Ok guys this will be hard to put into words but here goes.
Working on a pury-p300ygma. Unit is cutting out on 1102 high discharge. Have had 2 mitsi engineers down to look at it and have about 40hours of m-net tool readings. We have changed the oil bypass valve(sv1) as its dumping discharge into suction. So we tought anyway.... Then today changed the 4way valve and checked the check valve. Unit runs ok on cooling but cuts out after 6mins on heating. Any ideas????