Trane RTAC Fault Code F6
Trane RTAC Fault Code F6 is a critical safety alarm indicating: High Pressure Cutout - Compressor 2A. The most common causes include Condenser coil fouled. Estimated repair time: 4-6 hours (requires isolating water circuit, mechanical or chemical tube cleaning). This alarm requires immediate attention by a certified HVAC technician.
Alarm Description
High Pressure Cutout - Compressor 2A
Brand: Trane | Model: RTAC (Screw Compressor Chiller) | Code: F6 | Severity: Critical
Observable Symptoms
- Compressor shuts down on high pressure safety cutout
- Discharge pressure gauge reads above normal operating range
- Condenser may feel hot to touch or airflow feels restricted
What to Check First
Before diving into detailed diagnostics, start with this quick first check:
Probable Causes
- Condenser coil fouled
- Non-condensables
- Refrigerant overcharge
- Condenser fan failure on circuit 2
Recommended Inspection Steps
- Clean condenser coils
- Check for non-condensables
- Verify charge on circuit 2
- Test condenser fan on circuit 2
Required Tools & Equipment
- Coil cleaning brush and coil cleaner
- Oil level sight glass inspection tool
- PT chart for refrigerant type
- Safety PPE (gloves, safety glasses, face shield)
Estimated Repair Time
4-6 hours (requires isolating water circuit, mechanical or chemical tube cleaning)
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 Trane service representative for warranty-covered repairs
Related Fault Codes
Other Trane RTAC codes that may be related:
OEM Service Manual Reference
OEM Reference: Trane RTAC Air-Cooled Rotary Screw Chiller Service Manual (SVR-SVN001-EN). Available through Trane Commercial support.
Frequently Asked Questions
What does Trane RTAC fault code F6 mean?
Fault code F6 on a Trane RTAC chiller indicates: High Pressure Cutout - Compressor 2A. This is a critical safety alarm that requires diagnostic attention.
What causes Trane RTAC alarm code F6?
Common causes include: Condenser coil fouled; Non-condensables; Refrigerant overcharge
How do I fix Trane RTAC error code F6?
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 Trane service representative.