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Error code

Mitsubishi Electric PUHY code 4260

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Meaning

Heatsink overheat protection at startup: When heatsink temperature (THHS) remains at or above TOH for 10 minutes or longer after inverter startup models TOH INV35Y, 36Y 100˚C INV37YC 94˚C

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Possible causes

(1) Thermistor failure (2) Connector contact failure (3) Disconnected wire or partial disconnected thermistor wire (4) Unattached thermistor or contact failure (5) Indoor board (detection circuit) failure (1) Error code definition 5102 HIC bypass circuit outlet temperature sensor (TH2) fault (2) Error definition and error detection method When a short (high temperature intake) or an open (low temperature the outdoor unit stops, turns to anti-restart mode for 3 minutes, When a short or an open is detected again (the second detection) stops, turns to anti-restart mode for 3 minutes, and restarts in range. When a short or an open is detected again (the third detection) makes an error stop. When a short or an open of the thermistor is detected just before error stop, and the error code "5102", "5103", 5104", "5105", During 3-minute antirestart mode, preliminary errors will be displayed A short or an open described above is not detected for 10 minutes Codes minutes after defrost mode.

Solution

Solution steps are not shared for faults that may be dangerous.

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