Daikin VAM 150FAVE Service Manual

Contents

Daikin VAM 150FAVE Service Manual Manual pdf 51 page image

Troubleshooting SiE71-20242 Troubleshooting1.9 Data Transmission Error (Between LCD Remote Controller and Main Unit)Remote ControllerLCD DisplayError Code U5 Inspection 5 Unit No. 5LED Indication Remote Controller 5 Main Unit 5Error DetectionMethodMicrocomputer checks if data is transmitted properly between main unit and remote controller.Error GeneratingConditionsWhen data transmission is not performed correctly for a certain time period.Possible Causes Faulty connection of remote controller cable Faulty remote controller cable External factor (noise, etc.)TroubleshootingNote: Note 1:1. Use tester to check continuity of remote controller cable. Disconnect cable from main unit terminal board and remote controller terminal board. Measureresistance between wires in cable. Resistance should be ∞ MΩ (infinity).2. Use tester to check voltage at terminal board.Check with power turned on. With remote controller cable disconnected, voltage between P1 and P2 on terminal board should beapprox. 16 VDC. If measured value is not approx. 16 VDC, PCB assembly is faulty. Connect remote controller cable and disconnect remote controller. Voltage at the end of remotecontroller cable should be approx. 16 VDC. If measured value is not 16 VDC, remote controller cable isfaulty. Connect remote controller cable and remote controller. Voltage between P1 and P2 on remotecontroller terminal should be approx. 16 VDC. If measured valued is not 16 VDC, remote controller isfaulty.Check connection ofremote controller cable tocontrol PCB assembly onterminal board.Isremotecontroller cablenormal?Note 1YESYESCorrect wiring.Replace remote controllercable.Possibility of external factor(instead of equipment error).Isconnectioncable betweenmain unit and remotecontrollerproperlywired?NO(HF008)NOP2P1(HL032)LCD remotecontrollerRemotecontrollerfor heatrecoveryventilation unitJC J2 J1 F2 F1 P2 P1Main unit PCB