Having a reliable heating and cooling system is essential to maintain comfort and energy efficiency in your home. Blueridge mini split systems, known for their efficiency and relatively easy installation, can still encounter occasional issues. When problems arise, your mini split will often display an error code that can help guide troubleshooting efforts. Below, you’ll find a comprehensive list of the most common Blueridge mini split error codes for both Single Zone and Multi Zone systems. Each error code includes a brief description, possible causes, and recommended steps to resolve or further investigate the issue.
Important Note: While the tables and explanations below provide useful guidelines, always consult a qualified HVAC technician if you are uncertain about the diagnosis or if the problem persists. Improper handling of electrical or refrigerant components can cause damage and may void the manufacturer’s warranty.
Understanding Blueridge Error Codes
Before you dive into the tables, it helps to know how Blueridge mini splits communicate issues:
- Display Indicators: On some indoor units, the error code appears directly on an LED or digital display.
- Indicator Lights: Certain models show a sequence of blinking lights (e.g., “Operation” lamp, “Timer” lamp) in combination with a digital display.
- Common Themes: Most codes revolve around temperature sensor failures, refrigerant issues, communication problems, voltage irregularities, or sensor open/short circuits.
- Multi Zone Complexity: For multi-zone systems, multiple indoor units might share an outdoor unit. Error codes can indicate conflicts or issues with a specific indoor unit versus the outdoor unit.
Below, you will find two detailed tables: one for Blueridge Single Zone systems and one for Blueridge Multi Zone systems. We will then explore each error code more thoroughly to help you diagnose and address your system’s problem.
Blueridge Single Zone Mini Split Error Codes
| Error Code | Description |
|---|---|
| E1 | High pressure protection |
| E6 | Communication Error |
| E7 | (Multizone only) Mode Conflict |
| F0 | Gathering Refrigerant / Unit is low on refrigerant (Leak) |
| F1 | Indoor air sensor failure |
| F2 | Indoor coil temp sensor failure |
| F3 | Outdoor air temp sensor failure |
| F4 | Outdoor coil temp sensor failure |
| F5 | Compressor discharge temp sensor failure |
| LP | Mismatched indoor/outdoor unit |
| PL | Low voltage |
Explanations and Possible Resolutions (Single Zone)
- E1 – High pressure protection
- What It Means: The system has detected excessively high pressure in the refrigerant circuit.
- Possible Causes: Dirty condenser coils, blocked airflow around the outdoor unit, or an overcharge of refrigerant.
- Recommended Action:
- Inspect and clean outdoor coils.
- Ensure there are no obstructions (leaves, debris, or objects) around the outdoor unit.
- If the problem persists, contact an HVAC professional to check refrigerant levels and pressures.
- E6 – Communication Error
- What It Means: The indoor unit and the outdoor unit are not communicating properly.
- Possible Causes: Wiring issues (e.g., loose or damaged communication cable) or a malfunctioning control board.
- Recommended Action:
- Turn off power to the mini split, check all wiring connections between the indoor and outdoor units.
- If the wiring looks intact, a circuit board issue may be the culprit—consult a technician for advanced diagnostics.
- E7 – Mode Conflict (Multizone only)
- What It Means: Although listed under Single Zone codes in some references, this code typically appears in a multi-zone context. It indicates that two or more indoor units connected to the same outdoor unit are demanding conflicting operating modes (e.g., one is calling for cooling, while another calls for heating).
- Possible Causes: Different thermostatic settings across multiple indoor units, incorrect remote control inputs.
- Recommended Action:
- Ensure all connected indoor units are set to the same mode (cooling or heating).
- If conflict persists, power off all indoor units, then power them on one by one, making sure they are in the same mode.
- F0 – Gathering Refrigerant / Unit is Low on Refrigerant (Leak)
- What It Means: This code often appears during the pump-down process or if the system detects a potential leak leading to low refrigerant levels.
- Possible Causes: Planned refrigerant gathering process, or actual refrigerant leak.
- Recommended Action:
- Confirm if you or a technician recently activated a pump-down mode for servicing.
- Inspect the unit for signs of oil or refrigerant leakage.
- Contact a professional to recharge or repair the system if a leak is detected.
- F1 – Indoor Air Sensor Failure
- What It Means: The sensor measuring indoor ambient temperature is malfunctioning or has an open/short circuit.
- Possible Causes: Sensor wiring damage, sensor defect, or a problem with the control board.
- Recommended Action:
- Check sensor connections on the indoor unit.
- If wiring is intact, the sensor might need replacement.
- F2 – Indoor Coil Temperature Sensor Failure
- What It Means: The sensor on the indoor evaporator coil is malfunctioning or has an open/short circuit.
- Possible Causes: Damaged sensor wires, dislodged sensor, or sensor failure.
- Recommended Action:
- Examine the indoor coil area for loose or damaged sensor wires.
- Replace the coil sensor if necessary, or call a technician for advanced troubleshooting.
- F3 – Outdoor Air Temperature Sensor Failure
- What It Means: The outdoor ambient temperature sensor is not transmitting correct data or has an open/short circuit.
- Possible Causes: Exposure to the elements leading to damage, wire disconnection, or sensor defect.
- Recommended Action:
- Turn off power and inspect the sensor on the outdoor unit for physical damage.
- Replace the sensor if needed.
- F4 – Outdoor Coil Temperature Sensor Failure
- What It Means: The sensor on the outdoor condenser coil is not reading correctly or is short/open-circuited.
- Possible Causes: Damaged sensor, loose connection, or control board issues.
- Recommended Action:
- Verify sensor connections on the outdoor unit’s coil.
- If the sensor is intact, consult a technician to rule out control board failures.
- F5 – Compressor Discharge Temperature Sensor Failure
- What It Means: The sensor measuring the compressor discharge temperature is defective or has wiring issues.
- Possible Causes: Sensor burn-out due to high temperatures, wire damage, or loose connection.
- Recommended Action:
- Inspect the compressor discharge area for sensor damage.
- Replace the sensor if necessary.
- LP – Mismatched Indoor/Outdoor Unit
- What It Means: The indoor unit and outdoor unit are incompatible or not properly paired according to the manufacturer’s specifications.
- Possible Causes: Installing an indoor unit from a different model series, incorrect capacity matching.
- Recommended Action:
- Check the model numbers and ensure the indoor and outdoor units are designed to work together.
- If mismatch is confirmed, consult with the supplier or a professional installer.
- PL – Low Voltage
- What It Means: The system is detecting voltage lower than the acceptable range for normal operation.
- Possible Causes: Undersized or faulty electrical circuit, poor wiring connections, overall low supply voltage in your area.
- Recommended Action:
- Test the incoming voltage supply with a multimeter.
- Ensure you have the correct breaker size and wiring gauge.
- Contact your utility provider or an electrician if low supply voltage is an ongoing issue.
Blueridge Multi Zone Mini Split Error Codes
Multi-zone Blueridge systems often utilize both an operation lamp and a timer lamp to indicate different error states, along with codes displayed on the indoor unit. The blink patterns and code references can be more complex because multiple indoor units share a single outdoor unit. Below is a detailed table that maps the behavior of the operation lamp, the timer lamp, and the displayed code to the corresponding error information.
| Operation Lamp | Timer Lamp | Display | Error Information |
|---|---|---|---|
| 1 time | OFF | E0 | Indoor unit EEPROM parameter error |
| 2 times | OFF | E1 | Indoor / outdoor units communication error |
| 4 times | OFF | E3 | The indoor fan speed is operating outside of the normal range |
| 5 times | OFF | E4 | Indoor room temperature sensor T1 is in open circuit or has short circuited |
| 6 times | OFF | E5 | Evaporator coil temperature sensor T2 is in open circuit or has short circuited |
| 7 times | OFF | EC | Refrigerant leak detected |
| 1 time | ON | F0 | Overload current protection |
| 2 times | ON | F1 | Outdoor ambient temperature sensor T4 open circuit or short circuit |
| 3 times | ON | F2 | Condenser coil temperature sensor T3 is in open circuit or has short circuited |
| 4 times | ON | F3 | Compressor discharge temperature sensor TP open circuit or short circuit |
| 5 times | ON | F4 | Outdoor unit EEPROM parameter error |
| 6 times | ON | F5 | The outdoor fan speed is operating outside of the normal range |
| 1 time | FLASH | P0 | IPM malfunction or IGBT over-strong current protection |
| 2 times | FLASH | P1 | Over voltage or over low voltage protection |
| 3 times | FLASH | P2 | High temperature protection of IPM module |
| 4 times | FLASH | P3A | Outdoor ambient temperature too low |
| 5 times | FLASH | P4 | Inverter compressor drive error |
| 6 times | FLASH | P5 | Indoor units mode conflict (multi-zone ONLY) |
| 7 times | FLASH | P6 | Low pressure protection / High pressure protection (36k model only) / High temp protection of IPM (for <36k models) |
Explanations and Possible Resolutions (Multi Zone)
- E0 – Indoor Unit EEPROM Parameter Error
- What It Means: The system’s internal EEPROM (a memory chip) has invalid or corrupted parameters.
- Possible Causes: Electrical surges, factory defect, or corrupted firmware.
- Recommended Action:
- Try resetting power to see if the code clears.
- If it persists, a professional may need to re-flash or replace the control board.
- E1 – Indoor / Outdoor Units Communication Error
- What It Means: Similar to the Single Zone E6, it indicates a loss of communication or mismatch between indoor and outdoor units.
- Possible Causes: Loose wiring, incompatible units, or defective control boards.
- Recommended Action:
- Check wiring connections between each indoor unit and the outdoor unit.
- If multiple indoor units show the same code, focus on the outdoor unit’s board or main communication lines.
- E3 – Indoor Fan Speed Out of Range
- What It Means: The indoor fan motor is operating outside the expected RPM, or the system detects a fan motor fault.
- Possible Causes: Obstructed or dirty fan, failing motor bearings, control circuit issue.
- Recommended Action:
- Inspect and clean the indoor fan and housing.
- If mechanical components are clear, test or replace the fan motor.
- E4 – Indoor Room Temperature Sensor (T1) Open/Short
- What It Means: The sensor that measures the room’s ambient temperature has either lost connection or is shorted.
- Recommended Action:
- Check the sensor leads for damage.
- Replace sensor if it fails continuity tests.
- E5 – Evaporator Coil Temperature Sensor (T2) Open/Short
- What It Means: The sensor on the indoor evaporator coil is malfunctioning.
- Recommended Action:
- Inspect T2 sensor location and wiring.
- Replace if physically damaged or if resistance is out of spec.
- EC – Refrigerant Leak Detected
- What It Means: The system suspects a refrigerant leak, usually triggered by abnormal pressure readings.
- Recommended Action:
- Look for oil stains or obvious leaks around fittings.
- Consult a technician to perform a proper leak test and recharge if needed.
- F0 – Overload Current Protection
- What It Means: The system is drawing excessive current, triggering overload protection.
- Possible Causes: Compressor or fan motor jam, short-circuited electrical components, or severely high operating temperatures.
- Recommended Action:
- Turn off the unit to prevent further damage.
- Check for mechanical obstructions in the outdoor unit.
- Contact a professional for a more in-depth electrical and mechanical inspection.
- F1 – Outdoor Ambient Temperature Sensor (T4) Open/Short
- What It Means: Malfunction in the sensor measuring the outdoor ambient temperature.
- Recommended Action:
- Inspect the sensor wire for breaks or corrosion.
- Replace sensor if necessary.
- F2 – Condenser Coil Temperature Sensor (T3) Open/Short
- What It Means: Malfunction in the sensor monitoring the outdoor condenser coil temperature.
- Recommended Action:
- Ensure the sensor is firmly attached to the condenser coil.
- Replace if open or shorted.
- F3 – Compressor Discharge Temperature Sensor (TP) Open/Short
- What It Means: The system can’t properly read the compressor’s discharge temperature.
- Recommended Action:
- Check the sensor location near the compressor discharge line.
- Replace if damaged or if it tests out of specification.
- F4 – Outdoor Unit EEPROM Parameter Error
- What It Means: The outdoor unit’s EEPROM has invalid or corrupted parameters.
- Recommended Action:
- Power cycle the unit.
- If unresolved, the outdoor control board or memory chip may need repair/replacement.
- F5 – Outdoor Fan Speed Out of Range
- What It Means: The outdoor fan motor is not operating within the expected RPM range.
- Possible Causes: Debris interfering with fan blades, motor failure, or control board issues.
- Recommended Action:
- Clear debris and ensure the fan spins freely.
- Test or replace the fan motor if no obstruction is found.
- P0 – IPM Malfunction or IGBT Over-Current
- What It Means: The Intelligent Power Module (IPM) or Insulated Gate Bipolar Transistor (IGBT) is overloaded.
- Possible Causes: Power surges, compressor lock, or shorted motor windings.
- Recommended Action:
- Power down the system immediately to avoid further damage.
- Consult a technician for an in-depth diagnostic on the inverter drive and compressor.
- P1 – Over Voltage or Under Voltage Protection
- What It Means: The inverter drive has detected a voltage supply outside the allowable range.
- Possible Causes: Electrical supply fluctuations, improper wiring, undersized circuit.
- Recommended Action:
- Measure the supply voltage.
- Address any known voltage irregularities (e.g., upgrade wiring, fix loose connections).
- P2 – High Temperature Protection of IPM Module
- What It Means: The IPM (Inverter Power Module) is overheating.
- Possible Causes: Poor air circulation around the outdoor unit, extremely high ambient temperatures, or partial inverter failure.
- Recommended Action:
- Ensure the outdoor unit is not obstructed.
- If the environment is extremely hot, consider shading the unit.
- Consult a technician if the error persists.
- P3A – Outdoor Ambient Temperature Too Low
- What It Means: The system cannot function correctly because the outside temperature is below the operational limit.
- Recommended Action:
- Wait for ambient temperatures to rise into the operating range.
- In very cold climates, consider auxiliary heating or a mini split model designed for low ambient heating.
- P4 – Inverter Compressor Drive Error
- What It Means: A malfunction in the drive system that controls the compressor’s speed.
- Possible Causes: Control board fault, drive circuitry error, or damaged compressor motor.
- Recommended Action:
- Power off the unit to prevent further damage.
- Have a qualified technician evaluate the inverter drive and compressor.
- P5 – Indoor Units Mode Conflict (Multi-Zone Only)
- What It Means: Different indoor units connected to the same outdoor unit have been set to conflicting modes (like one set to cooling, another to heating).
- Recommended Action:
- Verify all indoor units are in the same operating mode.
- Reset modes if necessary to ensure uniform cooling or heating.
- P6 – Low/High Pressure Protection or High Temp IPM Protection
- What It Means: For 36k BTU models, it could indicate either a low-pressure or high-pressure protection issue. For models under 36k, it may point to an IPM temperature issue.
- Recommended Action:
- Check for refrigerant leaks or overcharge.
- Inspect the outdoor coil for blockages if high pressure is suspected.
- If the IPM temperature is high, improve airflow around the outdoor unit.
Final Thoughts and Best Practices
- Regular Maintenance: Many error codes stem from simple issues like dirty coils, clogged filters, or obstructed airflow. Regularly maintaining your mini split—cleaning filters and coils, ensuring adequate clearance around outdoor units—can help prevent many common errors.
- Professional Assistance: Complex issues involving electrical wiring, refrigerant handling, or inverter components generally require a trained HVAC technician to diagnose and fix safely. Attempting DIY repairs on these components can be dangerous and may void your warranty.
- Record Keeping: When an error code appears, note the code and any relevant conditions (e.g., extremely hot day, power surge, or unusual noises). This information can be invaluable to a technician if further investigation is required.
- Stay Within Warranty Terms: If your system is under warranty, follow the manufacturer’s guidelines for service and repairs to maintain coverage. Using unauthorized parts or unlicensed technicians can jeopardize your warranty.
By referencing the tables and explanations above, most homeowners can quickly identify the root cause of a Blueridge mini split error code. While some simple fixes—like cleaning coils or tightening a loose wire—can be done at home, remember that safety and warranty protection are paramount. When in doubt, reach out to a qualified HVAC service professional. This balanced approach between informed DIY checks and professional expertise will help ensure your Blueridge mini split continues to provide efficient, reliable comfort year-round.
