York 00497VIP Systems Screen, System Status, Locked Out LED, Discharge Pressure, Oil Pressure

SYSTEMS SCREEN

OVERVIEW

This screen is accessed from the Unit Screen. A chiller can consist of separate refrigerant circuits. Each refrigerant circuit is referred to as a system. This screen shows system specific information for each of the unit’s refrigerant systems. This information can vary according to the type of chiller. Reference the chiller’s Installation, Operation, Maintenance Manual (IOM) for details.

DISPLAY ONLY

System Status

Displays this refrigerant systems operational status. The messages displayed include running status, cooling demand, fault status, external cycling device status, load limiting, and antirecycle timer status. The status message that is displayed on the Unit’s microprocessor is represented here.

System Run (LED)

Displays this refrigerant systems operational status. Is ON when the system is running.

Locked Out (LED)

Is ON when a system is locked out on a fault requiring a manual reset at the chiller or condenser unit micro panel.

System Run Time

Displays the amount of time the system has run.

Temperatures and pressures are either measured directly by transducers and temperature sensors, or computed from these measurements. Depending on the type of chiller, the following temperatures and pressures could be displayed:

• Discharge Pressure	• Oil Pressure
• Suction Pressure	• Oil Temperature
• Discharge Temperature	• Suction Superheat

•Saturated Discharge Temperature

•Discharge Superheat

•Suction Temperature

•Saturated Suction Temperature

Motor Current (%FLA)

This displays the motor current of the system in percent of full load amps.

Slide Valve Step (If screw)

This indicates the compressor slide valve step.

Compressors Running
(If more than one compressor per circuit)
Indicates the number of compressors running
Load Limit Stage
Indicates which stage of Load Limiting a unit is in.
Load Stage
Indicates the number of solenoids on the compressor of
a YCAR unit that are de-energized and loaded.
Condenser Fan Stage
Displays the stage of condenser fan operation on the
system.
Cooler Inlet Refrigerant temperature (Only if in
R-407c mode)
Displays the refrigerant temperature at the inlet of
the cooler.	3
Liquid Line Solenoid (LED)
Is ON when the Liquid Line Solenoid Valve is energized/
open.
Economizer Solenoid (LED)
Is ON when the economizer Thermal Expansion Valve
Solenoid is energized/open.
Oil Cooling Solenoid (LED)
Is ON when the Oil Cooling Solenoid Valve is energized/
open.
Compressor Heater (LED)
Is ON when the compressor heater is on.
Hot Gas Bypass (LED)
Is ON when the hot gas bypass valve is open.

PROGRAMMABLE

None

NAVIGATION

Home

Causes an instant return to the Home Screen.

Unit Data

Causes an instant return to the Unit Screen of the selected unit.

System #

A detailed view of the specified (#) system information.