My customer has 3 single phase 230v AC eveporator fans fitted in a freezer room. They are all connected in parallel.
They are ebm model S4E350-AP06-59. The rated current draw is 0.58A @230V 50Hz.They all have a 4uf run capacitor installed. These fans have been working trouble free at an amperage setting of 2.2A of the overload setting. Today the overload has been tripping and has to be reset every 5 minutes.Amperage draw is 0.9A on each of the fans.
Total amp draw is 2.7A voltage is 222V.These fans are 3 months old.There is no ice build up on the eveporator to cause a blockage of the blades.There was an storm last night.Could lightning have caused the capacitors to go faulty? Any thoughts on this anyone.I am on my way to measure them and check for any shorting down to earth. I have increased the overload to 3.2A and the fans have since been running for 2 hours.
Cheers,
Feeze