HAKO 7580.02, Сервисная книжка

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Foil 52
8. Water Pump
8.1 Water Amounts
For checking function of the water pump, voltage for each of the stages can be
measured at Module 1 (A5:X2:6+7).
When using a True RMS device, having water in the tank and ensuring that suction
turbine is OFF, the values from the following table shall be obtained:
When using other than the indicated measuring devices, values may vary since
measured voltage is pulsed. Beyond that the value depends on battery voltage.
Here, measurement was done with charged battery presenting three green LED
lighting in the battery indication.
The voltage values in the table are given for the Hakomatic B1100 and B1050PB only.
Beyond that, evaluation of the actually delivered water amount is to be
preferred since voltage values only indicate whether water pump control is
operable or not.