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:75*93（ bar LED light）
Mounting holes size：55*90mm
PCB size：100/95/86/70*mm
Ⅲ. Specific Function:
This circuit board has function of touching buttons(two drainage buttons,one for hot water,another for cold water)
 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 (orange LED light shining)
（1） Boot automatically washing for 8s
（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:(blue LED light shining)
 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:(orange &blue LED lighting all the time)
 When the pressure reached a certain degree in pressure bucket,high-voltage switch turned off, the machines shut down,inlet valve closed.
Ⅴ. Lack:(orange &blue LED light shining)
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:( orange &blue LED light shining)
  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.