Set Appliance State:

WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

The maximum central heating flow temperature can be limited on this appliance, this can be done for safety reasons or because of operational reasons - for example underfloor heating.
Enter the installer mode and access level 5 - A1 for the maximum flow temperature setting.
(click here for information on how to do this)
Is the maximum temperature setting appropriate for the system?
Note:
The default maximum is 88°C but it may have been reduced.