Ledvance LT-50K F2 User manual

w
USER MANUAL
LEDVANCE THREE PHASE INVERTER
LT-(50-60)K F2
LEDVANCE.COM

2
CONTENTS
Document No.: LDV-LT-50/60-F2-01-UM_11.2023
INTRODUCTION
PRODUCT DESCRIPTION ______________________________________________________________________2
PACKAGING__________________________________________________________________________________3
SAFETY INSTRUCTIONS
SAFETY SYMBOLS ____________________________________________________________________________4
GENERAL SAFETY INSTRUCTIONS ______________________________________________________________4
NOTICE FOR USE _____________________________________________________________________________5
NOTICE FOR DISPOSAL________________________________________________________________________5
ENVIRONMENTAL CONSIDERATIONS ___________________________________________________________6
INSTALLATION
OTHER ENVIRONMENTAL CONSIDERATIONS ___________________________________________________7
PRODUCT HANDLING _________________________________________________________________________8
MOUNTING THE INVERTER_____________________________________________________________________9
WALL MOUNTING ___________________________________________________________________________ 10
RACK MOUNTING___________________________________________________________________________ 11
INSTALL MOUNTING PLATE _________________________________________________________________ 12
ELECTRICAL CONNECTIONS _________________________________________________________________ 14
GROUNDING _______________________________________________________________________________ 15
CONNECT PV SIDE OF INVERTER ____________________________________________________________ 17
DC CONNECTION HIGH VOLTAGE DANGER NOTICE ____________________________________________ 19
CONNECT GRID SIDE OF INVERTER ___________________________________________________________ 19
OVER-CURRENT PROTECTION DEVICE (OCPD) FOR THE AC SIDE ________________________________ 19
CONNECTING THE INVERTER TO THE UTILITY GRID __________________________________________ 20
WIRING PROCEDURE _______________________________________________________________________ 20
COMMUNICATION & MONITIORING
INVERTER MONITORING CONNECTION _______________________________________________________ 25
MONITORING FOR A SINGLE INVERTER_______________________________________________________ 25
MONITORING FOR MULTIPLE INVERTERS_____________________________________________________ 25
DRM CONNECTION/ LOGIC INTERFACE CONNECTION __________________________________________ 26
METER CONNECTION _______________________________________________________________________ 28
COMMISSIONING
SELECTING THE APPROPRIATE GRID STANDARD _____________________________________________ 30
CHANGING THE GRID STANDARD ___________________________________________________________ 30

3
CONTENTS
Document No.: LDV-LT-50/60-F2-01-UM_11.2023
SETTING A CUSTOM GRID STANDARD _______________________________________________________ 31
PRELIMINARY CHECKS _____________________________________________________________________ 31
DC CONNECTIONS__________________________________________________________________________ 31
AC CONNECTIONS__________________________________________________________________________ 32
DC CONFIGURATION ________________________________________________________________________ 32
AC CONFIGURATION ________________________________________________________________________ 32
START-UP AND SHUTDOWN
START-UP PROCEDURE ____________________________________________________________________ 33
SHUTDOWN PROCEDURE___________________________________________________________________ 33
NORMAL OPERATION
MAIN MENU ________________________________________________________________________________ 34
INFORMATION ______________________________________________________________________________ 34
SETTINGS__________________________________________________________________________________ 36
ADVANCED INFO - TECHNICIANS ONLY ______________________________________________________ 37
ADVANCED SETTINGS - TECHNICIANS ONLY __________________________________________________ 40
SWITCH ON/OFF ___________________________________________________________________________ 41
RESTORE SETTINGS________________________________________________________________________ 44
INTERNAL EPM SET _________________________________________________________________________ 44
RESTART HMI ______________________________________________________________________________ 48
FAN TEST __________________________________________________________________________________ 49
DSP UPDATE _______________________________________________________________________________ 49
COMPENSATION SET________________________________________________________________________ 49
I/V CURVE__________________________________________________________________________________ 50
AFCI FUNCTION ____________________________________________________________________________ 51
MAINTENANCE
NIGHT TIME PID-RECOVERY FUNCTION _______________________________________________________ 52
FAN MAINTENANCE _________________________________________________________________________ 53
TROUBLESHOOTING
INVERTER MESSAGES ______________________________________________________________________ 54
APPENDIX
GRID STANDARD SELECTION GUIDE _________________________________________________________ 58

2
INTRODUCTION
Document No.: LDV-LT-50/60-F2-01-UM_11.2023
PRODUCT DESCRIPTION
Ledvance three phase string inverters covered in this user instruction are suitable for residential, commercial and
utility scale projects. This manual covers the three phase inverter model listed below:
LT-50K F2, LT-60K F2.
DC Switch
4pin COM Port
AC output
DC input 16pin COM Port
Bottom view
LED lights
LCD
display
4 buttons
Front view

3
INTRODUCTION
Document No.: LDV-LT-50/60-F2-01-UM_11.2023
PACKAGING
When you receive the inverter, please ensure that all the parts listed below are included:
If anything is missing, please contact your local Ledvance distributor.
AC terminal cover x1
Quick Installation Manual x1
Inverter x1
Back plate x1
Cross screws (M4*14) x4
Cross Recessed
Hexagon Bolt (M6*12) x2
16pin COM Connector x1
Unlocking tool x1
DC connectors
50K x10, 60K x12

4
SAFETY INSTRUCTIONS
Document No.: LDV-LT-50/60-F2-01-UM_11.2023
SAFETY SYMBOLS
Safety symbols used in this manual, which highlight potential safety risks and important safety information, are
listed as follows:
DANGER
WARNING symbol indicates important safety instructions, which if not correctly
followed, could result in serious injury or death.
NOTE
“Note” provides tips that are valuable for the optimal operation of your product.
CAUTION
CAUTION, RISK OF ELECTRIC SHOCK symbol indicates important safety
instructions, which if not correctly followed, could result in electric shock.
CAUTION
CAUTION, HOT SURFACE symbol indicates safety instructions, which if not
correctly followed, could result in burns.
GENERAL SAFETY INSTRUCTIONS
WARNING
Please do not connect PV array positive(+) or negative(-) to ground, it could cause
serious damage to the inverter.
WARNING
Electrical installations must be done in accordance with the local and national
electrical safety standards.
WARNING
To reduce the risk of fire, over-current protective devices (OCPD) are required for
circuits connected to the Inverter.
The DC OCPD shall be installed per local requirements. All photovoltaic source
and output circuit conductors shall have disconnecting equipment that comply
with the NEC Article 690, Part II. All Ledvance three phase inverters feature an
integrated DC switch
CAUTION
Risk of electric shock. Do not remove cover. There is no user serviceable parts
inside. Refer servicing to qualified and accredited service technicians.

5
SAFETY INSTRUCTIONS
Document No.: LDV-LT-50/60-F2-01-UM_11.2023
CAUTION
The PV array (Solar panels) supplies a DC voltage when they are exposed to
sunlight.
CAUTION
Risk of electric shock from energy stored in capacitors of the Inverter.
Do not remove cover for 5 minutes after disconnecting all power sources (service
technician only). Warranty may be voided if the cover is removed without
authorization.
CAUTION
The surface temperature of the inverter can exceed 75°C(167°F).
To avoid risk of burns, DO NOT touch the surface when inverter is operating. The
inverter must be installed out of reach of children.
NOTICE FOR USE
The inverter has been constructed according to the applicable safety and technical guidelines. Use the inverter in
installations that meet the following specifications ONLY:
- Permanent installation is required.
- The electrical installation must meet all the applicable regulations and standards.
- The inverter must be installed according to the instructions stated in this manual.
- The inverter must be installed according to the correct technical specifications.
- To start-up the inverter, the Grid Supply Main Switch (AC) must be switched on, before the solar panel's DC
isolator shall be switched on. To stop the inverter, the Grid Supply Main Switch (AC) must be switched off before
the solar panel's DC isolator shall be switched off.
NOTICE FOR DISPOSAL
This product shall not be disposed of with household waste. They should be segregated
and brought to an appropriate collection point to enable recycling and avoid potential
impacts on the environment and human health. Local rules in waste management shall be
respected .

6
INSTALLATION
Document No.: LDV-LT-50/60-F2-01-UM_11.2023
ENVIRONMENTAL CONSIDERATIONS
Select a location for the inverter
When selecting a location for the inverter, consider the following:
WARNING: RISK OF FIRE
Despite careful construction, electrical devices can cause fire.
-Do not install the inverter in areas containing highly flammable materials or gases.
-Do not install the inverter in potentially explosive atmosphere.
-The mounting structure where the inverter is installed must be fireproof.
-The temperature of the inverter heat-sink can reach 75°C.
-The inverter is designed to work in an ambient temperature range between -25 to 60°C.
-If multiple inverters are installed on site, a minimum clearance of 500mm should be kept between each
inverter and all other mounted equipment. The bottom of the inverter should be at least 800mm above of
the ground or floor.
-The LED status indicator lights and the LCD located on the inverter's front panel should not be blocked.
-Adequate ventilation must be present if the inverter is to be installed in a confined space.
NOTE
Nothing should be stored on or placed against the inverter.
500mm
500mm
500mm
800mm
Distances required between inverters

7
INSTALLATION
Document No.: LDV-LT-50/60-F2-01-UM_11.2023
OTHER ENVIRONMENTAL CONSIDERATIONS
Consult technical data
Consult the specifications section for additional environmental conditions (protection rating, temperature,
humidity, altitude, etc.).
Vertical wall installation
This model of Ledvance inverter should be mounted vertically (90 degrees or backwards 15 degrees).
Avoiding direct sunlight
Installation of the inverter in any location exposed to direct sunlight should to be avoided. Direct exposure to
sunlight could cause:
Power output limitation (with a resulting decreased energy production by the system).
Premature wear of the electrical/electromechanical components.
Premature wear of the mechanical components (gaskets) and user interface.
Recommended installation locations

8
INSTALLATION
Document No.: LDV-LT-50/60-F2-01-UM_11.2023
Air circulation
Do not install in small, closed rooms where air cannot freely circulate. To prevent overheating, always ensure that
the air flow around the inverter is not blocked.
Flammable substances
Do not install near flammable substances. Maintain a minimum distance of three meters (ten feet) from such
substances.
Living area
Do not install in a living area where the prolonged presence of people or animals is expected. Depending on
where the inverter is installed (for example: the type of surface around the inverter, the general properties of the
room, etc.) and the quality of the electricity supply, the sound level from the inverter can be quite high.
PRODUCT HANDLING
Please review the instruction below for handling the inverter:
-The red circles below denote cutouts on the product package.
Push in the cutouts to form handles for moving the inverter .
-Two people are required to remove the inverter from the shipping box. Use the handles integrated into
the heat sink to remove the inverter from the carton.
Handles used to move the inverter shown circled in red