York YS - Mechanical Specifications - System Features; Security Access and Data Logging Capabilities

16 JOHNSON CONTROLS
• Evaporator – Transducer or Temperature Sen-
sor
• Condenser – High Pressure Contacts Open
• Condenser – High Pressure
• Condenser – Pressure Transducer Out Of
Range
• Auxiliary Safety – Contacts Closed
• Discharge – High Temperature
• Discharge – Low Temperature
• Oil – High Temperature
• Oil – Low Differential Pressure
• Oil – Low Differential Seal Pressure
• Oil Or Condenser Transducer Error
• Oil – Clogged Filter
• Oil – High Pressure
• Oil – Separator – Low Level
• Control Panel – Power Failure
• Watchdog – Software Reboot
5.1 Safety shutdowns with a Solid State Starter (LCSSS)
include:
• Shutdown - Requesting Fault Data...
• High Instantaneous Current
• High Phase (X) Heatsink Temperature - Run
ning
• 105% Motor Current Overload
• Motor Or Starter – Current Imbalance
• Phase (X) Shorted SCR
• Open SCR
• Phase Rotation
6. Cycling shutdowns enunciated through the display
and the status bar, and consists of system status,
system details, day, time, cause of shutdown, and
type of restart required.
Cycling shutdowns with a fixed speed drive in-
clude:
• Multiunit Cycling - Contacts Open
• System Cycling - Contacts Open
• Control Panel - Power Failure
• Leaving Chilled Liquid – Low Temperature
• Leaving Chilled Liquid – Flow Switch Open
• Condenser - Flow Switch Open
• Motor Controller – Contacts Open
• Motor Controller – Loss Of Current
• Power Fault
Mechanical Specications - continued
• Control Panel – Schedule
6.1 Cycling shutdowns with a Solid State Starter (LCSSS)
include:
• Initialization Failed
• Serial Communications
• Requesting Fault Data
• Stop Contacts Open
• Power Fault
• Low Phase (X) Temperature Sensor
• Run Signal
• Invalid Current Scale Selection
• Phase Locked Loop
• Low Supply Line Voltage
• High Supply Line Voltage
• Logic Board Processor
• Logic Board Power Supply
• Phase Loss
7. Security access to prevent unauthorized change of
setpoints, to permit local or remote control of the
chiller, and to allow manual operation of the prerota-
tion vanes and oil pump. Access is through ID and
password recognition, which is dened by three
different levels of user competence: view, operator,
and service.
8. Trending data with the ability to customize points of
once every second to once every hour. The panel
will trend up to 6 different parameters from a list of
over 140, without the need of an external monitoring
system.
9. The operating program is stored in non-volatile
memory (EPROM) to eliminate reprogramming the
chiller due to AC power failure or battery discharge.
Programmed setpoints are retained in lithium bat-
tery-backed RTC memory for a minimum of 11 years
with power removed from the system.
10. A fused connection through a transformer in the
compressor motor starter to provide individual
over-current protected power for all controls.
11. A numbered terminal strip for all required eld inter-
lock wiring.
12. An RS-232 port to output all system operating data,
shutdown/cycling message, and a record of the last
10 cycling or safety shutdowns to a eld-supplied
printer. Data logs to a printer at a set programmable
interval. This data can be pre-prograrnmed to print
from 1 minute to 1 day.
13. The capability to interface with a building automation