Daikin EWAD Fault Code A5
Daikin EWAD Fault Code A5 is a warning alarm indicating: Compressor discharge temperature too high (inverter). The most common causes include Compression ratio too high. Estimated repair time: 2-4 hours (requires leak repair, evacuation, and refrigerant recharge). This alarm requires immediate attention by a certified HVAC technician.
Alarm Description
Compressor discharge temperature too high (inverter)
Brand: Daikin | Model: EWAD (Screw Compressor Chiller) | Code: A5 | Severity: Warning
Observable Symptoms
- Discharge temperature gauge reads above 250F (121C)
- Discharge line may be hot enough to cause burns on contact
- Compressor oil may appear dark or burnt
What to Check First
Before diving into detailed diagnostics, start with this quick first check:
Probable Causes
- Compression ratio too high
- Refrigerant shortage
- Condenser not rejecting heat
- Oil level low
Recommended Inspection Steps
- Check discharge temperature
- Verify refrigerant charge
- Inspect condenser operation
- Check oil level
Required Tools & Equipment
- Infrared thermometer or calibrated temperature probe
- Oil level sight glass inspection tool
- PT chart for refrigerant type
- Safety PPE (gloves, safety glasses, face shield)
Estimated Repair Time
2-4 hours (requires leak repair, evacuation, and refrigerant recharge)
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 A5 mean?
Fault code A5 on a Daikin EWAD chiller indicates: Compressor discharge temperature too high (inverter). This is a warning alarm that requires diagnostic attention.
What causes Daikin EWAD alarm code A5?
Common causes include: Compression ratio too high; Refrigerant shortage; Condenser not rejecting heat
How do I fix Daikin EWAD error code A5?
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.