10 Derby air conditioner error codes + troubleshooting

Since the inception of Derby in 1985, it has been growing rapidly. Its products have taken Europe and a big part of the world by storm with its high-quality air conditioners. Derby is widely known as one of the best air conditioner manufacturing companies in the United Kingdom. No matter how good an appliance is or if it was working great for years, issues and problems can occur simply because it involved electrical components.

You get annoyed when the air conditioner is showing signs of some issue but you are unable to detect the actual cause or issue. The good thing is that the Derby air conditioner comes with a Self-Diagnosis feature that displays a specific error code whenever an issue occurs. This saves you from the hassle of troubleshooting the cause. Firstly, implement the below-suggested solutions but always seek the assistance of a local technician if the error is not going anywhere.

Derby air conditioner error code E0

Causes:

  1. This error is reported by the AC unit when the EEPROM is not functioning properly.
  2. Instructions or programming on the EEPROM are erased or the AC unit is not reading the chip.
  3. The EEPROM chip has been burned or damaged mostly because of a short circuit or voltage fluctuation.

Solutions:

  1. Restart the air conditioner after turning it OFF for about 5-15 seconds. Energize the unit many times.
  2. Reset the air conditioner unit to its factory or default settings.
  3. Check the EEPROM chip for any burnout. Replace the whole main PCB (Printed Circuit Board) or Control Board of the AC unit if the chip is faulty.
  4. Contact Derby’s customer support to seek assistance from an official engineer. Let him reprogram the EEPROM if all the instructions were erased.

It is always recommended to only ask an official engineer for reprogramming as only they have the actual program and access to the back end for uploading and integration.

Derby air conditioner error code E1

Causes:

  1. The indoor and outdoor units of the air conditioner are unable to communicate.
  2. The communication wire between the two units is damaged or the connectors are loose.
  3. The main Control Board or PCB is malfunctioning.

Solutions:

  1. Turn OFF the air conditioner and then turn it ON after 5-15 seconds. Energize the unit or reset the settings to default.
  2. Check the communication wire and its connectors for any damages. Repair the wire and connectors as needed.
  3. Check the wiring and connections between the main PCB and communication-related components of the AC unit.
  4. If still getting the error, contact a local technician to inspect the main PCB for any faults. Replace the PCB if defective.

Derby air conditioner error code E2

Causes:

  1. The error is triggered if there is some disturbance when the voltage line is changing its polarity (negative to positive, positive to negative).
  2. The power supply of the AC unit is malfunctioning or has completely gone bad.

Solutions:

  1. Turn OFF the air conditioner and then switch it ON again after a few seconds.
  2. Make Sure that AC is plugged in properly.
  3. Check the connections and connectors while making sure they are fine and in place.
  4. Call a technician to inspect the power supply for any faults. Replace the power supply if needed.

Derby air conditioner error code E3

Causes:

This error is triggered on the Derby air conditioner when/if:

  1. The speed of indoor or outdoor fans is getting out of control or fluctuating.
  2. Inconsistent voltages are being supplied to the fan motor.
  3. Fan belts have cracked, stretches, or gone bad.
  4. The fan capacitor has been worn out or defective.

Solutions:

  1. Using a meter, check the voltages and make sure they are consistent and in the proper amount.
  2. Look through the fan motor belt and tighten them properly. Replace the belts with new ones if they are stretched or worn out.
  3. Check the capacity level and if it is low or weak, replace the fan capacitor.
  4. Clean the fan blades to remove dust, debris, or something stuck in them.
  5. Check the fan motor for any malfunction. Repair or replace the motor as suggested.

Derby air conditioner error code E5

Causes:

  1. This error is reported by the air conditioner when the temperature sensor of the outdoor unit is malfunctioning.
  2. The outdoor temperature sensor has an open or short circuit.

Solutions:

  1. Turn OFF the air conditioner and turn it ON again after a few seconds.
  2. Inspect the wiring, connections, and connectors between the temperature sensor and the main PCB. Repair the wiring and connectors where needed.
  3. Check the sensor for any burnout or damage. Replace the sensor if broken.
  4. Contact a local technician to inspect the main PCB for any malfunctioning. Replace the PCB if faulty.

Derby air conditioner error code E6

Causes:

This error is triggered when the air conditioner detects some issues with two main sensors of the unit.

  1. The room temperature sensor (T1) is malfunctioning.
  2. The evaporator temperature sensor (T2) is not functioning properly.
  3. Either of the T1 or T2 temperature sensors has an open or short circuit.

Solutions:

  1. Try the exact solutions as suggested for the Derby air conditioner “Error Code E5”.

Derby air conditioner error code P0

Causes:

  1. This error is triggered when the air conditioner goes under the main PCB protection mode for the outdoor unit.
  2. Outdoor PCBs have some issues or malfunctions.

Solutions:

  1. Restart the air conditioner after turning it OFF for about 5-15 seconds.

Call a local technician or an electrician to:

  • Inspect the wiring and connections of the outdoor unit PCB. Repair pinched wires and loose connectors if there are any.
  • Check the outdoor PCB for any faults, breakages, or burnout. Replace The PCB if defective.

Derby air conditioner error code P1

Causes:

This error is reported by the AC unit because of two main reasons:

  1. The AC unit has initiated the overvoltage or overcurrent protection.
  2. The AC unit has entered the low voltage or undercurrent protection.

Solutions:

  1. Switch OFF the AC unit for about 30-60 seconds and then turn it ON again. Energize the unit multiple times.
  2. Using a meter, check the voltages being supplied to the AC unit. Make sure they are consistent and in the required amount.
  3. Check the power supply line for any breakages or damages. Repair the line, switch, cord, or any other issue as needed.
  4. Contact a local electrician or AC engineer to inspect the power supply and other electrical components of the unit for any faults. Repair or replace components as suggested by the technician.

Derby air conditioner error code P2

Causes:

  1. This error indicates the main control board of the AC unit is getting information about an increase in compressor temperature.
  2. Low refrigerant level.
  3. The compressor temperature sensor is malfunctioning.
  4. Defective PCB or Control Board.

Solutions:

  1. Turn OFF the air conditioner for about 15-30 minutes if it was operating continuously for days.
  2. Look around the outdoor unit and ensure nothing is stopping the airflow toward the compressor. Ensure good ventilation of the component.
  3. Check the refrigerant level in the AC unit. Fill freon if it is less than required.
  4. Check the compressor temperature sensor for any malfunction. Replace the sensor if needed. 
  5. If still getting the error, the main PCB or outdoor unit PCB is at fault. Replace it if it is defective.

Derby air conditioner error code P4

Causes:

This is an inverter compressor drive error that is triggered when/if:

  1. Voltages to the compressor are not consistent.
  2. The outdoor fan motor is not working efficiently.
  3. The PCB of the outdoor unit is faulty or malfunctioning.
  4. The compressor itself is faulty.

Solutions:

  1. Restart the air condition after keeping it shut down for about 1-3 minutes.
  2. Using a meter, check the voltages and make sure that they are in the required amount and not fluctuating.
  3. Check the refrigerant valves and ensure that they are all open and in good shape.
  4. Ensure that the outdoor fan is working efficiently. Repair or replace the fan motor if faulty.
  5. Replace the outdoor PCB if it is faulty.
  6. Call a technician to check the compressor for any faults. Replace the component if needed.

Miscellaneous Errors/Problems in Derby Air Conditioner

The Derby air conditioner unit is not starting.

Causes & Solutions:

  1. Power has been cut from the source. Check the switch, cord, and power supply and wait for the power to be restored.
  2. Check and ensure that the AC unit is properly plugged into the wall receptacle.
  3. Check the fuse as it may have tripped or blown away completely. Replace the fuse if broken.
  4. Check the battery in the remote controller as it may have gone dead and need replacement.
  5. Go through the air conditioner settings and ensure that no timer is set on your AC unit. Cancel or deactivate the timer settings.

The Derby air conditioner is not cooling or heating efficiently even though the air is coming out effectively.

Causes & Solutions:

  1. Incorrectly set temperature can be a big cause. Make sure that the temperature is properly set according to the overall room or external atmosphere temperature.
  2. Check the cooling coils and air filters for any dust, debris, or clogging. Clean the coils and filters.
  3. The door and windows of your room are partially or completely opened. Check through these things and close them properly.
  4. The air inlet or the air outlet of either of the AC unit parts is clogged or the path is blocked. Remove all the barriers or blockages and restart the air conditioner.
  5. The Derby air conditioner is in compressor protection mode. Wait for 3 minutes and the AC will start its normal functioning.
  6. If the problem is still there in the AC unit even after applying all these suggestions mentioned above, contact the company and give them details about the issue occurring. Call a local technician if the unit needs to be inspected.
Can ac cause cold in babies
Can ac cause cold in babies

You may also like