User`s manual

Troubleshooting Troubleshooting
11 – 20
11.2.20 When "UNIT VERIFY ERR." has occurred
The UNIT VERIFY ERR. has occured.
Check the slot where error occurred
with the programming device.
YES
Is the module of
the applicable slot
mounted properly?
NO
Mount the module properly.
Is the ERR. LED of the CPU on?
NO
YES
Are all the extension
cables of the base unit
connected properly?
Connect the extension cable properly.
YES
NO
Replace the
corresponding module.
Normal operation
Normal operation
Normal operation
Completed
Replace the CPU module.
Replace the applicable base unit.
Error detection
Error detection
Error detection
Hardware fault.
Please consult your local Mitsubishi
service center or representative.
If the module on the corresponding slot has been removed/
mounted during operation, reset the CPU module.
If the ERR. LED has not turned off, replace the
corresponding module.
Is the ERR. LED of the CPU on?