Dear all,

 I am facing problem in s120 drive with CU320. it was already commissioned running well but sometimes when 24V supply getting off after switch power CU showing F7800 fault that means power unit missing same one was already running. i was tried as much as possible changing drive cliq cable and topology changing no use for that please give suggestion for that one.

Hello,

have you solved the problem with the F7800 after powerless?

I have the same problem and could need some help...

Thank you!

Hello

I have same problem F7800 since the device was first put into operation

but I only experience this problem when I first power up in cold weather. Everythink is normal in summer.

We can reset the device after warming it up with a heater for 1 hour.

should I replace the CIM DAC module?

Thanks