JOHNSON CONTROLS
21
SECTION 3 - CYCLING SHUTDOWNS
FORM 160.00-O10
ISSUE DATE: 8/24/2020
3
MESSAGE
DESCRIPTION
VSD – LOW PHASE C INPUT
BASEPLATE TEMPERATURE
See “VSD – LOW PHASE A INPUT BASEPLATE TEMPERATURE” message preceding.
VSD – LOW PHASE A MOTOR
BASEPLATE TEMPERATURE
The OptiView panel will determine this fault when the temperature of the motor base-
plate phase A has decreased below the low limit of 37°F (2.7°C). All phase temperatures
have to increase above the fault-reset threshold of 42°F (5.5°C), for this fault to be
cleared. The cooling fans and pumps will turn on while this shutdown is present. They will
turn off when the temperature rises above the fault-reset threshold.
VSD – LOW PHASE B MOTOR
BASEPLATE TEMPERATURE
See “VSD – LOW PHASE A MOTOR BASEPLATE TEMPERATURE” message preceding.
VSD – LOW PHASE C MOTOR
BASEPLATE TEMPERATURE
See “VSD – LOW PHASE A MOTOR BASEPLATE TEMPERATURE” message preceding.
VSD – NOT RUNNING
The OptiView panel will determine this fault when the VSD has not reported run state via
serial communications for 8 seconds while the microboard issues a VSD run command.
The fault is released when the microboard command is “Stopped State”.
VSD – PHASE A INPUT DCCT
OFFSET
When the VSD begins precharge, the output of the input current Direct Current Cur- rent
Transformers (DCCT) are evaluated to ensure that they are reading zero current when no
current is flowing through the DCCT. If the zero current output value is above a threshold,
then this shutdown is generated.
VSD – PHASE B INPUT DCCT
OFFSET
See “VSD – PHASE A INPUT DCCT OFFSET” message preceding.
VSD – PHASE C INPUT DCCT
OFFSET
See “VSD – PHASE A INPUT DCCT OFFSET” message preceding.
VSD – PHASE A INPUT GATE
DRIVER
The gate driver board for the input rectifier monitors the power supplies within the gate
driver circuit, and verifies that the input rectifier can be properly controlled. If the gate
driver monitor determines that the input rectifier cannot be properly controlled, then the
drive will shut down and display this message.
VSD – PHASE B INPUT GATE
DRIVER
See “VSD – PHASE A INPUT GATE DRIVER” message preceding.
VSD – PHASE C INPUT GATE
DRIVER
See “VSD – PHASE A INPUT GATE DRIVER” message preceding.
VSD – PHASE A MOTOR
GATE DRIVER
The gate driver board for the motor inverter monitors the power supplies within the gate
driver circuit, and verifies that the input rectifier can be properly controlled. If the gate
driver monitor determines that the input rectifier cannot be properly controlled, then the
drive will shut down and display this message.
VSD – PHASE B MOTOR
GATE DRIVER
See “VSD – PHASE A MOTOR GATE DRIVER” message preceding.
VSD – PHASE C MOTOR
GATE DRIVER
See “VSD – PHASE A MOTOR GATE DRIVER” message preceding.
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 table below) 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 (VOLTS)
380/415
41
460
50
TABLE 3 -
CYCLING SHUTDOWN MESSAGE (CONT'D)
