Error code
Mitsubishi Electric klima code 6604
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Meaning
M-NET communication error - No ACK return Error detected by AHC ADAPTER when the other party fails to return the ACK signal after a command transmission on M-NET.
Member details
Signed-in members see the LED pattern and how to read the code with the remote control on eligible records.
View details as a memberPossible causes
(1) Incorrect initial settings (2) The address of the other party on the M-NET transmission line changed during transmission. (3) Defective M-NET transmission line (4) Transmission line or connector disconnected at the address of the other party in M-NET communications. (5) Other party in M-NET communications is effective (6) For communications about multiple refrigerants, the transmission line or connector is disconnected from the terminal block for centralized control (TB7). (7) For communications about multiple refrigerants, power is cut to an outdoor unit. (8) For communications about multiple refrigerants, the power connector (CN40) was not inserted in an outdoor unit. (9) For communications about multiple refrigerants, two or more power connectors (CN40) were inserted for centralized control. (10) For communications about multiple refrigerants, an outdoor unit power supply system is defective. (11) Transmitted data changed due to noise on the M-NET transmission line.
Solution
Solution steps are not shared for faults that may be dangerous.
No do-it-yourself solution is given for this fault. For your safety, call an authorised service.
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