Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Carry out full short circuit check and resistance to earth check on appliance
Replace fuse with one of the correct rating
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Measurement:

Ensure there is a requirement for CH and DHW demand.
Apply demands.
Select from the options below the results of test.