1) Fault phenomenon: The device cannot be started. Only the DC current meter has an indication when starting, and there is no indication of DC voltage and intermediate frequency voltage. Analysis: a. The inverter trigger pulse has a pulse phenomenon; b. Inverter thyristor breakdown; c. Capacitor breakdown; d. The load has a short circuit and grounding phenomenon; e. The intermediate frequency signal sampling loop has an open circuit or a short circuit.
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