E0
Daikin Outdoor Unit Protection / General Error

Daikin system shows E0; unit may not start or may shut down quickly

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Outdoor PCB internal fault, Incorrect power supply, Severe communication error, Misconfigured system settings

How to Fix / Troubleshooting

Safety first: Turn off power to the outdoor unit before opening any panels.

User checks:

  • Confirm that the outdoor unit has adequate ventilation and is not blocked by debris.
  • Cycle power off for 5 minutes and then back on to see if the error clears.

Technician actions:

  • Use Daikin service tool or service mode to read detailed sub-codes.
  • Check outdoor PCB for visible damage and verify all supply voltages.
  • Replace the outdoor PCB if diagnosed as faulty.
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Repair Difficulty

Professional Required 5/5

Required Part

Outdoor Unit Main PCB
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