Daikin AGZ Fault Code E25
Daikin AGZ Fault Code E25 is a warning alarm indicating: Liquid line solenoid valve fault. The most common causes include Solenoid valve coil failure. Estimated repair time: 1-2 hours. This alarm requires immediate attention by a certified HVAC technician.
Alarm Description
Liquid line solenoid valve fault
Brand: Daikin | Model: AGZ (Modular Scroll Chiller) | Code: E25 | 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
- Solenoid valve coil failure
- Valve stuck open or closed
- Wiring to solenoid damaged
Recommended Inspection Steps
- Check solenoid coil resistance
- Test solenoid valve operation
- Inspect wiring
- Replace solenoid valve if faulty
Required Tools & Equipment
- Coil cleaning brush and coil cleaner
- Digital multimeter
- Oil level sight glass inspection tool
- Safety PPE (gloves, safety glasses, face shield)
- Wire tracing and continuity tester
Estimated Repair Time
1-2 hours
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 AGZ codes that may be related:
OEM Service Manual Reference
OEM Reference: Daikin AGZ Modular Scroll Chiller Service Manual. Available through Daikin Applied technical support.
Frequently Asked Questions
What does Daikin AGZ fault code E25 mean?
Fault code E25 on a Daikin AGZ chiller indicates: Liquid line solenoid valve fault. This is a warning alarm that requires diagnostic attention.
What causes Daikin AGZ alarm code E25?
Common causes include: Solenoid valve coil failure; Valve stuck open or closed; Wiring to solenoid damaged
How do I fix Daikin AGZ error code E25?
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.