Set Appliance State:

Mains Power Off
Turn on the hot tap with a flow rate of 3 l/min
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Does the pump run with the DHW demand?
Note:
The lockout LED only illuminates with a demand, if the lockout LED illuminates at this stage either reset the appliance or click here to investigate further.