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Mini Split A5 Error

richardi's picture

 Hello - 

I’ve been using my Fujitsu Mini Split system on Dry Mode without any problems. I now want to use it as a backup/supplement to my radiant floor heating. However, when I choose Heat mode I get a flashing A5 error on my thermostat.

What’s the cause of the condition and what’s the remedy?




How many blinks in a row? (post #216496, reply #1 of 2)

How many blinks in a row?

Florida Licensed Building Contractor, 50 years experience in commercial remodeling, new homes, home remodeling and repairs and all types building maintenance.

Low pressure error (post #216496, reply #2 of 2)

Looks like refrigerant pressure.