MultiPlus-II 2x120V 3. Operation 3.1. On/Off/Charger Only Switch When switched to ‘on’, the inverter/charger is fully functional. The inverter will come into operation, and the LED ‘inverter on’ will light up. An AC voltage connected to the ‘AC in’ terminal will be switched through to the ‘AC out’ terminal, if within specifications. The inverter will switch off, the ‘mains on’ LED will light up, and the charger commences charging. The ‘bulk’, ‘absorption’ or ‘float’ LEDs will light up, depending on the charger mode. If the voltage at the ‘AC-in’ terminal is rejected, the inverter will switch on.
When the switch is switched to ‘charger only’, only the battery charger of the inverter/charger will operate (if mains voltage is present). The input voltage is also switched through to the ‘AC out’ terminal in this mode. NOTE: When only the charger function is required, ensure that the switch is switched to ‘charger only’. This prevents the inverter from being switched on if the mains voltage is lost, thus preventing your batteries from running flat. 3.2.
Remote control The inverter/charger can be remotely turned on or off via a switch connected to the remote on/off terminals, or it can be turned on, off, or set to charger-only mode via a Digital Multi Control panel or a virtual switch (for example, through Remote Console or VRM). The Digital Multi Control panel has a simple rotary knob with which the maximum current of the L1 AC input can be set. This does not affect the L2 AC input: see PowerControl section in the "other features" chapter . 3.3. Equalisation and forced absorption 3.3.1. Equalisation Traction batteries require regular additional charging.
In the equalisation mode, the inverter/charger will charge with increased voltage for one hour (1V above the absorption voltage for a 12V battery, 2V for a 24V battery and 4V for a 48V battery). The charging current is then limited to 1/4 of the set value. When equalisation mode is activated, the ‘bulk’ and ‘absorption’ LEDs flash intermittently. Equalisation mode supplies a higher charging voltage than most DC-consuming devices can cope with. These devices must be disconnected before additional charging takes place. 3.3.2. Forced absorption Under certain circumstances, it can be desirable to charge the battery for a fixed time at the absorption voltage level.
In Forced Absorption mode, the MultiPlus-II will charge at the normal absorption voltage level during the set maximum absorption time. When Forced Absorption mode is active, the ‘absorption’ LED is illuminated. 3.3.3. Activating equalisation or forced absorption The inverter/charger can be put into both these states from the remote panel as well as with the front panel switch, provided that all switches (front, remote, and panel) are set to ‘on’ and no switches are set to ‘charger only’. The procedure below should be followed to put the inverter/charger in this state. If the switch is not in the required position after following this procedure, it can be switched over quickly once.
This will not change the charging state. Switching from ‘on’ to ‘charger only’ and back, as described below, must be done quickly. The switch must be toggled such that the intermediate position is 'skipped', as it were. If the switch remains in the ‘off’ position even for a short time, the device may be turned off. In that case, the procedure must be restarted at step 1. A certain degree of familiarisation is required when using the front switch on the Compact in particular. When using the remote panel, this is less critical. Procedure: 1. Check whether all switches (i.e. front switch, remote switch or remote panel switch if present) are in the ‘on’ position. Page 5 Operation