ZUCCHETTI 50000TL, 60000TL, 70000TL User Manual

Identificazione: MD-AL-GI-00

Rev. 4.0 del 31.01.18 - Applicazione:

GID

Reg. Pile IT12110P00002965 - Capitale Sociale € 100.000,00 I.V.
Reg. Impr. AR n.03225010481 - REA AR - 94189
Azienda Certificata ISO 9001 - Certificato n. 9151 - CNS0 - IT-17778

Zucchetti Centro Sistemi S.p.A. - Green Innovation Division
Via Lungarno, 248 - 52028 Terranuova Bracciolini - Arezzo, Italy
tel. [phone] - fax. [phone]
[e-mail] - [e-mail] – www.zcsazzurro.com

Grid-connected inverter

50K – 70K TL

User Manual

V1.1 (07-06-2019)

Identificazione: MD-AL-GI-00
Rev. 4.0 del 31.01.18 - Applicazione: GID

Manual of 07/06/2019 Rev. 1.1“User Manual for 50K-70K TL”

Table of Contents

1. Preliminary safety instructions………………………………………...…….…………………………………………………………….6

1.1. Safety instructions…..………………………………………………………..…………………………………………..………………..6

1.2. Symbols and icons……………………………………………………………….…………………………………………………………9

2. Product features……………….……………………………………………………….………….……………………………………………10

2.1. Product overview……….…………………………………………………...…………………………………….……………………..10

2.2. Description of functions……………………………………………………………………………………….……………………....15

2.3. Module protection………………………………………………………………..………………………………………………………18

2.4. Efficiency and derating curves.…………………………………………………………………………….……………………….18

3. Installation..………………………………………………………………………………………………………………………………………20

3.1. Installation procedure…………………………………………………………………...…………………….………………………21

3.2. Checks before installation…………………………………………………………………………………………………………….21

3.3. Installation tools…………………………………………………………………………….…………………………………………….22

3.4. Installation position………………………………………………………………………….….………………………………………24

3.5. Moving the 50K-70K TL inverter……….…………………………………………………….…………………………………….26

3.6. Installing the 50K-70K TL

inverter.………………………………………………………………………………………………..27

4. Electrical connections.……………..…………………………………………………………………..……………………….…………….28

4.1. Electrical connections.……………..…………………………………………………………………..……………………….………28

4.2. Connecting the PNGD ground cable……………..……………………………………………...………………………………..29

4.3. Connecting the DC input power cables………………………….…………..…………………….…………………………….30

4.4. Connecting the AC output power cables……………………...………………..……………………..………………………..34

4.5. Connecting the communication cables……………………...…………………………………………..………………………37

5. Commissioning the inverter……..………………………………………………………..…………………………….……………….....45

5.1. Safety inspection before commissioning………………………………………………………………………….…………….45

5.2. Starting the inverter……………………………………………………………………………………………………………………. 45

6. Operating interface..…………………………………………………………………………………………………………………………..46

6.1. Operating panel and display………………………………………………………………………………….…………..………….46

6.2. Main interface………………………………………………………………..…………………..…………………………………..…….47

6.3. Main menu………………………………………………………………………………………………………….…………………….....49

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7. Troubleshooting and maintenance………………………………………………………………………………………..………….....66

7.1. Troubleshooting…………………………………………………………………………………….…………………………………….66

7.2. Maintenance..…………………………………………………………………………………………...………………………………….74

8. Uninstalling…………………………………………………………………………………….……………...………………………………….75

8.1. Steps for uninstalling the inverter…………………………………………………………………………………………………75

8.2. Packaging…………………………………………………………………………………………………………………………………….75

8.3. Storage…..………………………………………………………………………………………………………………….………………...75

8.4. Disposal…….………………………………………………………………………..…………………………………….…………………75

9. Technical specifications.……………………………..………………………………………………………………………..……………..76

10. Warranty……………..………………………………………………………………………………………………………………..……………78

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General instructions

This manual contains important safety instructions that must be followed during installation and
maintenance of the equipment.

Please keep these instructions!

This manual must be considered an integral part of the equipment and must always be available to everyone
who interacts with this equipment. The manual must always accompany the equipment, even when it is
transferred to another user or plant.

Copyright statement

The copyright of this manual belongs to Zucchetti Centro Sistemi S.p.A. No part of this manual may be copied
(including the software), reproduced or distributed in any form or by any means without the permission of
Zucchetti Centro Sistemi S.p.A. All rights reserved. ZCS reserves the right to final interpretation. This manual
is subject to change based on feedback from users, installers or customers.

Please check our website at http://www.zcsazzurro.com for the latest version.

Zucchetti Centro Sistemi

Via Lungarno 305/A

52028, Terranuova Bracciolini (AR)

[phone]

[e-mail]

http://www.zcscompany.com

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Danger: indicates a hazardous situation which, if not resolved or
avoided, could result in serious injury or death.

Danger

Warning: indicates a hazardous situation which, if not resolved or
avoided, could result in serious injury or death.

Warning

Caution: indicates a hazardous situation which, if not resolved or
avoided, could result in minor or moderate injury.

Caution

Attention: indicates a potentially hazardous situation which, if not
resolved or avoided, could result in damage to the system, or other
property.

Attention

Note: provides important tips on the correct and optimal operation
of the product.

Preface

General information

Please read this manual carefully before installation, operation or maintenance.
This manual contains important safety instructions that must be followed during installation and
maintenance of the system.

 Scope

This manual describes the assembly, installation, electrical connections, commissioning, maintenance and
troubleshooting of the following inverters:

50000TL / 60000TL / 70000TL

Keep this manual so that it is accessible at all times.

 Recipients

This manual is intended for qualified technical personnel (installers, technicians, electricians, technical
support personnel or anyone who is qualified and certified to operate a photovoltaic system), who are
responsible for installing and starting up the inverter in the photovoltaic energy system, and for operators of
the photovoltaic system.

 Symbols used

This manual provides information for safe operation and uses certain symbols to ensure the safety of
personnel and materials, and for efficient use of the equipment during normal operation.
It is important to understand this information in order to avoid injury and damage to property. Please take
note of the following symbols used in this manual.

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If you have problems or questions regarding the reading and
understanding of the following information, please contact
Zucchetti Centro Sistemi S.p.A. through the appropriate
channels.

Note

1. Preliminary safety instructions

General information in this chapter

Safety instructions

It mainly highlights the safety instructions to be followed during installation and use of the equipment.

Symbols and icons

Introduces the main safety symbols on the inverter.

1.1. Safety instructions

Before installing and using the equipment, make sure you read and understand the instructions in this
manual and familiarise yourself with the relative safety symbols shown in this chapter.

Depending on national and local requirements, permission must be obtained from your local provider before
connecting to the electrical grid, making sure that the connections are carried out by a qualified electrician.

Contact the nearest authorised service centre for any repairs or maintenance. Contact your distributor for
information on the nearest authorised service centre. DO NOT carry out repairs yourself, as this may result
in injury or damage.

Before installing and operating the equipment, the electrical circuit of the strings must be disconnected by
opening the string circuit breaker to interrupt the high-voltage DC of the photovoltaic system. Failure to do
so could result in serious injury.

Qualified personnel

Ensure that the operator has the necessary qualifications and training to operate the equipment. Personnel
responsible for the use and maintenance of the equipment must be qualified and capable of performing the
activities described, and must also have appropriate knowledge on how to correctly interpret the contents of
this manual. For safety reasons, this inverter can only be installed by a qualified electrician with the
necessary training and/or skills and knowledge. Zucchetti Centro Sistemi S.p.A. declines all responsibility for
damage to property or personal injury caused by incorrect use of the device.

Installation requirements

Install and start the inverter according to the following instructions. Place the inverter on a suitable load­bearing support with sufficient load capacity (such as walls or photovoltaic racks) and make sure that the
inverter is positioned vertically. Choose a suitable location for the installation of the electrical equipment.
Make sure there is sufficient space for heat dispersion and to accommodate future maintenance. Maintain
adequate ventilation and ensure that there is enough air circulation for cooling.

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Before connecting the mains power, be sure to disconnect the
photovoltaic modules by disconnecting all the DC switches of the
generator. When exposed to sunlight, the photovoltaic generator
produces a voltage that can be dangerous!

Danger

All installation operations must be carried out by a professional
electrician, who must:

 be prepared.
 carefully read this manual and understand its contents.

Warning

Before connecting the inverter to the grid, make sure that all the
necessary permits have been obtained from the local grid operator and
that all the electrical connections are made by a professional electrician.

Attention

Do not remove the information label or open the inverter.
Otherwise, ZCS will not provide any warranty or maintenance.

Note

Figure 1 – Do not lose or damage this manual

Transport requirements

If you have problems with the packaging that could damage the inverter or if you find any visible damage,
report it immediately to the transport company. If necessary, request assistance from an installer of
photovoltaic systems or from Zucchetti Centro Sistemi SpA. Transport of the equipment, especially by road,
must be carried out with vehicles suitable to protect the components (in particular, electronic parts) against
violent knocks, humidity, vibrations, etc.

Electrical connections

Please pay attention to the electrical regulations on accident prevention when dealing with photovoltaic
inverters.

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Contact with the electrical grid or the terminal of the equipment
may cause electrocution or fire!

•

Do not touch the terminal or the conductor connected to the
electrical grid.

•

Follow all the instructions and safety requirements relating to the
mains connection.

Danger

Some internal components reach very high temperatures when
the inverter is in operation. Wear protective gloves!

Attention

 Before carrying out any repairs, disconnect the inverter from the

mains network (AC side) and from the photovoltaic system (DC
side).

 After switching off the AC and DC switches, wait 5 minutes before

carrying out any repairs or maintenance on the inverter!

Danger

 The inverter should start working again after any faults have been

fixed. For any repairs, contact your local authorised service centre;

 Do not disassemble the internal components of the inverter

without permission. This will void the warranty. Zucchetti Centro
Sistemi S.p.A. shall not be responsible for any damage or loss
caused by these actions.

Attention

Operation

Maintenance and repair

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Pay attention to possible burns due to hot parts.
Only touch the screen or press the keys while the inverter is in
operation.

Caution

The PV strings should be connected to the ground in
accordance with the local regulations!

• To ensure the safety of the system and people, the inverter and

photovoltaic strings must be securely connected to the ground.

Attention

Ensure the correct DC input voltage; which must be below the
maximum allowable DC voltage. Overvoltage can cause
permanent damage to the inverter or other faults which are
not covered by the warranty!

Warning

Residual voltage may be present on the inverter! Before opening the
inverter, wait 5 minutes to ensure that the capacitors are completely
discharged.

Be careful of high voltage

Be careful of high temperatures

Complies with the European Standards (CE)

Grounding point

1.2. Symbols and icons

Safety symbols

Symbols on the inverter

Some safety symbols are located on the inverter. Read and understand the contents of the symbols before
installing the inverter.

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Read this manual before installing the inverter.

Indication of the allowable temperature range

Degree of protection of the equipment according to the IEC 70-1
standard (EN 60529 June 1997).

Positive pole and negative pole of the input voltage (DC).

2. Product features

General information in this chapter
Product overview

The field of use and overall dimensions of the 50K-70K TL inverters are indicated in this section.

Description of functions

It describes how the 50K-70K TL inverters and their internal operating modules work.

Efficiency curve

It describes the efficiency curves of the inverter.

2.1. Product overview

Field of use

The 50K-70K TL inverters are grid-connected photovoltaic inverters equipped with a dual-channel MPPT, capable
of converting the direct current generated by the photovoltaic strings into three-phase sine wave alternating
current and feeding the energy to the public electricity grid. An AC circuit breaker (see chapter 4.4) and DC circuit
breaker must be used as disconnecting devices and must always be easily accessible.

Figure 2 – Grid-connected photovoltaic system

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The 50K-70K TL inverters can only be used with photovoltaic modules that do not require one of the poles
to be grounded. The operating current and voltage during normal operation must not exceed the limits
indicated in the technical specifications. Only photovoltaic modules can be connected to the input of the
inverter (do not connect batteries or other power supply sources).

Intended networks

The 50K-70K TL inverters are compatible with network configurations TN-S, TN-C, TN-C-S, TT, IT. For a TT
electrical grid, the voltage between neutral and ground should be less than 30V. The figure below shows the
diagrams of these grids.

Figure 3 – Wiring diagrams of grid types on which the 50K-70K TL inverter can be installed

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Inverter components

 Inverter models of the 50K-70K TL family are divided into three sizes according to their

maximum output power (50 kW, 60 kW, 70 kW).

 Inverters with the same output power differ according to the characteristics of the wiring box.

Wiring box 2 can have two configurations, indicated by the letters SX (where X=4.5).

Figure 4 – Bottom view of the inverter

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S4

1. Communication board

2. AC output connectors

S5

1. AC surge arrester (II)

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 The inverter model must be chosen by a qualified technician who knows the installation conditions, the

devices that will be installed outdoors and the possible integration with existing systems.

 Optional components of the inverter should be chosen by a qualified technician who is familiar with the

installation conditions.

 Identification of the type of inverter.

 Overall dimensions: H x W x D = 737 mm x 713 mm x 297 mm

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 Labels on the inverter

2.2. Description of functions

Figure 5 – Front, side and back view of the inverter and bracket

Figure 6 – Do not remove the label on the side of the inverter

The DC voltage generated by the PV modules is filtered through the input board before entering the power
board. The input board also has the function of detecting the insulation impedance and the DC input
voltage/current. The power board converts the DC power into AC power. The current converted in AC is
filtered through the output board and is then fed into the grid. The output board also has the function of
measuring the grid and GFCI voltage/current and acts as an output insulation relay. The control board
provides the auxiliary power supply, controls the operating status of the inverter and shows it on the
display. The display also shows the error codes when the inverter is not functioning properly. At the same
time, the control board can activate the protection relay in order to protect the internal components.

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Operating principles

 The control board of the strings measures the input current and voltage, analyses the functioning

state of each PV string, and if anomalies are found on the strings, alerts the user to perform the
relative control and maintenance operations.

 The DC switch disconnects the internal circuits from the DC input for maintenance purposes.
 DC surge arresters (category III, category II added on models S4 and S5) provide overvoltage

discharge on the DC side to protect the inverter’s internal circuits against excessive DC voltages.

 Electromagnetic and filters (EMI) at the in-feed and out-feed allow filtering the electromagnetic

emissions of the inverters to ensure that they meet the electromagnetic compatibility requirements.

 The input board measures the insulation impedance, voltage and current of the various strings; it

also manages the algorithm of the maximum power point algorithm (MPPT) in order to maximise the
power generated by the photovoltaic strings.

 The DC-AC conversion circuit converts the DC power into AC power and feeds it into the grid, in

compliance with the local requirements.

 The insulation relay disconnects the inverter from the electrical network when the grid or the

inverter fails.

 The LC filter filters the over-frequency components coming from the AC output of the inverters to

ensure that the energy fed into the grid meets the quality requirements of the grid itself.

 AC surge arresters (category III, category II added on S5 models) provide overvoltage discharge to

the AC side in order to protect the internal circuits of the inverters against excessive AC voltages.

 The communication board allows the inverter to communicate via RS485 and Wi-Fi (optional); the

user can access all operating data via a web portal from a PC and via APP.

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Figure 7 – Block diagram of the 50K-70K TL inverters

Inverter functions

A. Configurable relay

The inverter has a configurable switching relay that can be used in various operating conditions (set in the
menu). For example, it can close normally open contacts when an alarm occurs.

B. Energy management unit

B.1 Remote power on/off

This control can be used to activate/deactivate the inverter via an external (remote) control.

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B.2 Feeding reactive power into the grid

The inverter is capable of generating reactive power and can then feed it into the grid by setting the Power
Factor. The feed-in management can be controlled directly by the network operator via a dedicated RS485
serial interface.

B.3 Limiting the active power fed into the grid

If properly set, the inverter can limit the amount of active power fed into the grid at the desired value
(expressed as a percentage). To achieve this limitation, it is necessary to use an external device (Anti­Reverse Power Controller) not supplied with the inverter.

B.4 Automatic power reduction when grid frequency exceeds the limit

When the grid frequency exceeds the limit set, the inverter reduces the power in order to ensure the
stability of the grid.

B.5 Power reduction due to environmental conditions, input and output voltage

The power reduction value and temperature of the inverter at which it occurs depends on the ambient
temperature and on many operating parameters, such as: input voltage, grid voltage and power available
from the photovoltaic field. The inverter can therefore reduce the power at certain times of the day and
depending on the value of these parameters.

C. Data transmission

The inverter (or a group of inverters) can be monitored remotely via an advanced communication system
based on a RS485 interface or via Wi-Fi.

D. Software update

A microSD card is used to update the firmware.

E. Monitoring input strings
The inverter monitors and displays the input voltage and current of each string. It also controls the status of
the strings and in the event of a fault generates an alarm in the error list (visible from the display).

F. Overvoltage arrester monitoring (only for S4 and S5 versions)

The inverter monitors the status of the overvoltage arresters (both AC and DC), and in the event of a fault
generates an alarm in the error list (visible from the display).

2.3. Module protection

A. Anti-islanding

The inverter is equipped with a protection system that automatically shuts down the system during power
outages. This so-called “anti-islanding” system protects electrical workers when they are trying to repair lines on
the grid according to the applicable national laws and regulations.

B. RCMU

The inverters are equipped with a redundancy on the reading of the ground leakage current, on both the direct
and alternating current sides. The ground leakage current is measured simultaneously and independently by two
different processors: it is sufficient for one of the two to detect a fault in order to trigger the protection, resulting
in separation from the grid and shutdown of the operation.

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C. Grid monitoring

Continuous monitoring of the grid voltage to ensure that the voltage and frequency values stay within the
operating limits.

D. Internal protection of the inverter device

The inverter has all kinds of internal protections to protect the device and internal components when abnormal
situations occur on the grid or DC input line.

E. Ground fault protection

The inverter must be used with photovoltaic modules connected with “floating” connections, i.e. with positive

and negative terminals that are not grounded. An advanced ground fault protection circuit continuously monitors
the ground connection and disconnects the inverter when a ground fault is detected. The ground fault condition is
indicated by a red light on the front panel.

2.4. Efficiency and derating curves

Efficiency curve for an Azzurro ZCS 50K-70K TL inverter

Figure 1 – Efficiency curve for an Azzurro ZCS 50K-70 TL inverter

Input power (V) derating curve for an Azzurro ZCS 50K-70K TL inverter

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Figure 9 – Input power derating curve for an Azzurro ZCS 50K-70K TL inverter

Output power (V) derating curve for an Azzurro ZCS 50K-70K TL inverter

Figure 10 – Output power derating curve for an Azzurro ZCS 50K-70 TL inverter

3. Installation

General information in this chapter

This chapter describes how to install the 50K - 70K TL inverter.

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 DO NOT install the 50K-70K TL inverter near flammable materials.
 DO NOT install the 50K-70K TL inverter in an area where flammable or explosive

materials are stored.

Danger

The housing and heat sink may become very hot while the inverter is running,
DO NOT install the inverter in places where they may be touched inadvertently.

Warning

 Consider the weight of the inverter when handling and transporting the inverter.
 Choose an appropriate mounting position and surface.
 Assign at least two people to install the inverter.

Attention

Installation notes:

3.1. Installation procedure

This section describes the procedure for installing the 50K-70K TL inverter

3.2. Checks before installation

This section describes the checks to carry out on the outer packaging, on the inverter and its
components.

3.3. Installation tools

This section describes the tools needed to install the inverter and to make the electrical connections

3.4. Installation position

This section describes the characteristics of the installation site of the inverter.

3.5. Moving the inverter

This section describes how to move the inverter to the installation position

3.6. Installing the inverter
This section describes the steps for installing the inverter on the wall

3.1. Installation procedure

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1 Photovoltaic inverter

1 mounting bracket

10 + input terminals

for 50K TL

12 + input terminals

for 60K TL & 70K TL

10 - input terminals

for 50K TL

12 - input terminals

for 60K TL & 70K TL

10 Metal terminals for +

DC power cables

(50K TL)

12 Metal terminals for +

DC power cables

(60K TL & 70K TL)

10 Metal terminals for -

DC power cables

(50K TL)

12 Metal terminals for -

DC power cables

(60K TL & 70K TL)

2 M6 hexagonal screws

1 M6 flat washer

Figure 11 – Installation steps

3.2. Checks before installation

Checking the outer packaging

The packaging materials and components may be damaged during transportation. Therefore, please check
the materials of the outer packaging before installing the inverter. Check the surface of the box for external
damage such as holes or tears. If any kind of damage is found, do not open the box containing the inverter
and contact the supplier and transport company as soon as possible.

It is recommended to remove the packaged materials from the box 24 hours before installing the inverter.

Checking the product

After removing the inverter from its packaging, check that the product is intact and complete. If any damage
is found or components are missing, contact the supplier and transport company.

Contents of the packaging

Carefully check the contents of the packaging before installation, making sure that no element inside the
packaging is missing or damaged.

The package will contain the following components:

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8 M8x80 expansion plugs

1 user manual

1 warranty

1 certificate

10 A Stoppers for 50K TL
12 A Stoppers for 60K TL

& 70K TL

10 B Stoppers for 50K TL
12 B Stoppers for 60K TL

& 70K TL

No.

Tool

Function

1

Drill

Recommended drill bit: 8 mm

To drill holes in the wall for fixing

the bracket

2 Screwdriver (flat and star)

To screw and unscrew the screws

for the various connections (AC

power cables, removal of AC

connectors) 3

Wire stripper

To prepare the cables for wiring

4

Adjustable spanner (opening

greater than 32 mm)

To tighten the bolts

5 6 mm Allen key

To screw the inverter to the wall­mounting bracket and to open the

front cover of the inverter

6 Socket wrench

To screw the bolt for the grounding

connection

3.3. Installation tools

The following tools are required for installation of the inverter and electrical connections; therefore, they
must be prepared before installation.

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7 RJ45 crimping tool

To crimp the RJ45 connectors for

the communication cables

8 Rubber hammer

To insert the expansion plugs into

the wall holes

9 MC4 removal tool

To remove the DC connectors from

the inverter

10 Diagonal pliers

To cut and tighten the cable ends

11 Wire stripping tool

To remove the outer sheath of the

wires

12 RJ45 terminal

RJ45 terminal

13 Cable cutter

To cut the power cables

14 Crimping tool

To crimp the power cables

15 Multi-meter

To check the voltage and current

values

16 Marking pen

To mark the wall for better fixing

precision

17 Measuring tape

To measure distances

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18

Level

To make sure the bracket is level

19 ESD gloves

Protective clothing

20 Safety goggles

Protective clothing

21 Protection mask

Protective clothing

3.4. Installation position

Choose an appropriate installation location for the inverter.

Follow the requirements below to determine the installation position.

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Figure 12 – Requirements for installing a single inverter

Figure 13 – Requirements for installing multiple inverters

Note: For safety reasons, ZCS Spa and/or its partners may not carry out any technical repairs or

maintenance work, or move the inverter from and to the ground if it is installed at a height of more than 180
cm from the ground.
Inverters installed at higher heights must be moved to the ground before they can be repaired or serviced.

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 To prevent damage and personal injury, hold the inverter firmly when moving,

as it is a heavy piece of equipment.

 Do not position the inverter with the input/output terminals in contact with

other surfaces, as these are not designed to support the weight of the inverter.
Always position the inverter horizontally.

 When placing the inverter on the floor, make sure to place a support under the

unit to protect its front door.

Attention

3.5. Moving the 50K-70K TL inverter

This section describes how to move the inverter correctly

1) When opening the packaging, insert your hands into the slots on both sides of the inverter and take a

hold of it as shown in Figures 14 and 15. Two people are needed to carry out this operation in order to
ensure the safety of people and correct handling of the inverter.

Figure 14 – Removing the polystyrene protections

Figure 15 – Removing the inverter from its packaging

2) Lift the inverter from its packing box and move it to the installation position.

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3.6. Installing the 50K-70K TL inverter

1) Correctly position the mounting bracket on the wall using a level to ensure that it is straight; mark the

eight holes using a suitable marker pen. Keeping the hammer drill perpendicular to the wall and
avoiding any sudden movements when drilling, drill the eight holes at the points marked on the wall
using a 8 mm drill bit. In case of errors during drilling, it is necessary to reposition the holes.

2) Insert the plugs horizontally into the holes made, paying attention to the force and depth with which

they are inserted (make sure the plug completely enters the hole).

3) Align the mounting bracket with the position of the holes and fix it to the wall using the most suitable

screws and flat washers, tightening them properly.

4) Place the back hook of the inverter on the mounting bracket

5) Secure the inverter to the mounting bracket with the M6 bolt to ensure stability.

6) (OPTIONAL) Depending on the customer’s requirements, the inverter can be locked to the mounting

bracket with a safety lock (not supplied with the kit).

Figure 16 - Steps for mounting the inverter on the wall

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The inverter must be installed and serviced by professional technicians or
electricians.

Attention

The PV modules generate electricity when exposed to sunlight, which can
result in risk of electric shock. Before connecting the DC input power cord,
disconnect the strings via the appropriate circuit breakers.

Danger

The maximum open-circuit voltage of the photovoltaic string must be less than
1000 V.
The 50K-70K TL series has three Maximum Power Point Trackers (MPPT); all
the photovoltaic modules connected in series to the same MPPT must be of the
same model and brand so as to have the same rated electrical characteristics
(Isc, Voc, Im, Vm, Pm and temperature coefficients); they must have the same
number of photovoltaic modules connected in series and must be positioned
in the same orientation (solar azimuth and inclination angle).

Note

4. Electrical connections

General information in this chapter

This chapter describes the electrical connections of the 50K-70K TL inverter. Carefully read this section
before connecting the cables.

NOTE: Before making any electrical connections, make sure that the DC and AC circuit breakers are open.

Remember that the accumulated electrical charge remains in the inverter capacitor after the DC and AC
circuit breakers have been switched off. Therefore, it is necessary to wait at least 5 minutes to allow the
capacitor to discharge completely.

4.1. Electrical connections

Describes the procedure for making the electrical connections.

4.2. Connecting the PNGD cables (grounding)

Describes the connection of the ground cables (PGND) for the grounding of the inverter

4.3 Connecting the DC input power cables

Describes the connection of the photovoltaic strings to the inverter using the DC power cables.

4.4. Connecting the AC output power cables

Describes the connection of the inverter to the AC grid using the AC power cables (after the
distributor has granted permission for the grid connection).

4.5. Connecting the communication cables

Describes the function of the RS485 ports and the Wi-Fi adapter and the relative connection
methods.

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The inverter does not have a transformer, therefore the positive and negative
poles of the photovoltaic string does NOT need to be grounded. Otherwise, the
inverter may fail. All non-current-carrying metal parts (such as the PV module
frame, PV rack, housing of the combiner box, and housing of the inverter) in the
PV power system must be connected to the ground.

Attention

4.1. Electrical connections

Figure 17 – Steps for connecting the cables

4.2. Connecting the PNGD cable

Connect the 50K-70K TL inverter to the ground electrode using ground protection cables (PGND).

Note: Connect the PGND cable before connecting the AC, DC power and communication cables.

For systems with one inverter, connect the PGND cable to the ground. For systems with multiple inverters,
connect the PGND cables of each inverter to the ground electrode using equipotential connections.

If the installation place is near the ground, connect the PGND cable to the ground before installing the
inverter on the wall.

Figure 18 – Connecting the ground terminal

Prerequisites:

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Prepare the PGND cables to be connected (outdoor power cables with a cross-section of 8 mm2 are
recommended for grounding purposes); it is recommended to use yellow-green cables for better
identification.

Procedure:

1) Remove an adequate length of the external insulation layer using a wire stripper, as shown in Figure 18.

Note: L2 is approximately 2-3 mm longer than L1

Figure 19 – Preparing the ground cable (1)

2) Insert the exposed wires in the OT terminal and crimp them using a crimping tool, as shown in

Figure 19.

Note 1: L3 is the length between the insulation layer of the ground cable and the crimped part. L4 is the

distance between the crimped part and the conductor wires protruding from the crimped part.

Note 2: The cavity formed after the conductor has been crimped must completely wrap the conductor

wires. The core of the wire must be in close contact with the terminal.

Figure 20 – Preparing the ground cable (2)

3) Install the crimped OT terminal and flat washer using the M6 screw in the hole located on the

inverter heatsink, as shown in the figure; tighten the screw to a torque of 5 Nm using an Allen key.

Note: To ensure the anti-corrosion performances of the ground terminals, apply silica gel on them after

connecting the ground cable.

4.3. Connecting the DC input power cables

Connect the 50K-70K TL inverter to the photovoltaic strings using DC input power cables.
Select the input mode: the 50K-70K TL inverter has three MPPTs, which can function either independently
or in parallel, depending on how the system was designed. The user can choose the appropriate MPPT
operating mode.

Independent mode (default):

If the strings are independent (e.g. installed on three separate flaps), the input mode must be set to
“independent mode.”

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Model

50000 TL

60000 TL

70000 TL

Voltage range per MPPT

250-960 V CC

250-960 V CC

250-960 V CC

Maximum input voltage

1000 V CC

 Check the polarity of the PV string to ensure the correct connection of the

cables to the string.

 Do not connect the positive or negative pole of the PV string to the

ground.

Note

Make sure that the following information is observed. Otherwise, there is a
risk of fire.

 The modules connected in series in each string must have the same

specifications.

 The open-circuit voltage for each string must be less than or equal to 1000 V

DC.

 The short circuit current for each input must be less than or equal to 18 A DC
 The output power for each PV string must be less than or equal to the

maximum input power allowable for 50-70K TL inverters.

 The positive and negative terminals of the PV strings must be connected

respectively to the positive and negative inputs of the terminal block.

Attention

The setting method is described in section 6.3.

Parallel mode:

If the strings are connected in parallel, the input mode must be set to “parallel mode.”
The setting method is described in section 6.3.

Note

Depending on the type of inverter, select the appropriate accessories (cables, fuse holder, fuse, switch, etc).
The open-circuit voltage of the photovoltaic system must be lower than the maximum allowable DC input
voltage of the inverter.

The positive and negative poles of the panels on the inverter must be connected separately. The power cable
must be suitable for photovoltaic applications.

Note

All the MMPT inputs of the inverter must be populated if parallel input mode is set. If the strings are
arranged in parallel, it is recommended to execute a parallel node in order to divide the input currents from
the PV array and populate all the MPPT inputs of the inverter. If the string arrangement is independent,
simply connect the two strings to the MPPTs of the inverter.

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 Before connecting the power supply, be sure to disconnect the generator’s DC

switch. When exposed to sunlight, the photovoltaic generator produces a
voltage that can be dangerous!

 Before connecting the power supply, make sure that the voltage of the DC cables

is within the allowable operating range, below 60 V DC, and that the DC circuit
breaker switch is open. Otherwise, the high voltage may cause serious injury
and damage.



Danger

 If the 50-70K TL inverter is connected directly to the grid, make sure that

the PV strings are not grounded.

 If the DC voltage has a non-zero value between the positive terminal of the

PV strings and the ground, the PV strings are subject to insulation faults.
Fix the fault before connecting the cables.

 During the installation of the PV string and inverter, the positive and

negative terminals of the PV strings must be grounded if the power supply
cables are not properly installed or extended. In this case, a DC short
circuit may occur and the inverter may be damaged.

 If the PV string is to be grounded, install a four-wire three-phase isolation

transformer on the output side and disable the ISO detection function;
refer to Chapter 6.3 “Insulation Resistance.” If an isolation transformer is
not installed, the inverter may be damaged.

Note

Cross-sectional area (mm2)

Outer diameter of cable (mm)

Range

Recommended value

4.0-6.0

4.0 4. 5 - 7. 8

Context

Table 1 – Recommended specifications for DC input cables

The DC input connectors (MC4) are classified into positive and negative connectors, as shown in the figures
below.

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Figure 20 – Positive (1) and Negative (2) MC4 connectors

Note

The positive and negative metal terminals are packed together with the positive and negative connectors
respectively. Separate the positive and negative metal terminals after unpacking the inverter so as to avoid
confusing the polarities.

Procedure

1) Remove the cable glands from the positive and negative connectors.

2) Use a wire stripper to remove an appropriate length of the insulation layer from the positive and

negative power cables, as shown in the figure.

Figure 22 – Connecting the DC input power cables (1)

Note: L2 is approximately 2 or 3 mm longer than L1.

1) Insert the positive and negative power cables into the corresponding cable glands.

2) Insert the stripped positive and negative power cables into the positive and negative metal terminals

respectively, and crimp them using a suitable tool. Make sure that the cables are secured so that they
cannot be pulled out with a force of less than 400 N, as shown in Figure 23.

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Before removing the positive and negative connectors, make sure that the
inverter’s circuit breaker is switched off. If not, the direct current may cause an
electric arc that could result in a fire

Warning

Figure 23 – Connecting the DC input power cables (2)

3) Insert the crimped power cables into the corresponding seats until you hear a “click” sound. At that

point, the power cables will be snapped into place.

4) Replace the cable glands on the positive and negative connectors and rotate them against the

insulation covers.

5) Insert the positive and negative connectors into the corresponding DC input terminals of the inverter

until you hear a “click” sound, as shown in the figure.

Figure 24 – Connecting the DC input power cables (3)

Note: Insert the caps into the unused DC connectors.

Removal procedure

To remove the positive and negative connectors from the inverter, insert a removal tool into the bayonet
coupling and press the tool with adequate force, as shown in the figure below.

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

Do not use the same AC circuit breaker for multiple inverters.



Do not install loads between the inverter and the AC circuit breaker.



The switch used as a disconnection device should always be operational and
ready to operate.



In Italy, each grid-connected photovoltaic system with a power output of more
than 11.08 kW must be equipped with an external interface device (SPI)

Warning

Type

50000 TL

60000 TL

70000 TL

Cable (mm2)

>20

>20

>20

Switch

100A

160A

160A

Figure 25 – Removing the DC connector

4.4. Connecting the AC output power cables

Connect the inverter to the AC power distribution network or power grid using AC power cables.

Context

All the AC power cables used for the inverter must be 5-pole outdoor cables. For easier installation, use
flexible cables. The table shows the recommended specifications for cables and circuit breakers.

Table 2 – Recommended specifications for AC output cables

Note: For safety reasons, it is important to use correctly sized cables, otherwise the current may cause

excessive heating or overloading, which could result in a fire.

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Cross-section of the cable

(mm2)

Maximum length (m)

50000 TL

60000 TL

70000 TL

20

30

27

27

26

49

44

44

Figure 26 – Do not connect loads between the inverter and circuit breaker

Multi-core copper cables

The cross-section of the power line must be sized in order to prevent unwanted disconnections
of the inverter from the grid due to high impedance of the cable connecting the inverter to the
point of supply. In addition, the AC cable must be correctly sized to ensure that the loss of power
on the cable is less than 1% of the rated power and to ensure proper functioning of the anti­islanding protection. The cable length from the inverter to the grid should not exceed 150
meters.

The figure below shows the relationship between the power loss in the cable, its length and the

cross-section area.

The 50-70K TL inverters are three-phase output inverters that fully comply with the local grid connection
requirements and safety standards.

The inverters are equipped with AC output connectors with IP66 protection suitable for photovoltaic use;
customers must provide their own AC output cable connections.

Cable connection procedure

1) Open the front cover on the bottom of the inverter by removing the six grub screws.

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Figure 27 – Connecting the AC output cables (1)

2) Identify the suitable cable section as shown in the table and remove an appropriate length of the

protective sheath, as shown in the figure. Then insert the AC output cable through the waterproof cable
gland.

Figure 28– Connecting the AC output cables (2)

3) Connect the AC power cable according to the following criteria and as shown in the figure:

 Connect the yellow-green (ground) cable to the terminal labelled “PE”, tighten the wire using a

screwdriver;

 Connect the phase R cable to the terminal labelled “R”, tighten the wire using a screwdriver;
 Connect the phase S cable to the terminal labelled “S”, tighten the wire using a screwdriver;
 Connect the phase T cable to the terminal labelled “T”, tighten the wire using a screwdriver;
 Connect the blue (neutral) cable to the terminal labelled “N”, tighten the wire using a screwdriver.

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Figure 29– Connecting the AC output cables (3)

4) Secure the clamping cable gland by turning it clockwise; make sure that all the wires are securely

connected

4.5. Connecting the communication cables

The 50K-70L TL inverters have two communication interfaces: the RS485 interface and Wi-Fi interface (see
figure below).

Figure 30 – Bottom view of the 50-70K TL inverter

Connecting the RS485 communication cables

When using the RS485 communication line, the inverter must be connected to the communication
equipment (for example, to a data acquisition device or PC terminal).

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Number

Colour

Function

1

White and orange

RS485 B-

2

Orange

RS485 A-

3

White and green

RS485 A-

4

Blue

RS485 A-

5

White and blue

RS485 B-

6

Green

RS485 B-

7

White and brown

NC 8 Brown

NC

For communication via the RS485 line, it is recommended to use AWG 24 shielded outdoor
network cables with an internal resistance of less than or equal to 1.5 ohm/10m and external
diameter between 4.5 mm and 7.5 mm.

The RJ45 waterproof connector is made up of six parts: plug, screw nut, seals, housing, sealing plug
and cable screw nut (see figure below).

Figure 31 – Connector for communication via RS485 port

When passing the communication cables, make sure that they are separated from the power
cables and away from sources of interference, so as to prevent any interruptions in the
communication.

Procedure

1) Remove an appropriate length of the outer insulation layer of the shielded network cable using a

wire stripper.

2) Open the front cover located on the bottom of the inverter and insert the network cable into the

cable gland, passing it through the external tightening nut, the seal and internal tightening nut.

3) Connect the stripped network cable to the respective pins on the plug, as shown below.

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Figure 32 – Assembling the communication connector

4) Crimp the plug using the RJ45 crimping tool.

5) Insert the plug into the RS485 port on the inverter.

6) Insert the cable seal in the lodging and tighten the nut.

Figure 33 – Assembling the communication connector

Removal procedure

Remove the RJ45 connector from the inverter by removing the plug. Then press the clip on the RJ45
connector and pull out the RJ45 connector.

Communication via Wi-Fi connection

To allow the inverter to communicate via Wi-Fi, it is necessary to equip the machine with a special
Wi-Fi adapter.

To use the Wi-Fi Communication, connect the inverter to a data acquisition device such as a
router, Wi-Fi modem or Wi-Fi network extender.

Procedure

1) Use a screwdriver to remove the slot cover of the Wi-Fi adapter, as shown in the figure.

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2) Connect the external Wi-Fi module by inserting it into the appropriate slot.

3) Secure the external Wi-Fi module using the two screws supplied.

Note: follow the appropriate procedure to configure the external Wi-Fi adapter.

Description of the communication ports

This section describes the functions of the RS485 and Wi-Fi ports.

RS485

The RS485 port allows transferring information regarding the power generated, the alarms and operating
status of the inverter to the local data acquisition device, and to then upload this information to a server.

Figure 34 – Communication systems: USB-RS485 converter and data logger terminal

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SWT2_1

SWT2_2

Status

ON

OFF

Connected

OFF

OFF

Not connected

Note: in the case of a single inverter connected via RS485 or in the case of the last inverter in a daisy-chain
of multiple inverters connected via RS485, configure the insulation resistance using the SWT2 switches,
following the indications shown in the table below (O-OFF, 1-ON) and in the figure below.

If the system consists of only one inverter, use a communication cable with waterproof RJ45 cables, select
one of the two RS485 ports and set the RS485 address according to what is reported in section 6.3.

If the system consists of multiple inverters, connect each of them in a daisy chain using a RS485
communication cable. Then set the RS485 address according to what is reported in section 6.3 (see figure
below).

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Note: It should be remembered that it is always necessary to provide technical support with the serial
number of the inverter and the Wi-Fi adapter to allow remote monitoring via the application or website.
This information can be sent by email to [e-mail].

WI-FI/GPRS

Through the interface it is possible to transfer information regarding the power generated, the alarms and
operating status of the inverter to a local data acquisition device, such as a router, Wi-Fi modem or wi-fi
network extender, and to then upload this information to a server.

Note: it is necessary to provide Zucchetti Centro Sistemi S.p.a. with the serial number in order to activate

the inverter’s remote monitoring system. This can be sent to www.zcsazzurrowebportal.com.

Figure 35 – Connecting an inverter with Wi-Fi

Notes:

Note 1: The RS485 communication cable must not be longer than 1000 m.

Note 2: The network cable for communicating with the Wi-Fi router must not be longer than 1000 m.

Note 3: When multiple inverters are connected via RS485 cables, configure the Modbus address to

differentiate between these inverters. Refer to section 6.3 for setting the Modbus address.

Note 4: If multiple inverters are connected to the system’s monitoring device via a single RS485/RS232

converter or to the same S-WE01S data logger, a maximum of 31 inverters can be connected in a daisy chain.

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The 50K-70K TL inverters have a multi-function relay whose output can be configured. The communication
terminal is found on the communication board, as shown in the figure. Connect the CNT10 input, as shown
below.

This can be connected as normally-open (e.g. connecting the NO contact and the COM contact), or it can be
configured as normally-closed (e.g. connecting the NC contact and the COM contact).

The relay has 4 different control functions. For more details, refer to the settings menu directly on the LCD
display and to this manual under the section that describes the relay functions.

Connecting the relay cable
Procedure

1) Prepare the appropriate cable. Remove the insulating sheath, as shown in the figure below; then

route the cable through the waterproof nut.

2) Insert the sealing cap and tighten the cable.

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3) Connect the stripped cable into the appropriate terminal of the terminal block.

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Make sure that the DC and AC voltages are within the range
permitted by the inverter.

Attention

5. Commissioning the inverter

5.1. Safety inspection before commissioning

 Photovoltaic strings

Before turning on the inverter, examine the photovoltaic string. Check the open-circuit voltage of
each photovoltaic panel and compare it with the data in the technical datasheet.

- Make sure that the open-circuit voltage of each PV string corresponds to the technical data.

- Make sure that the positive and negative poles are correct.

 DC connection

Make sure that the DC switch of the inverter is off. Use the multi-meter to check the voltage and

current on the DC side; check the DC cable, make sure that the positive and negative poles are not
inverted, and are consistent with the positive and negative poles of the photovoltaic string;
otherwise, the inverter may suffer irreparable damage. Compare the voltage of each string connected
to the same MPPT; if the difference is more than 3%, the PV string may be damaged. The maximum
DC voltage (if the minimum operating temperature allowable is reached) should be less than 1000 V.
Make sure that all the photovoltaic strings are securely connected to the input of the inverter.

 AC connection

Make sure that the AC switch of the inverter is off. Check that the phases of the inverter are correctly
connected to the grid (R, S, T, N, PE). Check that the type of AC grid in which the inverter is installed
is correct (TN-C, TN-S, TT). Check that the voltage of each phase is within the correct range. If
possible, measure the THD; if there is too much distortion, the inverter may not function properly.

 Installing the front cover and clamping screws

5.2. Starting the inverter

1) Turn ON the DC switch located on the field panel and on the photovoltaic inverter (if present); wait

for the screen to turn on.

2) Turn ON the AC switch installed on the wall.

When the photovoltaic string generates enough direct current, the inverter will start automatically.
The word “normal” shown on the screen indicates the correct functioning of the inverter.

3) Set the correct country code (refer to chapter 6.3 of this manual).

Note: Different grid operators in different countries require different specifications regarding the grid
connections of PV inverters. Therefore, it is very important to select the correct country code according to
the local requirements.

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Bac

If in doubt, consult the system engineer or a qualified electrician.

Zucchetti Centro Sistemi S.p.A. shall not be held responsible for any consequences resulting from the
incorrect selection of the country code.

If the inverter indicates the presence of any faults, refer to chapter 7.1 of this manual or contact the
Zucchetti Centro Sistemi S.p.A. technical support.

6. Operating interface

General information in this chapter

This section describes the display and its operation, as well as the buttons and LED indicators of 50-70K TL
inverters.

6.1. Operating panel and display

Buttons and LED indicators

Figure 36 – LCD display with buttons and LED indicators

Main buttons:

 Menu/Back: to go back or enter the main menu.
 Up: to go up or increase the value by 1.
 Down: to go down or decrease the value by 1.
 OK/Enter: to confirm the selection and enter the menu

Indicator lights:

 Status light (GREEN)

o Flashing: wait or status check
o Steady: normal operation
o Off: temporary or permanent error

 Warning light (RED)

o Flashing: fan error

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o Steady: temporary or permanent error
o Off: normal operation

 GFCI automatic differential circuit breaker indicating light (RED)

o Steady: GFCI fault indication (ID12: automatic differential circuit breaker fault or ID20:

device fault).

o Off: GFCI in operation (automatic differential circuit breaker) normal

6.2. Main interface

The main LCD interface is used to display the inverter states, information, settings, etc.

Figure 37 – Main interface of the LCD display

The LCD screen displays the power output of the inverter, the input information coming from the PV system,
information relating to errors, etc.

Figure 38 – Indicators in the main interface

A1 – Modbus communication address
A2 – RS485 Communication
A3 – Steady light for active RS485 communication
A4 – Wi-Fi Communication
A5 – Flashing light to indicate over-frequency and power derating status. Steady light to indicate remote
control
A6 – Indicates the energy produced today
A7 – Indicates the energy produced in total
A8 – Steady light to indicate high temperature of the inverter
A9 – Output power in real time

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A10 - The MPPT SCAN function is on
A11 – Steady light when the input voltage is higher than 160V
A12 – Input channel and input voltage in real time
A13 – Input voltage and current of string 1 and 2, shown alternatively every three seconds
A14 – Light is on when the state is normal
A15 - R/S/T phase voltage, shown alternatively every three seconds
A16 – R/S/T phase current and frequency, shown alternatively every three seconds
A17 – Energy produced from 3:00am to 9:00pm today

When the power is turned on, ZCS INNOVATION…. appears on the screen, as shown in the figure below

when the control board is correctly connected to the communication board, the LCD screen will display the
current status of the inverter, as shown in the figure below.

Inverter states include:

Wait: inverter is waiting to Check the state at the end of the reconnection time. In this state, the PV voltage

must be higher than 250 V, the grid voltage value must be between the minimum and maximum permissible
limits, as should the other grid parameters; otherwise, the inverter will go into an error state.

Check: inverter is checking the insulation resistance, relays and other safety requirements. It also runs a self­test to ensure that the software and hardware of the inverter are functional. The inverter switches to the
error state or permanent error state if an errors occur.

Normal: The inverter is functioning normally and is feeding power into the grid; the inverter will go into a
permanent error state if any faults are found.

Error: inverter has encountered a permanent error. If the error disappears on its own, the inverter will
return to its normal state. If the error continues, please check the inverter according to the error code.

Permanent: inverter has encountered a permanent error. The installer must debug this type of error
according to the code found in order to bring the inverter back to its proper functioning.

If the control board and communication board are not connected, the interface of the LCD display appears as
shown in the figure below.

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6.3. Main menu

Press the “Menu/Back” button in the main interface screen to enter the main menu, which will appear as

follows:

(A) Press the “OK” key to enter the “Settings” menu.

The “Settings” menu contains the following sub-menu:

 Date and time

Select “1. Date and time” and press “OK” to enter the menu for setting the date/time. First set the date and
then the time using the “Up” and “Down” keys, then press “OK” to move to the next digit and confirm. The

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Code

Country

Code

Country

Code

Country

00

Germany VDE AR-

N4105

12

Poland

24

Cyprus

01

CEI 0-21 Internal

13

Germany BDEW

25

India

02

Australia

14

Germany VDE

0126

26

Philippines

03

Spain RD1699

15

Italy CEI 0-16

27

New Zealand

04

Turkey

16

UK-G83

28

Brazil

05

Denmark

17

Greece - islands

29

Slovakia VSD

06

Greece - mainland

18

EU EN50438

30

Slovakia SSE

07

Netherlands

19

IEC EN61727

31

Slovakia ZSD

date and time are expressed in the format: 20YY – MM - DD HH:MM:SS.

The display will show “OK” if the setting is correct and “Error” in case of an error.
The date and time can be seen in the submenu “4. Time” inside the main menu.

 Clear Energy

Select “2. Production reset” and press “OK” to enter the menu for deleting the energy data and in particular
the energy produced daily and in total, which is shown in the main interface. Press “OK” to start the
procedure; the display will show “Enter PWD!”, press “OK” to enter the password. Enter the password “0001”
using the “Up” and “Down” keys to select the number and “OK” to move to the next one, and confirm. If the
display shows “Wrong, try again!” press the “Back” key and enter the password again. When the password

entered is correct, the inverter will delete the data relating to the energy produced and the display will show
“OK” if the setting is successful.

 Clear Events

Select “3. Clear Events” and press “OK” to enter the menu for clearing historical events, i.e. to delete all error
warnings present in the submenu “List of historical events.” Press “OK” to start the procedure; the display
will show “OK” if the procedure is successful.

 Set Country

Select “4. Set Country” and press “OK” to enter the menu for setting the national grid connection regulations.
If “Setting Disabled” appears on the display, go to step “6. Enable Country” to enable this function. After

enabling the function, repeat the steps described above and set the code for the desired country using the
“Up” and “Down” keys, confirming with “OK”; the display will show “OK” if the setting is successful. The
current country code can be checked from the “System Info” menu.

Note: The change of the country code will take effect after the next start-up of the inverter.

For more information and to know the country regulations on board the inverter, refer to the following table.

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08

Belgium

20

Korea

32

CEI 0-21 Areti

09

UK-G59

21

Sweden

33-49

Reserved

10

China

22

General Europe

11

France

23

CEI 0-21 External

Code

Country

Code

Country

Code

Country

50

Germany VDE4105

- MT

62

Poland - MT

74

Cyprus - MT

51

Italy CEI 0-21 - MT

63

Germany BDEW -

MT

75

India - MT

52

Australia - MT

64

VDE 0126 - MT

76

Philippines - MT

53

Spain RD1699 - MT

65

Italy CEI 0-16 - MT

77

New Zealand - MT

54

Turkey – MT

66

UK-G83 – MT

78

Brazil - MT

55

Denmark – MT

67

Greece – islands –

MT

79

Slovakia VSD - MT

56

Greece mainland -

MT

68

EU EN50438 – MT

80

Slovakia SSE - MT

57

Netherlands - MT

69

IEC EN61727 – MT

81

Slovakia ZSD - MT

58

Belgium - MT

70

Korea - MT

82

CEI 0-21 Areti - MT

59

UK-G59 – MT

71

Sweden - MT

83-99

Reserved

60

China - MT

72

General Europe -

MT

61

France - MT

73

CEI 0-21 External -

MT

Table 3 – Country codes for 50K TL and 60K TL inverters

Table 4 – Country codes for 70K TL inverter

 Contr. ON-OFF

Select “5. Contr On-Off” and press “OK” to enter the menu for setting the remote control switch. The display
will show “Enter PWD!”, press “OK” to enter the password “0001” using the “Up” and “Down” keys to select
the number and “OK” to move to the next one. If the display shows “Wrong, try again!” press the “Back” key

and enter the password again. When the password has been entered correctly, you can enter the menu. Use

the “Up” and “Down” keys to select the “1. Enable” or “2. Disable” option and select it with the “OK” key. If
the “Enable” option is selected, use the “Up” and “Down” keys to indicate how many days you want to keep

the inverter switched off, confirm with OK. After setting the “Enable” option, contact the installer to obtain
the password for restarting the inverter.

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6. Relay command

1. Production

2. Alarm

3. Alarm config

4. Disable Relay

Production

The relay switches over whenever it detects a connection to (or
disconnection from) the grid.
If the relay contact is normally open (or closed), the relay will remain
open (or closed) until the inverter is connected to the grid; when the
inverter connects to the grid and starts feeding power, the relay
switches over and then closes (or opens).
When the inverter disconnects from the grid, the relay contact returns
to its standard position, i.e. open (or closed).

Alarm

The relay switches over it detects an alarm on the inverter (Error). In
case of a temporary alarm, no switch-over occurs.
If the relay contact is normally open (or closed), the relay remains
open (or closed) until the inverter detects an error; if the inverter
detects an error, the relay changes state and therefore closes (or
opens). The contact remains active with respect to its standard
condition until normal operation is restored.

Alarm configuration

The relay switches over when it detects an alarm (Error) or temporary
warning which was previously selected by the user via the PC. The
contact remains open (or closed) until the inverter detects an error or
warning other than those selected in the menu; when the inverter
displays an error or warning other than those selected, it changes state
and, therefore, closes (or opens). The relay remains active with respect
to its standby condition until the alarm or warning disappears.

Disabling the relay

The control function is not permitted.

 Relay command

Select “6. Relay Command” and press “OK” to enter the menu for setting the relay command. Use the “Up”
and “Down” keys to select the respective configuration items, as shown below. Press “OK” to select. If the
setting is successful, “OK” will be displayed; otherwise, “Error” will be displayed.

Below is a detailed definition of the configurations that can be set:

 Enable country

Select “7. Enable country” and press “OK” to enter the menu for enabling the selection of the country code.
The display will show “Enter PWD!”, press “OK” to enter the password. Enter the password (“0001”) using

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the “Up” and “Down” keys to select the number and “OK” to move to the next one, and confirm. If the display
shows “Wrong, try again!” press the “Back” key and enter the password again. When the password has been

entered correctly, you can enter the menu.

This operation must be carried out if you want to change the Country code and it has not been changed
during the last 24 hours of operation of the inverter.

 Set Energy

Select “8. SetEnergy” and press “OK” to enter the menu for setting the energy already produced by the
photovoltaic system. The display will show “Enter PWD!” Press “OK” to enter the password “0001” using the

“Up” and “Down” keys to select the number and “OK” to move to the next one. If the display shows “Wrong,
try again,” press the “Menu/Back” key and enter the password again. When the password has been entered

correctly, you can enter the menu. You can now set the amount of energy already produced by the system
before installing the current inverter, which is visible from the main interface.

 Modbus address

Select “9. ModBusAddress” and press “OK” to enter the menu for selecting the communication address.
Use the “Up” and “Down” keys to select the number and “OK” to move to the next one, and confirm.
After setting the address, press “OK.”

The Modbus address indicates the address with which the inverter sends its data to the monitoring
server. Address 01 is used for single inverters; to extend the monitoring to multiple inverters, use
progressive communication addresses.

Note: make sure that the address entered is never 00, because this setting would exclude the
possibility of communication between the inverter and the Wi-Fi network or RS485 port.

 Set MPPT

Select the input mode: the 50K-70K TL inverters are equipped with two MPPTs, which can operate
independently or in parallel, depending on the requirements of the system in which they are installed. The
input mode can be set by the user via the LCD display.

Select “10. MPPT” and press “OK” to enter the menu for setting the input mode. Press the “Up” and “Down”
keys to change the input mode between “1. Parallel” and “2. Independent”, then press OK to confirm. If the
setting is successful, “OK” will be displayed; otherwise, “Error” will be displayed.

Note: The change of the input type will take effect after the next start-up of the inverter.

If this parameter is not set, the inverter will remain in its default condition, i.e. independent inputs.

 Language

Select “11. “Language” and press “OK” to enter the menu for selecting the language. Select the language

using the “Up” and “Down” keys; then press “OK” to confirm.

If the setting is successful, “OK” will be displayed; otherwise, “Error” will be displayed.

A quicker way to change the language is to press the “Menu/Back” key and “OK” key at the same time.

In the current firmware version (V1.40), the available languages are Chinese, English, Italian, German,
French and Portuguese; future firmware updates may add additional languages.

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 Initial parameters

The user can change the initial parameters directly from the LCD display. The user must first copy the TXT
files to the SD card. These files can be requested from Zucchetti Centro Sistemi Spa technical support.

Select “12. InitParameters” and press “OK” to enter the menu for setting the initial parameters. The display
will show “Enter PWD!”, press “OK” to enter the password. Enter the password “0001” using the “Up” and
“Down” keys to select the number and “OK” to move to the next one, and confirm. If the display shows
“Wrong, try again!” press the “Back” key and enter the password again. When the password has been

entered correctly, you can enter the menu. The new parameters will now be loaded on the inverter
automatically.

If the setting is successful, “OK” will be displayed; otherwise, “Error” will be displayed.

Attention: do not enter this menu if the microSD card is not inserted in the appropriate slot of the inverter
or if the correct TXT files have not been copied to it.

 Safety Voltage

The user can change the value of the protection voltage directly from the LCD display. The user must first
copy the TXT files to the SD card. These files can be requested from Zucchetti Centro Sistemi Spa technical
support.

Select “13. Safety V” and press “OK” to enter the menu for setting the protection voltage. The display will
show “Enter PWD!”, press “OK” to enter the password. Enter the password “0001” using the “Up” and
“Down” keys to select the number and “OK” to move to the next one, and confirm. If the display shows
“Wrong, try again!” press the “Back” key and enter the password again. When the password has been

entered correctly, you can enter the menu. The new protection voltage will now be loaded on the inverter
automatically.

If the setting is successful, “OK” will be displayed; otherwise, “Error” will be displayed.

Attention: do not enter this menu if the microSD card is not inserted in the appropriate slot of the inverter
or if the correct TXT files have not been copied to it.

 Safety Hz

The user can change the value of the protection frequency directly from the LCD display. The user must first
copy the TXT files to the SD card. These files can be requested from Zucchetti Centro Sistemi Spa technical
support.

Select “14. Safety Hz” and press “OK” to enter the menu for setting the protection frequency. The display will
show “Enter PWD!”, press “OK” to enter the password. Enter the password “0001” using the “Up” and
“Down” keys to select the number and “OK” to move to the next one, and confirm. If the display shows
“Wrong, try again!” press the “Back” key and enter the password again. When the password has been

entered correctly, you can enter the menu. The new protection frequency will now be loaded on the
inverter automatically.

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If the setting is successful, “OK” will be displayed; otherwise, “Error” will be displayed.

Attention: do not enter this menu if the microSD card is not inserted in the appropriate slot of the inverter
or if the correct TXT files have not been copied to it.

 Insulation

The user can change the value of the insulation resistance directly from the LCD display. The user must first
copy the TXT files to the SD card. These files can be requested from Zucchetti Centro Sistemi Spa technical
support.

Select “15. Insulation” and press “OK” to enter the menu for setting the insulation resistance. The display
will show “Enter PWD!”, press “OK” to enter the password. Enter the password “0001” using the “Up” and
“Down” keys to select the number and “OK” to move to the next one, and confirm. If the display shows
“Wrong, try again!” press the “Back” key and enter the password again. When the password has been

entered correctly, you can enter the menu. The new insulation resistance will now be loaded on the inverter
automatically.

If the setting is successful, “OK” will be displayed; otherwise, “Error” will be displayed.

Attention: do not enter this menu if the microSD card is not inserted in the appropriate slot of the inverter
or if the correct TXT files have not been copied to it.

 Relay Test

Select “16. Test relay” and press “OK” to enter the test menu of the relay inside the inverter. Use the “Up” and
“Down” keys to select the “1. Enable” or “2. Disable” option and “OK” to confirm. If the option “1. Enable” is

selected, the relay test is performed. If the setting is successful, “OK” will be displayed; otherwise, “Error”
will be displayed.

 Reactive Power Setting

Select “17. Reactive Set” and press “OK” to enter the menu for setting the reactive power produced. The
display will show “Enter PWD!”, press “OK” to enter the password. Enter the password “0001” using the “Up”
and “Down” keys to select the number and “OK” to move to the next one, and confirm. If the display shows
“Wrong, try again!” press the “Back” key and enter the password again. When the password has been entered
correctly, you can enter the menu. Now you can use the “Up” and “Down” keys to select the “1. Enable” or “2.
Disable” option, and “OK” to confirm. If the “1. Enable” option is selected, use the “Up” and “Down” keys to
select the options “Under-excited”, “Grid Manager”, and “Over-excited”, and indicate the value of the reactive
power produced for each of them (expressed as the value of cosφ=*.**). If the setting is successful, “OK” will
be displayed; otherwise, “Error” will be displayed.

 Power derating

Select “18. Derating P (W)” and press “OK” to enter the relative menu from which you can enable the
“Derating” function, i.e. the possibility to set the power produced by the inverter. The display will show
“Enter PWD!”, press “OK” to enter the password. Enter the password “0001” using the “Up” and “Down” keys

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to select the number and “OK” to move to the next one, and confirm. If the display shows “Wrong, try again!”
press the “Back” key and enter the password again. When the password has been entered correctly, you can

enter the menu. Use the “Up” and “Down” keys to select the “1. Enable” and “2. Disable” option, and “OK” to
confirm. If the “1. Enable” option is selected, use the “Up”, “Down” and “OK” keys to select the percentage
value (between 0 and 100) of the maximum power that the inverter will produce; if the solar radiation
allows a greater amount of energy to be produced, the inverter will carry out the necessary operations to
limit the output power to the set value. If the setting is successful, “OK” will be displayed; otherwise, “Error”
will be displayed.

 Grounding check

Select “19. Check PE Line” and press “OK” to enter the menu for checking the ground line. The display will
show “Enter PWD!”, press “OK” to enter it. Enter the password “0001” using the “Up” and “Down” keys to
select the number and “OK” to move to the next one, and confirm. If the display shows “Wrong, try again!”
press the “Back” key and enter the password again. When the password has been entered correctly, you can

enter the menu. Now use the “Up” and “Down” keys to select the “1. Enable” or “2. Disable” option, and “OK”
to confirm. If the option “1. Enable” is selected, the function for checking the ground line will be executed
and the inverter will not start producing power if the grounding line is not present and properly connected;
this setting is active by default on all three-phase inverters. If “2. Disable” is selected, the inverter will start
operating and it will produce power even without the ground connection line. If the setting is successful, “OK”
will be displayed; otherwise, “Error” will be displayed.

 P(grid) Check

Select “20. P(grid) Check” and press “OK” to enter the relative menu, from which you can enable the “Reflux
Power” function, i.e. the possibility to set the maximum power fed into the grid. The display will show “Enter
PWD!”, press “OK” to enter the password. Enter the password “0001” using the “Up” and “Down” keys to
select the number and “OK” to move to the next one, and confirm. If the display shows “Wrong, try again!”
press the “Back” key and enter the password again. When the password has been entered correctly, you can

enter the menu. Use the “Up” and “Down” keys to select “1. Enable” and “2. Disable” option, and “OK” to
confirm. In this way the inverter can feed a maximum power of between 0 kW and the rated power of the
inverter into the national grid, based on the solar radiation available and the domestic consumption. If the
setting is successful, “OK” will be displayed; otherwise, “Error” will be displayed.

Note: To activate the Reflux Power mode in three-phase inverters, it is necessary to install the Anti Reverse

Power Controller and three CT sensors, as described in the appropriate procedure. This device can be
purchased from suppliers of photovoltaic materials.

The size of the inverter and power value you wish to feed into the grid must be specified at the time of
purchase.

 MPPT Scan

Select “21. MPPT Scan” and press “OK” to enter the relative menu, from which you can enable the “MPPT
Scan” function, i.e. the possibility to set the periodic search for the Maximum Power Point. Enter the
password “0001” using the “Up” and “Down” keys to select the number and “OK” to move to the next one,

and confirm. If the display shows “Wrong, try again!” press the “Back” key and enter the password again.
When the password has been entered correctly, you can enter the menu. Use the “Up” and “Down” keys to

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choose between the items “Set Scan Param” and “Scan Test”. For each of the two items, you can use the “Up”
and “Down” keys to select the “1. Enable” and “2. Disable” option, and “OK” to confirm. Entering the first
menu, if the option “1. Enable” is selected, you will be able to select the “Scan Freq” i.e. the time interval in

which the new MPPT will be searched (the time is expressed in ** min); with this function, the photovoltaic
production will be reset every ** minutes and will return to the current maximum power point. If the setting
is successful, “OK” will be displayed; otherwise, “Error” will be displayed. The second item “Scan Test” allows
performing an instant test to search for the current MPPT so that the inverter moves to the condition of
maximum power.

This function can be used if there is a lot of shade on the panels, thus reducing their efficiency and
productivity. Under optimal conditions, however, this function is not recommended, as it would limit the
productivity of the inverter.

 P(f) Setting

Select “22. Set P(f)” and press “OK” to enter the relative menu, from which you can change the active power

according to the local grid frequency requirements. This function may be required by various regulations for
grid-connected inverters. Use the “Up”, “Down” and “OK” keys to set the time delay expressed in seconds
(*.***s) before the changed P active power will intervene.

 Q(v) Setting

Select “23. Set Q(v)” and press “OK” to enter the relative menu, from which you can change the reactive

power according to the local grid voltage requirements. This function may be required by various
regulations for grid-connected inverters. Use the “Up”, “Down” and “OK” keys to set the time delay expressed
in seconds (*.***s) before the changed Q reactive power will intervene.

 81.S1 Control

Select “24. Control81.S1” and press “OK” to enter the relative menu, from which it will be possible to enable
the frequency restriction thresholds required in special cases by local regulations. Use the “Up” and “Down”
keys to select the “1. Enable 81.S1” and “2. Disable 81.S1” option, and confirm with “OK”. The display will
show “OK” if the setting is successful.

 Fast self-test

1) During normal operation of the inverter, press the “Back” key to enter the main menu.

2) Press the “OK” key to enter the “Settings” menu.

3) Press the “Down” key several times until “25. Fast Self-test” is displayed on the screen.

4) Press “OK” to start the self-test.

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5) The self-test will now start automatically; once completed, press “Down” to display the self-test

results, as shown in the figure.

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 Standard Self-test

1) During normal operation of the inverter, press the “Back” key to enter the main menu.

2) Press the “OK” key to enter the “Settings” menu.

3) Press the “Down” key several times until “26. Standard Self-Test” is displayed on the screen.

4) Press “OK” to start the self-test.

5) The self-test will now start automatically; once completed, press “Down” to display the self-test

results, as shown in the figure.

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(B) Press the “OK” key to enter the “Event List” menu

The “Event List” menu displays the events registered by the inverter, both historical and in real time,
showing the progressive number of the event, its identification code, and date and time of its occurrence.
The user can access this interface from the LCD display to check the details of the alarms and alerts.
Errors will be listed according to the date and time they occurred, so the most recent events will be listed
first. For more information, see the figure below.

Press the “Back” key on the main interface and then the “Down” key to enter the “2. Event List” menu.

From here you can select the “1. Current Events” menu for the list of current events or “2. Historical
Events” for the list of historical events.

(C) Press the “OK” key to enter the “System Info” menu.

The “System Info” menu contains the following submenus:

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 Inverter type

Use the “Up” and “Down” keys in the “System Info” menu to move, and the “OK” key to enter the “1. Inverter
type” menu. Here you can see the power of the inverter model

 Serial number

Use the “Up” and “Down” keys in the “System Info” menu to move, and the “OK” key to enter the “2. Serial
Number” menu. Here you can see the serial number of the inverter.

 SW version

Use the “Up” and “Down” keys in the “System Info” menu to move, and the “OK” key to enter the “3. SW
Version” menu. Here you can see the software version.

 HW version

Use the “Up” and “Down” keys in the “System Info” menu to move, and the “OK” key to enter the “4. HW
Version” menu. Here you can see the hardware version.

 Country

Use the “Up” and “Down” keys in the “System Info” menu to move, and the “OK” key to enter the “5. Country”

menu. Here you can see the country code that has been set.

 Input

Use the “Up” and “Down” keys in the “System Info” menu to move, and the “OK” key to enter the “6. Input”

menu. Here you can see the type of input of the photovoltaic strings.

 AC Thresholds

Use the “Up” and “Down” keys in the “System Info” menu to move, and the “OK” key to enter the “7. AC
Thresholds” menu. Here you can see the value of the voltage and frequency thresholds for the relay to trip.

 Power factor

Use the “Up” and “Down” keys in the “System Info” menu to move, and the “OK” key to enter the “8. Power
Factor” menu. Here you can see the value of the power factor.

 P(Grid) Feed-in

Use the “Up” and “Down” keys in the “System Info” menu to move, and the “OK” key to enter the “9. P(Grid)
Feed-in” menu. Here you can see the value of the power fed into the grid.

 Power Ratio

Use the “Up” and “Down” keys in the “System Info” menu to move, and the “OK” key to enter the “10. Power
Ratio” menu. Here you can see whether this function has been enabled or not.

 P(f)

Use the “Up” and “Down” keys in the “System Info” menu to move, and the “OK” key to enter the “11. P(f)”

menu. Here you can see the P(f) value that has been set.

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 Q(v)

Use the “Up” and “Down” keys in the “System Info” menu to move, and the “OK” key to enter the “12. Q(v)”

menu. Here you can see the Q(v) value that has been set.

 Service Code

Use the “Up” and “Down” keys in the “System Info” menu to move, and the “OK” key to enter the “13.
Service.Code” menu. Here you can see the currently installed firmware version.

(D) Press the “OK” key to enter the “Date and Time” menu.

Press the “Back” key in the main interface and the “Up” or “Down” keys to enter the submenu “4. Date and
Time”, then press “OK” to display the current date and time set on the inverter.

(A) Press the “OK” key to enter the “Software Update” menu.

Press the “Back” key in the main interface and the “Up” or “Down” keys to enter the submenu “5. Software
Update”, then press “OK” to enter. The display will show “Enter PWD!.” Press “OK” to enter the password
“0715” using the “Up” and “Down” keys to select the number and “OK” to move to the next digit and confirm.
If the display shows “Wrong, try again!” press the “Back” key and enter the password again. When the

password has been entered correctly, you can enter the menu and start updating the firmware.

Note: You can check the firmware version currently installed on the inverter from the “Service Code”

submenu found in the “System Info” menu.

IMPORTANT: Do not perform any update operation if there is no microSD card inside the inverter or if the

microSD card does not contain the appropriate update files. Always make sure that the correct update files
are loaded on the microSD card and that the card is correctly inserted in the appropriate slot.

Note: the microSD card is not supplied with the inverter and must be procured by the installer or customer.

The complete and detailed procedure for updating the firmware is described below.

Update requirements

- 4 Gb MicroSD card

- MicroSD to SD adapter or MicroSD to USB adapter for inserting the MicroSD card into the PC.

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Firmware update procedure

1. Switch off the ZCS inverter by first disconnecting the AC power supply via the switch installed on the

system, and then disconnecting the DC power supply via the switch located on the side of the
inverter (if equipped) or switch off the system’s disconnecting switch. Wait for the display to turn off
completely.

2. Unscrew the four star screws and remove the central cover found on the front of the inverter.

Figure 39 – Removing the central cover

3. Extract (if PRESENT) the microSD card from its slot by pressing lightly on the card and pulling it out

of the inverter. Alternatively, obtain the microSD card yourself. Then insert it into the PC using the
appropriate adapter.

4. Open the microSD card drive and create a new folder with the name firmware, making sure to

match the lowercase and uppercase letters as indicated and checking that there are no spaces. Now
copy the files attached to the email into the firmware folder.

5. Extract the microSD card from the PC using the “safely remove hardware” procedure.

6. Insert the microSD card in the appropriate slot of the inverter.

7. Only supply DC power to the inverter through the appropriate switch and wait a few seconds for the

display to come on.

8. From the display, press the “Menu/Back” key (first from the left) to enter the menu, and then the

“OK” key (fourth from the left) to enter the SOFTWARE UPDATE item. Enter the password 0715 and
press “OK” again to start the update.

9. The update process will take about 3 minutes and will run automatically. The following indications

will follow:

a. DSP1 Update
b. DSP2 Update
c. ARM Update

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10. Check that the inverter completes the update correctly and that “INITIALIZING” appears on the

display; the inverter will then start normally. If the update was not successful, one of the following
messages will appear on the display: “COMMUNICATE FAIL”, “UPDATE DSP1 FAIL” or “UPDATE
DSP2 FAIL”; in this case, switch off the inverter, wait one minute and restart the procedure from step

7.

11. Once the update has been successfully completed, the country code must be changed. Press the

“Menu/Back” key to enter the “Settings” menu, then scroll down to the “Set Country” item and enter

the country code 22.

Note: if the inverter has been running for more than 24 hours, this function must first be enabled

from the “Enable Country” menu, which corresponds to item 6 of the “Settings” menu. Enter the

password 0001.

12. Switch off the inverter via the disconnecting switch on the DC line.

13. Restart the inverter by supplying DC power and enter the country selection menu again; set the

country code according to the grid standard in your country (e.g. CEI-021 INT, CEI-021 EXT, CEI-016
for Italy).

14. Switch off the system and restart it after waiting a few minutes, as indicated in step 13.

15. The update procedure has now been completed, and the inverter can now be connected to the AC

line by connecting it to the grid. The new firmware version can be checked from the “Service Code”
submenu found inside the “System Info” menu.

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Error code

Error name

Error description

Possible solution

ID01

GridOVP

Grid voltage is too

high.

If these errors occur occasionally, the

cause may be that the electric grid is

in an abnormal state.

The inverter will automatically return

to its normal operating state when the

grid is restored to its normal state.

If the alarm occurs frequently, check

whether the grid voltage/frequency is

within the correct range. If not,

contact technical support. If so, check

the AC circuit breaker and the AC

wiring of the inverter.

If the voltage/frequency is within the
acceptable range and the AC wiring is

correct while the alarm occurs

repeatedly, contact Technical Support

to change the grid overvoltage,

undervoltage, over-frequency and

under-frequency protection points

after obtaining approval from the

local grid operator.

ID02

GridUVP

Grid voltage is too

low.

ID03

GridOFP

Grid frequency is too

high.

ID04

GridUFP

Grid frequency is too

low.

7. Troubleshooting and maintenance

7.1. Troubleshooting

This section contains information and procedures on how to troubleshoot any faults and errors that may
occur during operation of the 50K-70K TL inverter.

If you have any problems with the inverter, please follow these steps.

 Check the warning messages and error codes on the information panel of the inverter. Record them

before any further operation.

 If the inverter does not display any errors, perform the following checks:

- Is the inverter located in a clean, dry and properly ventilated place?

- Is the DC switch closed?

- Are the cables correctly sized and as short as possible?

- Are the input/output connections and the cables in good condition?

- Are the configuration settings correct for the type of installation?

- Are the display panel and flat communication cable correctly connected and not damaged?

Follow the steps below to display the recorded alarms:

Press “Menu/Back” to enter the main menu from the standard interface. Select “Event List” in the menu
screen, then press “OK” to access the list of alarms and errors.

Information on event list

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ID05

PVUVP

Input voltage is too

low.

Check whether too few photovoltaic

modules have been connected in

series in a PV string; therefore, the

voltage (Vmp) of the PV string is

lower than the minimum operating

voltage of the inverter. In this case,

adjust the number of photovoltaic

modules connected in series to

increase the voltage of the PV string,

so that it falls within the input voltage

range of the inverter.

ID06

Vlvrtlow

Feed-through voltage

is too low.

Check the AC grid connections, and if

they are correct, contact technical

support.

ID07-ID08

Reserved

Reserved

Reserved

ID09

PvOVP

Input voltage is too

high.

The inverter automatically returns to

its normal operating state after

correct adjustment.

Check whether too many photovoltaic

modules have been connected in

series in a PV string; therefore, the

voltage (Voc) of the PV string is

higher than the maximum input

voltage of the inverter. In this case,

decrease the voltage of the PV string

by adjusting the number of

photovoltaic modules connected in

series, making sure that it falls within

the input voltage range of the

inverter. The inverter automatically

returns to its normal operating state

after the correct adjustments.

ID10

IpvUnbalance

Input current is not

balanced.

Check the configuration of the input
mode (parallel mode / independent

mode) of the inverter, as indicated in

Section 6.3 (C). “6. Input Mode” of this

user manual; if it is incorrect, change

it according to Section 6.3(A).

ID11

PvConfigSetWrong

Incorrect input mode

ID12

GFCIFault

Faulty automatic

differential circuit

breaker.

If the error occurs occasionally, the

cause may be that the external
circuits have temporary faults.

The inverter will automatically return

to its normal operating state after the

error has been fixed.

ID13

PhaseSuenceFault

Error in the sequence

of phases

If the error occurs occasionally, the

cause may be that the grid has

temporary faults.

If the fault occurs frequently, check

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whether the mains voltage and

frequency are in an acceptable range.

If not, contact technical support.

Otherwise, check the conditions of the

AC switch and the cable harness.

ID14

HwBoostOCP

Input current is too

high and has

triggered the

hardware protection.

Check whether the input current is

higher than the maximum input

current of the inverters, then check

the input wiring; if both are correct,

contact Technical Support.

ID15

HwAcOCP

Grid current is too

high and has

triggered the

hardware protection.

ID15-ID24 are internal faults of the

inverter; turn off the “DC switch”, wait

5 minutes and then turn it back on

again. Check that the fault is no longer

present. If this is not the case, contact

Technical Support.

ID16

AcRmsOCP

Grid current is too

high.

ID17

HwADFaultIGrid

Sampling error of the

grid current.

ID18

HwADFaultDCI

DCI sampling error.

ID19

HwADFaultVGrid

Sampling error of the

grid voltage.

ID20

GFCIDeviceFault

GFCI sampling error.

ID21

MChip_Fault

Master chip fault

ID22

HwAuxPowerFault

Auxiliary voltage

error

ID23

BusVoltZeroFault

Current sampling

error.

ID24

IacRmsUnbalance

Output current is not

balanced.

ID25

BusUVP

Bus voltage is too low.

If the configuration of the PV string is

correct (no ID05 fault present), the

cause may be that the solar radiation

is too low. The inverter

automatically returns to its normal

operating state when the solar

radiation returns to a normal level.

ID26

BusOVP

Bus voltage is too

high.

ID26-ID27 are internal faults of the

inverter; turn off the “DC switch”, wait

5 minutes and then turn it back on

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ID27

VbusUnbalance

Bus voltage is not

balanced.

again. Check that the fault is no longer

present. If this is not the case, contact

Technical Support.

ID28

DciOCP

DCI is too high.

Check the configuration of the input
mode (parallel mode / independent

mode) of the inverter, as indicated in

Section 6.3 (C). “6. Input Mode” of this

user manual. If it is not correct,

change it according to Section 6.3 (A)

“10. Configuration of the Input Mode”

of this manual.

If the input mode is correct, turn off

the “DC switch”, wait 5 minutes and

then turn it back on again. Check that
the fault is no longer present. If this is

not the case, contact Technical

Support. If it is not correct, change it

according to Section 6.3 (A) “10.

Configuration of the Input Mode” of

this manual.

ID29

SwOCPInstant

Grid current is too

high.

Internal fault of the inverter; turn off

the “DC switch”, wait 5 minutes and

then turn it back on again. Check that

the fault is no longer present. If this is

not the case, contact Technical

Support.

ID30

SwBOCPInstant

Input current is too

high.

Check whether the input current is

higher than the maximum input

current of the inverter, then check

the input wiring; if both are correct,

contact Technical Support.

ID31-ID48

Reserved

Reserved

Reserved

ID49

ConsistentFault_VGrid

Grid voltage sampling

value between the
master DSP and slave
DSP is not consistent.

ID49-ID55 are internal faults of the

inverter; turn off the “DC switch”, wait

5 minutes and then turn it back on

again. Check that the fault is no longer

present. If this is not the case, contact

Technical Support.

ID50

ConsistentFault_FGrid

Grid frequency
sampling value

between the master

DSP and slave DSP is

not consistent.

ID51

ConsistentFault_DCI

Current sampling

value of the automatic

differential circuit

breaker between the

master DSP and the

slave DSP is not

consistent.

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ID52

ConsistentFault_GFCI

Sampling value of the
automatic differential

circuit breaker

between the master

DSP and the slave DSP

is not consistent.

ID53

SpiCommLose

SPI communication

between the master

DSP and the slave DSP

is faulty.

ID54

SciCommLose

SCI communication

between the control

board and

communication board

is faulty.

ID55

RelayTestFail

Relay fault.

ID56

PvIsoFault

Insulation resistance

is too low.

Check the insulation resistance

between the photovoltaic string and

the ground, in the event of a short

circuit, fix the fault.

ID57

OverTempFault_Inv

Temperature of the
inverter is too high.

Check whether the installation

position and the installation method

meet the requirements of Section 3.4

of this user manual.

Check whether the ambient

temperature in the installation

location exceeds the allowed limit. If

so, improve the ventilation to reduce

the temperature.

ID58

OverTempFault_Boost

Boost temperature is

too high.

ID59

OverTempFault_Env

Ambient temperature

is too high.

ID60-ID64

Reserved

Reserved

Reserved

ID65

UnrecoverHwAcOCP

Grid current is too

high and has caused

an unrecoverable

hardware failure.

ID65-ID70 are internal faults of the

inverter; turn off the “DC switch”, wait

5 minutes and then turn it back on

again. Check whether the fault has

been resolved. If not, contact

Technical Support.

ID66

UnrecoverBusOVP

Bus voltage is too

high and has caused

an unrecoverable

fault.

ID67

UnrecoverIacRmsUnbalance

Grid current is not

balanced and has

caused an

unrecoverable fault.

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ID68

UnrecoverIpvUnbalance

Input current is not

balanced and has

caused an

unrecoverable fault.

ID69

UnrecoverVbusUnbalance

Bus voltage is not

balanced and has

caused an

unrecoverable fault.

ID70

UnrecoverOCPInstant

Grid current is too

high and has caused

an unrecoverable

fault.

ID71

UnrecoverPvConfigSetWrong

Incorrect input mode

Check the configuration of the input
mode (parallel mode / independent

mode) of the inverter, as indicated in

Section 6.3 (C) “6. Input Mode” of this

user manual. If it is not correct,

change it according to Section 6.3 (A).

ID72-ID73

Reserved

Reserved

Reserved

ID74

UnrecoverIPVInstant

Input current is too

high and has caused

an unrecoverable

fault.

ID74-ID77 are internal faults of the

inverter; turn off the “DC switch”, wait

5 minutes and then turn it back on

again. Check whether the fault has

been resolved. If not, contact

Technical Support.

ID75

UnrecoverWRITEEEPROM

EEPROM cannot be

recovered.

ID76

UnrecoverREADEEPROM

EEPROM cannot be

recovered.

ID77

UnrecoverRelayFail

Relay has generated a

permanent fault.

ID78-ID80

Reserved

Reserved

Reserved

ID81

OverTempDerating

Inverter has been

derated because the

temperature is too

high.

Check whether the installation

position and the installation method

meet the requirements of Section 3.4

of this user manual.

Check whether the ambient

temperature in the installation

location exceeds the allowed limit. If

so, improve the ventilation to reduce

the temperature.

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ID82

OverFreqDerating

Inverter has been

derated because the

grid current is too

high.

The inverter automatically reduces

the output power when the frequency

of the electrical grid is too high.

ID83

RemoteDerating

Inverter has been

derated by the remote

control

The inverter registers an ID83 error
in case of remote derating operation.
Check the wiring of the remote input

and the port of the output control
signal on the communication board
according to section 4.5 of this user

manual.

ID84

RemoteOff

Inverter was turned

off by remote control.

The inverter registers an ID84 error
in case of remote shut-off operation.

Check the wiring of the remote input

and the port of the output control

signal on the communication board,

according to section 4.5 of this user

manual.

ID85

UnderFreqDerating

Inverter has been

derated because the

grid current is too

low.

The inverter automatically reduces

the output power when the frequency

of the electrical grid is too low.

ID86

Fan 5 Alarm

Fault on fan 5

Check the operation of the internal

fan. If the fan is not working, replace

it. If the error persists even after

replacement, contact Technical

Support.

ID87

Fan 4 Alarm

Fault on fan 4

Check the operation of the internal

fan. If the fan is not working, replace

it. If the error persists even after

replacement, contact Technical

Support.

ID88-ID89

Reserved

Reserved

Reserved

ID90

Fan 3 Alarm

Fault on fan 3

Check the operation of the internal

fan. If the fan is not working, replace

it. If the error persists even after

replacement, contact Technical

Support.

ID91

Fan 1 Alarm

Fault on fan 1

Check the operation of the internal

fan. If the fan is not working, replace

it. If the error persists even after

replacement, contact Technical

Support.

ID92

Fan 2 Alarm

Fault on fan 2

Check the operation of the internal

fan. If the fan is not working, replace

it. If the error persists even after

replacement, contact Technical

Support.

ID93

Start-up protection alarm

Error during start up

Check the start-up protection module.

If there is no damage, contact

Technical Support.

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ID94

The software version is

unsuitable

Software between the

control board and

communication board

is unsuitable.

Contact Technical Support to update

the software.

ID95

Faulty EEPROM

communication board.

EEPROM of the

communication board

is faulty.

ID95-ID96 are internal faults of the

inverter; turn off the “DC switch”, wait

5 minutes and then turn it back on

again. Check that the fault is no longer

present. If this is not the case, contact

Technical Support.

ID96

Faulty RTC clock chip

RTC clock chip is

faulty.

ID97

Invalid country code

Country code is not

valid.

Check the configuration of the

country, as indicated in Section 6.3

(C) “5. Country” of this user manual; if

it is not correct, change it according to

Section 6.3(A) “4. Configuration of

country code” of this manual.

ID98

MicroSD card fault

MicroSD card is faulty

or a false contact has

occurred.

Replace the SD card.

ID99-ID100

Reserved

Reserved

Reserved

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7.2. Maintenance

Inverters generally do not require daily or routine maintenance. In any case, for proper long-term operation
of the inverter, make sure that the heatsink for cooling the inverter has enough space to ensure adequate
ventilation and that it is not obstructed by dust or other items.

Cleaning the inverter

Use an air compressor, soft dry cloth or soft-bristled brush to clean the inverter. Do not use water, corrosive
chemical substances or aggressive detergents to clean the inverter. Disconnect the AC and DC power to the
inverter before cleaning.

Cleaning the heatsink

Use an air compressor, a soft dry cloth or soft-bristled brush to clean the heatsink. Do not use water,
corrosive chemical substances or aggressive detergents to clean the heatsink. Disconnect the AC and DC
power to the inverter before cleaning.

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8. Uninstalling

8.1. Steps for uninstalling the inverter

 Disconnect the inverter from the AC grid by opening the AC circuit breaker.
 Disconnect the inverter from the photovoltaic strings by opening the DC circuit breaker.
 Wait 5 minutes
 Remove the DC connectors
 Remove the AC terminals.
 Unscrew the fixing bolt of the bracket and remove the inverter from the wall.

8.2. Packaging

If possible, pack the inverter in its original packaging.

8.3. Storage

Store the inverter in a dry place where the ambient temperature is between -25 and +60°C.

8.4. Disposal

At the end of its life, dispose of the inverter and the packaging materials in places that can manage and
recycle electrical equipment safely.

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Technical specifications

50000 TL

60000 TL

70000 TL

Input (DC)

Maximum DC Power

55000W

66000W

77000W

Maximum DC power for each MPPT

22000W (500V-

800V)

22000W (5030V-

800V)

26000W (660V-800V)

No. of independent MPPTs / No. of

strings per MPPT

3 / (4/3/3)

3 / (4/4/4)

Maximum DC input voltage

1000V

DC activation voltage

350V

Rated DC input voltage

600V

700V

MPPT DC voltage range

250V-960V

DC voltage range at full load

500V-800V

530V-800V

660V-800V

Max input DC current for each MPPT

40A/30A/30A

40A/40A/40A

Max input DC current for each string

12A

Output (AC)

Rated AC output

50000W

60000W

70000W

Maximum AC power

50000W

60000W

70000W

Maximum AC current for each phase

80A

90A

Rated grid voltage

3/N/PE,230/400V (+/- 20%)

3/N/PE,277/480V

Grid voltage range (according to

local grid standards)

180V-270V

243V-304V

Rated grid frequency

50Hz/60Hz

Grid frequency range (according to

local grid standards)

45-53Hz / 57-63 Hz

Active power adjustable range

0-100%

Total harmonic distortion

<3%

Power factor

1 (adjustable +/-0.8)

Grid feed limit

Feed adjustable from zero to nominal value (ARPC required)

Operating performance

9. Technical specifications

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Maximum efficiency

98.5%

98.6%

Weighted efficiency (EURO/CEC)

98.3%

98.4%

Consumption at night

<1W

MPPT efficiency

>99.9%

Protection

Reverse polarity protection DC

Yes

DC circuit breaker

Integrated

Protection class / Overvoltage

category

I/III

Integrated dischargers

AC/DC MOV: Type III standard, optional AC/DC dischargers type II

(only S5 models)

Safety protection

Anti-islanding, RCMU, Ground leakage monitoring

Overheating protection

Yes

Standard

EMC

EN 61000-6-1/2/3/4,

Safety standard

IEC 62116, IEC 61727, IEC 61683, IEC 60068-1/2/14/30, IEC 62109-

1/2

Grid connection standard

CE, CGC, ZVRT, AS 4777, AS 3100, VDE-AR-N 4105, EN50438, G83/2,

G59/3, C10/11, CEI 0-21, CEI 0-16

Communication

Communication interfaces

Wi-Fi (optional), RS485 (proprietary protocol), SD card

Additional inputs or connections

I/O inputs for connection to anti-reverse power controller

Data storage on SD

25 years

General information

Ambient temperature range

-25°C...+60°C (power limit above 45°C)

Topology

Transformerless

Degree of protection

IP65

Permissible relative humidity

0...95% Non-condensing

Maximum operating altitude

2000m

Acoustic emission

<30dB@1m

<45dB@1m

Weight

68kg

70kg

Cooling system

Forced

Dimensions (HxWxD)

737 x 713 x 297 mm

User interface

LCD display

Warranty

10 years

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Manual of 07/06/2019 Rev. 1.1“User Manual for 50K-70K TL”

10. Warranty

Zucchetti Centro Sistemi SpA provides a 10-year product warranty from the date of installation of the 50K­70K TL inverter, subject to registration on the website https://www.zcsazzurro.com/it/estensione-

garanzia. In any case, the warranty cannot exceed 126 months from the date of delivery of the inverter.

During the warranty period, Zucchetti Centro Sistemi S.p.A. guarantees normal operation of the inverter.

If the inverter is defective or faulty during the warranty period, contact your installer or supplier. If the fault
falls within the responsibility of the manufacturer, Zucchetti Centro Sistemi S.p.A. will provide service and
maintenance free of charge.

Warranty exclusions

 Use of the 50K-70K TL inverters for any other purpose than the intended one.
 Defective or faulty design or installation of the photovoltaic system.
 Improper use of the inverter.
 Incorrect configuration of the protections on the inverter.
 Unauthorised modifications to the inverter.
 Damage caused by external factors or force majeure (e.g. lightning, power surges, bad weather, fire,

earthquakes, tsunamis, etc.)

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