Fujitsu UTY-TFSXJ3 Manual

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This product is a WLAN adapter to connect an air conditioner to the following web
service.
• AIRSTAGE Mobile (For residential use)
You can operate air conditioners with your smartphone.
* Downloading the mobile app “AIRSTAGE Mobile“ is required.
SETTING MANUAL (full)
With installation instructions
(For authorized service personnel only)
PART No. 9382758103-02
[Original instructions]
Wireless LAN adapter for air conditioner
Before using this product, read these instructions thoroughly.
Contents
1. SAFETY PRECAUTIONS.............................................................................................3
2. USAGE PRECAUTIONS ..............................................................................................4
3. WIRELESS LAN USAGE PRECAUTIONS ..................................................................5
3.1. Radio Wave Usage Precautions.........................................................................5
3.2. Personal Information (Security-related) Usage Precautions.............................6
3.3. Others .................................................................................................................6
4. INITIALIZATION (RESET)............................................................................................7
5. OPERATION TIPS........................................................................................................8
6. SPECIFICATIONS.........................................................................................................8
7. TROUBLESHOOTING..................................................................................................9
8. WLAN ADAPTER SETTINGS (detailed procedure)
* for authorized service personnel only....................................................................12
8.1. Before installing the WLAN adapter ...................................................................12
8.2. Installation work..................................................................................................15
UTY-TFSXJ3 (AP-WJ3E)
UTY-TFSXJ4 (AP-WJ4E)

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Name of Parts
MAC: 
SSID: AP-WJ /
PIN: 
E-

Wireless LAN label
(attached on the side of the adapter) LED 1
(green)
WLAN adapter
*1) Take off the adapter information label before the installation.
Accessories
The following installation accessories are supplied.
Name and Shape Qty Name and Shape Qty
Setting manual
(simple) 1
WLAN adapter
with cable 1
“ONLINE MANUALS and
WEB APP” sheet 1
Self-tapping
screw
(M4, 25 mm)
2
Adapter information label
(attached to the WLAN
adapter with tape)
1
EMI core*2
1
*2) It may not be used depending on the air conditioner. For details on the usage in the
installation procedure, refer to the indoor unit installation manual.
NOTE
• The wireless LAN label attached to the WLAN adapter is necessary for wireless LAN
setup.
LED 2
(orange)
Setting button
Adapter information label*
1
(attached to the WLAN adapter with tape)

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1. SAFETY PRECAUTIONS
¡To prevent personal injury or property damage, read this section carefully before you
use this product, and be sure to comply with the following safety precautions.
¡Incorrect operation due to failure to follow the instructions may cause harm or damage,
the seriousness of which is classied as follows:
WARNING This mark indicates procedures which, if improperly performed,
might lead to the death or serious injury of the user.
CAUTION
This mark indicates procedures which, if improperly performed,
might possibly result in personal harm to the user or damage to
property.
This mark denotes an action
that is PROHIBITED.
This mark denotes an action that
is C O M PULSORY.
WARNING
• This product contains no user-serviceable parts. Always consult authorized ser-
vice personnel for repairing, installation, or relocation of this product. Improper
handling will cause electric shock or re.
• In the event of a malfunction such as burning smell, immediately stop the opera-
tion of the air conditioner and disconnect all the power supply by turning o󰀨 the
electrical breaker or disconnecting the power plug. Then consult authorized
service personnel.
• Do not repair, disassemble, or remodel this product.
• Do not get this product wet or use it in locations with lots of moisture.
• Do not operate with wet hands.
• Do not install this product in locations where the use of wireless equipment is
prohibited (e.g. hospitals).
• Do not use this product near persons with a pacemaker or similar devices.
• Do not use this product near automatic control equipment (e.g. automatic doors
and re alarms).
CAUTION
• Disconnect all the power supply when you are not using this product for extend-
ed periods.
• Do not press the buttons of this product any more strongly than is necessary.

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2. USAGE PRECAUTIONS
zWhen you use this product, it becomes possible to operate the air conditioner from
locations where you cannot see it directly. This means that people in the room may be
exposed to the unintended operation of the air conditioner. Check the condition of the
room before using this product.
xBe sure to check regularly that the power supply to the air conditioner is se-
curely connected and that dust has not built up in the surrounding area.
It may cause heating or re.
xBe sure to check in advance that there are no malfunctions of the air condition-
er.
xMake sure that the airow from the air conditioner will not cause any adverse ef-
fects.
Objects may fall down causing personal injury, re, or damage to property.
xIf you know that there are people in the vicinity of the air conditioner, inform
them in advance that you will operate it from a distant location.
Sudden operation of the air conditioner may surprise a person and cause the person
to fall down or tumble if the person is on a step, ladder, etc. Furthermore, rapid chang-
es in the room temperature may cause deterioration in a person’s physical condition.
Do not use this product when there are people in the room who are not able to control
the temperature by themselves (For example, infants, children, those with physical
disabilities, elderly, or sick persons.).
xFully understand the reserved timer settings and other operations before using
this product.
Unexpected operation of the air conditioner may cause deterioration in a person’s
physical condition or an adverse e󰀨ect on animals or plants.
xFrequently check the settings and operating situation of the air conditioner
when using this product from a distant location.
Rapid changes in the room temperature may cause deterioration in a person’s physi-
cal condition or an adverse e󰀨ect on animals or plants.
zIf you operate the air conditioner from this product, the indicator lamps and reception
sounds of the air conditioner do not work.
zIf there is bad reception between this product and the access point, adjusting the access
point position or direction of the antenna may improve the reception. It may also be pos-
sible to improve reception by moving the access point closer to this product or using a
wireless LAN repeater.

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3. WIRELESS LAN USAGE PRECAUTIONS
When you use a wireless LAN, there are precautions that you must follow in relation to
radio waves, personal information, and so on. To use this product correctly, be sure to
read the following precautions and the operation manual of the wireless LAN equipment
you are using. We will assume no responsibility, unless legal liability is recognized, in re-
gards to failures, other defects, and damages incurred by use of this product that occurs
through incorrect use or during use by yourself or a third party.
3.1. Radio Wave Usage Precautions
CAUTION
Changes or modifications not expressly approved by the party responsible for compli-
ance could void the user’s authority to operate the equipment.
This transmitter must not be co-located or operated in conjunction with any other an-
tenna or transmitter.
This equipment complies with FCC/IC radiation exposure limits set forth for an uncon-
trolled environment and meets the FCC radio frequency (RF) Exposure Guidelines and
RSS-102 of the IC radio frequency (RF) Exposure rules. This equipment should be in-
stalled and operated keeping the radiator at least 20 cm or more away from a person’s
body. (UTY-TFSXJ3 [AP-WJ3E]/UTY-TFSXJ4 [AP-WJ4E] model conforms to IC [Industry
Canada] standard.)
NOTES
This device complies with Part 15 of FCC Rules and Industry Canada license-exempt
RSS standard(s).
Operation is subject to the following two conditions:
(1) this device may not cause interference, and
(2) this device must accept any interference, including interference that may cause unde-
sired operation of this device.
(UTY-TFSXJ3 [AP-WJ3E]/UTY-TFSXJ4 [AP-WJ4E] model conforms to IC [Industry
Canada] standard.)
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to part 15 of the FCC Rules.
zDo not use this product in the following locations. Using this product in such locations
may cause communications to become unstable or not possible.
xNear wireless communication equipment that uses the same frequency band (2.4
GHz) as this product.
xPlaces where there are magnetic elds from equipment such as microwave ovens, or
static electricity or radio wave interference occurs.
(Radio waves may not reach depending on the environment.)

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3.2. Personal Information (Security-related) Usage Precautions
zThere is a possibility of interception if you use wireless LAN equipment due to the use of
radio waves regardless of whether you use encryption or not.
zWireless LAN uses radio waves to exchange information between this product and the
access point. This means it has the advantage of freely being able to make a LAN con-
nection if within reach of radio waves. On the other hand, if the radio waves are within a
certain range, they will reach all locations beyond obstacles (e.g., walls). Therefore, it is
possible your communications may be intercepted and read or illegally intruded upon.
zDo not connect to equipment and networks which you are not authorized to use when
setting up your wireless connection.
zInitialize the settings of this product when disposing of it or transferring it to a third party.
3.3. Others
zUse this product as regular wireless LAN equipment.
xDo not use this product in hospitals or in/near locations with medical equipment.
xDo not use this product within an aircraft.
xDo not use this product near electronic equipment that handles high-precision con-
trol or weak signals.
Examples of electronic equipment to be careful of:
Hearing aids, pacemakers, re alarms, automatic doors, and other automatic control
equipment
zThis is not a guarantee of wireless connection and performance with all access points
and in all residential environments. Radio waves may not reach or may be interrupted
in the following situations.
xUse in buildings made from concrete, rebars, or metal
xInstallation near obstacles
xInterference with wireless communication equipment using the same frequency
xPlaces where there are magnetic elds from equipment such as microwave ovens, or
static electricity or radio wave interference occurs
zInstall and set up this product only after reading the operation manual of the access
point.

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4. INITIALIZATION (RESET)
Initialize (reset) this product in the following situations:
- Changing the access point
- Disposing of this product
- Transferring this product to a third party
1 Unregister the air conditioner from the mobile app.
For details, refer to the operation manual for AIRSTAGE Mobile.
2 Initialize (reset) this WLAN adapter as the following procedure.
*Lighting pattern: O󰀨 On Blinking
(1) Press and hold the Setting button for 12 seconds.
(2) All LED lamps blink 3 times simultaneously (on/o󰀨 at 0.5-second inter-
vals).
Release the Setting button during the blinking.
The initialization is complete, and LED 1 blinks. (on/o󰀨 = 2 s/0.5 s)
After 10 seconds, the LED1 turns on (stop blinking).
LED1: On
LED2: O󰀨
■To continue to use
If you or a third party wishes to continue the use of this product, connect this product to
another access point.
NOTE
• If you initialize the WLAN adapter, the information saved in the WLAN adapter is de-
leted.
Setting button

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5. OPERATION TIPS
zTo operate the air conditioner, refer to the operation manual for AIRSTAGE Mobile.
zThe settings from the mobile app are not reected in the wireless remote controller.
zYou cannot operate and monitor the air conditioner from the mobile app while the power
supply of the air conditioner is disconnected (via breaker or plug).
zThe room temperature is displayed on the mobile app. However, the displayed room
temperature may not be correct depending on the situation in the room or the air condi-
tioner’s operating status. Use this only as a reference.
zIf the settings from the mobile app and the remote controller di󰀨er, the air conditioner
follows the latest operation.
zIf the timer settings are done from the mobile app and the wireless or wired remote
controller, both timer settings become active.
6. SPECIFICATIONS
Wireless LAN-compatible standard IEEE802.11b/g/n
Frequency bands
2.4GHz
(in the U.S. or Canada: 1ch~11ch)
(in the other regions: 1ch~13ch)
Maximum radio-frequency power 40mW
Wireless LAN security
Open
WEP
WPA (PSK)
WPA2_Personal (PSK)
WPS for same-LAN Registration
Operating temperature 0 - 46 °C (32 - 114 °F)
This product includes Open Source Softwares (OSS). To check the included OSS and its
licenses, access the following URL.
www.fujitsu-general.com/data/oss/gen3wla/index.html
<For users in EU member states>
For the full text of the following EU declaration of conformity, refer to the following web-
site.
www.fujitsu-general.com/global/support/
SIMPLIFIED EU DECLARATION OF CONFORMITY
The simplified EU declaration of conformity referred to in Article 10 (9) shall be pro-
vided as follows: Hereby, FUJITSU GENERAL LIMITED declares that the radio equip-
ment type UTY-TFSXJ3 (AP-WJ3E)/UTY-TFSXJ4 (AP-WJ4E) complies with Directive
2014/53/EU.

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7. TROUBLESHOOTING
Check the following items before requesting repairs to this product.
NOTES
• If the problem persists even after performing these checks or diagnostics, consult
authorized service personnel.
Parts/Ele-
ments
Situation Solutions
Downloading
or account
registration
of the mobile
app
I do not know how to down-
load the mobile app
Refer to “8.2. Installation work”.
The mobile app does not
work
Check that the version of the OS on your
smartphone is supported.
Refer to “Items to Check” of “8.2. Installa-
tion work”.
I have not received the e-mail
when registering my account
Set the domain permissions so that it is not
rejected as spam.
Wireless LAN
setup and
initial settings
Wireless LAN setup is not
possible
(The connection settings of
the WLAN adapter and the
access point are not com-
plete)
Conrm that the access point supports
“IEEE802.11b/g/n”.
Conrm that your access point supports
“WPS function” (Button mode).
(Check with the operation manual of the
access point.)
Conrm that the indoor unit is connected to
the power supply.
Conrm that the WLAN adapter of the
indoor unit is on. (The LED of the WLAN
adapter is lit or blinking.)
Check if there was any previous owner us-
ing this wireless LAN control. If there was a
previous owner, contact authorized service
personnel.
I cannot register the WLAN
adapter to the mobile app
Conrm that the LED 1 on the WLAN
adapter is on. If it is blinking or o󰀨, recon-
nect the WLAN adapter and the access
point.

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Parts/Ele-
ments
Situation Solutions
Operations
from the mo-
bile app
I am not able to operate
the air conditioner from the
mobile app
Conrm that the indoor unit is connected to
the power supply.
Conrm that the power to the access point is
on.
Check that your smartphone is not in ight
mode.
Conrm that your smartphone and the
WLAN adapter are connected to the ac-
cess point.
Disconnect the air conditioner from the
power supply, then reconnect it.
Wait for about 15 minutes and try the
operation from the mobile app again.

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State of the Wireless LAN indicators
*Lighting pattern: O󰀨 On Blinking
State of the Lamps Causes and Solutions
All the lamps are o󰀨 The power to the WLAN adapter is not on.
´Check that the power to the air conditioner is
on and that the air conditioner breaker is not
tripped.
LED 2 is o󰀨 or blink-
ing fast (Repeating
0.5 seconds on / 0.5
seconds o󰀨)
The power to the access point is not on.
´Conrm that the power to the access point is
on.
There is a possibility that the WLAN adapter is not
properly connected to the access point.
´Disconnect the power supply to the air con-
ditioner (via breaker or plug), and then re-
connect.
LED 1 is blinking
fast (Repeating 0.5
seconds on / 0.5
seconds o󰀨)
It is not possible to communicate with the air condi-
tioner.
´If the blinking continues for more than a few
minutes, there may be a wiring error in the air
conditioner. Contact authorized service person-
nel.
All the lamps are
blinking fast (Re-
peating 0.5 seconds
on / 0.5 seconds o󰀨)
There is a problem with the WLAN adapter.
´Disconnect the power supply to the air condi-
tioner (via breaker or plug), and then re-con-
nect. Set up the wireless LAN again according
to the operation manual for AIRSTAGE Mobile.

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8. WLAN ADAPTER SETTINGS (detailed procedure)
* for authorized service personnel only
8.1. Before installing the WLAN adapter
WARNING
• For the air conditioner to operate satisfactorily, follow the procedures described in this
manual and the operation manual of the air conditioner.
• Installation work must be performed following the national wiring standards by authorized
personnel only.
CAUTION
• Install the WLAN adapter near the access point. (The connection may become unstable
if it is placed further away, which will make using the system more di󰀩cult.)
• Certain types of wall materials may shut out wireless communications.
• Do not touch the heat exchanger.
• During installation or removal, do not have the wire caught by any parts nor pull it hard.
It may result in a malfunction of the air conditioner.
• Do not bundle the WLAN adapter wiring with the connection cable running between
the indoor and outdoor units, or the power supply cable.
• Install the WLAN adapter between the indoor unit and the access point.
• Do not install the WLAN adapter in the following places, otherwise, radio communica-
tion may be interfered with.
- Places exposed to direct sunlight
- Places subject to extremely high and low temperatures, such as near the outlet port
of the air conditioner main body
- Near the air conditioner air inlet or outlet
- Places with high humidity
- Places near moving parts of the air conditioner main body
- Places near the bottom of the air conditioner main body
- Inside or on the side of the air conditioner main body
- Near microwave ovens
- Within 1 m (40 in) of a TV or radio
- Places in the reach of children
- Near automatic control devices such as automatic door sensors or re detectors
- Places with oil, vapour, or ammable gases
- Near medical equipment, pacemakers, debrillators, or other devices
- Places where the WLAN adapter could get wet, such as in the bathroom
- Places where the WLAN adapter is di󰀩cult to access for maintenance
• Do not lay the WLAN adapter cable or LAN cable on the floor. You may trip on the
cables.
• Install the WLAN adapter in a place where you can operate the switches and buttons
and conrm the indicator lamps. (In the areas shown below.)

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8.1.1 System diagram
One WLAN adapter can be connected to each indoor unit.
CBA
Single connection
Outdoor unit Outdoor unit
Indoor unit Indoor unit Indoor unit
WLAN adapter WLAN adapter WLAN adapter
Multi-split connection
A, B, and C are adapter cables attached to this product.
Prohibited uses:
(1) Group connection of indoor units with wired remote controller
3 wire
3-wire
remote
controller
2-wire
remote
controller
2 wire
Indoor unit Indoor unit Indoor unit Indoor unit
WLAN adapter
WLAN adapter

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(2) Group connection of indoor units
3 wire 2 wire
Indoor unit Indoor unit Indoor unit Indoor unit
(3) Group connection of indoor units
with WLAN adapter cable.
(4) Extended wiring
Extending the cable is prohibited.
Indoor unit Indoor unit
Adapter cable
Junction box
Indoor unit
Junction box
WLAN adapter WLAN adapterWLAN adapter WLAN adapter
WLAN adapter
WLAN adapter

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8.2. Installation work
WARNING
• Disconnect the power supply or turn o󰀨 the breaker before starting work. Failure to
disconnect the power supply may lead to electric shock or re.
• Do not turn on the power until all installation work is complete.
• Use the accessories or specied connection cables.
Do not modify connection cables other than those specied, do not use extension
cords, and do not use independent branch wiring. The allowable current will be ex-
ceeded and cause electric shock or re.
• When installing this product, make sure that there are no children nearby. Otherwise,
injury or electric shock could result.
CAUTION
• Discharge static electricity on your body before starting work. If static electricity is not
discharged, there is a risk that the board parts may be damaged.
• When performing wiring work, be careful not to damage the cable or injure yourself.
Also, connect the connectors securely. Loose connectors will cause trouble, heating,
re, or electric shock.
• Perform wiring so that water does not enter this unit along the external wiring. Always
install a trap to the wiring or take other countermeasures. Otherwise it will cause trou-
ble or electric shock or re.
• Do not touch the circuit board and circuit board parts directly with your hands. Other-
wise, injury or electric shock could result.
This manual indicates the procedure to install and set up the WLAN adapter.
In addition, we provide online content on our website.
Product information page for AIRSTAGE Mobile
This web page instructs the feature of AIRSTAGE Mobile and the URLs for downloading
the mobile app.
www.fujitsu-general.com/global/products/airstagemobile/index.html

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Items to Check
* Prepare the following items before using this product.
Access point
It should support IEEE802.11b/g/n wireless LAN standard
and have a DNS server function.
Set the connection to the access point with WPS to per-
form communications by wireless LAN.
Refer to the operation manual of the access point to
check if it supports these conditions.
* When you use AIRSTAGE Mobile only in Direct Control
mode, the access point is unnecessary.
AIRSTAGE Mobile Be sure to update and keep it the latest version.
Smartphone
Supported OS:
•• Android OSAndroid OS
•• iOSiOS
Check the latest supported OS version
at Google Play or App Store.
“AIRSTAGE Mobile” is a trademark of FUJITSU GENERAL LIMITED.
Android and Google Play are registered trademarks of Google LLC.
App Store is a service mark of Apple Inc., registered in the U.S. and other countries.
IOS is a trademark or registered trademark of Cisco in the U.S. and other countries and is
used under license.

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1 Connect the wire.
For the connection details, refer to the
installation manual for the indoor unit.
Attach the connecter directly to the
printed circuit board (PCB).
NOTE: Options connecting to CN65 can-
not be used at the same time. CN65
WLAN adapter cable
with connector
Indoor unit
2 Install the WLAN adapter.
Install the WLAN adapter in the direction as shown in the
figure.
If the WLAN adapter is installed in the wrong direction,
water may get into the adapter through the wire, causing
failure.
Self-tapping
screws
(accessory)
GOOD PROHIBITED
Reverse direction On the oor On a curved surface
Do not lay the WLAN adapter cable on the floor. You may trip on the cables.
GOOD PROHIBITED
3 Connect the indoor unit to the power supply.
Wait until the LED 1 stops the blinking (LED1: on, LED 2: on).
It takes about 10 seconds.
4 Connect the WLAN adapter and the access point.
Refer to the operation manual of AIRSTAGE Mobile for details.
PCB

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CAN ICES-3 (B)/NMB-3(B)
TRA
REGISTERED No. ER02774/21
DEALER No. DA77717/18