RESISTANCE FLUE THERMISTOR AND HARNESS

Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4

Set Multimeter to Resistance

Disconnect connector X401 from the PCB

Measurement:

Measure the resistance between the two rightmost
light blue wires (pins 9 and 10) on X401.
Resistance should conform approximately to the table below:

bx pt promax 24 store erp h45744 har x401.gif

bx pt promax 24 store erp pcb and wiring.jpg

Temperature Range (°C)	Resistance Range
0°C to 10°C	41.0kΩ - 68.0kΩ
10°C to 20°C	25.0kΩ - 41.0kΩ
20°C to 30°C	16.0kΩ - 25.0kΩ
30°C to 40°C	10.5kΩ - 16.0kΩ
40°C to 50°C	8.6kΩ - 10.5kΩ
50°C to 60°C	4.9kΩ - 8.6kΩ
60°C to 70°C	3.4kΩ - 4.9kΩ
70°C to 80°C	2.5kΩ - 3.4kΩ
80°C to 100°C	1.3kΩ - 2.5kΩ
100°C to 150°C	400Ω - 1.3kΩ

Note: Clicking on the resistance table will switch between table and graph view.