Daikin WME Fault Code H0
Daikin WME Fault Code H0 is a warning alarm indicating: Temperature sensor fault. The most common causes include Sensor failure. Estimated repair time: 30-60 minutes (requires sensor replacement and calibration verification). This alarm requires immediate attention by a certified HVAC technician.
Alarm Description
Temperature sensor fault
Brand: Daikin | Model: WME (Water-Cooled Screw Chiller) | Code: H0 | Severity: Warning
Observable Symptoms
- Temperature reading on controller display shows abnormal value or dashes
- Chiller may not start or cycles erratically due to incorrect temperature input
What to Check First
Before diving into detailed diagnostics, start with this quick first check:
Probable Causes
- Sensor failure
- Wiring damaged
- Inconsistent readings
Recommended Inspection Steps
- Identify sensor
- Measure resistance
- Check wiring
- Replace sensor
Required Tools & Equipment
- Digital multimeter
- Infrared thermometer or calibrated temperature probe
- Safety PPE (gloves, safety glasses, face shield)
- Wire tracing and continuity tester
Estimated Repair Time
30-60 minutes (requires sensor replacement and calibration verification)
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 H0 mean?
Fault code H0 on a Daikin WME chiller indicates: Temperature sensor fault. This is a warning alarm that requires diagnostic attention.
What causes Daikin WME alarm code H0?
Common causes include: Sensor failure; Wiring damaged; Inconsistent readings
How do I fix Daikin WME error code H0?
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.