JOHNSON CONTROLS
32
FORM 160.00-O4
ISSUE DATE: 07/31/2019
SECTION 3 - SAFETY SHUTDOWNS
MESSAGE
DESCRIPTION
VSD - High Converter
Heatsink Temperature
HIGH CONVERTER HEATSINK TEMP
A thermistor sensor is located on the copper chill plate of the OSCD Power Unit. If
at anytime this thermistor detects a temperature of 170°F (76°C) or higher a shut-
down will occur. The cooling fans and coolant pump on the OSCD will continue to
run after the shutdown until the thermistor temperature has dropped below 160°F
(71°C), and below the reset threshold value for the inverter listed in the table below
for a given model, This shutdown requires a manual reset via the Reset push-
button on the OSCD logic board.
DRIVE MODEL
DRIVE HP RATING
THRESHOLD
RESET VALUE
LVD, VSD
270, 292, 351, 385, 419,
424, 503, 608, 658, 704,
790, 868, 882, 900, 914,
917, 948, 1055
170°F (77°C)
LVD
546, 575, 750
175°F (79°C)
LVD
1100
222°F (105°C)
VSD - High Inverter Baseplate
Temperature (270, 292, 351
and 424 Hp drives)
HIGH INVERTER BASEPLATE
TEMPERATURE FLT
A thermistor sensor is located inside the transistor module on the OSCD power
unit. If at anytime this thermistor detects a temperature of 175°F (79°C) or higher a
shutdown will occur. The cooling fans and coolant pump on the OSCD will con-
tinue to run after the shutdown until the thermistor temperature has dropped below
165°F (74°C), and the converter temperature is below 160°F (71°C). This shut-
down requires a manual reset via the Reset push-button on the OSCD logic board.
VSD - High Phase (X) Inverter
Baseplate Temperature (on
models where 3 transistors
modules are used)
HIGH PHASE (X) BASEPLATE
TEMPERATURE FAULT
The X will indicate
the phase that the
high temperature
has occurred.
A thermistor sensor is located inside each
transistor module on the OSCD power unit.
If at anytime this thermistor detects a
temperature above the shutdown threshold
value listed in the table below for a given
model, a shutdown occurs. The cooling fans
and coolant pump(s) on the OSCD will
continue to run after the shutdown until the
temperature of the converter is less than
160°F (71°C), and the inverter temperature
is less than the reset threshold value listed
in the table below for a given model. This
shutdown requires a manual reset via the
Reset push-button on the OSCD logic
board.
DRIVE
MODEL
DRIVE HP RATING
THRESHOLD
SHUTDOWN
VALUE
THRESHOLD
RESET VALUE
LVD, VSD
385, 419, 503
175°F (79°C)
170°F (77°C)
608 (575 VAC)
LVD, VSD
608 (400 VAC), 658, 704,
790, 868, 882, 900,
914, 917, 948, 1055
196°F (91°C)
LVD
546, 575
190°F (88°C)
175°F (79°C)
LVD
750
210°F (99°C)
LVD
1100
232°F (111°C)
222°F (105°C)
TABLE 3 -
SAFETY SHUTDOWNS (CONT'D)
Summary of Contents for VSD 292
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