fujitsu split a/c icing up

[Learner]

If the installer is telling you that it is normal then he is full of crap. It is definitely not normal.

Yes he is

[Timmo]

My opinion is the refrigerant has a possible imbalance. 410a is a near azeotropic (the two components act the same causing no glide as long as it's in the right proportions) blend of r32 and r125 . If the system is dominated by either of these, the operating pressures change significantly.

another thing to check is the evap fan. these are usually a shaded pole or brushless dc motor and a stiff bearing can really slow it down, causing the evap pressure to drop below 700 kpa causing the ice up.

First thing i'd check is the suction pressure and superheat. High superheat- underfed coil. low superheat-low airflow.

[Honorary Bloke]

First thing i'd check is the suction pressure and superheat. High superheat- underfed coil. low superheat-low airflow.

First thing I'd check is why he is running his AC in the dead of Winter in Massachusetts in the US? Aha! This is a Lazarus thread, breathed back from the dead of 2006! Hopefully, he has it sorted by now.

[Learner]

First thing I'd check is why he is running his AC in the dead of Winter in Massachusetts in the US? Aha! This is a Lazarus thread, breathed back from the dead of 2006! Hopefully, he has it sorted by now.