Then replace the sensor by following the same procedure in reverse.
14.6
Fuses
Fuses 1, 2, 3 measure 10.3x38 mm and are contained inside the fuse carrier; while fuse 4 measures 6.3x20
mm; to check the fuses, test continuity using a tester. Use fuses with the ratings indicated in the table:
model UG045, UG090, UG150, UG180, UG300, UG450
fuses 1 and 2 2 A T
fuse 3 1 AF
fuse 4 3.15 A T
Tab.14.a
14.7
Cooling fan
The cooling fan starts when the unit is switched on, and is used to keep the operating temperature of the
electrical panel and the electronics within the design limits. If the fan is faulty, after having removed
panel B (Fig. 14.a):
l detach the electrical connections;
l replace the fan after having unscrewed the fastening screws;
Note: being thermally protected, the fan may switch off temporarily if it overheats, and then will start
again after having cooled down.
104|14. Spare parts and maintenance
gaSteam - UG +0300090EN rel. 1.2– 09.10.2018
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