AEG PV.500-MH User Manual

Operating Instructions

Protect PV.500-MH

AEG Power Solutions GmbH, Warstein-Belecke
Department: PS AED
Revision: 00
Revision date: 25.04.2012 / Schenuit
Released: 25.04.2012 / Aranda

Document no. 8000043212 BAL, en

Protect PV.500-MH Operating Instructions

 AEG Power Solutions GmbH
Emil-Siepmann-Strasse 32
59581 Warstein
Germany

 [phone]
Fax: [phone]
E-mail: [e-mail]
Internet: http://www.aegps.com

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Table of Contents

1 Information on How to Use these Instructions ............... 6

1.1 General Information ............................................................. 6

1.2 Target Groups ..................................................................... 7

1.3 Explanations of Target Groups ............................................ 7

1.3.1 Obligations of the Equipment Operator ............................... 7

1.3.2 Skilled Personnel Skills and Training .................................. 8

1.4 Storing Instructions .............................................................. 9

2 Explanation of Symbols and Safety Instructions ......... 10

2.1 Explanation of Symbols ..................................................... 10

2.2 Safety Instructions ............................................................. 11

2.2.1 Signal Words Used ............................................................ 11

2.2.2 Hazard Symbols Used ....................................................... 11

2.2.3 Signs Containing Orders for Personal Protective Equipment12

2.2.4 Abbreviations ..................................................................... 13

2.3 Emergency Procedure (e.g. in the Event of a Fire) ........... 13

2.4 Safety Awareness ............................................................. 13

2.5 Particular Dangers associated with Photovoltaic Systems 14

2.6 Safety Signs and Warning Notices on the Equipment ....... 15

2.7 Safety and Protection Devices for the Equipment ............. 15

2.7.1 Protective Covers .............................................................. 15

2.7.2 Lockable Equipment Doors ............................................... 16

2.7.3 Guard ................................................................................ 16

2.8 Residual Hazards .............................................................. 16

2.8.1 Electrical Hazards ............................................................. 17

2.8.2 Risks Due to Moving Parts ................................................ 18

2.8.3 Fire-Related Risks ............................................................. 18

2.8.4 Risks due to Loss of Control ............................................. 19

2.8.5 Risks from Maintenance and Repair Work ........................ 19

3 Product Details ................................................................ 20

3.1 Product Description ........................................................... 20

3.2 Dimensions and Views ...................................................... 21

3.3 Appropriate Use ................................................................ 21

3.4 Inappropriate Use .............................................................. 21

3.5 Standards, Directives and CE Mark .................................. 22

3.6 Nameplate ......................................................................... 22

3.7 Technology ........................................................................ 23

3.8 Operating Elements ........................................................... 24

4 System Description ......................................................... 25

4.1 Individual Operation .......................................................... 25

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5 System Function ............................................................. 26

5.1 Description of Sequence Control ....................................... 26

5.1.1 The "OFF" Status .............................................................. 26

5.1.2 The "Waiting for Feed Conditions" Status ......................... 26

5.1.3 The "Operation" Status ...................................................... 27

5.1.4 The "Waiting" Status.......................................................... 27

5.1.5 The "Fault" Status.............................................................. 28

5.1.6 The "Night" Status ............................................................. 28

5.1.7 Sequence Control During the Course of the Day .............. 28

5.1.8 Sequence Control Parameters .......................................... 30

5.2 Description of Fan Control ................................................. 31

5.2.1 General .............................................................................. 31

5.2.2 Fan Control, Cabinet Fan .................................................. 31

5.2.3 Cabinet Fan Control Parameters ....................................... 32

5.2.4 Fan Control, Inverter Stack Fan ........................................ 32

5.2.5 Parameters of Inverter Stack Fan Control ......................... 33

5.3 Insulation Monitoring and Earthing of PV Cells ................. 33

5.3.1 General .............................................................................. 33

5.3.2 Operation With Monocrystalline or Polycrystalline Solar
Cells 35

5.3.3 Operation with Thin-Film Solar Cells ................................. 35

5.3.4 Insulation Monitoring Parameters ...................................... 36

5.4 MPP Tracker ..................................................................... 36

6 Monitoring Systems, Messages and Faults .................. 37

6.1 General Information ........................................................... 37

6.2 Table of Faults ................................................................... 38

7 Interfaces ......................................................................... 42

7.1 Communication Interface .................................................. 42

7.1.1 General .............................................................................. 42

7.1.2 Technical Data .................................................................. 43

7.1.3 Structure of the MultiCom CCC Interface ......................... 44

7.1.4 Configuration ..................................................................... 47

7.1.4.1 Configuration Preparations ................................................ 48

7.1.4.2 Configuring the Modbus Protocol ...................................... 50

7.1.4.3 Configuring Modbus Data Transmission ........................... 51

7.2 COM Server ...................................................................... 52

7.2.1 General .............................................................................. 52

7.2.2 Network Connection .......................................................... 52

7.2.3 Structure of the COM Server (internally wired to A93) ...... 52

7.2.4 Installation of the COM Server .......................................... 53

7.2.5 Network Integration Configuration ..................................... 54

7.2.6 Configuration of the Virtual COM Port ............................... 54

7.3 Remote Signalling ............................................................. 55

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8 Graphical Display and Operation Unit ........................... 57

8.1 General Information ........................................................... 57

8.1.1 Signalling ........................................................................... 58

8.1.2 Keyboard Operation .......................................................... 58

8.2 Start-up .............................................................................. 59

8.3 Menu Structure .................................................................. 60

8.3.1 Menu Tree ......................................................................... 60

8.3.2 Main Menu ......................................................................... 60

8.3.3 Operating Display .............................................................. 61

8.3.4 Status/Measured Values ................................................... 66

8.3.5 Blocking ............................................................................. 67

8.3.6 Fault History ...................................................................... 68

8.3.7 Settings ............................................................................. 68

8.3.8 Information ........................................................................ 68

8.3.9 Service .............................................................................. 68

8.3.10 Help ................................................................................... 68

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1 Information on How to Use these Instructions

This chapter contains general information about these instructions
and the people they are intended for.
The Protect PV.500 with two control cabinets (+DCD/ACD, +INV)
is referred to as 'equipment' in the rest of the instructions. The pre­cise name (PV.500) cannot be avoided in some situations. In such
cases the equipment is referred to as the PV.500 equipment or the
individual control cabinets are mentioned.

1.1 General Information

Validity

These instructions correspond to the technical specifications of the
equipment at the time of publication. The contents of these instruc­tions do not constitute a subject matter of the contract, but are for
information purposes only.

AEG Power Solutions GmbH reserves the right to make modifica­tions to the content and technical data in these instructions without
prior notice. AEG Power Solutions GmbH cannot be held liable for
any inaccuracies or inapplicable information in these instructions,
which came about as a result of changes to the content or tech­nology applied after this equipment was supplied, as there is no
obligation to continuously update the data and maintain its validity.

Warranty

Our goods and services are subject to the general conditions of
supply for products in the electrical industry, and our general sales
conditions. We reserve the right to alter any specifications given in
these instructions, especially with regard to technical data, opera­tion, dimensions and weights. AEG Power Solutions GmbH will re­scind all obligations such as warranty agreements, service con­tracts, etc. entered into by AEG Power Solutions GmbH or its rep­resentatives without prior notice in the event of maintenance and
repair work being carried out with anything other than original AEG
Power Solutions GmbH spare parts or spare parts purchased from
AEG Power Solutions GmbH.

Complaints

In the event of complaints, please contact us within eight days of
receipt of goods and provide the following details:

Type designation

Serial number

Nature of complaint

Period of use

Ambient conditions

Any claims submitted after this point cannot be considered.

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Handling

These instructions are structured so that all work necessary for
operation can be performed by appropriately qualified skilled per­sonnel.

Illustrations are provided to clarify and facilitate certain steps.
If danger to personnel and equipment cannot be ruled out in the

case of certain work, it is highlighted accordingly by pictograms
explained in Chapter 2, Safety Regulations.

1.2 Target Groups

This document explains which groups these instructions are in­tended for and the obligations of these groups. Definitions of staff
requirements are also provided.

Every care has been taken in drafting these instructions. Should
you notice any errors, please contact the manufacturer immediate­ly.

So that the instructions remain up to date, please remember to in­sert any supplements received from AEG Power Solutions GmbH.

1.3 Explanations of Target Groups

These instructions are intended for various target groups:

 The equipment operator or the person appointed by him (the

party responsible for the equipment)

 The skilled personnel responsible for using the equipment

1.3.1 Obligations of the Equipment Operator

The equipment operator or the person appointed by him/her (the
party responsible for the equipment) is responsible for the safety of
personnel and for the safety, function and availability of the equip­ment. These factors depend on compliance with the safety instruc­tions. Compliance with the safety instructions is required at all
times.

To ensure the safety of personnel, the equipment operator
must:

 Select skilled personnel on the basis of skills and training (

Chapter 1.3.2)

 Make skilled personnel aware of the need for compliance with

regulations ( Chapter 1.3.2)

 Provide skilled personnel with personal protective equipment,

user information and instructions

 Provide skilled personnel with regular briefings about all safety

measures and keep a record of such briefings

 Inform skilled personnel of where fire extinguishers are located

and how to use them

To ensure the safety of the equipment, the equipment opera­tor must:

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 Only operate the equipment in perfect working order and in ac-

cordance with good electrical engineering practice

 Arrange a fault detection check immediately if the equipment

starts to behave differently

 Keep all safety signs and warning notices on the equipment in a

complete and clearly legible condition

 Install fire extinguishers in the immediate vicinity of the equip-

ment

1.3.2 Skilled Personnel Skills and Training

Only trained and qualified skilled personnel may perform the work
described, using tools, equipment and test equipment intended for
the purpose and in perfect working order.

All work is coordinated and monitored by the person responsible
for work. The person responsible for work is directly responsible
for the execution of the work. Before work commences, the person
responsible for work must inform the person responsible for the
equipment and agree on a work schedule with him. The persons
responsible for the work and equipment must be trained and quali­fied skilled personnel and may be one and the same person.

"Trained skilled personnel" means electricians who as a result of
their specialist training:

 Have knowledge and experience of the relevant standards,

regulations, requirements and accident prevention regulations

 Have been instructed in the mode of operation and operating

conditions of the equipment

 Have the ability to assess the effect of any intended work on

the safe operation of this particular equipment
 Can assess the work and recognise and avoid potential risks
Compliance with the safety instructions described is essential for

the protection of skilled personnel and the equipment. Skilled per­sonnel must be aware of and follow these safety instructions.

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Obligations of skilled personnel

Observe the following safety instructions.

 Work on and in electrical equipment is governed by strict rules

in order to avoid electrical accidents. The rules are summarised
in the five rules of safety. You must observe these rules:

1. Disconnect safely.

2. Secure the unit against being switched back on.

3. Verify that all poles are de-energised.

4. Earth and short-circuit the equipment.

5. Provide protection in the form of covers or barriers for any

neighbouring live parts.

 Once work is complete, reverse the five safety rules starting at

number 5 and working back to number 1.

 Read these instructions. Memorise the safety instructions.

( Chapter 2)

 Ensure compliance with the following regulations:
 Accident prevention regulations of the respective country of

destination and the generally valid safety regulations according

to IEC 364.

 BGV A1 (Prevention principles)
 BGV A3 (Electrical systems and equipment)
 BGV A8 (Safety and health protection warnings in the work-

place)

 Report damage to the equipment and electrical installations to

the equipment operator.

 Only use spare parts approved by the manufacturer for mainte-

nance
and repair work.

 Use personal protective equipment (PPE) as intended.

 Check that PPE is in perfect working order and report any de-

fects you notice to the equipment operator.

 Wear a hair net if you have long hair. Do not wear loose cloth-

ing or jewellery.

 Reinstate protection devices (including covers) on completion

of all work on or with the equipment.

 Keep the instructions in the pull-out document pocket.

1.4 Storing Instructions

Store these instructions in an appropriate place. A pull-out docu­ment pocket is located on the inside of the door. These instructions
must be stored together with the equipment.

Should the equipment change hands, include these instructions
when handing it over to the new operator.

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2 Explanation of Symbols and Safety Instructions

All of the symbols and abbreviations used in the text are described
below.

2.1 Explanation of Symbols

This section describes the symbols used in these instructions.

Symbol Meaning

Hazard symbols are triangular and feature a
yellow background, black border and corre­sponding symbol.

Signs containing orders are round and have a
blue background with a white symbol.

Information is indicated by the letter i. These

i

Table 1 Instruction and warning symbols in these operating
instructions

Other symbols and their meanings

Typograph-

ical element Meaning

 This symbol is used for action instructions.

1.

2.

3.

sections contain important information about the
phases of the equipment's service life.

Instructions relating to the environment are
identified by a wheelie bin. Instructions relating
to the environment make reference to mandato­ry requirements set out by regional or national
authorities which are of particular relevance
when disposing of materials used during opera­tion, for example.

Numbers are used for action instructions that
need to be followed in a specific order.

 This symbol is used for bulleted lists.



Table 2 – Other symbols

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References to figures, chapters or tables are
shown using the symbol on the left.

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2.2 Safety Instructions

All safety instructions have the following structure:

SIGNAL WORD

Type and source of hazard

Figure 1 Warning associated with operator action

2.2.1 Signal Words Used

Signal words at the start of safety instructions indicate the type and
severity of the consequences if the measures for avoiding the haz­ard are not taken.

Warning colour Consequences

Symbol

DANGER

WARNING

CAUTION

Consequence(s) of noncompliance

 Measure(s) to avoid hazard.

Warns of a situation posing an immediate
hazard which will lead to death or serious
injury.

Warns of a situation posing a possible haz­ard which may lead to death or serious injury.

Warns of a situation posing a possible haz­ard which may lead to minor injury.

ATTENTION

2.2.2 Hazard Symbols Used

The following hazard symbols are used to illustrate hazards in the
safety instructions.

Symbol Meaning for skilled personnel

warns of possible damage to property and
the environment which could interrupt opera­tion.

General hazard source

Electrical hazard

Risk of falling loads

Risk posed by flammable material

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Risk posed by corrosive vapours and liquids

Risk posed by explosive material

Table 3 – Hazard symbols

2.2.3 Signs Containing Orders for Personal Protective Equipment

The following signs relate to the use of personal protective equip­ment. You are required to comply with them.

Symbol Meaning for skilled personnel

Wear a face shield.

Wear an electrician's safety helmet.

Wear insulating safety boots.

Wear insulating overalls.

Wear insulating gloves with long sleeves.

Wear hearing protection when operating the
equipment.

Table 4 Signs containing orders for PPE

Check that personal protective equipment is in perfect working or­der and report any defects you notice to the equipment operator.

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2.2.4 Abbreviations

Protect PV.500_MH Operating Instructions

The following abbreviations are used in these operating instruc­tions:

DOU Display and operation unit
AC

Alternating current

BGV Regulation set out by Employer's Liability Insurance

Association (Germany)
CAN Controller Area Network
CNF Manufacturing order number
DC

Direct current

DCD/ACD DC/AC control cabinet
DCS Distributed control system
DIN German Standards Institute
EPO Emergency power off (system off)
GCB Generator connection box
Grid Power utility mains (power utility company's mains)
IEC International Electrotechnical Commission
IGBT Insulated gate bipolar transistor
INV Inverter cabinet
PE conductor Protective earth conductor, earthing
PV Photovoltaics
VDE Verband der Elektrotechnik Elektronik Informations-

technik e. V. (German Association for Electrical,

Electronic & Information Technologies)
INV Inverter

2.3 Emergency Procedure (e.g. in the Event of a Fire)

 Never put your own life at risk. Your own safety is paramount.

 Call the fire brigade.

 Call the emergency doctor, if necessary.

 Shut down the equipment using the system stop switch (ensur-

ing your own safety).

2.4 Safety Awareness

The qualified skilled personnel defined in Chapter 1.3.2 are re­sponsible for safety. The member of personnel who is responsible
for the equipment must ensure that only suitably qualified persons
are allowed access to the equipment or permitted within its vicinity.

The following points must be observed:
 All such working procedures which are detrimental to the safe-

ty of persons and the operation of the equipment in any way
are prohibited.

 The equipment may only be operated when in perfect working

order.

 Never remove or render inoperable any safety devices.

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 All necessary operational measures must be initiated prior to

deactivating any safety device in order to perform mainte­nance, repair or any other work on the unit.

Safety awareness also entails informing colleagues of any unsuit­able behaviour and reporting any faults detected to the appropriate
authority or person.

The member of personnel responsible for the equipment must
ensure that:

 The safety instructions and operating instructions are readily

available and are complied with

 The operating conditions and technical data are observed
 Safety devices are used
 The prescribed maintenance work is performed
 Maintenance personnel are informed without delay or the

equipment is shut down immediately in the event of abnormal
voltages or noise, high temperatures, vibrations or any similar
phenomena, so that the cause of this can be determined

2.5 Particular Dangers associated with Photovoltaic Systems

Here you will find information about the additional dangers associ­ated with photovoltaic systems.

An active power source is connected. Depending on the operating
status, the PV cells and the equipment may be live.

Crystalline silicon cells
Crystalline PV cells (silicon cells) usually have an IT system

configuration, i.e. a non-earthed system that will be inadvertently
earthed in the event of an earth fault.

A generator with a complex branched structure can only be shut
down with a great deal of difficulty (in the event of a short circuit,
for example).

DANGER

Contact with voltage! Extremely high DC voltages of
up to 1000 VDC are present.

Risk to life due to electric shock.

 Do not touch live parts.
 Wear personal protective equipment ( Chapter

2.2.3).

Thin-film cells
To prevent corrosion, thin-film cells must be earthed.

Lightning protection

The desired level of protection can only be achieved if a lightning
protection zone concept has been implemented for the building
where the unit is to be installed, in accordance with DIN VDE
0185-4.

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System stop switch

The system stop switch is on the door of the equipment's DC/AC
control cabinet.

The system stop switch is not intended for switching off the equip­ment. It may only be used in an emergency.

The DOU is used, amongst other things, to switch the equipment
on and off.

The system stop switch causes the

- PV inputs

- mains input and

- mains 2 input
to be separated. This interrupts the energy supply.
It does not mean that the unit has been de-energised!

2.6 Safety Signs and Warning Notices on the Equipment

Safety signs and warning notices are located in the vicinity of dan­ger spots. They provide information about electrical hazards and
residual hazards associated with working on and with the equip­ment.

Safety signs and warning notices must always be in perfect condi­tion and clearly legible. You must comply with safety signs and
warning notices whenever you are working on or with the equip­ment.

2.7 Safety and Protection Devices for the Equipment

This section describes all safety and protection devices. Safety
and protection devices protect personnel against hazards which
cannot be countered by safe design.

Safety and protection devices must always be in perfect working
order.

2.7.1 Protective Covers

The equipment is designed so that the live components in the op­erating area are secured with protective covers wherever possible.
The protective covers provide protection against accidental contact
with live parts.

Such protection may only be removed for start-up and for mainte­nance or repair work.

The covers must be replaced immediately on completion of such
work and checked to ensure that they are in perfect working order.

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2.7.2 Lockable Equipment Doors

The equipment doors are fitted with a control cabinet lock. This
prevents unauthorised personnel from accessing the equipment.
The equipment door must be kept closed at all times.

It may be opened for maintenance and repair work.

The space requirement for the opened equipment doors

i

The equipment door must be closed again once maintenance and
repair work is complete.

2.7.3 Guard

The guard forms the equipment's housing. It protects against unin­tended contact with live parts and electromagnetic rays.

It may be removed for maintenance and repair work.

must be taken into account

i

The guard must be put back in place once maintenance and repair
work is complete.

2.8 Residual Hazards

This section describes residual hazards. Despite the measures
taken to ensure safety and protection, the equipment poses resid­ual hazards which cannot be countered by design.

Observe warnings at all times while you are working.

The area around the equipment must be made secure
when the guard is removed.

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2.8.1 Electrical Hazards

DANGER

Contact with voltage!

Risk to life due to electric shock.

 Use dry insulating material to remove the victim from

the live parts.

 Seek medical assistance and inform the control room.
 Disconnect the equipment safely.

DANGER

Electric shock after activating "System stop"!

Parts of the equipment remain live after "System stop"
has been activated (e.g. external voltage present at re­mote signal terminals).

Risk to life due to electric shock.
 Disconnect the equipment safely.

DANGER

Electric shock caused by inverter.

Parts of the equipment remain live after the inverter has
been shut down.

Risk to life due to electric shock.
 Disconnect the equipment safely.

DANGER

Electric shock caused by back feeding.

The input terminals of the equipment may remain live
after the incoming power supply has been interrupted.

Risk to life due to electric shock.

 Disconnect the equipment safely.
 Install back feeding protection (a disconnector) in the

load circuit.

DANGER

Electric shock caused by leakage currents.

The capacitors generate high leakage currents in the
equipment. Conductive parts may be live in the event of
connection errors.

Risk to life due to electric shock.
 Establish a PE conductor connection prior to start-up.

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i

2.8.2 Risks Due to Moving Parts

Using residual-current-operated safety devices (FI) alone
is not permitted.

WARNING

Water in electrical equipment!

Risk to life due to electric shock.

 Do not use water to clean the cabinets.
 Do not place any vessels containing fluids on electrical

equipment.

2.8.3 Fire-Related Risks

Installation of fireproof enclosures (EN 60950-1)
A built-in floor plate ensures that, in the event of a fire, no molten

or burning material can fall out of the equipment.
We recommend having a separate supply/exhaust air connection

for the PV.500 in order to prevent smoke spreading in the event of
a fire.

CAUTION

Risk of injury due to rotating fans!

The fans of the INV control cabinet are freely accessible.

 Never reach into rotating fans.
 When setting up any system, ensure that the fans

cannot be touched.

WARNING

Spread of smoke in electrical operating areas.

 If smoke is detected or a fire breaks out, immediately

disconnect the equipment from the power supply and
inform the maintenance personnel.

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2.8.4 Risks due to Loss of Control

ATTENTION

Failure of remote signalling.

If remote signalling fails or the signal lines are interrupted,
the control room can no longer control the equipment.

In such an event, faults can only be identified locally at the
unit itself.

Failure of external emergency switching device

 Disconnect the equipment safely.

ATTENTION

Failure of the display and operation unit.

If the display and operation unit fails, the skilled personnel
will no longer be able to control the equipment.

In such an event, faults will no longer be displayed.

 Inform the control room.

2.8.5 Risks from Maintenance and Repair Work

Only trained and qualified skilled personnel (as de-

i

scribed above) may work on or around the equipment
while strictly observing the safety regulations.

DANGER

Risk to life due to electric shock.

Potentially fatal voltages are present in the equipment.

 Disconnect safely.

 Secure the unit against being switched back on.

 Verify that all poles are de-energised.

 Earth and short-circuit the equipment.

 Provide protection in the form of covers or barriers for

any neighbouring live parts.

ATTENTION

Damage to property.

 Only use original spare parts.

 Do not intervene in the equipment without authorisa-

tion to do so.

 Observe the safety regulations.

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3 Product Details

The equipment has been designed for solar power plants and pro­vides professional solutions for the use of installations covering
large roofs or in open spaces.

3.1 Product Description

The equipment is a solar inverter (INV) that feeds the electrical
energy produced by the PV cells into a medium-voltage mains
(e.g. 10 kV; 20 kV; 33 kV).

The required mains transformer is not supplied with the unit and
can be ordered as an extra if necessary. It is possible to combine
two Protect PV.500 units to create a 1 MW system. A joint isolating
transformer can be used, with an electrically isolated low-voltage
connection for each Protect PV.500. 1 MW systems can be made
to support "partner operation" to increase their efficiency.

The rating plate, featuring all the relevant data, is located on the
inside of the door.

Figure 2 PV.500 equipment

Important information about equipment documenta­tion

i

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Further descriptions and unit diagrams are included in the
document folder.

Protect PV.500_MH Operating Instructions

3.2 Dimensions and Views

Figure 3 Dimensions and views

3.3 Appropriate Use

Only operate the equipment with the maximum permissible con­nection values stated in the technical data sheet. Any other use or
modification constitutes inappropriate use.

Unauthorised repairs, manipulations or changes made to the
equipment and its safety devices without the manufacturer's ap­proval are not permitted. The manufacturer cannot be held liable
for damage resulting from such repairs, manipulations or changes.

Safety

The equipment will operate reliably and safely subject to compli­ance with the instructions, the operating and equipment specifica­tions and regulations set out by the Employer's Liability Insurance
Association.

3.4 Inappropriate Use

No liability is accepted if the equipment is used for applications not
intended by the manufacturer (= inappropriate use). Inappropriate
use can cause serious or fatal personal injury. The responsibility
for any measures necessary for the prevention of personal injury
or damage to property is borne by the equipment operator or user.

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3.5 Standards, Directives and CE Mark

The equipment complies with currently applicable DIN and VDE
regulations. The requirements of BGVA3 are met on the basis of
compliance with EN 50274/VDE 0660-51.

The requirements of VDE 0100, Part 410, IEC 60364-4-41, "Func­tional extra-low voltage with safe isolation" and IEC 62109, "Safety
of power converters for use in photovoltaic power systems" have
been complied with where applicable.

The CE mark on the unit confirms compliance with the EC frame­work directives for 2006/95/EC (Low Voltage) and for 2004/108/EC
(Electromagnetic Compatibility), provided that the actions outlined
in the instructions are observed.

3.6 Nameplate

The following information appears on the nameplate:

Figure 4 Rating plate (example)

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3.7 Technology

Protect PV.500_MH Operating Instructions

Due to the utilisation of high-performance electronic components,
the equipment boasts a very high degree of operational reliability,
is extremely efficient and is characterised by its versatility in com­municating with other systems by means of interfaces.

The entire control electronics system for the equipment is based
on the use of microcomputer assemblies. The fact that the various
assemblies are logically integrated and linked into the overall sys­tem means that unit properties can be defined by making unit­specific parameter settings in the software.

Information is exchanged between the individual modules using
the CAN bus (Controller Area Network). This CAN bus features
high interference immunity and is used in a wide variety of indus­trial applications.

The figure below illustrates the principle of the equipment.

DC

(PV-Module)

Protect PV.500

Q4

=

K7

Q26

Display

~

~

~

Kommunikation

M

Steuergerät-

Steuergerät

versorgung

Mittelspannungs-Netz

Figure 5 Functional principle of the equipment for connection to a low-

voltage mains

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The main assemblies of the inverter are:

 DC load interrupter switch Q4
 Inverter stack, display and control unit with communication

components

 AC filter
 Inverter output contactor K7
 Mains transformer (external)
 Mains disconnector Q26

The PV cells supply the inverter stack with DC voltage via DC load
interrupter switch Q4. The inverter stack converts this DC voltage
into a 3-phase AC voltage. A sinusoidal current is fed into the
mains via the AC filter, inverter output contactor K7 and the mains
transformer.

DANGER

Risk to life due to electric shock.

Mains disconnector Q26 and the isolator in the generator connec­tion box (GCB) are there to isolate the inverter in the event of unit
faults or when maintenance needs to be performed on the unit.

The control unit is supplied with power from the AC mains or, op­tionally, from a second AC mains.

3.8 Operating Elements

For details of how the internal operating elements are arranged,
please refer to the documents included in the unit.

Potentially fatal voltages are present at the terminals on

the equipment.

 Do not touch live parts.

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4 System Description

This chapter describes the individual operation operating mode
and functions of the equipment.

4.1 Individual Operation

In individual operation, the inverter works independently and is not
connected to any other inverters. The DC infeed from the PV cells
and the link to the AC mains are only connected to this inverter.
Switching operations, control commands and modifications to set­ting parameters are only performed by the unit concerned.

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5 System Function

5.1 Description of Sequence Control

As soon as the equipment's control module is supplied with volt­age, sequence control starts.

Initially, load interrupter switch Q4 remains open. Once the initiali­sation phase is complete and if no deactivating faults are pending,
load interrupter switch Q4 is closed. During subsequent operation,
the switch is only opened by deactivating faults ( Chapter 6).

Inverter output contactor K7 remains open initially. The contactor is
switched by the sequence control.

The figure below provides a graphical illustration of the sequence
control statuses.

5.1.1 The "OFF" Status

OFF command OFF command

Feed-in

conditions met

Delay
complete

ON command

Waiting for feed

Fault

Operation

Fault

Operating
conditions
no longer
met

Waiting

Fault

Figure 6 Sequence control

OFF

conditions

Fault

OFF command

OFF command

Daytime detection

Night-time detection

Fault
acknowledgement

Fault

Night

The equipment has been switched off logically via the DOU or the
master control unit.

The equipment is running without faults, the monitoring systems
are not activated.

In this status, no power is fed into the mains.
Possible change of status:

The status can be switched from "OFF" to "Waiting for feed condi­tions" by switching the equipment on via the DOU and the master
control unit.

5.1.2 The "Waiting for Feed Conditions" Status

The values of the DC voltage on the PV cells, the mains voltage
and the mains frequency are monitored by the equipment.

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The set monitoring values are regularly checked.
In this status, no power is fed into the mains.

Possible change of status:

If the DC voltage rises above a certain value for a certain time and
the mains voltage and mains frequency are within a certain range,
the unit switches to the "Operation" status. A start-up attempt is
made, which involves switching on the inverter stack. If the DC
voltage collapses too dramatically during this start-up attempt, the
inverter stack is switched off again and there is a delay before at­tempting to start up again. The equipment will not switch to the
"Operation" status until any dip in the DC voltage that occurs dur­ing a start-up attempt is within acceptable limits.

If the DC voltage falls below a certain value for a certain time, the
equipment switches to the "Night" status.
If a deactivating or self-acknowledging fault is triggered, the
equipment switches to the "Fault" status.
The status can be switched from "Waiting for feed conditions" to
"OFF" using the "Off" control command.

5.1.3 The "Operation" Status

The equipment has met all conditions for operation and no deac­tivating or self-acknowledging faults are present.

The set monitoring values are regularly checked.
In this status, power is fed into the mains and inverter output con-

tactor K7 is closed.

Possible change of status:

If the generated power falls below a certain value for a certain
time, the operating conditions are no longer met. The equipment
then switches to the "Waiting" status.

If a deactivating or self-acknowledging fault is triggered, the
equipment switches to the "Fault" status.

The status can be switched from "Operation" to "OFF" using the
"Off" control command.

5.1.4 The "Waiting" Status

If the power fed in falls below a certain value when the equipment
is in "Operation", it switches to the "Waiting" status. Although the
incoming power is low, the DC voltage of the PV cell could still be
high enough and even stable enough to meet the feed conditions
in the "Waiting for feed conditions" status. So that the inverter does
not switch back on again immediately, thereby subjecting inverter
output contactor K7 to unnecessary strain due to frequent switch­ing, after the "Operation" status the unit initially switches to the
"Waiting" status. It remains in this status for a certain time, only
switching to the "Waiting for feed conditions" status once this time
has elapsed.

The set monitoring values are regularly checked.

Possible change of status:

Once the delay has elapsed, the unit switches to the "Waiting for
feed conditions" status.

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If a deactivating or self-acknowledging fault is triggered, the
equipment switches to the "Fault" status.

The status can be switched from "Operation" to "OFF" using the
"Off" control command.

5.1.5 The "Fault" Status

If a deactivating or self-acknowledging fault is triggered ( Chap­ter 6), the equipment switches to the "Fault" status.

The set monitoring values are regularly checked.
In this status, no power is fed into the mains.

Possible change of status:

If a self-acknowledging fault has been triggered and this fault does
indeed acknowledge itself, the unit switches to the "Waiting for
feed conditions" status.

If a deactivating fault has been triggered, the "Acknowledge fault"
control command can be used to switch back to the "Waiting" sta­tus.
The status can be switched from "Fault" to "OFF" using the "Off"
control command. In the "OFF" status, the unit is always free of
faults.

5.1.6 The "Night" Status

If the DC voltage falls below a certain value for a certain time, the
equipment switches to the "Night" status.

The set monitoring values are regularly checked.
In this status, no power is fed into the mains.

Possible change of status:

If, the following morning, the DC voltage rises above a certain val­ue for a certain time, the equipment switches to the "Waiting for
feed conditions" status.

If a deactivating or self-acknowledging fault is triggered, the
equipment switches to the "Fault" status.

The status can be switched from "Operation" to "OFF" using the
"Off" control command.

5.1.7 Sequence Control During the Course of the Day

Early morning:

The equipment is in the "Night" status. The sun's rays increase the
DC voltage generated by the PV cells. If this voltage stays above a
certain value for a certain time, the unit switches to the "Waiting for
feed conditions" status.

The DC voltage continues to be monitored in this status. In order
for a start-up attempt to be made, it must remain above a certain
value for a certain time. The mains voltage and mains frequency
are also checked. These values must be within certain limits.

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If the DC voltage continues to increase due to the sun's rays get­ting stronger and the mains voltage and mains frequency are with­in acceptable limits, a start-up attempt is made. During a start-up
attempt, the inverter stack is switched on, thereby drawing power
from the DC voltage that is present. Inverter output contactor K7 is
open during a start-up attempt. If the load on the DC voltage caus­es it to collapse too dramatically during this start-up attempt, the
inverter stack is switched off again and there is a delay until the
next start-up attempt is made. If the DC voltage does not dip too
significantly, inverter output contactor K7 closes and power is fed
into the mains. The inverter is now in the "Operation" status.

Day:

During the course of the day, the inverter will remain in the "Opera­tion" status if the sun's rays are strong enough and no faults occur.
Power is fed into the mains and inverter output contactor K7 is
closed.

Evening:

As the sun goes down, the power fed into the mains decreases. If
this power falls below a certain value for a certain time, the operat­ing conditions are no longer met. The inverter stack is switched off,
inverter output contactor K7 opens and the unit switches to the
"Waiting" status.

Once the "Waiting" status delay has elapsed, the unit switches
back to "Waiting for feed conditions". Although the sun's rays are
not as strong, the DC voltage might still be high enough for a suc­cessful start-up attempt with the inverter stack and inverter output
contactor K7 being switched on again. However, because the
sun's rays are not as strong, it is unlikely that the operating condi­tions will still be met in the "Operation" status. As a result, the
equipment will switch back to the "Waiting" status once a delay
has elapsed.

When the unit switches back to this status, the delay is extended
until the unit switches back to the "Waiting for feed conditions" sta­tus.

The cyclic changes of status "Operation" -> "Waiting" -> "Waiting
for feed conditions" -> "Operation" can take place several times
depending on insolation, the time of year, location and other condi­tions (e.g. snow on the PV cells). So that inverter output contactor
K7 is not overloaded by this cycle of changes, the "Waiting" status
delay is extended every time the unit switches to this status.

This has very little effect on the energy fed in, because the low
levels of insolation mean that hardly any energy is being generat­ed.

Later in the evening:

Levels of insolation continue to fall. As a result, the DC voltage
drops again. If the DC voltage drops below a certain value for a
certain time, no more start-up attempts are made. If the DC volt­age continues to drop, the unit switches to the "Night" status.

Night:

The equipment shuts down all possible loads so that as little ener­gy as possible is being consumed. The equipment remains in the
"Night" status until the following morning.

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5.1.8 Sequence Control Parameters

Switch-on conditions
Underfrequency, overfrequency, undervoltage, overvoltage:

The equipment will only switch from the "Waiting for feed condi­tions" status to the "Operation" status if the feed conditions are
met. These conditions include the mains voltage and the mains
frequency. These values must be within certain limits described by
the switch-on conditions.

Voltage limit value for night detection,
delay time for night detection:

If the DC voltage falls below the voltage limit value for longer than
the delay time, the unit switches to the "Night" status.

Voltage limit value for day detection,
delay time for day detection:

If the DC voltage rises above the voltage limit value for longer than
the delay time, the equipment switches to the "Waiting for feed
conditions" status.

Inverter stack switch-on time:

The time for which the inverter stack is switched on during a start­up attempt

Permissible voltage dip after switching on the stack:

Prior to the start-up attempt, a limit value is calculated from the
present DC voltage and the permissible voltage dip.

If the start-up attempt causes the DC voltage to fall below this cal­culated limit value, this start-up attempt will fail.

Delay until the next start-up attempt following failure on ac­count of excess voltage dip:

After the failure of a start-up attempt, this delay must elapse before
the next start-up attempt is made.

Power limit value for shutdown,
delay time for shutdown:

If the power fed into the mains remains below the limit value for
longer than the delay time, the unit switches to the "Waiting" sta­tus.

Standard delay for a renewed start-up attempt following shut­down,
offset delay added to the standard delay after shutdown,
maximum number of times the offset delay can be added to
the standard delay:

Variable delay in the "Waiting" status  Chapter 5.1.4.

Minimum DC voltage,
fill factor (PV system parameter):

If the DC voltage rises above a value resulting from the minimum
DC voltage divided by the fill factor, a start-up attempt is made.

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5.2 Description of Fan Control

5.2.1 General

The equipment features temperature-dependent fan control. The
fans are either switched off, run on a fast or slow fan stage (cabi­net fan only) or are gradually speeded up or slowed down (stack
fan only).

Fan control:

 Extends the operating time of the fans
 Minimises the noise generated by the fans
 Improves the efficiency of the equipment by reducing its power

consumption

5.2.2 Fan Control, Cabinet Fan

As soon as the equipment's control module is supplied with volt­age, fan control always starts with the fast fan stage. The control
can be restarted to check whether the fans are working correctly.
For example, after maintenance work, it is not necessary to wait
for the fans to reach the temperature criterion to switch on the fast
fan stage.

The fast fan stage is always active for at least a certain time. The
unit exhaust air temperatures are checked after this time. If the
highest temperature from the two sensors is below a certain value,
the fan control switches to the slow fan stage.

The unit exhaust air temperatures are also checked in the slow fan
stage. If the highest temperature from the two sensors is below a
certain value, the fans are switched off. If the highest temperature
rises again during operation with the lower fan stage, fan control
switches to the fast fan stage.

If, when the fans are switched off, the highest temperature from
the two sensors rises above a certain value, fan control switches to
the fast fan stage.

Initialisation

Fast fan stage,
minimum time!

Unit exhaust air

temperature > limit

value

Unit exhaust

air temperature

> limit value

Figure 7 Fan control

Slow fan stage

Fan switched off

Unit exhaust air
temperature < limit
value

Unit exhaust air
temperature < limit
value

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5.2.3 Cabinet Fan Control Parameters

Unit exhaust air temperature limit value for switching on the
fan:

If the highest exhaust air temperature rises above this limit value,
the fans which were switched off are switched to the fast fan stage.

Unit exhaust air temperature limit value for switching off the
fan:

If the highest exhaust air temperature falls below this limit value,
the fans which were running in the slow fan stage are switched off.

Unit exhaust air temperature limit value for switching to the
fast fan stage:

If the highest exhaust air temperature rises above this limit value,
the fans which were running in the slow fan stage are switched to
the fast fan stage.

Unit exhaust air temperature limit value for switching to the
slow fan stage,
minimum time in the fast fan stage:

If the highest exhaust air temperature falls below this limit value,
the fans which were running in the fast fan stage are switched to
the slow fan stage if the minimum time in the fast fan stage has
elapsed.

5.2.4 Fan Control, Inverter Stack Fan

As soon as the equipment's control module is supplied with volt­age, fan control always starts with the maximum fan speed. This
means that the control can be restarted to check whether the fan is
working correctly. For example, after maintenance work, it is not
necessary to wait for the fan to reach the temperature criterion to
switch on the maximum fan speed.

The maximum fan speed is always active for at least a certain
time. The IGBT temperatures are checked after this time. The fan
speed is then determined using the highest of these temperatures.
If the highest temperature from the two sensors is below a certain
value, the fan is switched off completely.

If, when the fans are switched off, the highest temperature from
the two sensors rises above a certain value, the fan is again oper­ated at the maximum speed for a certain time.

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Initialisation

Maximum speed,

minimum time!

Minimum time elapsed

IGBT temperature

> limit value

Figure 8 Fan control

Variable speed

depending on IGBT

temperature

Fan switched off

5.2.5 Parameters of Inverter Stack Fan Control

IGBT temperature limit value for switching off the fan:

If the highest IGBT temperature falls below this limit value, the fan
is switched off.

IGBT temperature limits and fan speeds, x-y coordinates for
determining variable speed:

The variable fan speed is determined by a linear x-y characteristic
on the basis of these values.

IGBT temperature limit:
If the IGBT temperature rises above the lower limit value, the fan
that was previously switched off is run at maximum speed for the
minimum time.

Minimum time, maximum speed:
If the minimum time has elapsed, the fan is controlled variably us­ing the measured IGBT temperature.

IGBT temperature
< limit value

5.3 Insulation Monitoring and Earthing of PV Cells

5.3.1 General

Insulation measurements and tests are carried out with an inte­grated isometer. This unit detects and checks the insulation re­sistance.

The insulation resistance detected is compared with two limit val­ues stored in the isometer. If the insulation resistance is below one
of the limit values, the unit generates a signal. If the limit value is
below the other limit value, the device generates a second signal.
The limit values can be displayed and even modified on the isome­ter.

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The insulation resistance detected and the two signals are sent to
the equipment control. The insulation resistance is displayed as a
measured value. Signalling faults are generated from the two
isometer signals ( Chapter 6).

Sequence control behaviour differs depending on which solar cells
are connected. The solar cells do not need to be earthed for op­eration with monocrystalline or polycrystalline solar cells. In this
case, insulation measurement is always active.

For operation with thin-film solar cells, the solar cells must be
earthed. In this case, insulation measurement is not active during
earthing.

Insulation measurement sequence control features a "Mainte­nance mode". This mode can only be activated for thin-film solar
cells. Activating this mode disconnects earthing. This can be useful
when mowing areas where solar panels are installed, for example.

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5.3.2 Operation With Monocrystalline or Polycrystalline Solar Cells

General:

This type of solar cell does not require active earthing.

Sequence control:

Insulation monitoring is always active.

Maintenance mode:

No action in the event of a "Maintenance mode" command.

Starting the insulation test manually:

No action, since the insulation test is always active.

5.3.3 Operation with Thin-Film Solar Cells

General:

This type of solar cell requires active earthing.
Active earthing is switched on during the day and switches off at

night. An insulation test is carried out at night.
When active earthing is switched on, the digital signals and ana-

logue signal from the isometer are ignored.
Once active earthing is switched off, a certain time is allowed to

elapse before the digital signals from the isometer are evaluated
and the analogue measured value is output.

Sequence control:

When the equipment sequence control switches to the "Night" sta­tus (see Chapter 5.1.6), active earthing is switched off once a cer­tain time has elapsed.

The insulation test starts with a delay. Once a certain test time has
elapsed, the insulation test finishes and active earthing is switched
on again. If the sequence control switches to "Operation" status
before the test time has elapsed, the timer control is ignored, the
insulation test is terminated and active earthing is switched back
on.

Maintenance mode:

Maintenance mode can be triggered either via a command or by
means of remote signalling. Active earthing switches off immedi­ately when maintenance mode is activated. However, the digital
and analogue signals from the isometer continue to be ignored.
Active earthing is switched on again the next time a switch is made
to "Operation" status. However, the unit remains in maintenance
mode for at least a certain time; i.e. even if the unit is switched
over to the "Operation" status, maintenance mode is not terminat­ed until this time has elapsed.

Starting the insulation test manually:

The insulation test can be started manually for maintenance work.
Active earthing is switched off when the insulation test is started

and the test actually commences once a delay has elapsed. When
the test time has elapsed, the insulation test ends and active earth­ing is switched on again.

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The insulation test can only be started manually if an insulation
test is not already running at the time.

5.3.4 Insulation Monitoring Parameters

All parameters are only relevant for operation with thin-film solar
cells.

Insulation test time:

The analogue and digital signals from the isometer are evaluated
during this time.

Delay for insulation test following shutdown of K21 (earthing
of PV cells):

Once the earthing has been disconnected, this time must elapse
before insulation measurement can start.

Delay for shutdown of K21 in night operation:

Once sequence control has switched to the "Night" status, this
time must elapse before earthing is removed with contactor K21.

5.4 MPP Tracker

Minimum time in maintenance mode:

If maintenance mode has been activated, the earthing is discon­nected and remains so for at least this time.

In the "Operation" status (see Chapter 5.1.3), the inverter detects
the maximum power point (MPP) of the PV cells.

The MPP tracker detects the point at which the solar cells give off
maximum power.

This enables the system to achieve optimum efficiency.

Figure 9 MPP performance curve

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6 Monitoring Systems, Messages and Faults

6.1 General Information

All monitoring systems only generate fault messages when the in­verter is switched on; when it is switched off, the inverter is always
reported as being free of faults.

A distinction is made between deactivating, self-acknowledging
and signalling faults.

Deactivating faults switch the equipment off permanently once
they have occurred a number of times. K7 and Q4 are opened.

When a fault first occurs, it is acknowledged after a certain time
has elapsed and the inverter makes a start-up attempt. This start­up attempt is only made if the DC voltage did not drop too dramati­cally during the fault. If the cause of the fault is still present after
the start-up attempt, the inverter is switched off again.

A maximum of 3 start-up attempts are made.
Each time the inverter is switched off, K7 and Q4 are opened.
After a successful start-up attempt and once a certain operating

time has elapsed, the counter for start-up attempts is reset again.
If the third start-up attempt is also unsuccessful, the inverter is

switched off permanently. The fault is then no longer self­acknowledging. It can be acknowledged by switching the equip­ment off and on or by manually acknowledging the fault. However,
if the cause of the fault is still present following manual acknowl­edgement, another deactivating fault will be generated.

Self-acknowledging faults switch the equipment off. K7 is
opened, Q4 remains closed.

The equipment starts up again when the cause of the fault is no
longer present. The fault can also be acknowledged manually or
by switching the equipment off and on. However, if the cause of
the fault is still present following manual acknowledgement, anoth­er self-acknowledging fault will be generated.

Signalling faults do not have any effect on the equipment's se­quence control. K7 and Q4 remain closed.

A signalling fault acknowledges itself automatically when the cause
of the fault is no longer present. The fault can also be acknowl­edged manually or by switching the equipment off and on. Howev­er, if the cause of the fault is still present following manual
acknowledgement, another signalling fault will be generated.

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6.2 Table of Faults

The monitoring systems listed below will cause the inverter to switch off, are self­acknowledging or signalling and are shown on the DOU with corresponding plain text:

Temperature monitoring systems

Fault/Message

Deac-

tivating

IGBT 1 stack temperature warning X !Equipment temperature fault!

IGBT 2 stack temperature warning X !Equipment temperature fault!

IGBT 1 stack temperature fault X #Equipment temperature fault#

IGBT 2 stack temperature fault X #Equipment temperature fault#

IGBT supply air undertemperature X !Ambient temperature fault!

IGBT supply air temperature warning X !Ambient temperature fault!

IGBT supply air temperature fault X #Ambient temperature fault#

acknow-led

Self-

ging

Signalling

DOU message

Unit exhaust air 1

X !Equipment temperature fault!

temperature warning

Unit exhaust air 2

X !Equipment temperature fault!

temperature warning

Unit exhaust air 1

X #Equipment temperature fault#

temperature fault

Unit exhaust air 2

X #Equipment temperature fault#

temperature fault

Equipment supply air undertempera-

X !Ambient temperature fault!

ture

Unit supply air temperature warning X !Ambient temperature fault!

Unit supply air temperature fault X #Ambient temperature fault#

Temperature sensor fault

X #Temperature sensor fault#

IGBT 1 stack

Temperature sensor fault

X #Temperature sensor fault#

IGBT 2 stack

Temperature sensor fault

X #Temperature sensor fault#

IGBT supply air temperature

Temperature sensor fault

X #Temperature sensor fault#

unit exhaust air 1 temperature

Temperature sensor fault

X #Temperature sensor fault#

unit exhaust air 2 temperature

Temperature sensor fault unit supply

X #Temperature sensor fault#

air temperature

IGBT difference temperature
deviation

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X #IGBT difference temperature

dev.#

CAN I/O monitoring systems

Fault/Message

Protect PV.500_MH Operating Instructions

Deac-

tivat-ing

Self-

acknow-led

ging

Signalling

DOU message

Feedback signal
DC load interrupter switch Q4.1

Switch position Q4.1

Feedback signal
K21 earthing PV cells

Monitoring
F21 earthing circuit breaker

Monitoring
F81 surge voltage arrester DC
input

Monitoring
insulation monitor level 1

Monitoring
insulation monitor level 2

Monitoring mains voltage
auxiliary power supply mains 2

Monitoring
F83/F84 surge voltage arrester AC
– anti-condensation heater

X Q4.x: !Switch feedback fault!

X Q4.x: Switch open

X K21: !Switch feedback fault!

X !Miniature circuit breaker tripped!

X !Overvoltage protection tripped!

X !Insulation monitor warning!

X !Insulation monitor alarm!

X !Auxiliary power supply – mains

failed!

X F83/84: !Miniature circuit breaker

tripped!

Monitoring
F60 auxiliary power supply mains 2

Monitoring
F61 independent power supply
mains 1

Monitoring
Q26 AC mains disconnector

Monitoring
unit cabinet door

Monitoring communication CAN
I/O AC cabinet

Monitoring communication CAN
I/O DC cabinet

Monitoring
CAN I/O parameters

X F60: !Miniature circuit breaker

tripped!

X F61: !Miniature circuit breaker

tripped!

X Q26: Switch open

X !Unit cabinet door open!

X !Communication fault with I/O

control!

X !Communication fault with I/O

control!

X #I/O parameter error#

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Unit Monitoring Systems

Fault/Message

Protect PV.500-MH Operating Instructions

Deac-

tivat-ing

Self-

acknow-led

ging

Signalling

DOU message

Monitoring
fan fault cabinet fan

Monitoring
fan fault stack fans

Monitoring K91
feedback signal fan contactor

Monitoring K7
feedback signal INV

output contactor

Monitoring
parameter limits

Monitoring
PCB ID

Monitoring
EEPROM

Monitoring
serial EEPROM

Monitoring
Watchdog

X !Fan failure!

X !Fan failure!

X K91: !Switch feedback fault!

X #Fault K7 feedback signal#

X !Parameter limit fault!

X #Self-test fault#

X #EEPROM fault#

X !System fault!

X #Watchdog#

Monitoring
15 V supply voltage

Monitoring
IGBT stack

Monitoring
short-circuit/overload

Monitoring
load current transformer

Monitoring
stack current transformer

Monitoring

inverter output voltage

Monitoring
stack overcurrent

Monitoring
mains synchronisation

Monitoring
parallel CAN communication

X #15 V supply voltage fault#

X #Stack fault#

X #Short circuit#

X #Load current transformer fault#

X #Stack current transformer –

fault#

X #AC voltage deviation#

X #Stack overcurrent#

X #Synchronisation fault#

X !Communication fault parallel

CAN!

Monitoring

X !Remote monitoring fault!

remote monitoring communication

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DC voltage monitoring systems

Fault/Message

Deac-

tivat-ing

acknow-led

Self-

ging

Signalling

DOU message

Monitoring

X #DC voltage deviation#

DC overvoltage

Grid monitoring systems

Fault/Message

Deac-

tivat-ing

Self-

acknow-led

ging

Signalling

DOU message

Field rotation or phase fault X #Field rotation fault#

Monitoring

X #Mains frequency deviation#

grid overfrequency

Monitoring

X #Mains frequency deviation#

grid underfrequency

Monitoring

X #Mains voltage deviation#

grid overvoltage

Monitoring

X #Mains voltage deviation#

grid undervoltage

Monitoring

X #Mains symmetry fault#

symmetric fault

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7 Interfaces

PV power stations are usually monitored from a central location.
Alongside the PV cells, the inverter is a key component of a power
station, which is why various communication interfaces are availa­ble as standard.

These include relay contacts and optocouplers, as well as various
serial interfaces with protocols for integration into higher-level
monitoring systems.

To facilitate PV power station monitoring, AEG also offers relevant
additional components that are adapted for use with inverters and
PV generators. This enables the client to monitor an entire PV
power station from a central location easily and reliably.

7.1 Communication Interface

The photovoltaic inverter is equipped with a central communication
unit, a "MultiCom CCC interface".

As well as performing various other functions, this unit facilitates
communication between PV inverters and higher-level monitoring
systems.

A special system of central monitoring via the Internet can be real­ised using AEG monitoring components such as "PV.LoG". The
connection between the inverter and PV-LoG has been optimally
adapted for monitoring and management purposes and is estab­lished via the Modbus protocol. If you have any further questions,
please contact your supplier.

7.1.1 General

Two separate potential-free serial interfaces are provided as
standard for the purpose of establishing communication connec­tions. One interface – port X2 – is assigned the AEG-specific pro­tocol CBSER and is used both locally and remotely for correspond­ing service tools. The other one – port X5 – supports the Modbus
protocol and enables the PV inverter to be integrated into higher­level monitoring and control systems with ease. This port can be
switched over from RS232 to RS485.

An external CAN bus provides a further connection option, which
can be used for monitoring via a remote panel.

The MultiCom CCC interface can be found on the pivot inside the
DC/AC cabinet (item A29.1; see the assembly diagram).

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MultiCom CCC hardware data (assembly A29.1)

Connector : Port 1 RS232 for configuration
and COM server connection

X2: 9-pin D-sub (socket; insulated)
Port 2 RS232/RS485 for Modbus
X5: 9-pin D-sub (socket; insulated)
RS485 connection: Twisted pair with Data+, Data-,
shielded, shield attached on one side
Distance: 1200 m max. at 9600 baud
Bus stations: Max. 32
Data line: Shielded 1:1 data line

(2 x 0.22; twisted pair),
e.g. Lapp "UNITRONIC-BUS LD"

Port 3 CAN bus for remote panel
X4: 3-pin Combicon connector

Communication data port 1 (X2)

Protocol: CBSER
Transmission rate: 1200 - 57,600 baud (adjustable)

Transmission parameters: 9600 baud, 8, E, 1 (default)
Configuration mode: 9600 baud, 8, N, 1

Communication data port 2 (X5)

Protocol: Modbus
Transmission mode: Half-duplex
Transmission code: RTU
Transmission rate: 1200 - 57,600 baud (variable)
19,200 baud (default)
Start bits: 1
Data bits: 8
Parity: none, even, odd (variable)
Stop bits: 2 with no parity, 1 with parity
Function code: 03 (read register)

06 (write register)
16 (write multiple registers)

Min. response time of slave: 0-99 ms variable (0 ms default)
Modbus slave address: 01-99 (adjustable) (01 default)

Communication data port 3 (X4)

Protocol: Proprietary CAN bus
Transmission rate: 50 kbaud

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7.1.3 Structure of the MultiCom CCC Interface

RS232:RS485:

1

J4

1

J5

X5

1

J1

1

X1

1

rt

LED

gn

X3

1

B A B A

X4

S1

1

1

X2

Modbus Configuration

Figure 13 MultiCom CCC interface as a Modbus interface (top view)

Connections:
X1: Internal inverter bus and power supply

X2: Potential-free RS232 serial interface

X3: Triggering of "Remote signalling"

X4: A remote panel can be connected to this potential-free CAN

interface.

X5: Potential-free RS485/RS232 serial interface internally wired

to X91

Configuration jumpers:
J1: 1-2: Firmware update; 2-3: (default)
J4: All closed: RS485 (default)
J5: All closed: RS232

The transmission topology of the Modbus interface (connector X5)
is set by means of the two configuration jumper blocks (J4/J5). The
factory setting is RS485.

In order to be able to use the Modbus interface as a point-to-point
connection via RS232, you must remove all jumpers from block J4
and plug them in on block J5.

Button:
S1: Button for initiating the configuration via connector X2

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LED signals:
Green/red flashes: Configuration can be selected via the ter-

minal
(up to 30 seconds after restarting)

Green on: Operating status; no external communica-

tion via X2 and X5

Green flashes: Data transmission on the serial interfaces

(X2 or X5)

Red on: Fault

Description of serial interfaces:

Port 1: Serial interface X2

The potential-free RS232 serial interface at connector X2 supports
the AEG-specific CBSER protocol for parameter setting and moni­toring purposes. Special service tools can be used to monitor and
manage the equipment locally and (with the aid of the COM serv­er) remotely via a network. This is also the port used for configur­ing the assembly's interfaces.

5

9

Figure 14 Serial D-sub connector X2

Port 1 (X2): RS232 pin assignment

Pin number Signal Description

2 RxD PC receiving data from the MCC
3 TxD PC sending data to the MCC
5 GND Interface reference potential

Housing INV housing potential

Please use a 1:1 data cable for configuration purposes.

Port 2: Serial interface X5 (internally wired to X91)

The potential-free RS485 interface at connector X5 supports the
Modbus protocol for integration into higher-level monitoring sys­tems.

1

6

5

9

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Figure 15 Serial D-sub connector X5

Port 2 (X5): RS485 pin assignment (default)

Pin number Signal Description

3 B High data
8 A Low data

Housing INV housing potential

Please use a shielded fieldbus cable as the line,
e.g. 2 x 0.22 twisted pair Lapp "UNITRONIC-BUS LD".

Please connect the RS485 bus line via the bus interface connector
supplied. In an RS485 network, the ends of the bus must always
be terminated. If necessary, insert the 120 ohm resistor supplied
between connections A and B.

Shield connection of the RS485 bus line:
Shielding is a means of weakening (attenuating) magnetic, elec-

trical or electromagnetic interference fields.
Interference currents on line shields are dissipated to earth by
means of the shield busbar that has a conductive connection to the
housing. A low-impedance connection to the PE conductor is es­pecially important to prevent these interference currents from
themselves becoming a source of interference.

If possible, only use lines with a braided shield. The shield cover­age should be at least 80%. Avoid using lines with a foil shield be­cause tensile and compressive stresses applied when fastening
the line can easily damage the foil, resulting in a reduction in the
shielding effect.

Please bear the following points in mind when handling the screen:
 Use cable clips or shield terminal blocks made of metal to se-

cure the braided shield. The clips must surround the shield and
make good contact with it over a large area.

 Attach the shield to a shield busbar right after the line enters

the cabinet. Run the shield right up to the assembly; however,
ensure that it does not make contact there!

When used in PV applications, the shield of the RS485 bus line
should only be earthed on one side so that no equalising or inter­ference currents can flow through the shielding. However, if sever­al bus stations are present, you must make sure that the shield is
never interrupted.

Always attach the shield of the RS485 bus line to earth on the qui­escent side, i.e. only one side of the shield is attached to the earth
potential on the master or data logger side.

In the PV inverter, the shield must not be connected to the housing
in any way.

Insert the RS485 bus cable into the equipment until it reaches the
MultiCom interface, shorten it accordingly and attach both wires to
terminals A and B.

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The X5 interface can be switched from RS485 to RS232 using
jumpers J4 and J5. The factory setting is RS485, i.e. all jumpers
are inserted at J4. You have the option of switching the interface to
RS232 by reconnecting all jumpers to J5.

Port 2 (X5): RS232 pin assignment

Pin number Signal Description

2 RxD PC receiving data
3 TxD PC sending data
5 GND Interface reference potential
7 RTS Handshake
8 CTS Handshake

Housing INV housing potential

If the RS232 version is used for this port, please use a 1:1 data
line.

Controller Area Network (CAN) at X4

Up to four remote panels can also be connected to the potential­free CAN interface for central signalling and display.

1

Figure 16 Connector X4

Port 3 (X4): CAN pin assignment

Pin number Designation Cable colour coding

1 GND White + brown
2 Data_L Yellow
3 Data_H Green

Please use a shielded CAN bus cable as the line,
e.g. 2 x 0.22 twisted pair Lapp "UNITRONIC-BUS LD".

Route the CAN bus line from the PV inverter to the remote panel.
In a CAN bus network, the ends of the bus must always be termi­nated. A 120 ohm terminating resistor is pre-installed at connector
X4 of the CAN bus connection as standard.

7.1.4 Configuration

The communication interface does not have to be configured in or­der to connect the PV inverter to the data logger system of the
AEG "PV.LoG". Once the bus cable has been installed and the
system has been powered up, the configuration settings are made
fully automatically.

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If you are using a different/in-house monitoring system, you can
adjust the transmission parameters and the slave address of the
Modbus interface to suit your requirements via port 1 (X2). We
would be happy to provide you with the Modbus unit profile on re­quest.

7.1.4.1 Configuration Preparations

You will need a 1:1 data line and a PC.
For this configuration, you must connect the PC to the MultiCom

interface (X2) via the data line and start a terminal program, e.g.
Hyperterminal, on the PC.

Setting the terminal program:

Data transmission: COMx, 9600 baud/8 data bits/1 stop bit
No parity/no protocol
Terminal emulation: VT100
You can then start the configuration by pressing the “S1” button on

the MultiCom interface. Ensure that no communication has taken
place via interfaces X2/X5 for at least 10 seconds before doing so.

Initiation of the configuration is displayed by the two LEDs flashing
on the MultiCom interface and the following display on the termi­nal:

“PRESS <CR> FOR CONFIGURATION WHILE LED IS
FLASHING”

The configuration starts provided you press the <ENTER> key
(<CR>) within 30 seconds. The configuration main menu opens:

Figure 18 Main menu

If the configuration does not start, you must wait for 10 seconds
and then repeat the procedure. Make sure that no data is received
via the X2/X5 interfaces during this time.

Press the following key in the main menu:
<CR> to save the set values, exit the configuration and activate

the MultiCom interface.
<ESC> to cancel the configuration.
<2> to access the X5 data transmission configuration.
<4> to access the X5 data protocol configuration.

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The possible keyboard actions are shown in the menu in “< >”.

The following special keys can be used in the menus:
<CR>: Carriage return () or ENTER key
<ESC>: Escape key
<TAB>: Tabulator () key
<BS>: Backspace () or Rubout key
< >: Space bar

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7.1.4.2 Configuring the Modbus Protocol

To access the X5 data protocol configuration, you must press <4>
in the main menu:

Figure 19 Data protocol configuration

Press one of the following keys in the “X5 Data Protocol” menu:
<TAB> to configure the Modbus protocol
<CR> to accept the set values. The configuration is finished and

the main menu is opened again.
<ESC> to cancel the configuration. This opens the main menu.

Figure 20 Modbus protocol configuration

Press one of the following keys in the “X5 Data Protocol – Mod­bus/JBusV2” menu:

 <!> to load the factory setting.
 <1> to configure the Modbus slave address.
 <2> to configure the delay time between a request from the

master and the response from the slave.

 <CR> to accept the set values. The configuration is finished

and the main menu is opened again.

 <ESC> to cancel the configuration. This opens the main menu.

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7.1.4.3 Configuring Modbus Data Transmission

To access the X5 data transmission configuration, you must press
<2> in the main menu:

Figure 21 Modbus/JBus data transmission configuration

Press one of the following keys in the “X5 Data Transmission”
menu:

 <1-7> to set the baud rate.
 <n,e,o> to set the parity.
 <8,9> to set the number of stop bits.
 <CR> to accept the set values. The configuration is finished

and the main menu is opened again.
 <ESC> to cancel the configuration. This opens the main menu.
The Modbus factory setting is: 19200 8 E 1.

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7.2 COM Server

7.2.1 General

The COM server makes the PV inverter data available via an
Ethernet network. A software application can communicate with
the PV inverter via the network using a virtual COM port (this
needs to be installed on a workstation). The COM server is in­stalled as standard and is used by the AEG service department for
remote maintenance purposes. This calls for an appropriate Ether­net network with an Internet connection plus a fixed IP address as­signment.

The COM server is located at position A27.

7.2.2 Network Connection

This COM server has an IEEE 802.3-compatible network connec­tion on a shielded RJ45 plug connector. Its assignment corre­sponds to that of an MDI interface, which means the connection to
the hub or switch is made using a 1:1 wired patch cable.

Ex-works, the COM server operates in an autonegotiation mode on
the network side. This means the data transmission speed and the
duplex process are automatically negotiated with the connected
switch or hub and are set accordingly.

7.2.3 Structure of the COM Server (internally wired to A93)

H1

gn

MOD1

gn

ye

CN5

1

Digi
Connect ME

1

CN3

CN1

Figure 22 COM server interface (top view)

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Connections:

CN1: Internal inverter bus and power supply
MOD1: Ethernet connection
CN5: Interface for firmware update

Configuration jumpers:

CN3: All closed (default)

LED signals:

Green LED (H1):

The green LED on the assembly indicates the global status of the
assembly. The following signals are possible:

LED Jumper Meaning

Flashing CN3 Start-up/error

On CN3 Ready

Flickering CN3 Ethernet  CAN communication

Green network LED (MOD1):

The green LED indicates communication on the network.

Yellow network LED (MOD1):

The yellow LED remains on permanently if an Ethernet network is
connected.

7.2.4 Installation of the COM Server

The COM server uses a communication module from Digi ("Digi
Connect ME"). In order to communicate via the COM server, it
must be integrated into the network and a virtual COM port must
be set up on a computer. The "Digi Device Discovery" tool and a
Digi RealPort driver are required for this purpose. You can find
these tools at www.digi.com/support or at www.aegps.com.

Network factory settings for the COM server:

IP address: 10.10.10.0
Subnet mask: 255.255.0.0
Default gateway: 0.0.0.0

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7.2.5 Network Integration Configuration

For network integration, you will need a free IP address for the
COM server, the subnet mask plus the IP address for the gateway.
This information can be obtained from your administrator if neces­sary.

 Start the "Digi Device Discovery" tool.
 The tool searches the network for Digi modules. The modules

found are displayed. If several units are found, please select

the unit to be configured using the MAC address. This can be

found on the Digi module sticker on the COM server. If no

modules are detected, check your network and your firewall

settings. Run the search again using "Refresh view".
 Select the required unit. You can enter the necessary network

parameters using the right mouse button + "Configure network

settings".
 Use "Save" and "Reboot" to apply the settings and complete

the installation.

 Exit the "Digi Device Discovery" tool.
 You can use the "ping" command to test whether the COM

server can be reached on the network.

7.2.6 Configuration of the Virtual COM Port

Communication with the COM server takes place via a virtual COM
port, which is implemented by means of a RealPort driver. In order
to do this, the RealPort driver needs to be installed and configured.

 Start the RealPort driver installation process. For this purpose,

the COM server must be connected to the network and the

network parameters must be set.
 The installation program searches the network for Digi mod-

ules. The modules found are displayed along with the config-

ured IP address and MAC address. If several units are found,

please select the unit to be configured using the MAC address

and select "Next". The MAC address can be found on the Digi

module sticker on the COM server. If no modules are detected,

check your network and your firewall settings. Run the search

again using "Refresh view".
 In the "Describe the Device" window, you can make RealPort

settings. This is where you need to select the COM port via

which the application is to communicate later. All other settings

can be left as per the factory settings.
 Select "Finish" to complete the installation.
The application can communicate via the set COMx port with a

baud rate of 115.2 kB as standard. 9600 kB is also possible as an
alternative. Between these two transmission rates, the COM server
has an autobaud detection function.

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7.3 Remote Signalling

The remote signalling board is a contact interface for signalling PV
messages and controlling PV units. It is supplied as an option for
the AEG PV system and is intended for installation in the PV unit.
The remote signalling master board consists of 5 potential-free
signalling contacts and one control input.

There is an independent 24 VDC power supply for the control in­put. The control signal is activated by bridging the relevant input.
There is no need for an additional auxiliary power supply.

The signals are assigned as standard or can be configured on a
customer-specific basis. An integrated service switch enables
maintenance work on the unit to be signalled.

Technical data:

The maximum load for the signalling contacts (X3/X4) is 500 V/8 A
AC or 50 V/2 A DC.

If the specified power has been applied to the relay con­tacts once, those contacts can no longer reliably switch

i

an extra-low voltage (evaporation of the gold alloy)!

The control input (X5) has an independent 24 VDC power supply.
The input is activated via a bridge.

Structure:

2

1

3
2
1

12
11
10

9

8

7
6

5
4

3
2
1

1

1

X7

X1

1

X2

X2

S1

1

1

X6

1

OPT1

K25

K24

K23

K22

K21

X5

X4

X3

1

1

1

Figure 23 Remote signalling master module A12 (top view)

X1: Power supply connection
X2: Connection for remote signalling expansion boards
X3/X4: Remote signalling outputs with relay changeover

switches

X5: Remote signalling input via optocoupler with independ-

ent power supply

X6: Service plug

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X7: Connection to MultiCom interface
S1: Service switch

X3: When a signal is received, the contact between the two

contact points with the lower numbers is closed (normal­ly open or "NO").

X4: When a signal is received, the contact between the two

contact points with the lowest numbers is open (normally
closed or "NC").

X5: The control signal is active when the input is bridged

(normally open). The inverter is switched off.

The following default signals are used for remote signalling:

X3.1-2 3 Inverter feed operation (NO)
X3.4-5 6 DC distribution signal* (NO)
X3.7-8 9 AC distribution signal* (NO)
X3.10-11 12 Incoming mains fault (NO)
X4.1 2-3 Inverter fault* (NC)
X5.1-2 Inverter remote switch-off (NO)

*): Collective signals that contain all messages and faults

Figure 23 shows the normally closed contact in the state that ap­plies when the signal is not active (normally open) or the voltage is
zero.

The service switch enables maintenance work on the unit to be
signalled to the MultiCom interface using various protocols.

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8 Graphical Display and Operation Unit

8.1 General Information

The graphical Display and Operation Unit (DOU) is integrated into
the front of the solar inverter. It serves to signal and visualise unit
data and to control the inverter system. The DOU consists of a
display unit with 3 LEDs, a graphical LCD and an operating panel
with 5 keys.

The global unit status can be read from the LEDs (1). An acoustic
signal generator stresses the urgency of critical system statuses.

The graphical LCD shows equipment statuses and measured val­ues using symbols and plain text. You can control and parametrise
the unit using menus which are protected by a password.

The DOU is operated using 4 display keys, to which alternating
functions are assigned, and one ENTER key. The key functions
that are currently active are shown on the LCD in the form of sym­bols.

Figure 24 DOU

1 LEDs: Red, yellow, green (from top to bottom)
2 Graphical display (LCD)
3 4 general function keys
4 ENTER key

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8.1.1 Signalling

LEDs:

Red, permanently ON: Deactivating fault

Red, flashing: Self-acknowledging deactivating fault
Yellow, flashing: Self-acknowledging message
Green OFF: INV in sleep mode
Green, flashing (1Hz): INV waiting for feed conditions
Green, flashing (0.5 Hz): INV feeding into mains with derating
Green, permanently ON: INV feeding into mains

Acoustic signal generator:

Signal generator ON: Urgent message and equipment fault

8.1.2 Keyboard Operation

You can use the ENTER key to open and close submenus and to
acknowledge control functions and parameters.

The 4 display keys are assigned to different functions. The key
functions that are currently active are represented as symbols
which can be found in a small framed area on the right-hand side
of the LCD.

In the "Operating display" and "Inverter" menus, you can switch
the inverter on and off using the general keys. The keyboard sym­bols in the menu indicate the control function which is currently
available. If a switch-off procedure has been initiated, you must
confirm it by means of a security prompt in order to avoid inadvert­ent switching off. The general control system of the inverter can be
blocked and protected with a password.

If a unit fault occurs, refer to the "Inverter" menu, where the cause
is specified. After eliminating the cause, acknowledge the fault in
the menu. You can then switch the individual converters back on
again.

You can acknowledge the acoustic signal generator using the key­board. On the LCD operating display you will find a special
acknowledgement key represented by a loudspeaker symbol. In all
other menus, you can press any key (even a key to which no func­tions have been assigned) to acknowledge the generator. If the
number of messages or faults increases, the acknowledgement is
cancelled. You can impose a general block that inhibits the acous­tic signal generator in the event of a fault and inhibits the clicking
sound when you press a key.

(must be acknowledged via the menu)

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Possible symbol keys and their function:

Switch off inverter

Switch on inverter

Acknowledge acoustic signal generator

Cursor up/Increase value/Scroll upwards

Cursor down/Decrease value/Scroll downwards

Cursor to the right

Cursor to the left

8.2 Start-up

Status/Measured values menu

System is blocked

Acknowledge fault

Select day/month/year curve

Help menu

No function

Figure 24a Keyboard symbols

Following the power-up reset, the DOU performs a self-test. Data
is read from the inverter once the test has been completed suc­cessfully. The LEDs light up in sequence during this phase. A start
screen appears on the LCD and a status bar indicates the duration
of the start-up process.

When you start up the DOU for the first time (commissioning),
select the menu language using the general keys "<" and ">". The
languages are indicated using the country-specific abbreviation
(number plate). The language that is currently selected is dis­played on a black background. Once you have confirmed the se­lected language by pressing the ENTER key, the next menu
opens. In order to comply with international requirements, all of the
displays up to the one for language selection are displayed in Eng­lish.

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8.3 Menu Structure

8.3.1 Menu Tree

Power ON

Start-up

Main menu

Operating

display

Status/

Measured

Values

Photo-

voltaics

Incoming

mains

Inverter

COM -

interface

AUX

signals

Blocking

(password-

protected)

Figure 25 Menu tree 

Fault

history

Settings

Contrast

Language

Real time

Acoustic

signal

generator

Information Help

Service

(password-

protected)

Password

From all menus the system automatically
returns to the operating display after
a certain period of time if no keys are
pressed on the DOU

8.3.2 Main Menu

Operating displ

Fault history

Information

Mon 05 Jan 2009

Figure 26 Main menu 

After start-up, the "Main menu" represents the highest menu level,
which means that you can open further submenus from here, and
you can always return to this level.

The "Main menu" has the typical menu structure.

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Settings

Service

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Additional submenus are displayed on the left-hand side. All se­lectable submenus are displayed in a frame. A black background
indicates the current cursor position. The bottom line displays the
current real time, which can be adjusted using the "Settings"
menu.

On the right-hand side, the current key function is represented as a
symbol which is displayed in a small framed area. You can move
the cursor using the "<" and ">" keys to select the corresponding
submenu. Use the ENTER key to activate a selected submenu.
Using the "?" key, you can call up the "Help" menu, which de­scribes all the various keyboard symbols.

8.3.3 Operating Display

You can call up the "Operating display" from the main menu. If the
DOU has not been used for some time, the system automatically
switches back to the operating display, no matter which menu it is
in.

The LCD background illumination is switched off if no further oper­ations are carried out and the system is not in an abnormal status.
In the event of a unit fault, the background illumination remains
switched on until the fault is acknowledged. If the inverter is in
night mode, the content of the LCD is cleared and "Sleep mode" is
displayed instead. The background illumination is also switched
off.

You can reactivate the DOU by pressing any key.

Figure 27 Operating display – Normal operation

The "Operating display" consists of 3 parts:
The left-hand side shows the current global unit status:

Figure 28 Operating display – Left-hand side

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At the top, a sun symbol indicates the current solar radiation trend.
If the sun is black or a moon symbol is displayed, the PV voltage is
so low that the inverter is in its idle state. An empty sun with no
rays also indicates that the PV voltage is still too low, with the in­verter in standby mode.

The inverter is represented in the middle of the left-hand section. If
a fault occurs or a message is present, the corresponding symbols
flash on the inverter. The bar on the left shows the PV voltage as a
symbol and a digital value. If the bar is completely filled in, this in­dicates that sufficient PV voltage is present. The bar on the right
shows the inverter status. If the inverter is feeding power into the
mains, the bar is filled in.

The total energy fed in is shown at the bottom of the display.

Examples of possible displays:

Figure 29 Example of operating display

The equipment is in its normal state, the inverter is feeding power
into the mains.

Figure 30 Example of operating display

Solar radiation is sufficient, the inverter is switched off. If the sine
symbol on the inverter is flashing, the inverter has been switched
off due to a fault or it is currently in the synchronisation phase.

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Figure 31 Example of operating display

Solar radiation is too low, the inverter is in standby mode.

Figure 32 Example of operating display

Solar radiation is too low, the inverter is in its idle state.

The middle section displays the unit's most important infeed values
in the form of digital values and a graph covering a certain period
of time. The current daily data is shown as standard. This display
appears automatically if no keys have been pressed for 1 minute.

Figure 33 Operating display – Central section

You can use the double arrow key to select the infeed periods be­low.

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Figure 34 Example of daily data

Daily data for the current day, previous day
(t = 00:00 – 04:00, 15 minute intervals)

Figure 35 Example of monthly data

Monthly data (t = day 1 – 31) for the last 12 months

Figure 36 Example of yearly data

Current yearly data (t = month 1 – 12)

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Figure 37 Example of yearly overview

Yearly overview
(t = year of start-up to current year)

The right-hand side shows how the key is currently assigned.

Figure 38 Operating display – Right-hand side

Here you can switch the inverter on or off, depending on the unit
status. If the operation has been blocked, this is indicated here via
a key symbol. If a blank button is shown here, a fault is present.
The flashing measured values menu then takes you to the inverter
menu, where detailed information can be found on the fault and
where you have to acknowledge it.

You can use the double arrow key to select the different display
types for the energy data logger.
Current day (default) -> Previous day -> Monthly overview -> Cur­rent yearly overview -> Yearly overview

If messages have been output or faults have occurred, you can
acknowledge the acoustic signal generator here; otherwise, this
key is not assigned.

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Use the bottom key with the measuring instrument symbol to call
up menus with detailed information on the status and the meas­ured values. This key flashes in the event of a fault in the unit, en­abling you to access menus containing additional fault information
directly.

8.3.4 Status/Measured Values

You can call up the "Status/Measured values" menu from the op­erating display
using the bottom key with the measuring instrument symbol.
Here you can use the "<", ">", "^" and ENTER keys to open the
submenus containing the statuses and measured values for the
individual unit components.
Press the ENTER key to return to the Status/Measured values
menu.

-- Status/data --

Photovoltaic

Inverter

AUX signals

Figure 39 Menu: Status/Measured values

You can use the "Photovoltaics" menu item to display the meas­ured values for the panels. Any faults in the DC distribution are
shown here too.

Grid side

COM interface

Menu

-- Photovoltaic --

UDC.[V]: 600 R-ISO[kOhm]: 100

[kohm]

IDC.[A]: 481

PDC[kW]: 289

Figure 40 Photovoltaics menu (example)

You can use the "Incoming mains" menu item to display the meas­ured values for the incoming mains. Any mains faults or faults in
the AC distribution are shown here too.

-- Grid side --

U

I

.[V]: 270 270 270

L12-31

..[A]: 587 587 587

L1-3

F....[Hz]: 50.0 Failures: 2

Figure 41 Menu: Incoming mains (example)

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You can use the "Inverter" menu item to display the statuses and
measured values for the inverter. You can toggle between the two
menus using the ">" and "<" keys.
In normal operation, the inverter can be switched on and off here,
using the top key. In the event of a deactivating fault, you can call
up a detailed description of the fault here. Once the fault has been
rectified, you will need to acknowledge it using the top key. A high­voltage symbol "V" will then appear on the top key.

-- Iverter-Status --

Grid operation MPP

-- Inverter-data --

U

I

.[V]: 270 270 270

L12-31

..[A]: 587 587 587

L1-3

P....[kW]: 261 S...[kVA]: 275

Q..[kvar]: 14 cos(phi).: 275

F....[Hz]: 50.0 E...[kWh]: 937

T1...[°C]: 25.0 T2 ...[°C]: 28.0

E..[kWh]: 2089336

....[h]: 1262

t

Figure 42 Menu: Inverter (example)

The voltage and current of the three phases are displayed as
measured values. The power values P, S, Q and cos-phi appear
underneath these voltages and currents.

These are then followed by the frequency F and the daily energy
E.

The ambient temperature of cabinet T1 and the supply air temper­ature of inverter stack T2 are shown as the temperatures.

Next come the total energy counter ∑E and the inverter operating
hours counter ∑t.

You can scroll through the measured values using the "v" and "^"
keys.

You can use the "COM interface" menu item to look up the status­es of the communication PCBs.

You can use the "AUX signals" menu item to look up the status of
optional general signals on the remote signalling board.

8.3.5 Blocking

You can call up the "Blocking" menu from the "Main menu". After
you have entered the current password, you can block operation of
the inverter (switching ON/OFF and fault acknowledgement). The
password must be entered digit by digit and then confirmed by
pressing the ENTER key.

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8.3.6 Fault History

8.3.7 Settings

8.3.8 Information

Protect PV.500-MH Operating Instructions

The default password set by the factory is: 1201.
In menus where switching operations are normally possible, block-

ing is indicated by a key.

You can call up the "Fault history" menu from the "Main menu". A
data logger that records the inverter's fault history is integrated in
the inverter unit. You can display the 20 most recent faults as of
the current date or as of a specific date.

You can call up the "Settings" menu from the "Main menu". Here
you can set the following parameters in the submenus:
LCD contrast, Language, Real time and Acoustic signal gener­ator for indicating faults and keyboard operation

You can call up the "Information" menu from the "Main menu". Us­ing this menu, you can call up information about the unit type, the
firmware versions and the available communication options.

8.3.9 Service

8.3.10 Help

You can call up the password-protected "Service" menu from the
"Main menu". The password must be entered digit by digit and
then confirmed by pressing the ENTER key.

The default password set by the factory is: 1201.
Once the current password has been entered, you can select a

submenu where you can change the DOU password.
 In the "Password" menu, you can set the password for block-

ing operation and for setting parameters. A range of 0000 to

9999 is possible.

Keep the password secure.

i

You can call up the "Help" menu from the "Main menu" using the
"?" key. This enables you to look up the meaning of the keyboard
symbols.

If you have forgotten the password, the DOU will need to
be reset at the customer's expense!

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