Low-Battery Voltage Condition - Centurion D2 Turbo Installation Manual

Procedure A - Low-battery voltage condition
Status light flashes three times
If the battery voltage is less than 10.5V, the motor will not operate at all. For any other
voltage, the battery could still be the cause of the problem. Check that the battery is
being properly charged.
Check that the mains power is turned ON (measure 90V - 240V AC on the mains

connector for the D2 Turbo, or 10V - 20V AC/10V - 28V DC for the D2 Turbo Low-
Voltage)
Check the condition of the battery leads, terminals and connectors. Look for and

correct all loose connections and signs of corrosion
The battery might be discharged. Measure the battery voltage with the charger

connected; if the voltage is below 12.5V then the battery is discharged. The number of
opening cycles per hour may be excessive, thus discharging the battery. Charge the
battery if required
The onboard charger might be faulty. Disconnect the battery, and measure the voltage

on the battery leads.
It must be between 13.6V and 13.8V. If not replace the controller
 Battery may be old, and might have to be replaced. If in doubt test as follows:
Check that the battery is charged by ensuring that the battery voltage is above

13.5V with the onboard charger connected. (If the battery is in a good condition it
would probably pass the test without being fully charged)
 Isolate the mains from the controller
Remove the DC motor leads from the DC Controller

Apply the DC motor leads directly to the battery, while measuring the battery

voltage
First make sure that the moving gate will not pose any danger.
If the gate does not move, the battery or motor could be faulty

 If the battery voltage remains unchanged, then the motor is faulty and must be
serviced. If the battery voltage drops to below 11.2V then the battery must be
replaced
Before replacing the battery, measure the charging voltage on the battery.

Leads with the battery disconnected. It must be between 13.6V and 13.8V.
If not, replace the charger.
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