Trane CVHF Fault Code ED

ED
Evaporator Water Flow Lost
Warning
SAFETY WARNING: Commercial chillers contain high-pressure refrigerants and high-voltage electrical components (208V-4160V). Only EPA Section 608 certified technicians should perform diagnostic work. Always follow lockout/tagout procedures and wear appropriate PPE. Do not attempt repairs without proper training and equipment.
AI Summary

Trane CVHF Fault Code ED is a warning alarm indicating: Evaporator Water Flow Lost. The most common causes include Chilled water pump failure. Estimated repair time: 1-2 hours. This alarm requires immediate attention by a certified HVAC technician.

Alarm Description

Evaporator Water Flow Lost

Brand: Trane  |  Model: CVHF (Hermetic Centrifugal Chiller)  |  Code: ED  |  Severity: Warning

Observable Symptoms

  • Water flow indicator shows zero or low flow
  • Differential pressure across evaporator or condenser is low
  • Pump may not be running or making abnormal noise

What to Check First

Before diving into detailed diagnostics, start with this quick first check:

Quick Start: Verify pump running

Probable Causes

  • Chilled water pump failure
  • Flow switch fault
  • Strainer clogged
  • Air in system

Recommended Inspection Steps

  1. Verify pump running
  2. Check flow switch
  3. Clean strainer
  4. Bleed air

Required Tools & Equipment

  • Coil cleaning brush and coil cleaner
  • Safety PPE (gloves, safety glasses, face shield)

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 Trane service representative for warranty-covered repairs

Related Fault Codes

Other Trane CVHF codes that may be related:

FDF5B5BA198

OEM Service Manual Reference

OEM Reference: Trane CVHF Hermetic Centrifugal Chiller Service Manual (SVR-SVN003-EN). Available through Trane Commercial support.

Frequently Asked Questions

What does Trane CVHF fault code ED mean?

Fault code ED on a Trane CVHF chiller indicates: Evaporator Water Flow Lost. This is a warning alarm that requires diagnostic attention.

What causes Trane CVHF alarm code ED?

Common causes include: Chilled water pump failure; Flow switch fault; Strainer clogged

How do I fix Trane CVHF error code ED?

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 Trane service representative.

Disclaimer: All lookup data is for reference only. Do not use this information to replace certified professional HVAC technician judgment. Always refer to original OEM official service manual for Trane CVHF service procedures.