There are 2 known reasons: 1)The synco is probably mis-wired. 2) You will need to have a peanut converter installed to boast the 26Vac 400hz. Mid Continent sells a unit to handle this issue.
There are 2 known reasons: 1)The synco is probably mis-wired. 2) You will need to have a peanut converter installed to boast the 26Vac 400hz. Mid Continent sells a unit to handle this issue.