CodeRegistry
Brands
  1. Home
  2. Samsung
  3. Air Conditioning
  4. E556
About·Privacy·Terms

CodeRegistry — Your global library for technical solutions.

For your safety: always follow the equipment manufacturer’s official manuals. CodeRegistry is an independent help site and is not affiliated with the brands listed here.

E556

E556 - Mismatching indoor and outdoor unit capacity error

Samsung · Air Conditioning

What does E556 mean?

This error occurs when the installed indoor and outdoor units have incompatible or mismatching capacities, preventing proper system operation.

Common Causes

  • Mismatching indoor and outdoor unit capacity.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off the unit's power.

  2. 2

    Check the model names and capacities of both the indoor and outdoor units.

  3. 3

    Re-enter the correct option code for the indoor unit to match the outdoor unit.

Browse all codes in this manual (137)
Verified technical data. Last updated: April 2026

Related Faults

Abnormal displayAbnormal outdoor LED display - Error modeAll LEDs offAll outdoor unit LEDs off - No powerC101/C102C101 or C102 - Indoor to outdoor communication error
Source: Samsung Air Conditioning
Open Manual (Page 63)Search more codes in this manual