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Error code

Mitsubishi Electric PUHY/PURY code 1302

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Meaning

High pressure fault 1 (Outdoor unit): 1) If the pressure of 3.78MPa [548psi] or higher is detected by the pressure sensor during operation (the first detection), the outdoor stops once, turns to antirestart mode for 3 minutes, and restarts after 3 minutes automatically.

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Possible causes

(1) Indoor unit LEV actuation failure (2) BC controller LEV malfunction Heating only or heating main : Indoor LEV 3 Defrost : LEV3 (3) BC controller SVM1 and 2 malfunction ->Cooling only or defrost (4) BC controller SVA and SVC malfunction ->Cooling only or cooling main (5) BC controller SVB malfunction ->Heating only or heating main Solenoid valve SV malfunction(4a-4d) ->Cooling only or cooling main (6) Port address setting error. (7) Refrigerant service valve actuation failure (8) Short cycle on the indoor unit side (9) Clogged filter on the indoor unit (10) Reduced air flow due to dirty fan on the indoor unit fan (11) Dirty heat exchanger of the indoor unit (12) Indoor fan (including fan parts) failure or motor failure Items (7) through (12) above reduce the condensing capability of the unit, resulting in high-pressure rise during heating operation. (16) Solenoid valve (SV1a) malfunction The by-pass valve (SV1a) can not control rise in high pressure. (17) Thermistor failure (TH3, TH7) (18) Pressure sensor failure (19) Failure of the thermistor input circuit and pressure sensor input circuit on the controller board (20) Thermistor mounting problem (TH3, TH7) (1) Inner p

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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