To Next PageTo Next PageWhat to do if York YCAV0267E Chiller has System Fault: LOW SUCTION PRESSURE?
If your York Chiller is showing a 'System Fault: LOW SUCTION PRESSURE', there are a couple of potential causes. It could be due to a low charge, in which case you should check the subcooling. Alternatively, the transducer might be reading incorrectly; compare its reading against a gauge.
Why York YCAV0267E has no display on control panel and won't run?
If your York Chiller's control panel has no display and the unit won't run, the issue might stem from several causes: * The high voltage supply to the chiller could be missing. * A line fuse may be blown, so check the fuses. * The chiller control board could be defective, requiring replacement. * The display board itself might be defective, also requiring replacement.
What to do if my York YCAV0267E Chiller shows System Fault: HIGH OIL TEMPERATURE?
If your York Chiller displays a 'System Fault: HIGH OIL TEMPERATURE' message, it could be due to several reasons. First, the oil temperature sensor might be defective; you can check it with infrared to see if the reading is reasonable. Second, the condenser fans might not be operating or are running backward, so check the fans. Lastly, the coils could be dirty; inspect and clean them if necessary.
What causes York YCAV0267E System Fault: HIGH DISCHARGE PRESSURE?
A 'System Fault: HIGH DISCHARGE PRESSURE' in your York Chiller can arise from two primary causes. The coils might be dirty, so you should check and clean them. Alternatively, the system could be overcharged, necessitating the removal of charge and a check of subcooling.
How to resolve York YCAV0267E Chiller Fault: HIGH AMBIENT TEMPERATURE?
If your York Chiller is showing a 'Chiller Fault: HIGH AMBIENT TEMPERATURE', this could be due to two reasons: the ambient temperature is above the maximum operating limit, so check the outside air temperature. Alternatively, the ambient sensor could be defective, so check the panel display against a thermometer reading of the ambient temperature at the sensor.
How to fix York Chiller Fault: LOW AMBIENT TEMPERATURE?
If your York Chiller displays a 'Chiller Fault: LOW AMBIENT TEMPERATURE', it could be because the ambient temperature is lower than the programmed operating limit. Check the programmed cutout to determine if it is programmed correctly. It could also be that the ambient sensor is defective. Check the panel against the thermometer reading of ambient temperature.
What causes York Chiller System Fault: HIGH DISCHARGE TEMPERATURE?
A 'System Fault: HIGH DISCHARGE TEMPERATURE' on your York Chiller could be caused by a defective discharge temperature sensor, so check the sensor. Another possible cause is high superheat, so measure the superheat with gauges and a thermocouple to determine the root cause.
How to troubleshoot York YCAV0267E Chiller when line fuse blows?
If the line fuse in your York Chiller keeps blowing, it could indicate a problem with several components. The SCR diode module might be defective, so check it. Alternatively, the IGBT module could be defective, so check that as well. Other potential causes include a defective VSD logic board (replace it if necessary) or a defective SCR trigger board (also replace if needed).
What does York YCAV0267E Chiller System Fault: MOTOR CURRENT LIMITING mean?
A 'System Fault: MOTOR CURRENT LIMITING' on your York Chiller indicates that high motor current has activated the current limiting feature. This can be a normal response from the controller if the ambient temperature is high.
What to do if York YCAV0267E Chiller shows System Fault: HIGH MOTOR TEMPERATURE?
If your York Chiller displays a 'System Fault: HIGH MOTOR TEMPERATURE', it suggests high motor temperature input from one of the sensors. This can be caused by low refrigerant charge, so check the subcooling.
Outlines safety responsibilities, manual usage, and equipment misuse hazards.
Explains the meaning of danger, warning, caution, and note symbols used in the document.
Indicates revisions made to the document with a line along the left or right column.
Introduces YORK YCAV chillers and their intended use for cooling water or glycol solutions.
Details YORK's warranty policy for equipment, including coverage, exclusions, and conditions for validity.
Covers standards for safety and compliance with industry codes for YCAV chillers.
Emphasizes individual responsibility for safe rigging, lifting, operation, and maintenance of the unit.
Explains terms used to alert readers to areas of potential hazard: WARNING, CAUTION, and NOTE.
Describes limitations on application suitability, structural support, mechanical strength, and general access safety.
Details the direct drive semi-hermetic rotary twin-screw MTS compressor, its design, and operation.
Describes the high-efficiency Shell and Tube type Direct Expansion Evaporator, its construction, and working pressures.
Explains the fin and tube condenser coils, fan specifications, and construction details.
Explains the liquid-cooled, transistorized PWM inverter used for speed control of compressor motors.
Lists various optional accessories like circuit breakers, BAS interface, and condenser coil protection.
Provides guidelines for safe rigging, handling, and storage of the chiller unit, emphasizing professional rigger use.
Refers to the unit nameplate for shipping weight and notes potential variations based on configuration.
Outlines precautions for unit delivery, storage, and inspection to ensure quality and reliability.
Details the procedure for inspecting the unit upon delivery to ensure all components are present and undamaged.
Essential site requirements for optimal performance, including service access space and environmental considerations.
Guidelines for ground level and rooftop installations, including foundation and structural support.
Requirements for installing the unit in an enclosed plant room, focusing on airflow and ducting.
Specifies required clearances for unrestricted airflow, preventing re-circulation, and ensuring service access.
Describes how to install optional vibration isolators, referring to specific tables and sections.
Provides recommendations for satisfactory operation and avoiding unit damage or warranty invalidation.
Essential recommendations for safe and satisfactory unit operation, including wiring practices.
Covers electrical wiring requirements, overcurrent protection, and recommended conductor types.
Basic checks to be performed with unit power switched OFF, emphasizing lockout/tagout procedures.
Details the inspection of the unit for installation damage and necessary actions if found.
Checks for refrigerant pressure, leaks, and proper charging procedures.
Instructions for opening service valves and ensuring proper oil circulation.
Guides on checking and adding compressor oil, ensuring correct levels in oil separators.
Critical steps for initial unit startup, including heat load, programming, and checklist completion.
Presents charts showing water pressure drop versus flow rate for different YCAV models.
Provides correction factors for ethylene and propylene glycol solutions to account for increased pressure drop.
Tables detailing operating ranges for leaving water temperature, cooler flow, and air on condenser.
Detailed physical specifications for standard efficiency YCAV chillers in English units.
Wiring diagrams and data for 3-compressor power connections, including circuit breaker and terminal block options.
Provides detailed dimensional drawings and notes for the YCAV0267E/V model in English units.
Outlines the 18-month warranty for new equipment, covering defects in workmanship and materials.
Details the 1-year warranty for reciprocating compressors and 90-day warranty for reconditioned parts.
Lists conditions that will void all YORK warranties, including improper usage, unauthorized modifications, and damage.
Emphasizes continuous operation through regular maintenance and adherence to manual limitations.
Outlines daily checks for operators, focusing on unit status and ensuring no fault messages.
Provides a detailed schedule of recommended maintenance tasks by frequency: weekly, quarterly, semi-annually, annually.
Offers a systematic approach to diagnosing and resolving common problems and fault conditions.
Describes key electronic components like the keypad, display, and control board.
Explains the function and operation of the operator keypad for system control and data access.
Details the operation and control of the Variable Speed Drive (VSD) for compressors and fans.
Lists and explains software and hardware safeties and fault conditions for the VSD system.
Explains unit warnings, such as low battery, that require operator intervention.
Describes how to access and interpret system-specific operating data like temperatures and pressures.
Explains how to access and display VSD operating parameters like frequency, voltage, and current.
Explains how to access historical data for unit and system shutdowns, including fault and normal events.
Describes how to access service-related data, view I/O status, and perform basic troubleshooting.
Explains how to turn individual systems ON/OFF and reset safety lockouts.
Provides instructions for programming the chiller serial number if it's missing or needs updating.
Guides on enabling High IPLV mode, requiring a password and specific unit serial number.
Describes how to access and modify programmable values for unit configuration and factory setpoints.
Explains how to reset programmable values to their factory default settings.
Lists serial ports and circuit boards for communication with external devices.
Details analog inputs and their circuit board locations, including optional sensors.
Lists digital inputs and their circuit board locations, referencing common return/ground.
Lists analog outputs and their circuit board locations, feeding signals to control devices.
Lists digital outputs and their plug/terminals, indicating signal levels and references.
Explains ISN communications with MicroGateway and data transmission details.
Lists and explains fault and inhibit codes for ISN operational status.
Classifies status codes by unit/system type and the board generating the status.
Explains how to use the Status Key to view chiller and system operational status messages.
Describes how to access and display unit temperatures, VSD data, and other operating information.
Explains how to reset the actual current limit setpoint remotely via analog input.
Details how to set the local current limit setpoint for preventing motor overload.
Explains how to set sound limit setpoints based on time of day or remote inputs.
Guides on programming the unit's date, time, and daily/holiday schedules.
Explains how to use the Manual Override key for emergencies or servicing.
Details how to initiate printouts of operating data, history buffers, or specific fault data.
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