80
FAULT FINDING
6 720 644 593 (2010/04)
“Therm. disinfection running time error”
The thermal disinfection has
not been carried out.
Target temperature not
reached.
Check the pump. Check the
cylinder temperature. Check
supplementary heating. Check
time setting on programmer
and supplementary heating.
“Collector connections reversed”
The collector temperature
drops 10 K within 15 seconds
of switching on.
Collector connections
reversed.
Fit flow and return pipes
correctly.
“Gravity fed circulation (at night) ”(Expert menu > Settings)
The cut-in temperature
differential for pump SP is
reached between 22:00 and
6:00.
Gravity-feed restrictor opened
manually or defective.
Check gravity-feed restrictor.
Indication/Type of fault
Effect
Possible causes
Remedy
Tab. 13
Possible faults indicated on the display
Содержание Worcester TDS 300
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