HDWA-SVX002C-EN
63
Limit Conditions
The controller will automatically limit certain operating
parameters during startup and run modes to maintain
optimum chiller performance and prevent nuisance
diagnostic trips. These limit conditions are noted in the
following table.
Table 20. Limit conditions
Condition
Description
Running - Limit
The chiller, circuit, and compressor are currently running, but the operation of the chiller/compressor is being actively limited by the
controls. Further information is provided by the sub-mode.
Condenser Pressure
Limit
The circuit is experiencing condenser pressures at or near the condenser limit setting. The compressor will be unloaded to prevent
exceeding the limits.
Evaporator Refrigerant
Temperature Limit
The circuit is experiencing saturated evaporator temperatures at or near the Low Refrigerant Temperature Cutout setting. The
compressors will be unloaded to prevent tripping.
Current Limit
The compressor is running and its capacity is being limited by high currents. The current limit setting is 100% RLA (to avoid overcurrent
trips).
AFD Heat Sink
Temperature Limit
This limit will unload the chiller if the communicated heat sink temperature approaches cutout.
Demand Limit
This limit allows the customer to control the maximum power into the chiller.
Control Panel Devices and Unit-
Mounted Devices
Unit Control Panel
Safety and operating controls are housed in the unit control
paneland the starter panel. The control panel operator
interface is called Tracer
®
AdaptiView™ and is located on
an adjustable arm connected to the side of the control
panel. For more information about operating Tracer
®
AdaptiView™, refer to Tracer
®
AdaptiView™ Display for
Water-cooled Agility Chillers wih Symbio™ Operations
Guide (HDWA-SVU002*-EN). For more information on the
Symbio™ 800 controller, refer to Symbio™ 800 Controller
Installation, Operation, and Maintenance (BAS-SVX080*-
EN).
The control panel houses several other controls modules
called panel-mounted Low Level Intelligent Devices
(LLIDs), power supply, terminal block, fuse, circuit
breakers, and transformer. The inter-processor
communication (IPC) bus allows the communications
between LLIDs and the controller. Unit-mounted devices
are called frame-mounted LLIDs and can be temperature
sensors or pressure transducers. The Modbus
®
client
connection on the controller provides communication to the
TR200 AFD and to the Magnetic Bearing Controller (MBC).
These and other functional switches provide analog and
binary inputs to the control system.
User-defined Language Support
Tracer
®
AdaptiView™ is capable of displaying English text
or any of 26 other languages (27 total languages).
Switching languages is simply accomplished from a
Language Settings menu. The following languages are
available:
• Arabic (Gulf Regions)
• Chinese—China
• Chinese—Taiwan
• Czech
• Dutch
• English
• French
• French (Canada)
• German
• Greek
• Hebrew
• Hungarian
• Indonesian
• Italian
• Japanese
• Korean
• Norwegian
• Polish
• Portuguese (Portugal)
• Portuguese (Brazil)
• Russian
• Romanian
• Spanish (Europe)
• Spanish (Latin America)
• Swedish
• Thai
• Turkish
Start-up and Shutdown
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