i cannot find a schematic for my DUCANE HP10B36PA heat pump i want to repair the unit myself and need a blueprint. The coil on my outdoor heat pump is freezing over. The coil is clean and my fan stops and starts periodically as it does when going into defrost mode i need to trouble shoot and could use a drawing to give me an idea of the control sequence in defrost mode. the Ducane web site offers no type of support for any repairs of this unit.