UTY-RNRT UTY-RNRYT5 How to Cancel Unintended TEST MODE Screen at Power-On

GREAT-style Freshdesk support guide for Fujitsu touch-panel wired remote controllers
Key message: The bulletin states this condition is not a product malfunction. Electrical noise from external devices can affect components on the remote controller PC board and cause an unintended TEST_MODE screen to appear at power-on.
SummaryQuick triageAffected modelsCustomer scriptOverview flowCancellation flowIf it returnsInstaller SOPTicket checklist

1. Summary

ItemDetails
BulletinService Bulletin RAC-0116, issued 04 September 2023.
ProductWired Remote Controller (Touch panel).
SubjectTroubleshooting: how to cancel unintended TEST MODE screen at power-on.
What appearsA screen headed TEST_MODE, showing an ID area and software version information such as MAIN / SUB version details.
Cause stated in bulletinElectrical noise from external devices can affect components on the remote controller PC board.
Corrective actionTurn off indoor unit, open the front case, cycle the rear DIP switch OFF then ON, reinstall the case, restore power and confirm TEST_MODE no longer appears.

2. Quick triage

First response triage
Confirm the screen
Ask if it shows TEST_MODE at power-on with ID and software version information.
↓
Confirm controller type
Touch-panel wired remote controller or affected indoor/cassette accessory model.
↓
Normal error code instead?
If it is a standard error code, follow the normal error-code process.
↓
Installer-only work
Opening the controller and cycling the DIP switch is not a customer task.
!Stop
↓
Guide qualified technician
Use the cancellation SOP below.
✓Confirm
Do not replace the controller just because TEST_MODE appeared once. Follow the DIP switch reset first.

3. Affected models

3.1 Wired remote controller optional part models

DestinationTarget models
OceaniaUTY-RNRT
UTY-RNRYT5
North AmericaUTY-RNRUZ2
UTY-RNRUZ4
UTY-RNRUZ5
RXRNRUZ2
RXRNRUZ5
Other destinationsUTY-RNRGZ2
UTY-RNRGZ3
UTY-RNRGZ5
UTY-RNRXZ3
UTY-RNRXZ5
UTY-RNRYZ1
UTY-RNRYZ2
UTY-RNRYZ3
UTY-RNRYZ5

3.2 Wired remote controller supplied as indoor unit accessory

DestinationTarget models
OceaniaARTH24KHTA
ARTH30KHTA
ARTH36KHTA
ARTH45KHTA
ARTH54KHTA
ARTH60KHTA
ARTH60KHTB
ARTH09KLLAP
ARTH12KLLAP
ARTH18KLLAP
ARTH18KMTAP
ARTH24KMTAP
ARTH30KMTAP
ARTH36KMTAP
ARTH45KMTAP
ARTH54KMTAP
ARTH09KSLAP
ARTH12KSLAP
ARTH18KSLAP
EuropeHRG12LHTBP
HRG14LHTBP
HRG18LHTBP
HRG24LHTBP
HRG30LHTBP
HRG36LHTBP
HRG45LHTBP
HRG54LHTBP
RDG12LHTBP
RDG14LHTBP
RDG18LHTBP
RDG24LHTBP
RDG30LHTBP
RDG36LHTBP
RDG45LHTBP
RDG54LHTBP
ARHG12LHTBP
ARHG14LHTBP
ARHG18LHTBP
ARHG24LHTBP
ARHG30LHTBP
ARHG36LHTBP
ARHG45LHTBP
ARHG54LHTBP
ARYG12LHTBP
ARYG14LHTBP
ARYG18LHTBP
ARYG24LHTBP
ARYG30LHTBP
ARYG36LHTBP
ARYG45LHTBP
ARYG54LHTBP

3.3 Wired remote controller supplied as cassette grille accessory

Accessory typeTarget models
Cassette grille accessoryCG-KFA
HUG-KJA
UTG-UKGA-W
UTG-UKTA-W
UTG-UKYA-W

4. Customer-facing explanation

Suggested wording:

The TEST_MODE screen can appear when the touch-panel wired controller is affected by external electrical noise during power-up. The manufacturer bulletin advises this is not a product malfunction. The controller needs to be reset by cycling a DIP switch inside the front case of the controller.

Because the controller needs to be opened, this should be completed by a qualified installer or authorised service person.

5. GREAT-style flowcharts

5.1 Overall decision flow

Unintended TEST_MODE screen - decision flow
Power applied
Controller wakes during power-on.
⏻Power
↓
Does TEST_MODE appear?
Look for TEST_MODE heading, ID and MAIN/SUB software version.
↓
No
Follow normal operating or standard error-code process.
↓
Yes
Explain bulletin: not product malfunction; likely electrical noise influence.
↓
Qualified person onsite?
If not, arrange authorised attendance.
!Stop
↓
Complete DIP switch reset
Use the installer SOP.
✓Confirm

5.2 Cancellation flow

Cancel unintended TEST_MODE screen
Step 1 - Turn off indoor unit
Turn off the indoor unit before opening the controller.
⏻Power
↓
Step 2 - Open front case
Open the front case of the touch-panel wired remote controller. Refer to the installation manual for front-case opening method.
▣Front case
↓
Step 3 - Locate rear DIP switch
DIP switch is on the backside of the front case.
↓
Step 4 - Cycle DIP switch
Turn DIP switch OFF, wait a few seconds, then turn it ON again.
OFFDIP Off⏱WaitONDIP On
↓
Step 5 - Reinstall front case
Reinstall the front case securely.
▣Front case
↓
Step 6 - Restore power
Turn indoor unit power back on and confirm TEST_MODE does not appear.
⏻Power✓Confirm

5.3 If TEST_MODE returns

If TEST_MODE returns after reset
Confirm procedure
Power off, front case opened, DIP OFF then ON, case reinstalled, power restored.
↓
Does TEST_MODE return?
Confirm at power-on.
↓
No
No parts required. Record correction completed.
↓
Yes
Check site electrical noise sources, nearby switching devices, poor earthing, cable routing concerns or power events.
↓
Escalate with evidence
Attach photos, model details, site conditions and confirmation DIP reset was completed.

6. Installer / technician SOP

StepActionEvidence to record
1Confirm touch-panel wired controller / affected model scope.Controller model, indoor model and installation type.
2Photograph TEST_MODE screen before resetting.Photo of TEST_MODE screen.
3Turn off indoor unit.Power-off confirmation.
4Open front case using installation manual method.Front case opened without damage.
5Locate DIP switch on backside of front case.DIP switch location confirmed.
6Turn DIP switch OFF, wait a few seconds, then turn ON.OFF → ON cycle completed.
7Reinstall front case.Front case clipped/reinstalled.
8Turn indoor unit power back on.Controller powers normally.
9Confirm TEST_MODE screen no longer appears.Post-reset confirmation/photo.

7. Freshdesk ticket checklist

Ticket fieldRecord this
SymptomUnintended TEST_MODE screen at power-on.
Screen evidencePhoto of TEST_MODE screen before reset if available.
Product detailsController model, indoor model, serial number, site address, installer/agent.
Scope matchConfirm if optional wired controller, indoor accessory controller or cassette grille accessory model falls within bulletin list.
Action takenIndoor power off, front case opened, rear DIP switch OFF → ON after a few seconds, front case reinstalled, power restored.
ResultTEST_MODE no longer appears / TEST_MODE returned / unable to complete because no qualified person onsite.
If returnedRecord possible electrical noise sources, recent power events, nearby equipment, cable routing/earthing observations and escalation required.
Parts decisionDo not approve controller replacement unless the bulletin procedure has been completed and recurrence evidence is documented.