Toshiba Carrier L10 error code

What it means

The Toshiba Carrier table lists L10 under outdoor unit PCB and identifies it as an outdoor PCB jumper wire, for service, setting error.

Urgency

Likely causes

1. An outdoor PCB service jumper is set incorrectly
2. Outdoor control-board setup after service is incomplete
3. The outdoor PCB needs service

Homeowner fix

Turn the system off if L10 returns. Do not open the outdoor unit or move jumpers.

When to call a pro

Call a licensed HVAC technician if L10 returns. Tell them Toshiba Carrier identifies L10 as an outdoor PCB service jumper setting error.

Repair vs replace

This is usually a setup correction. Replacement is considered only if the outdoor PCB cannot be configured or has failed.

• Toshiba Carrier 26 High Wall 12,000 BTU R-454B 208/230V (RAV-HB121KRTP-UL / RAV-BP121AT2P-UL)

  Toshiba Carrier 26 High Wall

• Toshiba Carrier 26 High Wall 18,000 BTU R-454B 208/230V (RAV-HB181KRTP-UL / RAV-BP181AT2P-UL)

  Toshiba Carrier 26 High Wall

• Toshiba Carrier 26 High Wall 24,000 BTU R-454B 208/230V (RAV-HB241KRTP-UL / RAV-BP241AT2P-UL)

  Toshiba Carrier 26 High Wall

• Toshiba Carrier 26 High Wall 30,000 BTU R-454B 208/230V (RAV-HB301KRTP-UL / RAV-BP301AT2P-UL)

  Toshiba Carrier 26 High Wall

For your technician

Technician note: inspect outdoor PCB service jumper settings, board configuration, and service replacement setup. Page context: Toshiba Carrier maps this display to the Toshiba Carrier 26 High Wall line; source: Toshiba Carrier RAV High Wall 12K-36K Installation Manual, Section 14 Troubleshooting, Error codes and parts to be checked; display convention: match the letter L and ten marker exactly before comparing neighboring codes.

Which systems show it

Toshiba Carrier 26 High Wall

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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