SolarMax 2000S User manual

TÜV
Rheinland
Product Safety
BAUART
GEPRÜFT
TYPE
APPROVED
SolarMax 2000S/3000S/4200S/6000S
05/08
Der Wechselrichter für netzgekoppelte Solarstromanlagen nThe inverter for grid-connected
PV installations nL’onduleur pour les installations électriques solaires couplées au réseau n
El inversor para sistemas de electricidad solar conectados a la red nL’inverter per impianti
solari di corrente collegati alla rete
Gerätedokumentation nInstruction Manual nDocumentation d’appareil n
Documentación del dispositivo nDocumentazione dell’apparecchio

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Introduction
Thank you for choosing a SolarMax solar inverter!
SolarMax converts the direct current from your solar system into grid-compliant
alternating current.
As a solar system operator you expect reliability and high yield from your system.
With our SolarMax range we offer inverters that fully meet these requirements. The
SolarMax inverter range is characterised by high efficiency and high availability.
The inverters carry the CE mark as an indication of compliance with European
Union Directives.
The “Type Approved” quality mark from TÜV Rheinland confirms compliance with
all relevant safety standards.
The Management
Sputnik Engineering AG
Höheweg 85
CH-2502 Biel/Bienne
E-Mail: [e-mail]
SolarMax string inverter: powerful, reliable, innovative.
Headquarters of Sputnik Engineering AG in the former Rolex building in Biel,
the Swiss watch metropolis.

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5 Troubleshooting 86
5.1 Introduction 86
5.2 Troubleshooting via the graphics display 87
5.3 Maintenance 90
6 Data communication 91
7 Technical description 93
7.1 Technical configuration SolarMax 2000S/3000S 93
7.2 Technical configuration SolarMax 4200S/6000S 93
7.3 Safety functions 94
7.4 Control functions 94
7.5 Technical data SolarMax 2000S/3000S 95
7.6 Technical data SolarMax 4200S/6000S 96
7.7 Glossary 97
7.8 Efficiency 98
8 Warranty 100
8.1 Warranty 100
8.2 Prolongation of guarantee 101
8.3 Limitation of liability and warranty 101
8.4 Applicable law 101
8.5 Place of jurisdiction 101
Contents
Introduction 54
1 Safety instructions 57
2 Installation 58
2.1 Installation 58
2.2 Electrical connection 61
2.3 Overvoltage protection 64
2.4 Switching on and off 65
2.5 Removal 65
2.6 Configurable limit values and operational settings 66
2.7 Heat sink temperature limit 67
2.8 Initial setup 67
2.9 Status signalling contact 68
3 Auto Test 70
3.1 Auto Test definition according to DK 5940 (Italy) 70
3.2 Start Auto Test 70
3.3 Procedure 71
4 Operation and fault display 73
4.1 Graphics display 73
4.2 LED display 73
4.3 Menu key symbols 74
4.4 Menu structure 75
4.5 Communication activity 82
4.6 Status messages 83
4.7 Alarm signals 85

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2 Installation
SolarMax inverters operate with high DC voltages. The complete system
must therefore be installed with great diligence, following all relevant
regulations. Contact with live parts can cause critical injuries or death.
Only suitably qualified personnel may connect the SolarMax inverter to
the mains. The installer must be approved by the relevant energy utility
company.
The maximum solar generator output can be found in the data sheet.
Warning: The device may only be opened in de-energised state (AC and DC
side). Wait for five minutes to allow the capacitors to discharge.
2.1 Installation
The device should be installed and connected with the cover closed. Sputnik
Engineering has developed a mounting rail in order to simplify the installation. Two
zinc-plated wall screws (6 x 50 mm) and two wall plugs are included. First install
the mounting rail on the wall. The SolarMax inverter can then be pushed onto the
mounting rail. Fasten the inverter at the left and right of the mounting rail with two
M6 x 12 screws.
1 Safety instructions
nLarge arcs may be generated if connectors are disconnected on the DC side dur-
ing operation. The DC cable must therefore be disconnected before removing
the MC connectors by means of the DC insulation switch on the left-hand side of
the inverter.
nCaution: The discharge duration of the capacitors is 5 minutes.
nPlease follow the detailed installation instructions in Section 2.
nFailure to observe the installation instructions will void any warranty and
liability.
nDisconnect your SolarMax inverter from the mains by disconnecting the AC feed
line before carrying out any maintenance and cleaning on the solar generator.
nPlease follow the general local installation regulations.
nSolarMax inverters may be installed only by qualified electricians.
nPlease do not commission the device if the casing is damaged or you are
not sure whether the device is working properly! Immediately disconnect
the device from the mains and from the solar generator!
nBefore opening the SolarMax device, the DC and AC feed lines must be
disconnected.

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is made from cast aluminium, which ensures adequate cooling via convection and
an additional fan.
Please note:
n The SolarMax may only be operated in an overvoltage category II AC installation!
If this is not the case, additional overvoltage-limiting elements (varistors) must
be installed at the network connection point.
n If the SolarMax device is installed inside a building, the space should be well
ventilated.
n The inverter must be mounted on a solid surface.
n For flammable surfaces an additional fireproof panel must be used, since the
heat sink may reach temperatures of up to 80 °C.
n Please refer to the technical data for the maximum permissible ambient tem-
perature.
n For optimum cooling the following distances should be adhered to: 0.5 m above,
0.5 m below, 0.3 m at the sides.
n Multiple devices should be installed above each other, if possible. For side-by-
side installation the minimum distance between devices should be 0.5 m. If
different SolarMax models are used, they should be installed in the following
order (top to bottom): SolarMax 2000S, SolarMax 3000S, SolarMax 4200S,
SolarMax 6000S.
n In external installations direct sunlight should be avoided. A protected installa-
tion location, for example under a canopy or a solar module, would be an advan-
tage. The device should also be protected from splashing, for example rainwater
dripping off roof or module edges.
n The inverters must not be installed in cabinets, enclosed recesses or similar
locations.
n Do not store flammable liquids near the inverter. Do not subject the inverter to
flammable gases or vapours.
n The inverter must be positioned out of reach of small children.
n The inverter and the supply lines must be installed such that they are inaccess-
ible to pets (especially rodents).
n Due to noise emission it is advisable to avoid installation in living areas.
Graphics display with operation DC insulation switch
AC connector Status signalling contact
DC connector
The SolarMax housing meets the requirements of protection type IP 54 and is suit-
able for outdoor installation. Protection rating IP 54 is only met if the enclosed AC
connector and the solar generator are connected via the MC-4 connectors.
In order to maximise the energy yield it is important to position the inverter cor-
rectly. The lower the ambient temperature, the more efficiently the inverter will
operate.
Notwithstanding the high efficiency of the SolarMax inverter, approx. 5 % of the
power has to be dissipated in the form of heat. To this end the base of the device
545 mm
522 mm
290 mm
1
2
3
1
2
3
4
5
5
4

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Assembly of the AC cable socket
SM2000S/3000S/4200S/6000S:
Ensure that the cable is de-energised.
n Connect the AC cable socket with a flexible cable according to EN60309-2 /
VDE 0623. Strands with a max. cross-section of 4 mm2can be connected.
n Push the rear part of the socket over the cable.
n Press wire end sleeves onto the stripped strands.
n Connect the individual wires with the insert in turn as follows
(Strand cross-section: see table on page 63)
Protective earth conductor PE with the screw terminal with earthing symbol
Neutral conductor N on screw terminal with the label N
Phase L on screw terminal with the label L
Tightening torque 0.8 – 1.0 Nm
n Ensure that the wires are connected properly.
n Snap the rear part of the socket onto the socket insert.
n Tighten the screwed cable gland.
Rear part of socket
2.2 Electrical connection
Sputnik Engineering supplies the SolarMax inverters prewired and ready for con-
nection. All connections are pluggable. The device therefore does not have to be
opened.
The following connections are available:
n DC: 3 x 2 MC4 sockets (3 strings with MC4 connectors)
n AC: Wieland flange connector
n Communication: 2 x RJ45 (sealed with protective caps)
n Status signalling contact M12 connector
Wieland flange connector
AC feed line
3 x 2 pairs of MC4 connectors
DC feed line
2 x RJ45 sockets
Data communication
Status signalling contact
SM2000S/3000S/4200S/6000S
Socket insert
Screwed cable gland
If the RJ45 sockets are used and the inverter is exposed to the weather, please
use products from the VARIOSUB-RJ45 range with IP67 protection from Phoenix
Contact. This ensures that the installation meets the requirements of IP54.
n RJ45 connector, 8-pin, quick connector system (art. no. 1658493)
n Pre-assembled Ethernet cable, 8-pin RJ45/IP67 on RJ45/IP67 (art. no.
1658480-)
Available from www.phoenixcontact.com.

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Back-up fuses and cable cross-sections
Follow the generally accepted state of the art. Start on the AC side.
AC side:
Each inverter must be protected separately! No consumers may be connected be-
tween the fuse and the inverter!
Type 2000S 3000S 4200S 6000S
Back-up fuse
(characteristic C) 10 A 13 A 20 A 25 A
Minimum
cable cross-section (strand) 1.5 mm21.5 mm22.5 mm22.5 mm2
We recommend using larger conductor cross-sections in order to minimise line
losses.
The flexible cable is connected to a junction box with a maximum length of one
metre. From here the installation may be continued with a rigid TT cable.
DC side:
Select the cable cross-sections on the DC side to suit your system configuration
and in accordance with the relevant installation regulations.
General information:
n When connecting several SolarMax devices, distribute the inverters over the
three mains phases.
n AC and DC cables must be suitable for the expected loads, currents and ambient
conditions (temperature, UV, etc.).
n The personal protection regulations must be followed when the inverter is con-
nected to the AC system.
n Ensure that the mains cable is de-energised before connecting the device.
n Verify the polarity before installing the DC side.
n Ensure short circuit- and earth-leakage-proof connection of the DC cables to the
MC terminals.
n Caution: Due to the earth-fault monitoring function, neither the minus nor the
plus terminal should be earthed. Otherwise the integrated insulation monitoring
function would prevent grid feeding.
n Connect the DC side via the MC connectors.
> 600 V> 600 V
Large arcs may be generated if connectors are disconnected on the DC or
the AC side during operation. The AC supply and the DC insulation switch
must therefore be disconnected before removing the connectors.
Earthing (second protective earth connection)
Without a connection to the solar generator the stray current of the inverter is less
than 3.5 mA on the AC side. However, during operation of the solar generator, the
stray current at the inverter may far exceed the value of AC 3.5 mA. In this case a
second, fixed protective earth connection according to EN 50178 is required. The
cross-section of the second protective earth conductor should have at least the
same cross-section as that of the main terminal. A second protective earth conduc-
tor can be connected below the status signalling contact.
2.3 Overvoltage protection
SolarMax inverters feature integrated surge protectors at the input and output. On
the DC side 2 surge arresters (varistors) for the plus and minus terminal to earth
are installed. On the AC side a surge arrester (varistor) is installed between the
phase and neutral. All surge arresters meet the requirements of class D according
to VDE 0675-6 or Type 3 according to EN 61643-11.
Note the following if the overvoltage protection on the DC is to be increased:
n For inverters without galvanic isolation the DC terminals have a potential rela-
tive to earth that may be higher than the peak value of the mains voltage. For
this reason, the response voltage of the surge arrester must be higher than
600 Vpeak.
Solar generator
The diagram on the left shows the
connection of additional surge arres-
ters on the DC side.

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2.4 Switching on and off
n All SolarMax inverters operate fully automatically and maintenance-free. The
isolating switches between the solar generator, the inverter and the 230 V mains
supply remain on at all times. SolarMax will start and transfer power to the
230 V grid when the irradiance is high enough. Otherwise the device remains in
standby mode and is thus available for grid feeding at all times. Overnight the
electronic system is disconnected from the mains.
Voltage may only be applied on the DC and AC side of the SolarMax with
the device closed.
Switching on:
n Switch on DC insulation switch.
The graphics display powers up.
During the night or at times of insufficient irradiance the graphics display turns
itself off (no energy consumption).
n Switch on the AC isolating switch (may be fused).
Switching off:
n Switch off the AC insulation switch.
Large arcs may be generated if connectors are disconnected on the DC
side during operation.
n Switch off the DC insulation switch.
Graphics display switched off.
2.5 Removal
n The device does not have to be opened for demounting.
n The inverter must be de-energised. First disconnect the device from the mains
on the AC side via the AC line protection breaker or the fuse. Then open the
DC insulation switch in order to disconnect the inverter from the solar generator
field. Now remove the connectors.
n Before releasing the screws ensure that the bottom of the device (heat sink) has
cooled sufficiently to allow the device to be safely handled.
n Release the two locking screws on the left and right and remove the inverter
from the mounting.
2.6 Configurable limit values and operational settings
In the SolarMax S series the following parameters can be set manually via the inter-
face with the MaxTalk software. The settings are password-protected. A password
application form can be ordered via the SolarMax hotline. The password is only
made available to installers who sign the form. The password is not made available
to private individuals or system operators.
Parameter Unit Regional settings Password-
protected
setting
DE/CH IT ES FR Other
Vac max V 264 274 253 264 300 184…300
Vac min V 184 186 196 196 184
f max Hz 50.2 50.3 51 50.5 55 45…55
f min Hz 47.5 49.7 48 49.5 45
df/dt max Hz/s NA 0 (Inactive) NA NA NA 0.1…1
Vac 10min max V 253 0 (Inactive) 264 264 243…264
Ierr max mA 300 300 300 300 300 50…300
Iac mean max A 1 0.5% of
Iac rated* 1 1 1 0.05...1
Restart delay s 0 0 180 0 0 0…600
Pac max
SM2000S W 1980 1980 1980 1980 1980 990…1980
Pac max
SM3000S W 2750 2750 2750 2750 2750 1375…2750
Pac max
SM4200S W 4180 4180 4180 4180 4180 2090…4180
Pac max
SM6000S W 5060 5060 5060 5060 5060 2530…5060
Iac max
SM2000S A 12 12 12 12 12 6…12
Iac max
SM3000S A 12 12 12 12 12 6…12
Iac max
SM4200S A 19 19 19 19 19 9…19
Iac max
SM6000S A 22 22 22 22 22 11…22
NA: not available * Iac max = 1.1 x Iac rated
The set values can be queried via the display in the main menu (see section 4.4).

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2.8 Initial setup
The “Initial Setup” starts automatically when the inverter is switched on for the
first time. This procedure only has to be completed when the device is commis-
sioned for the first time. To start with, English text appears inviting you to select
the required language. The subsequent setup messages will then appear in the se-
lected language. Then select the installation country. In the third step please check
the date and the time and correct if necessary. The date set here is stored as the
commissioning data and can be retrieved via the “Information” menu. All settings
(apart from the country setting) can be modified later via the “Settings” menu.
The initial setup is still concluded with the key.
Confirm the installation country with the key.
Please note: After this confirmation, the selected country can no longer
be changed!
Exit this menu with the key. “Initial setup” will start again.
Important: The country must match the location of the inverter in order to
ensure that the inverter operates within country-specific limit values.
Correct setting of the country ensures that the inverter operates within coun-
try-specific limit values. If the selected country does not match the actual
installation site the inverter will load incorrect limit values.
This may invalidate the ESC operating licence for the inverter.
2.7 Heat sink temperature limit
For safety reasons the temperature of the heat sink is limited to 80 °C. At ambient
temperatures of more than 45 °C the heat sink temperature may reach 75 °C. In
this event the maximum inverter output is reduced temporarily. If the temperature
rises above 80 °C the device switches off automatically in order to prevent thermal
overload.
2.9 Status signalling contact
The status signalling contact is used for remote monitoring. The potential-free
relay contact enables the status of the inverter to be monitored. The contact is
located at the front of the unit between the DC and AC ports.
The functionality of the status signalling contact can be set in the Settings menu
as follows:
Setting Function
Off The status signalling contacts are deactivated (remain in inactive
state).
Mains In mains mode the NO status signalling contact closes immedi-
ately and is opened again with the set delay as soon as the device
is no longer in feed mode.
Error The NO status signalling contact closes after the set delay time
if a malfunction, fault or alarm occurs during this time. The relay
opens immediately when the fault is no longer present.
The electronic monitoring system is supplied from the solar generator, i.e. the sta-
tus signalling contact is open during the night and when the DC side is switched
off.
The events that may trigger the status signalling contact are listed in Section 4.6
Status messages.

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3. Auto Test
The Auto Test function is required according to the Italian DK 5940 standard. It
enables verification of the voltage and frequency monitoring function. The Auto
Test option is only available in the main menu if “IT” (Italy) was selected as the
installation location.
The Auto Test functionality and procedure is described below.
3.1 Auto Test definition according to DK 5940 (Italy)
During the Auto Test procedure in mains mode the trigger threshold for AC voltage
and frequency monitoring is varied linearly with a ramp of ≤0.05Hz/s and ≤ 0.05
Vn/s (Vn = 230 Vac). At some point during the test the threshold will coincide with
the current measured value, leading to triggering of the monitoring intervention.
After each test step the values of the trigger thresholds, delay times, current meas-
ured frequency and AC voltage values, and the standard threshold trigger value are
displayed.
3.2 Start Auto Test
To start the Auto Test the inverter must be installed as described in Section 2. The
Auto Test can be activated only if there is sufficient irradiance and the inverter is
connected to the mains and is in feed mode.
1. Wait until the inverter has connected itself to the mains.
2. Select Auto Test in the main menu.
3. Answer the question whether the Auto Test should be executed with YES.
4. The Auto Test now runs automatically.
Technical data of the status signalling contacts
U max I max
250 VAC 1 A
30 VDC 1 A
A suitable mating connector for
connecting the status signalling
contact can be ordered via the
SolarMax hotline.
Status signalling contact
Pin assignment:
Pin Contact:
1NO
2COM
3NC
COMCOM
NC
NO NO
NC
Inactive state

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3. The trigger value, the delay time, the current value and the default voltage
monitoring value (Vac min) are displayed.
Maximum frequency
1. The set frequency monitoring threshold f max is displayed.
2. The threshold value is decremented linearly until it reaches the current mains
frequency value and mains monitoring is triggered.
3. The trigger value, the delay time, the current value and the default frequency
monitoring value (f max) are displayed.
Minimum frequency
1. The set frequency monitoring threshold f min is displayed.
2. The threshold value is incremented linearly until it reaches the current mains
frequency value and mains monitoring is triggered.
3. The trigger value, the delay time, the current value and the default frequency
monitoring value (f min) are displayed.
After the Auto Test is complete the inverter returns to normal operation.
PLEASE NOTE: if a fault occurs during the tests or the irradiance is too low the
Auto Test is aborted and the message “Auto Test aborted” appears in the display
together with an associated error message.
3.3 Procedure
Maximum voltage
1. The set voltage monitoring threshold Vac max is displayed.
2. The threshold value is decremented linearly until it reaches the current mains
voltage value and mains monitoring is triggered.
3. The trigger value, the delay time, the current value and the default voltage
monitoring value (Vac max) are displayed.
Minimum voltage
1. The set voltage monitoring threshold Vac min is displayed.
2. The threshold value is incremented linearly until it reaches the current mains
voltage value and mains monitoring is triggered.

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4.3 Menu key symbols
Seven symbols are used for menu prompting:
Symbol Function / description
Scrolling upwards / increment number, or
next element
scroll down or previous element
Back to higher-level menu
Select next number
Shows the required submenu or stores
any changes
Starts edit mode for the selection
Cancel
4 Operation and fault display
4.1 Graphics display
The graphics display at the front is used to display system parameters, status
information, and SolarMax fault messages, thereby offering the user convenient
options for obtaining information about the device status.
The graphics display is backlit in order to improve readability under adverse light
conditions. The backlight switches on whenever one of the three keys is pressed,
and remains on for 180 seconds after the last key activity.
4.2 LED display
In addition to the graphics display, an LED display is available for indicating the
device status (green, red or orange).
LED display Device status Description
Off Offline Device is switched off
Flashing (green) Startup Device starting (initialisation,
restart delay)
Green Mains operation Device feeding in
Orange Malfunction Malfunction (e.g. mains
monitoring, overtemperature)
Flashing (red) Error Device fault
Green/red flashing Alarm Alarm messages see Section 4.7

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Overview
If none of the three keys is pressed for 120 seconds the display automatically
switches to the Overview menu, which shows the three main parameters and the
operating status.
➡current inverter output
➡yield today
➡total yield since commissioning
➡operating status
Measured Values
The following measurement readings can be displayed:
n Vdc ➡current solar generator voltage
n Idc ➡current solar generator current
n Vac ➡current mains voltage
n Iac ➡current infeed current
n Pac ➡current inverter output
n Frequency ➡mains frequency
n Temperature ➡heat sink temperature
n Fan (on/off) ➡fan switched on or off
A maximum of four measured values can be displayed simultaneously. Use the
arrow keys and to switch to other values. Use the key to switch back
to the main menu.
4.4 Menu structure
The following submenus can be called up from the main menu:
n O v e r v i e w
n Measured Values
n Statistics
Days
Months
Years
Total
Reset
n Configuration
n Settings
Language
Time
Date
Device address
Ethernet
IP address
Netmask
TCP Port
n Auto Test*
n Information
*Auto Test if regional setting is set to IT (see Section 3)
Use the arrow keys and to select the required menu. Use the key to
switch to the selected menu.

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➡monthly yield
➡ maximum power fed to the grid
➡operating hours
Use the arrow keys and to display the yields for the last 12 months. Use the
key to switch back to the Statistics menu.
➡annual yield
➡maximum power fed to the grid
➡operating hours
Use the arrow keys and to show the yields for the last ten years. Use the
key to switch back to the Statistics menu.
This screen shows the total yield and the operating hours of the inverter since it
was commissioned. Use the key to switch back to the Statistics menu.
➡daily yield
➡maximum power fed to the grid
➡operating hours
Use the arrow keys and to display the yields for the last 31 days. Use the
key to switch back to the Statistics menu.
Statistics
The following statistics can be displayed:
n Days
n Months
n Years
n Total
n Reset
Use the arrow key to select the required menu. Use the key to switch to the
selected menu. Use the key to switch back to the main menu.

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Use the arrow keys and to display any value. Use the key to switch back
to the main menu.
Settings
The following settings can be implemented via the graphics display:
Language Language selection: German, English, French, Italian or
Spanish
Time Internal clock setting
Date Current date setting
Device address Enter a device address between 1 and 249. If several
inverters are connected to form a network, each device
must have a different address.
Ethernet Switches the Ethernet interface on or off
IP address Ethernet interface configuration (see section 6)
Netmask Ethernet interface configuration (see section 6)
TCP port Ethernet interface configuration (see section 6)
Status relay Defines the function of the status signalling contact (see
Section 2.9)
Status relay delay Delay time setting for the status signalling contact
Use the key to confirm resetting of all statistics. Use the key to exit the
menu without resetting the statistics.
Configuration
The following limit values and operating parameters cannot be modified via
the graphics display, because they are part of the country-specific settings (see
also section 2.6).
Country The installation country set during commissioning is
displayed here
Vac min Minimum permissible mains voltage
Vac max Maximum permissible mains voltage
Vac 10min max Maximum permissible mean value of the mains voltage
over the last 10 minutes
Iac max Maximum mains current
Ierr max Maximum permissible fault current (rms value) on the
DC side
Iac mean max Maximum permissible DC component of fed-in mains
current
Pac max Maximum AC output that can be fed in
f max Maximum permissible mains frequency
f min Minimum permissible mains frequency
Restart delay Grid feeding delay after disconnection from the mains
df/dt max Maximum permissible mains frequency variation per
second

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In edit mode each digit is modified individually. Example: use the key to incre-
ment the selected digit. Once the right value has been selected use the key to
switch to the next digit and increment it with the key. Once all digits have been
set, exit edit mode with the key.
Information
This menu shows the following information:
n Device type (SM2000S, SM3000S, SM4200S, SM6000S)
n Firmware version
n Date of commissioning
n Web address (www.solarmax.com)
Use the arrow key to select the required parameter. Use the key to switch
to edit mode for the selected parameter. Use the key to switch back to the main
menu.
Use the key to switch back to the main menu.
4.5 Communication activity
If the symbol in the top line of the display is lit the inverter has received data.
Symbol Mode Function / description
No communication (no symbol is displayed)
Comm
Communication activity; this is displayed if the inverter has
received data
(synonymous with the activity display of network cards)

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4.6 Status messages
The following table shows the possible status messages, subdivided into four ca-
tegories:
Status message Cause
Startup
LED: Flashing
(green)
Irradiance too low The solar irradiation is too low; feed
mode is not possible
Startup... In this state the inverter checks all
requirements that must be satisfied in
order to enable secure feed mode
Restart in...s After a shutdown this value indicates
the number of seconds after which
feed mode will resume
Mains operation
LED: Green
MPP operation The inverter has found the operating
point of the solar generator with the
maximum inverter output
Maximum power The inverter limits the output to the
maximum power of the device (this
may happen if the solar generator is
oversized)
Mains operation The inverter is connected to the mains
and is operating in feed mode
Idc limitation The inverter limits the solar generator
current to the maximum permissible
value (this may occur if the solar
generator is designed such that the
current at MPP exceeds the maxi-
mum permissible input current of the
inverter)
Iac limitation The inverter limits the mains current
to the maximum permissible value
(this may occur in the event of strong
irradiance fluctuations or if the solar
generator is oversized)
Status message Cause
Malfunction
LED: Orange
Vdc too high The solar generator voltage is too
high
Iac asymmetric The DC component of the mains cur-
rent is too high
Ierr too high A fault current in excess of the
permissible limit value has occurred
on the solar generator side
No mains No mains voltage
Frequency too high The mains frequency is too high
Frequency too low The mains frequency is too low
Mains error A mains fault was detected
Bad mains quality The 10-minutes mean value of
the mains voltage exceeds the
permissible limit value (according to
VDE0126-1-1)
Vac too high The mains voltage is too high
Vac too low The mains voltage is too low
Temp. too high The inverter has interrupted the feed
mode because the heat sink tempera-
ture exceeds 80 °C
(see also section 2.7)
Insulation fault An insulation fault was detected in
the solar generator or in the wiring of
the solar generator
Fault
LED: Flashing (red)
Device error An internal inverter fault has
occurred
Overvoltage The DC link voltage of the inverter is
too high
Overcurrent An overcurrent has occurred in the
inverter

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4.7 Alarm signals
The alarm messages are displayed in the graphics alternately with the status mes-
sage. An alarm does not lead to shutdown, although loss of yield is to be expected.
The LED display flashes green and red if an alarm is present. As long as the inverter
does not operate in mains mode the alarm message is only displayed in the graph-
ics display. In this case the LED display indicates the current device status.
The following table shows the possible alarm messages:
Alarm message Cause
Alarm
LED: green/red
flashing
Temp. limitation The inverter output is reduced
when the heat sink temperature
reaches 75 °C (see also Section
2.7).
Failure fan 1 A failure of the internal fan has
been detected.
Failure fan 2 A failure of the external fan has
been detected.
Failure temp. sensor A failure of the temperature sensor
has been detected.
5 Troubleshooting
5.1 Introduction
Sputnik Engineering only supplies SolarMax inverters that have passed our exten-
sive tests. Furthermore, for each device a long-term test under full-load conditions
is carried out over several hours.
In the unlikely event of your PV system being affected by a fault we recommend the
following procedure:
1. Ensure that the solar generator is correctly installed and connected to the
mains. Check the connections and the procedure described in Section 2
(Installation).
2. The integrated graphics display facilitates troubleshooting. Further details are
provided in the following subsection.
3. Contact our SolarMax hotline if you are unable to rectify the fault with the
suggested measures.
SolarMax-Hotline
Calling from Germany: 0180 / 276 5 276
Calling from Austria: 0049 / 180 276 5 276
Calling from Switzerland: 032 / 346 56 06
Calling from other countries: 0041 / 32 346 56 06
Fax Hotline: 0041 / 32 346 56 26
E-mail: [e-mail]
www.solarmax.com

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5.2 Troubleshooting via the graphics display
Fault: No graphics display
Possible cause Remedy
DC insulation switch switched off Switch on the DC insulation switch
Irradiance too low Wait until irradiance is high enough
Internal fault Notify SolarMax hotline
Strings interrupted Rectify interruption
Malfunction: Graphics display flashes periodically, or
Status message: Irradiance too low
Possible cause Remedy
Irradiance too low Wait until irradiance is high enough
Malfunction: Overtemperature
Possible cause Remedy
Ambient temperature too high Ensure air can circulate at the side of
the cooling fans
Insufficient air circulation
Fan blocked Clean / replace fan
(see Section 5.3)
Malfunction: Iac asymmetric
Possible cause Remedy
DC component of the mains current
is too large
First switch off AC side and then DC
side for 20 seconds, then switch on
again
For recurring faults contact the
SolarMax hotline
Malfunction: Ierr too high
Possible cause Remedy
Fault current too large as level-change
or absolute value
Check solar generator and DC cabling
Earth leakage or insulation fault on
the DC side
Equipotential bonding between
inverter and module frame
Malfunction: Insulation fault
Possible cause Remedy
Earth leakage or insulation fault on
the DC side
Check solar generator and DC cabling
Phase and neutral conductor inter-
changed
Swap phase and neutral conductor in
the AC coupling connector
Malfunction: No mains, frequency too high
or too low
Possible cause Remedy
No grid or mains voltage interruption Check AC connection
Mains frequency outside the tolerance Wait until the mains frequency is
within tolerance
Malfunction: Mains fault
Possible cause Remedy
Stand-alone operation was detected For recurring faults contact the
SolarMax hotline

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Malfunction: Vac too low or Vac too high
Possible cause Remedy
Mains voltage too low / too high Check mains voltage
Malfunction: Vdc too high
Possible cause Remedy
The solar generator voltage exceeds
the permissible value
(see Technical data)
Immediately disconnect the DC
insulation switch
Check module configuration
Alarm: Failure fan 1
Possible cause Remedy
Internal temperature too high or
internal fan faulty
For recurring faults contact the
SolarMax hotline
(A faulty fan leads to power reduction
or even total shutdown.)
Alarm: Failure fan 2
Possible cause Remedy
Internal temperature too high, or
external fan faulty
For recurring faults contact the
SolarMax hotline
Alarm: Failure temp. sensor
Possible cause Remedy
Internal temperature too high or
temperature sensor faulty
For recurring faults contact the
SolarMax hotline
Alarm: Temp. limitation
Possible cause Remedy
Internal temperature too high: device
reduces output. Check function of the
external fan; check and clean the fan
grille
For recurring faults contact the
SolarMax hotline
Fault: Device error
Possible cause Remedy
Internal fault For recurring faults contact the
SolarMax hotline
The following error messages can be displayed only during SolarMax initialisation.
They indicate a device fault:
Error message Remedy
SUPPLY FAILURE For recurring faults contact the
SolarMax hotline
ADC REFERENCE ERROR
EEPROM ERROR
CONFIGURATION ERROR
IRRADIANCE TOO LOW Wait until irradiance is high enough
5.3 Maintenance
The SolarMax inverters generally operate maintenance-free. However, we recom-
mend checking the AC output in the LC display during strong irradiance at regular
intervals.
The cumulative operating and kilowatt hours provide additional information about
the performance of your PV system.
A faulty external fan can be replaced without having to open the device: simply
release the four fastening screws of the fan and open the cable plug.
Before changing the external fan disconnect the DC circuit breaker and the AC
side!