ABB AC 800M, Hardware And Operation

Page: 127 / 230

Section 5 Maintenance Corrective Maintenance Procedures
3BSE 027 941 R301 127
6.
Reconnect the Power Supply Socket to the new processor unit.
7. Reconnect the optical ModuleBus and RCU Link Cable.
8.
Press the INIT push button on the replaced processor unit. Observe the
startup procedure and make sure that Dual mode is reached, that the
Dual LED is lit on both processor units.
Corrective Maintenance Procedures
Changing Fuses – ModuleBus and CEX-bus
To change the TP830 internal ModuleBus and CEX-bus fuses:
1. Using a blade screwdriver, release the two spring-loaded captive screws on the
PM8xx cover.
2. Carefully remove the processor unit
3. Identify both the ModuleBus and CEX-bus fuse-holders to the right on the
TP830 Baseplate.
– Upper Fuse-holder – ModuleBus – fuse 2AF
– Lower Fuse-holder – CEX-bus – fuse 3.15AF
4. Using a blade screwdriver, carefully unscrew the fuse-holder containing the
defective fuse.
5. Remove the fuse.
6. Insert a new fuse and replace the fuse holder.
– Upper Fuse-holder – ModuleBus – fuse 2AF
– Lower Fuse-holder – CEX-bus – fuse 3.15AF
7. Replace the processor unit and tighten the cover screws.
The just replaced (broken) CPU might still have the IP address of the primary
CPU. If it, for example, is installed later on for testing on the same control
network it might disturb the communication to the active system running the
application. Therefore used the IP Config tool to modify the IP address of the
just replaced CPU immediately.