Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to DC Volts 
Turn Hot Water Tap On
Adjust DHW flow rate to approx. 6 litres/min
DHW Temperature Control set to MIN
Ensure boiler is cool, this can be achieved by turning the gas off
and running a hot tap with the power on to the appliance
DHW Temperature Control set to MIN
Ensure boiler is cool, this can be achieved by turning the gas off
and running a hot tap with the power on to the appliance
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Allow burner to ignite and establish.
Monitor the DC voltage between the white wires
(30 & 31) at the right hand plug on the PCB.
The voltage should initially reach approximately 20V DC
then as the appliance starts to reach temperature (after
approximately 45 seconds) the voltage should decrease.
Monitor the DC voltage between the white wires
(30 & 31) at the right hand plug on the PCB.
The voltage should initially reach approximately 20V DC
then as the appliance starts to reach temperature (after
approximately 45 seconds) the voltage should decrease.
