Set Appliance State:
CH Demand
Set Boiler Control Thermostat to MAX position
| WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure |
Observation:
Reset lockout as necessary.
Allow boiler to run up to temperature until lockout.
Disconnect middle plug on LH side of PCB and measure resistance across the two brown braided wires.
Note:
Turning off some radiators may reduce time taken for this test.
Allow boiler to run up to temperature until lockout.
| Isolate Mains Power to appliance as per TOP's P4 |
Note:
Turning off some radiators may reduce time taken for this test.
Isolate as per TOPs P4
and refit as necessary