Inverter AC outdoor unit card communication Problem solved | communication error in AC solved

In this video, I repair an inverter AC outdoor unit card with a communication fault between the indoor and outdoor units. During my troubleshooting process, I discovered that one of the optocouplers in the communication line was faulty. By replacing both optocouplers, I resolved the issue and got the AC working again.
This step-by-step guide shows you how to check optocouplers with a multimeter, as well as using an oscilloscope and signal generator on a breadboard. Whether you're a professional technician or a DIY enthusiast, this video provides valuable insights into diagnosing and fixing common inverter AC issues.
Included Processes
- Introduction
- Diagnosing the Communication Fault
- Testing Optocouplers with a Multimeter
- Using an Oscilloscope and Signal Generator
- Replacing the Optocouplers
- Conclusion and Tips
- Inverter AC Repair
- AC Communication Fault
- Optocoupler Testing
- use of Multimeter
- use of Oscilloscope
- use of Signal Generator
- DIY AC Repair
- HVAC Technician Tips
- Inverter Air Conditioner
- Troubleshooting AC Units
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