Afternoon all,
Has anyone got any ideas on this issue, I was called to a multisplit midea unit the other day with reports of the units not working in heat and constantly in defrost.
The office was at 18 in the morning and they set the unit to 23, when I arrived (late afternoon) the room was only at 19.
No faults and no errors on indoor or outdoor, run unit in forced cooling and the pressures were
L-7bar and H-10bar cooling fine, when switching to heating both pressures at 30bar, my initial thought was 4 port valve not sliding over properly, I tested the temps on the valve and going by the temps recorded the valve seems to of fully changed over.
Tested the 4 port valve with a magnet and it seems to work but I'm concerned with the equal high pressures when on heat.
Technical were stumped too.