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Michele GreeneJul 25, 2025
How to fix no power light on SEP LEM022SJ Measuring Instruments?
- KKelly MooreJul 25, 2025
If the power supply indicator (L1, L2 & L3 LED) on your SEP Measuring Instruments isn't lighting up, begin by checking the switch, circuit-breaker, fuse, and thermal cut-off. Ensure the terminal screws on L1, L2, L3, and N are correctly installed and tightened. Verify a 230V 50Hz AC voltage between the terminal screws on N and L1, L2, or L3 when the power supply is input. Also, check the terminal screws on 25, 24, 23, 22, 21, and 20, ensuring they are fixed. Confirm a 230V 50Hz AC voltage between terminal screws N and 24, 22, or 20 when the power supply is input. If issues persist, it may be necessary to replace the meter.
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