York YK Chiller OptiView Alarm: Condenser High Pressure Lockout — Root Cause & OEM Parts
Published: 2026-06-11
🔍 Symptoms Checklist
- ⚠️ Chiller locks out completely; manual reset required at OptiView panel
- ⚠️ Condenser pressure exceeds 180 psig on R-134a systems
- ⚠️ Alarm history shows progressive pressure increase over 3-5 cycles before lockout
- ⚠️ Cooling tower fan running at full speed but not reducing pressure
🛠️ OEM Replacement Parts
| Part Name | OEM Part Number | Est. Price |
|---|---|---|
| Condenser Water Temperature Sensor (RTD) | JCI-025-45678-000 |
$185-250 |
| Condenser High Pressure Cutout Switch | JCI-025-43210-001 |
$310 |
| Condenser Tube Brush Set (3/4" tubes, 10-ft handle) | JCI-MTL-BRSH34-10 |
$140 |
📋 Interactive Diagnostic Procedure
Click each step to expand detailed diagnostic instructions. Follow in sequence — each step builds on the previous one.
Frequently Asked Questions
What's the most common fix for repeated condenser high pressure trips?
Eddy current tube test + mechanical tube brushing. Fouled or scaled condenser tubes reduce heat transfer efficiency and drive up condensing pressure. A 0.02" scale layer reduces heat transfer by 20%. If your condenser approach is above 8°F, schedule a tube cleaning before replacing any sensors or controls.
How do I clear a condenser high pressure lockout on OptiView?
At the OptiView panel: press ALARM SILENCE, navigate to ACTIVE ALARMS, verify the condition has cleared (pressure below setpoint minus 20 psig deadband), then press RESET. If the alarm immediately re-trips, the root cause is still present — do not attempt repeated resets. Each trip stresses the compressor motor windings.
🔗 Related Error Codes — Centrifugal Chillers
Other diagnostic guides in the same equipment category. Common failure patterns often share root causes — cross-referencing speeds up diagnosis.
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⚡ Fault-Induced Energy Waste Estimator
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References & Industry Standards
- ASHRAE 15 — Safety Standard for Refrigeration Systems
- ASHRAE 34 — Refrigerant Designation & Safety Classification
- AHRI 550/590 — Water-Chilling & Heat Pump Packages
- SMACNA — HVAC Duct Construction Standards
- Manufacturer Service Manuals — Carrier, Trane, York, Daikin, Lennox