fault code

HI Guys,
Any one came across a mithsuvita wall type.Error code is E5.It is correctly charged.Condenser fan motor running fine,compressor the same.I first suspected the indoor coil thermistor but has nothing to check against.I tried even removing thermistor temporarily from holder but did the same.Any ideas what can be the cause of error.
Thanks

Sorry, can't find that manufacturer name anywhere.

can it be a KFR ! Since here in Malta some are importing without name and naming their a/c . That's a good fraud ! I thank you and will try and get in detail more on the brand.