Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to DC Volts 
Gain access to PCB (use Insulation Mat as required)
Ensure NO demands
Ensure NO demands
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Test 1:
Measure the DC voltage between pin 7 (red) on
connector X6 and a suitable earth point.
Expected voltage approximately 3V DC with no demand.
Test 2:
Apply a CH demand and perform Test 1 again.
Expected voltage should be approximately 0V DC with a demand.
Measure the DC voltage between pin 7 (red) on
connector X6 and a suitable earth point.
Expected voltage approximately 3V DC with no demand.
Test 2:
Apply a CH demand and perform Test 1 again.
Expected voltage should be approximately 0V DC with a demand.
