Technische Alternative - Varmt vand fra solen

Function check F CHCK:
Some countries only offer subsidies for the installation of solar thermal systems if the control
units have a function check to detect a sensor defect and a lack of circulation. In the
menu command F CHCK, the mechanic can activate this function check for the ESR21. This
function check is disabled ex works.
ON/OFF
FC OFF: The function check is not active.
FC ON: The function check is active. Monitoring makes most sense in solar thermal systems.
The following system statuses and sensors are monitored:
� An interruption or short circuit of sensors 1 or 2.
� Circulation problems - an error message is issued if the output is active and the differential
temperature between collector S1 and tank S2 is greater than 60K for more than 30
minutes.
The error messages are entered in the menu Stat. If Stat is blinking, a malfunction or special
system status has been detected (see “The status display Stat”).
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