32 Aerotek aircon error codes + troubleshooting

Aerotek has come up with some of the best air conditioners in the market. Their safety features are some of the best in the world and one such feature is their self-diagnosis system. This feature detects any issues occurring in the system and displays a specific error code indicating that specific problem.

Below are all the error codes with possible causes. We have also suggested solutions so that you can take the error down. For the safety of your system and the people around it, always contact an HVAC engineer when required.

Aerotek aircon error code E0

Causes:

1. The system is unable to determine the flow rate of water.
2. The process of determining the flow rate of water is interrupted in between.
3. The system flow meter is malfunctioning.

Solutions:

1. Check and clean the water flow piping as they can be clogged because of calcium, magnesium, sodium, and other minerals build up.
2. Check and ensure that the piping is free of sludge, slurry, rust, and air bubbles. Seek professional help for the inspection of the pipings.
3. Inspect the water flow meter and ensure it is working fine. Repair or replace the meter if it is defective.
4. Check and ensure that the piping is installed in its intended position and there isn’t any vibration or movement. Contact an installation engineer for fixation.

Aerotek aircon error code E1

Causes:

1. An issue has occurred while connecting different phases of the system.

Solutions:

1. Check and ensure phases are not damaged. Do repairs if defective.
2. Ensure the correct sequence of phases while connecting them.
3. Repair any broken wires or phase connectors.
4. Contact a licensed technician to check the phases and correctly connect them.

Aerotek aircon error code E2

Causes:

1. The indoor and outdoor units of the air conditioner are unable to communicate with each other.
2. The communication between two components within a unit is interrupted.
3. There are some issues with the indoor and outdoor unit’s linking wires.
4. The main PCB of either unit is malfunctioning.

Solutions:

1. Restart the system as this could be a glitch and can be resolved after rebooting the air conditioner.
2. Check for any issues in the linking wire between two components or the units. Repair or replace the broken, damaged, or burned wires as required.
3. Ensure all connectors are properly plugged into their intended ports.
4. Check for any issues in the main PCB as it can be defective and needs replacement.

Aerotek aircon error code E3

Causes:

1. The temperature sensor of the cooling liquid in the outdoor unit is malfunctioning.
2. The wiring and connections are damaged.
3. An open or short circuit in the temperature sensor of the outdoor unit cooling liquid.
4. Malfunctions in the main PCB.

Solutions:

1. Check the resistance coefficient of the sensor with the help of a meter. Replace it with a stronger and more compatible one.
2. Check the sensor for any issues. Make sure that it is perfectly positioned at its intended place and connected tightly to the main PCB.
3. Check for any damage, loose or broken wires, and connections. Repair or replace damages if it is needed.
4. If the sensor itself is defective, replace it with a new one.
5. If the error persists, check if the main PCB is defective. Replace it if it is malfunctioning.

Aerotek aircon error code E4

Causes:

1. The water temperature sensor of the air conditioner is not working properly.
2. Some interruption has occurred when exiting from the water temperature sensor.
3. The wire harness is damaged or the sensor has an open or short circuit.
4. The main PCB is faulty.

Solutions:

1. Try the exact solutions suggested for the Aerotek aircon “Error Code E3”.

Aerotek aircon error code E5

Causes:

1. The temperature sensor of the tubes of capacitor A has some issues in functioning.
2. Shell and tube heat exchanger has issues.
3. There is an open or short circuit in the temperature sensor of the tubes of capacitor A.
4. There are loose or broken wires and connections.
5. There are some malfunctioning in the main PCB.

Solutions:

1. Try the exact solutions suggested for the Aerotek aircon “Error Code E3”.

If the shell-and-tube heat exchanger is malfunctioning:

• Check and ensure the correct level of pressure in the system.
• Clean the tube sheets to remove any obstructions.
• Look through the piping and lines for leakages. Do immediate repairs if there are any. Verify the refrigerant level after repairing leaks.
• Inspect the gaskets and do maintenance if they are faulty.

Aerotek aircon error code E6

Causes:

1. There are some issues in the temperature sensor of the tubes of capacitor B.
2. The connections and wiring in the sensor have some issues.
3. The temperature sensor of the tubes of capacitor B has an open or short circuit.
4. The main PCB is not working well.

Solutions:

1. Try the exact solutions suggested for the Aerotek aircon “Error Code E3”.

Aerotek aircon error code E7

Causes:

1. The outdoor unit temperature sensor is malfunctioning.
2. There is an open or short circuit in the outdoor unit temperature sensor.
3. The outdoor temperature sensor has loose, broken, or damaged wires and connections.
4. The main PCB is facing some problems in its functioning.

Solutions:

1. Try the exact solutions suggested for the Aerotek aircon “Error Code E3”.

Aerotek aircon error code E8

Causes:

1. The discharge line temperature sensor is defective.
2. The wiring and connections in the sensor have some issues.
3. The open or short circuit occurs in the temperature sensor of the discharge line.
4. The main PCB is faulty.

Solutions:

1. Try the exact solutions suggested for the Aerotek aircon “Error Code E3”.

Aerotek aircon error code E9

Causes:

1. The system has detected some issues while determining the water flow at the compressor of system A.

Solutions:

1. Try the exact solutions suggested for the Aerotek aircon “Error Code E0”.
2. If the error remains, contact a licensed technician to inspect compressor system A. Do repairs or replacements as suggested by the technician.

Aerotek aircon error code EA

Causes:

1. The system or main unit has recorded a decrease in the number of additional blocks.

Solutions:

1. Contact the company customer support center for guidance.
2. Seek the assistance of a licensed technician or authorized HVAC engineer to fix this problem after proper troubleshooting.

Aerotek aircon error code EB

Causes:

1. The temperature sensor is malfunctioning.
2. The wire harness of the sensor is damaged.
3. The sensor has an open or short circuit.
4. The heat exchanger is frozen or the system is under defrost mode.

Solutions:

If the temperature sensor is the cause of the error:

1. Try the exact solutions suggested for the Aerotek aircon “Error Code E3”.

If the heat exchanger is frozen:

• Let the system complete the defrost process if it’s running on the system.
• If not, turn the air fan ON and set the speed level at maximum for some time.
• Turn OFF the AC unit and ensure proper airflow to the system.
• Remove the icing on the heat exchanger using a brush while being gentle. (only do this if the ice is not melting even after implementing all the solutions)

Aerotek aircon error code EU

Causes:

1. The system is unable to receive any output from one of the modular units.

Solutions:

1. Check and ensure that the right mode is running on the system. Change the system switch to heating mode to see if the error resolves.
2. Switch the fan setting from “AUTO” to the “ON” position. Run the fan at maximum speed as it can cause the units to perform.
3. Check and ensure that the set thermostat is not below room temperature.
4. Check and ensure that the refrigerant pipes and humidifier are clean. Remove any obstructions stuck in there.
5. If the error remains, contact an HVAC engineer to inspect modular units and make necessary repairs.

Aerotek aircon error code ED

Causes:

1. The communication between the modular unit and the drive controller is interrupted.

Solutions:

1. Try the exact solutions suggested for the Aerotek aircon “Error Code E2”.
2. If the error remains, contact an HVAC engineer or a licensed technician to inspect the drive controller and modular unit. Do repairs or replacement of components as needed.

Aerotek aircon error code Ed

Causes:

1. The system has entered the protection mode for the electrical supply to prevent any major damage.

Solutions:

1. Check the CAN bus and grounding in all of the CAN circuits. Do repairs if there is an open or short circuit in any of these parts.
2. Inspect the main power cord and wire harness of the electrical power supply. Repair any damaged wires or disconnected connectors.
3. If the error remains, inspect the power supply and the control module as they can be faulty. Go for a repair or replacement as suggested by the technician.

Aerotek aircon error code EE

Causes:

1. The communication system between the computer and the drive controller is not working.
2. The computer or drive controller is malfunctioning.
3. The EEPROM is erased.
4. The permanent memory chip is damaged.

Solutions:

1. Try the exact solutions suggested for the Aerotek aircon “Error Code E2”.
2. Inept the drive controller and repair it if it is defective.
3. Contact an authorized HVAC engineer to reprogram the EEPROM or permanent memory chip with compatible instructions.
4. Inception the EEPROM and replace the PCB or control board if it is malfunctioning.

Aerotek aircon error code EF

Causes:

1. The water inlet temperature sensor has some malfunctions.
2. The wiring and connections are damaged or burned in the sensor.
3. There is an open or short circuit in the temperature sensor at the water inlet.
4. The main PCB is not functioning properly.

Solutions:

1. Try the exact solutions suggested for the Aerotek aircon “Error Code E3”.

Aerotek aircon error code F1

Causes:

1. The permanent memory of the system is corrupt.
2. The instructions on the permanent memory have been erased.
3. The permanent memory or EEPROM chip of the stem is damaged.
4. The main PCB of the system is malfunctioning.

Solutions:

1. Check for any issues in the permanent memory chip. If it is defective, replace the whole control board to remove the error.
2. Contact a professional engineer to check the programs and instructions on the permanent memory chip. Reupload or rewrite the instructions if it has been erased or removed.
3. Check the main PCB for any issues. Repair or replace it if it is defective.

Aerotek aircon error code F2

Causes:

1. The system is facing issues when connecting the wires controllers.

Solutions:

1. Check and ensure that you are using the correct wiring and connectors for making connections.
2. Ensure correct power supply to the wired controllers.
3. Ensure that all wiring and connections between multiple wired controllers are fine. Repair any damaged wires or loose connectors. 
4. Inspect the wired controllers’ PCB and replace the board if it is malfunctioning.

Aerotek aircon error code P0

Causes:

1. The injection line of AC system A is overheating.
2. The temperature exceeds the normal range.

Solutions:

1. Change the thermostat to a bit higher such as if it is at 24°C, level up to 26°C.
2. Open the system cover and clean the air filters. Ensure no dirt, dust, or foreign particles are causing blockages or restrictions for the air to flow properly.
3. Ensure nothing is inside the room emitting heat such as a heater, stove, or even a cigarette in some cases.
4. Ensure the injection line is in good shape without any blockages or breakages.
5. If the error remains, contact an expert for overall maintenance and ensure periodic maintenance of the system.

Aerotek aircon error code P1

Causes:

1. The system has detected a decrease in the pressure of system A.

Solutions:

1. Do a thorough cleaning of the system especially the outdoor unit to ensure nothing is clogged or has items stuck in them.
2. Take a look at the air conditioner and its components that involve refrigerant or water. Contact a technician if any damages need repairs.
3. If still getting errors, ask the technicians to check the AC system thoroughly as this could be an internal system issue.

Aerotek aircon error code P2

Causes:

1. The injection line of system B is overheating or the temperature is exceeding the normal limit.

Solutions:

1. Try the exact solutions suggested for the Aerotek aircon “Error Code P0”.

Aerotek aircon error code P3

Causes:

1. The pressure in system B has decreased drastically.

Solutions:

1. Try the exact solutions suggested for the Aerotek aircon “Error Code P1”.

Aerotek aircon error code P4

Causes:

1. There is a high voltage supply in system A.
2. System A has initiated the over-current protection mode to prevent damage.
3. There is a blockage in the refrigerant circuits, piping, heat exchanger, evaporator, or related components due to clogged-up dirt.

Solutions:

1. Check the power cord for any issues. Make sure that the terminals are perfectly connected to their receptors.
2. Check for any blockages in the refrigerant circuits. Clean or repair the parts that are clogged up due to dust or dirt buildup.
3. Clean the condenser coils and other parts thoroughly to remove all the dust or debris.
4. Check for any issues in the power supply. Repair or replace it if it is defective.
5. Inspect the inverter compressor. Repair or replace it if it is malfunctioning or its components are defective.

Aerotek aircon error code P5

Causes:

1. Overcurrent occurred in system B.
2. System B has initiated the over-current protection mode.
3. Blockage in the refrigerant circuits, piping, heat exchanger, or evaporator due to clogged-up dirt.

Solutions:

1. Try the exact solutions suggested for the Aerotek aircon “Error Code P4”.

Aerotek aircon error code P6

Causes:

1. There is an increase in the condenser pressure of system A.

Solutions:

1. Check the condenser coils for any clogging because of dirt or sodium build-up.
2. Ensure that the fan is working fine and nothing is causing a restriction. Remove if some object is causing a disturbance.
3. Contact an HVAC engineer to check the pressure level and ensure all switches are fine.
4. If the error remains, check the condenser or respective component and do repairs as this could be at fault.

Aerotek aircon error code P7

Causes:

1. System B has detected an increase in the pressure of the capacitor.

Solutions:

1.  Try the exact solutions suggested for the Aerotek aircon “Error Code P6”.

Aerotek aircon error code P8

Causes:

1. The temperature sensor in the discharge line is malfunctioning.
2. There is an open or short circuit.
3. The wiring and connections have some issues.
4. The main PCB is faulty.

Solutions:

1. Try the exact solutions suggested for the Aerotek aircon “Error Code E3”.

Aerotek aircon error code P9

Causes:

1. The compressor of system A is malfunctioning.
2. The system has started protection against the temperature difference of the water flowing at the outlet and inlet.

Solutions:

For compressor:

1. Checking wiring and power supply to the compressor. Ensure consistent supply and repair of any damaged wires.
2. Contact a technician to inspect the compressor and do repairs or complete replacement as needed.

For the difference in water inlet and outlet temperature:

• Check and make sure that the temperature difference is within the range of 10-12 degrees. Doing so will resolve the error.
• Check the evaporator and clean it to remove any clogging or restrictions.
• Check water inlet and outlet switches for any damages. Ensure they are working fine.
• If the error remains, inspect the evaporator and water supply for any malfunctioning. Do repairs as needed.

Aerotek aircon error code Pb

Causes:

1. The system has detected frost.
2. The AC unit has initiated the protection mode to wipe out the frost.

Solutions:

1. Run the fan at maximum speed and allow the air to melt down the frost from coils and other components.
2. Allow the AC to complete the defrosting process as this can take the error down.
3. Remove icing from the coils using a soft brush or scraper while being gentle.

Aerotek aircon error code PE

Causes:

1. The shell-and-tube heat exchanger of the AC unit is supercooled.

Solutions:

1. Change the thermostat and see if the error resolves.
2. Ensure proper airflow to the shell-and-tube heat exchanger.
3. Seek professional help if the error remains to inspect the shell-and-tube heat exchanger and repair it as needed.

Aerotek aircon error code RA

Causes:

1. The system has entered the protection phase against supercooling during the start-up.

Solutions:

1. Turn OFF the air conditioner and let it rest for some time.
2. Give AC the time to defrost and come into normal functioning with no icing on coils.
3. Clean the air filters while removing dust, debris, or foreign objects.
4. Clean the supply vents and ensure they aren’t clogged.
5. Remove if something is placed in front of the return vents and block the flow.