Inverter/UPS Not Switching to Battery Backup Repair in Yeshwanthpur

Calls about a Inverter/UPS not Switching to Battery Backup from Yeshwanthpur usually describe connected appliances shut off completely during a power cut instead of running on backup, a delay of several seconds before backup kicks in, if at all, and the display shows mains status even though there is no mains power. In most cases the cause is a failed changeover relay, a faulty battery unable to sustain load, and a sensing fault on the control board. A technician covering Yeshwanthpur (near Yeshwanthpur Railway Station and Metro Station) can visit the same day, confirm the exact cause, and fix it by testing the changeover relay and battery under simulated power-cut conditions and repairing the sensing circuit.