1.PCBA design for heat pump water heater 2.Punctual delivery 3.Short circuit protection Specification:1. Auxiliary ... failure detection, and have corresponding erro code shows.2. Digital screen, display level, temperature, fault code, real time clock, timing time, ... . It can set the heating temperature, timing heaing time, input water leavel, timing input water time.4. Water level detecton, AC/DC valve ...