25 Koppel aircon error codes + troubleshooting

Koppel aircon is one of the top-selling brands in the world. It is popular for its high quality, durability, and performance. The one even better thing that comes with the air conditioner is its ability to detect the issues in the unit and indicate it using a specific error code. This feature prevents the system from facing any major damage.

For your convenience, we have gathered all the error codes along with their causes and solutions. It is always recommended to seek the assistance of a professional HVAC engineer or a technician if you are unable to understand the scenario or the components.

Koppel air conditioner error code E0

Causes:

This error is displayed on the Koppel aircon when/if:

1. The indoor unit EEPROM parameter is not functioning properly.
2. The data on indoor unit EEPROM has been removed.
3. The indoor unit EEPROM chip is broken, burned, or damaged.

Solutions:

Contact the company’s HVAC professional to:

1. Check the EEPROM and if it is not working, change the control board with a new one.
2. Re-enter the data or program on the EEPROM chip.
3. Check the PCB (Printed Circuit Board) for any issues. Replace it if it is not functioning properly.

Always contact the company’s customer support to seek assistance from an HVAC engineer to reprogram the EEPROM. Only they have all the control and approach to the programming of EEPROM. The data from the company would be 100% accurate according to your AC model and version.

Koppel air conditioner error code E1

Causes:

This error is triggered on the Koppel aircon when/if:

1. The indoor and outdoor units have poor communication or no communication at all.
2. There are some problems or issues with the communication wires.
3. Main PCB is not operating well.

Solutions:

1. Restart the system after turning it OFF for about 15-30 seconds.
2. Use the controller or remote to reset the communication settings.
3. Inspect the communication wire and fix or change it according to the damage.
4. Check the indoor and outdoor units’ signal receivers of communication. Repair it if it is faulty.
5. If the error remains, change the main PCB as it is malfunctioning.

Koppel air conditioner error code E2

Causes:

This error is reported by the Koppel aircon when/if:

1. The zero crossing signal is not received by the main PCB for more than 4 minutes.
2. The time interval for the zero crossing signal is abnormal.

Solutions:

1. Check the supply voltages and ensure they are consistent and in the normal range.
2. Check all the connections and wiring. Repair any pinched wire or damaged connector.
3. Check the power supply and if it is not stable or normal, Turn OFF the air conditioner until the power supply gets stable. Replace the power supply if needed.
4. If the error is still here, replace the main PCB as it is itself faulty.

Koppel air conditioner error code E3

Causes:

This error is displayed on the Koppel aircon when/if:

1. The indoor unit fan speed is out of range.
2. The fan speed of the indoor unit is inconsistent.

Solutions:

1. Get rid of any foreign object stuck in the fan blades, limiting its operation.
2. Repair damages relating to the wires and connections between the fan motor, main PCB, and power supply.
3. Make sure that all the elements of the fan are correctly installed.
4. Check the fan motor for any malfunction. Repair or replace it if needed.
5. If the error remains. Replace the main PCB or repair it if it is not functioning.

Koppel air conditioner error code E4

Causes:

This error is triggered on the Koppel aircon when/if:

1. The indoor unit’s room temperature sensor T1 is faulty.
2. The room temperature sensor T1 of the indoor unit has an open or short circuit.

Solutions:

1. Check the resistance coefficient and if the sensor is weak, replace it with a new and compatible one.
2. Inspect the position of the sensor and if it is bent or displaced, place it correctly.
3. Look for any faults in the connections between the sensor and the main PCB. Repair wiring and connectors where needed.
4. Replace the sensor if it is at fault.
5. If you are still getting the error, inspect the main PCB and replace it if it’s faulty.

Koppel air conditioner error code E5

Causes:

This error is reported by the Koppel aircon when/if:

1. The evaporator coil temperature sensor T2 of the AC unit is not working.
2. There was an open or short circuit in the evaporator coil temperature sensor T2.

Solutions:

1. Try the exact solutions as suggested for the Koppel air conditioner “Error Code E4”.

Koppel air conditioner error code EC

Causes:

This error is displayed on the Koppel aircon when/if:

1. The system has discovered any outflow or refrigerant leaks.
2. The system has activated the protection mode to prevent any harm to the compressor.

Solutions:

1. Remove the dust materials deposited in the air filter.
2. Get rid of all dirt or dust from the condenser, evaporator, and coils.
3. Inspect condenser coils, evaporator, condenser, and other refrigerant-containing components for any leakage. Repair the defective area.
4. Fill the refrigerant if it is low.

Koppel air conditioner error code F1

Causes:

This error is triggered on the Koppel aircon when/if:

1. The ambient temperature sensor T4 of the outdoor unit is defective.
2. There was an open or short circuit with the ambient temperature sensor T4.

Solutions:

1. Try the exact solutions as suggested for the Koppel air conditioner “Error Code E4”.

Koppel air conditioner error code F2

Causes:

This error is reported by the Koppel aircon when/if:

1. The condenser coil temperature sensor T3 is not working.
2. The sensor T3 has an open or short circuit.

Solutions:

1. Try the exact solutions as suggested for the Koppel air conditioner “Error Code E4”.

Koppel air conditioner error code F3

Causes:

This error is displayed on the Koppel aircon when/if:

1. The compressor discharge temperature sensor T5 is malfunctioning.
2. The discharge temperature sensor T5 has experienced an open or short circuit.

Solutions:

1. Try the exact solutions as suggested for the Koppel air conditioner “Error Code E4”.

Koppel air conditioner error code F4

Causes:

This error is triggered on the Koppel aircon when/if:

1. The outdoor unit EEPROM parameter is not operating well.
2. The instructions or data on the outdoor unit EEPROM have been deleted.
3. The EEPROM chip of the outdoor unit is defective or damaged.

Solutions:

1. Try the exact solutions as the Koppel air conditioner “Error code E0”.

Koppel air conditioner error code F5

Causes:

This error is reported by the Koppel aircon when/if:

1. The speed of the fan is uncontrollable or changing.

Solutions:

1. Try the exact solutions as the Koppel air conditioner “Error code E3”.

Koppel air conditioner error code P0

Causes:

This error is displayed on the Koppel aircon when/if:

1. The IPM (Intelligent Power Module) is defective.
2. The system has initiated the IGBT (Insulated-Gate Bipolar Transistor) over-strong current protection mode.

Solutions:

1. Turn the AC unit OFF and restart it after keeping it OFF for a few minutes.
2. Check the power supply and main power wire for any damages. Repair damages and ensure a stable supply of power voltages.
3. Inspect the wires and connectors between and of the IPM and the sensor. Fix the damages where needed.
4. Inspect the IGBT and repair it if it’s defective. Take professional help if needed.
5. If the error does not go away, check the main PCB and replace it if needed.

Koppel air conditioner error code P1

Causes:

This error is triggered on the Koppel aircon when/if:

1. The over or over-low voltages are given to the system.
2. The system is in over-high or over-low voltage protection mode.

Solutions:

1. Inspect the voltage level with the help of a voltmeter and bring it to the normal level.
2. Examine the main power cord and make sure it is plugged well into the switch.
3. Check all the power supplies and electrical parts of the system. Repair or replace the spare parts as needed.
4. Repair any issues related to loose or broken connections.
5. Check the power supply of the system and if it is at fault, replace or repair it as preferable.
6. If the error is still there, check the compressor and its corresponding parts. Repair or replace the defective part as needed.

Koppel air conditioner error code P2

Causes:

This error is reported by the Koppel aircon when/if:

1. This error occurs when there is an extreme increase in the temperature of the heat exchanger.
2. The system is detecting overheating in the units.

Solutions:

1. Check that all the parts related to the heat exchanger are working properly and placed correctly. Seek the help of an installation engineer if needed.
2. Examine the outdoor fan. If it is not working properly, try removing the restrictions or moving the fan by hand until it starts working smoothly.
3. Check the EXV. Remove all the debris or dust particles clogged up there. If necessary, replace it.
4. Clean up any dirt or dust particles in the coils. Clean it thoroughly and get rid of all the dust that has been deposited.
5. Inspect the coil sensor for any defects. Change it if it is malfunctioning.

Koppel air conditioner error code P4

Causes:

This error is displayed on the Koppel aircon when/if:

1. The inverter compressor drive is not working properly.

Solutions:

1. Turn OFF the AC system. Restart it after keeping it OFF for a few minutes.
2. Check for any poor connections or damaged wires between the inverter compressor and the main PCB. Fix the damaged wiring and connections if they are loose.
3. Ensure that all the connections are in place and connected tightly.
4. Check the main PCB for any problems. Change or repair it if it is defective.
5. If the error persists, examine the compressor. If the compressor is defective. replace it.

Koppel air conditioner error code P7

Causes:

This error is triggered on the Koppel aircon when/if:

1. The outdoor unit IGBT sensor is not operating well.
2. The IGBT sensor of the outdoor unit has experienced an open or short circuit.

Solutions:

1. Try the exact solutions as suggested for the Koppel air conditioner “Error Code E4”.

Koppel air conditioner error code J0

Causes:

This error is reported by the Koppel aircon when/if:

1. This error occurs when the air conditioner detects that there is an increase in the temperature of the condenser during the HEATING mode.
2. The condenser temperature sensor is not working.
3. The refrigerant line has some problems or the refrigerant is at a low level.

Solutions:

1. Shut down the air conditioner for about 15-30 minutes. After it cools down, restart it again.
2. Use the voltmeter to inspect the voltages of the condenser. Check if the voltages are at a constant level. If not, try bringing it to the required level.
3. Check the wires and connections between the condenser, power supply, condenser temperature sensor, and the main PCB. Fix all the issues in the defective wires and repair the loose connections.
4. Examine the sensor for any faults. Repair or replace the sensor if needed.
5. Remove all the debris or dust particles that have built up in the EXV valve. Replace the valve if it has been broken or damaged.
6. Check the refrigerant line for any restrictions. Remove all the blockages that cause the limitations. Ask the technician for help where needed.
7. Check the refrigerant level and if it is low, refill the freon gas. Seek the help of an HVAC engineer for a refill.
8. If the error is still here, the condenser is the one at fault. Replace it with the new one.

Koppel air conditioner error code J1

Causes:

This error is displayed on the Koppel aircon when/if:

1. This error happens when the air conditioner has an increase in the temperature of the condenser during the COOLING Mode.
2. The condenser temperature sensor is defective.
3. The refrigerant line or refrigerant level has some issues.

Solutions:

1. Try the exact solutions as suggested for the Koppel air conditioner “Error code J0”.

Koppel air conditioner error code J2

Causes:

This error is triggered on the Koppel aircon when/if:

1. This error happens when the system initiates the protection mode during the compressor discharge at a higher temperature. It is detected by the PCB.

Solutions:

1. Turn OFF the air conditioner for a few minutes and let it cool down. Restart it to see if the problem resolves.
2. Check the voltages using the meter and ensure that the supply to the air conditioner is at the required level.
3. Clean up dust particles or debris from all parts of the air conditioner such as the condenser, evaporator, air filters, blowing, etc.

Koppel air conditioner error code J3

Causes:

This error is reported by the Koppel aircon when/if:

1. This error occurs when the PFC (Power Factor Correction) does not operate well.
2. It occurs during issues in PFC protection of only 42K, 48K, or 60K sensors.

Solutions:

1. Make sure that the PFC is fitted properly and well placed at its location.
2. Check for any issues with the PFC sensor. Repair or replace it if it is faulty.
3. Change the main board of the unit after getting the help and suggestion of an HVAC engineer.

Koppel air conditioner error code J4

Causes:

This error is displayed on the Koppel aircon when/if:

1. The outdoor main chip and compressor-driven chip IR341 have some issues in communication.
2. There are some problems within the wires for the communication between the outdoor main chip and compressor-driven chip IR341.
3. The main PCB board is not working.

Solutions:

1. Turn OFF the system and let it rest for 20-30 seconds. Then turn it On again.
2. Reset the communication settings of the outdoor main chip and compressor-driven chip IR341 by using the remote.
3. Check for any damage in the wiring and loose connections. Fix the problem as needed.
4. Inspect the signal receiver of communication from both chips and fix it if there are any malfunctions.
5. If the error persists, check the main PCB. Repair or replace it as per needed.

Koppel air conditioner error code J5

Causes:

This error is triggered on the Koppel aircon when/if:

1. This error occurs when high-pressure protection is detected in the air conditioner.

Solutions:

1. Power OFF the air conditioner for a few seconds. Then turn it back ON to see if the problem resolves.

Call a technician to;

1. Inspect the stop valve.
2. Check the pressure level by using a meter.
3. Examine any malfunctions in the HPS connection and fix the problem. Make sure this connection is persistent.

Koppel air conditioner error code J6

Causes:

This error is reported by the Koppel aircon when/if:

1. This error occurs when there is low pressure in the air conditioner.
2. Low-pressure protection is started in the air conditioner.

Solutions:

1. Check the stop valve for any malfunctions. Repair the defective areas and clean the stop valve from any dirt and dust.
2. Inspect the resistance coefficient of the sensor and replace it with a stronger one, if it is weak or damaged.
3. Check the wiring and connections between the low-pressure sensor and coil sensor. Fix or change the sensors of the outdoor unit in case of any malfunction.
4. Check the voltage supply with the meter. Make sure the voltage being supplied is consistent and stable.
5. If the error is still here, check the refrigerant level. If it is low, refill it with freon gas with the help of an engineer.

Koppel air conditioner error code J8

Causes:

This error is displayed on the Koppel aircon when/if:

1. This error is indicated by the initiation of high-voltage pressure protection to prevent any damage to the compressor.

Solutions:

1. Ensure that the main power cord is plugged correctly into the switch.
2. Check for any damage to the wires or connections. Repair all the damaged wires and loose connections.
3. Inspect the power supply and make sure it is stable. Repair it as required.
4. Check the main PCB. If it is not working well, fix or replace it as needed.
5. If the error remains, check the compressor and replace it if it is faulty.