Trane aircon error codes & blinking lights

Search official Trane TVR Pro and TVR Ultra heat-recovery outdoor-unit diagnostic rows. Select the exact generation because shared codes can carry different meanings.

Trane error code & blinking light lookup

Choose TVR Pro or TVR Ultra, then search the code shown on the outdoor-unit digital display. Placeholder forms such as xH9, yHd, zF6, and A1w are normalized without multiplying pages.

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92 matches

Browse all 49 Trane code pagesCanonical links grouped by TVR generation coverage.

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Trane aircon error codes & blinking lights

Trane error code & blinking light lookup

E0Communication error between outdoor unitsResult 1 of 2 with this code and meaning. Expand for model and series details.

E2Communication error between indoor units and the master outdoor unit

E4Outdoor heat-exchanger T3 or outdoor ambient T4 temperature-sensor error

E5Abnormal power-supply voltageResult 1 of 2 with this code and meaning. Expand for model and series details.

E7Compressor-top or discharge-pipe T7C1/T7C2 temperature-sensor error

E8Outdoor-unit address errorResult 1 of 2 with this code and meaning. Expand for model and series details.

E9Compressor-system EEPROM mismatch

F1Compressor-system DC-bus voltage error

F6Electronic expansion-valve connection errorResult 1 of 2 with this code and meaning. Expand for model and series details.

H0Communication error between main control chip and inverter-driver chip

H2Number of slave outdoor units detected by the master has decreased

H3Number of slave outdoor units detected by the master has increased

H4Compressor-system inverter-module protection

H5Low-pressure P2 protection occurred three times in 60 minutes

H6Discharge-temperature P4 protection occurred three times in 100 minutes

H7Detected indoor-unit count does not match the count set on the main PCB

H8High-pressure sensor errorResult 1 of 2 with this code and meaning. Expand for model and series details.

H9Fan-module P9 protection occurred ten times in 120 minutes

HDSlave outdoor-unit malfunctionResult 1 of 2 with this code and meaning. Expand for model and series details.

C7Inverter-module PL temperature protection occurred three times in 100 minutes

P1Discharge-pipe high-pressure protection

P2Suction-pipe low-pressure protection

P4Discharge-temperature protection

P5Outdoor heat-exchanger temperature protection

P9Fan-module protection

PLInverter-module temperature protection

PPCompressor-discharge insufficient-superheat protectionResult 1 of 2 with this code and meaning. Expand for model and series details.

L0Inverter-module protection

L1DC-bus low-voltage protectionResult 1 of 2 with this code and meaning. Expand for model and series details.

L2DC-bus high-voltage protectionResult 1 of 2 with this code and meaning. Expand for model and series details.

L4Motor-control-engine errorResult 1 of 2 with this code and meaning. Expand for model and series details.

L5Zero-speed protectionResult 1 of 2 with this code and meaning. Expand for model and series details.

L7Phase-sequence errorResult 1 of 2 with this code and meaning. Expand for model and series details.

L8Compressor-frequency variation exceeded 15 Hz within one second

L9Actual compressor frequency differs from target by more than 15 Hz

E0Communication error between outdoor unitsResult 2 of 2 with this code and meaning. Expand for model and series details.

E2Communication error between the mode-selection unit and master outdoor unit

E4T3 or T4 temperature-sensor error

E5Abnormal power-supply voltageResult 2 of 2 with this code and meaning. Expand for model and series details.

E7Discharge-temperature sensor T7C1 error

E8Outdoor-unit address errorResult 2 of 2 with this code and meaning. Expand for model and series details.

E9Compressor EEPROM mismatch

F1DC-bus voltage error

F3T6B temperature-sensor error

F5T6A temperature-sensor error

F6Electronic expansion-valve connection errorResult 2 of 2 with this code and meaning. Expand for model and series details.

F9T5 temperature-sensor error

FAT8 temperature-sensor error

FBT9 temperature-sensor error

FCTL temperature-sensor error

FDT7 temperature-sensor error

H0Communication error between main board and compressor drive board

H2Detected outdoor-unit quantity has decreased

H3Detected outdoor-unit quantity has increased

H4Compressor inverter-module protection

H5Low-pressure protection lockout after P2 occurred three times in 60 minutes

H6Discharge-temperature protection lockout after P4 occurred three times in 100 minutes

H7Connected indoor-unit quantity mismatch

H8High-pressure sensor errorResult 2 of 2 with this code and meaning. Expand for model and series details.

H9DC fan-module protection lockout after P9 occurred ten times in 120 minutes

HBLow-pressure sensor error

HDSlave outdoor-unit malfunctionResult 2 of 2 with this code and meaning. Expand for model and series details.

C7Compressor inverter-module temperature-protection lockout after PL occurred three times in 100 minutes

P1High-pressure protection

P2Low-pressure protection

P31Primary-current protection

P32Secondary-current protection

P4Discharge-temperature or discharge-temperature-switch protection

P9DC fan-module protection

PLCompressor inverter-module temperature protection

PPCompressor-discharge insufficient-superheat protectionResult 2 of 2 with this code and meaning. Expand for model and series details.

A0Emergency stop

A1Refrigerant-leakage protection

CA2System connected only to a TVR DX AHU control box

CA3System connected only to an HT hydro module

CA4System connected only to a TVR DX AHU control box and HT hydro module

CA5TVR indoor-unit connection range exceeded

CB1TVR DX AHU control-box connection range exceeded