Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to AC Volts 
Gain access to PCB (use Insulation Mat as required)
Any DHW controls turned ON
Any DHW controls turned ON
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Measure the voltage between terminals 3 and 5
at connector X2 on the PCB.
Mains voltage should be present.
Notes:
1. This test can be carried out while appliance is doing self check.
2. If no DHW controls are fitted then a link should be present between terminals 3 and 4.
at connector X2 on the PCB.
Mains voltage should be present.
Notes:
1. This test can be carried out while appliance is doing self check.
2. If no DHW controls are fitted then a link should be present between terminals 3 and 4.
Isolate as per TOPs P4
and refit as necessary