8
Cause Remedy
The solar control unit MCB has respon-
ded.
Inform your local heating contractor.
Power failure The solar control unit automatically re-
turns to operation once the power supply
has been restored.
The power distribution MCB (main do-
mestic MCB) has responded.
Check the MCB and inform your heating
contractor if necessary.
The collector limit temperature or maxi-
mum cylinder temperature has been
reached.
Wait until the relevant temperature has
fallen below its respective limit.
The solar control unit is in manual mode.
The display shows "
Æ
" and "
¨
" flash-
es.
Select "Auto":
1. Press until "ANL" is displayed.
2. Press until "HND 1" or "HND 2" is
displayed.
3. Press OK, "SET" flashes.
4. Press until "Auto" is displayed.
5. Press OK to confirm.
6. Press . The collector temperature is
displayed.
There is no DHW available
Cause Remedy
The solar control unit is faulty. Inform your local heating contractor.
The collector temperature is too high,
safety shutdown by the solar control
unit.
Wait until the collector temperature has
dropped.
The set cylinder temperature (set DHW
temperature) is set too low.
Inform your local heating contractor.
The solar circuit pump is faulty. Inform your local heating contractor.
The DHW cylinder is not being reheated:
The operating and time programs on the
boiler control unit are incorrectly set.
Enable DHW heating.
Operating instructions of the boiler
control unit
What to do if...
The solar thermal system does not start
5592 640 GB
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