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General| Display | Touchscreen |
|---|---|
| Compatibility | York YK chillers |
| Control Functions | alarm management |
| Communication Protocols | MODBUS, BACnet |
| Mounting | Panel-mounted |
| Operating Temperature Range | 0°C to 50°C |
| Power Supply | 24 VAC |
Explains symbols used for hazardous situations and important notes.
Details the central processing unit and its supporting logic circuits.
Used to alter program operation or configure microboard hardware for specific applications.
Used to alter program operation or configure microboard hardware for specific applications.
Configuration options for display and thermal flow sensors.
ON/OFF inputs from relay/switch contacts, conditioned for microboard.
Locating defective components (keypad, ribbon cable, microboard) if the keypad is not responding.
Describes communication via RS-485 Modbus serial data link.
Details ACC function in microboard when VSD is used.
How the chiller controls refrigerant level based on setpoints and operating conditions.
How the VSD automatically controls oil pump speed to maintain desired oil pressure.
Senses system pressures; output is analogous voltage converted to psig or KpaG.
How thermistors are connected to the microboard and how temperature is determined.
Uses analog inputs for setpoints like current limit and leaving chilled liquid temperature.
How the hot gas valve is modulated based on load, surge conditions, or manual control.
Allows lower leaving chilled liquid setpoints and adjusts safety thresholds.
Detects surge events based on pressure differentials and applies control actions.
Detects stall noise via gas pressure pulsations and outputs analog voltage.
Describes Quick Restart and Quick Normal Start modes for faster chiller startup.
Parameters for configuring Heat Pump operation modes and safety features.
Hardware consisting of sensors and a board for monitoring motor parameters.
Procedures for verifying and performing calibration for EM starters.
Procedures for resetting safety shutdowns and performing bearing inspections.
Entry point for accessing various diagnostic tests and troubleshooting procedures.
Verifies correct configuration of microboard program jumpers and switches.
Outlines general enhancements, surge protection, and hot gas bypass improvements.
Outlines general enhancements, operator soft shutdown, and record setpoint changes.
Details ACC and surge detection enhancements, VSD tuning screen.
Details enhancements for chiller style/compressor setpoints, flow switch, and oil pump settings.
Details enhancements for Loss of Subcooler Liquid Seal Detection and Quick Start Oil Heater Control.
