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)
Pull connector X4 back slightly to expose soldered points on PCB as shown
Pull connector X4 back slightly to expose soldered points on PCB as shown
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
If boiler is in lockout reset it then turn mains power OFF then back ON
so that it starts the appliance self check. (AP shown on display).
With the fan running measure the voltage
between pin 6 (white) and pin 7 (black).
Voltage should be approximately 10V DC.
Note:
Fan must be running to measure correct voltage.
so that it starts the appliance self check. (AP shown on display).
With the fan running measure the voltage
between pin 6 (white) and pin 7 (black).
Voltage should be approximately 10V DC.
Note:
Fan must be running to measure correct voltage.
Isolate as per TOPs P4
and refit as necessary