Ⅰ. Summary: water filter circuit board
 1.Application scope：≦400G water purifier
 2.Operating temperature：-20°C - +70°C
 3.Operating Humidity：5%-85%
Ⅱ. Performance Indicators:
 Power supply：DC24V
 Load current：3A
 Controls Power Consumption：＜ 5W
 Screen size：70*30mm
 Mounting holes size：120/110*50/40/20mm
 PCB size：130*60mm
Ⅲ. Specific Function:

computer board damage,machine can continue to work.
Ⅰ. Power :
 The computer board energized after 2 seconds to enter the operating  state. Buzzer chirping and machine automatically wash for 18s. Icon flashes indicate the respective operating state.
Ⅱ. Wash:  s=seconds
（1） Boot automatically washing for 18s
（2）Water full for1minite and enter in the purify process automatically washing for 8S

Ⅲ. Purify:
 When the switch detected a pressure lower than normal high pressure,the booster pump started to work,inlet valve opened and entered the purify process.
Ⅳ. Full:
 When the pressure reached a certain degree in pressure bucket,high-voltage switch turned off, the machines shut down,inlet valve closed.