Systec DB-45 - Flow Monitor; Maintenance Tasks (All Devices); Checking the Water Level Electrodes

V/D S ERIES
M ECHANICAL ASSEMBLIES
3-62 Revision: 2.1
Flow monitor
(only with installed water feed pump)
V-40 – 55 V-65 – 150 X E B
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D-23 D-45 D-65 – 200 X E B
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The flow monitor (F1) monitors the water supply on the water feed pump
(M1), and thus prevents the impeller from running dry. The flow monitor
must detect a flow eight seconds after switching the water feed pump on,
otherwise the pump switches off with the error message No demin
water.
This process can only be repeated twice, after waiting
30 seconds each time!
In this way, the operator has the opportunity of opening a tap
which may have been closed.
The pump can then only be restarted by switching the main
switch on the device off and then back on again.
3.8.3 Maintenance tasks (all devices)
• Check the heating flange for leaks and seal it, when necessary.
Checking the water level electrodes
• Check the water level electrodes E1, E2 and E3 for leaks:
− Check the electrode seals during a test run. If condensation forms
in the silicone hoses on the electrodes, then this indicates a leak.
• Check the conductivity of the water level electrodes (Menu ->
Service -> Analog inputs -> ElectHigh, ElectLow,
ElectChamb):
− If the water level electrodes are not submerged, the value
displayed must be 999.
If the value is lower, clean the electrodes with a soft cloth soaked in
alcohol.
− If the water level electrodes are submerged, the value displayed
must be less than 714 (X series) or 850 (E and B series) –
parameter 75 (ElectrLeve).
If the value is higher, then the oxide layer must be removed or the
electrodes must be replaced.