York YCAL Fault Code HC
York YCAL Fault Code HC is a warning alarm indicating: Compressor capacity control fault. The most common causes include Capacity control solenoid valve failure. Estimated repair time: 30-60 minutes (requires sensor replacement and calibration verification). This alarm requires immediate attention by a certified HVAC technician.
Alarm Description
Compressor capacity control fault
Brand: York | Model: YCAL (Air-Cooled Scroll Chiller) | Code: HC | Severity: Warning
Observable Symptoms
- Controller displays alarm code and description
- Chiller may be locked out or running in degraded mode
- Alarm indicator light is illuminated on control panel
What to Check First
Before diving into detailed diagnostics, start with this quick first check:
Probable Causes
- Capacity control solenoid valve failure
- Slide valve position sensor fault
- Capacity control wiring damaged
Recommended Inspection Steps
- Check capacity control solenoid valve
- Verify slide valve position sensor
- Inspect wiring
- Replace solenoid or sensor
Required Tools & Equipment
- Safety PPE (gloves, safety glasses, face shield)
- Wire tracing and continuity tester
Estimated Repair Time
30-60 minutes (requires sensor replacement and calibration verification)
When to Call a Professional
- If the fault persists after completing all recommended inspection steps
- If you observe unusual noises, vibrations, or oil leaks from the compressor
- If refrigerant charge levels are outside OEM specifications and EPA-certified recovery is needed
- If electrical measurements show voltage imbalance greater than 2% between phases
- If the fault recurs immediately after reset, indicating an unresolved safety condition
- Contact an authorized York service representative for warranty-covered repairs
Related Fault Codes
Other York YCAL codes that may be related:
OEM Service Manual Reference
OEM Reference: York YCAL Air-Cooled Scroll Chiller Installation and Maintenance Manual (Form 160.00-S1). Johnson Controls/York Technical Literature.
Frequently Asked Questions
What does York YCAL fault code HC mean?
Fault code HC on a York YCAL chiller indicates: Compressor capacity control fault. This is a warning alarm that requires diagnostic attention.
What causes York YCAL alarm code HC?
Common causes include: Capacity control solenoid valve failure; Slide valve position sensor fault; Capacity control wiring damaged
How do I fix York YCAL error code HC?
Follow the recommended inspection steps below. Start with the quick check, then proceed through each step. If the fault persists after all steps, contact an authorized York service representative.