REFU 1T Series, REFUone 1.6K-1T, 801P3K3.100, REFUone 3.3K-1T, 801P1K6.100 Operating Instructions Manual

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Operating Instructions

REFUone 1.6K-1T ... 3.3K-1T

Version 1 (No. 982075) 801 Series (1T) October 2019

REFUone 1.6K-1T … 3.3K-1T

Notice

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

Save these instructions!

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

The copyright of this manual belongs to REFU Elektronik GmbH. Any corporation or individual should not plagiarize, partially copy or fully copy it (including software, etc.), and no reproduction or distribution of it in any form or by any means. All rights reserved.

REFU reserves the right of final interpretation. This manual is subject to change according to user’s or customer’s feedback. Please check our website at version.

http://www.refu.com

for latest

REFU Elektronik GmbH Marktstraße 185 D-72793 Pfullingen Tel.: +49 (0)7121-4332 0 Fax: +49 (0)7121–4332 140 Mail: info@refu.com

REFUone 1.6K-1T … 3.3K-1T

Preface

Outline

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

Scope

This product manual describes the installation, electrical connections, commissioning, maintenance and troubleshooting of REFUone 1.6K-1T … 3.3K-1T inverters.

Keep this manual where it will be accessible at all times.

Target Group

This manual is intended for qualified electrical technical personnel who are responsible for inverter installation and commissioning in the PV power system and the PV plant operator.

Symbols Used

This manual provides safety operation information and uses the symbol in order to ensure personal and property security and use the inverter efficiently when operating the inverter. You must understand these emphasized information to avoid the personal injury and property loss. Please read the following symbols used in this manual carefully.

DANGER

WARNING

CAUTION

ATTENTION

Note

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

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

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

Attention indicated potential risks which, if not avoided, may lead to equipment fault or property damage.

Note provides tips that are valuable for the optimal operation of the product.

REFUone 1.6K-1T … 3.3K-1T

Table of Contents

1.1 Safety instructions ............................................................................................................................ 5

1.2 Symbols and signs ............................................................................................................................ 8

2.1 Product dimensions ......................................................................................................................... 9

2.2 Function description ...................................................................................................................... 12

2.3 Efficiency curve .............................................................................................................................. 13

3.1 Installation Process ........................................................................................................................ 14

3.2 Checking Before Installation .......................................................................................................... 14

3.3 Tools ............................................................................................................................................... 16

3.4 Determining the Installation Position ............................................................................................ 17

3.5 Moving the REFUone inverter ........................................................................................................ 19

3.6 Installing REFUone inverter ............................................................................................................ 20

4.1 Electrical connection ...................................................................................................................... 22

4.2 Connecting PGND Cables ............................................................................................................... 22

4.3 Connecting DC Input Power Cables ............................................................................................... 23

4.4 Connecting AC Output Power Cables............................................................................................. 25

4.5 Connecting RS485, CT, DRMs Cables ............................................................................................. 28

4.6 WiFi/GPRS module installation proc e dur e ............................................................................ 32

4.7 WiFi Communication ...................................................................................................................... 32

4.8 Monitoring Portal REFUlog ............................................................................................................ 34

4.9 RS485 Communication ................................................................................................................... 35

5.1 Safety inspection before commissioning ....................................................................................... 36

5.2 Start Inverter .................................................................................................................................. 36

6.1 Operation and Display Panel.......................................................................................................... 37

6.2 Standard Interface.......................................................................................................................... 38

6.3 Main Interface ................................................................................................................................ 39

6.4 Update Software ............................................................................................................................ 47

7.1 Trouble shooting ............................................................................................................................. 48

7.2 Maintenance .................................................................................................................................. 53

8.1 DC Data ........................................................................................................................................... 54

8.2 AC Data ........................................................................................................................................... 54

8.3 Efficiency, Protection and Communication ................................................................................... 55

8.4 General Data .................................................................................................................................. 55

9 10

Basic safety information ................................................................................... 5

Product characteristics ...................................................................................... 9

Installation ..................................................................................................... 14

Electrical Connections ..................................................................................... 21

Commissioning of inverter .............................................................................. 36

Operation interface ........................................................................................ 37

Trouble shooting and maintenance ................................................................. 48

Technica

l data ................................................................................................. 54

Quality Assurance ........................................................................................... 56

Technical Support ........................................................................................... 57

REFUone 1.6K-1T … 3.3K-1T

Basic safety information

If you have any question or problem when you read the following information, please contact REFU Elektronik GmbH.

Note

Outlines of this chapter

Safety instruction

It mainly introduce the safety instruction when install and operate the equipment.

Symbols and signs

It mainly introduce the safety symbols on the inverter.

1.1

1.1.1

The customer must make sure the operator has the necessary skill and training to do his/her job. Staff in charge of using and maintaining the equipment must be skilled, aware and mature for the described tasks and must have the reliability to correctly interpret what is described in the manual. For safety reason only a qualified electrician, who has received training and / or has demonstrated skills and knowledge in construction and in operation of this unit, can install this inverter. REFU Elektronik GmbH does not take any responsibility for the property destruction and personal injury because of any incorrect use.

Safety instructions

• Read and understand the instructions of this manual, and be familiar with relevant

safety symbols in this chapter, then start to install and troubleshoot the equipment.

• According to the national and state requirements, before connecting to the electrical

grid, you must get permission from the local electrical grid operator, and the operation can only be performed by qualified electrical engineer.

• Please contact the nearest authorized service center if any maintenance or repair is

needed. Contact your distributor for the information of the nearest authorized service center. Do NOT repair it by yourself, it may cause injury or property damage.

• Before installing and maintaining the equipment, you should turn the DC switch OFF to

cut off the high voltage DC of the PV array. You can also turn the switch in the PV combiner box OFF to cut off the high voltage DC. Otherwise, serious injury may be caused.

Qualified persons

1.1.2

Please install inverter according to the following section. Fix the inverter on an appropriate objects with enough load bearing capacity (such as walls, PV racks etc.), and ensure that inverter is vertical placed. Choose a place suitable for installing electrical devices. Assure there is enough fire exit space, convenient for maintenance. Maintain proper ventilation to ensure enough air cycle to cool the inverter.

Installation requirements

REFUone 1.6K-1T … 3.3K-1T

1.1.3

Transport requirements

If you find packing problems that may cause the damage of the inverter, or find any visible damage, please immediately notice the responsible transportation company. You can ask solar equipment installation contractor or REFU Elektronik GmbH for help if necessary. Transport 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.

1.1.4

Electric connection

Please comply with all the current electrical regulations about accident prevention in dealing with the solar inverter.

Before the electrical connection, make sure to use opaque material to cover the PV modules or to disconnect PV array DC switch. Exposure to the sun, PV array will produce a dangerous voltage!

All installation accomplished only by professional electrical engineer!

• must be trained;

•

Completely read the manual operation and understand relevant matters.

Get permission from the local electrical grid operator, complete all electrical connections by professional electrical engineer, then connect inverter to electrical grid.

It is forbidden to remove the tamper evident label, or open the inverter. Otherwise REFU will not provide warranty or maintenance!

DANGER

WARNING

ATTENTION

Note

1.1.5

REFUone 1.6K-1T … 3.3K-1T

Operation

Touching the electrical grid or the terminal of the equipment may lead to electrocution or fire!

1.1.6

DANGER

ATTENTION

Maintenance and repair

DANGER

• Don’t touch the terminal or conductor connected to the electrical grid.

• Pay attention to any instructions or safety documents related to grid

connection.

Some internal components will be very hot when inverter is working. Please wear protective gloves!

• Before any repair work, turn OFF the AC circuit breaker between the

inverter and electrical grid first, then turn OFF the DC switch.

• After turning OFF the AC circuit breaker and DC switch, wait for 5

minutes at least before carrying out any maintenance or repair work.

• Inverter should work again after removing any faults. If you need any

repair work, please contact with the local authorized service center;

• Can’t open the internal components of inverter without authorized.

REFU Elektronik GmbH does not take any responsibility for the losses from that.

1.1.7

EMC / noise level of inverter

Electromagnetic compatibility (EMC) refers to that one electrical equipment functions in a given electromagnetic environment without any trouble or error, and impose no unacceptable effect upon the environment. Therefore, EMC represents the quality characters of an electrical equipment.

• The inherent noise-immune character: immunity to internal electrical noise.

• External noise immunity: immunity to electromagnetic noise of external system

• Noise emission level: influence of electromagnetic emission upon environment.

Electromagnetic radiation from inverter may be harmful to health!

Please do not continue to stay around the inverter in less than 20 cm when inverter is working.

DANGER

REFUone 1.6K-1T … 3.3K-1T

1.2

1.2.1

1.2.2

ATTENTION

WARNING

Symbols and signs

Safety symbols

Caution of burn injuries due to hot enclosure!

CAUTION

Signs on the inverter

• You can only touch the screen and pressing key of the inverter while it’s

working.

PV array should be grounded in accordance to the requirements of the local electrical grid operator!

We suggest that all PV module frames and inverter are reliably grounded to protect the PV system and personnel security.

Ensure input DC voltage < Max. DC voltage .Over voltage may cause permanent damage to inverter or other losses, which will not be included in warranty!

There are some symbols, which are related to security on the inverter. Please read and understand the content of the symbols, and then start the installation.

IP65

There is a residual voltage in the inverter! Before opening the equipment, operator should wait for five minutes to ensure the capacitor is discharged completely.

Caution, risk of electric shock.

Caution, hot surface.

Comply with the (CE) certification.

Grounding point.

Please read this manual before install REFUone inverters.

This indicates the degree of protection of the equipment according to IEC standard EN 60529 June 1997.

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

REFUone 1.6K-1T … 3.3K-1T

Product characteristics

Outlines of this chapter

Product dimensions

It introduces the field of use, and the overall dimensions of the REFUone inverters.

Function description

It introduces how REFUone inverters work and the functionality of the device.

Efficiency curves

It introduces the efficiency curves of in the inverter.

2.1

2.1.1

REFUone inverters are single MPPT grid-tied PV inverters which converts the DC power generated by PV arrays into sine wave single-phase AC power and feeds it to the public electrical grid, AC circuit breaker (refer to Section 4.4) and DC switch used as disconnect device, and the disconnect device shall be easily accessible.

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

Product dimensions

Field of use

PV Grid-tied System

• The choice of optional parts of inverter should be made by a qualified technician who

knows the installation conditions clearly.

• Overall dimensions REFUone 1.6K-1T (L×W×H): 303 × 261 × 118 mm.

• Overall dimensions REFUone 3.3K-1T (L×W×H): 321 × 261 × 132 mm.

REFUone 1.6K-1T … 3.3K-1T

261 mm

118 mm

Front view and left view dimensions of REFUone 1.6K-1T

Front view and left view dimensions of REFUone 3.3K-1T

303 mm

RUN

FAULT

261 mm

131 mm

321 mm

RUN

FAULT

REFUone 1.6K-1T … 3.3K-1T

235.0 mm

6 mm

Back view and Bracket dimensions REFUone 1.6K-1T…3.3K-1T

160.0 mm

10 mm

80.0 mm

2.1.2

Labels on the equipment

The labels must NOT be hidden with objects and extraneous parts (rags, boxes, equipment, etc.); they must be cleaned regularly and kept visible at all times.

21.4 mm

78.1 mm

Modelo: REFUone 3.3K-1T

REFU Elektronik GmbH, Marktstrasse 185 72793 Pfullingen, Alemanha

fabricados na República Popular da China

Inversor Solar

Grid-Tied

Tipo: 801P003.100

www.refu.com

REFUone 1.6K-1T … 3.3K-1T

2.2

DC power generated by PV array is filtered through Input Board before entering into Power Board. Input Board also offer functions such as insulation impedance detection and input DC voltage / current detection. DC power is converted to AC power by Power Board. AC power is filtered through Output Board then AC power is fed into the grid. Output Board also offer functions such as grid voltage / output current detection, GFCI and output isolation relay. Control Board provides the auxiliary power, controls the operation state of inverter and shows the operation status by Display Board. Display Board displays fault code when inverter is in abnormal operation conditions. At the same time, Control Board can trigger the relay so as to protect the internal components.

Function module

Energy management unit

This control can be used to switch the inverter on/off through an external (remote) control.

Feeding reactive power into the grid

The inverter is able to produce reactive power and can therefore feed it into the grid through the setting of the phase shift factor. Feed-in management can be controlled directly by the grid company through a dedicated RS485 serial interface.

Limiting the active power fed into the grid

The inverter, if enabled can limit the amount of active power fed into the grid by the inverter to the desired value (Expressed as a percentage).

Function description

Self power reduction when grid is over frequency

When the grid frequency is higher than the limited value, inverter will reduce output power which is necessary for the grid stability.

Data transmission

The inverter or a group of inverters may be monitored remotely through an advanced communication system based on RS-485 serial interface, or remotely via the WiFi.

Software update

USB adaptor is used for updating the firmware.

REFUone 1.6K-1T … 3.3K-1T

AC Output

Electrical block diagram

DC Input

1A +

1A -

2.3

DC Switch

DC EMC filter

USB GPRS/Ethernet

DC/DC Booster

MPPT

Master DSP Slave DSP

WiFi RS485

Efficiency curve

Efficiency Curve REFUone 3.3K-1T

In/Out

DC/AC Inverter

Remote Control

(opt.)

AC grid relais

AC EMC filter

REFUone 1.6K-1T … 3.3K-1T

Inverter

Inver

ter

Install the rear panel

installation

tools

installation position

Installation

Outlines of this chapter

This topic describes how to install the REFUone inverters.

Installation notes

• Do NOT install the REFUone inverter on flammable material.

DANGER

CAUTION

• Do NOT install the REFUone inverter in an area used to store flammable or

explosive materials.

• The enclosure and heat sink are very hot while the inverter is working,

therefore do NOT install the REFUone inverter in places where you might touch them inadvertently.

• Consider the weight of the inverter when transporting and moving.

ATTENTION

3.1

3.2

3.2.1

Packing materials and components may be damaged during transportation. Therefore, check the outer packing materials before installing the inverter. Check the outer packing materials for damage, such as holes and cracks. If any damage is found, do not unpack the REFUone inverter and contact the dealer as soon as possible. You are advised to remove the packing materials within 24 hours before installing the REFUone inverter.

Installation Process

Installation flowchart

End

Checking Before Installation

Checking Outer Packing Materials

• Choose an appropriate mounting position and surface.

• Assign at least two persons to install the inverter.

Check before

Install the

Prepare installation

Determine the

Moving the

3.2.2

After unpacking the inverter, check whether deliverables are intact and complete. If any damage is found or any component is missing, contact the dealer.

Checking Deliverables

REFUone 1.6K-1T … 3.3K-1T

Table 1 shows the components and mechanical parts that should be delivered

No.

Pictures

Description

REFUone inverter

Rear panel 1 pcs

PV+ input terminal 1 pcs

PV-input terminal 1 pcs

1 pcs

Quantity

Metal terminals secured to PV+ input power cables

Metal terminals secured to PV- input power cables

M5 Hexagon screws 2 pcs

Expansion bolts 3 pcs

Self-tapping screw 5 pcs

Manual

(English and Portuguese)

1 pcs

AC output terminal 1 pcs

485 terminal (2pin) 1 pcs

REFUone 1.6K-1T … 3.3K-1T

3.3

Tools

Prepare tools required for installation and electrical connections.

Table 2 shows the tools required for installation and electrical connections.

No.

Tool

Model

Hammer drill Recommend drill dia. 6mm

Screwdriver wiring

Removal tool Remove PV terminal

Wire stripper Strip wire

Function

Used to drill holes on the wall

4mm Allen Wrench Turn the screw to connect rear panel

with inverter

Marker Used to mark signs

0- 180º

Crimping tools Used to crimp power cables

Multi-meter Used to check grounding

Measuring tape Used to measure distances

Level Used to ensure that the rear panel is

properly installed

ESD gloves Operators wear

REFUone 1.6K-1T … 3.3K-1T

Safety goggles Operators wear

Anti-dust respirator Operators wear

3.4

Determining the Installation Position

Determine an appropriate position for installing the REFUone inverter. Comply with the following requirements when determining the installation position:

Installation Requirements

REFUone 1.6K-1T … 3.3K-1T

clearance for single REFUone inverter

Installation of multiple REFUone inverters

10 cm

100 cm

20 cm

REFUone 1.6K-1T … 3.3K-1T

3.5

Moving the REFUone inverter

This topic describes how to move the REFUone horizontally to the installation position

Step 1:

Open the packaging, insert hands into the slots on both sides of the inverter and hold

the handles, as shown in Figure 11 and Figure 12.

Moving the REFUone inverter (1)

Moving the REFUone inverter (2)

Step 2:

ATTENTION

Lift the REFUone from the packing case and move it to the installation position.

To prevent device damage and personal injury, keep balance when moving the inverter because the inverter is heavy.

Do not put the inverter with its wiring terminals contacting the floor because the power ports and signal ports are not designed to support the weight of the inverter. Place the inverter horizontally.

When placing the inverter on the floor, put foam or paper under the inverter to protect its shell

REFUone 1.6K-1T … 3.3K-1T

3.6

Step 1:

mark the hole positions using a marker pen, use the hammer drill to drill holes on the wall. Keep the hammer drill perpendicular to the wall, do not shake when drilling, so as not to damage the wall. If the error of the hole positions is too big, you need to reposition.

Step 2:

of the expanding bolt (should be deep enough).

Step 3:

expansion bolt with the nuts.

Installing REFUone inverter

Determine the positions for drilling holes, ensure the hole positions are level, then

Insert the expansion bolt vertically into the hole, pay attention to the insertion depth

Align the rear panel with hole positions, fix the rear panel on the wall by tightening the

Wall mounting 3K-2T, 5K-2T

Step 1 Step 2 Step 3

Step 4:

panel to ensure safety.

Step 5:

an anti-theft lock (this action is optional).

Hook the inverter to the rear panel. Use a M5 screw to secure the inverter to the rear

You can secure the inverter to the rear panel and protect it from stealing by installing

Securing the REFUone inverter

Step 4 Step 5

REFUone 1.6K-1T … 3.3K-1T

Electrical Connections

Outlines of this chapter

This topic describes the REFUone inverter electrical connections. Read this part carefully before connecting cables.

NOTE:

Before performing electrical connections, ensure that the DC switch is OFF. Since the stored electrical charge remains in a capacitor after the DC switch is turned OFF. Therefore, it’s necessary to wait for at least 5 minutes for the capacitor to be electrically discharged.

ATTENTION

DANGER

Isc PV

Maximum output overcurrent protection

Note

(absolute maximum)

Installation and maintenance of inverters must be operated by professional electrical engineers.

PV modules generate electric energy when exposed to sunlight and can create an electrical shock hazard. Therefore, before connecting DC input power cable, cover PV modules using opaque cloth.

For REFUone 1.6K-1T, open-circuit voltage (Voc) of module arrays connected in series must be ≤ 500V; for REFUone 3.3K-1T, it must be ≤ 550V, at any ambient temperature at the installation location.

The connected PV modules must have an IEC 61730 Class A rating.

15 A

REFUone 1.6K-1T 7.7 A

REFUone 3.3K-1T 16 A

The decisive voltage class (DVC).

NOTE: The DVC is the voltage of a circuit, which occurs continuously between any two live

part in the worst-case rated operating condition when used as intended.

Interface DVC

PV input interface DVC C

AC output interface DVC C

RS485 interface DVC A

USB interface DVC A

WiFi/GPRS/Ethernet interface DVC A

REFUone 1.6K-1T … 3.3K-1T

L4<1.5mm

4.1

4.2

Connect the inverter to the grounding electrode using protection ground (PGND) cables for grounding purposes.

ATTENTION

Prerequisites:

Electrical connection

Shows the flowchart for connecting cables to the inverter

Start

End

Connect PGND Cables

Connect Communication Cables (not mandatory)

Connecting PGND Cables

The inverter is transformer-less, requires the positive pole and negative pole of the PV array are NOT grounded. Otherwise, it will cause inverter failure. In the PV power system, all non current-carrying metal parts (such as: PV module frame, PV rack, combiner box enclosure, inverter enclosure) should be connected to earth.

Connect DC Input power Cables

Connect AC Output power Cables

The PGND cables are prepared (≥6mm² outdoor power cables are recommended for grounding purposes), the color of cable should be yellow-green.

Procedure:

Step 1

in Figure 16.

Step 2

tool, as shown in Figure 17.

Note 1:

Remove the insulation layer with an appropriate length using a wire stripper, as shown

Preparing a ground cable (1)

L2=L1+(2-3)mm

Insert the exposed core wires into the OT terminal and crimp them by using a crimping

Preparing a ground cable (2)

L3<2mm

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 core wires protruding from the crimped part.

Note 2:

The cavity formed after crimping the conductor crimp strip shall wrap the core wires completely. The core wires shall contact the terminal closely.

REFUone 1.6K-1T … 3.3K-1T

Step 3

torque of 3 Nm using an Allen wrench.

Install the crimped OT terminal, flat washer using M5 screw, and tighten the screw to a

Ground terminal composition

1. M5 screw

2. OT Terminal

3. Tapped Hole

4.3

Table 3 Recommended DC input cable specifications

Cross-Sectional Area (mm2)

Range

4.0 … 6.0 4.0 4.5 … 7.8

Procedure

Step 1:

Step 2:

power cables by using a wire stripper as show in Figure 19.

Connecting DC Input Power Cables

External Cable Diameter (mm)

Remove cable glands from the positive and negative connectors.

Remove the insulation layer with an appropriate length from the positive and negative

Recommended Value

REFUone 1.6K-1T … 3.3K-1T

Note

Connecting DC input power cables

1. Positive power cable

2. Negative power cable

L2 is 2 to 3 mm longer than L1.

Step 3

Step 4

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

Insert the stripped positive and negative power cables into the positive and negative metal terminals respectively and crimp them using a clamping tool. Ensure that the cables are crimped until they cannot be pulled out by force less than 400 N, as shown in Figure 20:

Connecting DC input power cables

1. Positive power cable 2. Negative power cable

Step 5

Insert crimped power cables into corresponding housings until you hear a “click“ sound.

The power cables snap into place.

Step 6

Reinstall cable glands on positive and negative connectors and rotate them against the

insulation covers.

Step 7

Insert the positive and negative connectors into corresponding DC input terminals of the inverter until you hear a “click“ sound, as shown in Figure 21:

1. Bayonet

Connecting DC input power cables

Note:

Insert the stoppers into the unused DC connectors.

REFUone 1.6K-1T … 3.3K-1T

Follow-up Procedure

To remove the positive and negative connectors from the inverter, insert a removal wrench into the bayonet and press the wrench with an appropriate strength, as shown in Figure 22

CAUTION

Removing a DC input connector

Before removing the positive and negative connectors, ensure that the DC SWITCH is OFF.

4.4

Connecting AC Output Power Cables

Connect the REFUone to the AC power distribution frame (PDF) or power grid using AC output power cables.

• It is not allowed for several inverters to use the same circuit breaker

• It is not allowed to connect loads between inverter and circuit breaker

CAUTION

• AC breaker used as disconnect device, and the disconnect device shall remain

readily operable.

Context

All the AC output cables used for the inverters are outdoor three-core cables. To facilitate the installation, use flexible cables. Table 4 lists the recommended specifications for the cables.

NOT allowed: connect loads between inverter and circuit breaker

Table 4 Recommended AC output cable specifications

Model REFUone 1.6K-1T REFUone 3.3K-1T

Cable (Copper) ≥ 4mm² ≥ 6mm²

Circuit Breaker 16A/400V 25A/400V

REFUone 1.6K-1T … 3.3K-1T

Multi core copper wire

wire length, wire cross sectional area and wire power loss:

AC cable should be correctly sized to ensure the power loss in AC cable is less than 1% of the rated power. If the resistance of the AC cable is too high, it will cause a huge increase in the AC voltage, which may lead to a disconnection of the inverter from the electrical grid. The relationship between power loss in AC cable and wire length, wire cross sectional area is shown in the following figure:

If inverter is equipped with IP66 AC output connector dedicated for PV inverter, customer need to make AC output cable connections by himself, and the appearance of the AC connector is shown below

AC output connector

REFUone 1.6K-1T … 3.3K-1T

AC wire connections procedure:

Step 1

Select appropriate cables according to Table 4, Remove the insulation layer of the AC

output cable using a wire stripper according to the figure shown below:

Cable length

A: 30 … 50 mm B: 6 … 8 mm

Step 2

output cable (with its insulation layer stripped according to step 1) through the waterproof locking cable gland;

Disassemble the AC connector according to the figure shown below: insert the AC

AC connector cable entry

Step 3

Connect AC output cable as per the following requirements:

• Connect the yellow-green wire to the hole labeled ‘PE’, fasten the wire using an Allen

wrench;

• Connect the brown wire to the hole labeled ‘L’, fasten the wire using an Allen wrench;

• Connect the blue wire to the hole labeled ‘N’, fasten the wire using an Allen wrench;

REFUone 1.6K-1T … 3.3K-1T

AC connector inside

L – brown, N – blue, PE – yellow/green

Step 4

are securely connected;

Step 5

AC connector clockwise until the fastener reaches its designated position, as shown below:

Secure the locking cable gland clockwise, shown as below: make sure that all the wires

Connect the AC output connector to the output wiring terminal of inverter, rotate the

AC connector

Step 4 Step 5

4.5

The communication interface location of the REFUone is shown in the figure below.

Connecting RS485, CT, DRMs Cables

Bottom view of inverter

REFUone 1.6K-1T … 3.3K-1T

The wiring methods are the same for RS485 and CT, this part describes their wiring methods and DRMS wiring methods.

Table 5 Recommended communication cable sizes are shown below

Communication function

Cable size

Outside diameter

Step 1:

Remove the communication waterproof cover using a screwdriver;

Cable Gland

RS485

0.5 … 1.5 mm²

2.5 … 6 mm

CT (Current Transformer)

0.5 … 1.5 mm²

2.5 … 6 mm

Step 2:

Unlock the waterproof cable gland, remove the stopper in the waterproof connector

Cable Gland

A1: Waterproof stopper

Step 3:

• Select appropriate cable according to Table 5

• remove the insulation layer using a wire stripper, the length of the wire core is about 6

• insert the cable through the cable gland and waterproof cover

REFUone 1.6K-1T … 3.3K-1T

• according to Table 6, connect the wires as per the labels, and secure the wire using a

slotted screwdriver.as shown in the figure below:

Table 6 Function description of the communication terminals

Type RS485 Current Transformer DRM’s

Connector

Label TX- TX+ CT- CT+

Function

RS485

differential

signal-

RS485

differential

signal+

Current

transformer

Current

transformer

Top

Front

See following table

TX- TX+

CT- CT+

Table 7 Function description of the DRMs terminal

No.

Color Function

1 White and

orange

DRM1/5

2 Orange DRM2/6

3 White and green DRM3/7

4 Blue DRM4/8

5 White and blue RefGen

6 Green Com/DRM0

7 White and brown

8 Brown

PIN7 & PIN8 short internal

REFUone 1.6K-1T … 3.3K-1T

Note:

1. DRMs connection is only available for Australia and New Zealand;

2. Supported DRM command: DRM0, DRM5, DRM6, DRM7, DRM8

Step 4:

waterproof cover, rotate the cable gland clockwise to fasten it securely.

Insert the terminal as per the printed label, and then tighten the screws to fix the

REFUone 1.6K-1T … 3.3K-1T

4.6

Step 1

Step2:

Step3

WiFi/GPRS module installation procedure

: remove WiFi / GPRS waterproof cover using screw driver

Install WiFi / GPRS module.

: Fasten WiFi / GPRS module using screws.

4.7

REFUone grid-connected inverters offer WiFi communication modes as standard.

Refer to the figure shown below:

WiFi Communication

REFUone 1.6K-1T … 3.3K-1T

The operation information (generated energy, alert, operation status) of the inverter can be transferred to the REFUlog monitoring portal via WiFi.

4.7.1

Preparation:

Configuration of WiFi Stick with PC

The WiFi Stick is installed according to section 0 and the REFUone Inverter must

be running.

Follow the following steps to configure the WiFi stick:

Step 1

: connect your PC with WiFi network to the Access Point of the WiFi stick. The name of

the WiFi is “AP” followed by the serial number of the WiFi Stick (see type label)

If you are asked for a password, read it from the WiFi Stick label at PWD

Step 2

: Open an internet browser, and enter the address

10.10.100.254

Recommended browsers: Internet Explorer 8+, Google Chrome 15+, Firefox 10+

Step 3

: Fill in username and password, both of which are “admin” as default. The Status page

opens

Step 4

: Click “Wizard” to configure how the WiFi Stick can access your internet gateway.

Result: the WiFi Stick will start to send monitoring data to REFUlog.

Note: Please refer to the detailed instructions delivered with the WiFi stick.

REFUone 1.6K-1T … 3.3K-1T

4.7.2

To download the App for iPhone, search “REFUone Set“ in Apple Store.

To download the App for Android, search “REFUone Set“ in Google Play Store.

WiFi Connection Configuration

1) The App will automatically get your WiFi network, so you need to enter your WiFi password

to continue the configuration. If the network is not correct, select [switch network], then find or manually enter the network ID.

2) On iPhone, go to [Network Settings] interface, and select the stick logger's network with

the name AP _XXXXX (Serial Number of the WiFi Stick without leading 0). Then return to the App, the WiFi Stick will start to configure.

3) The connection will automatically start after connect the network.

Configuration of WiFi Stick with App

Note: If it is unable to find an AP_XXXXX (Serial number without leading 0) in

wireless network list, please make sure to shorten the distance between WiFi routers and Stick to under 10 meters. The connection or setting may appear problem, if you have repeat the above steps and still cannot find the AP _XXXXX. Please follow the WiFi Stick Manual for troubleshooting or contact our Customer Center.

4.8

The REFUone inverters are sending the operating data to the REFUlog monitoring portal, when the WiFi connection is established.

Once an internet connection is established, the inverter will automatically start to send data to REFUlog every 5 minutes.

To view the inverter data, open existing username and password or register as a new user.

You can use the activation code provided on the inverter to assign one or more inverter to a PV system in your account.

Monitoring Portal REFUlog

www.refu-log.com

REFUlog Monitoring Portal

with your browser and login with your

REFUone 1.6K-1T … 3.3K-1T

4.9

4.9.1

RS485 Communication

Communication between one inverter and one PC

Refer to the figure shown below, connect the TX+ and TX- of the inverter to the TX+ and TX- of the RS485→ USB adapter, and connect the USB port of the adapter to the computer. (Note 1)

4.9.2

1: Radio ripple control receiver 2: RS 485 to USB Adapter

Communication between multiple inverters and one PC

1. RS485

Refer to the following figure: RS485 wires are connected in parallel between inverters, refer to section 4.5 of this manual for wire connection methods. Connect the TX+ and TX- of the inverter to the TX+ and TX- of the RS485

→USB adapter; connect the USB port of the adapter to the

computer. A maximum of 31 inverters can be connected in one daisy chain. (Note 2)

RS485

1: Radio ripple control receiver 2: RS 485 to USB Adapter

Note 1:

Note 2:

The length of the RS485 communication cable should be less than 1000 m.

When multiple inverters are connected via RS485 wires, set mod-bus address to differentiate the inverters.

REFUone 1.6K-1T … 3.3K-1T

Commissioning of inverter

5.1

ATTENTION

5.2

Step 1:

Step 2:

When the DC power generated by the solar array is adequate, the REFUone inverter will start automatically. Screen showing “normal” indicates correct operation.

Step 3:

Notice: Different distribution network operators in different countries have different requirements regarding grid connections of PV grid connected inverters.

Therefore, it is very important to make sure that you have selected the correct country code according to requirements of local authority.

Please consult qualified electrical engineer or personnel from electrical safety authorities about this.

Safety inspection before commissioning

Ensure that DC and AC voltages are within the acceptable range of the inverter.

Start Inverter

Turn ON the DC switch.

Turn ON the AC circuit breaker.

Choose the correct country code. (Refer to section 0 of this manual)

REFU Elektronik GmbH is not responsible for any consequences arising out of incorrect country code selection.

If the inverter indicates any fault, please refer to of this manual trouble shooting for help.

REFUone 1.6K-1T … 3.3K-1T

Operation interface

Outlines of this chapter

This section introduces the display, operation, buttons and LED indicator lights of REFUone Inverter.

6.1

Buttons and Indicator lights

ERROR

(A) Buttons

(B) Indicator Lights

Operation and Display Panel

Long press the button to enter the next menu or confirm the selection

Short press the button to achieve the next page turning function

Turn down the loop once to exit

• ON (Green)

o ON: “ Normal ” state

o Flash: “ Wait ” or “ Check ”state

•

ERROR (Red)

o ON: ‘Fault’ or ‘Permanent’ state

REFUone 1.6K-1T … 3.3K-1T

6.2

Standard Interface

When power-on, LCD interface displays INITIALIZING, refer below picture.

Initializing…

When control board successfully connected with communication board, the LCD display the current state of the inverter, display as shown in the figure below.

Waiting States, Countdown 10 s.

Wait 10s

Check

(depends on country code, some are 60 s.)

Checking

Normal

Normal Power Generation

REFUone 1.6K-1T … 3.3K-1T

Fault

Regular error state

Permanent

Unrecoverable error state

Wait:

Inverter is waiting to Check State at the end of reconnection time. In this state,

grid voltage value is between the max and min limits and so on; If not, Inverter will go to Fault State or Permanent State.

Check:

Inverter is checking isolation resistor, relays, and other safety requirements. It

also does self-test to ensure inverter software and hardware are functional. Inverter will go to Fault State or Permanent State if any error or fault occurs.

Normal:

Inverter enter to Normal State, it is feeding power to the grid; inverter will go

to Fault State or Permanent state if any error or fault occurs.

Fault:

Fault State: Inverter has encountered recoverable error. It should recover if the

errors disappear. If Fault State continues, please check the inverter according error code.

Permanent:

Inverter has encountered unrecoverable error, we need maintainer debug this kind of error according to error code.

When the control board and communication board connection fails, the LCD display interface as shown in the figure below.

6.3

DSP communicate fail

Main Interface

Press “ESC” button under standard interface to enter into main interface, including:

Normal

Long press the button!

1. Enter Setting

2. Event List

3. SystemInfo

4. Display Time

5. Software Update

REFUone 1.6K-1T … 3.3K-1T

(A) “Enter Setting” Interface as below:

1.Enter Setting

1. Set Time 12. Set Safety Voltage

2. Clear Energy

3. Clear Events

4. Set Country

5. On-Off Control

6. Enable Set Country

7. Set Energy

8. Set Address

9. Set Input mode

10. Set Language

11. Set Start Parameter 22. Relay Test

13. Set Safety Frequency

14. Insulation Resistance

15. Set Reactive Power

16. Set Power Derate

17. Reflux Power

18. MPPT Scan

19. Logic Interface

20. Set Power Ratio

21. Relay Command

1. Set Time

Users long press the button to enter “1.Enter Setting” interface, long press the button to enter main setting interface. Enter “1. Set Time” by long press the button, then can start to set up time.

Time set from year, month, day, minutes, and seconds in turns, Short press the button to change different value, Set each value is need to long press the button to confirm setting. “success” is displayed if the setting time is correct, “fail” means failure settings.

2. Clear Energy

Users long press the button to enter “1.Enter Setting” interface, long press the button to enter main setting interface. Then Enter “2.Clear Energy” by short press the button to turn the page and long press the button to confirm. Long press the button to enter password 0001 by short press the button to change different value, and then long press the button to start to clear produce. “success” is displayed after settings.

3. Clear Events

Users long press the button to enter “1.Enter Setting” interface, long press the button to enter main setting interface. Enter “3. Clear Events” by short press the button to turn the page and long press the button to confirm. Long press the button and start to clear events. “success” is displayed after settings.

4. Set Country

Users long press the button to enter “1.Enter setting” interface, long press the button to enter main setting interface. Enter “4.Set Country ” by short press the button to turn the page and long press the button to confirm. If it's shown “set disable“ on the screen, then you can NOT choose the operating country, you should enable country setting through “6. Enable Set

REFUone 1.6K-1T … 3.3K-1T

Country“ interface. If it's shown “set Country code?“ on the screen, then long press the button to confirm to start country setting. “Success“ will be shown on the screen after a successful country setting.

Table 8 Country code setting

Code Country

Germany VDE AR-N4105 12

CEI0-21 Internal

Australia

Spain RD1699

Turkey

Denmark

Greece Continent

Netherland

Belgium

UK-G59t

China

France

Code Country

Poland

Germany BDEW

Germany VDE 0126 26

Italy CEI0-16

UK-G83

Greece island

EU EN50438

IEC EN61727

Korea

Sweden

Europe General

CEI0-21 External

33 Ukraine

Code Country

Cyprus

India

Philippines

New Zealand

Brazil

Slovakia VSD

Slovakia SSE

Slovakia ZSD

CEI0-21 In Areti

5. Remote Control

Users long press the button to enter 1.Enter setting” interface, long press the button to enter main setting interface. Enter “5.On-Off Control” by short press the button to turn the page and long press the button to confirm, then enter “Input Password” Setting interface. Long press the button to set passwords (default: 0001), short press the button to change different value, long press the button to next value setting. “Error! Try again” will be displayed for wrong passwords. Long press the button and rekey in the correct passwords. “Success” will be displayed if setting successfully.

6. Enable Set Country

Users long press the button to enter “1.Enter setting” interface, long press the button to enter main setting interface. Enter “6.Enable Set Country” by short press the button to turn the page and long press the button to confirm, then enter “Input Password” Setting interface. Long press the button to set passwords (default: 0001), short press the button to change different value, long press the button to next value setting. “Error! Try again” will be displayed for wrong passwords. Long press the button and rekey in the correct passwords. “Success” will be displayed if setting successfully.

Attention: when inverter working for power generation over 24h, country setting is forbidden, it can only be set after LCD setting. Key in passwords for country setting through LCD (default:

REFUone 1.6K-1T … 3.3K-1T

0001), country setting can be set in 24h after keying in the correct passwords, over 24h, set through LCD again.

7. Set Energy

Users long press the button to enter “1.Enter setting” interface, long press the button to enter main setting interface. Enter “7. Set Energy” by short press the button to turn the page and long press the button to confirm, then enter “Input Password” Setting interface. Long press the button to set passwords (default: 0001), short press the button to change different value, long press the button to next value setting. “Error! Try again” will be displayed for wrong passwords. Long press the button and rekey in the correct passwords then set total energy. “Success” or “fail” is displayed after setting.

8. Set address

Users long press the button to enter “1.Enter setting” interface, long press the button to enter main setting interface. Enter “8. Set address” by short press the button to turn the page and long press the button to confirm enter setting interface. Choose corresponded setting items by short press the button, then long press the button to confirm. “Success” or “fail” is displayed after setting.

9. Set Input mode

Function is not applicable for this inverter.

10. Set Language

Users long press the button to enter “1.Enter setting” interface, long press the button to enter main setting interface. Enter “10. Set Language” by short press the button to turn the page and long press the button to confirm enter setting interface. Choose corresponded setting items by short press the button. “Success” or “fail” is displayed after setting.

11. Set Start Parameter

User can change the start parameter by the LCD. First the User need to copy the. TXT file which is used to change the start parameter to the USB Stick.

Users long press the button to enter “1.Enter setting” interface, long press the button to enter main setting interface. Enter “11. Set Start Parameter” by short press the button to turn the page and long press the button to confirm, then enter “Input Password” Setting interface. Long press the button to set passwords (default: 0001), short press the button to change different value, long press the button to next value setting. “Error! Try again” will be displayed for wrong passwords. Long press the button and rekey in the correct passwords. “Success” will be displayed if setting successfully.

12. Set Safety Voltage

User can change the Voltage protection point by the LCD. First the User need to copy the TXT file which is used to change the Voltage protection point to the USB Stick.

Users long press the button to enter “1.Enter setting” interface, long press the button to enter main setting interface. Enter “12. Set Safety Voltage” by short press the button to turn the page and long press the button to confirm, then enter “Input Password” Setting interface. Long press the button to set passwords (default: 0001), short press the button to change different value, long press the button to next value setting. “Error! Try again” will be displayed for wrong passwords. Long press the button and rekey in the correct passwords. “Success” will be displayed if setting successfully.

REFUone 1.6K-1T … 3.3K-1T

13. Set Safety Frequency

User can change the Frequency protection point by the LCD. First the User need to copy the TXT file which is used to change the Frequency protection point to the USB Stick.

Users long press the button to enter “1.Enter setting” interface, long press the button to enter main setting interface. Enter “13. Set Safety Frequency” by short press the button to turn the page and long press the button to confirm, then enter “Input Password” Setting interface. Long press the button to set passwords (default: 0001), short press the button to change different value, long press the button to next value setting. “Error! Try again” will be displayed for wrong passwords. Long press the button and rekey in the correct passwords. “Success” will be displayed if setting successfully.

14. Insulation Resistance

User can change the Insulation protection point by the LCD. First the User need to copy the TXT file which is used to change the Insulation protection point to the USB Stick.

Users long press the button to enter “1.Enter setting” interface, long press the button to enter main setting interface. Enter “14. Set Insulation” by short press the button to turn the page and long press the button to confirm, then enter “Input Password” Setting interface. Long press the button to set passwords (default: 0001), short press the button to change different value, long press the button to next value setting. “Error! Try again” will be displayed for wrong passwords. Long press the button and rekey in the correct passwords. “Success” will be displayed if setting successfully.

15. Reactive Power

Users long press the button to enter “1.Enter Setting” interface, long press the button to enter main setting interface. Enter “15.Set Reactive” by short press the button to turn the page and long press the button to confirm, then enter “Input Password” Setting interface. Long press the button to set passwords (default: 0001), short press the button to change different value, long press the button to next value setting. “Error! Try again” will be displayed for wrong passwords. Long press the button and rekey in the correct passwords. “Success” will be displayed if setting successfully.

16. Set Power Derate

Users long press the button to enter “1.Enter Setting” interface, long press the button to enter main setting interface. Enter “16.Set Power Derate” by short press the button to turn the page and long press the button to confirm, then enter “Input Password” Setting interface. Long press the button to set passwords (default: 0001), short press the button to change different value, long press the button to next value setting. “Error! Try again” will be displayed for wrong passwords. Long press the button and rekey in the correct passwords. “Success” will be displayed if setting successfully.

17. Reflux Power

Users long press the button to enter “1.Enter Setting” interface, long press the button to enter main setting interface. Enter “17.Reflux Power ” by short press the button to turn the page and long press the button to confirm, then enter “Input Password” Setting interface. Long press the button to set passwords (default: 0001), short press the button to change different value, long press the button to next value setting. “Error! Try again” will be displayed for wrong passwords. Long press the button and rekey in the correct passwords. “Success” will be displayed if setting successfully.

REFUone 1.6K-1T … 3.3K-1T

18. MPPT Scan

Users long press the button to enter 1.Enter setting” interface, long press the button to enter main setting interface. Enter 18.MPPT Scan” by short press the button to turn the page and long press the button to confirm, then enter “Input Password” Setting interface. Long press the button to set passwords (default: 0001), short press the button to change different value, long press the button to next value setting. “Error! Try again” will be displayed for wrong passwords. Long press the button and rekey in the correct passwords. “Success” will be displayed if setting successfully.

19. Logic Interface

Users long press the button to enter 1.Enter setting” interface, long press the button to enter main setting interface. Enter 19.Logic Interface” by short press the button to turn the page and long press the button to confirm, then enter “Input Password” Setting interface. Long press the button to set passwords (default: 0001), short press the button to change different value, long press the button to next value setting. “Error! Try again” will be displayed for wrong passwords. Long press the button and rekey in the correct passwords. “Success” will be displayed if setting successfully.

20. Set Power Ratio (only if country is set at 10)

Users long press the button to enter 1.Enter setting” interface, long press the button to enter main setting interface. Enter “20.Set Power Ratio” by short press the button to turn the page and long press the button to confirm, then enter “Input Password” Setting interface. Long press the button to set passwords (default: 0001), short press the button to change different value, long press the button to next value setting. “Error! Try again” will be displayed for wrong passwords. Long press the button and rekey in the correct passwords. “Success” will be displayed if setting successfully.

21. Relay Command

Users long press the button to enter “1.Enter setting” interface, long press the button to enter main setting interface. Enter “21. Relay Command” by short press the button to turn the page and long press the button to confirm, then enter “Relay Command setting “interface. Choose corresponded setting items by short press the button, then long press the button. “Success” or “fail” is displayed after setting.

22. Relay Test

Users long press the button to enter “1.Enter setting” interface, long press the button to enter main setting interface. Enter “22. Relay Test” by short press the button to turn the page, then long press the button and start test relay. “Success” will be displayed if setting successfully.

(B) “Event List” Interface

Event List is used to display the real-time event records, including the total number of events and each specific ID No. and happening time. User can enter Event List interface through main interface to check details of real-time event records, Event will be listed by the occurrence time, and recent events will be listed in the front. Please refer to below picture. Long press the button and short press the button to turn the page in standard interface, then enter into “2.Event List” interface.

REFUone 1.6K-1T … 3.3K-1T

1. Current event 2. History event

Fault information 01 ID04 06150825

3.SystemInfo

2. Event List

( Display the event sequence number, event ID

number, and event occurrence time )

1. Inverter Type

2. Serial Number

3. Software Version

4. Hardware Version

5. Country

6. Modbus Address

7. Input Mode

8. Power Factor

12. Power Ratio

9. Reflux Power

10. Safety Parameters

11. MPPT Scan

(The country is set at 10)

13. Relay Command

1. Inverter Type

Users short press the button to enter “3. SystemInfo” interface, then long press the button to enter into system information checking interface, then short press the button to enter into “1. Inverter Type”, then long press the button the Inverter Type will be displayed.

2. Serial number

Users short press the button to enter “3. SystemInfo“ interface, then long press the button to enter into system information checking interface, then short press the button to enter “2. Serial Number”, then long press the button, the serial number will be displayed.

3. Software Version

Users short press the button to enter “3. SystemInfo” interface, then long press the button to enter into system information checking interface, then short press the button to enter into “3. SoftVersion”, then long press the button, the Software Version will be displayed.

4. Hardware Version

Users short press the button to enter “3. SystemInfo” interface, then long press the button to enter into system information checking interface, then short press the button enter into “4. HardVersion”, then long press the button, the Hardware Version will be displayed.

REFUone 1.6K-1T … 3.3K-1T

5. Country

Users short press the button to enter “3. SystemInfo” interface, then long press the button to enter into system information checking interface, then short press the button enter into “5. Country”, then long press the button, the Country will be displayed.

6. Modbus Address

Users short press the button to enter “3. SystemInfo” interface, then long press the button to enter into system information checking interface, then short press the button enter into “6.Modbus Address”, then long press the button, the Modbus Address will be displayed.

7. Input Mode

The function is not applicable for this inverter.

8. Power factor

Users short press the button to enter “3. SystemInfo” interface, then long press the button to enter into system information checking interface, then short press the button enter into “8. Power Factor”, then long press the button, the Power Factor will be displayed.

9. Reflux Power

Users short press the button to enter “3. SystemInfo” interface, then long press the button to enter into system information checking interface, then short press the button enter into “9. Reflux Power”, then long press the button, the Reflux Power will be displayed.

10. Safety Parameters

Users short press the button to enter “3. SystemInfo” interface, then long press the button to enter into system information checking interface, then short press the button enter into “10.Safety Paras”, then long press the button, the Safety Paras will be displayed.

11. MPPT Scan

Users short press the button to enter “3. SystemInfo” interface, then long press the button to enter into system information checking interface, then short press the button enter into “11.MPPT Scan”, then long press the button, the information of MPPT Scan will be displayed.

12. Power Ratio (The country is set at 10)

Users short press the button to enter “3. SystemInfo” interface, then long press the button to enter into system information checking interface, then short press the button enter into “12. Power Ratio”, then long press the button, the Power Ratio will be displayed.

13. Relay Command

Users short press the button to enter “3. SystemInfo” interface, then long press the button to enter into system information checking interface, then short press the button enter into “13. Relay Command”, then long press the button, the Relay Command Mode will be displayed.

(D) Display Time

Long press the button and short press the button to turn the page in the standard user interface to enter into “4.Display Time”, then long press the button to display the current system time.

(E) Software Update

Long press the button and short press the button to turn the page in the standard user interface to enter into “5. Software Update”. Long press the button to enter into the “input

REFUone 1.6K-1T … 3.3K-1T

password” interface. Now long press the button to input the password (initial passwords is

0715). Short press the button to change the value, then long press the button to confirm the current value of input and enter the next digit of the value. When ready, the LCD will display “Error! Try again”, if the password is wrong. You should then re-enter your password. If the password is correct, the update process begins.

6.4

The REFUone inverters offer software upgrade via USB flash drive to maximize inverter performance and avoid inverter operation error caused by software bugs.

(A) Procedure

Step 1:

cover as the following picture. If the RS485 line has been connected, be sure to release the waterproof nut. Make sure the communication line is no longer the force. Then remove the waterproof cover. In order to avoid loosening the communication plug which has been connected.

Update Software

First, turn off the DC and AC breaker, and then remove the communication waterproof

Step 2:

Step 3:

the file, please decompressing file and cover the original file in USB flash drive.

Step 4:

Step 5:

“5.Software Update” in the LCD display program (see chapter 6.1 section E).

Step 6:

original password is 0715.

Step 7:

update succeeds, the LCD will display “Update DSP1 Success“, otherwise it shows “Update DSP1 Fail“; if slave DSP update succeeds, the LCD will display “Update DSP2 Success“, otherwise display “UpdateDSP2 Fail“.

Step 8:

the DC breaker again and continue to update from Step 5

Step 9:

off, then turn on the DC breaker and AC breaker again. The inverter enters the operating state. The user can check the current software version in Systemlnfo - 3. SoftVersion.

Insert the USB flash drive into the computer.

REFU will send the Software code to the user who needs to update. After user receive

Insert the USB flash drive into the USB interface.

Then turn on DC switch and enter into the online upgrade to the main menu

Input the password, if password is correct, and then begin the update process. The

The system updates the main DSP, slave DSP and ARM processor. If the main DSP

If Fail, please turn off the DC breaker, wait for the LCD screen to turn off, then turn on

After the update is completed, turn off the DC breaker, wait for the LCD screen to turn

REFUone 1.6K-1T … 3.3K-1T

Trouble shooting and maintenance

Outlines of this chapter

This topic describes how to perform daily maintenance and troubleshooting to ensure longterm proper operation of the inverter.

7.1

This section contains information and procedures for solving possible problems with the inverter.

This section helps users to identify the inverter fault. Please read the following procedures carefully:

Check the warning, fault messages or fault codes shown on the inverter screen, record all the fault information.

If there is no fault information shown on the screen, check whether the following requirements are met:

Follow the steps below to view recorded problems:

Trouble shooting

•

Is the inverter mounted in a clean, dry place with good ventilation?

•

Is the DC switch turned ON?

•

Are the cables adequately sized and short enough?

•

Are the input and output connections and wiring in good condition?

•

Are the configuration settings correct for the particular installation?

•

Are the display panel and the communication cables properly connected and undamaged?

Long press the button to enter the main menu from the standard interface. Select “ 2. Event List ” then long press the button to enter event list.

7.1.1

Table 9 Event list

Event

List No.

ID01 GridOVP

ID02 GridUVP

ID03 GridOFP

Event List information

Event List Name Event List description Solution

The power grid voltage is too high

The power grid voltage is too low

The power grid frequency is too high

If the alarm occurs occasionally, the possible cause is that the electric grid is abnormal occasionally. Inverter automatically returns to normal operating status when the electric grid is back to normal.

If the alarm occurs frequently, check whether the grid voltage/frequency is within the acceptable range. If no, contact technical support. If yes, check the AC circuit breaker and AC wiring of the inverter.

If the grid voltage/frequency is within the acceptable range and AC wiring is correct, while the alarm occurs repeatedly, contact technical support to change the grid over-voltage, under-voltage, over- frequency,

REFUone 1.6K-1T … 3.3K-1T

Event

List No.

ID04 GridUFP

ID05 PVUVP

ID09 PvOVP

Event List Name Event List description Solution

The power grid frequency is too low

The input voltage is too low

The input voltage is too high

under-frequency protection points after

Obtaining approval from the local electrical grid operator.

Check whether too few PV modules are series connected in a PV string, thus the voltage (Vmp) of the PV string is lower than the minimum operating voltage of inverter. If yes, adjust the number of series connected PV modules to increase the voltage of the PV string to fit the input voltage range of inverter. Inverter automatically returns to normal operating status after correct adjustments.

Check whether too many PV modules are series connected in a PV string, thus the voltage (Voc) of the PV string is higher than the maximum input voltage of inverter. If yes, adjust the number of series connected PV modules to decrease the voltage of the PV string to fit the input voltage range of inverter. Inverter automatically returns to normal operating status after correct adjustments.

ID10 IpvUnbalance

ID11 PvConfigSetWrong

ID12 GFCIFault

ID14 HwBoostOCP

ID15 HwAcOCP

ID16 AcRmsOCP

Input current is not balanced

Incorrect input mode

GFCI Fault

The input current is too high, and h as happen hardware protection

The grid current is too high, and has happen hardware protection

The grid current is too high

Check the input mode (parallel mode/ independent mode) setting of inverter according to Section 0. Input Mode of this user manual, If it’s incorrect, change it according to Section 0. Set Input mode of this manual.

If the fault occurs occasionally, the possible cause is that the external circuits are abnormal occasionally. Inverter automatically returns to normal operating status after the fault is rectified.

If the fault occurs frequently and lasts a long time, check whether the insulation resistance between the PV array and earth (ground) is too low, then check the insulation conditions of PV cables.

Check whether the input current is higher than the maximum input current of inverters, then check the input wiring, if both are correct, please contact technical support.

ID15-ID24 are internal faults of inverter, turn OFF the “DC switch”, wait for 5 minutes, then turn ON the “DC switch”. Check whether the fault is rectified. If no, please contact technical support.

ID17 HwADFaultIGrid

ID18 HwADFaultDCI

The grid current sampling error

The DCI sampling error

REFUone 1.6K-1T … 3.3K-1T

Event

List No.

ID19 HwADFaultVGrid

ID20 GFCIDeviceFault

ID21 MChip_Fault

ID22 HwAuxPowerFault

ID23 BusVoltZeroFault

ID24 IacRmsUnbalance

ID25 BusUVP

Event List Name Event List description Solution

The grid voltage sampling error

The GFCI sampling error

The master chip fault

The auxiliary voltage error

The bus voltage sampling error

The Output current is not balanced

The bus voltage Is too low

If the PV array configuration is correct (no ID05 fault), the possible cause is that the solar irradiance is too low. Inverter automatically returns to normal operating status after the solar irradiance returns to normal level.

ID26 BusOVP

ID27 VbusUnbalance

ID28 DciOCP

ID29 SwOCPInstant

ID30 SwBOCPInstant

The bus voltage Is too high

The bus voltage is not balanced

The Dci is too high

The grid current is too high

The input current is too high

ID26-ID27 are internal faults of inverter, turn OFF the “DC switch”, wait for 5 minutes, then turn ON the “DC switch”. Check whether the fault is rectified. If no, please contact technical support.

Check the input mode (parallel mode/ independent mode) setting of inverter according to Section 0 (Input Mode) of this user manual, If it’s incorrect, change it according to Section 0. Set Input mode of this manual.

If the input mode is correct, turn OFF the “DC switch”, wait for 5 minutes, then turn ON the “DC switch”. Check whether the fault is rectified. If no, please contact technical support, If it’s incorrect, change it according to Section 6.3 (A) 10.Set Input mode of this manual.

Internal faults of inverter, turn OFF the “DC switch”, wait for 5 minutes, then turn ON the “DC switch”. Check whether the fault is rectified. If no, please contact technical support.

Check whether the input current is higher than the maximum input current of inverters, then check the input wiring, if both are correct, please contact technical support.

ID49 Consistent

Fault_VGrid

The grid voltage sampling value between the master DSP and slave DSP is not consistent

ID49-ID55 are internal faults of inverter, turn OFF the “DC switch”, wait for 5 minutes, then turn ON the “DC switch”. Check whether the fault is rectified. If no, please contact technical support.

REFUone 1.6K-1T … 3.3K-1T

Event

List No.

ID50 Consistent

ID51 Consistent

ID52 Consistent

ID53 SpiCommLose

ID54 SciCommLose

Event List Name Event List description Solution

Fault_FGrid

Fault_DCI

Fault_GFCI

The grid f requency sampling value between the master DSP and slave DSP is not consistent

The DCI sampling value between the master DSP and slave DSP is not consistent

The GFCI sampling value between the master DSP and slave DSP is not consistent

The spi communication between the master DSP and slave DSP is fault

The Sci communication between the control board communication board is fault

ID55 RelayTestFail

ID56 PvIsoFault

ID57

ID58 OverTemp

ID59 OverTemp

ID65 Unrecover

ID66

ID67 Unrecover

OverTemp Fault_Inv

Fault_Boost

Fault_Env

HwAcOCP

Unrecover BusOVP

IacRms Unbalance

The relays fault

The insulation resistance is too low

The inverter temp is too high

The Boost temp is too high

The environment temp is too high

The grid current is too high,and has cause unrecoverable hardware fault

The bus voltage is too high, and has cause unrecoverable fault

The grid current is unbalance, and has cause unrecoverable fault

Check the insulation resistance between the PV array and earth(ground), if a short circuit occurs, rectify the fault.

Ensure the installation position and installation method meet the requirements of Section 3.4 of this user manual.

Check whether the ambient temperature of the installation position exceeds the upper limit. If yes, improve ventilation to decrease the temperature.

ID65-ID70 are internal faults of inverter, turn OFF the “DC switch”, wait for 5 minutes, then turn ON the “DC switch”. Check whether the fault is rectified. If no, please contact technical support.

REFUone 1.6K-1T … 3.3K-1T

Event

List No.

ID68 Unrecover

ID69

ID70

ID71 Unrecover

ID74 Unrecover

ID75 Unrecover

Event List Name Event List description Solution

IpvUnbalance

Unrecover Vbus Unbalance

Unrecover OCPInstant

PvConfigSet Wrong

IPVInstant

WRITEEEPROM

The input current is unbalance, and has cause unrecoverable

The bus voltage Is unbalance, and has cause unrecoverable fault

The grid current is too high, and has cause unrecoverable fault

Incorrect input mode Check the input mode (parallel mode/ independent

mode) setting of inverter according to Section 0 (Input Mode) of this user manual, If it’s incorrect, change it according to Section 0. Set Input mode of this manual.

The input current is too high,and has happen unrecoverable fault

The EEPROM is unrecoverable

ID74-ID77 are internal faults of inverter, turn OFF the “DC switch”, wait for 5 minutes, then turn ON the “DC switch”. Check whether the fault is rectified. If no, please contact technical support.

ID76 Unrecover

READEEPROM

ID77 UnrecoverRelayFail

ID81 OverTempDerating

ID82 OverFreqDerating

ID83 RemoteDerating

ID84 RemoteOff

The EEPROM i s unrecoverable

Relay has happen permanent fault

the inverter has derated because of the temperature is too high

the inverter has derated because of the grid frequency too high

The inverter has derated by the Remote control

The inverter has shut down because by the Remote control

Ensure the installation position and installation method meet the requirements of Section 0 of this user manual.

Check whether the ambient temperature of the installation position exceeds the upper limit. If yes, improve ventilation to decrease the temperature.

Inverter automatically reduce the output power when the frequency of electrical grid is too high.

Inverter records ID83 in case of remote power derating operation. Check the wiring of remote input and output control signal port on the communication board according to Section 4.5 of this user manual.

inverter records ID84 in case of remote shutdown operation. Check the wiring of remote input and output control signal port on the communication board according to Section 4.5 of this user manual.

ID94 Software version is

not consistent

The Software between the control board and

Contact technical support to upgrade software.

REFUone 1.6K-1T … 3.3K-1T

Event

List No.

ID95 Communication

ID96

ID97 Invalid Country

ID98 SD fault

7.2

Event List Name Event List description Solution

the communication board is not consistent

board EEPROM fault

RTC clock chip anomaly

The Communication board EEPROM is fault

RTC clock chip is fault

The Country is InValid Check the country setting according to Section 0

The SD card is fault Please replace the SD card.

ID95~ID96 are internal faults of inverter, turn OFF the “DC switch”, wait for 5 minutes, then turn ON the “DC switch”. Check whether the fault is rectified. If no, please contact technical support.

(Country) of this user manual, If it’s incorrect, change it according to Section 0. Set Country Code of this manual.

Maintenance

Inverters generally do not need any daily or routine maintenance. The heat sink should not be blocked by dust, dirt or any other item.

Before the cleaning, make sure that the DC SWITCH is turned OFF and the circuit breaker between inverter and electrical grid is turned OFF. Wait at least for 5 minutes before the cleaning.

7.2.1

Inverter cleaning

Please clean the inverter with an air blower, a dry & soft cloth or a soft bristle brush. Do NOT clean the inverter with water, corrosive chemicals, detergent, etc.

7.2.2

Heat sink cleaning

For the long-term proper operation of inverters, ensure there is enough space around the heat sink for ventilation, check the heat sink for blockage (dust, snow, etc.) and clean them if they exist. Please clean the heat sink with an air blower, a dry & soft cloth or a soft bristle brush. Do NOT clean the heat sink with water, corrosive chemicals, detergent, etc.

REFUone 1.6K-1T … 3.3K-1T

Technical data

Outlines of this chapter

This topic lists the technical specifications for all REFUone inverters.

8.1

Technical Data REFUone 1.6K-1T REFUone 3.3K-1T

Max. input power (W)

Number of independent MPPT

Number of DC inputs

Max. input voltage (V)

Start-up input voltage (V)

Rated input voltage (V)

Operating input voltage range (V)

Full power MPPT voltage range (V)

Max. MPPT current (A)

Max. DC short-circuit current (A)

8.2

Technical Data REFUone 1.6K-1T REFUone 3.3K-1T

Rated power (@230V, 50Hz) (W)

DC Data

2,200 4,500

500 600

360

50 … 500 50 … 600

150 … 450 300 … 550

AC Data

1,600 3,300

Max AC power (VA)

Nominal Grid voltage (V)

Grid voltage range (V)

Grid frequency range (Hz)

Active power adjustable range (%)

Rated output current (A)

Max output current (A)

THDi (%)

Power factor

1,600 3,300

220, 230, 240

180 … 276 (According to local standard)

44 … 55 / 54 … 66 (According to local standard)

0 … 100

7.0 13.0

7.7 16.0

< 3

1 (adjustable +/- 0.8)

REFUone 1.6K-1T … 3.3K-1T

8.3

Technical Data REFUone 1.6K-1T REFUone 3.3K-1T

Max efficiency (%)

Weighted eff. (EU/CEC) (%)

Self-consumption at night (W)

Feed-in start power (W)

MPPT efficiency

DC switch

Safety protection

Surge protection

Communication Ports

Efficiency, Protection and Communication

97.5 97.7

96.9 97.2

< 1

> 99.9

integrated

Anti-islanding, DC reverse polarity, Overtemp., leakage

current, overvoltage, overcurrent, earth fault

DC and AC: MOV Type III standard

Standard: RS485, USB, WiFi

Optional: GPRS, Ethernet

8.4

Technical Data REFUone 1.6K-1T REFUone 3.3K-1T

General Data

Ambient temperature range (°C)

Topology

Degree of protection

Allowable relative humidity range (%)

Max operating latitude (m above Sea Level)

Noise (dB)

Weight (kg)

Cooling

Dimension (H x W x D) (mm)

Certification

Warranty

-30 … +60 (above 45 derating)

Transformerless

IP65

0 … 100

2000

< 25

5.5 6.3

natural convection

303 x 261 x 118 321 x 261 x 132

INMETRO (ABNT NBR 16149:2013, ABNT NBR

16150:2013,

ABNT NBR IEC 62116:2012), IEC 62116, IEC 61727,

IEC 61683, IEC 60068 (1,2,14,30), IEC 62109-1/2, VDE

0126-1-1:2013

5 years

REFUone 1.6K-1T … 3.3K-1T

REFU Elektronik GmbH offers 5 years product warranty for REFUone inverters from date of installation. However, the warranty period can’t exceed 66 months from the date of delivery of the inverter. During the warranty period, REFU Elektronik GmbH guarantees normal operation of the inverter.

If during the warranty period, the inverter develops fault, please contact your installation contractor or supplier. In case of faults falling within manufacturers’ responsibility, REFU Elektronik GmbH will provide service and maintenance free of any charge.

Quality Assurance

Disclaimer

•

Use of REFU inverters for any other purpose than its designated use

•

Faulty system design or installation;

•

Improper operation;

•

Wrong protection settings of the inverter; Unauthorized modification of the inverter;

•

Damage caused by external factors or force majeure (violent or stormy weather, lightning, over- voltage, fire, earthquake, tsunami etc.).

REFUone 1.6K-1T … 3.3K-1T

Technical Support

If you have followed the Troubleshooting and could not solve your issue, you can contact REFU’s service team as follows:

Brazil: +55 (11) 4708-7355

Germany: +49 (7121) 4332-333

Webpage: www.refu.com/en/refuone

Download of Data sheets, Manuals, Certificates, Firmware Update Files etc.

E-mail: service.brasil@refu.com

REFUone 1.6K-1T … 3.3K-1T

REFU Elektronik GmbH

Marktstraße 185

D-72793 Pfullingen

Phone: +49 (0)7121-4332 0

Fax: +49 (0)7121-4332 140

Mail: info@refu.com

Version 1 (No. 982075) 801 Series (1T) October 2019

REFU 1T Series, REFUone 1.6K-1T, 801P3K3.100, REFUone 3.3K-1T, 801P1K6.100 Operating Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual