Then it's not installed properly, probably the neutral/ground.
No - its the stupid computer. And I mean its stupid. I have had tons of fun with it. It is really a bad a idea to buy a heat pump that takes all functionality away from you and the stupid computer makes all the decisions for you. And don't get me started on the thermostat control scheme.
And the code it threw was not in any manual I could find.
Did you ground your generator?
My furnace did the same thing till I ran a ground for my generator.
I do this for a living, there is something wrong with your installation or possibly the frequency/voltage control of your generator. It is not the computer on your heat pump.
