FORM 160.54-O1
19
JOHNSON CONTROLS
PROGRAMMABLE
Login
Access Level Required: VIEW
The OptiView Panel restricts certain operations based
on password entry by the operator. Three different ac-
cess levels are provided as follows: VIEW: The panel
defaults to the lowest access level which is termed
VIEW. In this mode, the chiller operating values and
setpoints can be observed, but no changes can be made.
OPERATOR: The second access level is termed OP-
ERATOR and will allow the customer to change all
of the setpoints required to operate the chiller system.
The OPERATOR access level reverts to the VIEW
level after 10 continuous minutes without a keypress.
SERVICE: In the event that advanced diagnostics are
necessary, a SERVICE access level has been provided.
Only qualied service personnel utilize this access level.
This level provides advanced control over many of the
chiller functions and allows calibration of many of the
chiller controls. The access levels are listed above in
hierarchical order beginning with the lowest level and
proceeding to the highest level. Users logged in under
higher access levels may perform any actions permitted
by lower access levels.
The OPERATOR access level is accompanied by a
10-minute timeout. After ten (10) successive minutes
without a keypress, the panel will revert to the VIEW
access level. This prevents unauthorized changes to the
chiller if a user was logged in at a higher access level
and failed to logout. Proper procedure requires that after
making necessary setpoint adjustments the user return
to the Home Screen and logout.
Logout
Access Level Required: OPERATOR
This key is displayed when a user is logged in at any
level other than VIEW. Pressing it will return the access
level to VIEW.
Print
Access Level Required: VIEW
Use this key to generate a hard-copy report of the present
system status. This provides a snapshot of the primary
operating conditions at the time the key is pressed. The
History page provides enhanced reporting capability.
(See HISTORY below.) This option will not be present
if the chiller is presently congured to log any incoming
Adaptive Capacity Control map points. (See the Adap-
tive Capacity Control Details screen.)
Message Clear
Access Level Required: SERVICE
When certain safety or cycling conditions have been
detected and the chiller has been shutdown, the main
status display of the chiller will continue to display a
message indicating the cause of the shutdown. Using
this key, the message can be cleared once the condition
has been removed.
Warning Reset
Access Level Required: OPERATOR
Use of this key acknowledges a warning condition and
resets the message display associated with it.
Soft Shutdown
(Flash Memory Card version C.MLM.01.06.xxx and
later)
Access Level Required: Operator
This key, available only when the compressor is running,
is used to initiate a Soft Shutdown. A Soft Shutdown
fully closes the Pre-rotation Vanes prior to shutting
down the compressor. This reduces bearing wear by
eliminating compressor backspin at shutdown. Press-
ing this key causes the Vanes to be driven to the fully
closed position. While the vanes are closing, “VANES
CLOSING BEFORE SHUTDOWN” is displayed on
the System Status line. When the Vane Motor Switch
(VMS) closes, indicating the vanes have fully closed (or
3.5 minutes have elapsed, whichever occurs rst), the
Run signal is removed from the compressor motor starter
and a “SYSTEM COASTDOWN” is performed. While
the vanes are closing, if a Local Stop is initiated with the
Compressor Switch or any fault other than “LEAVING
CHILLED LIQUID TEMP – LOW TEMPERATURE”,
“REMOTE STOP”, “MULTI-UNIT CYCLING – CON-
TACTS OPEN”, SYSTEM CYCLING – CONTACTS
OPEN” or “CONTROL PANEL – SCHEDULE” oc-
cur, it will immediately enter “System Coastdown”.
To restart the chiller after an operator initiated Soft
shutdown, the Compressor Switch must be placed in the
Stop/Reset position (O) and then the Start position (3).
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