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：2 blue LED lamps
 Mounting holes size：138/122*52mm
 PCB size：160*65mm
Ⅲ. Specific Function:
2 touch buttons(button 1 for strong wash,button 2 for resetting machines after shutdown)
Ⅰ. Power :
 The  led lamps shining 5s after computer board energized. Enter the operating state after buzzer chirping. Icon flashes indicate the respective operating state.
Ⅱ. Wash:  s=seconds
（1）Press the "Strong Wash Button" to automatically washing for 18s.
（2）Automatically washing for 18S every 6 hours.
（3）Automatically washing for 18S when water lack turns to source
(4)Automatically washing for 5S after water full
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.
Ⅴ. Lack:
When the low pressure switch detected the water pressure below the set value, enter self-priming process. No water supply after 90s,machines shut down,booster pump stopped,inlet valve closed, buzzer chirping for 10 seconds.
Ⅵ. Check:
  Continuously produced water for 6 hours(no water full), it means something wrong happened to the machine and entered the check process, buzzer chirping for 10 seconds.