Error code

Mitsubishi Electric MXZ code E9

No approved translation for this record yet; showing the original text.

Meaning

Indoor - branch box/branch box - outdoor unit communication error (Transmitting error) (Branch box/outdoor unit) (1) Abnormal if “0” receiving is detected 30 times continuously though branch box/ outdoor controller circuit board has transmitted “1”. (2) Abnormal if branch box/outdoor controller circuit board could not find blank of transmission path for 3 minutes.

Member details

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Possible causes

(1) Indoor–branch box/ branch box–outdoor unit connecting wire has contact failure. (2) Defective communication circuit of outdoor controller circuit board (3) Noise has entered power supply. (4) Noise has entered Indoor– branch box/branch box– outdoor unit connecting wire.

Solution

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