YORK YCAG-003 Control Board – Obsolete YCAG Series Spare Part

Technical Dossier

Product Details And Specifications

YORK YCAG-003 Control Board – Obsolete YCAG Series Spare Part

RFQ support for obsolete parts: Send the model number, required quantity and destination so DriveKNMS can confirm sourcing options before quotation.

Technical Specifications

Note: Electrical parameters specific to individual unit configurations are not published here to prevent misapplication. Contact our technical team with your unit serial number for configuration verification before ordering.

Solving the Discontinued Hardware Crisis

The YORK YCAG series was engineered for long service life, and many installations remain in productive operation 15 to 25 years after commissioning. The control board — the YCAG-003 — is the decision-making core of the chiller: it manages compressor sequencing, capacity control, refrigerant circuit protection, and fault diagnostics. There is no generic substitute. A replacement board must match the original firmware baseline and hardware revision to communicate correctly with the unit's sensors, actuators, and building management system interface.

Johnson Controls discontinued active production of the YCAG-003 as the YCAG platform reached end-of-life. OEM spare parts channels have progressively dried up. Facilities that did not establish a strategic spare parts inventory during the active production window now face a binary choice when the board fails: locate a verified aftermarket source or authorize a full system replacement. The financial and operational gap between those two options is substantial. A verified YCAG-003 sourced from DriveKNMS resolves the failure event at a fraction of the cost of system replacement and preserves the remaining service life of the chiller asset — typically extending operational continuity by 5 to 10 years without capital expenditure.

For plant managers and facility engineers operating under deferred capital budgets, this is not a minor procurement decision. It is an asset protection decision. The YCAG-003 is the single component that determines whether a functioning chiller continues to operate or becomes scrap metal.

Extending Asset Life: A Maintenance Strategy for Legacy Chiller Systems

Facilities managing YORK YCAG chillers beyond their nominal design life face a predictable set of failure modes. The control board is among the highest-consequence failure points because its failure is typically sudden and complete — unlike mechanical wear components that degrade gradually and provide warning signs. The following maintenance posture has been validated across multiple industrial and commercial facilities managing legacy chiller fleets:

2. Document firmware and hardware revision levels. Before the original board fails, photograph and record all firmware version labels, jumper configurations, and DIP switch settings. This documentation is essential for configuring a replacement board correctly and is frequently lost when the original board fails catastrophically.

3. Implement annual board-level inspection. Visual inspection for electrolytic capacitor bulging, corrosion on terminal blocks, and evidence of thermal stress on power components can identify boards approaching end-of-life before failure occurs. Boards showing early degradation should be replaced proactively, with the removed board retained as a secondary spare if it remains functional.

4. Maintain refrigerant circuit integrity. Control board failures are sometimes secondary to refrigerant-side anomalies — high discharge pressure events, liquid slugging, or sensor failures that cause the board to operate outside its design envelope. Addressing refrigerant circuit maintenance reduces stress on the control electronics.

5. Engage a qualified controls technician for commissioning. Replacement of the YCAG-003 requires proper commissioning to verify setpoint configuration, sensor calibration, and communication interface settings. Budget for this labor cost when planning spare parts procurement.

Condition & Reliability Assurance

Every YCAG-003 unit processed by DriveKNMS passes a structured 5-step quality assurance protocol before it is offered for sale:

Step 1 – Electrolytic Capacitor Inspection: All electrolytic capacitors are inspected for physical deformation, electrolyte leakage, and ESR (equivalent series resistance) deviation. Capacitors showing degradation are replaced with specification-matched components.

Step 2 – Firmware Version Verification: The firmware version present on the board is identified and documented. Boards are not offered for sale without confirmed firmware identification to prevent compatibility mismatches.

Step 3 – Pin and Connector Corrosion Assessment: All connector pins, terminal blocks, and edge connectors are inspected under magnification for oxidation, corrosion, and mechanical damage. Affected contacts are treated or the board is rejected from inventory.

Step 4 – Functional Bench Test: Where test fixtures are available for the YCAG-003, boards undergo powered functional testing to verify core logic operation prior to shipment.

Step 5 – Packaging and ESD Protection: Boards are packaged in anti-static bags with rigid protective packaging to prevent transit damage. Each shipment includes documentation of the QA steps completed.

Key Features for System Maintenance

Q: How do I verify the unit is new or quality-refurbished?
A: Each unit is shipped with a DriveKNMS QA inspection record documenting the 5-step process described above. Customers may request photographic documentation of the specific unit prior to shipment.

Q: Can DriveKNMS assist with installation and commissioning?
A: DriveKNMS provides technical documentation support and can connect customers with qualified controls technicians in their region. On-site commissioning services are available by arrangement.