Unipower SLI 15 User manual

USER GUIDE
SLI 15 INVERTER
www.unipowerco.com
Manual No. SLI-15-G-3a © 2018 UNIPOWER LLC
All Rights Reserved
sli15-userguide-rev3a-0718.indd
UNIPOWER LLC • 3900 Coral Ridge Drive, Coral Springs, Florida 33065, USA • [e-mail]
North America: [phone] • Europe: [phone]
POWERING TECHNOLOGY

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POWERING TECHNOLOGY
Manual No. sli-15-G-3a sli15-userguide-rev3a-0718.indd
CONTENTS
1 The Display................................................................................................................................3
2 Startup Sequence and Standby Status........................................................................................4
3 Operating Modes........................................................................................................................5
4 Controller Status ........................................................................................................................5
5 Main Menus...............................................................................................................................6
6 Setting Menus ............................................................................................................................6
7 Status Menu .............................................................................................................................15
8 Info Menu.................................................................................................................................16
Appendix A - Service Menu...........................................................................................................17
Appendix B - Factory Settings.......................................................................................................19

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POWERING TECHNOLOGY
Manual No. sli-15-G-3a sli15-userguide-rev3a-0718.indd
1 The Display
POWER O.T. FAN FAIL FAULT
Function of keys LEDs for operating status
<UP> / <DOWN> keys
Use to scroll through menus Four front-panel LED’s show inverter status
<UP> key
<DOWN> key
<ESC> key
Use to exit from the current menu
<ENTER> key
Use to confirm a selection or value
<ON/OFF> key
Use to turn ON or Stand-by (OFF) the unit.
O.T.POWER FAN FAIL FAULT
"POWER" (green)
-The "POWER" LED is lighted on as soon as the unit starts
supplying power to the load
-It indicates normal operation.
"O.T." (red)
-When lighted on it indicates that the internal temperature is
approaching the thermal shutdown threshold. In addition to
the visual indication, the unit sounds audibly.
"O.T." and "FAULT" (red)
-The thermal shutdown threshold has been exceeded.
Note: The thresholds are factory set and not changeable
(see "Factory Settings" on "Appendix B").
"FAN FAIL" (red)
-The "FAN FAIL" LED is lighted on when the speed of one of
the fan falls below its nominal value.
"FAULT" and "FAN FAIL"
-They are lighted up at the same time if more than one fan
has stopped or a general malfunction is detected. The unit
continues to works until an OT is detected.
"FAULT" (red)
-"FAULT" LED is lighted on when a general failure happens.
(for general fault conditions see table below)
GENERAL FAILURE CONDITIONS
-Failure of at least 2 fans
-Over Temperature
-Output Over Current
(the protective output breaker on front panel,
trips and a "Breaker OFF" state is indicated on
the display.)
-Output Over Voltage
-Output Under Voltage
-Dc input voltage out of range (UV or OV)
-DC Input Over Current

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POWERING TECHNOLOGY
Manual No. sli-15-G-3a sli15-userguide-rev3a-0718.indd
2 Startup sequence and the Standby Status
The STAND BY status shows the DC source is connected; loads are disconnected by two internal relays.
As soon as the DC input voltage is applied, "STANDBY…" is displayed.
Three operations are possible (see Fig.1):
(a) Press <ESC> to enter into the SETTINGS menu's first page, or
(b) Press <ENTER> to visualize the configuration mode of the unit. Two screens are presented
automatically within a few seconds. The first (1) shows the mode of the unit (Stand Alone or Parallel
mode). In case of Parallel mode the screen tells whether the unit is master or slave. In case of Stand
Alone mode the units is always a master The second screen (2) shows if the unit has the optional Static
Transfer Switch.
Pressing the "ESC" key shows the SETTINGS menu’s first page, or
(c) Press <ON/OFF> to power up the unit. The display shows "STARTING…" and the screen (3) appeares
automatically after a few seconds. Using <UP> / <DOWN> keys it is possible to scroll six screens on the
display and visualize the electrical parameters (Vout/Iout, Vout/Freq, Iout/Pout,…). Pressing <ENTER>
the screen (1) is visualized for short time, then the display goes back to the previous screen
automatically.
Pressing <ESC> the SETTINGS menu is displayed.
(
2
)
(
1
)
Transfer Switch
….
Vgrid = x.x Vac
Igrid = x.x A
ENTER
ENTER
ESC
(
3
)
Master Ad.1
Parallel Mode 2
STARTING..…
To SETTINGS
Menu
ON/OFF
STAND BY…
ESC
Figure 1
To SETTINGS
Menu
2 Startup sequence and the Standby Status
The STAND BY status shows the DC source is connected; loads are disconnected by two internal relays.
As soon as the DC input voltage is applied, "STANDBY…" is displayed.
Three operations are possible (see Fig.1):
(a) Press <ESC> to enter into the SETTINGS menu's first page, or
(b) Press <ENTER> to visualize the configuration mode of the unit. Two screens are presented
automatically within a few seconds. The first (1) shows the mode of the unit (Stand Alone or Parallel
mode). In case of Parallel mode the screen tells whether the unit is master or slave. In case of Stand
Alone mode the units is always a master The second screen (2) shows if the unit has the optional Static
Transfer Switch.
Pressing the "ESC" key shows the SETTINGS menu’s first page, or
(c) Press <ON/OFF> to power up the unit. The display shows "STARTING…" and the screen (3) appeares
automatically after a few seconds. Using <UP> / <DOWN> keys it is possible to scroll six screens on the
display and visualize the electrical parameters (Vout/Iout, Vout/Freq, Iout/Pout,…). Pressing <ENTER>
the screen (1) is visualized for short time, then the display goes back to the previous screen
automatically.
Pressing <ESC> the SETTINGS menu is displayed.
(
2
)
(
1
)
Transfer Switch
….
Vgrid = x.x Vac
Igrid = x.x A
ENTER
ENTER
ESC
(
3
)
Master Ad.1
Parallel Mode 2
STARTING..…
To SETTINGS
Menu
ON/OFF
STAND BY…
ESC
Figure 1
To SETTINGS
Menu

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POWERING TECHNOLOGY
Manual No. sli-15-G-3a sli15-userguide-rev3a-0718.indd
•
3 Operating modes
The unit has two operating modes:
-Stand Alone mode: there is only one inverter in the system
-Parallel mode: there are several inverters working in parallel (max. number of parallelable units: 8)
The default mode is Stand-Alone.
Trained personnel should set the operating mode before the system starts supplying the load (see SERVICE
menu on "Appendix A").
It is possible but not recommended to change the operating mode while the inverter is operating.
ATTENTION: incorrect unit setting may lead the system to latch up
Notes
When the unit work in Parallel mode it is not possible to change the following parameters in the
SETTINGS menu: Vout, Iout, Frequency. The access to these parameters is locked to avoid system
conflicts (see also Notes on page 8).
4 Controller status
When operating in Parallel mode the controller inside each unit can operate in two modes:
-Master: provides the commands for the whole system of paralleled inverters. There is only one master.
-Slave: it follows the commands of the Master
When working in Stand Alone mode the status of the unit is Master.
Controller statuses are assigned automatically and cannot be changed by the user. In case of failure of the
master in a parallel configuration a new master is selected automatically and control of the system of
paralleled inverters is transferred automatically to the new master.

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Manual No. sli-15-G-3a sli15-userguide-rev3a-0718.indd
5 Main menus
There are 3 main Menus (Fig.2):
-The SETTINGS menu
-The STATUS menu
-The INFO menu
6 The SETTINGS menu
6.1 Overview
Through this menu it is possible to set several parameters of the unit. To avoid problems make sure you
know how the parameters will affect the load.
To access the SETTINGS menu contents a 1ST level password must be provided.
For increased protection certain sensitive parameters are protectyed by a 2ND level password that an
Authorized operator must provide.
Settings changeable by Generic operator (1ST level password)
-Unit Serial Port Address, Vout, Ilimit, Frequency.
-Protections (AutoRestart or Latched types)
-Display Light (ON/OFF), Time Display Light ON and Key Click
-Autostart, Remote ON/OFF
-New Password 1ST level only
Settings changeable by Authorized operator (2ND level password)
These settings are accessible via the SERVICE submenu whose access is protected by the 2ND level
password.
-Operating mode, 2ND levelPassword, Restore data, Utility menu, System Time-out.
These settings are contained in the UTILITY submenu contained in the SERVICE submenu (no password
needed to access UTILITY from SERVICE, see Fig.2 and also Appendix A).
-Change the Led Status (ON/OFF)
-Set the Buzzer (ON/OFF)
-Set the Fans (ON/OFF) and the Fan Speed
-Read fan Speed, System Temperature, Internal Temperature and Ambient Temperature
NOTE:
-The SERVICE submenu should be accessed by trained personnel only. An error in these settings
could seriously damage the system.
-To avoid potential conflicts during the operating procedures, it is preferable to keep the unit in
STANDBY status before accessing and acting on the SERVICE submenu.

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Manual No. sli-15-G-3a sli15-userguide-rev3a-0718.indd
6.2 Navigating the SETTINGS menu
Figure 2
SETTINGS menu
STATUS menu
INFO menu
>> 2nd level Password >> SERVICE submenu
UTILITY submenu
To know the unit configuration (Stand-Alone, Parallel Mode, Master,…)
To get info about the unit's Part Number, Serial Number and Firmware
revision number.
To set the programmable unit parameters
SETTINGS Menu - - >
1.0
Idle for the sub-menu
Navigator
Gives the current position on the menu and sub menu map
X.0 : shows the main menu start page.
X = 1 for SETTINGS menu
X = 2 for STATUS menu
X = 3 for INFO menu.
X.1 or X.2 or X.3 etc.
numbers coming after the point indicate any 1ST level submenu items
X.1.1 or X.1.2 or X.1.3 etc.
n
u
m
be
r
s
co
min
g
a
f
te
r
t
h
e
seco
n
d
po
in
t,
m
a
rk
a
n
y
2ND l
e
v
e
l
sub
m
e
n
u
i
te
m
s
6.2 Navigating the SETTINGS menu
Figure 2
SETTINGS menu
STATUS menu
INFO menu
>> 2nd level Password >> SERVICE submenu
UTILITY submenu
To know the unit configuration (Stand-Alone, Parallel Mode, Master,…)
To get info about the unit's Part Number, Serial Number and Firmware
revision number.
To set the programmable unit parameters
SETTINGS Menu - - >
1.0
Idle for the sub-menu
Navigator
Gives the current position on the menu and sub menu map
X.0 : shows the main menu start page.
X = 1 for SETTINGS menu
X = 2 for STATUS menu
X = 3 for INFO menu.
X.1 or X.2 or X.3 etc.
numbers coming after the point indicate any 1ST level submenu items
X.1.1 or X.1.2 or X.1.3 etc.
n
u
m
be
r
s
co
min
g
a
f
te
r
t
h
e
seco
n
d
po
in
t,
m
a
rk
a
n
y
2ND l
e
v
e
l
sub
m
e
n
u
i
te
m
s

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POWERING TECHNOLOGY
Manual No. sli-15-G-3a sli15-userguide-rev3a-0718.indd
Example:
2
ND
level submenu
1
ST
level submenu
"……" - - >
1.1.2
"……" - - >
1.1.1
SETTINGS Menu - - >
1.0
"……" - - >
1.2
"……" - - >
1.1
Figure 3

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POWERING TECHNOLOGY
Manual No. sli-15-G-3a sli15-userguide-rev3a-0718.indd
6.3 Structure of the SETTINGS menu
Sub- Menu
2nd Level
Input UV
Input OV
Input UC
Output UV
Output OV
Output OC
1For the Protections operating procedure, please see page 12.
2For the Tranfer Switch operating procedure, please see page 13.
Sub- Menu
3rd Level
Input UV:
Restart xx Times
Input OV:
Restart xxTimes
Input OC:
Restart xx Times
Output UV:
Restart xx Times
Output OV:
Restart xx times
Outpu OC:
Restart xx Times
Protections1
(
*
)
ENT/
ESC Sub- Menu
4th Level
Input UV:
Wait Time xx Sec
Input OV:
Wait Time xx Sec
Input OC:
Wait Time xx Sec
Output UV:
Wait Time xx Sec
Output OV:
Wait Time xx Sec
Output OC:
Wait Time xx Sec
ENT/
ESC ENT/
ESC
Figure 4.1
Up/
Down
SETTINGS Menu - - >
1.0
Sub- Menu
1st Level
Set Address
Set Vout
Set Limit
Set Frequency
Protections1
Display light
Key Click
AUTO-START
Remote ON/OFF
Service
New password
Transfer Switch2
Sub- Menu
2nd Level
Address =xx
Vout =xxx.x Va-c
Ilimit =xxx.x Apk
F =xx.xx Hz
ENT/
ESC
ENT/
ESC
Password
****
ESC
(*)
Light ON/OFF
Key Click ON/OFF
A-S ON/OFF
Remote ON/OFF
See Appendix A
Insert password
STATUS
Sub- Menu 3 Level
ENT/
ESC r
d
INFO Menu Set Voltage Mask
Down
V Mask = xx (%)
Set RMS Voltage
Tolerance Vrms Tol.= xx (%)
F Tol.=xx (%)
Time = xx sec.
Mode X
Connected ON/OFF
Set Frequency
Tolerance
Set Restore Time
Transfer Switch
Operat. Mode2
Manual Switch
Up/
Figure 4

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POWERING TECHNOLOGY
Manual No. sli-15-G-3a sli15-userguide-rev3a-0718.indd
6.4 SETTINGS menu: access and submenus
You can access the SETTINGS menu starting from the STAND BY… status just by pressing the <ESC> key
or, alternatively, the <ENTER> key: see Fig.1 on page 3.
The access is protected by the 1ST level password. The default password is “0000”. To insert the "0"
character press the <ENTER> key on front panel.
With the <UP> and <DOWN> keys you can scroll all the sub-menus listed in Fig.4. Use <ENTER> to select
one of them.
The sequence of the 1ST level submenus with the setting parameters is described below (PROTECTIONS
and SERVICE submenus are addressed on the following pages).
Use <UP> and <DOWN> keys to set the "xx" parameters at the desired value. Then press <ENTER> to
confirm.
SET Vout
Set Vout - - >
1.2
Vout = xxx.x Vac - - >
1.2.1
-To set the Vout value as follows:
230Vac models: from 200Vac to 240V ac with 0.1V resolution
115Vac models: from 100Vac to 121 V ac with 0.1V resolution
- Factory setting:
230Vac models: 230Vac
115Vac models: 115Vac
SET Ilimit
Set Ilimit - - >
1.3
Ilimit = xx.x Apk
1.3.1
-To set the maximum current delivered by the unit
-Setting range:
230Vac models: 1Apk to 8Apk with 0.1A resolution
115Vac models: 0Apk to 14Apk with 0.1A resolution
-Factory setting:
230Vac models: 8 Apk
115Vac models: 14 A
p
k
<ENT> <ENT>
<ENT>
<ENT>
<ENT>
<ENT>
Set Address - - >
1.1 Address= xx - - >
1.1.1
SET Address
-To set the serial port address (Address = "xx").
-The address must be set only when the serial
communication in parallel configuration is used. Otherwise
you can leave the default value.
-Available address range: from 1 to 32
-Default address: 1
Set Backlight Time lenght
Light X
1.6.1
-The back light time lenght can be set from 2 to 60 sec.
- Factory setting: 20sec.
Display Light - - >
1.6
Set Key Click ON/OFF
Key click - - >
1.7
Key Click ON/OFF
1.7.1
-To enable the audible "click" when a key is pressed
-Factory setting: "Click ON"
SET Frequency
f = xx.xx Hz
1.4.1
-Setting range: 47Hz to 63Hz
-Factory setting:
230Vac models: 50Hz
115Vac models: 60Hz
Set frequency - - >
1.4
6.4 SETTINGS menu: access and submenus
You can access the SETTINGS menu starting from the STAND BY… status just by pressing the <ESC> key
or, alternatively, the <ENTER> key: see Fig.1 on page 3.
The access is protected by the 1ST level password. The default password is “0000”. To insert the "0"
character press the <ENTER> key on front panel.
With the <UP> and <DOWN> keys you can scroll all the sub-menus listed in Fig.4. Use <ENTER> to select
one of them.
The sequence of the 1ST level submenus with the setting parameters is described below (PROTECTIONS
and SERVICE submenus are addressed on the following pages).
Use <UP> and <DOWN> keys to set the "xx" parameters at the desired value. Then press <ENTER> to
confirm.
SET Vout
Set Vout - - >
1.2
Vout = xxx.x Vac - - >
1.2.1
-To set the Vout value as follows:
230Vac models: from 200Vac to 240V ac with 0.1V resolution
115Vac models: from 100Vac to 121 V ac with 0.1V resolution
- Factory setting:
230Vac models: 230Vac
115Vac models: 115Vac
SET Ilimit
Set Ilimit - - >
1.3
Ilimit = xx.x Apk
1.3.1
-To set the maximum current delivered by the unit
-Setting range:
230Vac models: 1Apk to 8Apk with 0.1A resolution
115Vac models: 0Apk to 14Apk with 0.1A resolution
-Factory setting:
230Vac models: 8 Apk
115Vac models: 14 A
p
k
<ENT> <ENT>
<ENT>
<ENT>
<ENT>
<ENT>
Set Address - - >
1.1 Address= xx - - >
1.1.1
SET Address
-To set the serial port address (Address = "xx").
-The address must be set only when the serial
communication in parallel configuration is used. Otherwise
you can leave the default value.
-Available address range: from 1 to 32
-Default address: 1
Set Backlight Time lenght
Light X
1.6.1
-The back light time lenght can be set from 2 to 60 sec.
- Factory setting: 20sec.
Display Light - - >
1.6
Set Key Click ON/OFF
Key click - - >
1.7
Key Click ON/OFF
1.7.1
-To enable the audible "click" when a key is pressed
-Factory setting: "Click ON"
SET Frequency
f = xx.xx Hz
1.4.1
-Setting range: 47Hz to 63Hz
- Factory setting:
230Vac models: 50Hz
115Vac models: 60Hz
Set frequency - - >
1.4

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Manual No. sli-15-G-3a sli15-userguide-rev3a-0718.indd
Set Remote ON/OFF
Remote ON/OFF - - >
1.9
ON/OFF
1.9.1
-Remote ON ⇒It is possible to turn ON /OFF the unit
remotely provided that a switch or relay is connected
between pins 6 and 7 of the signal connector on the back
side of the unit. Refer to the Installation Manual".
-Factory Setting: Remote "OFF"
<ENT>
Set Autostart Mode
Autostart - - >
1.8
Autostart ON/OFF
1.8.1
- Auto-Start ON ⇒the unit starts up as soon as the DC inpu t
source connection is made. In this case there is no nee d to
press the <ON/OFF> key on front panel.
- Auto-Start OFF⇒The unit starts up only after <ON/OFF> key
has been pressed.
- Factor
y
settin
g
: Auto-Start OFF
Set New Password
Password ****
1.11.1
-This option allows to change the current password. To set the
new password digits use the <UP> and <DOWN> keys.
-Max. Password length: 4
-Factory setting: "0000"
New Password - - >
1.11
<ENT>
NOTES
The following settings are not accessible when the current configuration unit mode is the Parallel mode.
That is to avoid conflicts within the system. Set Vout , Set I
LIMIT
, Set Frequency, Set Remote ON/OFF.
If the user wants to make changes when operating in Parallel mode, he unit must first of all set to Stand-
Alone mode using the following procedure (to be repeated for each unit working in parallel):
1. Set the unit to Stand-alone mode:
•on the SETTINGS menu select the SERVICE submenu. Press <Enter> to confirm the choice.
•Insert the 2nd level password (default password is “1111”; use the <UP> and <DOWN> keys to select
the digits. Press <Enter> to confirm.
•Select the OPERATING MODE submenu and press <Enter>.
•Change "Mode = 2"(parallel mode) into "Mode =0"(stand-alone mode). Use the <UP> key to insert the
character "0".
2. Change the Vout, I
LIMIT
, Frequency and Remote ON/OFF settings like explained before.
3. After the changes are done restore the parallel mode with the same procedure described in step 1.
It is strongly recommended to set all units with identical Vout, I
LIMIT
, Frequency and Remote ON/OFF values
when working in parallel.
Set Remote ON/OFF
Remote ON/OFF - - >
1.9
ON/OFF
1.9.1
-Remote ON ⇒It is possible to turn ON /OFF the unit
remotely provided that a switch or relay is connected
between pins 6 and 7 of the signal connector on the back
side of the unit. Refer to the Installation Manual".
-Factory Setting: Remote "OFF"
<ENT>
Set Autostart Mode
Autostart - - >
1.8
Autostart ON/OFF
1.8.1
- Auto-Start ON ⇒the unit starts up as soon as the DC inpu t
source connection is made. In this case there is no nee d to
press the <ON/OFF> key on front panel.
- Auto-Start OFF⇒The unit starts up only after <ON/OFF> key
has been pressed.
-Factor
y
settin
g
: Auto-Start OFF
Set New Password
Password ****
1.11.1
-This option allows to change the current password. To set the
new password digits use the <UP> and <DOWN> keys.
-Max. Password length: 4
- Factory setting: "0000"
New Password - - >
1.11
<ENT>
NOTES
The following settings are not accessible when the current configuration unit mode is the Parallel mode.
That is to avoid conflicts within the system. Set Vout , Set I
LIMIT
, Set Frequency, Set Remote ON/OFF.
If the user wants to make changes when operating in Parallel mode, he unit must first of all set to Stand-
Alone mode using the following procedure (to be repeated for each unit working in parallel):
1. Set the unit to Stand-alone mode:
•on the SETTINGS menu select the SERVICE submenu. Press <Enter> to confirm the choice.
•Insert the 2nd level password (default password is “1111”; use the <UP> and <DOWN> keys to select
the digits. Press <Enter> to confirm.
•Select the OPERATING MODE submenu and press <Enter>.
•Change "Mode = 2"(parallel mode) into "Mode =0"(stand-alone mode). Use the <UP> key to insert the
character "0".
2. Change the Vout, I
LIMIT
, Frequency and Remote ON/OFF settings like explained before.
3. After the changes are done restore the parallel mode with the same procedure described in step 1.
It is strongly recommended to set all units with identical Vout, I
LIMIT
, Frequency and Remote ON/OFF values
when working in parallel.

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Manual No. sli-15-G-3a sli15-userguide-rev3a-0718.indd
6.5 SETTINGS menu: the PROTECTIONS submenu
Sub- Menu
4 Level
th
Input UV:
Wait Time xx Sec
Input OV:
Wait Time xx Sec
Input OC:
Wait Time xx Sec
Output UV:
Wait Time xx Sec
Output OV:
Wait Time xx Sec
Output OC:
Wait Time xx Sec
Sub- Menu
Protections
ENT/
ESC Sub- Menu
Restart xx Times
Output UV:
Restart xx Times
Output OV:
Restart xx times
Output OC:
Restart xx Times
ENT/
ESC ENT/ ESC
2 Level
nd
Input UV
Input OV
Input UC
Output UV
Output OV
Output OC
ENT/
ESC
To
SETTINGS
M
e
n
u
3 Level
rd
Input UV:
Restart xx Times
Input OV:
Restart xxTimes
Input OC:
Figure 5
Each type of protection listed on the table in Fig.5 (Input UV, Input OV, Input UC, Output UV, Output OV,
Output OC) , can be customized from the front panel.
After selecting an item listed in the PROTECTIONS submenu (Fig. 5) it is possible to choose between two
types of protection mode: "Restart mode” or "Latch up mode".
Restart mode
The unit tries to restart a certain numbers ("xx") of times, after which the unit latches up.
Set "xx" from 1 to 10 using <UP> and <DOWN> keys. Press <Enter> to confirm. Factory setting = 5 times.
Set "xx" >10 and press the <ENTER> to have the unit continuously try to restart.
Latch up mode
Set "xx" = 0 to cause the unit latch up as soon as the protection occurs.
The default protection mode for all protections is Restart 5 times.
For any protection it is possible to set the wait time between two restart attempts. The wait time has to be
defined in the following range: 2 sec - 60sec max. Factory setting = 5 sec.
6.5 SETTINGS menu: the PROTECTIONS submenu
Sub- Menu
4 Level
th
Input UV:
Wait Time xx Sec
Input OV:
Wait Time xx Sec
Input OC:
Wait Time xx Sec
Output UV:
Wait Time xx Sec
Output OV:
Wait Time xx Sec
Output OC:
Wait Time xx Sec
Sub- Menu
Protections
ENT/
ESC Sub- Menu
Restart xx Times
Output UV:
Restart xx Times
Output OV:
Restart xx times
Output OC:
Restart xx Times
ENT/
ESC ENT/ ESC
2 Level
nd
Input UV
Input OV
Input UC
Output UV
Output OV
Output OC
ENT/
ESC
To
SETTINGS
M
e
n
u
3 Level
rd
Input UV:
Restart xx Times
Input OV:
Restart xxTimes
Input OC:
Figure 5
Each type of protection listed on the table in Fig.5 (Input UV, Input OV, Input UC, Output UV, Output OV,
Output OC) , can be customized from the front panel.
After selecting an item listed in the PROTECTIONS submenu (Fig. 5) it is possible to choose between two
types of protection mode: "Restart mode” or "Latch up mode".
Restart mode
The unit tries to restart a certain numbers ("xx") of times, after which the unit latches up.
Set "xx" from 1 to 10 using <UP> and <DOWN> keys. Press <Enter> to confirm. Factory setting = 5 times.
Set "xx" >10 and press the <ENTER> to have the unit continuously try to restart.
Latch up mode
Set "xx" = 0 to cause the unit latch up as soon as the protection occurs.
The default protection mode for all protections is Restart 5 times.
For any protection it is possible to set the wait time between two restart attempts. The wait time has to be
defined in the following range: 2 sec - 60sec max. Factory setting = 5 sec.
6.5 SETTINGS menu: the PROTECTIONS submenu
Sub- Menu
4 Level
th
Input UV:
Wait Time xx Sec
Input OV:
Wait Time xx Sec
Input OC:
Wait Time xx Sec
Output UV:
Wait Time xx Sec
Output OV:
Wait Time xx Sec
Output OC:
Wait Time xx Sec
Sub- Menu
Protections
ENT/
ESC Sub- Menu
Restart xx Times
Output UV:
Restart xx Times
Output OV:
Restart xx times
Output OC:
Restart xx Times
ENT/
ESC ENT/ ESC
2 Level
nd
Input UV
Input OV
Input UC
Output UV
Output OV
Output OC
ENT/
ESC
To
SETTINGS
M
e
n
u
3 Level
rd
Input UV:
Restart xx Times
Input OV:
Restart xxTimes
Input OC:
Figure 5
Each type of protection listed on the table in Fig.5 (I
nput UV, Input OV, Input UC, Output UV, Output OV,
Output OC) , can be customized from the front panel.
After selecting an item listed in the PROTECTIONS submenu (Fig. 5) it is possible to choose between two
types of protection mode: "Restart mode” or "Latch up mode".
Restart mode
The unit tries to restart a certain numbers ("xx"
) of times, after which the unit latches up.
Set "xx" from 1 to 10 using <UP>
and <DOWN> keys. Press <Enter> to confirm. Factory setting = 5 times.
Set "xx" >10 and press the <ENTER> to hav
e the unit continuously try to restart.
Latch up mode
Set "xx" = 0 to cause the unit latch up as soon as the protection occurs.
The default protection mode for all protections is Restart 5 times.
For any protection it is possible to set the wait time between two restart attempts. The wait time has to be
defined in the following range: 2 sec - 60sec max. Factory setting = 5 sec.

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Manual No. sli-15-G-3a sli15-userguide-rev3a-0718.indd
6.6 SETTINGS menu: the TRANSFER SWITCH submenu
Sub- Menu
2rd Level
Set Voltage Mask
Set RMS Voltage
Tolerance
Set Frequency
Tolerance
Set Restore Time
Transfer Switch
Operat. Mode
Manual Switch
The AC Grid Voltage drops into the "Set Voltage Mask "
⇒the STS does not operate.
Sub- Menu
3rd Level
V Mask = "xx" (%)
VRMS Tolerance= "xx" (%)
F Tolerance="xx" (%)
Time = "xx" sec.
Mode "X"
Connected to the grid
Not Connected
Connected to the Inverter
ENT/
ESC ENT/
ESC
Transfer Switch
To
SETTINGS
M
e
n
u
With the TRANSFER SWITCH submenu you can set t
he Static-Transfer Switch (STS) operation mode for
and define the tolerance of electrical parameters such
as voltage and frequency for the operation with the
STS.
Use <UP> and <Down> keys to set the "xx" parameters
at the desired value. To confirm: press <ENTER> .
SET Voltage Mask
1.12.2
V. Mask = xx % 1.12.1
Set Voltage - - >
Mask (%)
Up/
Down
Figure 6
Up/
Down
ENT
The Voltage Mask defines the range of Vout values for which the STS does not operate.
The Voltage Mask limits are expressed as a percentage “xx” of the Vout (see Set Vout on page 8).For
instance, if you set Vout =230Vac and the Voltage Mask
at 20% then the STS will activate only Vout falls
outside the 184-276Vac range (voltage mask width in Fig.7).
The settable percentage range is 15% to 50%
of Vout. Factory setting: 15%
Example
Assuming that the current setting for STS mode is the ON
-Line mode (the inverter is the primary source for
the load), and that the output voltage is within the
limits of the voltage mask, then the STS remains open
(the load connected to the inverter). Otherwise, w
hen the Vout lies beyond the voltage mask limits, the STS
commutes the load to the grid (which is the
secondary or back-up source in this case).
The check of the Vout is made on its peak values.
Figure 7
Voltage Mask Width
The AC Grid Voltage drops OUT of the " Voltage Mask Width"
⇒the STS operates.

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Manual No. sli-15-G-3a sli15-userguide-rev3a-0718.indd
SET Vrms
Set RMS Voltage - - >
Tolerance 1.12.2
Vrms Tol. = xx %
1.12.2.1
ENT
The STS can operate not only based on the peak value of Vout but also based on the RMS value. With the
"Set VRMS" screen you can define a percentage “xx” of the Vout within which the STS does not operate.
For instance, if Vout =230Vac and VRMS =10% then the STS is activated only if the output RMS value VRMS
falls outside the 253-207Vac range.
The percentage range is 5% to 50% of Vout. Factory setting: 10%
SET Frequency Tolerance
Tolerance (%) 1.12.3
Set Frequency - - >
F Tol. = xx %
1.12.3.1
ENT
-With this screen you can define the max. frequency over which the STS is activated.
-The allowed range is 1 to 10% of the nominal frequency set by the SETTINGS menu (see pag.8: SET
frequency screen). Factory setting: 2%
Example
If the frequency is set on 50Hz in the SETTINGS menu and the Frequency tolerance is set at 3% then the
STS changed state only if the frequency of the primary source exceeds 51.5Hz or falls below 48.5 Hz.
SET Restore Time
Set Restore Time
(sec) - - >
1.12.4 1.12.3.1
Time = xx sec.
ENT
The Restore Time is the time “xx” elapsed after the STS is activated and before the STS attempts to restore
the previous mode. During this time the STS checks the system parameters (Vout, V
GRID
, Frequency,...) to
verify if they all have returned to the normal range, so that the load can be switched back safely to the
primary source.
The Restore time range is 10 - 7200 sec with in increments of 5 seconds. Factory setting: 10seconds.
Set Transfer Switch Mode
Transfer Switch - - >
Operat. Mode 1.12.5
Mode X
1.12.5.1
ENT
The STS can operate in the following modes:
-Mode 0 ("X"=0): ):" OFF Mode": the STS is NOT CONNECTED.
-Mode 1 ("X"=1): On Line mode: the STS normally remains open (the load is connected to the inverter
output), and connects the load to the grid when it closes.
-Mode 2 ("X"=2): Off Line mode: the STS normally remains closed (the load is connected to the grid),
and connects the load to the inverter when it is opens.
-Mode 3 ("X"=3): Manual mode: the STS status is configured by Set Manual Switch screen.
Factory setting: Mode 1 (On-Line mode)

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Manual No. sli-15-G-3a sli15-userguide-rev3a-0718.indd
Set Manual Switch
The MANUAL SWITCH submenu is enabled by the selecting the Mode 3 (Manual mode) setting in the
TRANSFER-SWITCH-MODE submenu.
1.12.6
Manual switch - - > ENT
1.12.6.1
Connected to grid
1.12.6.2
Not Connected
1.12.6.3
Connected to the inverter
With this setting it is possible to force the STS to be connect the load to the grid to the inverter or to
maintain the load disconnected.
7 The STATUS menu
SETTINGS
1st Level
Sub- Menu
Master Ad. "X"
Parallel mode
INFO Menu
STATUS Menu - - >
2.0
UP/
DOWN
UP/
DOWN
ENT
ESC
Serial port
address
Master Ad.1
Parallel Mode 2
Master (or Slave)
Parallel (or Stand - Alone)
Figure 8
The STATUS menu shows:
-the current status (Master or Slave)
-the current configuration mode (Stand Alone mode or Parallel mode)
-the serial port address

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Manual No. sli-15-G-3a sli15-userguide-rev3a-0718.indd
8 The INFO menu
Figure 9
ENT/
ESC
Up/
Down
2nd Level
Sub- Menu
SLI-xx-xxx
1500VA 3.1.1
SN xxxxxx
Week xx Year xx
DC-DC
xxxx-xxxx 3.3.1
DC-AC
xxxx-xxxx 3.3.2
Controller
xxxx-xxxx 3.3.3
Transfer Switch
xxxx-xxxx 3.3.4
UP/
Down
UP/
DOWN
UP/
DOWN
STATUS Menu
SETTINGS
INFO Menu - - >
3.0
ENT/
ESC 1st Level
Sub- Menu
Part Number
Serial number
Firmware
With the INFO menu you can obtain information about:
-Model Number : SLI - xx - xxx
Factory
description code Vinput
(48 or 24)
-Serial Number: factory serial number, including manufacturing week & year
-Firmware revision
DSP Software release for the DC-DC stage
DSP Software release for the DC-AC stage
DSP Software release for the Controller stage
Vout (230 or 115Vac)

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Appendix A : The SERVICE menu
The access to the SERVICE submenu should be reserved to authorized operators only because it allows to
operate on critical system parameters.
To get the access at the SERVICE submenu you have to enter the SETTINGS menu with the 1ST level
password (default password: "0000"), select the sub-menu SERVICE and insert the 2ND level password
(default password: "1111").
Once entered the SERVICE submenu it is possible to conduct the following tasks:
1. Change the operating mode
-Stand-alone mode (default mode) ⇒set the "X" = 0 on the 2ND Level Sub- Menu on Fig.A.1
-Parallel mode ⇒set the "X" = 2 on the 2ND Level Sub- Menu on Fig.A.1
SETTINGS Menu
SERVICE Menu (Reserved Area) 2n
d
Level
Sub- Menu
Mode = "X"
1.10.1.1
New Password
****
Restoring
1.10.3.1
1st Level
Sub- Menu
Operate Mode
1.10.1
New password
1.10.2
Restore E2
Data 1.10.3
Utility 1.10.4
System Time
Out 1.10.5
ENT/
ESC
ENT/
ESC ENT/
ESC
1s
t
level
sub-menu 2n
d
level
sub-menu
Service
Password ****
Service - - >
1.10
UP/
Down
STATUS Menu
(*)
Restart "xx"
Times
1.10.5.1
INFO Menu Up/
Down Wait Time
"xx" sec
1.10.5.2
2n
d
Level
Sub- Menu
ON/OFF Buzzer
ON/OFF Led LCD
ON/OFF Led Power
ON/OFF Led O.T.
ON/OFF Led Fan Fault
ON/OFF Led Fault
ON/OFF Fans
Set Fan Speed
Read Fan Speed
Read System Temp
Read Internal Temp
Read Ambient Temp
(
*
)
Utilit
y
Menu
Up/
Down
Fig.A.1
1. Change the 2ND level Password
Define a new password for the "SERVICE" Menu. The password length is 4 digits. Use the <UP> and
<DOWN> keys to type the characters on the display. Press <ENTER> to confirm.
2. Restore the factory settings
With this option you can restore all the factory settings (see "Appendix B").
Select the items "Restore E2 data" and press <ENTER>. The screen "Restoring" appears on the display.
Press <ENTER> to restore the factory settings.
Appendix A : The SERVICE menu
The access to the SERVICE submenu should be reserved to authorized operators only because it allows to
operate on critical system parameters.
To get the access at the SERVICE submenu you have to enter the SETTINGS menu with the 1ST level
password (default password: "0000"), select the sub-menu SERVICE and insert the 2ND level password
(default password: "1111").
Once entered the SERVICE submenu it is possible to conduct the following tasks:
1. Change the operating mode
-Stand-alone mode (default mode) ⇒set the "X" = 0 on the 2ND Level Sub- Menu on Fig.A.1
-Parallel mode ⇒set the "X" = 2 on the 2ND Level Sub- Menu on Fig.A.1
SETTINGS Menu
SERVICE Menu (Reserved Area) 2n
d
Level
Sub- Menu
Mode = "X"
1.10.1.1
New Password
****
Restoring
1.10.3.1
1st Level
Sub- Menu
Operate Mode
1.10.1
New password
1.10.2
Restore E2
Data 1.10.3
Utility 1.10.4
System Time
Out 1.10.5
ENT/
ESC
ENT/
ESC ENT/
ESC
1s
t
level
sub-menu 2n
d
level
sub-menu
Service
Password ****
Service - - >
1.10
UP/
Down
STATUS Menu
(*)
Restart "xx"
Times
1.10.5.1
INFO Menu Up/
Down Wait Time
"xx" sec
1.10.5.2
2n
d
Level
Sub- Menu
ON/OFF Buzzer
ON/OFF Led LCD
ON/OFF Led Power
ON/OFF Led O.T.
ON/OFF Led Fan Fault
ON/OFF Led Fault
ON/OFF Fans
Set Fan Speed
Read Fan Speed
Read System Temp
Read Internal Temp
Read Ambient Temp
(
*
)
Utilit
y
Menu
Up/
Down
Fig.A.1
1. Change the 2ND level Password
Define a new password for the "SERVICE" Menu. The password length is 4 digits. Use the <UP> and
<DOWN> keys to type the characters on the display. Press <ENTER> to confirm.
2. Restore the factory settings
With this option you can restore all the factory settings (see "Appendix B").
Select the items "Restore E2 data" and press <ENTER>. The screen "Restoring" appears on the display.
Press <ENTER> to restore the factory settings.
Appendix A : The SERVICE menu
The access to the SERVICE submenu should be reserved to authorized operators only because it allows to
operate on critical system parameters.
To get the access at the SERVICE submenu you have to enter the SETTINGS menu with the 1ST level
password (default password: "0000"), select the sub-menu SERVICE and insert the 2ND level password
(default password: "1111").
Once entered the SERVICE submenu it is possible to conduct the following tasks:
1. Change the operating mode
-Stand-alone mode (default mode) ⇒set the "X" = 0 on the 2ND Level Sub- Menu on Fig.A.1
-Parallel mode ⇒set the "X" = 2 on the 2ND Level Sub- Menu on Fig.A.1
SETTINGS Menu
SERVICE Menu (Reserved Area) 2n
d
Level
Sub- Menu
Mode = "X"
1.10.1.1
New Password
****
Restoring
1.10.3.1
1st Level
Sub- Menu
Operate Mode
1.10.1
New password
1.10.2
Restore E2
Data 1.10.3
Utility 1.10.4
System Time
Out 1.10.5
ENT/
ESC
ENT/
ESC ENT/
ESC
1s
t
level
sub-menu 2n
d
level
sub-menu
Service
Password ****
Service - - >
1.10
UP/
Down
STATUS Menu
(*)
Restart "xx"
Times
1.10.5.1
INFO Menu Up/
Down Wait Time
"xx" sec
1.10.5.2
2n
d
Level
Sub- Menu
ON/OFF Buzzer
ON/OFF Led LCD
ON/OFF Led Power
ON/OFF Led O.T.
ON/OFF Led Fan Fault
ON/OFF Led Fault
ON/OFF Fans
Set Fan Speed
Read Fan Speed
Read System Temp
Read Internal Temp
Read Ambient Temp
(
*
)
Utilit
y
Menu
Up/
Down
Fig.A.1
1. Change the 2ND level Password
Define a new password for the "SERVICE" Menu. The password length is 4 digits. Use the <UP> and
<DOWN> keys to type the characters on the display. Press <ENTER> to confirm.
2. Restore the factory settings
With this option you can restore all the factory settings (see "Appendix B").
Select the items "Restore E2 data" and press <ENTER>. The screen "Restoring" appears on the display.
Press <ENTER> to restore the factory settings.

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Manual No. sli-15-G-3a sli15-userguide-rev3a-0718.indd
3. UTILITY
This submenu is reserved to manufacturer’s personnel for testing the operative condition of the LED’s
and fans, as well as to monitor the temperature. We recommend you do not change the factory settings
in this submenu.
4. SET THE TIME OUT
The Time Out is the time waited by the unit before attempting to start again after a general fault is
occurred.
Restart mode
The "Restart Mode" can be the "Restart xx times" mode or the "Restart always" mode.
The unit tries to restart a certain numbers ("xx") of times, after which the unit latches up.
Set "xx" from 1 to 10 using <UP> and <DOWN> keys. Press <Enter> to confirm. Factory setting = 5
times.
Set "xx" >10 and press the <ENTER> to have the unit continuously try to restart.
The default protection mode for all protections is Restart 5 times.
Wait Time
The Wait Time is the time between two restart attempts (only for the "Restart xx times" mode).
The Wait Time can be defined in the following range: 2sec to 60sec. Factory setting = 5 sec.

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Manual No. sli-15-G-3a sli15-userguide-rev3a-0718.indd
Appendix B: factory settings
FACTORY SETTINGS TABLE
(values on brackets refer to the 115Vac Inverter Version)
SETTINGS MENU
Options Default assignaments
-Password 0000
-Vout 230Vac (115Vac)
-Frequency 50Hz (60Hz)
-Ilimit 8Apk (14Apk)
-Display light length 20 sec.
-Key click ON/OFF ON
-Auto-start ON/OFF Auto-start OFF
-Remote ON/OFF Remote OFF
-
PROTECTIONS MENU (Sub-Menu of SETTINGS MENU)
-Mode Auto-restart (all protections)
-Restart Attemps 5 times
-Wait Time (between 2 attemps) 5 sec.
TRANSFER SWITCH MENU (Sub Menu of SETTINGS MENU)
-Voltage Mask 15% Vout
-RMS Voltage Tolerance10% Vout
-Frequency Tolerance 2% of nominal frequency
-Restore Time 10 sec.
-Operat. Mode "On-Line " = "Mode 1"
SERVICE MENU (Sub-Menu of SETTINGS MENU)
-Password 1111
-Operat. Mode "Stand-alone" = "Mode 0"
System Time-out
-Mode Auto-restart
-Restart Attemps 5 times
-Wait Time (between 2 attemps) 5 sec.
This document is believed to be correct at time of publication and UNIPOWER LLC accepts no responsibility for
consequences from printing errors or inaccuracies. Specications are subject to change without notice.