Room dedicated air conditioning, evaporator icing caused by what causes, please master guiding. Thank you.
2 return air temperature setting temperature is too low, the indoor temperature is too low, re-adjust the set temperature
1 air volume is small, the air temperature is low, evaporation pressure drop, check the fan, cleaning air filter and evaporator
3 refrigerant is too small to add refrigerant 4 expansion valve or filter block replacement .5 unit design problem
