How does the EST3 perform battery testing, and what does a battery trouble after installing new batteries indicate?

The EST3 performs battery testing through automated monitoring and manual technician procedures. The system automatically identifies defective power supplies and annunciates troubles if battery voltage drops below 18 Vdc or if the charger fails to reach 80% capacity within 24 hours (Page 223, 257, 258) [1].

Manual testing involves disconnecting AC power to ensure the batteries sustain a full alarm load for 5 minutes-or 15 minutes for audio-while maintaining a voltage between 20.4 and 27.3 Vdc (Page 167, 246) [1].

A trouble signal after installing new batteries typically indicates:

1. Connection Sequence: Batteries were connected before AC power was energized (Page 182, 258) [1].

2. SDU Configuration: The battery size (Ah) or type selected in the SDU does not match the installed hardware (Page 182, 257) [1].

3. Hardware Faults: A blown 8A F1 fuse on the power supply or incorrect wiring (Page 257, 258) [1].

4. Voltage Level: The new batteries are defective or their charge is currently below 18 Vdc (Page 258) [1].