Aurora TRIO-20.0-TL-OUTD-US User manual

THE MANUAL: TRIO-20.0/27.6-TL
Model Number: TRIO-20.0-TL-OUTD-US
TRIO-27.6-TL-OUTD-US

AURORA® TRIO
Photovoltaic Inverters
TRIO-20.0/27.6-TL US
Technical Manual

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Copyright © 2013 Power-One Renewable Energy Solutions LLC. All rights reserved. No part of this
document may be reproduced in any form or by any means without the prior written permission of
Power-One Renewable Energy Solutions LLC. Power-One Renewable Energy Solutions LLC makes
no representations, express or implied, with respect to this document or any of the equipment
and/or software it may describe; including (without limitation) any implied warranties of utility, or
merchantability for any particular purpose. All such warranties are expressly disclaimed. Power-
One Renewable Energy Solutions LLC, its subsidiaries, affiliates, distributors and dealers shall not
be liable for any indirect, special, incidental, or consequential damages under any circumstances.
Power-One Renewable Energy Solutions LLC reserves the right to make changes to this document
without notice and shall not be responsible for any damages, including indirect, special, incidental
or consequential damages, caused by reliance on the content presented, including, but not limited
to, any omissions, typographical errors, arithmetical errors or listing errors. All trademarks, logos,
trade names, service marks and copyrighted materials used in this document are the property of
their respective owners. Failure to designate a mark as registered does not mean that such mark is
not a registered trademark. The Power-One name and logo are registered trademarks of Power-
One, Inc. in the U.S.A. and other countries. All rights reserved. No licenses are conveyed herein,
implicitly or otherwise, under any intellectual property rights.
Power-One
Renewable Energy Solutions LLC
740 Calle Plano
Camarillo, California, 93012
United States
YOUR WKtZͲKEDISTRIBUTOR
SOLIGENT
800-967-6917
www.soligent.net

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Contents
PART 1 INTRODUCTION & SAFETY .............................................................................................................................4
1.1 INTRODUCTION ......................................................................................................................................................................... 5
1.2 SAFETY ........................................................................................................................................................................................... 7
PART 2 UNPACK AND SELECT INSTALLATION LOCATION ..............................................................................16
2.1 GENERAL CONDITIONS ........................................................................................................................................................17
2.2 SELECT THE INSTALLATION LOCATION......................................................................................................................20
PART 3 MOUNTING AND WIRING .............................................................................................................................23
3.1 AVAILABLE VERSIONS..........................................................................................................................................................24
3.2 GRAPHICAL REPRESENTATION OF TRIO ....................................................................................................................26
3.3 WALL MOUNTING ...................................................................................................................................................................27
3.4 WIRING DETAILS.....................................................................................................................................................................29
3.5 SETTING THE COUNTRY STANDARD AND LANGUAGE.........................................................................................53
PART 4 OPERATION GUIDE.........................................................................................................................................54
4.1 GENERAL CONDITIONS ........................................................................................................................................................55
4.2 MONITORING AND DATA TRANSMISSION ..................................................................................................................55
4.3 DISPLAY AND KEYPAD..........................................................................................................................................................56
4.4 COMMISSIONING .....................................................................................................................................................................61
4.5 DESCRIPTION OF THE MENUS ..........................................................................................................................................65
PART 5 TROUBLESHOOTING GUIDE........................................................................................................................72
5.1 GENERAL CONDITIONS ........................................................................................................................................................73
5.2 ALARM MESSAGES AND DISPLAY CODES....................................................................................................................73
5.3 THE POWER 0NE SERVICE CALL......................................................................................................................................82
PART 6 MAINTENANCE GUIDE...................................................................................................................................83
6.1 GENERAL CONDITIONS ........................................................................................................................................................84
6.2 ROUTINE MAINTENANCE ...................................................................................................................................................85
6.3 OTHER MAINTENANCE ........................................................................................................................................................85
6.4 CR2032 BATTERY REPLACEMENT .................................................................................................................................86
6.5 STORAGE AND DISMANTLING ..........................................................................................................................................87
PART 7 APPENDIX..........................................................................................................................................................88
7.1 TECHNICAL DATA ...................................................................................................................................................................89
7.2 FIELD ADJUSTABLE TRIP LIMITS FOR VOLTAGE AND FREQUENCY ...........................................................103
7.3 MPPT CONFIGURATION EXAMPLES............................................................................................................................104
7.4 ENVIRONMENTAL SENSORS...........................................................................................................................................106
7.5 PROTECTIVE DEVICES WITHIN THE AURORA INVERTER ...............................................................................109
7.6 STRINGS AND ARRAYS.......................................................................................................................................................110
7.7 FCC REMARKS........................................................................................................................................................................112
7.8 INDEX OF TABLES AND FIGURES..................................................................................................................................113

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PART 1 INTRODUCTION & SAFETY

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Part 1 Introduction and Safety
1.1 INTRODUCTION
SAVE THESE INSTRUCTIONS. This manual contains important instructions for models indicated
on the front cover that shall be followed during installation and maintenance of the inverter.
1.1.1 PURPOSE
The purpose of this document is to support the qualified technician, who has received training
and/or has demonstrated skills and knowledge in construction, in installing and maintaining this
Power-One AURORA® TRIO Photovoltaic (PV) Inverter. This manual does not cover any details
concerning equipment connected to the inverter such as the solar modules. Information
concerning the connected equipment is available from the respective manufacturer.
1.1.2 INSTALLATION
The installation is to be done by a qualified installer, normally a licensed electrician or contractor,
according to the applicable local code regulations (National Electric Code (NEC), Canadian Electric
Code (CEC), and other).
1.1.3 MAINTENANCE AND SERVICE
Maintenance and service procedures must comply with the manufacturer's documentation. For
more detailed information, see Maintenance, Part 6. Call Power-One Customer Service at 877-261-
1374 for a list of qualified service contractors.
1.1.4 FIGURES AND IMAGES IN THIS MANUAL
The photos in this manual may differ slightly from the final model shipped and the color of the
components may not match those illustrated; however the information is still applicable.

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Part 1 Introduction and Safety
1.1.5 STORAGE OF THIS INFORMATION
Keep this document in a safe place near the AURORA TRIO Inverter for easy access during
installation and maintenance. It must be accessible for approved service and maintenance
personnel at any time.
1.1.6 ADDITIONAL INFORMATION
More information on Power-
One’s AURORA
TRIO Inverter can be found at www.power-
one.com.

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Part 1 Introduction and Safety
1.2 SAFETY
IMPORTANT SAFETY INSTRUCTIONS!
SAVE THESE INSTRUCTIONS – KEEP IN A SAFE PLACE!
1.2.1 WARNINGS IN THIS DOCUMENT
This is a list of special safety symbols used in this manual that highlight potential safety risks
and/or useful information. The symbol usage is described below:
Symbol
Usage
DANGER:
Indicates a hazardous situation that can result in deadly electric shock hazards,
other serious physical injury, and/or fire hazards.
WARNING:
Indicates directions which must be fully understood and followed in their entirety
in order to avoid potential safety hazards including equipment damage or personal
injury.
CAUTION:
The reader should stop, use caution and fully understand the operations explained
before proceeding.
WARNING
DANGEROUS VOLTAGE
The product works with high voltages. All work on the AURORA Inverter must
follow the described documentation and must comply with all prevailing codes and
regulations associated with high voltages.
WARNING
HOT TEMPERATURE
Some surfaces may become hot; do not touch the product while it is in operation.
UL1741 Standard for Safety for Inverters, Converters, Controllers and
Interconnection System Equipment for use with Distributed Energy Resources.
CSA-C22.2 No. 107.1-01 - General Use Power Supplies.
THE INSTALLER MUST READ THIS DOCUMENT IN ITS ENTIRETY BEFORE INSTALLING OR
COMMISSIONING THIS EQUIPMENT.

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Part 1 Introduction and Safety
1.2.1.1 Equipment Safety Warnings
In addition to the safety and hazard symbols, the following symbols are also used in this installation
guide:
System earth conductor (main grounding protective
earth, PE)
Alternating Current (AC) Value
Direct Current (DC) Value
ø
Phase
Grounding (earth)
The equipment has various labels. Those with a yellow background refer to safety concerns. Be sure
to read all labels before beginning installation of the equipment. If any questions arise as to the
meaning or intent of these notices, please contact Power-One Technical Support at 877-261-1374.
1.2.1.2 General Installation Warnings
The AURORA TRIO Transformerless Inverter is designed and tested according to international
safety requirements (UL1741/IEEE1547); however, certain safety precautions must be observed
when installing and operating this inverter. Read and follow all instructions, cautions and warnings
in this installation manual.
WARNING:
All operations regarding transport, installation and start up, including
maintenance, must be carried out by qualified, trained personnel and in
compliance with all prevailing local codes and regulations.

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Part 1 Introduction and Safety
1.2.1.3 Assembly Warnings
Prior to installation, inspect the unit to ensure absence of any transport or handling damage, which
could affect insulation integrity or safety clearances; failure to do so could result in safety hazards.
Assemble the inverter per the instructions in this manual. Use care when choosing installation
location and adhere to specified cooling requirements.
Unauthorized removal of necessary protection features, improper use, incorrect installation and
operation may lead to serious safety and shock hazards and/or equipment damage.
1.2.1.4 Electrical Connection Warnings
This grid-tied inverter system operates only when properly connected to the AC utility grid. Before
connecting the services of the AURORA grid-tied inverter to the AC utility grid, contact the local
power distribution company to receive the appropriate approvals. This connection must be made
only by qualified technical personnel.
WARNING:
Wiring methods used should be in accordance with the National Electric
Code, ANSI/NFPA 70 and/or any prevailing local codes and regulations.
Systems with inverters typically require external disconnect switches or
protective devices (e.g., fusing circuit breakers) depending upon the local
safety regulations.
Output circuits must be isolated from the enclosure and system grounding,
required by Sections 690-40 and 690-42 of the National Electric Code,
ANSI/NFPA 70, and is the responsibility of the installer.
CAUTION:
The Aurora Inverter should be connected only to a dedicated branch circuit.
For models that do not include AC output overcurrent protection, it is the
responsibility of the end user to provide protection for the AC output
circuit.
To reduce the risk of fire, connect Auxiliary Input only to a circuit provided
with 25 amperes maximum branch circuit overcurrent protection in
accordance with the National Electrical Code, ANSI/NFPA 70.

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Part 1 Introduction and Safety
1.2.2 APPROPRIATE USAGE
The AURORA Inverter is a photovoltaic inverter that converts direct current of a PV array into
alternating current and feeds that power into the AC utility grid.
This AURORA Inverter is designed for outdoor use, but can be used indoors if installed to
specified environmental and mounting parameters stated in this manual, and abiding by the
National Electric Code. (See Environmental Conditions in section 1.2.2.2 below and General
Installation Conditions in section 2.2.1 for more information.)
WARNING:
If installed indoors, the inverter must be inaccessible to unqualified
persons.
Figure 1-1: PV array structure in Independent configuration

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Part 1 Introduction and Safety
Figure 1-2: PV array structure in Parallel configuration
CAUTION:
Power-One
accepts no liability for damage of any kind that may arise from incorrect
or careless operation. The equipment must not be used in ways that do not fall
within the intended field of use.

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Part 1 Introduction and Safety
1.2.2.1 Conditions of Use
CAUTION:
The inverter can be used only with photovoltaic modules that do not require
one of the poles to be grounded.
•The operating current dispersed during the normal operation
MUST NOT exceed the limits
documented
in the technical specifications.
•Only one photovoltaic source can be connected to the input of the inverter (do not connect
batteries or other sources of power supply).
•The inverter can be connected to the utility grid in qualified countries
only.
•The inverter can only be used if all the technical requirements in this manual are observed and
applied.
1.2.2.2 Environmental Conditions
Adverse or constrained environmental conditions can lead to a reduction in performance. The
equipment can be installed outdoors, but only in environmental conditions that do not prevent
operation. Care must be taken to provide adequate ventilation if installed indoors.
1.2.2.3 Improper or Prohibited Use
The following actions are dangerous and strictly forbidden under the terms of the warranty:
•Installing the equipment in environments with flammable conditions.
•Using the equipment with safety devices not working or disabled.
•Using the equipment or parts of the equipment by connecting it to other machines or
equipment, unless otherwise expressed.
•Modifying areas that are operator restricted and/or altering parts of the equipment in order
to vary the performance or change its protection.
•Cleaning with corrosive products that may corrode parts of the equipment or generate
electrostatic charges.
•Using or installing the equipment or parts of it without having read and correctly
interpreted the contents of this manual.
•Warming or drying rags on unit or accessory parts is dangerous and could compromise the
ventilation and cooling of the components.

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Part 1 Introduction and Safety
1.2.3 SAFETY INSTRUCTIONS
Warning – These servicing instructions are for use by qualified personnel only.
To reduce the risk of electric shock, do not perform any servicing other than that
specified in the operating instructions.
Danger - Be sure all flammable materials including construction items are away
from the unit. Do not install the inverter in or near potentially explosive areas.
Warning – The AURORA TRIO is not provided with an isolation transformer and is
intended to be installed per NFPA 70, 690.35 with an ungrounded PV array.
These models have no grounded input conductors.
Do not connect an AURORA Inverter to the AC utility grid until receipt of a letter of authorization
from the authority having jurisdiction.
Install the AURORA Inverter in accordance with the electrical standards prescribed by the
applicable National Electric Code (NEC), Canadian Electric Code (CEC), and/or by other local codes
and regulations.
1.2.3.1 General Information
The equipment has been manufactured in accordance with the strictest accident-prevention
regulations and supplied with safety devices suitable for the protection of components and
operators. Inform Power-One about non-standard installation conditions.
Maintenance operations must be carried out according to the Maintenance section in Part 6 of this
manual.
It is essential to provide operators with correct information. They must read and comply with the
technical information given in the manual and any other attached documentation.
The instructions given in the manual do not replace the safety devices and technical data for
installation and operation mounted on the product. They do not replace the safety regulations
enforced in the country of installation and common sense rules.
Do not use the equipment if any operating anomalies are found. Avoid temporary repairs.

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Part 1 Introduction and Safety
All repairs should be carried out using only qualified spare parts, which must be installed in
accordance with their intended use and by a licensed contractor or authorized Power-One Service
representative.
Liabilities arising from commercial components are delegated to their respective manufacturers.
1.2.3.2 Thermal Hazard
Warning - Certain parts may be extremely hot immediately following shut down
due to normal elevated surface temperatures (e.g. transformers, capacitors, coils
etc.).
Prior to touching any part of the inverter use care to ensure surfaces and equipment are at touch-
safe temperatures and voltages before proceeding.
The customer and/or installer must appropriately instruct the operators or anyone who may come
near the equipment, and highlight, if necessary with notices or other means, the hazardous areas or
operations: magnetic fields, hazardous voltages, high temperatures, possibility of discharges,
generic hazard, etc.
Anytime the inverter has been disconnected from the AC utility grid, use extreme caution as some
components can retain charge sufficient to create a shock hazard. To minimize occurrence of such
conditions, comply with all corresponding safety symbols and markings present on the unit and in
this manual.
1.2.3.3 Clothing and Protective Devices
•Appropriate Personal Protective Equipment (PPE) must be worn at all times when
operating or servicing this equipment.
•All operations on the equipment should be performed with properly electrically insulated
instruments.

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1.2.3.4 Location of Safety Notices and Labels
Please note the location of safety notices on the AURORA Inverter for notification and protection.
They are located on both side panels of this unit.
Labels are not to be hidden with external objects or parts such as rags, boxes, or other such
equipment. They should be cleaned periodically and always maintained in view.
1.2.4 CONDITIONS OF WARRANTY
Warranty conditions are described in a certificate supplied with the equipment. The warranty is
understood to be valid if the user observes what is described in this manual. Any conditions
deviating from those described must be explicitly agreed upon in writing.
After inspecting the TRIO Inverter, fill out the warranty information and submit it to Power-One.
Submitting this information will register the unit with the manufacturer and the owner will receive
technical updates.
Warranty exclusions can be found on the Power-One Renewable Energy website in the download
section of the AURORA TRIO product page.

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PART 2 UNPACK AND SELECT
INSTALLATION LOCATION

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Part 2 Unpack and Select Installation Location
2.1 GENERAL CONDITIONS
Some specifications are not applicable to small equipment or components.
2.1.1 TRANSPORTATION AND HANDLING
Transportation of the equipment, especially by road, must be carried out by suitable ways and
means for protecting the components (in particular, the electronic components) from violent
shocks, humidity, vibration, etc.
During handling, do not make any sudden or fast movements that
can create dangerous
swinging.
WARNING
During transportation the TRIO equipment should only be stacked three high.
For storage purposes,
it can withstand a maximum load of four pieces of
equipment (stacked five high), if stored correctly.
DO NOT stack with equipment or products other than those indicated.
2.1.2 LIFTING
Power-One packages and protects individual components using suitable means to make their
transport and subsequent handling easier. Due to the weight and complexity of this equipment,
Power-One recommends the process of loading and unloading of this equipment be done by an
experienced or specialized staff knowledgeable in material handling.
Where indicated or where there is a provision, eyebolts or handles can be inserted and used as
lifting points.Do not lift several units or parts of the equipment at the same time, unless otherwise
indicated.
2.1.3 UNPACKING AND CHECKING
Discard packaging elements immediately to avoid injury. When opening the package, check that the
equipment is undamaged and confirm all components are present. If you find any defects or
damage, stop unpacking and consult the carrier, and also promptly inform Power-One.

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Part 2 Unpack and Select Installation Location
2.1.4 INCOMING INSPECTION
It is the customer’s responsibility to examine the condition of the unit. Upon receipt of Power-One’s
AURORA grid-tied inverter, please check the following:
•Inspect the shipping container for any external damage.
•Inventory the contents against Table 2-1 below and verify receipt of all items. Use care not
to discard any equipment, parts, or manuals.
•Call the delivering carrier if damage or shortage is detected.
If inspection reveals damage to the inverter, contact the supplier, or authorized distributor for a
repair/return determination and instructions regarding the process.
Table 2-1: Components shipped with equipment
COMPONENTS FOR ALL MODELS QTY
Mounting bracket (1),
wall anchor, screw, washer (10 each) 1 kit
8 pin connector
4
3 pin connector
2
Torx wrench; 90°; T20; 64x23mm
1
COMPONENTS FOR -S MODELS ONLY QTY
Jumpers for configuration of parallel
input channels
2
COMPONENTS FOR –S1, -S1A, -S1B MODELS ONLY QTY
Jumper cables for configuration of
parallel input channels
1 Red
1 Black
OPTIONAL COMPONENTS AVAILABLE FROM POWER-ONE QTY
Optional lifting kit includes handles and
eyebolts for lifting the inverter
1 kit

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Part 2 Unpack and Select Installation Location
2.1.5 HANDLING THE TRIO
The AURORA TRIO Inverter unit and wiring box arrive unattached and are installed separately to
ease installation. When mounting the TRIO, it is recommended to install the wiring box first and
complete all necessary wiring and conduit connections before mounting and attaching the inverter
unit.
INVERTER UNIT
Weight:
TRIO-20.0: 132 lbs/60 kg
TRIO-27.6: 143 lbs/65 kg
Number of lifting points : 4
The inverter portion weighs 132
pounds or more, depending on the
version,
and should be lifted by
two persons.
An optional lifting
kit, with
handles and eyebolts for lifting the
inverter, is available from Power-
One and can be used to assist in
hanging the inverter on the
mounting bracket.
OPTIONAL LIFTING KIT
M 12
mounting kit with
handles
and eyebolts
The wiring box weight is listed
below:
COMBINER BOX UNIT
Weight:
-S version: 19 lbs/9 kg
-S1, -S1A, -S1B: 25 lbs/11 kg