Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Remove selector switch control knob
Ensure NO demands
Ensure NO demands
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Reset the boiler / cancel pump purge as necessary.
Test 1:
Using a small flat blade screwdriver turn the maximum trimmer slightly - this will cause the display to show the fan speed in multiples of 1000 i.e. 5.2 would be 5200rpm. Check the value displayed corresponds to the table for the appliance you are working on.
Test 2:
Using a small flat blade screwdriver turn the minimum trimmer slightly - this will cause the display to show the fan speed in multiples of 1000 i.e. 5.2 would be 5200rpm. Check the value displayed corresponds to the table for the appliance you are working on.
Are the fan speeds set correctly as per the table?
Note:
Leaving the maximum or minimum trimmers for 10 seconds or greater returns the display to normal.
Test 1:
Using a small flat blade screwdriver turn the maximum trimmer slightly - this will cause the display to show the fan speed in multiples of 1000 i.e. 5.2 would be 5200rpm. Check the value displayed corresponds to the table for the appliance you are working on.
Test 2:
Using a small flat blade screwdriver turn the minimum trimmer slightly - this will cause the display to show the fan speed in multiples of 1000 i.e. 5.2 would be 5200rpm. Check the value displayed corresponds to the table for the appliance you are working on.
Are the fan speeds set correctly as per the table?
Note:
Leaving the maximum or minimum trimmers for 10 seconds or greater returns the display to normal.
Isolate as per TOPs P4
and refit as necessary