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Mini Split A5 Error

richardi | Posted in Energy, Heating & Insulation on

 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?

Thanks,

Richard

 

Replies

  1. florida | | #1

    How many blinks in a row?

  2. mgmahan | | #2

    Low pressure error

    Looks like refrigerant pressure.

    https://www.manualslib.com/manual/730128/Fujitsu-Wall-Mounted-Type.html?page=16

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