Trane / ML Series R-410A
Trane UPPER LAMP 5-TIME BLINK error code
Trane's troubleshooting table lists this pattern as outdoor power system abnormality. The manual says the compressor stops for overcurrent protection or startup-failure protection within one minute after startup, and the condition has occurred three consecutive times.
- Urgency
- stop use
- Verified
- Jul 31, 2026
- Fix path
- Technician
What it means
Trane's troubleshooting table lists this pattern as outdoor power system abnormality. The manual says the compressor stops for overcurrent protection or startup-failure protection within one minute after startup, and the condition has occurred three consecutive times.
Urgency
Likely causes
- The compressor repeatedly stopped on overcurrent protection
- The compressor repeatedly failed startup protection
- The outdoor stop valve needs technician verification
- The inverter, compressor, or outdoor power circuit needs service
Homeowner fix
Turn the system off. Do not keep resetting it, and do not open the outdoor unit.
When to call a pro
Call a licensed HVAC technician for a 5-time blink. Tell them Trane maps it to outdoor power-system abnormality and compressor overcurrent or startup-failure protection.
This code points to compressor and electrical or inverter work - get repair quotes from contractors in your area.
Get repair quotesRepair vs replace
Outdoor power-system repairs can be significant. Compare repair with replacement if the diagnosis includes compressor or inverter replacement on an older out-of-warranty unit.
See Trane mini-splitsYour Trane model
ML Series R-410A model pages in the Trane catalog help compare this repair path with current replacement options.
For your technician
Technician note: check stop valve position and follow Trane outdoor inverter, compressor, and outdoor service diagnostics for repeated overcurrent/startup protection. Page context: Trane maps this display to the ML Series R-410A line; source: Trane MyLinkDrive NTXWMT-A111A(B) Service Manual, Section 9 Troubleshooting; display convention: match the letter U, letter P, letter P, letter E, letter R, letter L, letter A, letter M, letter P, five, letter T, letter I, letter M, letter E, letter B, letter L, letter I, letter N, and letter K marker exactly before comparing neighboring codes.
Which systems show it
ML Series R-410A
Related troubleshooting
Use the symptom guide alongside the exact display code if the unit is flashing, cycling, or showing comfort symptoms.
Related codes
Source
- Document
- Trane MyLinkDrive NTXWMT-A111A(B) Service Manual, Section 9 Troubleshooting