OPERATION
EN / Chargemaster1 12/35-3, 12/50-3, 24/20-3 & 24/30-3 / August 2009 7
3 OPERATION
3.1 FEATURES
The Mastervolt Chargemaster is a fully automatic battery
charger. This means that under normal circumstances it
may stay switched on with the AC power and batteries
connected. The Chargemaster is suitable for charging of
lead-acid batteries which may include maintenance-free,
low maintenance, AGM/spiral, gel or deep-cycle batteries.
It has an auto-ranging input facility which makes it feasible
to operate on almost any AC power source in the world. It
operates smoothly on both 230V as well as on 120V
without any compromises for the output current. The three-
step Plus charging method guarantees that the batteries
are always charged to 100%.
With an external AC source connected, the Chargemaster
charger also serves the function of an AC to DC converter
to supply DC loads which are connected to the batteries.
3.2 SWITCHING ON / STAND-BY
The Chargemaster is activated by holding the POWER
switch pressed for approx. 3 seconds. The POWER switch
will illuminate green. The state of charge (which is stored
in the memory of the Chargemaster) will be displayed. If
necessary and if AC power is available, the Chargemaster
will start to charge the batteries.
Once switched on, the ChargeMaster
automatically resumes operation after it was
disconnected from an AC-source temporarily.
By pressing the POWER button again for approx. 3
seconds, the Chargemaster will switch back to stand-by:
the Chargemaster stops and the POWER switch
illuminates red.
WARNING
Switching the Chargemaster to “stand-by”
does not cut off the connection to the batteries
or the AC-source. This means that voltages
are still available inside the apparatus.
If the Chargemaster was switched to stand-by or AC
power became unavailable, the POWER switch starts to
blink red. After approximately 2 minutes the blinking will
stop and the display will switch off, thus preventing battery
load by the indication light.
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