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10 en | Troubleshooting Battery charger modules
2018.05 | 4.0 | F.01U.036.305 Installation manual Bosch Security Systems, Inc.
5 Troubleshooting
The LED on the module is used to indicate the operational status of the Battery Charger. The
following table describes the different states of the LED.
Symptom Diagnosis Remedy/description
LED color LED status
Green ON AC transformer power present No action
OFF AC transformer power not
present
– Check if the Transformer
is plugged into a non-
switched outlet.
– Check 120 VAC supply to
outlet.
– Check if transformer has a
faulty secondary; fuse may
be blown.
Tab. 5.2: LED status troubleshooting
To insure the module is not faulty, meter the battery leads of the module. A reading of
13.80
VDC or higher indicates the unit is functioning normally.
6 Specifications
Electrical
Float Voltage 1 13.9 VDC maximum
Supplied Voltage 16.5 VAC, 40 VA supplied by D1640 plug‑in transformer
Supplied Current 1.2 A
Ampere-hours 27 Ah maximum
1 measured with batteries in circuit
Mechanical
Dimensions (HxWxD) 0.75 in. x 3.0 in. x 5.0 in. (1.9 cm x 7.6 cm x 12 cm)