XSol Diagnostic System

RESISTANCE DHW SENSOR AT PCB

Set Appliance State:

Set Multimeter to Resistance

Isolate Mains Power to appliance as per TOPs P4
Disconnect connector ST16 from the PCB

Measurement:

Measure resistance between yellow (5) and black (6) connections at ST16.

wc si 2 h02-159 st16 connector 3 gas valve solenoids .gif

@pblackdrs.gif

@predurs.gif

wc si 2 exposed pcb.gif

Resistances vary with temperature and should conform approximately to the table below:

Temperature Range (°C)	Resistance Range
0°C to 10°C	20.0kΩ - 33.0kΩ
10°C to 20°C	12.0kΩ - 20.0kΩ
20°C to 30°C	8.0kΩ - 12.0kΩ
30°C to 40°C	5.3kΩ - 8.0kΩ
40°C to 50°C	3.6kΩ - 5.3kΩ
50°C to 60°C	2.5kΩ - 3.6kΩ
60°C to 70°C	1.8kΩ - 2.5kΩ
70°C to 80°C	1.3kΩ - 1.8kΩ
80°C to 90°C	1.0kΩ - 1.3kΩ
90°C to 100°C	700Ω - 1.0kΩ

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