WEG CFW-11 Series User manual

Motors | Automation | Energy | Transmission & Distribution | Coatings
Frequency Inverter
CF W-11
User's Manual

07/2016
Series: CFW-11
Language: English
Document: 10000063093 / 06
Models: 6...105 A / 200...240 V
3,6...88 A / 380...480 V
FREQUENCY
INVERTER
MANUAL

2
Summary of Revisions
Versión Revision Description
- R01 First edition
- R02 General revision
- R03 Setting in Table 3.6 on page 3-30
- R04 General revision
- R05 General revision
- R06 It was added:
The Section 3.3 SAFETY STOP FUNCTION on page 3-35
Modifications of Slot 4 and Slot 5
New accessory models
Additional information on the HMI
New models of recommended fuses
General revision

Index
1 SAFETY INSTRUCTIONS.................................................................. 1-1
1.1 SAFETY WARNINGS IN THE MANUAL ......................................................... 1-1
1.2 SAFETY WARNINGS IN THE PRODUCT........................................................ 1-1
1.3 PRELIMINARY RECOMMENDATIONS........................................................... 1-2
2 GENERAL INSTRUCTIONS .............................................................. 2-1
2.1 ABOUT THE MANUAL ................................................................................. 2-1
2.2 TERMS AND DEFINITIONS .......................................................................... 2-2
2.3 ABOUT THE CFW-11 ................................................................................... 2-5
2.4 IDENTIFICATION LABELS FOR THE CFW-11 ................................................ 2-8
2.5 RECEIVING AND STORAGE ....................................................................... 2-10
3 INSTALLATION AND CONNECTION............................................... 3-1
3.1 MECHANICAL INSTALLATION ..................................................................... 3-1
3.1.1 Installation Environment .................................................................... 3-1
3.1.2 Mounting Considerations ................................................................... 3-2
3.1.3 Cabinet Mounting .............................................................................. 3-5
3.1.4 Access to the Control and Power Terminal Strips ................................ 3-6
3.1.5 HMI Installation at the Cabinet Door or Command Panel
(Remote HMI) .............................................................................................. 3-9
3.2 ELECTRICAL INSTALLATION ........................................................................ 3-9
3.2.1 Identification of the Power and Grounding Terminals....................... 3-10
3.2.2 Power/Grounding Wiring and Fuses ................................................ 3-12
3.2.3 Power Connections........................................................................... 3-16
3.2.3.1 Input Connections .............................................................. 3-17
3.2.3.1.1 Power Supply Capacity ....................................... 3-18
3.2.3.1.2 IT Networks ......................................................... 3-19
3.2.3.2 Dynamic Braking ................................................................ 3-21
3.2.3.2.1 Sizing the Braking Resistor .................................. 3-21
3.2.3.2.2 Installation of the Braking Resistor ...................... 3-22
3.2.3.3 Output Connections............................................................ 3-24
3.2.4 Grounding Connections ................................................................... 3-26
3.2.5 Control Connections......................................................................... 3-28
3.2.6 Typical Control Connections ............................................................. 3-32
3.3 SAFETY STOP FUNCTION.......................................................................... 3-35
3.3.1 Installation ....................................................................................... 3-38
3.3.2 Operation ........................................................................................ 3-39
3.3.2.1 Truth Table ......................................................................... 3-39
3.3.2.2 State of Inverter, Fault and Alarm Related to Safety Stop
Function ......................................................................................... 3-39
3.3.2.3 STO Status Indication ......................................................... 3-39
3.3.2.4 Periodic Test........................................................................ 3-40
3.3.3 Examples of Wiring Diagrams of Inverter Control Signal ................. 3-41
3.3.4 Technical Specifications .................................................................... 3-42
3.3.4.1 Electrical Control Characteristics ........................................ 3-42
3.3.4.2 Operational Safety Characteristics...................................... 3-42

Index
3.4 INSTALLATION ACCORDING TO THE EUROPEAN DIRECTIVE OF
ELECTROMAGNETIC COMPATIBILITY ............................................................. 3-43
3.4.1 Conformal Installation ..................................................................... 3-43
3.4.2 Standard Definitions ........................................................................ 3-44
3.4.3 Emission and Immunity Levels.......................................................... 3-45
4 HMI ................................................................................................ 4-1
4.1 INTEGRAL KEYPAD - HMI-CFW11 ............................................................... 4-1
5 FIRST TIME POWER-UP AND START-UP ........................................... 5-1
5.1 PREPARE FOR START-UP .............................................................................. 5-1
5.2 START-UP .................................................................................................... 5-2
5.2.1 Password Setting in P0000 ................................................................. 5-3
5.2.2 Oriented Start-Up............................................................................... 5-3
5.2.3 Setting Basic Application Parameters.................................................. 5-5
5.3 SETTING DATE AND TIME ........................................................................... 5-9
5.4 BLOCKING PARAMETERS MODIFICATION................................................. 5-10
5.5 HOW TO CONNECT A PC......................................................................... 5-10
5.6 FLASH MEMORY MODULE......................................................................... 5-11
6 TROUBLESHOOTING AND MAINTENANCE .................................... 6-1
6.1 OPERATION OF THE FAULTS AND ALARMS................................................. 6-1
6.2 FAULTS, ALARMS, AND POSSIBLE CAUSES.................................................. 6-2
6.3 SOLUTIONS FOR THE MOST FREQUENT PROBLEMS ................................... 6-8
6.4 INFORMATION FOR CONTACTING TECHNICAL SUPPORT.......................... 6-8
6.5 PREVENTIVE MAINTENANCE ...................................................................... 6-9
6.5.1 Cleaning Instructions ....................................................................... 6-10
7 OPTION KITS AND ACCESSORIES .................................................. 7-1
7.1 OPTION KITS .............................................................................................. 7-1
7.1.1 RFI Filter............................................................................................. 7-1
7.1.2 24 Vdc External Control Power Supply ............................................... 7-2
7.1.3 Nema1 Degree Protection - Frame Sizes A, B and C .......................... 7-3
7.1.4 IP21 Degree Protection ...................................................................... 7-3
7.1.5 IP55 Degree Protection ...................................................................... 7-3
7.1.6 Safety Stop Function .......................................................................... 7-3
7.1.7 Switch-Disconnector on the Inverter Power Supply ............................ 7-3
7.2 ACCESSORIES ............................................................................................. 7-3
8 TECHNICAL SPECIFICATIONS......................................................... 8-1
8.1 POWER DATA .............................................................................................. 8-1
8.2 ELECTRICAL/GENERAL SPECIFICATIONS..................................................... 8-6
8.3 CODES AND STANDARDS........................................................................... 8-7
8.4 CERTIFICATIONS......................................................................................... 8-7
8.5 MECHANICAL DATA.................................................................................... 8-8
8.6 CONDUIT KIT............................................................................................ 8-15
8.7 CONDUIT KIT IP21.................................................................................... 8-16

Safety Instructions
1
CFW-11 | 1-1
1 SAFETY INSTRUCTIONS
This manual provides information for the proper installation and
operation of the CFW-11 frequency inverter.
Only trained and qualified personnel should attempt to install,
start-up, and troubleshoot this type of equipment.
1.1 SAFETY WARNINGS IN THE MANUAL
The following safety warnings are used in this manual:
DANGER!
Failure to follow the recommended procedures listed in this warning may result in death, serious
injury, and equipment damage.
DANGER!
Les procédures concernées par cet avertissement sont destinées à protéger l'utilisateur contre des
dangers mortels, des blessures et des détériorations matérielles importantes.
ATTENTION!
Failure to follow the recommended procedures listed in this warning may result in equipment damage.
NOTE!
This warning provides important information for the proper understanding and operation of the
equipment.
1.2 SAFETY WARNINGS IN THE PRODUCT
The following symbols are attached to the product and require special attention:
Indicates a high voltage warning.
Electrostatic discharge sensitive components.
Do not touch them.
Indicates that a ground (PE) must be connected securely.
Indicates that the cable shield must be grounded.
Indicates a hot surface warning.

Safety Instructions
1
1-2 | CFW-11
1.3 PRELIMINARY RECOMMENDATIONS
DANGER!
Only trained personnel, with proper qualifications, and familiar with the CFW-11 and associated
machinery shall plan and implent the installation, starting, operation, and maintenance of this
equipment.
The personnel shall follow all the safety instructions described in this manual and/or defined by the
local regulations.
Failure to comply with the safety instructions may result in death, serious injury, and equipment damage.
DANGER!
Seulement personnes avec la qualification adéquate et familiarisation avec le CFW-11 et équipements
associés doivent planifiquer ou implementer l'installation, mise en marche, operation et entretien de
cet équipement. Cettes personnes doivent suivre toutes les instructions de sécurités indiquées dans ce
manuel, et/ou définies par normes locales. L'inobservance des instructions de sécurité peut résulter
en risque de vie et/ou dommages de cet équipement.
NOTE!
For the purpose of this manual, qualified personnel are those trained and able to:
1. Install, ground, power-up, and operate the CFW-11 according to this manual and to the current
legal safety procedures.
2. Use the protection equipment according to the established regulations.
3. Provide first aid.
DANGER!
Always disconnect the main power supply before touching any electrical device associated with the
inverter.
Several components may remain charged with high voltage and/or in movement (fans), even after the
AC power supply has been disconnected or turned off.
Wait at least 10 minutes to guarantee the fully discharge of capacitors.
Always connect the equipment frame to the ground protection (PE).
DANGER!
Débranchez toujours l'alimentation principale avant d'entrer en contact avec un appareil électrique
associé au variateur. Plusieurs composants peuvent rester chargés à un potentiel électrique élevé et/
ou être en mouvement (ventilateurs), même après la déconnexion ou la coupure de l'alimentation en
courant alternatif. Attendez au moins 10 minutes que les condensateurs se déchargent complètement.
Raccordez toujours la masse de l'appareil à une terre protectrice (PE).
ATTENTION!
The electronic boards contain components sensitive to electrostatic discharges. Do not touch the
components and terminals directly. If needed, touch first the grounded metal frame or wear an
adequate ground strap.

Safety Instructions
1
CFW-11 | 1-3
Do not perform a withstand voltage test on any part of the inverter!
If needed, please, consult WEG.
NOTE!
Frequency inverters may cause interference in other electronic devices. Follow the recommendations
listed in Chapter 3 INSTALLATION AND CONNECTION on page 3-1, to minimize these effects.
NOTE!
Fully read this manual before installing or operating the inverter.
DANGER!
Crushing Hazard
In order to ensure safety in load lifting applications, electric and/or mechanical devices must be installed
outside the inverter for protection against accidental fall of load.
DANGER!
This product was not designed to be used as a safety element. Additional measures must be taken so
as to avoid material and personal damages. The product was manufactured under strict quality control,
however, if installed in systems where its failure causes risks of material or personal damages, additional
external safety devices must ensure a safety condition in case of a product failure, preventing accidents.
DANGER!
Risque d'écrasement
Afin d'assurer la sécurité dans les applications de levage de charges, les équipements électriques et/
ou mécaniques doivent être installés hors du variateur pour éviter une chute accidentelle des charges.
DANGER!
Ce produit n'est pas conçu pour être utilisé comme un élément de sécurité. Des précautions
supplémentaires doivent être prises afin d'éviter des dommages matériels ou corporels. Ce produit
a été fabriqué sous un contrôle de qualité conséquent, mais s'il est installé sur des systèmes où son
dysfonctionnement entraîne des risques de dommages matériels ou corporels, alors des dispositifs de
sécurité externes supplémentaires doivent assurer des conditions de sécurité en cas de défaillance du
produit, afin d'éviter des accidents.

Safety Instructions
1
1-4 | CFW-11

General Instructions
2
CFW-11 | 2-1
2 GENERAL INSTRUCTIONS
2.1 ABOUT THE MANUAL
The purpose of this manual is to provide you with the basic
information needed to install, start-up in the V/f control mode
(scalar), and troubleshoot the most common problems of the
CFW-11 frequency inverter series.
It is also possible to operate the CFW-11 in the following control modes: V V W, Sensorless Vector and Vector
with Encoder. For further details on the inverter operation with other control modes, refer to the programming
manual.
ATTENTION!
The operation of this equipment requires installation instructions and detailed operation provided in
the user's manual, programming manual and manuals/guides for kits and accessories.
The user's manual and the parameters quick reference are supplied in a hard copy together with
the inverter.
The user guides are also provided in a hard copy along with the kit/accessories. The other manuals
are available at www.weg.net. A printed copy of the files available on WEG’s website can be
requested at your local WEG dealer.
For information on other functions, accessories, and communication, please refer to the following manuals:
Programming manual, with a detailed description of the parameters and advanced functions of the CFW-11.
Incremental encoder interface module manual.
I/O expansion module manual.
RS-232/RS-485 serial communication manual.
CANopen slave communication manual.
Anybus-CC communication manual.
DeviceNet communication manual.
Ethercat communication manual.
Profibus DP communication manual.
Symbinet communication manual.
SoftPLC manual.

General Instructions
2
2-2 | CFW-11
2.2 TERMS AND DEFINITIONS
Normal Duty Cycle (ND): inverter duty cycle that defines the maximum continuous operation current (Inom-ND)
and the overload current (110 % for 1 minute). The ND cycle is selected by setting P0298 (Application) = 0
(Normal Duty (ND)). This duty cycle shall be used for the operation of motors that are not subjected to high
torque loads (with respect to the motor rated torque) during its operation, starting, acceleration, or deceleration.
Inom-ND:inverter rated current for use with the normal duty (ND = Normal Duty).
Overload: 1.1 x Inom-ND/ 1 minute.
Heavy Duty Cycle (HD): the duty cycle that defines the steady state current value Inom-HD and an overload of
150 % during 1 minute. It is selected by programming P0298 (Application) = 1 (Heavy Duty - HD). It must be
used for driving motors that are subject in that application to high torques with respect to their rated torque,
when operating at constant speed, during start, acceleration or deceleration.
Inom-HD:inverter rated current for use with the heavy duty (HD) cycle.
Overload: 1.5 x Inom-HD / 1 minute.
Rectier: the input circuit of the inverters that converts the input AC voltage into DC; it is made of thyristors
and power diodes.
Pre-charge Circuit: it charges the DC Link capacitors with a limited current, thus avoiding higher current peaks
when powering the inverter.
DC Link: inverter intermediate circuit; DC voltage obtained from the rectification of the AC input voltage or
from an external power supply; feeds the output inverter bridge with IGBTs.
U, V, W Arms: set of two IGBTs of the inverter output phases U, V, and W.
IGBT: insulated Gate Bipolar Transistor; basic component of the output inverter bridge. The IGBT works as an
electronic switch in the saturated (closed switch) and cut-off (open switch) modes.
Braking IGBT: works as a switch to activate the braking resistors; it is controlled by the DC Link voltage level.
Gate Driver: circuit used to turn-on and turn-off the IGBTs.
PWM: Pulse Width Modulation; pulsed voltage that feeds the motor.
Switching Frequency: Frequency of the IGBTs switching in the inverter bridge, normally expressed in kHz.
Heatsink: metal device designed to dissipate the heat generated by the power semiconductors.
PE: Protective Earth.
MOV: Metal Oxide Varistor.
RFI Filter: Radio-Frequency Interference Filter for interference reduction in the radio-frequency range.

General Instructions
2
CFW-11 | 2-3
PTC: resistor which resistance value in ohms increases proportionally to the temperature increase; used as a
temperature sensor in electrical motors.
NTC: resistor which resistance value in ohms decreases proportionally to the temperature increase; used as a
temperature sensor in power modules.
HMI: Human-Machine Interface; it is the device that allows the control of the motor, the visualization and the
modification of the inverter parameters; it's also known as keypad. The CFW-11 HMI presents keys for
commanding the motor, navigation keys and a graphic LCD display.
FLASH Memory: non-volatile memory that can be electronically written and erased.
RAM Memory: Random Access Memory (volatile).
USB: Universal Serial Bus; is a serial bus standard that allows devices to be connected using the "Plug and
Play" concept.
General Enable: when activated, this function accelerates the motor via acceleration ramp set in the inverter.
When deactivated, this function immediately blocks the PWM pulses. The general enable function may be
controlled through a digital input set to this function or via serial communication.
Start/Stop: when enabled in the inverter (Start), this function accelerates the motor via acceleration ramp up
to the speed reference. When disabled (Stop), this function decelerates the motor via deceleration ramp up to
the complete motor stop; at this point, the PWM pulses are blocked. The Start/Stop function may be controlled
through a digital input set for this function or via serial communication. The operator keys Start, and Stop
of the keypad work in a similar way.
STO: Safe Torque Off; functional safety function available as an option in CFW-11 inverter series. When STO
function is enabled the inverter guarantees that there is no movement of the motor shaft. It's also called safety
stop function in CFW-11 documentation.
PLC: Programmable Logic Controller.
TBD: value to be defined.
AC: Alternated Current.
DC: Direct Current.
Amp, A: Ampères.
°C: celsius degree.
CFM: Cubic Feet per Minute; unit of flow.
cm: centimeter.
°F: Fahrenheit degree.

General Instructions
2
2-4 | CFW-11
ft: foot.
hp: Horse Power = 746 Watts (unit of power, used to indicate the mechanical power of electrical motors).
Hz: hertz.
in: inch.
kg: kilogram = 1000 grams.
kHz: kilohertz = 1000 hertz.
l/s: liters per second.
lb: pound.
m: meter.
mA: miliampère = 0.001 Ampère.
min: minute.
mm: millimeter.
ms: millisecond = 0.001 seconds.
Nm: newton meter; unit of torque.
rms: "root mean square"; effective value.
rpm: revolutions per minute; unit of speed.
s: second.
V: volts.
Ω: ohms.
2

General Instructions
2
CFW-11 | 2-5
2.3 ABOUT THE CFW-11
The CFW-11 frequency inverter is a high performance product designed for speed and torque control of
three-phase induction motors. The main characteristic of this product is the "Vectrue" technology, which has the
following advantages:
Scalar control (V/f), V V W ("Voltage Vector WEG") or vector control programmable in the same product.
The vector control may be programmed as "sensorless" (which means standard motors without using encoders)
or as "vector control" with the use of an encoder.
The "sensorless" control allows high torque and fast response, even in very low speeds or at the starting.
The "vector with encoder" control allows high speed precision for the whole speed range (even with a standstill
motor).
"Optimal Braking" function for the vector control: allows the controlled braking of the motor, eliminating the
additional braking resistors in some applications.
"Self-Tuning" feature for vector control and VVW. It allows the automatic adjustment of the regulators and
control parameters from the identification (also automatic) of the motor parameters and load.

General Instructions
2
2-6 | CFW-11
2
Analog inputs
(AI1 and AI2)
FLASH
memory
module
MMF-03
Digital inputs
(DI1 to DI6)
Control power supply and interfaces
between power and control
USB
PC
Power
Control
Rectifier
Motor
Inverter
with IGBT
transistors
Power
supply

= DC Link connection
= Braking resistor connection

Pre-
charge
SuperDrive G2 Software
WLP Software
Capacitor
bank
RFI filter
DC-DC+
Keypad
CC11
Control
Board with
a 32 bits
"RISC"
CPU
Analog outputs
(AO1 and AO2)
Digital outputs
DO1 (RL1) to
DO3 (RL3)
Keypad
(remote)
DC Link Feedback:
- voltage
- current
PE PE
COMM 2
(anybus) (Slot 4 )
COMM 1
(Slot 3 - green)
Encoder interface
(Slot 2 - yellow)
I/O expansion
(Slot 1 - white)
Accessories
Figure 2.1 - Block diagram for the CFW-11

General Instructions
2
CFW-11 | 2-7
2
A - mounting supports
(for through the wall mounting)
B - heatsink/back of the inverter
C - top cover(does not exist in inverters with
IP55 degree protection)
D - fan with mounting support
E - COMM 2 module (anybus)
F - option board/accessory module
G - FLASH memory module MMF-03
H - front cover
I - HMI
A
B
DH
E
F
I
G
C
Figure 2.2 - Main components of the CFW-11
1
2
3
USB Connector
USB LED
Off: no USB connection
On/Flashing: USB communication is active
STATUS LED
Green: normal operation with no fault or alarm
Yellow: alarm condition
Flashing red: fault condition
1
2
3
Figure 2.3 - LEDs and USB connector

General Instructions
2
2-8 | CFW-11
2.4 IDENTIFICATION LABELS FOR THE CFW-11
There are two nameplates on the CFW-11: one complete nameplate is affixed to the side of the inverter and
a simplified one is located under the keypad. The nameplate under the keypad allows the identification of the
most important characteristics of the inverter even if they are mounted side-by-side.
Rated output data (voltage, number of
power phases, rated currents for use with
Normal Duty (ND) and Heavy Duty (HD)
cycles, overload currents for 1 min and 3 s,
and frequency range)
Rated input data (voltage, number of power pha-
ses, rated currents for use with Normal Duty (ND)
and Heavy Duty (HD) cycles, frequency)
Maximum surrounding air temperature
Current specifications for use with the
Heavy Duty (HD) cycle
Current specifications for use with the
Normal Duty (ND) cycle
Manufacturing date (day-month-year)
CFW-11 model number
Serial number
WEG part number
Inverter net weight
a) Nameplate afxed to the side of the inverter
WEG part number
Serial number
CFW-11 model number
MSCFW110070T4OFAZ
12511864
SERIAL#: 1234567890
10 L Manufacturing date
(day/month/year)
b) Nameplate located under the keypad
Figure 2.4 - (a) and (b) - Nameplates
1
2
Nameplate affixed to the
side of the heatsink
Nameplate under the keypad
2
1
Figure 2.5 - Location of the nameplates

General Instructions
2
CFW-11 | 2-9
Inverter Model Available Option Kits (Can be Installed in the Product From the Factory)
Refer to Chapter 8 TECHNICAL SPECIFICATIONS on page 8-1 for a list of models for the CFW-11 series and for a complete inverter's technical specification
Refer to Chapter 7 OPTION KITS AND ACCESSORIES on page 7-1 to check option kit availability for each inverter model
Example BR CFW-11 0016 T 4 S _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Z
Market identification (defines the manual language and the factory settings)
WEG CFW-11 frequency inverter series
Rated output current for use with the Normal Duty (ND) cycle
Number of power phases
Power supply voltage
Option kit Enclosure
type
Keypad (HMI)
Braking Disconnect
switch in inverter supply
Disconnect switch in inverter supply
(8)
Safety stop 24 Vdc
external power supply for control
Special hardware
Special software
Digit final indicator of encoding
Available options
2 characters
S = single- phase power supply T = three- phase power supply B = single or three-phase power supply
2 = 200...240 V 4 = 380...480 V
S = standard product O = product with option kit
Blank = standard (1) N1 = Nema1 (6) 21 = IP21 (7) 55 = IP55
Blank = standard (2)
IC = no keypad (blind cover)
Blank = standard (3)
Blank = standard FA = class 3 internal RFI filter
Blank = Without disconnecting switch DS = With disconnect switch
Blank = standard (Safety Stop function is not available) Y = Safety Stop according to ISO 13849-1 category 3 (4) (5)
Blank = standard (not available) W = 24 Vdc external power supply for control
Blank = standard H1 = Special hardware n° 1
Blank = standard S1 = Special software n° 1
HOW TO CODIFY THE CFW-11 MODEL (SMART CODE)
(1) Degree of protection standard frame sizes A, B and C: IP21; frame size D: IP20/Nema1. (2) Standard HMI CFW-11. (3) Braking transistor (IGBT) is incorporated in all models of frame sizes A, B, C and D as standard. (4) Refer to Section 3.3 SAFETY STOP FUNCTION on page 3-35 for further information.
(5) It is not possible to specify simultaneously optional items Nema1 and safety stop function for inverters of frame size A. (6) This option is not valid for inverters of frame size D since the standard degree of protection is already Nema1. (7) Only applicable for inverters of frame size D. (8) It is only possible to specify the optional item with switch-disconnector for inverters with degree of protection IP55.

General Instructions
2
2-10 | CFW-11
2.5 RECEIVING AND STORAGE
The CFW-11 is packaged and shipped in a cardboard box until the models of frame size C. The bigger frame
models are packaged and shipped in a wood crate.
There is an identification label affixed to the outside of the package, identical to the one affixed to the side of
the inverter CFW-11.
Follow the instructions below to remove the CFW-11 models above frame size C from the package:
1. Put the shipping container over a flat and stable area with the assistance of another two people.
2. Open the wood crate.
3. Remove all the packing material (the cardboard or styrofoam protection) before removing the inverter.
Verify whether:
1. The CFW-11 nameplate corresponds to the purchased model.
2. Any damage occurred during transportation.
Report any damage immediately to the carrier that delivered your CFW-11 inverter.
If the CFW-11 is not installed soon, store it in a clean and dry location (temperature between -25 °C and 60 °C
(-13 °F and 140 °F), with a cover to prevent dust accumulation inside it.
ATTENTION!
When the inverter is stored for a long period, it becomes necessary to perform the capacitor reforming.
Refer to the procedure in the Section 6.5 PREVENTIVE MAINTENANCE on page 6-9 in the Table
6.3 on page 6-9.

Installation and Connection
3
CFW-11 | 3-1
3 INSTALLATION AND CONNECTION
This chapter provides information on installing and wiring the CFW-11.
The instructions and guidelines listed in this manual shall be followed
to guarantee personnel and equipment safety, as well as the proper
operation of the inverter.
3.1 MECHANICAL INSTALLATION
3.1.1 Installation Environment
NOTE!
The inverter are designed for indoor use only.
Avoid:
Direct exposure to sunlight, rain, high humidity, or sea-air.
Inflammable or corrosive gases or liquids.
Excessive vibration.
Dust, metallic particles, and oil mist.
Environment conditions for the operation of the inverter:
Temperature of CFW-11 inverters with degree of protection IP2X or Nema1: from -10 ºC to 50 ºC (104 °F to
122 °F) - rated conditions (measured around the inverter).
Temperature of CFW-11 inverter with degree of protection IP55: from -10 ºC to 40 ºC (50 °F to 104 °F)
- rated conditions (measured around the inverter).
Current derating according to the ambient temperature:
CFW-11 inverters with degree of protection IP2X or Nema1: from 50 ºC to 60 ºC (122 °F to 140 °F) -
current derating of 2 % for each degree Celsius above 50 ºC (122 °F).
CFW-11 inverters with degree of protection IP55: from 40 ºC to 50 ºC (104 °F to 122 °F) - current derating
of 2 % for each degree Celsius above 40 ºC (104 °F).
Humidity: from 5 % to 95 % non-condensing.
Maximum altitude: up to 1000 m (3,300 ft) - rated conditions.
From 1000 m to 4000 m (3,300 ft to 13,200 ft) - 1 % of current derating for each 100 m (330 ft) above
1000 m (3,300 ft) altitude. From 2000 m to 4000 m (6,600 ft to 13,200 ft) - maximum voltage (240 V for
models 220...240 V and 480 V for models 380...480 V) derating of 1.1 % for each 100 m (330 ft) above
2000 m (6,600 ft).