General Assist Technical Reference
UTY-RVNYN - Error History Function
How to view stored fault records from the backlit wired controller
The Error History function allows technicians to review recent system fault records directly from the UTY-RVNYN wired remote controller. Each record displays the date, time, indoor unit address and corresponding error code to support diagnosis.
1. Access the Error History screen
| 1 | Open the Submenu. Press the Menu button twice to move from the Monitor screen to the Submenu. |
| 2 | Enter Service Mode. Press and hold the left and right screen-switch buttons at the same time for approximately five seconds. |
| 3 | Select Error History. Use the Up/Down cursor buttons to highlight Error History. |
| 4 | Open the error log. Press the Enter button to display the stored records. |
Quick access: Menu twice → hold Left + Right for 5 seconds → select Error History → press Enter.
2. Information shown in the error log
| Column | Description |
|---|---|
| No. | Sequential number assigned to the stored fault record. |
| Date | Date on which the error was recorded. |
| Time | Time at which the error was detected. |
| Address | Indoor unit address associated with the fault. |
| Code | Recorded error code, for example Er 411 or Er J2u. |
Use the Left/Right cursor buttons to move between pages when more records are available than can be shown on one screen.
3. Important notes
- Up to four error records are displayed on each page.
- Stored error history is retained if the power supply is temporarily interrupted.
- Use the applicable service reset or commissioning procedure if the error log needs to be cleared.
- Refer to the relevant Design and Technical Manual for the meaning of each error code and the required diagnostic procedure.
Service reminder: Error history identifies when and where a fault was recorded, but it does not confirm the root cause. Complete the applicable electrical, refrigerant and communication checks before replacing components.
This guide is intended for trained service personnel working on compatible AIRSTAGE systems.
