8
Mass Combi Pro 12/3000-150, 24/3500-100
– User and Installation Manual
3-Step+ charge system is also safe for all the connected
equipment.
3.2.2
Temperature compensated charging
The Mass Combi Pro is delivered with a battery
temperature sensor. By installing this battery temperature
sensor (for Lead Acid batteries only) the charge voltages
are automatically adapted for deviating temperatures.
When the battery temperature is low, the charge voltage
increases. On the other hand, when the battery
temperature is high, the charge voltage is decreased.
Overcharge and gassing are prevented this way. This will
extend the life of your batteries.
Temperature compensated charging cannot
prevent
the
batteries
from
overcharging
situations.
3.2.3
Silent mode
When the Mass Combi Pro is in operation, the cooling fans
produce audible noise. In silent mode the noise level is
reduced. As a result:
the charge current may be limited;
the charging time may increase.
3.3
Inverter
3.3.1
General
The inverter provides voltage and frequency regulated AC
power from a battery bank. Fast acting electronic circuits
protect the inverter against extreme overloads, low and
high battery voltage and overheating of the inverter.
A large momentary surge power is available for inductive
loads, such as electric motors.
3.3.2
Energy saving mode (selectable)
In the inverter mode the Mass Combi Pro has a built-in
automatic energy saving feature that reduces battery
power consumption when no load is present on the
outputs. Response from idle is instant. In most cases the
operation is not noticeable. The energy saving mode can
be set by means of MasterBus or dipswitch A4, refer to
chapter 6, Configuration.
The Mass Combi Pro scans the AC outputs with pulses of
230 V every 2½ seconds. When it detects a load that is
larger than 50 W (adjustable), it switches On the inverter
automatically.
Small loads such as clocks in VCR’s or micro
waves are most likely not to work in this mode.
3.4
Operation modes
The Mass Combi Pro is not just a combination of an
inverter and a battery charger. Many additional features
help to increase the total available AC power. In the next
sections, nine different main operation modes are
described. Most of these modes can be combined, refer to
section 3.4.10. You can enable these modes by means of
front switch, DIP switches or the MasterBus user interface.
All modes are enabled by default except for the Gen/Mains
supporting mode as there are regulations in some
countries that do not allow this. After enabling by the user,
becoming “active“ of a mode is determined by the Mass
Combi Pro itself based on AC and DC power availability,
battery state of charge and configuration (Chapter 6,
Configuration).
3.4.1
Inverting mode
See figure 3-3. When there is no external AC power
available, the inverter of the Mass Combi Ultra provides AC
power on the AC outputs.
Figure 3-3: Inverting mode
3.4.2
Charging mode
See figure 3-4 and 3-5. When external AC power comes
available on the Mains- or Gen input, the main battery will
be charged and the AC outputs are supplied by the
external power.
