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Cause Remedy
Incorrect control unit settings. Check and correct the set DHW temperature if re-
quired: See page 34.
The hygiene function is switched on. Wait until the hygiene function has been completed.
DHW temperature for solar DHW heating is set too
high.
Have your contractor change the setting.
"Fault" is displayed
Cause Remedy
System fault Proceed as described on page 45.
ë and "Service" are displayed
Cause Remedy
The time for a service as specified by your contractor
has arrived.
Proceed as described on page 44.
"Panel locked" is displayed
Cause Remedy
The control panel is locked. Unlock it: See page 37.
"External hook-up" is displayed
Cause Remedy
The set operating program was changed over by an ex-
ternal device, e.g. an EM-EA1 extension (DIO electron-
ics module): See page 19.
No action required.
Once the external changeover no longer applies, the
set operating program is switched on again.
What to do if...
The DHW is too hot
5593212
53


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