Lennox SCA Fault Code E29
Lennox SCA Fault Code E29 is a warning alarm indicating: Condensate level high. The most common causes include Condensate drain blocked. Estimated repair time: 1-2 hours. This alarm requires immediate attention by a certified HVAC technician.
Alarm Description
Condensate level high
Brand: Lennox | Model: SCA (Air-Cooled Scroll Chiller) | Code: E29 | 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
- Condensate drain blocked
- Condensate pump failure
- Condensate level switch fault
Recommended Inspection Steps
- Check condensate drain for blockage
- Verify condensate pump operation
- Test condensate level switch
- Clear drain or replace pump
Required Tools & Equipment
- Digital multimeter
- OEM service manual
- Safety PPE (gloves, safety glasses)
- Safety PPE (gloves, safety glasses, face shield)
Estimated Repair Time
1-2 hours
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 Lennox service representative for warranty-covered repairs
Related Fault Codes
Other Lennox SCA codes that may be related:
OEM Service Manual Reference
OEM Reference: Lennox SCA Air-Cooled Scroll Chiller Service Manual. Available through Lennox Commercial technical support.
Frequently Asked Questions
What does Lennox SCA fault code E29 mean?
Fault code E29 on a Lennox SCA chiller indicates: Condensate level high. This is a warning alarm that requires diagnostic attention.
What causes Lennox SCA alarm code E29?
Common causes include: Condensate drain blocked; Condensate pump failure; Condensate level switch fault
How do I fix Lennox SCA error code E29?
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 Lennox service representative.