Models: UTY-CDPXZC / UTY-CDPXZD
1. Overview
The Zone Control Interface monitors communication between the indoor unit, wired remote controller, and optional sensors.
When a fault occurs, error indications appear on both the Zone Control Interface Main PCB (LED indicators) and the Wired Remote Controller display.
2. Display Locations
Main PCB (inside the Zone Control Interface):
Green LED (D40): Power/Operation indicator.
Red LED (D41): Error indicator (flashes to indicate fault type).
Wired Remote Controller:
Displays an error message in the format:Remote controller Code: Er J5-X
3. Normal Operating Display
| Contents | Green LED (D40) | Red LED (D41) | Description |
|---|---|---|---|
| Normal Operation | Lit | Unlit | Zone Control Interface is operating correctly. |
4. Error Display and Codes
| Error Contents | Main PCB LED Indication | Wired Remote Display | Troubleshooting Reference |
|---|---|---|---|
| EEPROM Access Error | Green LED lit / Red LED flashes 1 time | Er J5,1 | 1 |
| Indoor Unit Data Acquisition Error | Green LED lit / Red LED flashes 2 times | Er J5,2 | 2 |
| Communication Error (Indoor Unit ↔ Zone Control Interface) | Green LED lit / Red LED flashes 3 times | Er J5,3 | 3 |
| Communication Error (Zone Control Interface ↔ Wired Remote Controller) | Green LED lit / Red LED flashes 4 times | Er J5,4 | 4 |
| Optional Remote Sensor 1 Error | Green LED lit / Red LED flashes 5 times | Er J5,5 | 5 |
| Optional Remote Sensor 2 Error | Green LED lit / Red LED flashes 6 times | Er J5,6 | 6 |
| Controller Type Error | Green LED lit / Red LED flashes 7 times | Er J5,7 | 7 |
5. Notes
Error Reset: After rectifying the issue, cycle power to clear the error display.
Communication Cable Check: Verify wiring between the indoor unit, interface board, and remote controller for proper connection and polarity.
Sensor Error: If optional sensors are not connected, ensure unused sensor terminals are properly terminated as per installation instructions.
Type Error: Confirm the correct Zone Control Interface model and firmware version are used for the connected system.
