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Error code

Mitsubishi Electric PFD/PUHY code 1302

No approved translation for this record yet; showing the original text.

Meaning

High pressure fault 1 (Outdoor unit): 1) If the pressure sensor detects a pressure of 3.78 MPa [548 psi] or higher during operation, the outdoor unit stops, goes into the 20-second restart delay mode, and automatically restarts after 20 seconds. 2) If the pressure sensor detects a pressure of 3.78 MPa [548 psi] or higher again (second detection) within 30 minutes of the first stoppage of the outdoor unit, the outdoor unit stops, goes into the 20-second restart delay mode, and automatically restarts after 20 seconds.

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Possible causes

(1) Indoor unit LEV2a, b actuation failure -> Cooling Indoor unit LEV actuation failure -> Heating (2) Closed refrigerant service valve (3) Short cycle on the indoor unit side (4) Clogged filter on the indoor unit (5) Reduced air flow due to dirty fan on the indoor unit fan (6) Dirty heat exchanger of the indoor unit (7) Indoor fan (including fan parts) failure or motor failure Rise in high pressure caused by lowered condensing capacity in heating operation for (2) - (7). by low pressure drawing for (8) - (10). (11) Solenoid valve (SV1a) malfunction (The by-pass valve (SV1a) can not control rise in high pressure). (12) Thermistor failure (TH3, TH7) (13) Pressure sensor failure (14) Failure of the thermistor input circuit and pressure sensor input circuit on the controller board (15) Thermistor mounting problem (TH3, TH7) (16) Disconnected male connector on the pressure switch (63H1) or disconnected wire (1) Inner pressure drop due to a leakage. (2) Pressure sensor failure (3) Shorted-circuited pressure sensor outer rubber (4) A pin on the male connector on is missing or contact failure (5) Disconnected pressure sensor (6) Failure of the pressure sensor controller board

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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