Hi how are you, these are Saivod greetings errors. F4: Outdoor evaporator sensor / short 4 6 seconds pause before Flash Sequence F3: Outdoor temperature sensor / short 3 H3: compressor overload protect 3 Compressor stops working when the compressor temperature is higher than regulated. Without having seen the machine do you think it is due to a lack of gas? I leave the resolution of errors in case someone needs it. E1 Protect High Pressure 1 This is a sensor on one side of the pipe.Once escape the pressure of the exhaust pipe exceeds 3.15Mpa, the air conditioning system stops working. E2 Inside antifreeze Protect 2 Sensor of the indoor unit dects the evaporator temperature continuously, once the temperature is below a certain point of time, the system will shut down to prevent freezing of the indoorunit. E3 Low pressure protection 3 For the low pressure sensor system (locate on one side of the inspiration tube), once the pipe pressure is less than 0.15Mpa, the system will stop working. E4 Compressor discharge protect 4 6 seconds from pause before Flash Sequence Once the compressor exhaust temperature is higher than regulated, the system will shut down automatically. E5 lowers pressure on current protect 5 Once the current system is higher than it regulates, the system stops. E6 Internal and external communication error 6 Bad communication between indoor and outdoor units. E7 Conflict Mode 7 For Multi Split air conditioners, when one of the interiors is working to cool (dehumidification), another indoor unit may not work for heating. E8 high temperature protects 8 While heating, the inner tube temperature sensor is detected E9 protect cold wind 9 While it is warming up, the indoor fan will run several minutes later than the compressor so that the air flow from the air conditioner will not be too cold. E0 Low voltage AC 10 For the inverter system, the frequency will drop down when the voltage drop sharply, so that the current can be kept stable. H6 No comments, interior engine 11 F1 Room temperature sensor open / short 1 Temperature sensor defect inspection. F2 Evaporator sensor open / short circuit 2 F3 Outdoor temperature sensor / short 3 F4 Outdoor evaporator sensor / short 4 6 seconds pause before Flash Sequence F5 Outdoor / short 5 sensor F6 Overload Cooling 6 For inverter, while cooling, the outer tube temperature sensor continuously detects the temperature and lowers the working frequency, if the tube temperature exceeds a certain point of time. F7 Not used 7 For inverters only.After a cooling period, the system will operate at the highest frequency for a period. F8 Current Overlaod 8 For investors only. Lower the freqecy, reduce the load if the current is greater than the standard. F9 Not used 9 For inverters only. Under frequencies, if the exhaust temperature is higher than the standard. F0 Not used 10 H1 Defrost 1 Under heating conditions, defrost auotmatically and keep the heat exchange efficeincy. H2 Static clean duct protect 2 H3 compressor overload protect 3 Compressor stops working when the compressor temperature is higher than regulated. H4 Abnormal System 4 While cooling, the system stops if the temperature of the outer tube is above a certain point of time. While heating, the system stops if the temperature of the inner tube is higher than a certain point of time. H5 Protection mode 5 For inverters only. H6 Not used 6 6 seconds pause before Flash Sequence H7 Synchronize fail 7 H8 Full protection water 8 For the water pump system, such as cassette airconditiners, the system stops working when the water level exceeds the regulated level. H9 Heating error 9 HO High temperature heat protects 10 for inverters only. While heating, reduce the frequency if the temperature of the inner tube is higher than the standard. FA Hot Pipe For inverters cooling only.While, lower the frequency if the outside tube temperature is higher than the standard. FH Freeze Protect Only for investors. While cooling, the lower frequency if the inner tube tempearture is lower than the standard