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Lithium Iron Phosphate Battery technology - off gride

Q5: Welcome to Off Grid living.

Today is MARCH 5 2026, day 20 of the air con.

The temperature of the cooling fins is 13 degrees.

The temperature inside the cool room is 10 degrees.

The condenser is at 21 degrees.

The ambient temperature is 22 degrees. (This is confirmed later by a outside temperature reader of mine 21.8 degrees)

The pressure switch valve is on 100 Pls I have seen this rise as high as 150 Pls - so not sure of its max value?

Yesterday I observed this, the unit was on 7 degrees, but the machine was working hard, 25 amps (around 600W) and the air coming out the duct pipe was 4 degrees higher than ambient temperature.

History shows 3 P6 faults yesterday.

  • 10 am
  • 1 pm
  • 3 am

    It's 7:00 am now, and I am waiting for the machine to cool down - ie rool temp to be 15 degrees, so the unit can work again.

    I show parm settings (not changed by me) so engineer might see something odd?

    Nothing means anything to me?

    ?

    ??

    When you press defrost....

    and click yes

    Nothing happens?

    I have never seen a defrost symbol come on.

    Ambient temperature is 22 degrees.

    As the machine also says.

    Amps in from solar panels at 6:00 am in the morning is 2.9 Amps.

    The air con is ON but nothing is running, and the inverter is using 1.5 Amps, when ON.

    The make the unit work again,

  • I switch it off at the powerpoint
  • listen for a clunk, when console light dies
  • And switch the powerpoint on again
  • I hear "click click click" a few times
  • and than quiet
  • and it all is well the unit fan symbol comes on

    followed quickly by the condensor symbol.

    HOWEVER, I went down to the building and found it running all by itself !!!!

    Cooling temperature is at 0 degrees.

    That is low enough to make ice....

    Room tempaterature is 7 degrees.

    Condenser is 29 degrees, working hard to make coolant into a liquid?

    Ambient temperature is 23 degrees.

    The pressure switch valve is 270 Pls ? hmm? when does this become too high?

    The faults still register, even though its working again?

    So I cleared the screen for today.

    AND so it is running again all by itself.

    Amps in 19 Amps out 15

    Voltage is 26.4 around 40% fully charged.

    Now on the unit interface is a warning.

    I have never seen my machine do a defrost ever

    Let alone every 5 to 6 hours.

    If this was done by the machine, the icing would go away and so would the rising pressure switch valve problem?

    How do I set the machine to defrost 4 times a day?

    Shalom

    Li-Fe PO4 battery technology

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