Fujitsu UTY-XCSX User manual

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INSTALLATION MANUAL

AIR CONDITIONER

OPTIONAL PARTS

External input and output PCB

For authorized service personnel only.

• Hand this manual to the customer to keep for future use,

such as for relocating or repairing the product.

1. SAFETY PRECAUTIONS

WARNING

Indicates a potentially or imminently

hazardous situation which, if not avoided,

could result in death or serious injury.

For the air conditioner to operate satisfactorily, install as

outlined in this installation manual.

Installation work must be performed in accordance with

national wiring standards by authorized personnel only.

Before installation, be sure that all sources of power have

been shut off. There is a danger of electric shock.

Never touch electrical components immediately after the

power supply has been turned off. Electrical shock may

occur. After turning off the power, always wait 5 minutes or

more before touching electrical components.

For installation purposes, be sure to use the parts supplied

by the manufacturer or other prescribed parts. The use of

non-prescribed parts can cause serious accidents such as

the unit falling, water leakage, electric shock, or ﬁre

Discharge static electricity before the installation.

For the PCB and locally purchased parts, apply voltage

indicated on speciﬁcations of parts. Application of

unspeciﬁed voltage may result in failure or malfunction of

air conditioner.

CAUTION

Indicates a potentially hazardous

situation that may result in minor or

moderate injury or damage to property.

Do not pull on the connectors with too much force.

2. ABOUT THE UNIT

2.1. General

• This PCB is an adapter connecting indoor unit control

PC board and local wiring for various controls (Remote

operations, Operation status display, Error status display),

Fan (fresh air) control or External heater control.

2.2. Parts and accessories

• The following installation parts are supplied.

Use them as required.

Name and shape Q’ty Description

Installation manual

This manual

External connection PCB

For various

external input/

output connections

Spacer

4For attaching the

PCB

Spacer

1For attaching the

PCB

Wire with connector

1For connecting the

PCB

EMI core

1* For mounting on

wire

* Use of this item depends on the product. Please refer to the

installation manual of the indoor unit.

PART No. 9380828112

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3. INSTALLATION PROCEDURES

3.1. Connecting the PCB

Description of External input/output PCB

To indoor unit PCB

Connector wire

Rotary switch

SW2

SW1

Fig. External input and output PCB

• Connection depends on the PCB type of the indoor unit.

Refer to the installation manual of the indoor unit for details

on how to connect to the indoor unit PCB.

4. SETTINGS

4.1. Connectable devices

External

input/

output

Terminal

block

Input

select

(SW1)

Input

signal

(SW2)

External

input

Operation/

Stop

Input 1/

Input 2 Dry

contact/

Apply

voltage

Edge/Pulse

Forced

thermostat

off

Input 1 Edge

External

output

Operation

status

Output 1

Output 2

Output 3

––

Error status

Indoor unit

fan

operation

status

External

heater

output

■Input signal type

The input signal type can be selected.

Signal type (edge or pulse) can be switched by the DIP

switch 2 (SW2) on the External input and output PCB.

When SW2 is on the “Edge” side.

When SW2 is on the “Pulse” side.

Edge

Pulse

The width of pulse must be longer than 200 msec.

4.2. External input

• “Operation/Stop” mode or “Forced stop” mode can be

selected with function setting of indoor unit.

• A twisted pair cable (22AWG) should be used. Maximum

length of cable is 150 m.

• The wire connection should be separate from the power

cable line.

●

Input select

Use either one of these types of terminals according to

the application. (Both types of terminals cannot be used

simultaneously.)

• Dry contact

In case of internal power supply, set the slide switch of

SW1 to “NON VOL” side.

Input 1

11

Input 2

Connected unit

PCB

*1: The switches can be used on the following condition:

DC 12 V to 24 V, 1 mA to 15 mA.

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• Apply voltage

In case of external power supply, set the slide switch of

SW1 to “VOL” side.

Input 1

11

Input 2

Connected unit

PCB

Power supply

2

*1: The switches can be used on the following condition:

DC 12 V to 24 V, 1 mA to 15 mA.

*2: Make the power supply DC 12 V to 24 V 10 mA or

more.

4.3. External output

• A twisted pair cable (22AWG) should be used.

• Permissible voltage and current: DC 5 V to 30 V / 3 A, AC

30 V to 250 V / 3 A

• For details, refer to the following chart “Combination of

external input and output”.

(Example)

Power supply

Connected device 1

(Operation status)

Connected device 2

(Error status)

Connected device 3

(Indoor unit fan

operation status)

PCB

Combination of external input and output

By combining the function setting of the indoor unit and rotary switch setting of the External input and output PCB, you can

select various combinations of functions.

To set the function setting, refer to the installation manual of the indoor unit.

For details, please refer to the technical manual.

Combination examples of external input and output are as follows:

Mode Rotary

External input External output

1 2 Signal type 1 2 3

0-1 1 Operation/Stop Not available Edge Operation/Stop Error status Indoor unit fan

operation status

Operation Stop Pulse

0-2 2 Forced

Thermostat OFF Not available Edge Error status Indoor unit fan

operation status

External heater

output

1 to 8 3 to 9, A

Available for USA Market Only

For details regarding the settings, please check the Design & Technical Manual.

9 B Forced

Thermostat OFF Not available Edge Operation/Stop Indoor unit fan

operation status

External heater

output

10 C Forced

Thermostat OFF Not available Edge Operation/Stop Error status External heater

output

11 D Forced

Thermostat OFF Not available Edge Operation/Stop Indoor unit fan

operation status Error status

NOTE: Input of Operation/Stop depends on the setting of function setting 46 of the indoor unit.

00: Operation/Stop mode 1 (R.C. enabled) 02: Forced stop

01: (Setting prohibited) 03: Operation/Stop mode 2* (R.C. disabled)

*: This function might not be available in some units.

Refer to the installation manual of the indoor unit.

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