Error code

Mitsubishi Electric PQHY/PQRY code 6841

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Meaning

A control communication synchronism not recover: Indoor/heat source unit communication error (Transmitting error) (Heat source unit) Abnormal if "0" receiving is detected 30 times continuously though heat source controller circuit board has transmitted "1". Abnormal if heat source controller circuit board could not find blank of transmission path for 3 minutes.

Member details

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Possible causes

(1) Indoor/heat source unit connecting wire has contact failure. (2) Defective communication circuit of heat source controller circuit board. (3) Noise has entered power supply. (4) Noise has entered indoor/heat source unit connecting wire.

Solution

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