How I Made 3 Phase Power Using Just a Capacitor to Fix a 4 Ton AC!

In this video, learn how to fix the F1 error on a Koolman 4-ton non-inverter air conditioner by creating a fake three-phase supply using simple capacitors. If you don't have access to a real three-phase connection, this method allows you to test and troubleshoot the Koolman AC outdoor PCB safely. We cover step-by-step how to simulate three-phase from a single-phase supply, diagnose signal relay and optocoupler issues, test the high-pressure switch, and explain the real reasons behind the F1 error fault. This guide is perfect for HVAC technicians, electronics repair enthusiasts, and DIYers who want to master AC PCB troubleshooting and outdoor board repair. Watch as we repair a Koolman outdoor circuit board, test key components like relays and optocouplers, and successfully resolve the F1 error without a full three-phase setup. Subscribe for more detailed AC repair, PCB testing, and DIY electronics repair tutorials.

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