自分なりに少し訳してみました

Repeatedly　only remort-controller had have contact-failure caused by rust.
(SSL reported　thus)

Remort controller is installed just beside main machine.
Why did only remort controller affected from rust of humidity?
I guess both machine supposed to be OK in the room of normal humidity
for us?
If it ain't so in the near future the same trouble caused with humidity could
occur again ?
I dare to send the machine to you in order to dispel such anxiety.
No other machine haven't suffered from such failure by humidity.
Could you kindly advise me about that pending problem.
In the US how about your room's humidity ?

I honestly want to know why is my Avocet only
such sensitive to room humidity.
For future reference please give me a good advice to avoid frequent breakdown.
Thank you for your help with this matter.