Fujitsu HiWall Plasma Inverter Error code 7 red 2 green

Hi,

Does anyone one what this error code means for a fujitsu plasma inverter

7 Red (Operation Light)
2 Green (Timer Light)


The model number is

Indoor Unit: ASTB09LDC
Outdoor Unit: AOTS09LDC


thanks,

Discharge probe getting to hot. Short of gas, head pressure issues, probe/PCB error. Normally caused by short of gas though.