Set Appliance State:

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

Observation:

The maximum heating output can be reduced in 25 % increments according to system requirements.
Confirm boiler output is set correctly for system requirements
1. Press MODE and UP buttons simultaneously for 3 s.
"SERV" appears on the display and "I" flashes.
2. Use UP/DOWN buttons to select "2" and confirm with OK.
"XX" flashes on the display this corresponds to burner output, a higher value corresponds to higher output.
3. To terminate service mode, Press MODE and UP buttons simultaneously for 3 s, service mode also terminates automatically after 30 min.