
T r o u b l e s h o o t i n g
Power Module DN
Version 09.2019
Page 34/43
9.8 Demagnetization pulse check
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Prepare suitable current clamp
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Open power module
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Clamp current clamp around power cable a
Coil module connector
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Trigger pulse and record current over entire pulse length
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Maximal current (RMS) corresponds to the value in the inspection protocol
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Take a picture of the pulse (example see below) and send incl. setup current clamp
(mV/A) to Maurer Magnetic AG for analysis
Figure 9: Measurement demagnetization pulse
9.9 Malfunction external coil fan at Fan connector
Inspect fuse 1FT2: Fuse
Fan connector