Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Place a temperature probe/clamp on the flow pipe
Ensure NO demands
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Measurement:

The anti-freeze function activates when the temperature drops below the value set in Parameter 23 (default setting 3°C).
CLICK HERE for guidance on how to check the value set in Parameter 23.
Measure the temperature of the flow pipe.
Is the temperature measured lower than the value set in Parameter 23?
Note:
The default setting is 3.