Operation manual of solar controller SR1568
Page 73 of 87
If the shutdown option has been activated for the flow rate monitoring function, the tank being
loaded will be blocked for any further loading until the error message has been
acknowledged. The next tank free for loading will be loaded instead, if possible. When the
error message has been acknowledged, the monitoring function will be active again.
Note: If the flow rate sensor used is removed, flow rate monitoring will be deactivated.
PRESS Pressure monitoring
Note: The pressure monitoring function will only be available when an RPD type
Grundfos Direct Sensor™ is connected.
The pressure monitoring function can be used for detecting overpressure or low pressure
conditions inside the system, and if necessary to shut down the affected system components
in order to avoid system damage.
Overpressure (OOVPR)
If the system pressure exceeds the adjustable switch-on pressure value, an error message
will appear.
If the shutdown option has been activated for the overpressure monitoring function, the solar
system will be shut down as well in the case of a fault condition. When the pressure reaches
or falls below the adjustable switch-off pressure value, the system is switched on again.
Note: For the overpressure monitoring function, the switch-on pressure value must
be at least 0.1bar higher than the switch-off pressure value. The adjustment ranges
will automatically adapt to that.
Low pressure (leakage OLEAK)
If the system pressure falls below the adjustable switch-on pressure value, an error message
will appear.
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