Error code

DAIKIN 5 Troubleshooting Outdoor unit RXYTQ-T Diagnosis Counter- measures 2 Method for Detecting Malfunction Detect by an abnor code H7

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Meaning

Fan Motor Signal Detection Error

Member details

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Possible causes

Abnormal signal from fan motor (Circuit failure) Disconnection/Short circuit in fan motor leads or disconnection of connector Faulty inverter PC board (A3P, A6P) NO YES Replace the fan motor. NO YES Turn OFF the power supply. GND Connector for signal cable (X2A or X4A) Vcc W V U Check for fan motor applicable to the malfunction code “H7” while in monitor mode. (For the checking procedure, refer to information on pages 87 to 94.) Detailed malfunction codes H7-01/05/09: Fan motor 1 (M1F) Master / Slave 1 / Slave 2 H7-02/06/10: Fan motor 2 (M2F) Master / Slave 1 / Slave 2 Is the connector of signal cable of the relevant fan motor normally connected? Is resistance between Vcc and UVW and between GND and UVW of the fan motor lead in balance? 5 Gray 4 Pink 3 Orange 2 Blue 1 Yellow Properly connect the connector. Replace the inverter PC board. ●For Fan motor 1, replace the inverter PC board A4P. ●For Fan motor 2, replace the fan inverter PC board A7P. Check for the connector of the fan motor. (See1) 1: Procedure for checking for the connector of the fan motor. (1) Turn OFF the power supply. (2) Disconnect the connector (X2A or X4A) from the PC board, and then make measurement of the following resistance. Acceptance criteria: Resistance between phases falls within the range of ±20%. Make measurement of resistance between Vcc and UVW and between GND and UVW.

Solution

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