Control transformer

[Brett1]

Had issues with a 240v to 120v control transformer not supplying power to 2 cooling fans. Both fans were connected to transformer via X1 and X2 wiring. X2 wiring was not bonded to ground initially. After bonding X2 to ground, fans would run. Any explanation would be great.

 

[westward10]

Shouldn't X2 be grounded anyway? One theory you have lost the neutral (X2) at the fans and by grounding the transformer it has somehow resolved it.

 

[Brett1]

Shouldn't X2 be grounded anyway? One theory you have lost the neutral (X2) at the fans and by grounding the transformer it has somehow resolved it.

Yes I believe that x2 should be grounded but wouldn’t you still have 120 volts between x1 and x2 off the transformer and thus power to run the fans?

 

[westward10]

I don't suppose the fans are grounded to one terminal.

 

[westward10]

Yes I believe that x2 should be grounded but wouldn’t you still have 120 volts between x1 and x2 off the transformer and thus power to run the fans?

It sounds like the transformer is good. You need to check continuity of X2 from the transformer to the fan motors.

 

[Brett1]

It sounds like the transformer is good. You need to check continuity of X2 from the transformer to the fan motors.

Alright, definitely something to check. If the continuity were to be good. Should these fans be able to run even if x2 wasn’t grounded then?

 

[westward10]

Alright, definitely something to check. If the continuity were to be good. Should these fans be able to run even if x2 wasn’t grounded then?

Hard to say without being there. Have the fans ever run or is this a new installation.