User manual for the Xinya NA8634 controller that manages temperature, defrost, alarms and timed operation of heat‑pump water heaters.
The NA8634 controller is designed for heat‑pump water heaters and provides three temperature sensors, three control outputs and an external alarm input. It supports temperature display and control, automated defrost, exhaust temperature protection, external alarm handling and time‑based operation modes.
The manual describes the main functions, technical specifications, operation procedures such as setting temperature, time, work mode, economic schedule, advanced parameter settings, and alarm handling, along with wiring diagrams and safety notes. This manual is written in Chinese.
| Temperature display range | -50~150 °C |
|---|---|
| Temperature setting range | 0~100 °C |
| Power supply voltage | 220 V ±10 % |
| Operating environment temperature | -10 °C~50 °C |
| Output load capacity (compressor) | 10 A/250 VAC |
| Output load capacity (other outputs) | 2 A/250 VAC |
| Temperature sensor type | NTC R25=5kΩ, B=3470 K |
Press the “⊙” key, then use the “5” or “6” keys to change hours and minutes, pressing the key again to confirm each step.
A water‑probe fault triggers alarm code A21 and the display shows “---”.
The external alarm can be set to normally open, normally closed, or disabled via parameter F50, and its automatic recovery count and reset time are set with F51 and F52.