Remove and Install the Control Transformer Fuses (FH4) for
Frame 7L

Replace control transformer fuses (labeled FH4) with the appropriate kit catalog number that is identified in this table:
Cat. No.
Voltage Class
Fuse Amp Rating
SK-RM-IBFH4-FUSE5A-F7
400V/480V/600V
17.5
The fuse holders (labeled FH4) are on the AC precharge control panel. Follow these steps to remove the control transformer fuses.
  1. Review the product advisories in Before You Begin.
  2. Remove power from the system.
  3. Open the enclosure door.
  5. Pull out on the tabs at the top of the fuse holder that is labeled FH4 and remove the fuses.
    example of how to remove the frame 7 and 7L control transformer fuses
  6. Install the control transformer fuses in the reverse order of removal.
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