Trane RTAC Fault Code 198
Trane RTAC Fault Code 198 is a critical safety alarm indicating: Low Oil Flow - Compressor 1A. The most common causes include Oil filter clogged. Estimated repair time: 1-2 hours (requires oil addition or oil change, filter replacement). This alarm requires immediate attention by a certified HVAC technician.
Alarm Description
Low Oil Flow - Compressor 1A
Brand: Trane | Model: RTAC (Screw Compressor 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:
Probable Causes
- Oil filter clogged
- Oil pump failure
- Low oil level
- Oil pressure differential switch fault
Recommended Inspection Steps
- Check compressor oil level sight glass
- Replace oil filter element
- Measure oil pump discharge pressure
- Verify oil pressure differential switch operation
- Add oil if level is low
Required Tools & Equipment
- Oil level sight glass inspection tool
- PT chart for refrigerant type
- Refrigerant manifold gauge set
- Safety PPE (gloves, safety glasses, face shield)
Estimated Repair Time
1-2 hours (requires oil addition or oil change, filter replacement)
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 RTAC codes that may be related:
OEM Service Manual Reference
OEM Reference: Trane RTAC Air-Cooled Rotary Screw Chiller Service Manual (SVR-SVN001-EN). Available through Trane Commercial support.
Frequently Asked Questions
What does Trane RTAC fault code 198 mean?
Fault code 198 on a Trane RTAC chiller indicates: Low Oil Flow - Compressor 1A. This is a critical safety alarm that requires diagnostic attention.
What causes Trane RTAC alarm code 198?
Common causes include: Oil filter clogged; Oil pump failure; Low oil level
How do I fix Trane RTAC 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.