in this video in this video DC Inverter AC Outdoor Unit Circuit Board Course Repair / Function / Troubleshooting Part 2. the video language is Urdu /Hindi i discussed the rectifier circuit, dc rail, bulk capacitor, pfc circuit, IGBT in power factor correction circuit, reactor and metal oxide voltage arrester (MOV) and ceramic capacitor for ripple removal.
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in this video DC Inverter AC Outdoor Unit Circuit Board Course Repair / Function / Troubleshooting - Part 1. in this part i discussed the components in EMI Electromagnetic Induction / RFI Radio frequency interference. it contains fuse for current protection, first stage filter for high frequency harmonics, mov metal oxide varistor for high voltage protection, surge arrester for lightening arrester. then we have PTC for positive temperature co-efficient to protect over current surges. then there is a a bypass relay to operate the circuit in normal mode. in any conditions the microcontroller turns off the bypass relay and the circuit load is transferred to PTC for more protection
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