Error code
DAIKIN 5 Troubleshooting Outdoor unit RXYTQ-T Diagnosis Counter- measures 2 Method for Detecting Malfunction Detect according t code H9
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Meaning
Faulty Outdoor Air Thermistor
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View details as a memberPossible causes
Faulty connection of outdoor air thermistor Faulty outdoor air thermistor Faulty outdoor unit PC board (A1P) NO YES Normal? NO YES Normal? (See 1) 1: For thermistor temperature and resistance characteristics, refer to information on ‘6 - 44. Thermistor Resistance / Temperature Characteristics’. Check for the connection of connector (X18A) of the outdoor air thermistor. Properly connect the connector. Disconnect the connector of the thermistor from the outdoor unit PC board, and then make measurement of resistance using a multiple meter. Replace the outdoor air thermistor (R1T). Replace the outdoor unit PC board (A1P).
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