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Error code

Mitsubishi Electric PFD/PQHY code 1302

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

Meaning

Abnormal high pressure 1 (outdoor unit) Abnormal high pressure 2 (outdoor unit): 1. If the pressure of 3.87MPa or higher is detected by the pressure sensor during operation (the first detection), the outdoor stops once, turns to anti-restart mode for 20 seconds, and restarts after 20 seconds automatically. 2. If the pressure of 3.87MPa or higher is detected by the pressure sensor again (the second detection) within 30 minutes after the first stop of the outdoor unit, the outdoor unit stops once, turns to anti-restart mode for 20 seconds, and restarts after 20 seconds automat

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Possible causes

(1) LEV failure on the indoor unit -> Heating (2) Closed ball 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). (11) Solenoid valve (SV1) malfunction (The by-pass valve (SV1) can not control rise in high pressure). (12) Thermistor failure (TH2, TH5, TH6). (13) Pressure sensor failure (14) Failure of the thermistor input circuit and pressure sensor input circuit on the main board (15) Faulty mounting of thermistor (TH5, TH6) (16) Disconnected male connector on the pressure switch (63H) or disconnected wire (17) Melted fuse (F1 or F2) on the controller board (1) Inner pressure drop due to a leakage. (2) Pressure sensor failure (3) Shorted-circuited pressure sensor cable due to torn outer rubber (4) A pin on the male connector on the pressure sensor is missing or contact failure (5) Disconnected pressure sensor cable (6) Failure of the pressure sensor input circuit on the 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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