York YR User Manual download pdf (Page 11)

YORK INTERNATIONAL

FORM 160.81-EG1

collecting the data, but the oldest data drops off the

graph from left to right at the next data collection inter-

val. For ease of identification, each plotted parameter,

title and associated Y-axis labeling is color coordinated.

Display Only:

• This screen allows the user to view the graphical

trending of the selected parameters and is a gate-

way to the graph setup screens.

Programmable:

• Start

• Stop

• y-axis

• x-axis

The TREND SETUP screen is used to configure the

trending screen. The parameters to be trended are se-

lected from the Trend Common Slots screen, accessed

from the Slot Numbers button or the Master Slot Num-

bers List found in the Operating Manual. The interval at

which all the parameters are sampled is selected under

the Collection Interval button. The data point minimum

and maximum values may be adjusted closer to in-

crease viewing resolution.

Programmable:

• Chart Type (select continuous or one screen)

• Collection Interval

• Select

• Data Point Slot Number (1 - 6)

• Data Point Min. (1 - 6)

• Data Point Max (1 - 6)

The TREND COMMON SLOTS screen displays the

Master Slot Numbers List of the monitored parameters.

Display Only:

• Slot Numbers

Programmable:

• Page Up

• Page Down

• Print

DISPLAY MESSAGES

The Control Center continuously monitors the operat-

ing system, displaying and recording the cause of any

shutdowns (Safety, Cycling or Normal). The condition

of the chiller is displayed at the System Status line that

contains a message describing the operating state of

the chiller; whether it is stopped, running, starting or

shutting down. A System Details Line displays Warn-

ing, Cycling, Safety, Start Inhibit and other messages

that provide further details of the Status Bar messages.

Messages are color-coded: Green – Normal Operations;

Yellow – Warnings; Orange – Cycling Shutdowns; and

Red – Safety Shutdowns to aid in identifying problems

quickly.

Status messages include:

• System Ready To Start

• Cycling Shutdown – Auto Restart

• Safety Shutdown – Manual Restart

• Start Sequence Initiated

• System Run (with countdown timers)

• Start Inhibit

• Slide Valve Closing Before Shutdown

• System Lockout Delay

Run Messages include:

• Leaving Chilled Liquid Control

• Motor Pulldown Limit

• Motor – High Current Limit

Start Inhibit Messages include:

• Anti-Recycle XX min/sec.

• Slide Valve – Position >30%

• Motor Current >15% FLA

• LCSSS – High-Temperature Phase X - Stopped

Warning Messages include:

• Real Time Clock Failure

• Setpoint Override

• Condenser – High Pressure Limit

• Evaporator – Low Pressure Limit

• Freeze Threat From Operating Chiller

• Freeze Threat, Condenser Flow Switch Open

• Low Discharge Superheat Limit

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York YR User Manual Page 11

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