25
AT.654254.050 ver.1.0
Troubleshooting manual
Replacement of the MDN unit.
MDN replacement procedure is the same for each VSD.
Preparations:
A VSD must be de-energized and disconnected from a power supply.
Using a multimeter, make sure that there is no dangerous voltage on a
DC-link.
Use the following tools for dismantling the MDN unit:
•
Lineman’s pliers
—
1 pc;
In case if it is necessary to dismantle MDN unit:
1.
Take photo and mark all connectors locations.
2.
Unplug signal connectors (yellow) from a terminal blocks which is shown at
figure 9 and unscrew circuits from a terminal blocks (yellow) using flat screw
driver.
Figure 9
–
Unplug connectors
о
f a MDN unit
