Error code

Mitsubishi Electric PQHY code 6606

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Meaning

Communication error with the transmission processor Communication error between the main microcomputer on the indoor unit board and the microcomputer for transmission Note: The address/attribute appeared on the display on the remote controller indicates the controller where an error occurred. Error | Communication error with the transmission processor Communication error between the main microcomputer on the indoor unit board and the microcomputer for transmission Note: The address/attribute appeared on the display on the remote controller indicates the controller where an error occurred. Code 6607 No ACK abnormality Error Error disDetection adplay method dress M-NET reNo acmote conknowltroller (RC) edgement MA remote (ACK) at controller BC trans- (MA) mission OC controlM-NET reNo ac- (BC) m

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Possible causes

(1) Data is not properly transmitted due to accidental erroneous operation of the controller of the error source. (2) Error source controller failure definition and error detection method Error definition and error detection The error is detected when no acknowledgement transmission. (eg. When the data interval, the error is detected on Note: The address/attribute appeared indicates the controller Cause (1) Contact failure of transmission of OC or BC (2) Decrease of transmission line age/signal by exceeding acceptable range of transmission wiring Farthest : to 200 m [656ft] or less Remote controller wiring: 10m [32ft] or less (3) Erroneous sizing of transmission line (Not within the range below). 1.25mm2 Wire diameter: [AWG16] or more (4) Heat source unit main board ure (5) Power circuit failure of heat source unit (1) When BC controller address is changed or modified during operation. (2) Faulty or disconnected transmisIC sion wiring of BC controller (3) Disconnected connector of BC controller (CN02) (4) Faulty control board of BC controller (1) When IC unit address is changed or modified during operation. (2) Faulty or disconnected IC transmission wiring (3) Disconnected IC connector (CN2M) to (4) Indoor unit board failure (5) M-NET remote controller failure (1) The power source of LOSSNAY has been shut off. (2) When the address of LOSSNAY changed in the middle of the operIC ation (3) Faulty or disconnected transmission wiring of LOSSNAY (4) Disconnected connector (CN1) LOS

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