Like what is mentioned below, if you don't have knowledge of chargers do not work on them. There are very large capacitors inside chargers so even if the charger is disconnected you can still kill yourself extremely easily with one small move. Crown has charger technicians who are properly trained to fix these issues.

Non-professionals should not try to open the charger. The charger is connected to the high-voltage part. Improper operation may cause personal injury.
Perhaps can get help here.
https://www.henryuan.com/e_products/24V-Lead-acid-Battery-Charger-8-26.html