Daikin WME Fault Code E16
Daikin WME Fault Code E16 is a warning alarm indicating: Evaporator approach temperature high. The most common causes include Fouled evaporator tubes. Estimated repair time: 4-6 hours (requires isolating water circuit, mechanical or chemical tube cleaning). This alarm requires immediate attention by a certified HVAC technician.
Alarm Description
Evaporator approach temperature high
Brand: Daikin | Model: WME (Water-Cooled Screw Chiller) | Code: E16 | 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
- Fouled evaporator tubes
- Low refrigerant charge
- Refrigerant distribution problem
- Water flow too low
Recommended Inspection Steps
- Calculate approach temp
- Inspect tubes
- Verify charge
- Measure flow
- Clean tubes
Required Tools & Equipment
- Coil cleaning brush and coil cleaner
- Infrared thermometer or calibrated temperature probe
- PT chart for refrigerant type
- Safety PPE (gloves, safety glasses, face shield)
Estimated Repair Time
4-6 hours (requires isolating water circuit, mechanical or chemical tube cleaning)
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 E16 mean?
Fault code E16 on a Daikin WME chiller indicates: Evaporator approach temperature high. This is a warning alarm that requires diagnostic attention.
What causes Daikin WME alarm code E16?
Common causes include: Fouled evaporator tubes; Low refrigerant charge; Refrigerant distribution problem
How do I fix Daikin WME error code E16?
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.