failure mode

FM-05: ONE COMPATIBLE PACK PRODUCES NO LIGHT WHILE OTHERS CHARGE

FM-05 ONE COMPATIBLE PACK PRODUCES NO LIGHT WHILE OTHERS CHARGE

Diagnostic overview

FM-05 ONE COMPATIBLE PACK PRODUCES NO LIGHT WHILE OTHERS CHARGE

Likely Root Causes

  • The rejected battery pack is faulty or deeply discharged
  • Pack contacts are dirty, worn, or electrically damaged
  • Pack protection or temperature sensing is not allowing charge
  • The pack is not actually compatible despite a similar fit
  • The charger interface is marginal with that one pack

Quick Checks

  1. The DCB115 charges a known-good pack and the single refused pack is conclusively isolated, or the charger is routed to FM-01/service.

Repair Preview

Unplug the charger and remove the single rejected pack; inspect it for heat, cracks, swelling, leakage, wetness, burned terminals, or deformation and use FM-17 if any are present.

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

Related symptoms

  • One fully seated, physically sound compatible battery produces no red or yellow light, while the same DCB115 starts charging other known-good compatible packs from the same proven outlet.

    One fully seated, physically sound compatible battery Unplug the charger and remove the single rejected pack; inspect it for

Included in the full manual

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

Public pages show a preview only. Purchase the full manual to download complete repair steps, diagrams, and verification procedures.

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