Trane Mini Split 5-TIME BLINK Error Code

Updated 2026-08-30 · review status: manual-verified · reviewed by MiniSplitDecoder Editorial Team Last verified: 2026-08-30

Check your model first

  • Trane ML series (Mitsubishi-built NTXSMT/NAXSMT outdoor equivalents)

Match the model on your equipment label to the linked manufacturer documentation. The same code can mean different things across model families.

Quick answer

5-TIME BLINK on Trane mini splits means outdoor power system abnormality - the compressor stopped on overcurrent or startup-failure protection three consecutive times within a minute of starting. Trane marks this stop-use: turn the system off and do not keep resetting; this is compressor/inverter work for a technician.

Severity: high · DIY difficulty: easy

Safety

Stop at the breaker power-cycle and any plug-accessible checks (filters, remote settings, visible wiring). The outdoor unit's capacitor holds a lethal charge and the refrigerant circuit is both pressurized and (on R-32 units) flammable — opening panels or servicing the sealed system is licensed-technician work (EPA 608).

What 5-TIME BLINK means

Trane's troubleshooting table lists 5-TIME BLINK 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. This pattern maps to the stop-use end of Trane's table.

Code meaning varies by series

  • Trane ML series (Mitsubishi-built NTXSMT/NAXSMT outdoor equivalents): Outdoor unit 1-time blink every 2.5 s on the outdoor LED: overcurrent cut-out 3 consecutive times within 1 minute of compressor start - same fault surfaced indoors as the 5-time upper-lamp pattern

First checks before service

This page currently documents the safe reset triage. If the code returns, use the linked source manual or a qualified technician for code-specific diagnosis.

  1. 1. One-time fault event (power disturbance or transient sensor reading) common DIY

    Check: Power-cycle at the breaker/disconnect (or unplug for CPAP), restore, and run the system while watching for the code.

    Fix: If the code does not return after a full run cycle, the fault was transient — monitor, no repair needed.

  2. 2. Fault persists after a clean reset occasional pro only

    Check: If the code returns immediately or every session, note the conditions (startup, heating, after rain).

    Fix: A persisting code points at the component the manual assigns to this code — that repair is technician territory.

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Sources

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