Set Appliance State:

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

Observation:

Is the Pump running?
Notes:
1. The pump is not integral to the appliance and will be elsewhere on the system.
2. Do not take noise or vibration as an indication the pump is running. If the vent screw is removed to confirm operation ensure any water released is safely contained.