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Ashley SantiagoAug 6, 2025
Why does the ALARM [DC SOURCE FAIL] appear on my Ulvac Power Supply when I turn it on?
- DDr. Tammy Miranda PhDAug 6, 2025
If the alarm [DC SOURCE FAIL] appears when you turn on the breaker of your Ulvac Power Supply, it might be due to an incorrect three-phase 200 V phase order (R, S, T). Verify the phase order and correct it if necessary. If the problem persists, it may indicate internal component damage, and you should contact Ulvac for assistance.
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