Mitsubishi Electric Error Codes

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Mitsubish Electric Error Codes

​Mitsubishi Electric air conditioning systems are renowned for their ultra-quiet operation and cost-effective performance, offering significant savings on both installation and running costs.​

If you’re encountering error codes with your Mitsubishi Electric air conditioner and need prompt assistance, our team is here to help. Don’t hesitate to call us at 0203 488 1889 or email us at info@becoolrefrigeration.co.uk. For more information about our Air Conditioning Repair Services, click here.

Mitsubishi Electric Error Codes List:

City Multi Systems:

  • 403: Communications fault between boards. Check the inverter error details to identify the specific boards involved, and inspect the transformer, bus voltage, and interconnecting cables. 

  • 900: The Lossnay unit is in a test run. ​

  • 1102: Compressor discharge temperature is too high (exceeded 110°C). This may indicate a refrigerant shortage or a discharge thermistor issue. ​

  • 1301: Low pressure fault detected before starting. Inspect thermistors (TH2, TH3, TH4), refrigerant charge, indoor fan, heat exchanger, and filters. ​

Mr. Slim P Series (A-Control):

  • A0: Green LED – 2 flashes, Red LED – 5 flashes, Controller 6600: Lossnay units have the same address. Change the addresses and reset the unit. ​

  • A2: Green LED – 2 flashes, Red LED – 5 flashes, Controller 6602: Transmission processor hardware error. Check communications wiring and the Lossnay board for faults. ​

  • A6: Green LED – 2 flashes, Red LED – 5 flashes, Controller 6606: Communication error with the communication processor. Check the M-Net voltage. ​

  • E0: Green LED – 2 flashes, Red LED – 3 flashes: Communication error with the remote controller. Verify wiring, voltage, and connections. If multiple systems are connected, check the master/slave settings. ​

Mr. Slim P Series (K-Control):

  • E0: System transmission error. There could be a communication fault between the indoor and remote controllers. ​

  • P4: Drain sensor fault. Check the drain sensor resistance and connections. ​

  • P5: Drain fault. High levels of condensate detected; inspect for blockages in the drain, tray, or possible pump failure. ​

  • P7: System error due to an address setting fault. ​

Additional Common Error Codes:

  • P1: Intake sensor error. ​

  • P2 – P9: Pipe (liquid or 2-phase) sensor error. ​

  • E6 – E7: Indoor/outdoor unit communication error. ​

  • PA: Forced compressor error. ​

  • P6: Freezing/overheating safeguard operation. ​

  • EE: Communication error between indoor and outdoor units. ​

  • P8: Pipe temperature error. ​

  • E4: Remote controller signal receiving error. ​

  • Fb: Indoor unit control system error (memory error, etc.). ​

  • E1 – E3: Remote controller transmission error. ​

  • E9: Indoor/outdoor unit communication error (transmitting error) in the outdoor unit. ​

  • UP: Compressor overcurrent interruption. ​

  • U3 – U4: Open/short circuit of outdoor unit thermistors. ​

  • UF: Compressor overcurrent interruption (when compressor is locked). ​

  • U2: Abnormal high discharging temperature or insufficient refrigerant. ​

  • U1 – Ud: Abnormal high pressure or overheating safeguard operation. ​

  • U5: Abnormal temperature of heat sink. ​

  • U8: Outdoor unit fan safeguard stop. ​

  • U6: Compressor overcurrent interruption

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Daikin Error Codes Explained: Troubleshoot Like a Pro

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Daikin Error Codes: What They Mean and How to Fix Them

Daikin air conditioners are designed with advanced technology to ensure optimal performance. However, like any system, they can encounter issues. When this happens, your unit will display an error code. These codes are your air conditioner’s way of identifying problems, making it easier for you to diagnose and resolve them.

What Are Daikin Error Codes?

Daikin error codes are alphanumeric signals displayed on your air conditioner’s control panel or remote. Each code corresponds to a specific issue within the system, such as:

  • ➜ Sensor malfunctions.
  • ➜ Power supply problems.
  • ➜ Refrigerant issues.
  • ➜ Component failures.

By interpreting these codes, you can quickly pinpoint the root cause of the malfunction.

Using the Daikin Error Code Search Tool

The Daikin Error Code Search Tool is a helpful resource that allows you to input the displayed code and access detailed information about the issue. With this tool, you can:

  • ➜ Understand the exact cause of the problem.
  • ➜ Learn how the error affects your system.
  • ➜ Find recommended troubleshooting steps.

Daikin Error Code Lookup

Common Daikin Air Conditioning Error Codes

  • A1 – Indoor PCB defect
  • A3 – Drain level control system error
  • A5 – Antifreeze/cooling mode heating error
  • A6 – Fan motor error
  • C4 – Heat exchanger temperature sensor error
  • C5 – Outdoor unit fan motor error
  • C7 – Suction air temperature sensor error
  • C9 – Outdoor unit air temperature sensor error
  • CA – Malfunction of discharge air temperature sensor
  • E0 – Outdoor activation of outdoor safety device
  • E1 – Outdoor PCB defect
  • E3 – High pressure control or system high pressure error
  • E4 – Low pressure error
  • E5 – Activation of compressor over heat protection
  • E6 – Compressor error
  • E7 – Front panel communication error
  • E8 – Overcurrent error
  • F3 – Discharge pipe temperature error
  • F6 – High floor temperature sensor error
  • H6 – Operation halt due to freeze protection
  • H8 – High pressure sensor error
  • H9 – Outdoor unit air sensor error
  • J3 – Gas leak detection
  • J6 – Heat exchanger overheat protection
  • J9 – Malfunction of thermistor (ice detection)
  • L1 – Inverter PCB defect
  • L3 – Electrical parts box temperature rise
  • L4 – High heat sink temperature error
  • L5 – Activation of compressor overcurrent protection
  • P0 – High pressure protection of compressor
  • P1 – High voltage of capacitor in main inverter circuit
  • P4 – Inverter radiator high temperature
  • U0 – Low pressure drop due to refrigerant shortage or electronic expansion valve failure
  • U2 – Power supply insufficient or instantaneous failure
  • U4 – Communication error between indoor and outdoor units
  • U5 – Communication error between outdoor unit and remote controller
  • UA – Compressor drive error
These codes can indicate various issues ranging from minor sensor faults to more serious problems requiring professional repair. If you encounter any of these error codes, it’s advisable to refer to your user manual or contact us since we are certified Daikin service providers for further assistance.
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How to Check Daikin Error Codes

To identify and resolve issues, follow these steps:

  1. Locate the Error Code
    Look for the error code on your air conditioner’s control panel or remote display. If you’re unsure where to find it, check your Daikin user manual.

Download the Daikin Error Code locator User Manual

  1. Refer to the Error Code List
    Each Daikin system has a comprehensive list of error codes specific to its model. This list can be found in your manual or downloaded here

 Daikin Error Code List

  1. Use the Search Tool
    Enter the error code into the Daikin Error Code Search Tool to get detailed insights about the issue and its resolution.

  2. Follow Recommended Fixes
    Use the information provided to address the issue. For minor problems, you may be able to resolve the error yourself. For more complex issues, professional service may be required.

All the data has been Collected from the Official Daikin website here

Contact us for Air Conditioning Repair

If troubleshooting doesn’t resolve the problem, or if the error code indicates a critical issue (e.g., compressor failure or refrigerant leak), it’s best to seek professional assistance. Daikin-certified technicians have the expertise and tools needed to handle complex repairs.

All of our technicians are certified to Repair Daikin Air Conditioning Unit’s , to find out more click here.

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Call: 0203 488 1889

Address:
Office 7, 35/37 Ludgate Hill
London, EC4M 7JN

Email:
info@becoolrefrigeration.co.uk

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Be Cool Air Conditioning & Refrigeration London

Call: 0203 488 1889

Address:
Office 7, 35/37 Ludgate Hill
London, EC4M 7JN

Email:
info@becoolrefrigeration.co.uk

f-gas, safe contractor, & city guilds certification