MP301 SC622

[tufbnme]

Book says this:
Bank communication error
1. Malfunction occurs on line
connection.
2. Receiving a communication error
notice from the URAT.
 Defective the bank control board
 Defective the BICU, the IOB
 Bad connection between the
bank and the main machine
 Defective the bank control

Can someone tell me what exactly this means?

[slimslob]

The main frame cannot communicate with one (or both) paper tray unit(s). It could be that one of the boards mentioned is defective, connector of a tray unit is damaged or you have tried to install more than 2 tray units.

[Iowatech]

It could be that one of the boards mentioned is defective

Or a connector on one of the boards is unplugged. That bit me in the sitting muscles a couple of times when replacing clutches on older machines.