Ⅰ. Summary:water filter circuit board
1.Application scope：water purifier no more than 400G
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：65*52mm
PCB size:70*80mm
Ⅲ. Specific Function:
This circuit board has touch buttons function
Power: short press to boot and shutdown
Drainage:short press to drain and stop(long press to strong wash and get back)
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）Press the "Strong Wash Button" to automatically washing for 18s.
（3）Automatically washing for 18S every 6 hours.
（4）Automatically washing for 18S when water lack turns to source
（5）Automatically washing for 8S after water full (Cumulatively purify more than 60s, automatically washing for 8S 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 source 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 or the computer board detected low pressure switch off,the 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.