Start Charging; Charging Phases - CTEK XC 800 User Manual

Start charging

1. Once you have checked that the battery leads have been connected correctly, you can start
charging by connecting the charger to the wall socket. If the battery leads have been connected
incorrectly the polarity reversing protection will ensure that neither the charger nor the battery
will be damaged. The fault indicating lamp will then come on. If this is the case, start from
point 1 under "Connecting the charger..."
2. The charging lamp or the maintenance charging lamp will now come on. When the
maintenance charging lamp comes on the battery is fully charged. When the battery's voltage
drops the charger will send a pulse to the battery. The pulse length depends on how much the
voltage has dropped. The charger can be connected for months.
3. If nothing happens. If none of the lamps come on this may be due to the connection to the
battery or chassis is poor or that the battery is faulty or has a too low terminal voltage. Another
cause may be a lack of voltage in the wall socket..
4. Charging can be stopped at any time by disconnecting the charger's power cord. Always
disconnect the power cord before disconnecting the battery leads. When you stop charging a
you disconnect the other battery lead.
the following:
•
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and may need to be replaced.

CHARGING PHASES

CTEK XC 800 has a four step fully automatic charging cycle IUoUp. At the start of charging
the battery charger delivers maximum current to the battery and the battery voltage increases
constantly to a set level of 7.2V. At this point the voltage will be regulated and kept constant
while the charging current is successively lowered. Once the charging current has dropped
below 0.4A the charger switches to maintenance charging.
If the battery is loaded and the battery's terminal voltage drops to 6.45V the charger automati-
cally switches back to the beginning of the four step cycle. The charger requires a reverse
voltage from the battery of at least 3.7V to start the charging cycle, this means that if the battery
is so deeply discharged that the terminal voltage is lower than 3.7V the charger cannot charge
the battery in question. A normal discharged battery has a terminal voltage of 5.3V.