failure mode

FM-18: FM-18 EXTERNAL CONTACTS ARE BENT, RECESSED, PITTED, OR CORRODED WHILE THE PACK IS COOL AND DRY

FM-18

Diagnostic overview

FM-18

Likely Root Causes

  • Impact or forced insertion damaged a contact
  • Arcing or poor seating pitted a contact
  • Moisture left dry corrosion residue
  • A receiver contact pushed or loosened the pack contact

Quick Checks

  1. No damaged contact is returned to powered service; the pack and any damaging receiver are replaced or professionally cleared.

Repair Preview

1.

This is a preview of the troubleshooting guidance included in the full repair manual.

Related symptoms

  • With the pack removed and cool, one or more accessible power, signal or temperature contacts are visibly bent, pushed in, pitted, loose or corroded, with no active heat, smoke, liquid or melting.

    With the pack removed and cool, one or more accessible 1. Remove the battery from all devices and place it on a nonconductive surface

Included in the full manual

  • root cause analysis
  • tools needed
  • step-by-step repair procedure
  • diagrams
  • exploded views
  • post-repair checks

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