Trane RTHB Fault Code 198
Trane RTHB Fault Code 198 is a critical safety alarm indicating: Low Oil Flow. The most common causes include 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: RTHB (Helical Rotary Chiller (Water-Cooled)) | 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
- Filter clogged
- Pump failure
- Low oil level
- Switch fault
Recommended Inspection Steps
- Check oil level
- Replace filter
- Measure pressure
- 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 RTHB codes that may be related:
OEM Service Manual Reference
OEM Reference: Trane RTHB Helical Rotary Chiller Service Manual. Available through Trane Commercial support.
Frequently Asked Questions
What does Trane RTHB fault code 198 mean?
Fault code 198 on a Trane RTHB chiller indicates: Low Oil Flow. This is a critical safety alarm that requires diagnostic attention.
What causes Trane RTHB alarm code 198?
Common causes include: Filter clogged; Pump failure; Low oil level
How do I fix Trane RTHB 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.