Studer AJ SERIES, AJ 275-12, AJ 350-24, AJ 400-48, AJ 500-12 User's And Installer's Manual

SINE WAVE INVERTER

SINUS-WECHSELRICHTER

ONDULEUR SINUSOÏDAL

AJ SERIES

User’s and installer’s manual

Betriebs-und Montageanleitung

Manuel d’utilisation et de montage

STUDER INNOTEC AJ

AJ V2.1 2/24

English description................................................................................................... 3

Introduction ............................................................................................................... 3

Warning...................................................................................................................... 3

Installation................................................................................................................. 3

Connection ................................................................................................................ 4

Use.............................................................................................................................. 5

Model with stand-by system .................................................................................... 5

Safety ......................................................................................................................... 6

Maintenance .............................................................................................................. 7

Warranty limit............................................................................................................ 7

Limits of manufacturer liability................................................................................ 7

JT8 Remote control for AJ 1000-2400 ..................................................................... 7

Technical data ........................................................................................................... 8

Model with built-in solar charger (option – S) ........................................................ 9

Deutsche Beschreibung......................................................................................... 10

Einführung............................................................................................................... 10

Vorsicht.................................................................................................................... 10

Installation............................................................................................................... 10

Anschluss................................................................................................................ 11

Anwendungen ......................................................................................................... 12

Lasterkennungsschaltung „stand-by“ .................................................................. 12

Sicherheiten............................................................................................................. 13

Unterhalt .................................................................................................................. 14

Garantieausschluss................................................................................................ 14

Haftungsausschluss............................................................................................... 14

JT8 Fernsteuerung für AJ 1000-2400..................................................................... 15

Technische Daten.................................................................................................... 15

Solarladeregler für fotovoltaïsche Solarmodule (Option – S) ............................. 16

Instructions en français ......................................................................................... 17

Introduction ............................................................................................................. 17

Mise en garde .......................................................................................................... 17

Installation............................................................................................................... 17

Raccordement

......................................................................................................... 18

Utilisation................................................................................................................. 19

Modèles avec stand-by........................................................................................... 19

Sécurités.................................................................................................................. 20

Maintenance ............................................................................................................ 21

Exclusion de la garantie......................................................................................... 21

Exclusion de la responsabilité............................................................................... 21

J T8 Commande à distance pour AJ 1000-2400 ................................................... 22

Données techniques............................................................................................... 22

Modèles avec chargeur solaire (option – S) ......................................................... 23

STUDER INNOTEC AJ

AJ V2.1 3/24

English description

Introduction

The sine wave inverters of the AJ series
have been designed to meet industrial
and domestic needs. They meet the
highest requirements of comfort, safety
and reliability.
Any device designed for the public
electrical network of 230 V 50 Hz can be
connected to them (up to the nominal
power of the inverter).
The AJ series is the perfect source of
voltage in any place where the public
network is not available.
This document is an essential part of the
inverter and must always be carried with
it and be at the disposition of anyone
working on the installation.
Should you have any doubt or question,
do not hesitate to contact your specialist
salesperson who will give you the best
advice.

Warning

A deficient assembly could result in
damage to the device, cause function
failures or potential damage to the
users.
The working device generates a high
voltage which might be lethal in case of
contact. So, any manipulation of the
inverter must be carried out with utmost
care.

THE OWNER MUST NOT
MANIPULATE ANY PIECE INSIDE
THE INVERTER.

Opening the inverter or using it
incorrectly will result in the immediate
loss of the warranty.
No current or tension generating device
(public grid, generator,... ) may be
connected to the outlet of the inverter

because this could result in its
destruction.

The inverter AJ is to be used only with a
lead battery. As for the use of batteries,
follow the manufacturer’s instructions.

Installation

The AJ sine wave inverter is an
electronic device, for which some
caution must be taken when installing it:
Place where the inverter is to be
installed:
Out of reach of unauthorised persons,
specially children.
In a dry place (max. 95% humidity), and
in any case with no condensation.
Not directly on top of the batteries.
Ventilation must be free, and a space of
10 cm. on each side is needed for good
evacuation of the internal heat.

Fitting the inverter

The inverter is fitted by screws (max.
4mm for AJ 275-AJ 1300 or max. 8mm
for AJ 2100 and 2400) using the four
holes provided. The fitting screws are
not supplied with the inverter. It may be
fit into any position.

STUDER INNOTEC AJ

AJ V2.1 4/24

Connection

The connection of the inverter should be
done with utmost care. First connect the
consumer devices so as to prevent any
further contact once the 230 V voltage is
present. The technical data and
connection’s description, is either under
one side of the inverter or onto the cable
connection side. Installation is to be
made only by authorised persons.

Connecting the consumer devices

The AJ inverter is supplied with a 230 V
cable for the consumer devices. This
connection must be done observing the
colours:
Yellow-green: earth
Brown: phase
Blue: neutral
Once the consumer devices are
connected, make sure that they are
turned off before connecting the battery

Note

An Inverter constitutes an independent
power supply from the grid and could be
considered in the same way as a
generator set. The phase and the
neutral are not differentiated. The
voltage in between the phase and the

neutral is 230V. An appropriate divisor
establishes a 115V voltage in between
neutral and earth, and the phase and
earth. According to the local
prescriptions or particular requirement,
(example: use of a ground fault detector)
a true neutral may be established by
connecting the neutral and the earth
wire together. The so connected point,
may be connected with an existing
earth: earth of building; the chassis of
vehicle or the hull of ship.

Equivalent schema

Connecting the battery

Once the consumer devices are
connected, make sure that the
installations instructions of the 230V has
been followed with utmost care before
connecting the battery.

The cable of the battery is supplied with
the inverter and already connected in it.
A fuse must be installed on the battery.
Connect the battery observing carefully
the polarity. The AJ inverter, except AJ
2100-12, is protected against inversion by
a fuse, but if the polarity should be
inverted, the inverter must be sent to the
manufacturer for control.
Connect the battery using the following
colours:
BLACK cable: negative pole (-)

RED cable: positive pole (+)
For AJ 275-400, dominant colour is
applicable
When connecting the battery, there’s a
spark (Danger of explosion!),
because of the charging of the internal
condensator.

Check that the cables are well
adjusted and well tightened.

As long as it is possible, do not extend
the cables supplied with the batteries.
Extending them may increase the

STUDER INNOTEC AJ

AJ V2.1 5/24

losses and cause malfunction of the
inverter.
Once the inverter is connected to the
batteries, a 230 V voltage is present in
the outlet of the inverter.

Use

Control and indicators
Control switch on/off

There is a switch on the inverter to
activate or deactivate it. Use this function
to save the energy of the batteries when
you are not using the inverter.

Green indicator

A green light on the inverter indicates its
function mode:
Illuminated: a 230 V voltage is present in

the outlet, the inverter is on.

Blinking:

_ _ _ : No load (stand-by)
__ __ __ : the 230 V voltage has been
cut due to an alarm; the inverter will
resume function when the failure has
disappeared (see the failure table).

Off: the 230 V voltage is NOT present in

the outlet, the inverter is off.

Acoustic indicator

The AJ inverter has an acoustic indicator
for the following instances:

Intermittent beep: there is a failure in the

inverter and the outlet voltage will be
interrupted.
Possible failures:
Overheat: the acoustic indicator beeps 3

ºC before cutting the tension. If the
temperature reaches its normal level,
the voltage in the outlet is not
interrupted.

Low battery voltage: the indicator beeps

for a minute before the interruption. If
the voltage of the battery rises, the
outlet voltage is not interrupted.

Continuous beep for two seconds: you

have pressed the ON/OFF switch to
restart the inverter. The tension in the
outlet will be immediately present after
the acoustic signal.

Model with stand-by system

The inverters from the AJ 500-12 are
equipped with a stand-by system which
is in function when no load is
connected. In that situation the inverter
is in low power consumption mode.
The output tension is not continuously
present and the LED is blinking as long
as no load is detected.
The minimal load detected can be
adjusted between 1 and 20 W. In most

cases this adjustment is not
necessary. This adjustment is made

with a small screw driver in the hole
marked stand-by. This adjustment is
made with a small screw driver in the
hole marked stand-by. Adjusting the
switching-on level is as follows: Switch
off all consuming devices; turn the
Turning Knob to the Left (counter­clockwise)until the LED is blinking,
switch ON the smallest consuming
device (i.e. Mobile phone charger); turn
the Turning Knob slowly to the right
until LED is lit continuously. Check that
the inverter will go back in stand-by
mode when you remove the load. If
not, this means that the load is too
small to be detected.
If the stand-by is not required, turn the
Knob fully to the right.
In the full counter clockwise position,
the sensibility is minimal (20 W). Do
not push on the screw driver.
NOTE: in this mode the output voltage
is intermittently present at the output

STUDER INNOTEC AJ

AJ V2.1 6/24

Safety

The inverter is electronically protected. But protection against polarity inversions of the
battery occurs with an internal fuse, except for AJ 2100-12 inverter, which has no
fuse. The following table will show you the different failures and their consequences.

FAILURE CONSEQUENCE SOLUTION
Low battery voltage
Voltage < 1.8V/cell

Inverter momentarily
stopped, the green
indicator blinks.

Automatic restart when the
battery voltage rises

Deep discharged battery
(voltage <1,5V/cell)

Inverter stopped Inverter should be manually

restarted when the battery
as reach 2V/cell

Overheating Inverter momentarily

stopped, the green
indicator blinks.

Automatic restart when the
temperature reaches the
normal range.

Battery over voltage Inverter stopped. Wait until the battery voltage

reaches the correct level.
Push the ON/OFF switch to
reactivate the inverter

Short circuit in the outlet Inverter stopped. Eliminate the short circuit.

Push the ON/OFF switch to
reactivate the inverter.

Overload Inverter stopped. Use the inverter only in the

range of its nominal power.
Regular use in overload
power diminished the
lifetime of the inverter.
Push the ON/OFF switch to

reactivate the inverter.
Inversion of the battery
polarity

Internal fuse broken down Back to manufacturer for

testing

STUDER INNOTEC AJ

AJ V2.1 7/24

Maintenance

The inverters of the AJ series do not
need any special maintenance. The
casing may be cleaned with a damp
cloth (not wet).
In the case of malfunction, the inverter
should be sent back to the manufacturer
for control in its original packing.
Before sending the inverter, check the
table above.
The battery is loaded and is in
accordance to the inlet nominal tension
of the device.
The consumer devices do not have any
defects or overload for the inverter.
Should you contact your salesperson,
note the following points before calling:
(you will find this information on the label
underneath the inverter)

- Series number

- Power of the inverter

- Inlet nominal voltage of the inverter

Before sending back the inverter, do
take care that it is well packed. The
inverter must be in a stiff carton box
and be well protected on all sides by
mean of an anti-shock and isolating
layer of min. 5cm thickness.
The damages occurring during the
transport are not covered by the
warranty.

Warranty limit

The warranty period is 2 years.
It will be considered void if the unit has
suffered any physical damage or
alteration, either internally or externally,
and does not cover damage arising from
improper use like:

− Reverse of battery polarity

− Inadequate input voltage (over

voltage)

− Back-feed of the inverter output by
public network, generator or any other
source.

− Mechanical shock or deformation
specially by transport due to an
inadequate package.

− Contact with liquid or oxidation by
condensation

− Use in inappropriate environment
(dust, corrosive vapour, humidity, high
temperature,...)

This warranty will not apply where the
product has been misused, neglected,
improperly installed, or repaired by
anyone other than STUDER INNOTEC
or a company authorised by STUDER
INNOTEC. In order to qualify for the
warranty, the product must not be
disassembled or modified.

Limits of manufacturer liability

STUDER INNOTEC cannot control the
installation, use and maintenance of the
inverter. Thus, we are not responsible
for damages, costs or losses resulting
from an installation which is not in
accordance with the regulations or
inappropriate use or maintenance.
The customer is always responsible for
the use of the inverters STUDER
INNOTEC.
This device has not been designed and
is not warranted for use in life support
apparatus or any other critical device
with potential risks of important harm to
people or to the environment. We do not
accept any responsibility for any
violation of patent rights or other third
person rights resulting from the use of
the inverter.
STUDER INNOTEC keeps the right to
modify their products without previous
notice.

JT8 Remote control for AJ 1000­2400

Functions on remote control are the

same as control and
indicator on the inverter
(see chapter Use)

Remote control should
be connected with the
inverter with the original
10m. STUDER cable or

any RJ11/6p 1:1 cable up to max 50m.

STUDER INNOTEC AJ

AJ V2.1 8/24

Technical data

ODEL AJ 275 AJ 350 AJ 400 AJ 500 AJ 600 AJ 700

Battery voltage (V) 12 24 48 12 24 48
Input voltage (V) 10.5 - 16 21 - 32 42 - 64 10.5 - 16 21 - 32 42 - 64

ontinuous / 30’ power (VA) 200/275 300/350 300/400 400/500 500/600 500/700

tand-by / ON @ no load (W) 0.3*/1.9 0.3*/3.3 0.4*/5 0.3/3.8 0.4/8.5 1/10
Maximum efficiency (%) 93 94 94 93 94 94
Dim. 142 x 84 x L (mm) L= 163 240

ight (kg) 2.4 2.6 2.6 4.5
Remote control plug (RCM-01) Option Option
Load detect. (Stand-by) 1-20 W with option S V

olar charge controller (-S) 10A 15A

ODEL AJ 1000 AJ 1300 AJ 2100 AJ 2400

Battery voltage (V) 12 24 12 24
Input voltage (V) 10.5 - 16 21 - 32 10.5 - 16 21 - 32

ontinuous / 30’ power (VA) 800/1000 1000/1300 2000/2100 2000/2400

tand-by / ON @ no load (W) 0.3 / 9 0.4 / 10 0.5 / 13 0.4 /18
Maximum efficiency (%) 93 94 92 94
Dim. 142 x 84 x L (mm) L= 428 273 x 399 x 117

eight in kg. (approx.) 8.5 19 18
Remote control (JT8) Option Option
Load detect. (Stand-by) 1-20 W v V

olar charge controller (-S) 25A 30A

utput voltage Sine wave 230V +/-5% (115V +/-5%)

Frequency 50 Hz +/- 0.05 % (60 Hz +/-0.05%)

entilation From 45° C

verheating protection v
verload protection v

hort circuit protection v

IP protection index IP 30 (AJ 2100-2400 = IP 20)

os ϕ

0.1-1

E norm (ECE-R 10) All models in 12 and 24V are certified

* Stand-by supplied along with the option –S (solar charge controller)