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Trane Air Conditioner Error Codes

Error codes

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Troubleshooting your Trane air conditioner will require you to understand the underlying problem within your unit. More often than not, your Trane AC flashes an error code on its LED screen or remote control when the unit detects an internal problem. Decoding the meaning behind these error codes will help with the troubleshooting process.

In this article, we present the full list of error codes for your Trane air conditioner. Your AC unit may have issues with a clogged filter, faulty pressure switch, or thermostat miscommunication. Always refer to your user's manual for troubleshooting steps, or check out our guide on troubleshooting and restarting your Trane air conditioner.

Trane Error Codes

Common Fault Codes and Actions Taken

Fault Codes Meaning Action
0x01 EEPROM communication error contact service technician. Unit stops working. Action to be taken by user: Contact service technician.
0x02 Compressor failure or refrigerant leakage. Unit stops working. Action to be taken by user: Contact service technician.
0x03 Filter choke error -Clean the air filter. Unit operates as per user settings. Action to be taken by user: Clean filters.
0x04 Indoor Temp Sensor Error (Room). Thermostat Room Sensor Failure. Cool Mode Or Dry Mode: Unit Operate With Compressor Off Fan Mode: Operates As Per User Setting.
0x05 Outdoor Temp Sensor Error. Outdoor Thermostat Sensor Failure. Operates Indoor Unit And Outdoor Unit As Per User Setting. If Trane Mode Is Activated Unit Should Operate At Set Point 24 °C.
0x06 Indoor Coil Sensor Error. Indoor Thermostat Sensor Failure. Cool Mode Or Dry Mode: Unit Operates With Compressor Off Fan Mode: Operates As Per User Setting.
0x08 Communication Error between the Indoor Unit and Outdoor Unit Stop Indoor Unit And Outdoor Unit.
0x09 Thermostat/Remote Control Low battery. Operates indoor unit and outdoor unit as per user setting. Change battery.
0x0A Input Power Error. Error 10 Idu Error - Input Power Problem. Unit Stops Working. Check The Power Cord / Contact Service Technician
0x0B Fan Failure Error. IDU Error - Fan Failure. Unit Stops Working. Inspect and replace any faulty components.

Trane Split-system Error Codes

No LED light on outdoor PCB
Fault Codes Meaning
E1 Indoor PCB malfunction
E2 Anti-freezing protection
E5 Overcurrent protection
EE Storage slug
F1 Internal ambient temperature sensor malfunction
F2 Indoor pipe temperature sensor malfunction
H3 Overload of compressor
H4 Overload system
H6 No motor of indoor unit feedback
Lc Startup failure
U1 Phase current detection malfunction of compressor
U7 4-way valve conversion abnormal
UF Zero passage abnormal
UH No motor of outdoor unit feedback

LED light on outdoor PCB
Fault Codes Meaning
C5 Jump wire cap malfunction protection
E1 System high pressure protection
E2 Anti-freezing protection
E4 Compressor air exhaust high temp. protection
E5 AC overload protection
E6 Indoor and outdoor units communication malfunction
E8 Anti-high temp. protection
EU IPM temp. is too high limit/decrease frequency
F1 Indoor ambient sensor open circuit, short circuit
F2 Indoor evaporator sensor circuit open, short circuit
F3 Outdoor ambient sensor circuit open, circuit short
F4 Outdoor condenser sensor open circuit, short circuit
F5 Outdoor air exhaust sensor open circuit, short circuit
F6 Overload limit/descending frequency
F8 Overcurrent need frequency descending
F9 Air exhaust over high need frequency descending
FH Anti-freezing limit/decrease frequency
H6 Indoor unit motor no feedback
PH DC generatrix voltage
PL Low DC Bus voltage protection
U3 DC Bus voltage dips
U7 Four-way valve abnormal
U9 Outdoor unit zero-cross detection error

Multi-Split Wired Controller

Error Code Meaning
B5 Liquid Valve Temperature Sensor Open/Short circuited (Indoor Unit)
B7 Gas Valve Temperature Sensor Open/Short circuited (Indoor Unit)
DN Communication Line Disconnected/Expansion Valve Malfunction
E1 High Pressure Prevention System
E2 Anti-freezing Prevention System
E3 Low Pressure Prevention System
E4 Discharge High Temperature Prevention System
E5 Overcurrent Prevention System; Frequency Decreased
E6 Indoor and Outdoor Unit Communication Error
E7 Running Mode Issue
E8 Overload Prevention System; Frequency Decreased
E9 Water Overflow Error (Indoor Unit)
EN Intelligent Power Module (IPM) Current Prevention System
EU Intelligent Power Module (IPM) Temperature Prevention System
F1 Room Air Temperature Sensor Open/Short circuited
F2 Evaporator Temperature Sensor Open/Short circuited
F3 Ambient Temperature Sensor Open/Short circuited (Outdoor Unit)
F4 Condenser Temperature Sensor Open/Short circuited (Outdoor Unit)
F5 Discharge Temperature Sensor Open/Short circuited
F6 Overload Protection; Frequency Restricted
F8 Current Protection; Frequency Restricted
FO System Charge Shortage/Blockage Prevention/Pump Down
F9 High Discharge Temperature; Frequency Restricted
FH Anti-freezing; Frequency Restricted
H1 Defrosting
H3 Compressor Overheating Preventive
H7 Compressor Desynchronizing
H5 Intelligent Power Module (IPM) Current Protection
H6 Stalled Motor
HE Compressor Demagnetization Protection
HC Power Factor Correction (PFC)
L3 Outdoor Fan1 Error
L9 Overpower Protection
LA Outdoor Fan2 Error
LC Compressor Startup Failure
LD Compressor Phase Loss/Reversal
LE Stalling Compressor
LF Speeding
LP Indoor and Outdoor Units Unmatched
P6 Drive Board Communication Error Codes
P9 Alternate Current (AC) Contactor Error Code
PD Sensor Connection Error Code
PE Temperature Drift Error Code
PF Drive Board Temperature Sensor Error Code
PU Capacitor Charging Error Code
P5 Over Phase Current
P7 Intelligent Power Module (IPM) Temperature Tensor Open/Short Circuited
P8 Intelligent Power Module (IPM) Temperature Protection
PH Direct Current (DC) Bus Over-Voltage
PL Direct Current (DC) Bus Under-Voltage
PP Alternate Current (AC) Input Voltage Error Code
U1 Compressor Phase Current Circuit Error Code
U3 Sensor Connection Error Code
U5 Current Circuit Error Code
U7 4-Way Valve Reversing Error Code
U8 PG Motor Zero-Crossing Protection

2-Trane Mini TVR 5G Error Codes

Normal LED Displays:

  1. On Standby: LED screen displays the amount of indoor units communicating with outdoor units.
  2. On Operation: LED screen displays the frequency value of the compressor.
  3. On Defrost Setting: LED screen displays dF for defrosting.

Indoor Unit
Fault Codes Meaning
H0 Malfunction or Protection: M_Home unmatching
E0 Malfunction or Protection: EEPROM Fault
E2 Malfunction or Protection: Communication fault of the outdoor chip and the indoor chip
E3 Malfunction or Protection: Main board and IR341 not properly connected
E4 Malfunction or Protection: Outdoor unit sensor fault
E5 Malfunction or Protection: Voltage protection fault from circuit breaker
E6 Malfunction or Protection: Direct-current fan fault
E7 Malfunction or Protection: Heating fan fault in the area A lasts for 5 minutes
E8 Malfunction or Protection: There are two times E6 fault in 10 minutes (recovery will be after power off)
P0 Malfunction or Protection: The cooling fin high temperature protection
P1 Malfunction or Protection: High pressure protection
P2 Malfunction or Protection: Low pressure protection
P3 Malfunction or Protection: Compressor current protection
P4 Malfunction or Protection: Discharge temperature protection
P5 Malfunction or Protection: Outdoor condenser high temperature protection
P6 Malfunction or Protection: IPM modules protection
P7 Malfunction or Protection: Evaporator high temperature protection
P8 Malfunction or Protection: Typhoon protection

Outdoor Unit
Fault Codes Meaning
E2 Malfunction or Protection: Communication malfunction between indoor/outdoor units
E4 Malfunction or Protection: T3 and T4 temperature sensor malfunction
E5 Malfunction or Protection: Power voltage protection
E6 Malfunction or Protection: Fan Protection
E7 Malfunction or Protection: Compressor discharge temperature sensor malfunction
E9 Malfunction or Protection: EEPROM malfunction
EA Malfunction or Protection: A fan in the Aregion run for more than 5 minutes in Heat mode
Eb Malfunction or Protection: 2 times of E6 protection in 10 minutes
H0 Malfunction or Protection: Communication malfunction between IR341/main board
P1 Malfunction or Protection: Hi-pressure protection
P2 Malfunction or Protection: Low-pressure protection
P3 Malfunction or Protection: Input current protection
P4 Malfunction or Protection: Compressor discharge protection temperature
P5 Malfunction or Protection: Condenser high temperature protection
P6 Malfunction or Protection: Inverter module protection
P8 Malfunction or Protection: Typhoon protection
PE Malfunction or Protection: Indoor evaporator hi-temp protection

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