Daikin EWAD Fault Code L6
Daikin EWAD Fault Code L6 is a critical safety alarm indicating: Inverter output phase loss. The most common causes include One phase of inverter output missing. Estimated repair time: 30-60 minutes (requires electrical power diagnostics at disconnect). This alarm requires immediate attention by a certified HVAC technician.
Alarm Description
Inverter output phase loss
Brand: Daikin | Model: EWAD (Screw Compressor Chiller) | Code: L6 | Severity: Critical
Observable Symptoms
- Phase monitor relay indicates phase loss or reversal
- Compressor may run backwards or fail to start
- Three-phase voltage readings are unbalanced
What to Check First
Before diving into detailed diagnostics, start with this quick first check:
Probable Causes
- One phase of inverter output missing
- Output terminal loose or corroded
- Inverter power module failure on one phase
Recommended Inspection Steps
- Check inverter output voltage on all three phases
- Inspect output terminal connections
- Verify inverter power module operation
- Replace inverter power module if one phase is missing
Required Tools & Equipment
- Digital multimeter
- Safety PPE (gloves, safety glasses, face shield)
Estimated Repair Time
30-60 minutes (requires electrical power diagnostics at disconnect)
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 Daikin service representative for warranty-covered repairs
Related Fault Codes
Other Daikin EWAD codes that may be related:
OEM Service Manual Reference
OEM Reference: Daikin EWAD Air-Cooled Screw Chiller Service Manual. Available through Daikin Applied technical support.
Frequently Asked Questions
What does Daikin EWAD fault code L6 mean?
Fault code L6 on a Daikin EWAD chiller indicates: Inverter output phase loss. This is a critical safety alarm that requires diagnostic attention.
What causes Daikin EWAD alarm code L6?
Common causes include: One phase of inverter output missing; Output terminal loose or corroded; Inverter power module failure on one phase
How do I fix Daikin EWAD error code L6?
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 Daikin service representative.