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Troubleshooting manual
AT.654254.050 ver.1.0
The VSD diagnostics during Power Switch failure (stopped)
VSD is ready
The VSD is turned on and the Power switch alarm is
displayed on the screen
On the controller screen, in addition to the alarm value, other parameters
from the drive are displayed. Otherwise, there may be no connection
between UMKA07 and the drive (GB).
Not
Check that the cables from the GB unit coming to
the 3MDS are connected and not damaged
Check that the cables going from the GB to the 3MDS unit are connected
and have no visible damage, the connectors are latched. To check, pull
each one out and snap it into place until it clicks. If damage is found,
replace the cable with a working one and without damage.
Not
To determine which of the blocks can cause fault, carry out
the following actions: In the 3MDS, interchange the cable IGBT with «power
switch» fault with the neighboring cable. Check whether the readings transfer to
another phase or not. If they do,
there is a problem in the module for this phase. If they dont - the problem is in
GB or 3MDS blocks
module
GB or 3MDS
Replace the GB 3MDS units with a working ones
with the correct software version for this VSD,
followed by GB controller configuration.
Replace inverter modules with working ones. When installing several
modules in the phase of the inverter, all modules for this phase must be
changed. Parallel connection of modules is allowed only if modules are
from the same batch.
Check that power is supplied to all drivers in the
inverter blocks
Using a tester measurement mode voltage DC, verify that voltage of 24 v
comes to 3MDS blocks on connector P69(XT1).
Not
