Set Appliance State:

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

Observation:

To set boiler to maximum output follow steps below.
1. Turn rotary CH temperature selector for less than 2 s fully clockwise and then back into its control range on the right (see fig.1).
The display shows "SERV" and the boiler water temperature.
2. Adjust the upper heating output (Max output):
Turn rotary CH temperature selector to the control range on the right until the display shows 5 bars (Max output) for the upper heating output (see fig.2).
3. To end, shut down boiler, turn both rotary temperature selectors to their respective original positions.