Warning E04: water velocity is lower than the lower limit

Warning E04: water velocity is lower than the lower limit

a) This failure means that “water velocity is lower than the lower limit”. It occurs easily after water replacement of instrument and could be resolved by restarting the instrument for several times.

b) Replace filter element if it is not caused by the above circumstance.

c) If not caused by the above circumstance, this failure may be resulted from aging of part of components. According to the “water circuit specification”, check one by one by replacing the water circuit components such as handpiece and water pump, to determine the failure point. Please check whether the water circuit in handpiece is bent and whether the part of main console handpiece connector is blocked mainly.    

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