A/C problems in the heat of Louisiana

I have a 06 e55amg. Had ac compressor kit changed had freon circulated by machine and ac ran cold for 2 days and then started blowing hot again. took it back to shop and was told I have ac module fault codes 9205, 9440, 9450, 9460 and 9100 but they weren't able to access code info and referred us to another shop that wants to charge more money to read codes. Just want to know if there's any info about this available before I have to spend more money