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Mr. James MejiaJul 30, 2025
What to do if the yellow LED flashes and the buzzer sounds continuously on my MGE UPS Systems 1500C?
- JjeremywelchJul 30, 2025
This indicates that the phase and neutral position monitoring function has detected a reversal. If you have directly earthed neutral type networks, correct the cabling by unplugging and turning the network socket (DIN-SCHUKO type) by 180 degrees, or have an electrician modify your electrical network. For other network types, deactivate the detection function by pressing the pushbutton 9 behind the UPS for at least 5 seconds (UPS stopped and connected to the network for less than 30 minutes).