Daikin WME Fault Code E5
Daikin WME Fault Code E5 is a warning alarm indicating: Oil temperature abnormal. The most common causes include Oil cooler not functioning. 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
Oil temperature abnormal
Brand: Daikin | Model: WME (Water-Cooled Screw 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 cooler not functioning
- Bearing friction
- Oil quality degraded
Recommended Inspection Steps
- Check oil cooler
- Sample oil
- Inspect bearings
- Change oil if degraded
Required Tools & Equipment
- Infrared thermometer or calibrated temperature probe
- Oil level sight glass inspection tool
- Oil sampling kit
- 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 WME codes that may be related:
OEM Service Manual Reference
OEM Reference: Daikin WME Water-Cooled Screw Chiller Service Manual. Available through Daikin Applied technical support.
Frequently Asked Questions
What does Daikin WME fault code E5 mean?
Fault code E5 on a Daikin WME chiller indicates: Oil temperature abnormal. This is a warning alarm that requires diagnostic attention.
What causes Daikin WME alarm code E5?
Common causes include: Oil cooler not functioning; Bearing friction; Oil quality degraded
How do I fix Daikin WME 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.