Parts Layout On The Indoor Unit Pcb; Change By The Jumper Wire; Control Change Switch (Sw5, Sw9, Sw10); Function Of Dip Switch Sw5 (Usually All Turned Off) - Mitsubishi Heavy Industries FDCA Series Technical Manual

Parts layout on the indoor unit PCB

Model: FDT series
To power supply PCB
(501, 601) (CNW9)
Fan motor
(501, 601)
Power supply PCB
(CNW8)
Connector
(CNT)
Address switch
(SW2)
Heat exchanger thermistor,
Return air thermistor
(Thi-R1, Thi-A)
● Change by the jumper wire
Name
With Input signal - Reverse invalid
J1 (SW7-1)
(1)
None Input signal - Run stop
With Heating thermostat OFF-Lo
J2 (SW7-2)
(1)
None Heating thermostat OFF-Stop, Lo
With Normal operation operable
J3 (SW7-3)
(1)
None
Operation permission prohibited
With Normal
J4 (SW7-4)
(1)
None Heating temp. +3
With Louver free stop control - Invalid
J5 (SW8-1)
(1)
None Louver free stop control - Effective
With Freeze prevention fan control activated.
J6 (SW8-2)
(1)
None Freeze prevention fan control deactivated.
Note (1) "None" means that jumper wire is not provided on the PCB or the
connection is cut
(2) The replacement board is not equipped with jumpers J1 ~ J6. Instead,
SW7 and 8, with the same functions as jumpers J1~J6, are used in the
position where the jumpers were previously. Set SW7 and 8 locally in
accordance with the above table.
Fan motor
(151~401)
CNM3
CNW9
52X6 52X1 52X2 52X3
C12
C13
C1
PC5
IC12
L1
IC3
C58
C3
C4
SW2
CNI
CNY
CNH CNN1
Heat exchanger
J9~J11
thermistor
(SW10)
(Thi-R2)
Function
-
C41
CNR
CNV
KN1
52X4
IC8
CNG
IC11
LED2 LED1
SW7
C5
ON
1 2 3 4 J1~J4
SW8 SW9
(SW7)
SW5
SW10
ON
DIP switch
1 2 3 4
(SW9)
J5~J6
(SW8)
DIP switch
(SW5)
● Control change switch (SW5, SW9, SW10)

Function of DIP switch SW5 (Usually all turned OFF)

Switch
ON
SW5-3 SW5-4
OFF
Function of DIP switch SW9 (Usually all turned OFF)
Switch
SW9-3
SW9-4
Note (1) It is normally ON only in the case of SW9-4.
Function of DIP switch SW10 (Usually all turned OFF)
Switch
SW10-1 (J9)
OFF
SW10-2 SW10-3
(J10)
(J11)
ON
130
-
To power supply
(CNW7)
CNW7
L2
C23
TM1
52X8-1
R17
52X7
PC2 PC1
C11
CNB
Remote
controller
Function
Setting time : 1000hrs. (Unit stop)
ON
Setting time : 1000hrs. (Display)
OFF
Setting time : 600hrs. (Display)
ON
Setting time : 180hrs. (when shipped from factory)
OFF
Function
Emergency operation
ON
Normal
OFF
ON Fan control : Powerful mode
OFF Fan control : Mild mode
Function
Auto swing function - None
OFF
ON Auto swing function - With
OFF Remote controller air flow –
ON Remote controller air flow 1 speed
OFF Remote controller air flow 2 speed
Remote controller air flow 3 speed
ON
Louver motor