Airstage V2 Series, Multi AC System for Buildings. Error Code List for Outdoor Unit: Fujitsu General VRF Error Codes Error Codes Problem - - - - Initial Setting Error 1 3 . 1 Communication Error Between Outdoor Unit 1 4 . 1 Outdoor Unit Network communication 1 Error 1 4 . 2 Outdoor Unit Network communication 2 Error 2 8 . 1 Auto Address Setting Error 2 8 . 4 Signal Amplifier Auto Address Setting Error 5 U . 1 Indoor Unit Error 6 1 . 5 Outdoor Unit Reverse Phase, Missing Phase Wire Error 6 2 . 3 Outdoor Unit EEPROM Access Error 6 2 . 6 Inverter Communication Error 6 2 . 8 Outdoor Unit EEPROM Data Error 6 3 . 1 Inverter Error 6 7 . 2 Inverter PCB Momentary Power Failure Detection 6 8 . 1 Magnetic Relay Error 6 8 . 2 Rush Current Limiting Resistor Temp Rise Protection 6 9 . 1 Outdoor Unit Communication PCB Parallel Communication Error 7 1 . 1 Discharge Temp Sensor 1 Error 7 1 . 2 Discharge Temp Sensor 2 Error 7 2 . 1 Compressor Temp Sensor 1 Error 7 2 . 2 Compressor Tem...