Johnson Controls YORK YVAM 0350, Руководство по эксплуатации и техническому обслуживанию

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Display messages
The Status Bar of the display contains a Status Line and, beneath it a Details Line. The Status Line
contains a message that describes the operating state of the chiller, for example if 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 in Table 85 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 the following colors:
• Normal operation messages: green
• Warning messages: yellow
• Cycling shutdown messages: orange
• Safety shutdown messages: red
Warning messages scroll between all those standing. Shutdown messages show on first
occurrence.
Status messages
Table 85: 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 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.
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
condition clears and the Operator presses the Clear Fault button.
SOFT SHUTDOWN
The chiller is performing a Soft Shutdown. Simultaneously, the Hot Gas Bypass Valve is
commanded 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 is 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 occur.
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 0 Hz for 5 seconds, coastdown is considered
completed. Then, after 60 seconds delay the VSD Precharge command is released.
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