Issue:
What can cause AFD Bus Ripple Too High?
Resolution:
This alarm occurs when the DC-link (on the associated AFD) voltage ripple exceeds the drive's capability to safely operate.
The likely cause for this alarm is a blown input fuse to the drive.
- 1F8, 1F10 or 1F12 for 1T1, AFD Circuit 1 compressor 1A
- 1F14, 1F16, or 1F18 for 1T2, AFD Circuit 2, compressor 2A
Notes:
- When replacing blown fuses, make sure the alignment is coplanar (perpendicular to the ground)
- Install both bolts and hand tighten to start. Torque M6 bolts to 52 in-lb
- Make sure to bring up in 10-15 in-lb increments going back and forth between the two bolts until final torque of 52 in-lb is achieved
Changes:
Other Question/Problem/Cause Statements:
- What can cause AFD 1A bus ripple too high?
- Bus ripple too high?
Facts:
- Air-Cooled Chiller (Pueblo) (RTAE)
Document Identifier: DOC-106799
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.