Hino 500 EGR valve problem

hino500fe1426

New Recruit
Mechanic
Hi
I have a problem with my EGR valve on my hino 500 fe 1426, when turning egnition on valve won't open but when turning off valve opens and shut. the EGR vavle was disassembled to repair the electrical circuit board and Im thinking that the positioning of the rotars might be the wrong way.
Can someone please give me any suggestions if this might be the problem or something else??
Many Thanks
 
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