Error code

Mitsubishi Electric PU code E6

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Meaning

(e6): Indoor/outdoor unit communication error (Signal receiving error) Abnormal if indoor controller board can 1 not receive any signal normally for six minutes after putting the power on. Abnormal if indoor controller board can 2 not receive any signal normally for three minutes. Consider the unit abnormal under the 3 following condition: When two or more indoor units are connected to one outdoor unit, outdoor unit cannot receive a signal for three minutes from indoor controller board, a signal which

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Possible causes

(1) Contact failure, short circuit or, mis-wiring (converse wiring) of indoor/outdoor unit connecting wire. (2) Mis-wiring of outdoor power supply wire and indoor/outdoor unit connecting wire (3) Defective transmitting receiving circuit of indoor controller board (4) Defective transmitting receiving circuit of indoor controller board (5) Noise has entered into indoor/outdoor unit connecting

Solution

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