Allen-Bradley The PowerFlex 755 On-Machine, User Manual

Page: 202 / 218

202 Rockwell Automation Publication 750-UM006C-EN-P - March 2022
Chapter 7 Periodic and Preventive Maintenance
Maintenance After a Fault Condition — An open short circuit protective
device (such as a fuse or circuit breaker) in a properly coordinated motor
branch circuit is an indication of a fault condition in excess of operating
overload. Such conditions can damage control equipment. Before restoring
power, the fault condition must be corrected and any necessary repairs or
replacements must be made to restore the control equipment to good working
order. Make sure that the parts are properly matched to the model, series, and
revision level of the equipment.
Keep Good Maintenance Records —This rule is most helpful to locate
possible intermittent problems by pointing to a particular area of constant
trouble within the overall system. Furthermore, good maintenance records
reduce major costly shutdowns by demanding the use of proper test equipment
and an appropriate inventory of spare parts.
We recommend that a complete record of parameter settings be kept close to
the drive for future reference. Some drives also incorporate an operator
interface that can store a copy of the parameter setting.
Table 11 - Recommended Drives Maintenance Tasks and Schedule
IMPORTANT Duty cycle, load profile, temperature, altitude, incoming line conditions,
and other operating/environmental conditions greatly affect reliability of a
drive.
Years > 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Components and Activities
Air-cooling
System
Main Heatsink
Fan
Assembly
(1)(2)
I I I I R I I I I R I I I I R I I I I R
Terminal
Wiring Cables and
Connectors I/M I/M I/M I/M I/M I/M I/M I/M I/M I/M I/M I/M I/M I/M I/M I/M I/M I/M I/M I/M
Enhancements Firmware - - Rv - - Rv - - Rv - - Rv - - Rv - - Rv - -
Hardware - - Rv - - Rv - - Rv - - Rv - - Rv - - Rv - -
Operational
Conditions Parameters I I Rv I I Rv I I Rv I I Rv I I Rv I I Rv I I
Application
Concerns
(3)
I I Rv I I Rv I I Rv I I Rv I I Rv I I Rv I I
Spare Parts Spare Parts
and Inventory/
Needs
(4)
I I Rv I I Rv I I Rv I I Rv I I Rv I I Rv I I
Internal
Components Electrical
wiring
(5)
I I I I I I I I I I I I I I I I I I I I
Covers / Doors Seals I I I I R I I I I R I I I I R I I I I R
Ground Ground I I I I I I I I I I I I I I I I I I I I
(1) Inspect and clean screens every 3 months or more frequently, depending on the environment.
(2) Use
00:469 [PredMaint Sts] to monitor predictive maintenance for the Frame 2 drive.
(3) See Wiring and Grounding Guidelines for Pulse-width Modulated (PWM) AC Drives, publication DRIVES-IN001 .
(4) See the associated chapter or section for the list of parts.
(5) Inspect wire connections.