Overview
The Error History function allows technicians to review recent system fault records directly from the UTY-RVNYN backlit wired controller. Each entry displays the date, time, indoor unit address, and corresponding error code for diagnostic purposes.
Accessing the Error History Screen
Enter the “Service” Menu
Press the [Menu] button twice to switch from the “Monitor” screen to the “Submenu.”
Hold both [Left] and [Right] screen switch buttons simultaneously for 5 seconds to enter Service Mode.
Open the Error History Function
Use the [Up/Down Cursor] buttons to scroll to “Error History.”
Press the [Enter] button to access the error log list.
Viewing Error Information
Once in the Error History screen, the following information will be displayed:
| Column | Description |
|---|---|
| No. | Sequential number of the stored error record. |
| Date | Date the error occurred. |
| Time | Time the error was detected. |
| Address | Indoor Unit (I.U.) address that generated the fault. |
| Code | Specific error code (e.g., Er 411, Er J2u). |
Use the [Left/Right Cursor] buttons to scroll through pages if multiple errors are recorded.
Notes
Up to four (4) historical errors can be displayed at one time.
Error history is retained even if the power supply is temporarily interrupted.
To clear the error log, refer to the service reset procedure in the system commissioning section.
Refer to the D&T (Design & Technical) Manual for detailed error code definitions and corrective actions.
Quick Access Summary:Menu (x2) → Hold Left + Right 5 sec → Scroll to “Error History” → Enter
