Error code

Mitsubishi Electric PUHY code 6843

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Meaning

A control communication start bit detection error: Indoor/outdoor unit communication error (Signal receiving error) Abnormal if indoor controller board could not receive any signal normally for 6 minutes after turning the power on. Abnormal if indoor controller board could not receive any signal normally for 3 minutes. Consider the unit as abnormal under the following condition. When 2 or more indoor units are connected to an outdoor unit, indoor controller board could not receive a signal for 3 minutes from outdoor controller circuit board

Member details

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Possible causes

(1) Contact failure, short circuit or miswiring (converse wiring) of indoor/outdoor unit connecting wire (2) Defective transmitting receiving circuit of outdoor controller circuit board. (3) Defective transmitting receiving circuit of indoor controller board.

Solution

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