NA822 NEWASIA (220V) Controller
Key Functions and Features

• Dual Mode Operation: Automatically switches between refrigeration and heat pump heating modes.
• Protection Systems: Features automatic heat pump defrosting and compressor start-up delay protection.
• Alarm Functions: Includes a temperature control probe abnormal alarm. 
• Temperature Display Range: -50°C to 125°C (resolution is 0.1°C between -9.9°C and 99.9°C, and 1°C outside this range).
• Temperature Setting Range: -45°C to 120°C.
• Power Supply: 220V AC (or primary voltage with a transformer). 

If you need help with wiring diagrams, error codes, or parameter settings for the NA822, let me know what specific issue you are troubleshooting.