OmniCare EVC System
Installation & Commissioning Manual
82 OmniCare issue 1
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6.4 FAULT FINDING - BATTERY CHARGER
The battery charger used in the OmniCare EVC System system is
not a “Float Charger”.
It is a “Cyclic Constant Current” charger that not only charges the
batteries, but also constantly monitors the condition of the
batteries.
The Battery Charger and Monitoring Conditions are described in
the following sections.
6.4.1 Battery Charger Normal Operation
The Battery Charger initialises when Mains Power is applied or
after the “RESET” button is pressed, and operates as follows:
1. The charger will check to see if batteries are connected.
If batteries are not found, both the “Battery HIGH” and
“Battery LOW” Fault LEDs will be illuminated and the
Charger will be turned off.
2. If batteries are detected, the charger will attempt to charge
them to a nominal 27.6VDC, and then stop charging.
3. The battery voltage is then monitored to assess the condition
of the batteries.
4. The charging process repeats every 6 hours.
If the charging voltage needs to be checked, pressing the “RESET”
button will force the charger to start charging again.
NOTE: To ensure correct operation of the OmniCare EVC System System,
the BATTERIES must always be connected first, BEFORE
the MAINS is applied.
The Charger may display fault LEDs and not charge the batteries
correctly if these power connections are made in the wrong order.
NOTE: If the batteries are in a fully charged state the Charger will only
operate for a few seconds after pressing the "RESET" button.
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