General Assist Technical Reference
UTY-RVNYN Wired Remote Controller
Adjusting function settings
Accessing function settings, room-temperature sensor control and ducted static-pressure settings
This procedure explains how to enter the service menu on the UTY-RVNYN controller, select a function number and setting value, and apply commonly used sensor and static-pressure settings.
Important: Function settings affect system operation. Only change settings when the required value is known. After completing the function setting, turn the system power OFF and then ON again so the new setting is applied.
1. Access the function settings menu
| Step | Action |
|---|---|
| 1 | From the normal controller screen, press the Menu button. |
| 2 | Press the Menu button again to move through the menu pages. |
| 3 | Press and hold the left and right screen-selection buttons together for approximately 2 seconds to enter the service menu. |
| 4 | Use the Down arrow to highlight Function setting, then press the Enter button. |
2. Enter a function number and setting value
The Function Setting screen contains three fields:
- R.C. Address – refrigerant/control address. On a standalone unit this is generally 00.
- Function No. – the function to be changed.
- Setting No. – the value to be assigned to that function.
| Step | Action |
|---|---|
| 1 | Confirm or select the required R.C. Address. |
| 2 | Press the Right cursor button to move to Function No. and enter the required function number. |
| 3 | Press the Right cursor button again to move to Setting No. and enter the required setting value. |
| 4 | Press the Enter button to register the setting. |
| 5 | When all required changes are complete, reset power to the system. |
3. Room-temperature sensor settings
Function 42 – Indoor room-temperature sensor switching
This setting is used when the wired remote-controller temperature sensor or an optional sensor is to be used.
| Setting description | Function No. | Setting No. | Operation |
|---|---|---|---|
| No (factory setting) | 42 | 00 | Room temperature is controlled by the indoor-unit temperature sensor. |
| Yes | 42 | 01 | Room temperature is controlled by the indoor-unit temperature sensor, remote-controller sensor, or optional sensor. |
Function 48 – Room-temperature control switching
This setting determines the room-temperature control method when the wired remote-controller/optional sensor is selected.
| Setting description | Function No. | Setting No. | Operation |
|---|---|---|---|
| No (factory setting) | 48 | 00 | Room temperature is controlled by the sensors of both the indoor unit and the wired remote controller/optional sensor. |
| Yes | 48 | 01 | Room temperature is controlled by the wired remote-controller/optional sensor. |
Common configuration: Where the wall controller is intended to both display and control from its own room-temperature sensor, the source document shows Function 42 = 01 and Function 48 = 01 as the relevant sensor-selection functions.
Optional sensor / controller sensor conditions
The source material also notes that sensor availability depends on whether optional sensors and primary/secondary controller sensors are enabled. If an optional sensor is set to Not in use, it cannot be selected for room-temperature sensing. Likewise, a remote-controller temperature sensor cannot be used when that controller sensor is disabled.
4. Static-pressure setting
Select the static-pressure value that matches the installed ductwork and system requirements.
| Setting description | Function Number | Setting Value |
|---|---|---|
| Normal (60 Pa) (factory setting) | 21 | 00 |
| High static pressure 1 (100 Pa) | 21 | 02 |
| High static pressure 2 (150 Pa) | 21 | 03 |
| High static pressure 3 (200 Pa) | 21 | 04 |
Commissioning note: Static pressure should be selected to suit the actual installation conditions. An incorrect value can affect airflow and overall system performance.
5. Quick reference
| Requirement | Function | Setting |
|---|---|---|
| Enable use of remote-controller / optional room sensor | 42 | 01 |
| Control room temperature from wired remote-controller / optional sensor | 48 | 01 |
| 60 Pa static pressure | 21 | 00 |
| 100 Pa static pressure | 21 | 02 |
| 150 Pa static pressure | 21 | 03 |
| 200 Pa static pressure | 21 | 04 |
Technical reference based on the supplied UTY-RVNYN function-setting material. Verify the applicable indoor-unit service documentation before changing settings on a specific model.