ODU Compressor Lack Phase Protection (TS39)

Modified on Mon, 7 Apr at 10:50 AM

Issue Summary

TS39 indicates that the outdoor unit has detected an issue with the compressor’s three-phase electrical input. Specifically, one or more phases may show abnormally low current or no current, which can lead to compressor failure if not addressed.

What It Means

Code: TS39
Description: Compressor phase imbalance or loss of phase (one or more phases has little or no current)
Triggered When: Three-phase sampling detects irregular or near-zero readings on one or more lines

Step-by-Step Troubleshooting Guide

Step 1: Power off the unit and wait 2 minutes before restarting.
Step 2: After restarting, check if the error code still appears.
- If NO: The issue is resolved. Unit is operating normally.
- If YES: Continue to Step 3.
Step 3: Inspect the compressor’s three-phase output wiring for any visible signs of open circuits or disconnections.
Step 4: Check both ends of the compressor connecting wires. Ensure all connections are tight and secure.
- If connections are loose or incorrect: Correct them and restart the unit.
- If connections are good: Proceed to Step 5.
Step 5: Measure the resistance across all three compressor phases.
- If resistance is not symmetrical: Replace the compressor.
- If resistance is symmetrical: Continue to Step 6.
Step 6: Replace the outdoor main PCB if all other checks pass but the error persists.

Final Outcome

If the above steps resolve the issue, the unit will resume normal operation without displaying TS39.
If the error continues after replacing parts, contact technical support for advanced diagnostics.

Need More Help?

If you're still seeing the TS39 error after completing these steps, submit a support ticket and include your unit model, what parts were checked, and any resistance readings taken.