Viessmann VITOLADENS333-F Service Instructions Manual page 75

Type vp3s, 12.9/19.3 kw, 16.1/23.5 kw oil fired compact condensing boiler, for the combustion of low sulphur fuel oil din 51603-el-1

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Repairs

(cont.)

2. Test the resistance of the outside

temperature sensor across term-

inals "X3.1" and "X3.2" on the dis-

connected plug and compare it with

the curve.

Checking the boiler water temperature sensor, the cylinder

temperature sensor or the flow temperature sensor for a low

loss header

3. Where actual values strongly devi-

ate from the curve values, discon-

nect the wires at the sensor and

repeat test immediately at the sen-

sor.

4. Subject to result, replace the lead

or the outside temperature sensor.

Troubleshooting

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