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EA-00

EA-00 — OU: Cool/heat switchover problem

Daikin · ASHP Error Codes

What does EA-00 mean?

The outdoor unit (OU) is having trouble switching between cooling and heating modes.

Common Causes

  • Reversing valve malfunction
  • Refrigerant flow issue
  • Control board error

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the unit's operation mode setting.

  2. 2

    Listen for sounds of the reversing valve engaging.

  3. 3

    Power cycle the unit.

  4. 4

    A qualified technician needs to inspect the reversing valve and refrigerant circuit.

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

7H-017H-01 — Water flow problem7H-047H-04 — Water flow problem during domestic hot water production7H-057H-05 — Water flow problem during heating/sampling
Source: Daikin ASHP Error Codes
Open Manual (Page 3)Search more codes in this manual