Toshiba Carrier P31 error code

What it means

The Toshiba Carrier table lists P31 as other indoor unit error. It says another indoor unit in the group is raising an alarm and points to E03, L07, L03, or L08 alarm locations.

Urgency

Likely causes

1. Another indoor unit in the group has an active alarm
2. The alarm location may be E03 communication trouble
3. The alarm location may be L03, L07, or L08 group address trouble

Homeowner fix

Check whether another indoor unit or wired controller is also showing an alarm, then power cycle once if you can do that safely. Do not change group settings.

When to call a pro

Call a licensed HVAC technician if P31 returns. Tell them Toshiba Carrier identifies P31 as another indoor unit in the group raising an alarm.

Repair vs replace

The repair decision depends on the original alarm at the other indoor unit. Most group communication and address faults are repairable.

• 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: identify the alarm location in the group and diagnose E03, L07, L03, L08, or the active code on the affected indoor unit. 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 P and thirty one 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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