Coil Check; Fan Check - Siemens EH70650 Repair Instructions

7.5

Coil check

The inductor has no operational parts other than the NTC temperature
sensor, wherefore it is not usually a source of breakdowns.
Nevertheless, the procedure presented below can be followed:
►
The inductor must be checked without power connected.
►
Remove the mica sheet carefully so that it does not become
damaged, and perform a visual inspection. Check that there
are no burned areas.
►
Check the continuity of the inductor using a tester (<1 ohm).
►
Replace the mica sheet, being careful not to damage it.
Do not replace the inductor unless burned zones are observed or
there is no electrical conductivity.
206_58300000105199_ara_en_h – 15.03.a
7.6

Fan check

►
Check to see if the fan is blocked.
►
The working voltage is 24 VDC.
►
It is possible to check the fan using an adequate direct
voltage.
The fan cannot be checked by measuring its resistance, given that it
has a diode factory installed in its own electronics.
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