Page 1 UNE ZHERO MANUAL Ver. 0.1 UNE SRL - VIA MODENA 48/E – 42015 CORREGGIO (RE) - ITALY - VAT No. 02513460358 - T.+39 0522 693566 - F. +39 0522 1483326 - INFO@UNESRL.COM – https://www.unesrl.com...
Page 2: Table Of Contents
UNE ZHERO connection to the photovoltaic generator ................44 5.9.2. Installing or changing the batteries ......................47 5.9.3. UNE ZHERO - AC Connection to the Distributor grid/Genset – “Backup” ..........50 5.9.4. Connecting the production meter ......................54 5.9.5. Meters connection ........................... 56...
Page 3 STARTING THE MACHINE ............................. 72 6.1. Turning the system on ............................ 72 6.2. Checking the correct operation of the system ....................74 6.2.1. ZHERO Installer Tool ..........................75 SYSTEM OPERATION ............................. 76 7.1. Recommendations for optimal Monofase use ....................76 7.2. Monitoring ..............................78 7.2.1.
Page 4 Batteries maintenance ..........................115 10.2. Controller maintenance ..........................117 10.3. Inverter maintenance ..........................118 10.4. System update ............................119 DISPOSAL ................................ 121 ANNEXES ................................. 122 System alarm and error table ..........................123 MANUALS ATTACHED TO UNE ZHERO ........................128 Page: 3...
Page 5: Information About This Document
Please keep in mind that UNE ZHERO can be used only by those who have read and understood this manual in its entirety; if in doubt, please contact your supplier for clarification.
Page 6: Warranty And Supply Conditions
Also, UNE srl disclaims all liability for damage in the event of failure to comply with the Monofase for proper installation in force in the country where the machine is installed.
Page 7: Symbols Used
This symbol marks a chapter intended to be read by the installers of UNE ZHERO. This symbol marks a chapter intended to be read by the maintenance technicians of UNE ZHERO. This symbol marks a chapter intended to be read by the end user of UNE ZHERO. Page: 6...
Page 8: Symbols Affixed To The Frame Of Une Zhero
This symbol prohibits the use of water to extinguish fires. This symbol represents the operating range of the system; for UNE ZHERO it extends from -10 to + 40 °C. This symbol indicates a danger of electric shock; before carrying out any other operation, turn off the device and wait for the indicated time before proceeding.
Page 9: Glossary And Definitions
The person who, after appropriate training, has the skills and the ability to work on UNE INSTALLER ZHERO. INVERTER An inverter is an electronic equipment that converts direct current into alternating current.
Page 10 Function that allows in case of a blackout by the distributor network to keep one or more BACKUP lines in your home powered. WORKING MODE UNE ZHERO working mode; depending on its programming, it can be Off-Grid, On-Grid with backup. PROTECTION INTERFACE System for disconnecting the photovoltaic system in the event of network anomalies (SPI or NS protection).
Page 11 Definitions EXPANSION A system is considered expanded when at least one circuit is added INSTALLATION Installation means the construction of a system from scratch or the complete reconstruction of an existing system. TRANSFORMATION An electrical system is considered transformed if subjected to significant changes, such as an increase in power.
Page 12: Recipient Qualifications
The persons working on UNE ZHERO must wear the personal protective equipment required by the laws in force in the country where the device is installed. Prior to the commissioning of UNE ZHERO, the installer shall provide the user with all the information necessary for its proper use, including: •...
Page 13 User Prior to the commissioning of UNE ZHERO, the users shall receive from the installer appropriate notions such • Instructions about the hazards associated with the use of electrical devices;...
Page 14: Conditions Of Use
UNE ZHERO is intended for use in residential, commercial and industrial environments, in 230V (single phase) – 50 Hz TT and TN-S. UNE ZHERO is designed to collect the direct current produced by a suitably sized photovoltaic system, store it and convert it, when needed, into alternating current, which can be used by the appliance.
Page 15 Do not use UNE ZHERO without making the necessary ground connections. • Changing the operating parameters of UNE ZHERO is forbidden; every change must be agreed upon with the local distributor, in compliance with the laws, especially in the case of On-Grid systems.
Page 16: Une Zhero Characteristics
Once correctly sized according to your needs and installed, UNE ZHERO will provide the necessary energy to the electrical appliances. UNE ZHERO can work in different modes depending on the requirements of the customer and of the place of installation; some of the working modes are not available in some countries.
Page 17 UNE ZHERO Monofase UNE ZHERO Off-Grid Internal controller MPPT; Internal controller MPPT; External grid inverter not supported; External grid inverter not supported; UNE Internal inverter; UNE internal inverter; Exchange meter; No exchange meter; No production meter; No production meter; Backup line;...
Page 18 In the latter case, the system will resume normal On-Grid operation. UNE ZHERO comes with a transfer-to-grid feature that can be enabled in accordance with the local regulations in force in each country; this function allows transferring the excess energy produced by the photovoltaic system to the grid.
Page 19 Since there is no other power grid working in parallel with UNE ZHERO, the only power available to the user is that provided by UNE ZHERO (the amount of power available varies depending on the availability of the photovoltaic module and of the battery and can reach a maximum of 6 kW).
Page 20: Wiring Diagram
The wiring diagram and the corresponding connection terminal block are described in cap. 5.7 3.3. Technical data Installer Maintenance User technician The technical data of UNE ZHERO can be found in the technical datasheet. 3.4. UNE ZHERO nameplate Installer Maintenance User technician...
Page 21: Safety Warnings
Always keep the safety instructions and the manuals supplied with UNE ZHERO at hand. UNE srl disclaims all liability in the event of failure to comply with the Standards for proper installation and is not responsible for the state-of-the-art execution of the systems upstream or downstream of the supplied equipment.
Page 22 Maintenance technician UNE srl disclaims all liability in the event of failure to comply with the Standards for proper maintenance and is not responsible for the correct maintenance of the systems upstream or downstream of the supplied equipment. The customer must inform the maintenance technician of any fault or malfunction found while using the equipment.
Page 23 UNE srl has designed the product to eliminate, as far as possible, any sharp edges and parts. This objective could not be achieved on all UNE ZHERO parts; therefore, the authorised installed must wear personal protective equipment, in accordance with the regulations in force in the country where the device is installed.
Page 24: Personal Protection
Machine off; access to the system is allowed only after 20 minutes from the cut-off. The “open casing” operations to be conducted on UNE ZHERO shall be performed only by authorised staff.
Page 25: System
UNE ZHERO IS NOT designed to power life-support medical devices. Do not use UNE ZHERO in systems where a power outage may cause damage to persons. UNE ZHERO contains hazardous currents and voltage. Full contact protection ensured only by observing the instructions for use and only if: •...
Page 26 The "Residual Current Detection" or RCD is guaranteed by the isolation control with which it is equipped UNE ZHERO and visible in the top right panel disconnectors, in case of alarm activation the inverter can continue to operate safely; However, you should contact your installer to verify what is the cause of such a report.
Page 27: Residual Risks
If the maintenance technician observes any safety deficiency that exceeds his competence (e.g., ventilation obstructions, changes to systems outside UNE ZHERO that may imply serious risks to persons), he must report it in writing, highlighting the need to remove it.
Page 28: Installation
5.1. Lifting and transport Installer UNE ZHERO is a large heavy product that requires particular attention during lifting, transport, and handling, in such a way as to avoid any damage to persons and property. Transport shall be carried out with adequate equipment, since UNE ZHERO contains parts that are sensitive to impact, vibrations, etc.
Page 29 The lifting equipment used must be able to withstand the weight of the device, over 350 kg. Considering the weight and the overall size of UNE ZHERO, it is necessary to contact specialist staff for its transport, handling, loading, and unloading.
Page 30: Tools Required For Installation
5.2. Tools required for installation Installer Maintenance technician Fuses GPV 1000Vcc Set of slotted and crosshead screwdrivers Current clamp Set of hex keys Set of wrenches Hydraulic hand pallet truck Page: 29...
Page 31: Environmental And General Installation Conditions
Moreover, please keep in mind that: • UNE ZHERO can be used only indoors, in environments suitable for IP20 equipment; do not install the device in inadequate environments or subjected to adverse weather conditions; • Do not expose UNE ZHERO to direct sunlight;...
Page 32: Une Zhero Positioning
On floors that can withstand the weight of UNE ZHERO. Also, please ensure a clearance of 50cm above and 30 cm around UNE ZHERO for proper ventilation. UNE ZHERO must be fixed to the ground using the holes available on the baseplate to avoid any overturning.
Page 33: Unpacking
Now cut the strapping seals; c) At this point you should be able to remove the carton from UNE ZHERO; d) If delivered on pallets, use a hydraulic pallet truck suitable for the weight of the system to lift it and place it in the exact installation position.
Page 34: Preliminary Operations Before Proceeding To Electrical Connection
5.6. Preliminary operations before proceeding to electrical connection Installer In order to facilitate the installation and maintenance of ZHERO it is possible to disassemble all the external painted panels of the ZHERO system, except for the rear one, which gives a considerable resistance to diagonal deformation.
Page 35 The modules chosen according to the instructions above must be connected in such a way as to allow their correct operation with UNE ZHERO, as indicated below. The strings connected to each MPPT must be identical, have the same orientation and tilt angle.
Page 36 In the event of a fault during this check, suspend all operations until the problem is solved to avoid any hazardous situation or damage to persons and property. UNE ZHERO is equipped with an insulation resistance check. If the insulation resistance drops below 50 kΩ, the system immediately warns you by flashing the operating light.
Page 37 This section of the system must be installed by an electrician (a specialist in the electrical field) using the switch available on UNE ZHERO, in compliance with the regulations in force in the country where the device is installed.
Page 38 Pay attention to all operations and follow the rules in the dedicated chapter. Further design guidelines The designer and the installer of the system into which UNE ZHERO is incorporated, must check, each within his own competence and in accordance with the regulations in force at the place of installation, the following: •...
Page 39: General Connection Diagram Of The Machine
5.7. General connection diagram of the machine Installer The general connection diagram of the system is shown below, if further information is required, please directly contact UNE srl (info@unesrl.com). Figure 5 – Block diagram of UNE ZHERO Page: 38...
Page 40 Figure 6 - Block diagram UNE ZHERO in the Off-Grid connection Page: 39...
Page 41 Figure 7 - Block diagram of UNE ZHERO Retrofit Page: 40...
Page 42 Figure 8- Block diagram of UNE ZHERO UNE ZHERO Ibrido Page: 41...
Page 43: Internal Overview And Overview Of The Zhero Panel
ZHERO panel UNE ZHERO panel. More details later on this section. Terminal block Connection system between UNE ZHERO and the production meter, the generator/grid input, and the appliance. Natural fan System of slits that favours the natural cooling by limiting the intervention of the main fan as much as possible.
Page 44 “ZHERO panel” representation with descriptions Figure 10 - Representation of the ZHERO panel ISOL Electrical insulation control. Differential magnetothermic in output from the inverter, it does not cause the interruption of the user but the block of the supply from the battery + photovoltaic source.
Page 45: Connection Description
After performing the preliminary checks described in the previous paragraphs, connect UNE ZHERO to the PV generator. The Cables outside UNE ZHERO, i.e., not protected by its enclosure, must be fitted with firmly secured ducts with a degree of protection suitable for the place of installation.
Page 46 To connect the strings to the string boards, break through the pre-scored knockout holes on the right side of UNE ZHERO. Figure 11 - Detail of the passage of cables and connectors at the entrance to the UNE ZHERO system The plate must be removed by unscrewing the appropriate screws.
Page 47 For the connection, use only connectors compatible with this power and 6 or 10 mmq cables for photovoltaics with double insulation. Do not connect or disconnect the connectors under load and / or with the UNE ZHERO switched on. Page: 46...
Page 48: Installing Or Changing The Batteries
100 kg, and it cannot be handled by hand. UNE ZHERO is normally delivered with the batteries already installed. However, in some countries, it might be necessary to transport them separately. In this case, the installation should be performed as follows: a) Remove the top panel and battery panel.
Page 49 Once positioned, screw the battery to the fixing tabs. Tabs Figure 15 – UNE ZHERO detail d) Refit the side parts and close the battery panel. e) Connect the batteries with the inverter (pay attention to polarity) and RJ-45 cable to corresponding connectors.
Page 50 Figure 16 - UNE ZHERO inverter box Power connector (first battery Power connector (negative BA0 – second battery BA1) above– positive below) Page: 49...
Page 51: Une Zhero - Ac Connection To The Distributor Grid/Genset - "Backup
5.9.3. UNE ZHERO - AC Connection to the Distributor grid/Genset – “Backup” Installer UNE ZHERO all models The breakthrough holes for the passage of the AC cables, any signals and data are located along the bottom plate on the right side of UNE ZHERO.
Page 52 – Terminal block AC side Figure 18 The terminal block is just below the ZHERO panel as you open the front casing. In sequence, starting from the right of the reader: Connection of the distributor network/generator in input to the system (not production meter): •...
Page 53 • Power: at least 15% more powerful than the maximum power required. If the frequency or voltage values exceed these ranges, UNE ZHERO might disconnect itself automatically from the EG (genset) as a protection mechanism. b) If the “ON GRID” Working Mode is enabled, it will be managed as a public grid input (to which the system will be connected).
Page 54 Yellow-Green for earth. The cables outside UNE ZHERO, i.e. not protected by its enclosure, must be fitted with firmly secured ducts with a degree of protection suitable for the place of installation, in accordance with the regulations in force at the place of installation.
Page 55: Connecting The Production Meter
In many cases, this meter cannot be incorporated into the system because it must be controlled and supplied by the local distributor. UNE ZHERO can be equipped with such a device; please follow the procedure below for its installation: Figure 20 - UNE ZHERO main switch panel a) Turn off UNE ZHERO using “ON-OFF”...
Page 56 The fig. below shows an example diagram. Inverter side Grid side Figure 21 - Meter “in-out” diagram The “in-out” shall be installed following the rules in this manual, in compliance with the regulations in force at the place of installation, also respecting the requirements of the local distributor installing the meter.
Page 57: Meters Connection
Figure 22 – Une ZHERO supported meters For the UNE ZHERO Retrofit and Ibrido configuration, the Meters present will be one exchange and one production, the connection order in communication via RJ-45 is indifferent (terminator must be inserted on the last device) but the two devices must not be exchanged between them.
Page 58 Distributor line connection Warning: the meter is a single-phase 230V device with a maximum current of 100A. Warning: in the case of three-phase systems, each ZHERO system must have its own meter. Attention: in case of three-phase systems, install the meter along the same line in which the ZHERO system is connected.
Page 59 Figure 24 – EM112 Production meter connection Attention: the meter will only be able to measure the energy produced upstream, everything that will be connected downstream will not be measured by UNE ZHERO. Connection of the 485 communications Use an Ethernet cable of category 5e or higher, if it passes next to power cables or underground, use an adequate degree of shielding;...
Page 60 Figure 25 – Meter connection detail Meter connection “WAT” The other end of the cable must be connected to the screw terminals of the meter which are located under a removable plate as shown in the figure: Figure 26 - Terminal block for connection to the EM112 meter •...
Page 61 "- " with "- " and "+ " with "+ ". To check correct installation, once the meter is powered and the UNE ZHERO system is turned on, make sure that the RX TX symbol is shown on the meter display in the lower right corner: Figure 27 –...
Page 62 The following are the 485 communication connection diagrams with exchange meter and exchange and production meter: Monofase configuration: Exchange meter only Figure 28 – EM112 Exchange meter RJ-45 connection Ibrido and Retrofit configurations: Exchange meter and production meter: Figure 29 – EM112 Production and Exchange meter RJ-45 connection Page: 61...
Page 63 Distributor line connection Warning: the meter is a single-phase 230V device with a maximum current of 100A. Warning: in the case of three-phase systems, each UNE ZHERO system must have its own meter. Attention: in case of three-phase systems, install the meter along the same line in which the UNE ZHERO system is connected.
Page 64 Figure 31 – ET112 production meter connection Attention: the meter will only be able to measure the energy produced upstream, everything that will be connected downstream will not be measured by UNE ZHERO. Connection of the 485 communications Use an RJ-45 FTP cable of category 5e or higher, if it passes next to power cables or underground, use an adequate degree of shielding;...
Page 65 Make a jumper between pins 3 and 5 of the meter (only on the last device). Attention: Each Meter must be connected exclusively to your UNE ZHERO and eventually to the other meter (of the same meter), never to other devices even if in series.
Page 66 To check correct installation, once the meter is powered and the UNE ZHERO system is turned on, make sure that the RX TX symbol is shown on the meter blink: Figure 34 – Detail confirmation of the ET112 meter communication or check it using the specific ZHERO Installer Tool software.
Page 67 The connection cable of the meter to the system must not exceed 50 meters in length. It is forbidden to connect to the same Metro 2 different ZHERO. Do not install more than one three-phase meter in series or in parallel.
Page 68 The installation of UNE ZHERO on one electrical phase rather than another does not involve any difference in the operation. WARNING: DO NOT use the output phase of UNE ZHERO for the three-phase network backup function. The backup line must be exclusively connected to single-phase loads.
Page 69 Make a jumper between pins 7 and 9 of the meter (only on the last device). Attention: Each Meter must be connected exclusively to your UNE ZHERO and eventually to the other meter (of the same ZHERO), never to other devices even if in series.
Page 70 To check correct installation, once the meter is powered and the UNE ZHERO system is turned on, make sure that the RX TX symbol is shown on the meter display in the lower right corner: Figure 41 – Detail confirmation of the meter communication or check it using the specific ZHERO Installer Tool.
Page 71: Internet Connection
The ethernet cable outgoing from the system must be taken directly to the router or to a network switch connected to it as shown in the figure: Figure 45 – Render connection of UNE ZHERO to the ROUTER Page: 70...
Page 72 If this connection is not possible, you will need to use a WIFI-REPEATER configured as a Range extender of your network. Figure 46 - Render connection of UNE ZHERO to the ROUTER via range extender No specific features are required for this device, it is still recommended to purchase a mid-range product, which supports the mesh network, dual band 2.4 and 5 GHz and with an antenna powerful enough to reach the...
Page 73: Starting The Machine
6. STARTING THE MACHINE Installer Maintenance technician Before turning the system on, the installer must send photos of the connections made and report the start of the system to assistance: assistenza@unesrl.com. 6.1. Turning the system on Maintenance Installer technician Check mains voltage (230V) on terminals LG – NG; Verify that the production and exchange counters are enabled;...
Page 74 (always less than 1 kW); once the Warmup phase is finished, production will reach normal levels. • If the machine fails to start without the photovoltaic system, turn it off and contact UNE technical support. Page: 73...
Page 75: Checking The Correct Operation Of The System
Installer technician After the first system start-up, it is necessary to check the correct installation using the ZHERO Installer TOOL software. The Warmup state will be active until Warmup is complete, at which time the system will begin normal operation.
Page 76: Zhero Installer Tool
Installer Technician The program is necessary in order to verify the correct installation of the UNE ZHERO system since the verification of the correct installation is not provided by UNE operator but must be contacted only in case of a serious anomaly.
Page 77: System Operation
Recommendations for optimal Monofase use User This section contains useful tips to make the most out of your UNE ZHERO. With just a few tricks, you will be able to consume in a “smart” way, saving energy without giving up your own comforts.
Page 78 These are some recommendations for optimal use; the system will work normally even if the battery runs out. Also, the battery installed on UNE ZHERO has a high capacity; most likely, even if high energy-consuming appliances (ovens, washing machines, etc.) were run during the night, the battery would still not run out.
Page 79: Monitoring
Based on this philosophy, you should start using all your household appliances (iron, vacuum cleaner etc), making sure that you have chosen the UNE ZHERO model with the battery capacity that best suits your needs, in such a way that it is enough to cover the electricity demand during night-time also.
Page 80 This section displays all the customers of the retailer, together with their unique identification codes (the first column) and the number of devices owned (the last column). Click on Code to view the customer master data, section that can be edited and updated, as shown in the figure below: Figure 49 - Customer master data Click on the device to check all the devices paired with each of the customers included in the database.
Page 81 Figure 51 - Device dashboard This screen displays the device type (S3 or S6), whether the system is running or in standby, whether the battery is charging/discharging, all device data and any pending reports. System status: Press the gear button on the “Device dashboard” screen to open the system status screen that consists of four sub-screens.
Page 82 (where applicable) and the state of charge of the battery. Regardless of the operation carried out on the Webserver, by clicking on the ZHERO logo at the top of the screen you will return to the home screen.
Page 83 This screen shows: • The battery charge percentage (percentage of charge and, in a smaller font size, the Ah and kWh stored). • The photovoltaic production, expressed as a percentage (in a smaller font size, the ideal one and the actual one, both expressed in kWh).
Page 84 Lastly, the last page, the Ethics page. Figure 56 - ETHICS summary page, displaying information since the system was installed This page monitors, for purely indicative purposes, the environmental benefits of self-consumption compared to traditional consumption. Event details On this page is displayed a chart (with configurable fields) that provides information about the operation of the device.
Page 85 Choose a time interval for which to display data and select the values to be included in the chart (use the buttons to the right of the chart). The table below shows the last readings made by the Device Server. It is also possible to download an Excel with the last data, should you wish to make custom analyses.
Page 86 To pair the device with the customer, simply enter the “customer code” and the “activation code”; obviously, both of them will also be linked to the retailer who registered them. List of devices: Figure 60 - Paired device control screen In this section can be viewed and monitored all the devices installed by the retailer;...
Page 87 Password change: Figure 62 - Password change screen Enter the old password to change it with a new one. Exit: To exit the webserver and perform a Logout Page: 86...
Page 88: Webapp
7.2.2. Webapp User To monitor the system, the user must have a valid Internet connection and a device capable of connecting to the network. The portal is a web application that displays pages in html5 + JavaScript language. In order to take full advantage of all the features, please use a browser of the latest generation. Especially, DO NOT disable the JavaScript language in the browser used.
Page 89 Figure 64 - Registration request message If the registration was successfully submitted, the following window will appear: Figure 65 - Registration request received message You will receive a mail similar to the one shown below on the address indicated in the registration phase;...
Page 90 Figure 66 - Customer registration request received mail The user will be prompted to set a password in the screen shown below. Set a password: Figure 67 – Password setup window Enter a password of at least 10 characters and click “Proceed”. At this point, the following screen will be shown: –...
Page 91 The customer must pair the device using the unique identification code received with UNE ZHERO. This can be done by clicking on: Devices -> pair device: Figure 69 - Customer device pairing code input Click on “Pair Device”; if the operation is successful, the following screen is displayed: Figure 70 - Customer device pairing The device can be paired with one customer only;...
Page 92 After correctly entering the mail/username, password and the device pairing code, the user will be redirected to the following screen: Figure 72 - Home screen on browser Figure 73 - Home screen on a mobile device From this screen (starting from the top) it is possible to check whether the device is on or off, if there are any pending alarms, whether there is any extra energy available to power the privileged loads (where applicable) and the state of charge of the battery.
Page 93 Regardless of the operation carried out on the Webserver, by clicking on the ZHERO logo at the top of the screen you will return to the home screen. Scroll from right to left to view the following screens: Figure 74 - UNE ZHERO energy flow screen This screen shows: •...
Page 94 On the next screen: Figure 75 - Summary screen of the system daily energy flows • daily kWh consumed by the user (kWh). • daily kWh taken from the grid (kWh). • daily kWh taken from the OG (kWh). • daily kWh exported to the grid (kWh).
Page 95 The Ethics page Figure 76 - ETHICS summary page, displaying information since the system was installed This page monitors, for purely indicative purposes, the environmental benefits of self-consumption compared to traditional consumption since the moment when the device was first switched on. Devices: List of devices: This screen displays all the devices that the customer has purchased and paired.
Page 96 Pair a device Figure 79 - Device pairing screen To pair your UNE ZHERO device(s), enter the activation code(s) supplied with the device(s). You will not be able to view the status of the system(s) unless the step above is performed.
Page 97 The edit section can be used to enter all personal data; this will help UNE srl finding the necessary information, as needed. The code cannot be modified since it is used by UNE srl as a unique identified of the customer.
Page 98 Set a new password Figure 82 - Password change screen This section allows changing the password by simply entering first the old one and then the new one twice. Logout Click on Logout to stop the connection with the webserver and exit the site; the system will return to the portal login page.
Page 99: Une Zhero Functions
7.3. UNE ZHERO functions Installer Maintenance User technician 7.3.1. “Monofase” function Installer Maintenance User technician The system is designed to primarily supply energy to user in this order: 1- Photovoltaic energy 2- Battery energy 3- Grid energy Normally, the system tries to power the user through photovoltaic energy which, if absent or insufficient, is compensated by the battery;...
Page 100: Photovoltaic Energy Management
User technician In the case of users not connected to the “backup” line, any disruption can in no way be caused by the UNE ZHERO storage system. In the case of users connected to the “backup” line (if provided), it can be verified whether: or the network does not fall into the legal parameters, or a shortage of the distribution grid has occurred, and the battery is excessively discharged to deliver.
Page 101: Warmup, Battery Charging And Discharging
7.3.7. Warmup, battery charging and discharging Installer Maintenance User technician The battery, completely cold, can take up to 14 hours to become operative; this operation is performed exclusively as a result of: • Power on; • System restart; • Excessive discharge in the absence of the distribution grid. once it comes operative, except for anomalies, the system will no longer shut it down.
Page 102: Off-Grid Operation
Installer Technician User If UNE ZHERO is working Off-Grid, the ways in which it can work vary and the exact configuration must be discussed and validated together with the UNE contact. It is possible to set the system so that: 1.
Page 103: Security Checks
To carry out the test, simply press and hold the TEST button on the "ISOL" insulation control module on the main panel for "10 seconds". Figure 83 – ZHERO Panel The system main alarm lamp will flash 3 times in sequence followed by 1 second pause and 3 flashes again;...
Page 104: Differential Circuit Breaker Of The Machine
Differential circuit breaker of the machine Installer Technician User To verify the correct functioning of the lifesaving device on board of ZHERO it is necessary: • Disconnect as many loads as possible from the house; • Disconnect the photovoltaic system;...
Page 105: What To Do In The Event Of A Failure Or Error
8. WHAT TO DO IN THE EVENT OF A FAILURE OR ERROR User This section contains instructions on what to do in the event of an UNE ZHERO failure. There are two types of system failure and/or error: • The first type can be easily identified and solved directly by the user.
Page 106 • Sending mail to user and/or installer By registering on the portal and entering a valid email, you can enable the reception of alarms activated on the system. The following is an example of the alert. Page: 105...
Page 107: Most Common Anomalies
8.2.1. Low insulation resistance User If the insulation resistance control system of UNE ZHERO detects a leakage to earth from one of the two poles of the electrical system, it will: a) Immediately send a text message and an email to the user, notifying him about the earth leakage current.
Page 108: String Error
8.2.2. String error User If a string stop supplying current during normal operation of UNE ZHERO, a significant reduction in photovoltaic production should be noted. Failure reasons A string may stop supplying current if there is a physical circuit failure, (a connector, a fuse, etc).
Page 109: Controller Error
User In the event of an inverter error, UNE ZHERO will no longer be able to supply power neither from the generator nor from the battery; in the most severe cases, it will not even be able to remain connected to the local distributor grid (for On-Grid systems) or to the backup generator (for Off-Grid systems), along the “backup”...
Page 110: Ethernet Communication Error
It is an issue that can occur with some service providers who may confuse UNE ZHERO’s data exchange as spam and slice communication. Not being systemists and not dealing with the customer’s internet networks unfortunately we cannot intervene directly to solve the problem and you need to contact the service provider.
Page 111 Connect UNE ZHERO to another network and check if from there the communication resumes (wait at least 30 minutes), at that point the hardware problem of UNE ZHERO would be definitively excluded. (Hotspot with mobile phone to a Wi-Fi repeater with RJ port connected directly to UNE ZHERO for example).
Page 112: System Bypass
8.2.7. System bypass User In the event of a critical malfunction of UNE ZHERO, first of all, contact your installer; he will check the device by means of the internal monitoring system connected to your UNE ZHERO. If there is no possibility of an immediate recovery, it is possible to exclude UNE ZHERO by manually switching on the distributor’s network via external diverter that the installer must predict in case of...
Page 113: Failure To Connect To The Distributor / Generator Network
If the system does not connect to the generator, it is possible that the voltage or frequency are out of the ranges accepted by UNE ZHERO, see chap. 5.9.3 It is advisable to check the generating set is functioning correctly.
Page 114: Technical Support
Date and time indicative of the event; • A description ad detailed as possible of the event/problem. Once the email has been sent, UNE will receive the request for assistance and an operator will take care of responding in the shortest possible time. Page: 113...
Page 115: Maintenance And Update
Inverter • System update To open the casing of UNE ZHERO, use a crosshead screwdriver a n°5 Allen wrench. The system consists of 5 panels that close it completely. They are all removable except for the rear one. Box fixing screws Figure 85 –...
Page 116: Batteries Maintenance
Wait for 20 minutes before carrying any operation with the casing open. Specific operations: • Remove the “main carter”; • Remove the “battery carter”; • Disconnect the RJ-45 connectors from the ZHERO panel shown in the figure on the right; Page: 115...
Page 117 Figure 87– Position of battery plug and RJ-45 connectors • Disconnect the battery plugs as shown in figure above on the left side; • Remove the battery anchoring screws to the brackets figure below; Figure 88– Position of the battery anchoring brackets •...
Page 118: Controller Maintenance
Remove the “main carter”; • Remove the “battery carter”; • Disconnect the 485-connector located on the ZHERO panel as shown below; • Disconnect the power plugs on the left side. Figure 90– 485 connector and position of the power plugs •...
Page 119: Inverter Maintenance
• Remove the “inverter lid”; • Disconnect all connections at the ZHERO panel (may vary depending on the system configuration); • Remove the front panel with the inverter fan by disconnecting the power connector of the fan: Figure 92 – Position of power connectors, data plug and system terminal block •...
Page 120: System Update
The system is updated to correct any bug found or to adapt the system to changes in regulations. Usually, the system update procedure is carried out remotely via Internet by UNE, notified to the customer via email. To make the changes effective, simply restart the system.
Page 121 Load the provided firmware; • Close the casings; • Turn the system on. At this point the system is updated, it will be possible to check the update on ZHERO Installer Tool or via webserver on the device page (for installer). Page: 120...
Page 122: Disposal
UNE srl is registered with COBAT (National Waste Collection and Recycling Association) for the disposal of electrical waste. At the end of its life cycle, UNE ZHERO must be stored and disposed of in accordance with the regulations in force in the country where it is installed.
Page 123: Annexes
12. ANNEXES Installer Maintenance User technician Page: 122...
Page 124: System Alarm And Error Table
The ambient temperature in which the ZHERO All the necessary precautions must be taken so that the ambient system is installed is out of range. temperature of the system in which ZHERO is located remains in the range - ALL_T_AMB_OUT_OF_RANGE 10 + 40 ° C.
Page 125 EMPTY EMPTY EMPTY EMPTY EMPTY EMPTY Power supplied by the battery reduced due to Consider improving the ventilation of the room where the ZHERO is ALL_INV_DERATING the high temperature of the inverter. installed. Probable inverter breakdown. contact: assistenza@unesrl.com. ALL_INV_FERMO_BLOCCO Page: 124...
Page 126 50A. START Generic startup error Contact assistenza@unesrl.com only if the problem persists communication between ZHERO and Check that ZHERO and Meter are powered, check integrity and correct EXT_COM Exchange meter is broken connection of the cables Communication between ZHERO and...
Page 127 Page: 126...
Page 128 Page: 127...
Page 129: Manuals Attached To Une Zhero
• Battery Manual; • Certificate of maintenance; • Datasheet. UNE SRL - VIA MODENA 48/E – 42015 CORREGGIO (RE) - ITALY - VAT No. 02513460358 – T.+39 0522 693566 – F. +39 0522 1483326 – INFO@UNESRL.COM - HTTPS://WWWUNESRL.COM Page: 128...

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