Husqvarna 550iBTX Workshop Manual page 21

Symptom
A green lamp on the charger comes
on for approximately 5-10 seconds
when the battery is attached. After
that a red warning sign flashes on the
charger. This sequence then occurs
again.
761 - 002 - 18.11.2019
Possible causes
Defective Battery.
Defective charger.
Recommended step
Put the battery in a QC330 charger. If
the same problem occurs, replace the
battery.
Put a battery in the charger. If the
same problem occurs, replace the
charger.
Troubleshooting - 21