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Repetitively pressing the Keys allows scrolling through the information available in the Safety Shut- down buffer. This is divided into Chiller Data and Indi- vidual System Data displays as follows:
Chiller Data:
S Y S | 1 | N O F A U L T S |
S Y S | 2 | H I G H M T R C U R R |
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This message indicates the fault that caused the shut- down; in this case, a high motor current in System 2 was the cause of the shutdown.
S 1 - 1 C H I L L E D L I Q U I D
W A T E R
This message displays the type of chilled liquid selected (water or glycol) at the time of the fault.
S 1 - 2 A M B I E N T C O N T R O L L O W A M B I E N T
This display indicates whether standard or low ambient operation was selected at the time of the fault.
S 1 - 3 R E F R I G E R A N T
R - 2 2
This message indicates the type of refrigerant that was programmed at the time of the fault
S 1 - 4 | Y C A S |
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This message indicates the type of Chiller (YCAS or YCWS) programmed at the time of the fault. (MUST
BE IN YCAS MODE)
S 1 - 5 M O T O R C U R R E N T A V E R A G I N G D I S A B L E D
This message indicates whether motor current averaging at
S 1 - 6 H E A T R E C O V E R Y D I S A B L E D
This message indicates whether heat recovery is dis- abled or enabled. (HEAT RECOVERY MUST BE
DISABLED)
FORM
S 1 - 7 E X P A N S I O N V A L V E E L E C T R O N I C
This message indicates whether electronic or thermo- static expansion valve is selected. (ELECTRONIC
MUST BE SELECTED FOR EEV OPERATION). (Remote barrel applications are programmed for thermostatic).
D I S C H A R G E P R E S S U R E C U T O U T = 3 9 5 . 0 P S I G
This message indicates the discharge pressure
D I S C H A R G E P R E S S U R E U N L O A D = 3 7 5 . 0 P S I G
This display provides the discharge pressure unload point, programmed at the time of the fault.
S U C T I O N P R E S S U R E |
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C U T O U T = 4 4 . 0 P S | I G |
This message displays the suction pressure
H I G H A M B I E N T | T E M P |
C U T O U T = 1 3 0 | . 0 ° F |
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This message indicates the High Ambient Temperature Cutout at the time of the fault.
L O W A M B I E N T | T E M P |
C U T O U T = 2 5 | . 0 ° F |
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This display shows the Low Ambient Cutout pro- grammed at the time of the fault.
L E A V I N G L I Q U I D T E M P C U T O U T = 3 6 . 0 ° F
This display shows the Low Leaving Chilled Liquid Cutout programmed at the time of the fault.
H I G H M O T O R C U R R E N T U N L O A D - 1 0 0 % F L A
This message shows the programmed %FLA Motor Current Unload at the time of the fault.
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YORK INTERNATIONAL | 153 |