Table 2 - Status Messages - York OPTIVIEW Operation Manual

SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
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.

TABLE 2 - STATUS MESSAGES

MESSAGE
CYCLING SHUTDOWN –
AUTO RESTART
MBC STARTUP
SAFETY SHUTDOWN –
MANUAL RESTART
SOFT SHUTDOWN
START INHIBIT
SYSTEM COASTDOWN
SYSTEM READY TO
START
SYSTEM RUN
SYSTEM STOPPED
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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.
A chiller start has been initiated so the VSD is commanded to precharge to raise VSD DC bus
voltage to power up the Magnetic Bearing Controller (MBC). Then MBC conditions are verified
and transitioned to levitate the driveline rotor (MBC Levitation Mode). The progress of the MBC
startup is described in the Details Line of the Status Bar.
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.
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 Prerotation Vanes (PRV)
are commanded to the programmed PRV Shutdown Position and the Level Control Valve is
commanded to 100% open. The motor drive speed is slowed from its initial speed to the mini-
mum 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
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 occur.
The chiller is prevented from being started due to the reason displayed on the Details Line of the
Status bar.
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. DC power for the Mag-
netic Bearing Controller (MBC) will cease.
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 Prerotation Vanes (PRV) are driven to the programmed PRV Startup Position.
The chiller is running under the condition described in the Details Line of the Status Bar.
The chiller is shutdown with a prevailing stop command.
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. For mes-
sages specific to the Variable Speed Drive, refer to the
applicable YMC Variable Speed Drive Service (Form
2
160.78-M3).
DESCRIPTION
FORM 160.78-O2
ISSUE DATE: 5/22/2017
JOHNSON CONTROLS