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Radiation measured data shows 0 W/m² even though sensor is sufficiently irradiated.
Secondary condition:
Possible cause:
Sensor defective or sensor line disconnected or short-circuited
(radiation sensor can not be checked independently by the regulator for
disconnection or short circuit)
Sensor line connected with improper polarity. With the radiation sensors
the correct polarity must be ensured (see Chapter 2.3)
Flow rate sensor or heat meter determines no or incorrect amount of heat.
Secondary condition:
Possible cause:
'Heat meter' function has not been activated or was programmed with
incorrect settings.
Supply line and return line temperature sensors have been interchanged.
Wrong pulse value has been programmed for the volume flow meter
Wrong percentage of glycol has been programmed
Another medium with different material values was used instead of Tyfocor
L as the solar fluid
Volume meter installed in the wrong flow direction
No flow rate display
on the volume meter
Blockage of a possibly installed filter screen on the
volume meter
Air in the solar circuit
