Daikin EWAD Fault Code E5
Daikin EWAD Fault Code E5 is a warning alarm indicating: Compressor oil temperature abnormal. The most common causes include Oil temperature too high from bearing friction. Estimated repair time: 1-2 hours (requires oil addition or oil change, filter replacement). This alarm requires immediate attention by a certified HVAC technician.
Alarm Description
Compressor oil temperature abnormal
Brand: Daikin | Model: EWAD (Screw Compressor Chiller) | Code: E5 | Severity: Warning
Observable Symptoms
- Oil sight glass shows low level or empty
- Compressor may make unusual noise from lack of lubrication
- Oil pressure differential alarm may also be active
What to Check First
Before diving into detailed diagnostics, start with this quick first check:
Probable Causes
- Oil temperature too high from bearing friction
- Oil cooler not functioning
- Oil quality degraded
Recommended Inspection Steps
- Check oil cooler operation and flow
- Sample oil for lab analysis
- Inspect compressor bearings if accessible
- Verify discharge temperature is normal
- Change oil if quality is poor
Required Tools & Equipment
- Infrared thermometer or calibrated temperature probe
- Oil level sight glass inspection tool
- Oil sampling kit
- PT chart for refrigerant type
- Safety PPE (gloves, safety glasses, face shield)
Estimated Repair Time
1-2 hours (requires oil addition or oil change, filter replacement)
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 E5 mean?
Fault code E5 on a Daikin EWAD chiller indicates: Compressor oil temperature abnormal. This is a warning alarm that requires diagnostic attention.
What causes Daikin EWAD alarm code E5?
Common causes include: Oil temperature too high from bearing friction; Oil cooler not functioning; Oil quality degraded
How do I fix Daikin EWAD error code E5?
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.