UTY-RNRT Function Settings - ARTH45/54/60KHTA
Purpose: This article explains how to change indoor unit Function Settings using the UTY-RNRT wired remote controller and provides the applicable function numbers and setting values for ARTH45/54/60KHTA ducted indoor units.
Important: Incorrect function settings can cause abnormal operation. Confirm the indoor unit model and apply settings only where required by the installation or site design.
Before You Start
- The installer password may be required. Default installer password: 0000.
- Confirm the indoor unit is ARTH45KHTA, ARTH54KHTA or ARTH60KHTA.
- Identify whether the setting is being applied to one indoor unit address or to All connected indoor units.
How to Change Function Settings
- From Monitor Mode, open Menu and navigate to Maintenance.
- Select Function Setting.
- Touch Address.
- Use ▲/▼ to select the indoor unit address, or select All, then touch OK.
- Touch Function No., select the required Function Number with ▲/▼, then touch OK.
- Touch Setting No., select the required Setting Value with ▲/▼, then touch OK.
- Touch Setting to write the selected values to the chosen address.
- Touch Back to return to the Maintenance screen.
- When all required settings are complete, power-cycle the system OFF then ON.
Function Setting Reference
Function 11 - Filter Sign Interval
Factory setting: 03 - No indication
| Setting | Function |
|---|---|
| 00 | Standard - 2500 hours |
| 01 | Long interval - 4400 hours |
| 02 | Short interval - 1250 hours |
| 03 | No indication - factory setting |
Functions 30 / 31 - Indoor Unit Sensor Correction
30 = Cooling | 31 = Heating
Factory setting: 00 - Standard setting
| Setting | Correction |
|---|---|
| 00 | Standard setting - factory |
| 01 | 0.0°C |
| 02-09 | -0.5°C to -4.0°C - More cooling / Less heating |
| 10-17 | +0.5°C to +4.0°C - Less cooling / More heating |
Functions 35 / 36 - Wired Controller Sensor Correction
35 = Cooling | 36 = Heating
Factory setting: 00 - No correction
| Setting | Correction |
|---|---|
| 00 | No correction - factory |
| 01 | 0.0°C |
| 02-09 | -0.5°C to -4.0°C |
| 10-17 | +0.5°C to +4.0°C |
Controller sensor note: For wired-controller sensor control, Function 42 must be set to 01 (Both) and the Thermo Sensor icon must be displayed on the controller.
Function 26 - Static Pressure
Factory setting: 31 - Standard 60 Pa
| Setting | Static Pressure |
|---|---|
| 06-26 | 60-260 Pa in 10 Pa increments (06=60 Pa, 07=70 Pa ... 26=260 Pa) |
| 31 | Standard 60 Pa - factory setting |
| 32 | Automatic airflow adjustment |
Automatic airflow adjustment - Setting 32:
- Do not use where a booster fan is installed between ducts.
- Ensure external static pressure remains within the allowable range.
- Set Function 26 to 32, operate Fan mode - High, allow the unit to run and stop automatically, then power-cycle the system and record the obtained setting.
Function 40 - Auto Restart
| Setting | Behaviour |
|---|---|
| 00 | Enable - factory setting |
| 01 | Disable |
Functions 42 / 48 - Room Temperature Sensor Switching
| Function | Setting | Selection |
|---|---|---|
| 42 | 00 | Indoor unit - factory setting |
| 42 | 01 | Both |
| 48 | 00 | Both |
| 48 | 01 | Wired remote controller - factory setting |
Function 48 only operates when Function 42 is set to 01 (Both).
Function 43 - Cold Air Prevention
| Setting | Function |
|---|---|
| 00 | Enable - factory setting |
| 01 | Disable |
Function 46 - External Input Control
| Setting | Mode |
|---|---|
| 00 | Operation/Stop mode 1 - factory setting |
| 01 | Setting prohibited |
| 02 | Forced stop mode |
| 03 | Operation/Stop mode 2 |
Function 49 - Cooling Energy-Saving Fan Control
Factory setting: 02 - Remote controller
| Setting | Behaviour |
|---|---|
| 00 | Disable - continuous indoor fan when outdoor unit is stopped |
| 01 | Enable - intermittent very low fan speed |
| 02 | Remote controller - factory setting |
Function 60 - External Output Terminal
| Setting | Output Function |
|---|---|
| 00 | Operation status - factory setting |
| 09 | Error status |
| 10 | Fresh air control |
| 11 | Auxiliary heater |
Functions 68 / 69 - Auto Mode
| Function | Setting | Selection |
|---|---|---|
| 68 | 00 | Single setpoint auto - factory setting |
| 68 | 01 | Dual setpoint auto |
| 69 | 00 | 0°C deadband - factory setting |
| 69 | 01-09 | 0.5°C to 4.5°C in 0.5°C increments |
Final check: Record any altered function numbers and setting values on the commissioning documentation. After changes are complete, power-cycle the system and verify normal heating, cooling and fan operation.