Error code
Mitsubishi Electric SUZ code 6840
No approved translation for this record yet; showing the original text.
Meaning
Indoor/outdoor unit communication error (Signal receiving error) Abnormal if indoor controller board could (1) not receive any signal normally for 6 minutes after turning the power on. Abnormal if indoor controller board could (2) not receive any signal normally for 3 minutes. Consider the unit as abnormal under the (3) following conditions: When 2 or more indoor units are connected to an outdoor unit; when the indoor controller board could not receive a signal for 3 minutes from the outdoor con | times continuously though indoor controller board has transmitted “0”. Indoor/outdoor unit communication error (Signal receiving error) (Outdoor unit) Abnormal if outdoor controller circuit (1) board could not receive anything normally for 3 minutes.
Member details
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View details as a memberPossible causes
Contact failure, short circuit or miswiring (reversed wiring) of indoor/outdoor unit connecting wire Defective transmitting receiving circuit of outdoor controller circuit board Defective transmitting receiving circuit of indoor controller board Noise has entered into indoor/ outdoor unit connecting wire. High pressure (High pressure switch 63H operated) or High compressor temperature (Thermal protector TRS operated) Defective fan motor Defective rush current resistor of outdoor power circuit board supply. Noise has entered into outdoor control wire. Contact failure of indoor/outdoor unit connecting wire Defective communication circuit of outdoor controller circuit board Defective communication circuit of indoor controller board Noise has entered into indoor/ outdoor unit connecting wire.
Solution
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Address of this page: https://www.remfixit.com/tr/mitsubishi-electric/suz/6840