POWX4207 EN
Copyright © 2021 VARO P a g e | 5 www.varo.com
▪ The RECOND program is intended to be used only for bringing lead acid batteries (not for
AGM and GEL batteries) which have undergone exhaustive discharge back to life. Only
use this program for a short time and under supervision.
7.2 Automatic charging
The charger is a microprocessor controlled automatic charger, i.e. it is suitable in particular for
charging maintenance-free batteries and for the long-term charging and maintenance-charging
of batteries which are not in constant use, e.g. for classic cars, recreational vehicles, lawn
tractors and the like. The integrated microprocessor enables charging in several steps. The
final charging step, maintenance charging, maintains the battery capacity at 95–100% and
therefore keeps the battery fully charged at all times. The charging operation does not need to
be monitored. However, do not leave the battery unattended if you charge it over an extended
period of time, so that you can disconnect it from the mains power supply in the event of a
fault in the charger.
7.3 Explanation of the symbols (fig.1)
▪ A Charging a 12V battery (lead acid battery and GEL battery).
▪ B Charging a 12V AGM battery.
▪ C Charging a 12V battery (lead acid battery, AGM battery and GEL battery) in winter
mode with an ambient temperature of – 20°C to +5°C.
▪ D Charging a 12V battery (lead acid battery, AGM battery and GEL battery) in charge
maintenance mode.
▪ E Charging voltage in volts, faulty battery (BAt) / fully charged (FUL) / connected with
reverse polarity or short-circuit at the clamps (Err)
▪ F Restoration of the charging capability of discharged lead acid batteries with higher
charging voltage
▪ G Clamps are wrongly connected (reverse polarity) or there is a short-circuit
▪ H Power supply, e.g. when changing a battery
▪ K Charge status of the battery in percent (1 increment = 25%) and charging process
(increment lit = the battery has reached the charge level shown; increment in the battery
symbol flashes = the battery is being charged to the next charge level; all increments are
lit = the battery is fully charged).
7.4 Charging settings
▪ Press the “Mode” button (1) to switch to the various programs. The symbol for the
applicable program will appear in the display. The batteries will be charged using the
program which is displayed.
▪ To go to the RECOND program, press the “Mode” button for 5 seconds.
▪ To get back to the 12V STD program from the RECOND program or the SUPPLY function,
also press the “Mode” button for 5 seconds.
▪ If the voltage of the battery is less than 3.5 V or more than 15 V, the battery is either not
suitable for charging or it is faulty. The message “BAt” will appear in the LCD display. The
“G” symbol will flash. It is also possible that other battery errors or faults can mean that the
battery cannot be charged.
▪ If there is a short-circuit between the charging terminals while the SUPPLY function is on,
the message “Lo V” will appear in the LCD display. The “G” symbol will flash.
▪ When the charger is disconnected from the socket outlet, the last charging program to
have been set will be saved (apart from RECOND and SUPPLY) and will be the default
program the next time the charger is used.
▪ When the charger clamps are connected to the battery, the charger draws a very small
amount of electricity from the battery and the LCD display comes on briefly. This is not a
fault.
