TroubleshootingSamsung Electronics 85ఐ͑ Essential Requirements before PBA Changes in Case of Communication Error Occurrence1. Find the communication IC near the communication terminal.Ɣ Indoor Unit- Coil side or PTC (SMD) side : Communication IC between indoor and outdoor units.Ɣ Outdoor Unit- When there is module communication as in PLUS II and PLUS –Above Red Connector of Main Unit : Communication IC between indoor and outdoor units.- When there is no module communication as in PLUS II and PLUS –Above Yellow Connector of Each Unit : Communication IC between outdoor units.- Other Outdoor Unit- Above Communication Connector : Communication IC between indoor and outdoor unit.Indoor Unit Outdoor UnitOutdoor unitcommunication betweenIndoor Unit communicationTransmitter communication2. Measure the resistance of the communication IC.Ɣ Measurement Method : Measure the No.5- No.6 Pin resistanceMeasure the No.5- No.7 Pin resistanceNo.5No.6No.73. Defectiveness decision of the communication IC which uses a measurement resistance value.Ɣ Judging as Normal- Each resistance value should be measured in tens of kΩ~to hundreds of kΩ.- Difference between the two resistance values should be of some number of kΩ.Ɣ Judging as defective- One or both are low with tens of Ω- One or both of them is open4-3 Appropriate Measures for Different Symptom (cont.)4-3-3 Communication Error between Indoor and Outdoor Units during Tracking (cont.)
