SCHAUDT LRM 1218 Operating Instructions
Operating Instructions
LRM 1218 Solar Charge Regulator
Table of contents
1 Safety information 2......................................
1.1 Meaning of safety symbols 2...............................
1.2 General safety information 2...............................
2 Introduction 3............................................
2.1 Purpose 3...............................................
2.2 Function of the LRM 1218 solar charge regulator 3............
3 Operation 4..............................................
4 Operating faults 5........................................
5 Technical details 6........................................
5.1 Mechanical details 6......................................
5.2 Electrical details 6........................................
5.3 Environmental parameters 7...............................
6 Maintenance 7...........................................
Appendix 8..............................................
E Schaudt GmbH, Elektrotechnik und Apparatebau, Planckstraße 8, 88677 Markdorf, Germany, Tel. +49 7544 9577-0, Fax +49 7544 9577-29, www.schaudt--gmbh.de
822.213 BA / EN
Date: 21.04.2015
Operating Instructions for Solar Charge Regulator LRM 1218
1 Safety information
1.1 Meaning of the safety symbols
Y DANGER!
Failure to comply with this sign may result in danger to life or physical condition.
Y WARNING!
Failure to comply with this sign may result in injury.
Y ATTENTION!
Failure to comply with the sign may result in damage to equipment or other
connected loads.
1.2 General safety instructions
The design of the device is state-of-the-art and complies with approved safety regulations. Failure to observe the safety instructions may nonetheless
lead to injury or damage to the device.
Only use the device when it is in perfect technical condition.
Any faults affecting the safety of persons or the proper functioning of the device must be repaired immediately by specialists.
Y DANGER!
230V units carrying mains voltage.
Risk of fatal injury due to electric shock or fire:
F Do not carry out maintenance or repair work on the device
F If cables or the device housing are damaged, no longer use the
device and isolate it from the power supply
F Ensure that no liquids enter the device
Y WARNING!
Hot components!
Burns:
F Only change blown fuses when the device is fully de-energised.
F Blown fuses may only be replaced once the cause of the fault is
known and has been rectified.
F Never bypass or repair fuses.
F Only use original fuses rated as specified on the device.
F Device parts can become hot during operation. Do not touch them.
F Never store heat sensitive objects close to the device (e.g. tempera-
ture sensitive clothes if the device has been installed in a wardrobe).
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Date: 21.04.2015 822.213 BA / EN
Operating Instructions for Solar Charge Regulator LRM 1218
2 Introduction
This instruction manual contains important information on safe operation of
the device. Make sure you read and follow the safety instructions provided.
The instruction manual should always be kept in the vehicle. All safety information must be passed on to other users.
2.1 Purpose
The MPP LRM 1218 solar charge regulator is for charging the batteries of
the motorhome by means of the solar modules connected.
Electroblocks
Batteries
Solar current display
LT 320 (accessory)
The solar charge regulator limits and controls the charging voltage of the
batteries. The LRM 1218 solar charge regulator can be connected to:
F a Schaudt electroblock with an STDBUS connection and a separate
connection for solar current
F a Schaudt electroblock with a separate connection for solar current
F a Schaudt electroblock with a retrofit adapter for charging the starter
battery
F directly to the batteries
Y To use the solar charge regulator with an electroblock, refer to the in-
struction manual for the electroblock.
For vehicles with SDTBUS, or when a digital control panel with solar current
display is available, the charging current is read by the shunt fitted in the
solar charge regulator, and displayed on the panel as solar current.
When used on systems without an integrated solar current display, the
separately available LT 320 control panel can be used as an accessory. It
enables the display of the solar charging current for the leisure and starter
batteries.
Function ofsolar cell
Maximum Power Point
Functional principle
of the LRM 1218
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2.2 Function of the LRM 1218 solar charge regulator
The power output of a solar cell is dependent on its load and temperature,
as well as other factors such as lighting intensity. A certain off-load voltage is
applied to a non-loaded solar cell under light irradiation.
The maximum power can be taken in the Maximum Power Point (MPP) of a
MPP
solar module. Because the solar module only delivers its highest yield in this
point, a regulator connected must be able to find this point, and keep it continually even under changing conditions.
The LRM1218 solar regulator is used to charge 6-cell, 12V lead batteries
(lead-acid, lead-gel and AGM batteries).
The solar regulator is a clocked converter featuring a very high efficiency
level. A microcontroller controls it such that the solar modules connected
always operate within the point of maximum power (the MPP) independently
of sun exposure, battery voltage and module temperature, whilst the battery
is in the main charging phase.
The charge voltages provided are aligned perfectly to the leisure battery by
means of a temperature sensor and the ability to set three battery types.
Date: 21.04.2015
3
Operating Instructions for Solar Charge Regulator LRM 1218
B
The starter battery is also charged -- as soon as the leisure battery has finished the main charging phase.
The solar regulator has an SDTBUS connector and so can be integrated
perfectly into bus systems from Schaudt. For the upgrading of older systems
(such as the DT 201 and DT 220 control panels in conjunction with EBL 101
and EBL 220), a connector with an appropriate analogue signal to display
the solar currents in the leisure and starter batteries is provided.
Two LEDs for ”Operation” and ”Charge retention” provide information on
function and broadly full battery. The device has a very compact and lightweight design. The fan fitted is very quiet and runs only when the performance is high.
Its function means the MPP LRM 1218 solar regulator is able to deliver (depending on conditions such as outside temperature and level of sunshine) a
5 ... 30% higher solar current than conventional series regulators (a low outside temperature and high level of sunshine would be ideal).
Leisure battery
Starter battery
Three different charging curves (”Lead-acid”, ”Lead-Gel/AGM I” and ”AGM
II”), or supply with a fixed voltage, can be set from two slide switches.
The charge curve however is dependent not only on the setting of the battery type switch, but also on the battery temperature determined (when an
optionally available battery temperature sensor is connected or when the
LRM 1218 is connected to an SDTBUS system having a battery temperature
sensor).
The preference is to load the leisure battery. As soon as the LRM 1218 restricts the loading voltage of the leisure battery, it indicates the broad charging of the leisure battery. Charging of the starter battery is activated at this
moment.
3 Operation
The solar charge regulator has no controls.
The LRM 1218 solar regulator may have to be readjusted when the battery
type is changed:
Switch settings
attery type set
Switch S1 Switch S2
Supply mode 1 A
AGM2 1 B
Lead-gel / AGM1 2 A
Lead-acid 2 B
Y The charge regulator supplies a constant output voltage in supply mode.
Y The two switches are well recessed to stop them being used incorrectly.
A small screwdriver may have to be used to change the switches.
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Operating Instructions for Solar Charge Regulator LRM 1218
p
y
Green LED
Yellow LED
S2
S1
Fig. 1 Battery setting switches and LEDs
Two LEDs show the current status of the regulator:
F Yellow LED: Device in charge mode (leisure and/or starter battery)
F Green LED: Charge retention active (leisure battery full)
F The two LEDs flash alternately: Supply mode
The solar currents are displayed on a control panel connected (such as an
L T 320) -- refer to the separate operating instructions.
Retrofitting a TF ...
battery temperature
sensor
Proceed as follows if a battery temperature sensor is to be retrofitted:
" Switch off the system from the main switch (control panel)
" Remove the ”Solar modules” connector on the LRM 1218
" Remove the ”Leisure and starter battery” connectors on the LRM 1218
" Plug the battery temperature sensor into the LRM 1218
" Plug the ”Leisure and starter battery” connectors into the LRM 1218
F The LRM 1218 solar regulator reconfigures itself automatically -- chan-
ged battery charge curves are now used.
" Plug the ”Solar modules” connector into the LRM 1218
Y A battery temperature sensor connected directly to the solar regulator
has the benefit that charging is temperature-controlled even when the
bus is not active (such as when not in use in the winter break).
4Faults
Please contact our customer service team if you cannot rectify the fault
using the following table.
If this is not possible, such as when you are abroad, the solar regulator can
continue to be used. For faults E271 and E272 (display of only SDT ... bus
systems possible), standard curves are used for charging. Charging is then
no longer temperature-controller.
Fault Possible cause Remedy
No display of the solar cur- Defective wiring Have the wiring checked
rent on the control panel
(if available)
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Date: 21.04.2015
Solar charge regulator defective
Defective electroblock Contact customer service
Contact customer service
5
Operating Instructions for Solar Charge Regulator LRM 1218
g
Fault RemedyPossible cause
Batteries are not being Defective batteries Have the batteries checked
charged
Yellow LED flashing Output stage disabled (re-
SDT ... bus system
fault messages:
E270 No LRM 1218 on bus Check bus wiring
E271 Battery temperature sen-
E272 Battery temperature sen-
E273 Overload/overcurrent and/
*The temperature value available on the bus is used as an alternative for bus systems with another battery temperature sensor (such as a HELLA battery sensor).
If batteries are in perfect
working order: Solar
charge regulator defective
Defective electroblock Contact customer service
Defective wiring Have the wiring checked
gulator not being used)
due to overcurrent or overvoltage
sor short-circuit*
sor cable break or defective sensor*
or overtemperature
Contact customer service
Incorrect solar module (or
too many solar modules)
connected (input power
too high) -- contact customer service
Contact customer service
Check wiring/
connector
Contact customer service
Check wiring
Replace sensor
Incorrect solar module (or
too many solar modules)
connected (input power
too high) -- contact customer service
5.1 Mechanical details
Dimensions
Weight
Casing
5.2 Electrical details
Nominal voltage
Charging current
Suitable batteries
Suitable solar modules
5 Technical details
135x48x90(WxHxDinmm)
360 g
Plastic, blue (RAL 5010)
12 V DC
Up to 20 A for leisure and starter battery together;
leisure battery has priority;
e.g. only leisure battery for solar power 275 W:
F 20 A @ 13.2 V leisure battery voltage
F 18 A @ 14.4 V leisure battery voltage
6-cell lead batteries, 55 Ah and above (lead-acid, lead-gel, AGM)
F 36-cell modules as a minimum
F Off-load voltage 20 ... 32 V
F Maximum total capacity of solar modules 275 Wp
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Date: 21.04.2015 822.213 BA / EN
Operating Instructions for Solar Charge Regulator LRM 1218
Calculation example
End-of-charge-
voltages
Suitable EBL ...
electroblocks and other
connection options
For example, five solar modules each rated at 55 Wp can be connected in
parallel:
Per solar module e.g. U
Total nominal current I
Battery type
set
Chargingvoltage
Charge retention voltage
offload
I
MPP
MPP
=22V,U
=3.2A
=16A
= 17.2 V
MPP
At reference
temperature
Time
phase
Supply mode Fixed voltage 13.4 V
AGM2 14.7 V 13.7 V 25 C 4h
Lead-gel/
14.4 V 13.8 V 25 C 12 h
AGM1
Lead-acid 14.4 V 13.4 V 25 C 4h
The temperature correction of end-of-charge voltages is --20 mV per degree
of temperature increase (in relation to 25 C) or +20 mV per degree of temperature reduction (voltage limits: U
13.4 V ; U
min
14.9 V ; the top voltage
max
limit at 14.9 V is in consideration of the maximum input voltage of the consumers connected).
F Schaudt electroblocks with SDTBUS (they have a separate input for
the solar currents of leisure and starter batteries, and a connector for
the SDTBUS)
5.3 Environmental parameters
Operating temperature
Storage temperature
Humidity
CE
F Schaudt electroblocks with a separate connector for the solar currents
of leisure and starter batteries; possibly also a connection for current
display (relayed to the DT .../LT ... control panel connected to the EBL
...)
F Schaudt electroblocks with a retrofit adapter for charging the starter
battery
F Direct connection to leisure and starter batteries for external systems;
solar current display by LT 320 (available optionally) possible
-10 Cto+50C
-20 Cto+70C
Operation in dry environment only
CE marked
6 Maintenance
The device requires no maintenance.
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Cleaning
E
Clean the device with a soft, slightly damp cloth and mild detergent. Never
use spirit, thinners or similar substances. Do not allow liquids to enter the
device.
No part of this manual may be reproduced, translated or copied without express written permission.
Date: 21.04.2015
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Operating Instructions for Solar Charge Regulator LRM 1218
Appendix
A EC Declaration o f Con fo rmity
Schaudt GmbH hereby confirms that the design of the LRM 1218 solar charger regulator complies with the following relevant regulations:
The original CE declaration of conformity is available for reference at any
time.
Manufacturer
Address
B Special fittings/accessories
Panel
Battery temperature
sensor
C Fault report
Schaudt GmbH, Elektrotechnik & Apparatebau
Daimlerstraße 5
88677 Markdorf
Germany
LT 320 instrument panel for connection to systems without a direct solar current display by the control panel
TF 50 A battery sensor to read the battery temperature -- is read automatically and has a bearing on the charging characteristics
In the event of damage, please fill in the fault report and send it with the
faulty device to the manufacturer.
Device type: _______________________
Item no.: _______________________
Vehicle: Manufacturer: _______________________
Model: _______________________
Own installation? Yes
Upgrade? Yes - No -
- No -
Following fault has occurred (please tick):
- Battery is not charged when solar modules are connected
- Persistent fault
- Intermittent fault/loose contact
Other comments:
8
Date: 21.04.2015 822.213 BA / EN
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