I cannot operate the keys in keypads for two LC-20AD pump and for SIL 20A autosamples. It means I cannot run all keys in the keypads of two pumps and on autosamples. But I can operate these two pumps and and autosamples through a computer(remote mode). I try to use "key close" command for pumps and autosamples to release the closed key. But I cannot get any response. I suspect there is something wrong with the CBM 20 system
controller.Does anyone know how to solve this issues?

Thanks.