1. Auxiliary power supply/non auxiliary type jumper option, auxiliary power supply type can make sure user has hot water supplied under how temperature. It has full heating protection: bipolar control, current leak protection, anti-dry heating, high temperature protection. Automatically select compressor or auxiliary heating running
2.Multi-temperature detection. Detect tank water temperature, outdoor temperature, compressor air-out temperature, defrost temperature detection and display
3. Full protection function: high/low voltage protection, water flow ON/OFF detection, sensor failure detection, compressor high temperature protection, compressor 3 minutes delay protection.
4.Digital display/LCD display, display real time and heating time and all temperature.
5.Manual heating, timing heating, Max. two short timings heating a day.
6. intelligent defrost and manual defrost function
7. Double CPU design, adopt current loop or RS485 communication between main board and display board. Main board carry on all control function and display board is only used to setting parameter and display monitoring. Main board can run separately. Added system errors endure function. e: