Fault Codes / Mitsubishi Heavy / E61
KX / FD — Communication error between the master unit and slave units.
Mitsubishi Heavy E61: Communication error between the master unit and slave units. This fault noticeably affects operation.
Source: Mitsubishi Heavy Industries FDC-KXZE2 VRF Troubleshooting Manual (KX-T-378), "8. System Troubleshooting Procedure" error code table
Reviewed by Anıl Güzeldemir — in the refrigeration machine room since 2006, developer of Enthalio.
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