JOHNSON CONTROLS
90
FORM 161.01-OM1
ISSUE DATE: 6/8/2018
SECTION 3 - OPTIVIEW™ CONTROL CENTER FUNCTIONS AND NAVIGATION
DISPLAY MESSAGES
The Status Bar of the Display contains a Status Line
and, beneath it a Details Line. The Status Line contains
a message describing the operating state of the chill-
er; whether it is stopped, running, starting or shutting
down. The Details Line displays Warning, Cycling,
Safety, Start Inhibit and other messages that provide
further details of the Status Bar messages. The Status
Messages listed below are displayed on the Status Line.
All other messages are displayed on the Details Line.
For convenience they are listed in alphabetical order.
To aid in the meaning of the message, messages are
displayed in different colors as follows:
• Normal Operation messages - Green
• Warning messages - Yellow
• Cycling Shutdown messages - Orange
• Safety Shutdown messages - Red
Warning messages will scroll between all those stand-
ing. Shutdowns will show first occurrence.
TABLE 5 -
STATUS MESSAGES
MESSAGE
DESCRIPTION
CYCLING SHUTDOWN –
AUTO RESTART
The chiller is shut down on a CYCLING shutdown. The cause of the shutdown is still in effect and
is displayed on the Details line of the Status Bar. The chiller will automatically restart when the
CYCLING condition clears.
MBC STARTUP
A chiller start has been initiated. The MBC conditions are verified and transitional to levitate
the driveline rotor (MBC Levitation Mode). The progress of the MBC startup is described in the
Details Line of the Status Bar.
SAFETY SHUTDOWN –
MANUAL RESTART
The chiller is shut down on a SAFETY shutdown. The cause of the shutdown is still in effect and
is displayed on the Details line of the Status Bar. The chiller can be started after the Safety con-
dition clears and the Operator presses the CLEAR FAULT key.
SOFT SHUTDOWN
The chiller is performing a Soft Shutdown. Simultaneously, the Hot Gas Bypass Valve is com-
manded to 100% open (if Hot Gas Bypass is Enabled), the compressor VGD commanded to close
rapidly. The motor drive speed is slowed from its initial speed to the minimum required to prevent
surge. Then the motor drive speed is ramped to 0 Hz. The chiller then transitions to coastdown.
Soft Shutdown in initiated by the following:
• Leaving Chilled Liquid – Low Temperature
• Local Panel Stop Key
• Remote Stop
• Any MBC Fault occurs
• Multi-Unit Cycling – Contacts Open
• System Cycling – Contacts Open
• Control Panel – Schedule
• "Condenser – Flow Switch Open" fault active
• "Chilled Liquid – Flow Switch Open" fault active
• "Expansion I/O – Serial Communications" fault active
If the local panel safety stop switch is pressed or any chiller shutdown faults other than those
listed above occur, Soft Shutdown is immediately terminated and a System Coastdown will oc-
cur.
START INHIBIT
The chiller is prevented from being started due to the reason displayed on the Details Line of the
Status bar.
SYSTEM COASTDOWN
The chiller has shut down and removed the run signal from the motor variable speed drive
(VSD). The system is waiting for confirmation that the driveline has stopped rotating. When the
MBC and VSD report drive frequency of 0Hz for 5 seconds, coastdown is considered completed.
Then, after 60 seconds delay the VSD Precharge command is released.
SYSTEM READY TO
START
The chiller is shut down but will initiate start upon receipt of a Local or Remote start signal. The
Magnetic Bearing Controller (MBC) does not have the driveline rotor levitated. The Hot Gas
Bypass Valve position (if present) is set to the programmed Hot Gas Startup Position. The Level
Control Valve position is set to the programmed Condenser Level Control Valve Startup Position.
The VGD driven to the programmed VGD Startup Position.
SYSTEM RUN
The chiller is running under the condition described in the Details Line of the Status Bar.
SYSTEM STOPPED
The chiller is shutdown with a prevailing stop command.
Summary of Contents for YZ MODEL A
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