Table 91: Cycling shutdown messages
Message Description
VSD – PRECHARGE –
LOW DC BUS VOLTAGE
1
During Pre-charge, the DC Bus voltage must exceed the minimum
threshold which is determined by Line Voltage Setpoint (see the
following table) within 4 seconds after the pre-charge signal has been
commanded. If this condition is not met, this shutdown is generated.
The VSD logic board shall wait 10 seconds before clearing the fault
and allowing another pre-charge to start. The VFD’s fan(s) and water
pump(s) shall remain energized during this time. The VSD logic board
shall allow up to three consecutive pre-charge-related faults to occur.
After the third consecutive pre-charge-related fault, Safety Shutdown
message VSD – PRECHARGE LOCKOUT is generated.
Line voltage Minimum threshold (V)
380/415 41
460 50
VSD – PRECHARGE –
LOW DC BUS VOLTAGE
2
During Pre-charge, the DC Bus voltage must exceed the minimum
threshold which is determined by Line Voltage Setpoint (see the
table below) within 12 seconds after the pre-charge signal has been
commanded. If this condition is not met, this shutdown is generated.
The VSD logic board shall wait 10 seconds before clearing the fault
and allowing another pre-charge to start. The VFD’s fan(s) and water
pump(s) shall remain energized during this time. The VSD logic board
shall allow up to three consecutive pre-charge-related faults to occur.
After the third consecutive pre-charge-related fault, Safety Shutdown
message “VSD – PRECHARGE LOCKOUT” is generated.
Line voltage Minimum threshold (V)
380/415 414
460 500
VSD – RUN SIGNAL
Redundant RUN signals are generated by the control center; one
via TB6-24 and the second via the Serial Communications link. Upon
receipt of either of the two RUN commands by the VSD, a 5 second
timer shall commence timing. If the run signal on TB6-24 is not
received by the VSD Logic Board within 5 seconds, a shutdown is
performed and this message is displayed. This is generally indicative of
a wiring problem between the control center and the VSD.
VSD – SERIAL
RECEIVE
This shutdown is generated when the VSD logic board has not
received a valid communications packet from the control center for 10
consecutive seconds.
YMC
2
Mod B with OptiView
™
Control Center
124
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