Adding a Condensing unit to an Intertherm electric...

Question

well my problem is that an wiring issue that deals with the blower motor. It will work fine when in cooling but when switched to heating mode the motor will smoke. Its definetly a mis wire but schematic is set up for heating only and has had three other people rigging it up and now schematic isnt right and central air has been added also can anyone throw me some tips on what the problem could be