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SECTION 36 - SOFTWARE ENHANCEMENTS
FORM 160.54-M1
ISSUE DATE: 10/25/2019
JOHNSON CONTROLS
JCI COMPANY CONFIDENTIAL
36
GENERAL
Beginning March 2002, an enhanced flash memory card
will be supplied in new production YK NEMA 1-4 and
CE chillers. The new features are outlined below.
The flash memory card versions and part numbers are
as follows:
• NEMA 1-4 chillers (except
P
compressors)
C.MLM.01.06.100 (031-01797-001)
• CE chillers (except
P
compressors)
C.MLM.01.06.200 (031-01797-002)
• NEMA 1-4 chillers (
P
compressors)
C.MLM.04.02.100 (031-02073-001)
• CE chillers (
P
compressors) C.MLM.04.02.200
(031-02073-002)
These versions are also available from the Baltimore
Parts Distribution Center for retrofit to existing chillers.
OPERATOR SOFT SHUTDOWN
This feature allows an operator (logged in at OPER-
ATOR access level, or higher) to manually initiate a
soft shutdown by closing the pre-rotation vanes before
shutting down the chiller, which reduces compressor
bearing wear by eliminating compressor backspin at
shutdown.
While the chiller is running, a SOFT SHUTDOWN key
is available on the HOME screen (when access level is
OPERATOR or higher). Pressing this key causes the
pre-rotation vanes to be driven fully closed. While
they are closing, VANES CLOSING BEFORE SHUT-
DOWN is displayed on the system status line. LOCAL
STOP is displayed on the system details line. When the
Vane Motor Switch (VMS) closes, indicating the vanes
have fully closed (or 3.5 minutes have elapsed, which-
ever occurs first), the start signal is removed from the
starter and a normal coastdown is performed.
While the vanes are closing during the soft shutdown,
if a standard local stop is initiated with the front panel
rocker switch, or if any faults other than the following
occur, the soft shutdown is terminated and it will im-
mediately enter a normal coastdown period:
• Leaving Chilled Liquid – Low Temperature
• Remote Stop
• Multi-unit Cycling – Contacts Open
SI0019 - SOFTWARE ENHANCEMENTS EFFECTIVE MARCH 2002
• System Cycling – Contacts Open
• Control Panel – Schedule
Following an operator initiated soft shutdown, the front
panel rocker switch must be placed in the stop/reset po-
sition and then to the start position in order to start the
chiller after a soft shutdown has been performed.
RECORD SETPOINT CHANGES
This feature provides a record of the last 75 setpoint
changes. The date and time the setpoint was changed,
the new setpoint value and the access level and User ID
used to make the change are stored in the BRAM. The
SECURITY LOG screen and the SECURITY LOG
DETAILS screen display levels of this information.
Both screens are available in SERVICE access level
or higher.
On the SECURITY LOG screen, accessible from the
HISTORY screen, the setpoint, setpoint category and
new setpoint value are listed and numbered in reverse
order in which they were changed. The most recent is
listed as number 1; the next most recent as number 2,
etc. A PRINT key allows printing this entire list. Since
15 changes can be displayed at one time, multiple
pages could be necessary to display all the changes.
PAGE-UP and PAGE-DOWN keys are provided to
view the entire list. To view the details of a particu-
lar setpoint change, select the setpoint change number
with the LOG ENTRY key, and then press the VIEW
DETAILS key, which moves it to the SECURITY LOG
DETAILS screen.
The SECURITY LOG DETAILS screen, accessible
from the SECURITY LOG screen, displays the fol-
lowing setpoint change details. The setpoint is selected
from the list on the SECURITY LOG screen as ex-
plained in the previous paragraph. A PRINT key is pro-
vided to print this information.
• Setpoint Category
• Setpoint
• Date and time of change
• Access Level and User ID used to make the change
• Old Value
• New Value
