Ke hele nei ka kaʻa i kahi kūlana hana maʻamau (me nā hiʻohiʻona uila, mechanical a me ke kaiapuni), e hoʻopōkole loa ʻia ke ola o ka pahu kaʻa.ʻO nā kumu o ka hāʻule ʻole ʻana o ka puʻupuʻu fan: ʻo ka nalowale o ka manawa, ka pōkole pōkole, ka coil grounding, overload, rotor lock, voltage imbalance, ...
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