EEPROM Error or Capacity Inconsistency — Internal memory or unit mismatch

What does EEPROM Error / E556 mean?

This error indicates a problem with the unit's internal memory (EEPROM) or an inconsistency between the indoor and outdoor unit model settings. E556 specifically refers to a capacity inconsistency between units.

• Damaged EEPROM component.
• Incorrect option code set for the indoor unit.
• Mismatch between indoor and outdoor unit model names.

Click steps to track your progress.

1. 1

   Turn off the air conditioner at the main power switch or circuit breaker and wait 30 seconds.

2. 2

   Turn the power back on. This may reset temporary memory glitches.

3. 3

   Verify that the correct model names for both indoor and outdoor units match the installation specifications, if accessible (e.g., from the product manual).

4. 4

   If the error persists or if model options need to be re-entered, contact customer support for assistance.