FORM
4. PRINT KEYS
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4.1GENERAL
The Print keys provide access to two sets of information either locally on the panel display or, if an optional printer is connected, remotely as hard copy printouts.
The Operating Data (Oper Data) key provides a real- time list of system operating data and programmed settings. The History key provides a comprehensive list of operating data and programmed settings “at the instant of fault” on each of the last six faults.
4.2OPER DATA KEY
If a remote printer is not connected, pressing the Oper- ating Data key allows the user to scroll through infor- mation, on the 40 character display, which is not directly available from the Display keys on the panel.
If a remote printer is connected, pressing the Operating Data key causes a snapshot to be taken of system oper- ating conditions and of the user programming selections. The data is stored in temporary memory, then transmitted from the microprocessor to the remote printer. As the data is transmitted it is erased from the memory.
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Information available using the Operating Data key is de- scribed in the following sections. In example displays “ # ” is used to indicate system number where appropriate.
4.3OPERATING DATA –
LOCAL DISPLAY MESSAGES
YCAS 2 System Models :
When the Operating Data key is pressed, the following message appears:
O P E R A T I N G D A T A
D I S P L A Y S
Repetitively pressing the keys will scroll through the following Common (whole chiller) Data and indi- vidual System Data information displays.
Common Data:
L O A D | T | I M E R | 1 0 | S E C |
U N L O A D | T | I M E R | 0 | S E C |
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This message shows the time remaining on the Load Timer and the Unload Timer. These Timers constantly recycle and are used in conjunction with “rate control” and “temperature deviation from setpoint” to determine when loading/unloading should occur.
YORK INTERNATIONAL | 149 |
