York 00497VIP manual Display Messages, Status Messages, Safety Shutdown Message, Operation

Operation

DISPLAY MESSAGES

A title bar will be displayed on all screens. This title bar will contain the OptiView Remote Control Center date and time on all RCC screens. This title bar will contain the Chiller/Condensing unit’s date and time on all unit screens. On the Home Screen the message will read “YORK REMOTE CONTROL CENTER”. On all other screens it will contain the unit selected and either the chiller type or will be based on the number of compressors of that unit.

When a unit has been selected the title bar will display a dual message on every screen. The first message will display the Unit Selected in the format “Unit x”, where x is the number (1 – 8) of the unit selected. The second message will display the chiller type, whether it is a “Screw”, “Recip” or “Scroll” and the number of compressors.

On the Unit Screen and all System Screens the title bar contains another message called a Status. The current status of each unit is displayed in this message. These messages will include running status, cooling demand, fault status, external cycling device status, load limiting and anti-recycle timer status, etc. A System Status message and a Unit Status message are never displayed simultaneously. A single message is displayed for a Unit Status message, while a separate System Status message will display for each system on multi-circuit units.

Status messages fall into the categories of warning, safety, and normal with each of the categories discussed following:

•Warning messages are denoted by yellow message text. A warning message is shown for any special running condition and for all unit warnings. Any kind of load limiting would be an example of a warning message. An incorrect refrigerant programmed warning would also be an example of a warning message.

•Safety messages are denoted by red message text. A safety message is shown for any type of safety shutdown, lock-out, or run inhibit. High discharge pressure would be an example of a safety shutdown message.

•Normal messages are denoted by green text. A normal message is shown for any non-fault normal condition. The compressor running and no cooling load messages would be examples of normal messages.

Note that there are two types of shutdowns. If the chiller shuts down on a SAFETY shutdown, it requires the operator to perform a manual reset at the keypad. A NORMAL shutdown occurs from a properly requested or scheduled shutdown. The event that caused the shutdown is displayed on the Status Line.

STATUS MESSAGES

Status messages will be much like those displayed at the chiller panel. Explanation of these displays will be outlined in the Installation Manual for each specific chiller. Subtle differences may be noted in the exact wording displayed versus the display which is shown on the chiller panel. An example of this is apparent in the anti-recycle and anti-coincidence timers. In the case of these messages, the chiller control panel indicates actual time left on the timers. The OptiView Remote Control Center will only indicate that the timers are “Active”.

The new message “Loss of Communications” indicates that the communications link between the chiller control panel and the OptiView Remote Control Center has been lost. This loss of communications is normally a result of disconnecting the RS-485 communications cable between the two panels or the loss of power to the chiller control panel.

If communications is lost and not re-established, local chiller setpoints will command chiller control after 5 minutes.

In addition to the chiller status messages there are the Optiview Remote Control Center general status messages that are displayed on a single line on the Home Screen for each chiller. See the description of the Home Screen in this manual.

SAFETY SHUTDOWN MESSAGE

“WATCHDOG – SOFTWARE REBOOT”

The Microboard’s software Watchdog initiated a Microprocessor reset because it detected that a portion of the chiller operating Program was not being executed. The result of this reset is a Safety shutdown and re-initialization of the Program. This is generally indicative of a severe electrical power disturbance or impending Microboard Failure. The chiller can be started after the COMPRESSOR switch is placed in the Stop-Reset (O) position.

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