58
Cause
Remedy
Control unit incorrectly set.
Check the settings and correct if required:
■ DHW heating must be on (see
page 35)
■ DHW temperature (see page 35)
■ Time (see page 46)
■ Switching times (see page 36)
DHW cylinder is cold.
Check the settings and correct if required:
■ Set DHW temperature (see page 35)
■ Heating times for DHW heating (see
If the heating times are OK: Check the
temperature of the DHW cylinder. If this
temperature is too low: Inform your local
heating contractor.
The DHW cylinder pump is not running.
Check the heating times. If the pump is
running according to the times set in the
control unit: Inform your local heating
contractor.
Mixing valve faulty
Notify your local heating contractor.
The DHW is too hot
Cause
Remedy
Control unit incorrectly set.
Check and correct the DHW temperature
if required (see page 35).
Sensor fault
Inform your local heating contractor.
"Fault" is shown in the display
Cause
Remedy
Heating system fault
Check the type of fault (see page 50) and
notify your local heating contractor.
What to do if...
There is no hot water
5549 811 GB
Summary of Contents for Vitoligno 300-H
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