Allen-Bradley 8720MC-RPS065 - Page 107

Rockwell Automation Publication 8720MC-RM001K-EN-P - September 2018 107
Troubleshoot the 8720MC-RPS Unit Chapter 8
Figure 48 - DC-bus Fails to Energize
Yes
No
Yes
No
Yes
No
DC-bus voltage
is not present.
Check the following:
• Wiring to the main power supply
• Main magnetic contactor
•Protection fuse
Is the wiring correct?
Is the POWER status
indicator ON?
Are parameters
set correctly?
The 8720MC-RPS unit is
defective. Replace the unit.
The 8720MC-RPS unit is defective.
Replace the unit.
Check the following parameters:
• Unit Selection (F.001)
• DC-bus Voltage Reference (U.000)
• FWD Current Limit (U.001)
• REV Current Limit (U.002)