3-34 Troubleshooting
7000-TD002A-EN-P – September 2007
WARNING
MESSAGE
WARNING
CODE
DESCRIPTION RECOMMENDED ACTIONS
BlkBox NVRAM Clr 176 Black Box NVRAM has been cleared. – NOT USED
Bus Transient 164 This warning indicates a line side switching
transient has occurred. The drive puts both
bridges in freewheel mode till the event is
cleared and resumes normal operation.
Check system for capacitative switching
events.
– Check system for capacitive switching
events
– Check the drive if it is unstable.
– Check Alph line is it is stable.
– Contact factory for detailed actions
Bypass CtctrOpen 188 The bypass contactor is open even though it
has been commanded to close. Verify the
contactor feedback and the 120V wiring to
the ACB.
Bypass CtctrClsd 189 The bypass contactor is closed even though
it has been commanded to open. Verify
normal mode of starter the contactor
feedback and the 120V wiring to the ACB.
– Ensure the associated starter unit is set
to Normal mode
– Verify the feedback from the contactor
status (normally control relay auxiliary
and contactor mechanical auxiliary) is
wired properly and powered
– Verify that there is control power to the
contactor
– Verify the associated ACB I/O
– Verify that the Holding Coil or Closing
Coil is not shorted
– Review Contactor control wiring
– These warnings may also occur during
the autorestart feature, as the loss of
power may also result in the inability to
hold in the contactor during the outage
Bypass
IsoSwOpen
192 The bypass contactor is open even though it
has been commanded to close, which is in
Normal mode, DC Current test mode, and
Open Loop test mode. Verify the contactor
feedback and the 120V wiring to the ACB.
Bypass IsoSwClsd 195 The bypass isolation switch is closed when
it is expected to be open. The switch should
be open in in all operating modes of the
drive except Normal. Ensure proper
positioning, wiring feedback to ACB, mech
auxiliary setup.
– In DC Current test modes, the isolation
switches are expected to be closed for
DC Current test; although only the input
contactor is required the test will run with
warnings if the switches are open
– Ensure the isolation switches are in the
proper position for the specific operating
mode (Refer to the description of the
Parameter 141 – Hardware Option1 in
the parameters manual)
– Verify wiring feedback
– Verify isolation switch mechanical
auxiliary setup
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