Rockwell Automation SA500 AC Power Modules - Manual (Page 50)

5-4 SA500 Power Modules
PMI Communication Warning (Bit 15)
Bit 15 will be set if a fiber-optic communication error is detected between the PMI and
the UDC module. Communication errors in two consecutive messages will cause a
drive fault.
5.3 Power Module Failure
The SA500 Power Module has no user-serviceable parts with the exception of the rail
fuse described in section 2.2.2. If the Power Module malfunctions and the cause
cannot be determined using the LEDs, the Drive Fault register, or the Drive Warning
register, the Power Module must be replaced.
Refer to chapter 4 of this manual for the guidelines to be followed when installing a
new Power Module.