Connection Of External Input Cable; Circuit Board Setting - Fujitsu UTY-TERX Installation Manual

Case 2: For polar 3 wire
Modify the cable as per below methods.
Use a tool to cut off the terminal on the end of the remote controller
cable, and then remove the insulation from the cut end of the cable as
shown in Fig. 1.
Connect the remote controller cable and connecting cable as shown in
Fig. 2.
Be sure to insulate the connection between the cables.
Fig. 1
Fig. 1
White
Remote
Red
controller cable
White
Red
Black
Connect the remote controller cable to the connecting cable, and insert it
to the connector.
Connecting cable
Connector
Remote controller cable
When the board has the 2WIRE/3WIRE DIP switch on it, set it to
3WIRE.
For how to set, see "Case 1: For non-polar 2 wire".
When connecting to the exclusive terminal block
(2)
Connect the end of remote controller cable directly to the exclusive
terminal block.
If there is the 2WIRE/3WIRE switch on the PC board of the indoor unit,
set it to match the connection method of the connected remote control-
ler cable.
Example) Connection of non-polar 2 wire
Terminal block
Functional earthing
(If necessary)
Remote controller
cable
* Layout of terminal block and
PC board is varies, depending
on the type of indoor unit.

8. CONNECTION OF EXTERNAL INPUT CABLE

When the switch is connected.
Switch
This product
Select low current use contacts (usable at DC5V, DC2mA or less).
Short circuit detection resistance (R ON): ≤ 500 (Ω).
Open circuit detection resistance (R OFF): ≥ 100 (kΩ).
A twister pair cable 0.33~1.25 mm² (16~22AWG) should be use.
Maximum length of cable is 50m (164 ft).
Fig. 2
Fig. 2
Connector
Black
Insulated con-
nection
Connecting
cable
Indoor unit
PCB PCB
Terminal block
to outdoor unit /
power supply
Indoor unit
PC board
Set to "2WIRE" the
DIP switch (SW1)
Switch

9. CIRCUIT BOARD SETTING

The circuit board has a rotary switch, DIP switch and LED as shown
below.
(1) About connections
(1-1) 2WIRE/3WIRE settings (SET3)
Remote controller 2WIRE/3WIRE switching SW
"Default: 2WIRE"
Set matched with the connection method of the remote controller cable to be connected.
(1-2) Master settings (SET 2-1 When setting the SET3 to 3WIRE)
DIP SW OFF
SET 2-1 Master
Enabled only when setting the SET3 to 3WIRE
Set when using with a remote controller or other external switch controller.
When using with a remote controller, set the remote controller to "
and the external switch controller to "
When using two external switch controllers, set one to "
one to " Slave ."
(1-3) Response speed setting (SET 2-2)
DIP SW OFF
SET 2-2 Instant  (200ms)
Set the time for the signal to be output from the controller after changing the
external switch.
(2) About external switch controller operating prohibition
(2-1) Remote controller prohibition setting (SET 2-3)
DIP SW OFF
Remote controller prohibition
SET 2-3
ineffective
If there is a prohibition from the central control unit, this setting determines
whether or not there is a prohibition for the external switch controller operation.
(2-2)
Operation condition setting (
DIP SW OFF
SET 2-4 Unconditional
Determines whether or not operation of the indoor unit is set as an operation
condition for the external switch controller.
ON
Indoor unit
OFF
Operation condition: when indoor unit operating only
ON
CH1
OFF
×
Output from "Remote controller prohibition all operation" is generated
regardless the operation condition setting.
 ON
Slave
(: Factory setting)
Master
".
Slave
Master " and the other
 ON
Delay  (1min)
(: Factory setting)
 ON
Remote controller prohibition
effective
(: Factory setting)
SET 2-4)
 ON
When indoor unit operating
only
(: Factory setting)
SCENE1
"
En-6