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critical Stanley

Error Code Red LED Indicator

Reverse polarity detected — the unit is connected with incorrect cable polarity (positive and negative reversed).

? What Causes This

Red (positive) clamp connected to negative terminal or black (negative) clamp connected to positive terminal.

✓ How to Fix It

  1. Turn off the jump-starter immediately.
  2. Remove both clamps from the vehicle battery.
  3. Reconnect the red clamp to the positive terminal and black clamp to a metal ground point.
  4. Ensure connections are secure before attempting to start the vehicle again.

This error code appears in:

Stanley FatMax 1200A Jump Starter