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Grid PV Inverter
CMS 4000
CMS 5000
Installation and Operation Manual
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Edition 2.0 2010/06
Before you start ......................................................................................................................... 3
1. Content .............................................................................................................................. 4
2. Installation ............................................................................................................................. 5
1) Safety instructions ............................................................................................................. 5
2) Fixed on the wall ............................................................................................................ 6
3) Connecting to the grid (AC utility) .................................................................................. 7
4) Connect to PV Panel (DC input)...................................................................................... 8
5) Checking ......................................................................................................................... 9
6) System Diagram ............................................................................................................. 9
3. Modes of operation ............................................................................................................. 10
1) Normal mode: .............................................................................................................. 10
2) Fault mode ................................................................................................................... 10
3) Shutdown mode ........................................................................................................... 10
4. Inverter Status ..................................................................................................................... 12
5. Communications .................................................................................................................. 12
1) Communications software instructions ....................................................................... 13
2) Monitor ........................................................................................................................ 13
3) Detailed information .................................................................................................... 13
6. Trouble shooting ................................................................................................................. 13
7. Specifications ....................................................................................................................... 15
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Before you start
Congratulations on choosing CMS Grid PV Inverter, the products from CMS Grid PV
Inverter are a highly reliable products due to their innovative design and perfect quality
control. Such inverters are used in high demand, grid-linked PV systems.
This manual contains important information regarding installation and safe operation of
this unit. Be sure to read this manual carefully before using.
If you encounter any problems during installation or operation of this unit, first check this
manual before contacting your local dealer or representative. Instructions inside this
manual will help you solve most installation and operation difficulties.
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1. Content
CMS 4000 and CMS 5000 Design Overview
Front View Bottom View
Opening the package
After opening the package, please check the contents of the box. It should contain the
Operation LED
Solar panel input
RS232 RS485
LCD Display
Showing the inverters status
Utility (AC) connector
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following:
Item
Name
Quantity
1
CMS 4000 or CMS 5000
1
2
mounting frame
1 3 mounting screws
4 4 safety-lock screws
2 5 AC socket assembly
1 6 Instruction manual
1
7
Monitor software(disk)
1 (Optional)
Before starting installation please consider the following items:
This unit is designed for outdoor usage（IP65）. Do not expose the PV-Inverter to direct
sunlight. Direct sunlight increases the internal temperature that may reduce conversion
efficiency.
Check the ambient temperature of installation is within specified range -20 ~ +55℃
The AC grid voltage is between 190 and 260VAC, 50Hz.
Qualified personnel are performing the installation.
Adequate convection space surrounds the inverter.
Inverter is being installed away from explosive vapors.
No flammable items are near the inverter.
it is recommended that Inverter is installed where the ambient temperature is between
0~45℃
2. Installation
1) Safety instructions
A. Do not remove the casing. Inverter contains no user serviceable parts. Refer
servicing to qualified service personnel.
B. Both AC and DC voltage sources are terminated inside the PV Inverter. Please
disconnect these circuits before servicing.
C. When a photovoltaic panel is exposed to light, it generates a DC voltage. When
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connected to this equipment, a photovoltaic panel will charge the DC link capacitors.
D. Energy stored in this equipment’s DC link capacitors presents a risk of electric
shock. Even after the unit is disconnected from the grid and photovoltaic panels,
high voltages may still exist inside the PV-Inverter. Do not remove the casing until at
least 10 minutes after disconnecting all power sources.
E. This unit is designed to feed power to the public power grid (utility) only. Do not
connect this unit to an AC source or generator. Connecting Inverter to external
devices could result in serious damage to your equipment.
F. Carefully remove the unit from its packaging and inspect for external damage. If
you find any imperfections, please contact your local dealer.
G. Although designed to meet all safety requirements, some parts and surfaces of
Inverter are still hot during operation. To reduce the risk of injury, do not touch the
heat sink at the back of the PV-Inverter or nearby surfaces while Inverter is operating.
2) Fixed on the wall
A. Select a wall or solid vertical surface that can support the PV-Inverter.
B. Inverter requires adequate cooling space. Allow at least 20cm space above and
below the inverter.
C. Using the mounting frame as a template, drill 4 holes as illustrated in the
following figures.
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D. Fix the mounting frame as the figure shows. Do not make the screws to be flush
to the wall. Instead, leave 2 to 4mm exposed.
E. Hang the inverter on the mounting frame
F. Check the installation conditions
a) Do not install the PV-Inverter on a slanted surface
b) Check the upper straps of PV-Inverter and ensure it fits on to the bracket
c) Insert safety-lock screws to the bottom leg to secure the inverter.
d) Check the secure mounting of the PV-Inverter by trying to raise it from the bottom.
The PV-Inverter should remain firmly attached.
e) Select the installation location so that the status display can be easily viewed.
f) Choose a strong mounting wall to prevent vibrations while inverter is operating.
3) Connecting to the grid (AC utility)
A. Measure grid (utility) voltage and frequency. It should be 230VAC (or 220VAC) ,
50/60Hz and single phase.
B. Open the breaker or fuse between PV Inverter and utility.
C. For Inverter (CMS 4000 and CMS 5000 ), connect AC wires as follows:
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Insert utility wires through cable gland. Connect wires according to polarities
indicated on terminal block. L→LINE (brown or black), N→Neutral (blue)
and G →system ground (yellow-green).
Fasten the gland plate with attached screws.
Twist the gland so that the cable is firmly fixed.
Refer to left figure.
Insert Line wire to Pin L, Neutral wire to Pin N and Ground wire to Pin G.
Suggested cable width for AC wire
Model
Φ(mm)
Area(mm2)
AWG no.
CMS 4000
≥3.2
≥3
≤12
CMS 5000
≥4.0
≥3.75
≤10
4) Connect to PV Panel (DC input)
A. Make sure the maximum open circuit voltage (Voc) of each PV string is less than
550VDC UNDER ANY CONDITION.
Pin N
Pin L
Pin G
shell
Pressing
screw cap
AC wire
male insert With
coupling ring
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B. Use MC (Multi-contact) connectors for PV array terminals.
C. Connect the positive and negative terminals from the PV panel to positive (+)
terminals and negative (-) terminals on the PV-Inverter. Each DC terminal on Inverter
can withstand 20ADC.
D. Before connecting PV panels to DC terminals, please make sure the polarity is
correct. Incorrect polarity connection could permanently damage the unit. Check
short-circuit current of the PV string. The total short-circuit current of the PV string
should be less than the inverter’s maximum DC current.
E. High voltages exist when the PV panel is exposed to the sun. To reduce risk of
electric shock, avoid touching live components and treat connection terminals
carefully.
5) Checking
A. When the PV panels are connected and their output voltage is greater than 100
VDC but the AC grid is not yet connected, the message on the LCD display produce
the following messages in order: “MODEL= XkW”-> “Waiting” -> “Disconnect Grid”.
The display repeats “Disconnect Grid” and the RED “fault LED” turns on.
B. Close the AC breaker or fuse between PV-Inverter and grid. The normal
operating sequence begins.
C. Under normal operating conditions the LCD displays “Pac =xxxx.xW”. That is the
power fed to the grid. The green LED turns lights-up.
D. This completes the check.
6) System Diagram
A. PV Panel: Provide DC power to inverter
B. CMS: Converts DC (Direct Current) power from PV panel(s) to AC (Alternating
PV panel
CMS
Connection
system
Utility
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Current) power. Because Inverter is grid-connected it controls the current amplitude
according to the PV Panel power supply. Inverter always tries to convert the
maximum power from your PV panel(s).
C. Connection system: This “interface” between Utility and PV-Inverter may
consist of electrical breaker, fuse and connecting terminals. To comply with local
safety standards and codes, the connection system should be designed and
implemented by a qualified technician.
D. Utility: Referred to as “grid” in this manual, is the way your electric power
company provides power to your place. Please note that Inverter can only connect
to low-voltage systems (namely, 230VAC, 50/60Hz).
3. Modes of operation
There are 3 different modes of operation.
1) Normal mode:
In this mode, Inverter works normally. Whenever the supplied power from PV panel
is sufficient (voltage>150VDC), Inverter converts power to the grid as generated by
the PV panel. If the power is insufficient, (voltage<120VDC) Inverter enters a
“waiting” state. Whilst “waiting” Inverter uses just enough power from the PV panel
monitor internal system status. In normal mode the green LED is on.
2) Fault mode
The internal intelligent controller can continuously monitor and adjust the system
status. If Inverter finds any unexpected conditions such as grid problems or
internal failure, it will display the information on its LCD and light up the red “Fault”
LED.
3) Shutdown mode
During periods of little or no sunlight, Inverter automatically stops running. In this
mode, Inverter does not take any power from the grid. The display and LED’s on
the front panel do not work.
Notes
Operating Inverter is quite easy. During normal operation, Inverter runs automatically.
However, to achieve maximum conversion efficiency of Inverter please read the following
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information:
a. Automatic ON-OFF: Inverter starts up automatically when DC-power from the PV
panel is sufficient. Once the PV-Inverter starts it enters one of the following 3 states:
Standby: The PV string can only provide just enough voltage to minimum
requirements of the controller.
Waiting: When the PV string DC voltage is greater than 100V, Inverter enters a
“waiting” state and attempts to connect to the grid.
Normal operation: When PV string DC voltage is greater than 150V, Inverter
operates in the normal state.
b. Starting-up display sequence: Once the PV power is sufficient, Inverter displays
information as shown in the flow chart as follow:
“User: xxxx”→ “Spec:xxxx” → “Model:x.xkW” → “SW Version :xx.xx” →
“Checking xxS” → “Normal State” → “Pac= xxx.x W”.
c. LCD backlight control: To save power, the LCD display’s backlight automatically
turns off after 30 seconds.
LCD display
The first line of LCD
State
Display content
Remark
Wait State
Waiting
Initial waiting
Checking xxS
System checking
Reconnect in xxS
System checking
Standby
PV voltage low
Normal State
Pac = xxxx.x W
Inverter watt at working
Auto Test State
Auto testing
Protection auto test
Fault State
System xx Fault
System fault
Permanent State
Inverter xx Damaged
Inverter fault
Program State
Programing
Update software
The second line of LCD
Cycle display
Display time /s
Remark
User: xxxx
1
The user type
Spec: xxxx
1
The inverter spec type
Model:x.xkW
1
The inverter model
SW Version:xx.xx
1
The software version
Etotal: xxxkWh
2
The energy total
Etoday: xx.xkWh
2
The energy today
Ttoday:xxhxxmin
2
The work time today
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4. Inverter Status
Inverter is designed to be user-friendly; therefore, the status of the Inverter can be easily
understood by reading the information shown on the front panel display. All possible
messages are shown in the following table.
Display
Operation
System Fault
Disconnect Grid
disconnect grid
Grid V Fault
grid voltage out range
Grid F Fault
grid frequency out range
Low Isolation
low input isolation
High PV Voltage
PV input voltage high
High Ground I
GFCI active
High Temperature
temperature too high
Inverter Fault
EEPROM Damaged
EEPROM has problem
Please Initiate
System has not been initiated at the first time
GFCI Damaged
GFCI device damaged
Sensor Damaged
Output DC sensor damaged
SCI Damaged
The communication between the two MCU fault
Not Consistent
The datas are not the same of the two MCU
High DC INJ
Output DC Injection Too High
Relay Damaged
Output Relay Failure
High Bus Voltage
DC Bus Voltage Is Too High
Auto test failed
Auto test failed
2.5V Ref Fault
2.5V Reference Voltage Inside has problem
5. Communications
PV:xxxV BUS:xxxV
2
The PV and Bus voltage
AC:xxxV xx.xHz
2
The Grid voltage and frequency
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1) Communications software instructions
Connect PV Inverter and PC by RS232 wire. Open monitoring software “PV Inverter
COM.exe”.If you use “PV Inverter COM.exe”, Open the “PV Inverter COM.txt” file in the
path :C:\WINDOWS. The file records the user's software and the main parameter settings,
click on the main interface and the "Setting" button, enter the password "szddz" into the
user settings interface, set the interface as follows based on actual field conditions.
Click the “Set”button and exit.
2) Monitor
After setting the software the user can monitoring the inverter. The right side of the main
interface is the detailed information of inverter.
3) Detailed information
Detailed setting method and other functions refer to "PV Inverter COM Manual." in
the CD.
6. Trouble shooting
In most situations, the Inverter requires very little service. However, if Inverter is not
able to work perfectly, please refer to the following instructions before calling your
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local dealer.
Should any problems arise, the red (Fault) LED on the front panel turns on and the
LCD displays the relevant information. Please refer to the following table for a list
of potential problems and their solutions.
System
Fault
Ground I
Fault
1. The ground current is too high.
2. Unplug the inputs from the PV generator and check the
peripheral AC system.
3. After the cause is cleared, re-plug the PV panel and check
PV-Inverter status.
4. If the problem persists please call service.
Grid Fault
1. Wait for 5 minutes, if the grid returns to normal, PV-Inverter
automatically restarts.
2. Make sure grid voltage and frequency meet the specifications
3. If the problem persists please call service.
Disconnect
Grid
1. Grid is not connected.
2. Check grid connection cables.
3. Check grid usability.
Inverter
Failure
PV over
Voltage
1. Check the open PV voltage, see if it is greater than or too close
to 550VDC.
2. If PV voltage is less than 550VDC, and the problem still occurs,
please call local service.
Consistent
Fault
1. Disconnect PV (+) or PV (-) from the input, restart the
PV-Inverter.
2. If it does not work, call service.
If there is no display on the panel, please check PV-input connections. If the
voltage is higher than 150V, call your local service.
During periods of little or no sunlight, the PV-Inverter may continuously start up
and shut down. This is due to insufficient power generated to operate the control
circuits.
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7. Specifications
Model
Specifications
CMS 4000
CMS 5000
Input data
Max. DC power
4500W
5200W
Max. DC voltage
550V
550V
PV voltage range MPPT
110V-530V
110V-530V
Max. input current
18A
20A
DC voltage ripple
<5%
<5%
Max. number of strings
4
4
Ground fault monitoring
yes
yes
Reverse polarity protection
short-circuit diode
short-circuit diode
Output data
Max. AC power
4400W
5000W
Nominal AC output
4000W
5000W
THD of AC current
<3%
<3%
Nominal AC voltage
230V
230V
Nominal AC frequency
50Hz
50Hz
Power factor 1 1
Short-circuit proofing
yes
yes
Efficiency
Max. efficiency
98.00%
98.00%
Euro ETA
97.50%
97.50%
Protection rating
IP/65
IP/65
Mechanical
Width/height/depth(mm)
457/368/195
457/368/195
Weight
20.7KG
20.7KG
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