overheating transformer on a GFI circuit
My GFI keeps popping with a Hunter Pro-C (15 zones) plugged into it--and nothing else on the circuit drawing power. Electrician claimed there was a ground wire not connected (faulted). Found one on the circut and the GFI worked for a while. Now the problem is back, so I've tried another GFI circuit in the garage to eliminate the original circuit as the problem altogether.
Now the electrician says the controller should not be on a GFI (hum??), rather it should be on a non-GFI'd circuit. Throughout this process, when I have check the transformer, it has been very hot to the touch; almost too hot to handle (130F or thereabouts). My electrical engineering background tells me something on solenoid side of this system is pulling too much power from the transformer. Moreover, the transformer is hot even when no zone is active (off) put the controller has power. Hum... I think something may be shorting somewhere sprinkler-side. Solenoids? Should I have the sprinkler installer come and check them? I paid him to get it working right, so I don't think I should fix it for him.
Any help would be greatly appreciated.
Bryan
Bryan