Giant Fathom E+ 29 (2022) Battery Not Charging (Red Light Blinking)

SDE

Member
Mar 12, 2023
8
2
Ontario, Canada
Hey everyone. We bought this bike new from a bike shop about a month ago and noticed today that it is no longer charging. The LED indicator on the charger is blinking red, denoting some type of error.

1. I have removed the battery from the bike, checked the connectors, inserted it firmly back into place and plugged it in again. It seems with some connecting/disconnecting, I can get the green light to flash enough to get a few percentage points of charge but then it transitions back to blinking red and is no longer charging.

2. I've also hooked the bike up to the app, which shows no errors upon a scan and a healthy battery.

The charger also blinks red sometimes solely connected to the wall socket and not the bike.

Has anyone experienced this? How did you resolve it? For a new bike, this is disheartening.
 
Last edited:

DaveMatthews

Well-known member
Aug 12, 2018
479
323
Vancouver, B.C. Canada
Are you charging the battery in, or out of the bike? Can you try both?

From the manual...
5.3.14444Use of the chargers
4A charger
• EnergyPak not connected:
Charger LED (A) is green (constant).
• During charging:
Charger LED is red (constant).
• Charging issue:
Charger LED is red (blinking).
• Charging is completed (100%):
Charger LED is green (constant).
Smart charger
Normal charge mode (100% charge):
• Power on sequence (self test):
Charger LED 1 (A) is fast red / green /
off.
Charger LED 2 (B) is fast green / red /
off.
• EnergyPak not connected:
Charger LED 1 is red (constant).
• During charging:
Charger LED 1 is green (blinking).
• Charging is completed:
Charger LED 1 is green (constant).
• Charging issue:
Charger LED 1 is red (blinking).
Long term storage charge mode (60% charge):
• Connect charger;
• Press LED 2 button (B);
• Charging procedure is exactly like regular charging, except:
LED 2 is yellow (constant);
Charging will stop at 60% (for long time storage).
 

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