Daikin RZQG71L9V1 Service Manual

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Daikin RZQG71L9V1 Service Manual Manual pdf 182 page image

Troubleshooting by Remote Controller ESIE15-13C168 Service Diagnosis4.31 Refrigerant Shortage (Alert)RemoteControllerDisplayU0ApplicableModelsRZQGMethod of ErrorDetectionRefrigerant shortage is detected according to the electronic expansion valve opening degreeand measured temperatures and pressures.Error DecisionConditions(In cooling operation)When the electronic expansion valve opens fully and low pressure is below 0.25 MPacontinuously for 30 seconds.(In heating operation)When the electronic expansion valve opens fully and the suction superheat is large (more than20°C) continuously for 60 seconds.* Even if error occurs, operation will continue.SupposedCauses Stop valve is not opened Insufficient refrigerant amount Clogged refrigerant piping systemTroubleshootingNote:* Refrigerant shortage alarm is indicated but operation continues.Refer to P.194.NO Collect refrigerant. After vacuumdrying is complete, charge anappropriate amount ofrefrigerant.YESIs the refrigerantamount appropriate?Check the refrigerant pipingsystem for clogging.Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.CHECK 9CHECK 9