39
Cause
Remedy
Vitoair draught stabiliser faulty.
Contact your local heating contractor.
Press the rotary selector on the motor and turn it past
position
A
as far as it will go.
A
"Fault"
is displayed, and the red fault indicator flashes. Call up and acknowledge the type of fault (see
page 35).
The DHW is too hot
Cause
Remedy
The control unit is incorrectly adjusted.
Check the DHW temperature and correct it if required
(see page 28).
DHW heating is carried out by the solar thermal sys-
tem.
Check and correct settings, if required, at the solar con-
trol unit.
Separate operating instructions
ã
flashes and "Fault" is displayed
Cause
Remedy
Heating system fault.
Proceed as described on page 35.
ë
flashes and "Service" is displayed
Cause
Remedy
The time for a service, as specified by your heating
contractor, has arrived.
Proceed as described on page 33.
"Controls locked out" is displayed
Cause
Remedy
Control was blocked by your heating contractor.
Your heating contractor can lift this block.
"External hook-up" is displayed
Cause
Remedy
The operating program set at the control unit was
changed by an external device, e.g. extension EA1.
No remedy is required.
What to do if...
There is no hot water
(cont.)
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