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FAULT FINDING
Indication/Type of fault
Effect
"Therm. disinfection running time error"
The thermal disinfection has
not been carried out.
"Collector connections reversed"
The collector temperature
drops 10 K within 15 seconds
of switching on.
"Gravity fed circulation (at night) "(Expert menu > Settings)
The cut-in temperature
differential for pump SP is
reached between 22:00 and
6:00.
Tab. 13
Possible faults indicated on the display
80
Possible causes
Target temperature not
reached.
Collector connections
reversed.
Gravity-feed restrictor opened
manually or defective.
Remedy
Check the pump. Check the
cylinder temperature. Check
supplementary heating. Check
time setting on programmer
and supplementary heating.
Fit flow and return pipes
correctly.
Check gravity-feed restrictor.
6 720 644 593 (2010/04)
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