Trane CVHF Fault Code 198

198
Low Oil Flow
Critical
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 198 is a critical safety alarm indicating: Low Oil Flow. The most common causes include Oil filter clogged. Estimated repair time: 1-2 hours. This alarm requires immediate attention by a certified HVAC technician.

Alarm Description

Low Oil Flow

Brand: Trane  |  Model: CVHF (Hermetic Centrifugal Chiller)  |  Code: 198  |  Severity: Critical

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:

Quick Start: Check oil level

Probable Causes

  • Oil filter clogged
  • Oil pump failure
  • Low oil level
  • Pressure switch fault

Recommended Inspection Steps

  1. Check oil level
  2. Replace filter
  3. Measure pump pressure
  4. Check switch

Required Tools & Equipment

  • Oil level sight glass inspection tool
  • 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:

EDFDF5B5BA

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 198 mean?

Fault code 198 on a Trane CVHF chiller indicates: Low Oil Flow. This is a critical safety alarm that requires diagnostic attention.

What causes Trane CVHF alarm code 198?

Common causes include: Oil filter clogged; Oil pump failure; Low oil level

How do I fix Trane CVHF error code 198?

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.