We have heard and seen a loud burst and spark in our 40kVA UPS , which caused sudden shut down of the UPS and all our computers shut down suddenly without warning. What could have caused the loud spark ? What is the remedy for this ? The Fault Message states that " Mains not available, Frequency/volt out of range"
We recently replaced the two power modules in the UPS and later installed a 45 kA TVSS and Phase failure to protect the UPS from power surges and fluctuations. Could this have had any effect on the UPS ?
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