Trane UPPER LAMP 7-TIME BLINK error code

What it means

Trane's troubleshooting table lists this pattern as outdoor control system trouble. The service manual says the inverter PCB or outdoor PCB cannot read data in nonvolatile memory.

Urgency

Likely causes

1. The outdoor inverter or outdoor PCB cannot read stored memory data
2. The inverter PCB or outdoor PCB needs service
3. The outdoor board LED diagnostic pattern needs technician follow-up

Homeowner fix

Power cycle the system once at the breaker or disconnect if you can do that safely. Do not open the outdoor unit.

When to call a pro

Call a licensed HVAC technician if the 7-time blink returns. Tell them Trane identifies this as outdoor control system nonvolatile-memory trouble.

Repair vs replace

A board repair may be practical on a newer unit. Compare replacement if an older out-of-warranty system needs multiple outdoor electronics.

• Trane ML Series 9,000 BTU R-410A 115V (NTXWMT09A111AA / NTXSMT09A111AA)

  ML Series R-410A

• Trane ML Series 12,000 BTU R-410A 115V (NTXWMT12A111AA / NTXSMT12A111AA)

  ML Series R-410A

For your technician

Technician note: inspect outdoor board LEDs and follow Trane outdoor control-system diagnostics for inverter PCB and outdoor PCB memory/read errors. 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, seven, 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

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