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：7 blue LED lamps
 Mounting holes size：102/80*32/22mm
 PCB size：110*40mm
Ⅲ. Specific Function:
This circuit board has function of managing filter elements.
1 touch button(short press to strong wash, long press to filter resetting)
Ⅰ. Power :
The computer board energized after 2 seconds to enter the operating  state. 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)Continuously purify water 15 minutes,automatically washing for 5S .
 (3)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. 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.