Operation Manual

6 720 645 350 (2010/09)
Troubleshooting | 31
Problem Cause Remedy
Temperature rises
instead of dropping.
Time incorrectly set. Set the time.
Room temperature too
high during "Economy"
and/or "Frost" mode.
Building retains a lot of heat. Set earlier switching time for
"Economy" and/or "Frost".
Incorrect or nocontrol. For example, connection between
controller and heating appliance
faulty.
Contact authorised contractor or
customer service.
Only automatic mode
can be selected.
Operating mode selector faulty. Contact authorised contractor or
customer service.
DHW cylinder does not
heat up.
DHW temperature controller
1)
set too
low on heating appliance.
Set DHW temperature controller
1)
higher.
Possibly reduce solar optimising
influence
2)
Flow temperature controller
1)
on
heating appliance set too low.
Set flow temperature controller
1)
fully clockwise.
DHW program incorrectly set.
Set DHW program.
The set System configuration for DHW
heating does not suit this heating
system.
Contact authorised contractor or
customer service.
Tab. 9 Troubleshooting, part 2
1) Further information in the operating instructions of the heating appliance.
2) Further details in the full installation and operating instructions of the controller.