Set Appliance State:
Isolate Mains Power to appliance as per TOPs P4
Disconnect inline plug from PCB to DHW flow switch
Disconnect inline plug from PCB to DHW flow switch
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
With the lead disconnected is the display showing the fault code or has it reverted to normal?
Isolate as per TOPs P4
and refit as necessary