PBV20N2 PBV20N2 Service Service ManualManual
5. 5. Reverse Reverse the the connectionconnections.s.
This time a high or OL reading should be obtained.This time a high or OL reading should be obtained.
If the results do If the results do not match the expected values, there is something wrong with the not match the expected values, there is something wrong with the diodediode
connection:connection:
•
• If the results are If the results are opposites of the expected values, the diode has been assembledopposites of the expected values, the diode has been assembled
with incorrect polarity.with incorrect polarity.
•• If the ohms values are If the ohms values are ~0~0 Ω in both directions, the diode is shorted and needs to beΩ in both directions, the diode is shorted and needs to be
replaced.replaced.
•• If the ohms values are ~If the ohms values are ~∞∞ΩΩin both directions, the diode is broken and needs to bein both directions, the diode is broken and needs to be
replaced.replaced.
8.88.8 Wiring harnesses and cablesWiring harnesses and cables
There are a few There are a few issues that need to be checked with issues that need to be checked with the wire harnesses:the wire harnesses:
•
• To prevent disconnection of the switches, the protective spiral shield of the To prevent disconnection of the switches, the protective spiral shield of the motormotor
cables must not touch the key cables must not touch the key switch or the emergency stop button.switch or the emergency stop button.
•
• To prevent connector and pin damages, wires and cables must not be installed tooTo prevent connector and pin damages, wires and cables must not be installed too
tightly.tightly.
•
•
To prevent possible insulation damagTo prevent possible insulation damages, wires and cables must not es, wires and cables must not lie on sharplie on sharp
edges.edges.
•
•
To prevent wire or cable insulation damages, wires and cables must not be To prevent wire or cable insulation damages, wires and cables must not be installedinstalled
so that a moving element could cause any damage.so that a moving element could cause any damage.
The traction motor cables and wires are placed inside the protective spiral, seeThe traction motor cables and wires are placed inside the protective spiral, seeFigureFigure
72.72.The wire The wire harness should travel between the U- and V-cables. The correct order harness should travel between the U- and V-cables. The correct order ofof
the cables is important to prevent twisting of the cables is important to prevent twisting of the cables.the cables.
Figure 72. Traction motor cables and wires inside the protective Figure 72. Traction motor cables and wires inside the protective spiralspiral
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