanger thermistor
(Thl-R2)
Remote controller
PCB power supply
connector
(Primary side)
PCB power supply
connector
(Secondary side)
Fan motorConnector
(CNT)
Louver motor
J31
CNZ
SW10
SW5
SW9
SW7
SW8
SW2
J9
J10
J11
J5
J6
J7
J8
J1
J2
J3
J4
CNE
IC9 IC10
LED1
CNL
C92
CNG
CNY CNJ
CNT
IC8
R62
BZ
L4
C2
CNM
C104
R151
CNW1
IC11
L1
L2
CNH
CNN1
CNB
TB,3
TB,2
TB,1
G
R17
R16
J31
Dip switch
(SW5)
Adress switch
(SW2)
Dip switch
(SW9)
J9~J11
(SW10)
J5~J8
(SW8)
J1~J4(SW7)
Heat exchanger thermistor,
Return air thermistor
(Thl-R1, Thl-A)
Model: FDKN series
This diagram shows the PCB for the 151~251. The component layout on the 301 PCB is different, but the functions are the
same.
Input signal - Reverse invalid
Input signal - Rus stop
Heating thermostat OFF-Lo
Heating thermostat OFF-Stop, Lo
Normal operation operable
Operation permission prohibited
Normal
Heating temp. +3
Louver free stop control - Invalid
Louver free stop control - Effective
Freeze prevention fan control activated.
Freeze prevention fan control deactivated.
Model 151~251
Model 301
J1 (SW7-1)
J2 (SW7-2)
J3 (SW7-3)
J4 (SW7-4)
J5 (SW8-1)
J6 (SW8-2)
J8 (SW8-4)
With
None
(1)
With
None
(1)
With
None
(1)
With
None
(1)
With
None
(1)
With
None
(1)
With
None
(1)
Name Function
Note (1)
(2)
“None” means that jumper wire is not provided on the PCB or the
connection is cut
The replacement board is not equipped with jumpers J1 ~ J8. Instead,
SW7 and 8, with the same functions as jumpers J1~J8, are used in the
position where the jumpers were previously. Set SW7 and 8 locally in
accordance with the above table.
Setting time : 1000hrs. (Unit stop)
Setting time : 1000hrs. (Display)
Setting time : 600hrs. (Display)
Setting time : 180hrs. (when shipped from factory)
SW5-4SW5-3
ON
OFF
ON
OFF
ON
OFF
Switch Function
Custom code - Change
Custom code - Normal
Power failure security - Effective
Power failure security - Invalid
Emergency operation
Normal
Fan control : Powerful mode
Fan control : Mild mode
SW9-1
SW9-2
SW9-3
SW9-4
SW10-1 (J9)
Switch Function
Auto swing fanction - None
Auto swing function - With
Remote controller air flow –
Remote controller air flow 1 speed
Remote controller air flow 2 speed
Remote controller air flow 3 speed
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
ON
OFF
ON
OFF
Switch Function
OFF
ON
Note (1) It is normally ON only in the case of SW9-4.
SW10-3
(J11)
SW10-2
(J10)
● Control change switch (SW5, SW9, SW10)
Function of DIP switch SW5 (Usually all turned OFF)
Function of DIP switch SW9 (Usually all turned OFF)
● Change by the jumper wire
Function of DIP switch SW10 (Usually all turned OFF)