This system keeps going out on high head pressure for both circuits (400psig). Both condenser fans are running, and both coils are clean. When I spray a hose with water on the condenser coil and have it run it runs just fine, but as soon as I shut the water off it go's out on high head?

It just started today, but could it be low on charge? It's not even 100 out like it was last week, and didn't have a problem.

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