Viking VICU206 - Cooling Fan; NTC Temperature Sensor

© 2009 Viking Preferred Service
31
Service Diagnostics and Procedures
Cooling Fan
The cooktop uses cooling fans to help with heat
management. The fan ensures the electronics and
switches are kept cool during cooking modes as
well as pulls excess heat from the cooktop. The fan
(X57) is 12 VDC, 0.38 amp, 4.6 W, 9400 Ω.
NTC Temperature Sensor
The cooktop uses a N.T.C. sensor under the main
glass top. It is used for two purposes. One is to
protect the inductors and the second is to detect
an overheat situation. In either case, once an over
temperature is detected, the unit shuts down.
Measure the resistance of the sensor and compare
to the chart below.
˚F ˚C Rnenn Ro Ru
32 0 917.56 920.88 914.23
77 25 1001.7 1006.7 996.7
122 50 1085.5 1092.2 1078.9
167 75 1168.7 1177.1 1160.4
212 100
1251.3
1261.4 1241.4
257 125
1333.3
1345 1321.7
302 150
1414.7
1428.1 1401.4
347 175
1495.5
1510.5 1480.5
392 200
1575.6
1592.3 1559
437 225 1655.1
1673.5
1636.9
482 250
1734
1754 1714.2
527 275
1812.3
1834 1790.8
572 300
1890
1913.3 1866.9
617 325
1967.1
1992 1942.3
662 350
2043.5
2070.1 2017.1
Cooling Fan
Test Points