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FAULT FINDING
Type of fault
Effect
Cylinder temperature limit and hot water mixer are set too high.
Pump is being activated/
deactivated too early / too
late.
Domestic hot water is too hot.
risk of scalding
Domestic hot water too cold (or hot water flow rate too slow).
Tab. 14
Possible faults not indicated on the display
82
Possible causes
Temperature sensor incorrectly
fitted.
Incorrect temperature sensor
fitted.
Cylinder temperature limit and
hot water blending valve are
set too high.
Domestic hot water
temperature is set too low on
boiler control, on heating
programmer or on hot water
blending valve.
Remedy
Check position, installation and
type of sensor; add heat
insulation if necessary.
Set the cylinder temperature limit
and hot water blending valve to a
lower setting.
Set temperature according to the
appropriate operating
instructions (max. 60 °C).
6 720 644 593 (2010/04)
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