ℹ
info Craftsman
Status Red LED on
Fast charging mode is active. The charger is currently charging the battery pack at a fast rate.
? What Causes This
Normal charging operation initiated when a discharged battery pack is inserted into the charger.
ⓘ What This Means
This is normal operation. Allow charging to continue. The red LED should remain on for approximately 1 hour, then the green LED will come on when charging is complete.
Source: page 9 of the official manual
From the manual
This error code appears in:
Craftsman 973.113450 Cordless Drill/Driver