Sterling Power Products Dai 3000c 24xx User Manual

STERLING  
POWER PRODUCTS  
3 in 1 COMBINED  
PURE SINE WAVE INVERTER  
UPS / BATTERY CHARGER  
(SOLAR & SHORE)  
USER MANUAL  
England Tel. 01905 453999  
Fax 01905 458836  
General  
“ 3 in 1” It is a powerful pure sine wave inverter, a sophisticated battery  
charger that features adaptive charge technology and a high-speed AC  
transfer switch in a single compact enclosure.  
Besides all this functions ,however, the “3 in 1” has several advanced  
features that provides a range of new applications as outlined bellow  
In the event of a grid failure ,or shore or generator power being  
disconnected, the inverter within the “3 in 1” is automatically In less than 20  
milliseconds activated and takes over supply to the connected loads.  
Allowed them to continue to operate without disruption. The “3 in 1” is very  
powerful battery charger. It will therefore draw a lot of current from the  
generator or shore side supply.  
INVERTER:  
Pure Sine Wave AC output.  
Very low total harmonic distortion (< 2 % )  
High surge capacity and soft-start design for heavy inductive loads such as air  
conditioning  
Load detection system for “power saving” mode  
Extremely high efficiency.  
Battery Charger :  
The “3 in 1” series is built around a bi-directional converter , that operates as  
an inverter or as a battery charger high capacity three-stage Battery charger  
Equalization mode conditions Battery for longer life  
Multistage charger-power factor corrected for superior  
Charging temperature sensitive charging for optional  
Care of all batteries ( temperature sensor optional ) Built in solar charge  
regulator.  
Bypass Function:  
Automatic 60 A (3000W ) / 30 A ( 1500W ) transfer relay turns inverter and  
charger on / off.  
Fast ( UPS ) mode or delay mode of the Bypass switch.  
Power sharing prevent tripping of shore power breaker.  
Basic Remote Control:  
Power output on / off  
Function mode select  
Programming Battery charging voltage  
Error message display  
Programming auxiliary relay (x2 )  
Programming input current limit for power share  
-1-  
A. General Information  
Operating instructions  
This manual is a part of the delivery package of every inverter-charger. It serves as  
Guidelines for safe and efficient operation of the unit. The instructions are only  
valid for use with the following models and accessories.  
DAI-1500C-12xx / DAI-3000C-12xx  
DAI-1500C-24xx / DAI-1500C-24xx  
BTS-A-15 (m)  
Temperature  
Remote controller  
RCC-A-03 (3m) / RCC-A-15 (15m)  
Any personnel who install the unit and / or works with it must be fully familiar with  
the contents of this manual and must follow exactly all the warnings and safety  
instructions. A qualified and trained personnel must carry out installation of , or any  
work on the unit . Installation and application must comply with the respective local  
installations codes and safety regulations.  
-2-  
B. Warranty  
During production and assembling, all Sterling Inverter / Chargers go through  
many testing procedures. Every Sterling has its own serial number, which helps to  
refer back to its original data in the event of controls or repairs. That is why you  
should never remove the identification plate showing the serial number and must  
ensure you return your warranty card as soon as possible.  
The warranty period for your Sterling is 2 years.  
Sterling Warranty Terms and Conditions  
Sterling warrants this product against defects in material or workmanship, to the  
original purchaser only for an initial period of 60 days from date of purchase, when  
in normal use and service. The warranty period will be extended to a total of one (1)  
year if a completed warranty card is received within 60 days of purchase. No  
warranty will be provided on units which have not been paid for in full.  
Some models may have the option of purchasing an extended warranty period,  
see elsewhere in this manual for details. This manufacturers warranty is in addition  
to your consumer rights under local trade practices act.  
This warranty does not extend to products which have been opened, altered or  
repaired by persons other than authorized by Sterling or to products which  
become defective due to acts of God, fire, sabotage, vandalism, contaminated  
fluids, negligence or failure to operate, house and maintain the product in  
accordance with instructions provided in this manual. It is extremely important  
that all installation instructions contained within this manual are strictly  
adhered to , failure to do so will void your warranty. Except for the foregoing  
expressed warranty Sterling makes no warranty, expressed or implied,  
including but not limited to, the warranty of merchantability or fitness for a particular  
purpose.  
Sterling will repair or replace the defective product in accordance with its best  
judgment, For service under warranty, , if the product is found to be defective,  
within the terms of the warranty. Repair or replacement of any unit does not extend  
the original warranty terms in any way.  
This warranty does not cover repairs made necessary due to the product coming in  
contact with dirt, abrasives, moisture, rust, corrosion, varnish or other similar, or  
failure due to poor quality or poor condition batteries.  
-3-  
Sterling reserve the right with some models to supply an accredited installer with  
replacement parts, this may allow the unit to become operable much quicker. In  
this case Sterling are not responsible for any costs of the installer’s time or  
traveling expenses. Replacement parts are sent at Sterling's discretion.  
Sterling will in no way be held responsible for any losses incurred  
due to the malfunctioning or failure of a product.  
Suitably qualified personnel must carry out wiring, failure to do so will void  
warranty.  
If you have any questions about this warranty please do not hesitate  
to contact us.  
Caution: Even when a unit has been completely disconnected, there can  
Still be deadly voltages present at the OUTPUT. To remove these voltages you  
must switch the unit ON with the ON/OFF switch. After one minute the  
electronics are discharged and any work can now be safely carried out.  
Caution: In normal use lead-acid and lead-gel batteries give out explosive gases.  
Never smoke or allow a spark or flame in the vicinity of batteries. The batteries  
must always be stored or placed in a well ventilated area, they should be placed in  
such a way that there is no danger of short circuiting through carelessness. Never  
charge frozen batteries.  
This unit is not to be used or sold for life support equipment or applications.  
B.1 Special Precautions  
While working on batteries there should always be a second person close to you or  
within your voice range, in case help is needed.  
Plenty of fresh water and soap must be ready at hand so that in case of acid  
coming in contact with skin, eyes and clothes, the areas in question can be  
thoroughly washed.  
If acid enters the eyes, you must thoroughly wash the eyes with cold running water  
for at least 15 minutes. It is recommended that you immediately consult a medical  
doctor.  
Baking powder neutralizes battery acid electrolyte. Always keep some at hand.  
Special care must be taken when working with metal tools near or on the batteries.  
With tools such as screwdrivers, spanners etc. short-circuits can result. Sparks  
produced by the short-circuit can cause an explosion.  
When working on batteries all personal metal items such as rings, necklaces and  
bracelets must be removed. Batteries are so powerful that short-circuit with these  
items can melt them and thus cause severe burns. Always follow the battery  
manufacturers instructions.  
Under certain conditions this unit or a connected generator can start  
automatically. While working on an electrical installation you must ensure that  
these appliances are disconnected before commencing any work.  
-4-  
C. Introduction  
C.1 Basic schematic  
This unit is a a sine wave inverter with integrated battery charger and AC Bypass  
switch with many additional functions.  
DC BUS  
AC BUS  
PV Array  
Solar Controller  
Bidirectional Inverter  
(Inverter / Charger)  
BATTERY  
Home / Boat / Motohome  
AC Load  
C.1.1 The Inverter  
The sinewave-inverter section of your Combi generates a sinewave AC voltage  
with an exceptionally precise voltage and stabilized frequency, In order to start  
large electric motors, the user has the possibility to employ a short-start-power  
which is 3-times the nominal power of the Combi  
The inverter is protected against overload and short-circuit. A power-stage with the  
latest MOS-FET power transistors, a toroidal transformer, and a fast regulating  
system make-up a robust and reliable inverter with very high efficiency. A load  
detection system serves to provide the smallest energy consumption and ensures a  
long life for the battery.  
C.1.2 The Bypass switch  
This unit can be connected to an AC input source. For example a stand-by motor  
generator or the AC grid, such as shore power or a caravan park. With the  
transfer system, on one side you have AC voltage which is used to run the load,  
on the other side the batteries are being charged. The distribution of energy  
between the AC loads and battery charger is automatic.  
-5-  
C.1.3 The Battery charger  
The built-in battery charger is capable of charging the batteries quickly and  
completely. A microprocessor controlled, 3 to 4 Step charging process ensures  
the optimum charging of the batteries. The desired charging current can be set.  
The battery charger can be used for lead-acid or gel batteries. Thanks to the  
floating charge ability of this unit, the batteries can remain continuously connected.  
C.1.4 The solar charge regulator (opetional)  
With the built-in solar regulator, the unit is a complete solar-power-center. In a  
solar installation this regulator ensures that the batteries are charged correctly.  
With the unit, batteries can be charged with a generator and with the solar  
modules at the same time. The charging of batteries with both energy sources is  
carried out fully automatically.  
C.1.5 Remote control  
As an option, a remote control can be connected to this unit. The  
remote control is supplied with a 3m long cable. This cable can be up to 15m long.  
(RS-485 interface) On the remote control output current and charging current are  
also shown.  
C.2 Battery connections  
Lead-acid batteries are normally available in blocks of 2V, 6V or 12V. In most  
cases, to generate the necessary operating voltage and the capacity of the  
batteries for the unit many batteries have to be connected together in parallel  
and or in series. Following three examples are shown:  
-6-  
C.2.1 Parallel Connection:  
C.2.2 Series Connection:  
-7-  
C.2.3 Parallel-Series Connection:  
-8-  
D. Installation  
D.1 Location  
The location of the Combi must be chosen by the following criteria:  
Protection from unauthorized handling.  
Dry dust free room, no condensation, no rodents.  
Never install directly over the battery and never in a cabinet together  
with the batteries.  
Keep ventilation holes free. The ventilation of the Combi is designed in such a  
way that it will work most efficiently when mounted vertically.  
In mobile installation it is important to keep vibrations to a minimum.  
D.2 Rear Panel  
Connections  
A Battery +/-  
Battery cables.  
B SOLAR +/-  
C AUX1 contact  
D AUX2 contact  
Connections for Solar modules.  
Connecting terminal for Auxiliary contact 1.  
Connecting terminal for Auxiliary contact 2.  
E BTS (Battery temp. sensor) Connecting terminal for Temperature sensor.  
F EXT AC IN  
G AC OUT  
Connecting terminal for AC input.  
Connecting terminal for AC output.  
-9-  
D.3 Cabling / wiring  
When making connections to the unit you must ensure that all connections  
are carried out in a clean and correct manner and under no circumstances that a  
cable is connected to a wrong terminal.  
Connecting the unit must be carried out in the following order.  
D.3.1 Connection to battery  
Prepare the batteries for connection. Prepare battery cables, if necessary press  
on cable tabs/shoes. Connect the red cable to the Battery positive fuse/circuit  
breaker and the black cable to battery Minus (-) Take care when connecting the  
second cable to the battery, as a spark is produced, this is caused for a short time  
due to high current flowing in the unit to charge the capacitors. This is another  
reason to install a battery fuse/circuit breaker. For this reason follow strictly the  
safety measures described in this manual.  
DO NOT INSERT THE BATTERY FUSE AT THIS STAGE.  
D.3.2 Connection to the AC OUTPUT.  
The AC output must be connected to the screw terminal AC OUTPUT. For this,  
use a 3-core cable with a conductor cross section of 2,5mm². Connections are  
marked as follows “OUT / N”=Neutral, “GND”=Earth, “OUT / L”=Live or Active.  
Caution: High voltage can be at the AC output, ensure the unit is not  
connected when making AC connections.  
D.3.3 Connection to the AC INPUT  
The AC input supply from the electricity grid or from a generator must be  
connected to the screw terminals AC INPUT. For this use a 3-core cable with a  
conductor cross section of 2,5mm². Connections are marked as follows  
“IN / N”=Neutral, “GND”=Earth, “IN / L”=Live or Active.  
-10-  
D.3.4 Connect the Solar modules: SOLAR IN +/-  
Solar modules are connected on these terminals. Under no circumstances should  
any other energy source i.e. wind generator be connected to these terminals.  
Depending on the power of the modules, the cable cross section should be 2.5 up  
to 6mm². Before connecting it is necessary to check with a Voltmeter that the  
voltage of the Module meets the following values:  
Invertek DAI -1500C -12xx / DAI - 3000C -12xx 17-25V / 30A  
Invertek DAI -1500C -24xx / DAI - 3000C - 24xx 34-45V / 30A.  
D.3.5 Connection to Aux1 & AUX2:  
On these three terminals is a potential free change-over contact capable of  
switching a maximum current and voltage of 16A/250V ac. The “ multi-display “  
on the front of Combi can show the status of these contacts.  
D.3.6 Connection to Remote control unit ( optional ):  
The Remote control unit RCC-A is connected in the “Remote control” of front  
panel with a RJ11 / 6 connector. The Remote Control can be plugged IN at any  
time. Push in the connector, without forcing it, until you hear the ”click:, now the  
connector is locked in place. The same applies to the plug at the Remote control  
unit. The length of the cable for the Remote control should not exceed 15m, is  
comes standard with 3m cable.  
-11-  
E. Operating  
E.1 Front Panel Display And Operating Description  
Sterling Power Products  
2
1
3
4
8
10  
12  
6
5
7
9
11  
PB1  
PB2  
PB3  
PB4  
PB5 PB7  
PB6  
E.2 Push buttons  
Push buttons  
PB1  
Name  
Description  
RUN/STOP key  
k Operation mode select key.  
RUN/STOP  
FUNC  
PB2  
PB3  
AUX  
Auxiliary contract (aux1, aux2) Manual / Active change. And Function  
programming key  
PB4  
PB5  
DSPL  
Multi-display select key  
UP(△ )  
Increment key.  
PB6  
PB7  
DOWN (▽ ) ▽ Decrement key.  
ENTER Data write key.  
-12-  
E.3 LED INDICATOR:  
LED  
1
Name  
AC IN  
L ED ON  
LED Blink  
LED OFF  
1. Input voltage normal, and  
position ”transfer  
Has input power, but  
voltage or frequency is not  
in the allowance range.  
No input power  
Voltage Level”  
(150VAC~240VAC)  
2. Input voltage frequency  
range in between(45~60Hz)  
Green : Battery charger is  
working.  
2
3
CHARGER  
Green Blink : Battery  
charger is standby.  
Orange Blink : Battery  
charger is disable.  
--------------  
SOLAR PANEL Solar module is delivering  
energy.  
1. Solar module  
aren’t connect  
or  
2. Day or Night /  
(cloudy day)  
Solar charger is  
disabled.  
-----------------------------  
------------------------------  
4
5
6
SOLAR  
CHARGER  
Solar charger is working.  
AC OUT  
There is voltage at the “AC OUT” No voltage at the “AC  
terminal.  
OUT” terminal.  
-------------  
INVERTER  
Green : Inverter is working.  
Green Blink : Inverter is  
standby  
Orange Blink : Inverter is --------------  
disable.  
7
EQUALIZE  
In Equalize charging  
Process  
Disable Equalize  
charging function  
------------------------------  
8
9
BATTERY  
BYPASS  
Approx state of charge or discharge of Battery.  
Green : BYPASS switch is active Green Blink :BYPASS  
AC IN voltage is being sent  
directly to AC OUT terminal  
switch standby.  
Orange Blink : BYPASS ---------------  
switch disable  
10 RUN/STOP  
Green : Invertek turn on.  
Red : Invertek turn off.  
Red Blink : Auto-Restart  
is in use  
---------------  
-13-  
11  
MULTI-DISPLAY  
LED In Inverter Mode  
9.1 Battery Voltage  
9.2 Output Voltage  
9.3 Output Frequency  
9.4 AC output current  
In Charger Mode  
Battery Voltage  
Input Voltage  
Charging Phase  
Battery charging current  
LED 9.1  
LED 9.4  
LED 9.5  
LED 9.6  
LED 9.2  
LED 9.3  
Display  
monitoring  
values or set  
values of each  
parameter.  
9.5 Indicator of parameter setting or modify or monitor.  
9.6 Indicator of error message  
Battery under voltage trip.  
Battery over voltage trip.  
AC out overload trip.  
Heatersink overtemperature trip.  
12  
POWER  
MONITOR  
Displays the value of the output power in % of max continuous  
power (in Inverter Mode) and the charge current in Amps. (in  
Charger Mode) In this mode the 200% LED indicate that power  
sharing is in use.  
System Adjustments  
To adjust any of the unit’s preset parameters (factory/default settings are highlighted in dark blue in each function box) the unit must be in STOP mode! Select the  
function you wish to change from the list of light blue boxes below. Select the parameter in the box you wish to change. For example, if you wish to switch the power saver  
function off, you find that the power saver function is attached to Fn02 (function 2) and that selection 2 means “off”. To select this desired option go to the main key pad on the  
front of the unit. Push the pad marked FUNC (function) for 2 seconds and use up/down keys to scroll through the functions. (The display will show Fn00 up to Fn09.) Stop at  
the function you require. (For power saver stop at Fn02.) With Fn02 on the screen push ENT (”enter”) on the keypad and use the up/down arrows to select the parameter  
required. The display will show from 00 to 06 (depending on which parameter you wish to change). Then select the parameter number you wish (in this case the power saver  
off function which is 2), by using the up/down keys and push the ENT key to enter that selection. After the selection has been made the display will show End and this will  
complete the parameter change. Then press DSPL to return to the function heading (one level upwards). Either continue to adjusting the next function or press DSPL again to  
return to the voltage display mode. The unit will also automatically return to the voltage display after about 20 seconds if left alone. Don’t forget to return to RUN mode!  
Fn00  
Fn01  
Fn02  
Fn03  
Fn04  
Fn05  
Fn06  
Fn07  
Fn08  
Fno9  
Battery type  
0= Open lead acid  
1= Gel ( exide ) setting  
2= Gel u.s.a setting  
3= Agm sealed  
low voltage cut out  
0) 10.0 v  
1) 10.5 v  
2) 11.0 v  
3) 11.5 v  
4) 12.0 v  
DSPL FUNC  
AUX  
ENT  
inverter voltage  
0) 200 v 50 hz  
1) 220 v 50 hz  
2) 230 v 50 hz  
3) 240 v 50 hz  
solor charger  
1) on  
2) off  
screen example Fn09  
charging current reduction  
0) 25% reduction  
1) 50% reduction  
2) 75% reduction  
3) full current  
power saver mode  
1) power saver on  
2) power saver off  
system fuctions  
0) all functions normal  
1) inverter off, charger and bypass on  
2)charger and bypass off, inverter on  
3) inverter and charger off, bypass on  
input current limit setup  
0) 25 % power 4 amps  
1) 50% power 7 amps  
2) 75% power 11 amps  
3) 100% power 15 amps  
aux 1 setup  
aux 2 setup  
0) on when charger on  
1) on when charger off  
2) on when inverter on  
3) on when inverter off  
0) on when charger on  
1) on when charger off  
2) on when inverter on  
3) on when inverter off  
-15-  
E.7.1 The Inverter  
The Inverter section of the unit produces a high quality Sinewave output, the  
quality of this output is compatible with any appliance, Thanks to the generous  
dimensioning of the unit , you can operate appliances requiring higher power  
than the nominal power of the unit for a short time. The unit provide up to  
3-times the nominal power to start motors etc.  
E.7.2 Power saving function (Fn02)  
In order to avoid unnecessary discharge of the battery, the inverter switches OFF  
automatically if no AC power is being used. The unit switches ON  
automatically again if an AC load is switched ON. The AC Out LED blinks if the  
inverter is in “Power Saving-Mode”.  
If the “Power Saving-Mode” is not wanted, set the Fn02 "DISABLE" function.  
This will keep the unit running continuously, but will also discharge your  
batteries quicker.  
E.7.3 Overload  
If the unit is overloaded for too long or too heavily, it switches off. The  
“Multi-display” will show “  
” and the “RUN/STOP” LED will RED Blink. After  
approximately 10 seconds the Inverter switches on automatically. If the unit is  
overloaded four times in quick succession, then it no longer switches back on  
automatically. The “RUN/STOP” LED remains lit, and the multi-display show “  
Press the push button 1(PB1) ”RUN/STOP” in order to switch the unit back ON.  
”.  
E.7.4 Overheating (Over Temp)  
If the Inverter has been overload for a long time or it has been working in a high  
ambient temperature, it will switch OFF. The “Multi-display” will show “  
” and  
the “RUN/STOP”LED RED blinks. After cooling down, the inverter switches back on  
automatically. One minute before the inverter switches off due to high temperature  
a buzzer will be heard. If the Auxiliary Contact has been programmed for “Over  
Temp” then the contact will be active when the buzzer sounds. This could be used  
for example to start an emergency back up generator, creating a no break energy  
supply.  
-16-  
E.7.5 Battery Condition  
Deep discharging of batteries leads to high losses in capacity and early aging.  
That is why the unit will constantly monitor the battery condition. When battery  
voltage gets too low the Invertek switches OFF. The multi-display will show  
” or ”  
” (Low voltage cut out P-12) the “RUN/STOP” LED RED blinks.  
When the battery voltage returns to 12.1V resp..24.2V, the inverter switches ON  
automatically. One minute before the Inverter switches OFF due to low voltage a  
buzzer will be heard.  
The low voltage is set to 11.8V resp. 23.6V. These settings are standard for  
most batteries. The voltage levels are maintained by the built-in  
Battery-Management-System of the Invertek which looks at the load and battery  
condition and adjusts to suit.  
This setting is comparable with the levels of 10.8V resp. 21.6V, which are given  
for most batteries on nominal load.  
Absorption Stage  
Equalization Charging  
-17-  
F. Disabling Functions (Fn05)  
Each different function, charger, inverter and transfer can be disabled. This is  
useful for specific applications which are required to disable some of these three  
functions. If you press the “FUNC” button for more than 2 seconds you can  
have access to the different possibilities shown in the following diagram,.  
In programming mode the display only shows the different types of program with  
the “Charger”, Transfer” and “Inverter” functions. To change the type of  
programming press the “or ” button until the LED corresponding to the  
desired function is lit, in to the table below, After 10 seconds or press “DSPL”  
button the Invertek will exit the programming mode and function with the new  
programming,. In normal user mode, the disabled functions are displayed by a  
orange blinking LED.  
-18-  
F.1 Diagram of the different mode  
Indicates an off LED  
Indicates a orange blinking LED  
Indicates a lit green LED  
All the functions are enabled. This is factory setting.  
The inverter ins disabled. Only the Bypass switch and charger will  
work normally.  
Charger and Bypass switch are disabled. The inverter will work  
continuously even if there is a correct AC voltage at the input.  
Inverter and charger are both disabled. Only the Bypass switch  
function is enabled in input and frequency is OK.  
-19-  
G. Charger Information  
G.1.1 Charging Cycle  
The fully automatic battery charger can be adjusted so that most major battery  
types can be charged to the maximum,  
As soon as the minimum AC voltage is available at the AC input (“AC IN” LED is  
lit),the Battery Charger is switched on automatically (“CHARGER” LED is lit). The  
battery is automatically charged to match the pre adjusted voltage levels and  
charge current. Thanks to the sophisticated and intelligent Floating Charge  
System, the batteries can be left in charge mode for unlimited time.  
During the charging cycle, the AC loads are continually supplied with power from  
the incoming AC voltage source. (“AC OUT” LED is lit).  
G.1.3 Input current repartition (Power sharing Fn06)  
To manage the power available on the AC INPUT the unit is equipped with a  
system usually called “Power sharing” or INPUT power distribution. With this  
feature it is possible to limit the AC INPUT current assigned to the charger. The  
more current used by the AC load, the less power is given to the charger. Priority  
for the AC Loads. When power sharing is used the red 200% LED on the power  
monitor is lit to show that the battery charging is being limited.  
G.1.4 Set the charging current (Fn07):  
The maximum charging current or the battery can be adjusted by function Fn07.  
The charging current should be set to approximately 10-15% of the battery  
capacity (at C10). This means that the charging current for a battery with 300Ah  
should be set between 30-45A. The charging current is displayed on the  
“multi-display” or “CURRENT MONITOR” on the front panel  
G.1.5 Battery Condition:  
The built in microprocessor features a specially developed algorithm (formulae)  
which calculates the actual state of charge (SOC) of the battery and displays it on  
LED-8. The Equalize LED-7 is lit when the system is performing an equalization  
charge. The SOC displayed should be used as a guide only, for batteries which  
are not sealed, use a hydrometer to determine the exact SOC.  
For safety reasons:  
Make sure that the setting of the charger matches your battery type! The correct  
charging levels are critical for safe functioning and long life of the battery.  
-20-  
G.2 The Transfer system  
When an AC voltage is present at the AC IN of the unit , the “AC IN” LED is lit.  
When this voltage matches the Parameter P-06 value set, and the frequency is  
between 44Hz and 65Hz, then this power is transferred directly to the AC load and  
the battery charger section . The “TRANSFER” LED is lit to indicate  
this has happened. The inverter is then switched off and the battery charger  
switched on. This process is automatic and should not be noticed by the load, at  
worst a slight flicker may be seen in lights.  
The maximum current of the Bypass switch is 60A (CUxx3500) resp.  
30A (CUxx1700). That means through this system AC loads of up to a  
maximum of 7000 W (CUxx3500) or 3500W (CUxx1700) can be operated.  
When the Battery Charger is working, part of this power is used for the charging  
according to the power sharing settings.  
The Transfer system is protected against overload with an automatic breaker  
on the AC Input side of the unit . If the system has been overloaded  
the Input breaker will pop-out. To put the automatic safety system back in  
to operating you must push this breaker for reset.  
Note: In inverter operation the unit generates a pure sinewave and quartz  
stabilized output voltage. However, when the unit is transferring power from  
the grid or a generator the voltage and quality of the power running the AC load  
will be the same as that coming from the grid or generator. The unit cannot  
modify the incoming AC supply.  
G.3 The solar charge regulator  
The unit has a built-in solar charge regulator. To charge the batteries  
solar modules can be connected to the terminal SOLAR IN +/-. The  
built-in regulator is a shunt regulator with a maximum input current of 30A for all  
series products. The operating voltage of solar modules to be connected must  
match the actual operating voltage of the unit and never exceed the max. rated  
value.  
Under no circumstances should any other charging sources such as a  
wind-generator be connected at the input of the solar charge regulator.  
The Solar Charge Regulator works automatically and is always in operation. As  
soon as the energy is delivered from the solar charge regulator, the “SOLAR  
CHARGE” LED is lit and the batteries are being charged, The solar charge  
regulator works even when the battery charger is functioning. The method of  
operation is a 3 or 4 step charging process, the same as the battery charger. The  
function is described in the section on battery charger. The programming and the  
adjustments are carried out in accordance with the section on battery charger.  
The programming and the adjustments are carried out in accordance with the  
same conditions. Check with your battery supplier which adjustments must be  
carried out for your battery.  
-21-  
I. Auxiliary Contacts  
In the unit there are two built-in programmable power relays (AUX1, AUX2). The  
potential-free change-over contact of this power relay is connected to the screw  
terminals (AUX1 NO-NC-COM, AUX2 NO-NC-COM)  
Maximum Contact load: -230Vac / 5Amp-30Vdc/7Amp  
In the factory we program this output to be active when one these situations are  
detected:  
Over temperature  
Overload  
Over or under voltage of batteries  
Unit is turned off manually or with a fault, “RUN/STOP” LED RED lit  
over / under voltage of batteries.  
AC output overload.  
over temperature.  
J. The Remote control unit  
As an option, a Remote control unit can be connected to the unit . All operating  
controls and displays are available on the Remote control unit, The Remote control  
is supplied with a 3m long cable. It can be lengthened to 15m The Remote control  
is suitable for surface mounting on the wall or on to a switch board. It is fixed with 2  
screws. The unit can also be programmed with the Remote control. The output  
currents and the charging currents are displayed on the Remote control.  
J.1 The Temperature sensor  
Charging voltages of lead-acid batteries can change depending on temperature.  
To correct the operating voltages according to the actual temperatures, a  
temperature sensor can be connected to the unit .  
The compensation through the sensor is -3mv//Cell.  
-22-  
L. Programming Aux Contacts (AUX1, AUX2)  
L.1.1 Principle  
The Auxiliary unit can be basically programmed for any operating situation of  
the unit which is indicated with a LED. The programming is possible for one or  
more operating situations. If the contact is programmed for many situations, it is  
activated as soon as the unit finds itself in any one of the programmed  
situations.  
L.1.2 Example  
L.1.2.1 Auxiliary contact as generator starter  
When in the programming of the Auxiliary Contact, the State of Charge (SOC)  
LED`s (LED 8) can be used as a condition, then you must take note of the  
following requirements.  
If you have to start an emergency back-up supply with a battery having a certain  
SOC, then two SOC levels must be programmed. The first (i.e. Battery 25% LED)  
for the starting or activating the Auxiliary Contact and the second (i.e. Battery  
100% LED ) for stopping or deactivating the Auxiliary Contact. By programming  
in this way the Auxiliary Contact starts with the lowest set condition and stops  
when it has reached the highest programmed condition through charging.  
L.1.2.2 Auxiliary Contact as Twilight Switch (With solar charger option)  
The Auxiliary Contact can also be used as a twilight switch , i.e. for  
automatically operating exterior lighting. Solar modules connected to the unit  
will measure the light intensity. If the unit is operating without solar modules  
and a twilight-switching function is desired, you can connect small solar cells with  
the nominal voltage of the unit to the SOLAR terminals for the purpose of  
measuring the light intensity. To function as a twilight-switch the Auxiliary Contact  
must be programmed so that the condition “SOLAR CHARGE” LED is active.  
Programming must be carried out in steps and in accordance with the description  
for the programming of the Auxiliary Contact.  
L.1.3.3 Manual operating of Auxiliary Contact:  
The Auxiliary Contact can be operated manually at any time by pressing the  
) to indicate that the  
Contact is manually operated. By pushing the “AUX CONTACT” button again ,the  
“AUX” button. The “Multi-display show  
(
(
). By pushing it a third time,  
Contact is deactivated. Multi-display show  
automatic functions are restored and Multi-display show  
(
).  
-23-  
M. Maintenance  
Periodic maintenance is important to avoid potential problems. Every six months  
disconnect all power in and out from the system. Thoroughly clean and check all  
battery connections within the battery bank and to the unit . Ensure all  
connections to the unit are tight. Ensure the vents at the top and bottom of the  
unit are clear of any debris, such as mud wasps, severe dust build ups etc.  
Other than this, you should enjoy years of trouble free operation form your  
unit.  
-24-  
N. Specifications  
MODEL  
DAI-1500C-12xx  
DAI-1500C-24xx  
DAI-3000C-12xx  
DAI-3000C-24xx  
1.  
Inverter Section  
Nominal battery voltage  
Input voltage range  
12V / 24V  
9.5-16V / 19-32V  
12V / 24V  
9.5-16V / 19-32V  
Output voltage  
200~240Vac / 100~120Vac  
Output frequency  
50Hz / 60Hz  
< 2%  
Total Harmonic Distortion output THD  
Dynamic behavior 0100%  
Nominal power (W)  
Maximum power 30 min (W)  
Maximum power 3 min (W)  
Maximum power 5 sec (W)  
Maximum load  
0.5 ms  
1500W  
1700W  
2300W  
3000W  
3000W  
3500W  
4500W  
6000W  
Up to short circuit  
Asymmetrical load max.  
Overload and short circuit protection  
Overheating temperature protection  
Power factor range  
Power saving function  
Maximum efficiency  
Up to nominal output power  
Automatic disconnection with 5 time restart attempt  
Acoustic warning before shut-off. Automatic restart  
0.1-1  
(disable / enable)  
85-90%  
2. Battery Charger Section  
Maximum input voltage  
Minimum input voltage  
265 Vac, 350 V peak  
Adjustable 150-230Vac  
45~63Hz  
Input Frequency range  
Charging current adjustable  
Setting of AC INPUT current POWER  
SHARING  
0-50A / 0-35A  
100A / 0-70A  
0 to 15A  
3. Solar Charge Regulator-Floating  
Maximum Poen Circuit Voltage  
Maximum charging current  
25V  
30A  
45V  
30A  
4. Battery Charge Montitoring (25)  
*Low battery disconnection voltage  
*Low voltage  
*End of charge cycle voltage  
*Equalization voltage every 25 cycles  
*Floating voltage  
10.8V / 21.6V  
10.8V~12.0V (11.6V) / 21.6V~24.0V (23.2V)  
14.2V~15.0V (14.4V) / 28.4V~30.0V (28.8V )  
15.1V~15.5V (15.3V) / 30.2V~31.8V (30.6V)  
13.3V~13.7V (13.5V) / 26.6V~27.4V (27.0V)  
0~4h (2h)  
*Absorption charge time  
Temperature compensation (Option)  
3mV / cell  
5. General date  
AC By pass time (UPS-Mode)  
Potential free Multifunction contact  
Max Current at Transfer relay  
Operating temperature  
20ms max  
5A-250Vac / 7A-60V dc x 2  
30A / AC 220V  
60A / AC220V  
-20to +55℃  
Fan forced ventilation  
From 45/ over 75will be trip  
Protection index IP  
Weight  
IP20  
15kg  
22kg  
Dimension H*W*L (mm)  
350x285x185  
510x285x185  
Remark* ( ) Factory settings  

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