Johnson Controls YORK YVAM 0350, Operation & Maintenance Manual

Page: 100 / 162

Table 91: Cycling shutdown messages
Message Description
VSD – PHASE LOCKED LOOP
The drive must be able to determine the input voltage frequency from the input voltage
measurement. If the input voltage frequency is not stable enough for the drive to make
this determination, then this shutdown is generated.
VSD – PRECHARGE – LOW DC
BUS VOLTAGE 1
During pre-charge, the DC Bus voltage must exceed the minimum threshold that is
determined by Line Voltage setpoint within 4 seconds after the pre-charge signal has been
commanded. See the following table.
Line voltage Minimum threshold (V)
380/415 41
460 50
If this condition is not met, this shutdown is generated. The drive logic board waits 10
seconds before clearing the fault and allowing another pre-charge to start. The drive’s
fan(s) and water pump(s) remain energized during this time. The drive logic board allows
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. Ensure that the input voltage setpoint on the control center is properly set for
the application.
VSD – PRECHARGE – LOW DC
BUS VOLTAGE 2
During Pre-charge, the DC Bus voltage must exceed the minimum threshold that is
determined by Line Voltage Setpoint within 12 seconds after the pre-charge signal has
been commanded. See the following table.
Line voltage Minimum threshold (V)
380/415 414
460 500
If this condition is not met, this shutdown is generated. The drive logic board waits 10
seconds before clearing the fault and allowing another pre-charge to start. The cooling
fan(s) and pump(s) remain energized during this time. The drive logic board allows
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. Ensure that the input voltage setpoint on the control center is properly set for
the application.
VSD – RUN SIGNAL
Redundant Run signals are generated by the control center: one by TB6-24 and the second
by the Serial Communications link. When either of the two Run commands are received by
the drive, a 5 second timer commences timing. If the run signal on TB6-24 is not received
by the drive Logic Board within 5 seconds, a shutdown occurs and this message appears.
This generally indicates a wiring problem between the control center and the drive.
VSD – SERIAL RECEIVE
This shutdown is generated when the drive logic board has not received a valid
communications packet from the control center for 10 consecutive seconds. This generally
indicates a wiring problem between the control center and the variable speed drive.
YVAM Control Center 100