Dometic BUTTNER MT BCB30/30/20 IU0U User manual

MT BCB30/30/20 IU0U, MT BCB40/40/30 IU0U, MT BCB60/40/40 IU0U
Battery control booster
Installation and Operating Manual. . . . . . . 14
Batterie-Control-Booster
Montage- und Bedienungsanleitung . . . . .36
Chargeur de batterie
Instructions de montage
et de service . . . . . . . . . . . . . . . . . . . . . . . . .59
Booster di controllo della batteria
Istruzioni di montaggio e d’uso . . . . . . . . .83
Accuregelbooster
Montagehandleiding en
gebruiksaanwijzing . . . . . . . . . . . . . . . . . . 107
Batteristyreboosteren
Monterings- og betjeningsvejledning . . . 130
Batteristyrningsförstärkare
Monterings- och bruksanvisning . . . . . . . 152
Batterikontroll-booster
Monterings- og bruksanvisning. . . . . . . . 174
EN
DE
FR
IT
NL
DA
SV
NO
POWER & CONTROL
CHARGER

© 2022 Dometic Group. The visual appearance of the contents of this manual is
protected by copyright and design law. The underlying technical design and the
products contained herein may be protected by design, patent or be patent
pending. The trademarks mentioned in this manual belong to Dometic Sweden AB.
All rights are reserved.

4445103619 3
1
2
4 3
5
6
7
1
8 7 6 5 4 3 2 1
910
13 12 11
2

4 4445103619
3
2
1
100 mm
100 mm
4
5

4445103619 5
14
U (V) I (%)
12
10 100
50
5
0
U1I
<75%<10% <100% 100% 100% 100%
U2 U3 U1
1h
U
I
t
6
12,5
13,0
13,5
14,0
14,5
15,0
-20 -10 0 10 20 30 40 50 60
U1
U1
U2
U3
U2
U3
°C
V
7
12,5
13,0
13,5
14,0
14,5
15,0
-20 -10 0 10 20 30 40 50 60
U1
U2
U3
U2
U3
U1
°C
V
8
12,5
13,0
13,5
14,0
14,5
15,0
-20 -10 0 10 20 30 40 50 60
U1
U1
U2
U3U3
U2
°C
V
9
12,5
13,0
13,5
14,0
14,5
15,0
-20 -10 0
,,,
10 20 30 40 50 60
U1, U2
U3
°C
V
0

6 4445103619
12,5
13,0
13,5
14,0
14,5
15,0
-20 -10 0
,,,
10 20 30 40 50 60
U1
U3
U2
°C
V
a
12,5
13,0
13,5
14,0
14,5
15,0
-20 -10 0
,,,
10 20 30 40 50 60
U1
U3
U2
°C
V
b
12,5
13,0
13,5
14,0
14,5
15,0
-20 -10 0
,,,
10 20 30 40 50 60
U1
U3
U2
°C
V
c
12,5
13,0
13,5
14,0
14,5
15,0
-20 -10 0
,,,
10 20 30 40 50 60 °C
V
d

4445103619 7
1.
2.
3.
90°
e
2. 3.
5 m
1.
5 m
4.
5.
5 m
f

8 4445103619
EN DE FR IT NL DA SV NO
rd Red Rot Rouge Rosso Rood Rød Röd Rød
bk Black Schwarz Noir Nero Zwart Sort Svart Svart
rd
D+
,, ,
5 A
rdbk
+-+-
2
3
1
A
g

4445103619 9
EN DE FR IT NL DA SV NO
rd Red Rot Rouge Rosso Rood Rød Röd Rød
bk Black Schwarz Noir Nero Zwart Sort Svart Svart
rd
D+
,, ,
5 A
rdbk
+-+-
2
43
1
B
5
h

10 4445103619
EN DE FR IT NL DA SV NO
rd Red Rot Rouge Rosso Rood Rød Röd Rød
bk Black Schwarz Noir Nero Zwart Sort Svart Svart
vt Violet Violett Violeta Violetto Paars Violet Violett Fiolett
ye Yellow Gelb Jaune Giallo Geel Gul Gul Gul
og Orange Orange Orange Arancione Oranje Orange Orange Oransje
bu Blue Blau Bleu Blu Blauw Blå Blå Blå
,, ,
+-+-
2
43
1
C1
5
rd
D+
+B1
+B2
D+
rdbk
bk
bu
og
ye
vt
5 A
86
87
87a
85
30
i

4445103619 11
EN DE FR IT NL DA SV NO
rd Red Rot Rouge Rosso Rood Rød Röd Rød
bk Black Schwarz Noir Nero Zwart Sort Svart Svart
vt Violet Violett Violeta Violetto Paars Violet Violett Fiolett
ye Yellow Gelb Jaune Giallo Geel Gul Gul Gul
og Orange Orange Orange Arancione Oranje Orange Orange Oransje
bu Blue Blau Bleu Blu Blauw Blå Blå Blå
rd
D+
+B1
+B2
D+
,, ,
5 A
rdbk
vt
bk
bu
og
86
87
87a
85
30
ye
+-+-
2
43
1
C2
j

12 4445103619
EN DE FR IT NL DA SV NO
rd Red Rot Rouge Rosso Rood Rød Röd Rød
bk Black Schwarz Noir Nero Zwart Sort Svart Svart
rd
D+
8685
3837
,, ,
5 A 5 A
rdbk
G
+-+-
2
3
1
D
4
55
k

4445103619 13
299
275 74
l

14 4445103619
EN
Please read these instructions carefully and follow all instructions, guide-
lines, and warnings included in this product manual in order to ensure that
you install, use, and maintain the product properly at all times. These instruc-
tions MUST stay with this product.
By using the product, you hereby confirm that you have read all instructions,
guidelines, and warnings carefully and that you understand and agree to
abide by the terms and conditions as set forth herein. You agree to use this
product only for the intended purpose and application and in accordance
with the instructions, guidelines, and warnings as set forth in this product
manual as well as in accordance with all applicable laws and regulations. A
failure to read and follow the instructions and warnings set forth herein may
result in an injury to yourself and others, damage to your product or damage
to other property in the vicinity. This product manual, including the instruc-
tions, guidelines, and warnings, and related documentation, may be subject
to changes and updates. For up-to-date product information, please visit
documents.dometic.com.
Contents
Explanation of symbols . . . . . . . . . . . . . . . . . . . .14
Safety instructions . . . . . . . . . . . . . . . . . . . . . . . .14
Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . .17
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Technical description . . . . . . . . . . . . . . . . . . . . .18
Mounting the battery control booster . . . . . . . 22
Connecting the battery control booster. . . . . . 22
Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Cleaning and maintenance . . . . . . . . . . . . . . . . 30
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . .31
Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Explanation of symbols
D
!
!
A
I
Safety instructions
Also observe the safety instructions and stip-
ulations issued by the vehicle manufacturer
and authorized workshops.
General safety
!WARNING! Failure to obey these
warnings could result in death or
serious injury.
Electrocution hazard
• Installation and removal of the battery charger
may only be carried out by qualified personnel.
• Do not operate the device if it is visibly dam-
aged.
• If this device's power cable is damaged, the
power cable must be replaced by the manufac-
turer, a service agent or a similarly qualified
person in order to prevent safety hazards.
• This device may only be repaired by qualified
personnel. Improper repairs can lead to consid-
erable hazards.
• If you disassemble the device:
– Detach all connections.
– Ensure that no voltage is present on any of the
inputs and outputs.
• Do not use the device in wet conditions or sub-
merge in any liquid. Store in a dry place.
• Only use accessories that are recommended by
the manufacturer.
• Do not modify or adapt any of the components
in any way.
DANGER!
Safety instruction: Indicates a hazard-
ous situation that, if not avoided, will
result in death or serious injury.
WARNING!
Safety instruction: Indicates a hazard-
ous situation that, if not avoided, could
result in death or serious injury.
CAUTION!
Safety instruction: Indicates a hazard-
ous situation that, if not avoided, could
result in minor or moderate injury.
NOTICE!
Indicates a situation that, if not avoided,
can result in property damage.
NOTE
Supplementaryinformation foroperating
the product.

4445103619 15
• Disconnect the device from the power supply:
– Before each cleaning and maintenance
– After every use
– Before changing a fuse
– Before carrying out electrical welding work or
work on the electrical system
Health hazard
• This device can be used by children aged from
8 years and above and persons with reduced
physical, sensory or mental capabilities or lack of
experience and knowledge if they have been
given supervision or instruction concerning use
of the device in a safe way and understand the
hazards involved.
•Electrical devices are not toys.
Always keep and use the device out of the reach
of very young children.
• Children must be supervised to ensure that they
do not play with the device.
• Cleaning and user maintenance shall not be
made by children without supervision.
ANOTICE! Damage hazard
• Before start-up, check that the voltage specifica-
tion on the data plate is the same as that of the
power supply.
• Ensure that other objects cannot cause a short
circuit at the contacts of the device.
• Ensure that the negative and positive poles
never come into contact.
Installing the device safely
DDANGER! Failure to obey these warn-
ings will result in death or serious
injury.
Explosion hazard
• Never mount the device in areas where there is a
risk of gas or dust explosion.
!CAUTION! Failure to obey these cau-
tions could result in minor or moder-
ate injury.
Risk of injury
• Ensure that the device is standing firmly.
The device must be set up and fastened in such
a way that it cannot tip over or fall down.
• When positioning the device, ensure that all
cables are suitably secured to avoid any form of
trip hazard.
ANOTICE! Damage hazard
• Do not place the battery charger near heat
sources (heaters, direct sunlight, gas ovens,
etc.).
• Set up the device in a dry location where it is pro-
tected against splashing water.
Safety when connecting the device
electrically
DDANGER! Failure to obey these warn-
ings will result in death or serious
injury.
Electrocution hazard
•For installation on boats:
If electrical devices are incorrectly installed on
boats, corrosion damage might occur. Have the
device installed by a specialist (marine electri-
cian).
• If you are working on electrical systems, ensure
that there is somebody close at hand who can
help you in emergencies.
!WARNING! Failure to obey these
warnings could result in death or
serious injury.
Electrocution hazard
• Observe the recommended cable cross-sec-
tions.
• Lay the cables so that they cannot be damaged
by the doors or the hood.
Crushed cables can lead to serious injury.
ANOTICE! Damage hazard
• Use ductwork or cable ducts if it is necessary to
lay cables through metal panels or other panels
with sharp edges.
• Do not lay the 230 V mains cable and the 12 V
DC cable in the same duct.
• Do not lay the cable so that it is loose or heavily
kinked.
• Fasten the cables securely.
• Do not pull on the cables.

16 4445103619
Operating the device safely
DDANGER! Failure to obey these warn-
ings will result in death or serious
injury.
Electrocution hazard
• Do not touch exposed cables with your bare
hands. This applies especially when operating
the device from the AC mains.
• To be able to disconnect the device quickly from
the AC power supply, the socket must be close
to the device and be easily accessible.
!WARNING! Failure to obey these
warnings could result in death or
serious injury.
Explosion hazard
• Only use the device in closed, well-ventilated
rooms.
!CAUTION! Failure to obey these cau-
tions could result in minor or moder-
ate injury.
Explosion hazard
•Donot operate the device under the following
conditions:
– In salty, wet or damp environments
– In the vicinity of corrosive fumes
– In the vicinity of combustible materials
– In areas where there is a danger of explosions
Electrocution hazard
• Before starting the device, ensure that the
power supply line and the plug are dry and the
plug is free from rust or dirt.
• Always disconnect the power supply when
working on the device.
• Observe that parts of the device may still con-
duct voltage even if the fuse has blown.
• Do notdisconnectany cables whenthedevice is
still in use.
ANOTICE! Damage hazard
• Ensure that the air inlets and outlets of the device
are not covered.
• Ensure a good ventilation.
• Never pull the plug out of the socket by the con-
nection cable.
• The device shall not to be exposed to rain.
Safety precautions when handling
batteries
!WARNING! Failure to obey these
warnings could result in death or
serious injury.
Risk of injury
• Batteries contain aggressive and caustic acids.
Avoid battery fluid coming into contact with
your body. If your skin does come into contact
with battery fluid, wash that part of your body
thoroughly with water.
If you sustain any injuries from acids, contact a
doctor immediately.
!CAUTION! Failure to obey these cau-
tions could result in minor or moder-
ate injury.
Risk of injury
• When working on batteries, do not wear any
metal objects such as watches or rings.
Lead acid batteries can cause short circuits
which can cause serious injuries.
• Weargoggles andprotective clothingwhenyou
work on batteries. Do not touch your eyes when
you are working on batteries.
Explosion hazard
• Never attempt to charge a frozen or defective
battery.
Place the battery in a frost-free areaand wait until
the battery has acclimatised to the ambient tem-
perature. Then start the charging process.
• Do not smoke, use an open flame, or cause
sparking near the engine or a battery.
ANOTICE! Damage hazard
• Only use rechargeable batteries.
• Prevent any metal parts from falling on the bat-
tery. This can cause sparks or short-circuit the
battery and other electrical parts.
• Ensure that the polarity is correct when connect-
ing the battery.
• Follow the instructions of the battery manufac-
turerandthose ofthe manufacturerofthe system
or vehicle in which the battery is used.
• If you need to remove the battery, first discon-
nect the ground connection. Disconnect all con-
nections and all consumers from the battery
before removing it.

4445103619 17
• Only store fully charged batteries.Recharge
stored batteries regularly.
• Immediately recharge deeply discharged lead
batteries to avoid sulfation.
• Check the acid level for open lead-acid batteries
regularly.
Safety precautions when handling
lithium batteries
!CAUTION! Failure to obey these cau-
tions could result in minor or moder-
ate injury.
Risk of injury
• Only use batteries with integrated battery man-
agement system and cell balancing.
ANOTICE! Damage hazard
• Only install the battery in environments with an
ambient temperature of at least 0 °C.
• Avoid deep discharge of the batteries.
Scope of delivery
Accessories
Available as accessories (not included in the scope
of delivery):
Intended use
The battery charger (also referred to as battery con-
trol booster) is intended to charge 12 V house bat-
teries in vehicles while driving and on themains. In
addition, the device can be used as a stable power
supply for consumers to keep the batteries fully
charged. When no charging source is available,
the pulsing operation ensures reconditioning of
lead-acid batteries.
The battery control booster is intended to be used
to charge the following battery types:
• Lead acid batteries
• Lead gel batteries
• Absorbed glass mat (AGM) batteries
• LiFePO4 batteries
The battery control booster is not intended to be
used to charge other types of batteries (eg. NiCd,
NiMH, etc.).
The battery control booster is suitable for:
• Installation in recreational vehicles (RV) and
motor homes
• Stationary or mobile use
• Indoor use
Quantity Description
1 MT BCB30/30 or MT BCB40/40 or
MT BCB60/40
1 Temperature sensor with cable (3 m)
1 Extension cable (5 m) with adapter for
display panel used for remote control
1 Installation and Operating manual
Designation Ref. no.
Load relay (EBL) with installation
cable set and terminal block for
charging cable with 2ringterminals
(for installation variant C1)
9620000273
(MT93080)
Bypass relay with installation cable
set (for installation variant C2)
9620001495
(MT93050)
Load relay (12 V, 100 A/ 180 A) with
M5 screw terminals (for installation
variant D)
9620000184
(MT02156)
D+ active simulator 9620000336
(MT02159)
Charging cable set (2 m) with fuse
(250 A)
9620001496
(MT 22002)
Charging cable set (3 m) with fuse
(250 A)
9620001497
(MT 22003)
Charging cable set (4 m) with fuse
(250 A)
9620001498
(MT 22004)
Charging cable set (5 m) with fuse
(250 A)
9620001499
(MT 22005)
Charging cable set (6 m) with fuse
(250 A)
9620001500
(MT 22006)
Designation Ref. no.

18 4445103619
The battery control booster is not suitable for:
• Outdoor use
This product is only suitable for the intended pur-
pose and application in accordance with these
instructions.
This manual provides information that is necessary
for proper installation and/or operation of the
product. Poor installation and/or improper operat-
ing or maintenance will result in unsatisfactory per-
formance and a possible failure.
The manufacturer accepts no liability for any injury
or damage to the product resulting from:
• Incorrect assembly or connection, including
excess voltage
• Incorrect maintenance or use of spare parts
other than original spare parts provided by the
manufacturer
• Alterations to the product without express per-
mission from the manufacturer
• Use for purposes other than those described in
this manual
Dometic reserves the right to change product
appearance and product specifications.
Techn ical d e scrip tion
General description
MT BCB30/30: The device charges with 30 A at
the 230 V mains and 30 A while driving.
MT BCB40/40: The device charges with 40 A at
the 230 V mains and 40 A while driving.
MT BCB60/40: The device charges with 40 A at
the 230 V mains and 60 A while driving.
If neither of these charging sources is available, the
integrated pulser takes care of battery mainte-
nance.
The battery control booster has 3 operating
modes:
• Mains operation: Charging of the house battery,
trickle charging of the starting battery and sup-
ply of 12 V appliances from the 230 V mains.
• Booster operation: Charging of the house bat-
tery by the alternator while driving.
• Pulser operation: The pulser can be activated
when no charging source is available to protect
the battery from sulfation.
The battery control booster offers the following
functions:
• Microprocessor-controlled, temperature-com-
pensated IU0U charging programs for various
battery types
• Auxiliary charging output for the starting battery
• Buffer operation: Compliance with the charging
characteristics even when the battery is charged
with consumers connected
• On-board mains suppression filter: Ensures par-
allel operation of the battery control booster
with other charging sources, for example mains
supply chargers or generators
• Automatic compensation of voltage loss caused
by the charging cable length (house battery)
The battery control booster has the following pro-
tective mechanisms:
• High voltage shutdown
• Low voltage shutdown
• High temperature shutdown
• Low temperature protection (only LiFePO4 bat-
teries)
• Protection against short circuit
• Reverse polarity protection (only for house bat-
tery connection)
The battery control booster can be adapted to dif-
ferent battery types via DIP switches (see chapter
“Setting the charging program” on page 26).
The temperature sensor monitors the battery tem-
perature during the charging process (see chapter
“Temperature sensor” on page 21).
The battery control booster is equipped with a
removable display panel for remote control.

4445103619 19
Description of the device
Connections and controls
Display panel
Item in
fig. 1,
page 3
Designation
1 Connection cable
2 Display panel
3 Rubber feet
4 Service connection
5 Connections and controls
6 Temperature sensor
7 Extension cable (5 m) with adapter for dis-
play panel used for remote control
Item in
fig. 2,
page 3
Designation Description
1Service
connection
For authorized personal
only
2DIPswitches
battery type
Setting of the charging
program (see chapter
“Setting the charging pro-
gram” on page 26).
3DIPswitches
battery
capacity and
functional
settings
Setting of the charging
current (see chapter
“Adapting the charging
current” on page 27) and
other functions.
4 Ntz terminal Output for 12 V signal
when connected to mains
(max. 100 mA)
5 BMS terminal Only for LiFePO4 batter-
ies: Input for control signal
of external battery man-
agement system
6 D+ terminal Input for D+ signal of the
alternator or ignition lock
signal (terminal 15)
7 CI terminal Optional
Connection for a caravan
industry bus system
Note: The battery control
booster must be inte-
grated into the CI-BUS on-
board management sys-
tem by the vehicle manu-
facturer, expansion
partner or a system inte-
grator.
8 TR terminal Output for controlling a
normally open relay NO
(connection variant D) or a
normally closed relay NC
(connection variant C1)
9 S–/S+ terminal Inputs for sense cables to
measure and control the
charging voltage at the
battery
10 T T terminal 2 connections for tem-
perature sensor
11 BORD+ Connection to positive
pole of 12 V house battery
12 COM– Connection to the nega-
tive pole of the house bat-
tery/chassis
13 START+ Connection to positive
pole of 12 V starting bat-
tery
Item in
fig. 3,
page 4
Designation
1 On/Off button
2LEDindicator
Item in
fig. 2,
page 3
Designation Description

20 4445103619
LED indicator on display panel
Battery charging function
A main charging cycle of the house battery is initi-
ated in the following situations:
• After a standstill of the alternator or mains failure
• After falling below the reset voltage of 12.75 V
for lead batteries or 13.10 V for LiFePO4 batter-
ies for 30 s
I
The charging characteristics for fully automated
continuous operation without monitoring are
referred to as modified IU0U characteristics (see
charging curve in fig. 6, page 5).
1: Analysis phase
The battery is deeply discharged (> 10 %). The
battery charge is analyzed with increasing
charging current.
LED Status Description
Current
(red)
On Charging current present;
mains or booster charging
mode
Off Charging current < 0.2 A
Batt. I
(yellow)
On House battery is charged in
mains or booster charging
mode
Flashing
slowly
• High temperature pro-
tection
• Only LiFePO4 batteries:
Low temperature pro-
tection
Flashing
quickly
Only LiFePO4 batteries:
Temperature < 0 °C,
reduced charging current
causing longer charging
times
Off No charging
Battery full
(green)
On House battery fully
charged (100 %);
U2/U3 phase
Flashing Charging process in
U1 phase (lead batteries:
< 75 %, LiFePO4 batteries:
<90%)
Flashing
slowly
State of charge 75 – 100 %
(lead batteries: > 75 %,
LiFePO4 batteries: > 90 %)
Main
Charging
(yellow)
On Charging process in
I/U1 phase
Flashing • Over voltage protection
• Temperature sensor is
not connected (only
LiFePO4 batteries)
Batt. II
(yellow)
On Booster charging mode;
starting battery charges the
house battery
Off Booster charging not acti-
vated
Flashing Starting batteryvoltage too
low
Power
(green)
On Voltage present; mains or
booster charging mode
Flashing
slowly
• Safety shutdown (chap-
ter “Troubleshooting”
on page 31)
• Over temperature pro-
tection
Flashing in
2sinterval
• AC power limit function
activated
•Nightmodeactivated
Flashing in
20 s interval
Pulsing operation mode
NOTE
In all charging phases (U1 phase to
U3 phase), almost the entire possible
charger current is available for the addi-
tional supply of DC loads without dis-
charging the battery.
LED Status Description