
It is very important to check if the
inverter software version is the

Addition of the CFW10 MECII and
addition of the EMC filter for MECI.
Addition of the CFW10 Size III and
Addition of the EMC filter for
Inclusion of the three-phase and
Cold Plate models, and the
models with Built-in filter.
The table belowdescribesall revisions madeto this manual.

CONTENTS
Quick Parameter Reference,
Fault and Status Messages
...............................................................
........................................................
........................................................
Safety Notices in the Manual
.....................................
Safety Notice on The Product
...................................
PreliminaryRecommendations
.................................
......................................................
.......................................................
....................................................
...............................................
...............................................
Installation and Connection
..............................................
........................................................
.....................................
........................................
..........................................
.......................................
..................................................
Power and Grounding Terminals
.........................
3.2.2 Location of the Power, Grounding and Control
........................................................
Wiring and Fuses for Power and Grounding
.............................................
..................................
.....................................
.............................
Signal and Control Connections
.........................
Typical Terminal Connections
..............................
European EMC Directive - Requirements for
............................................
...........................................................

3.3.2 Specification of the Emission and
...................................................
...............................................
3.3.4 Characteristics of the EMC Filters
.........................................
...........................................
.....................................
Inverter Status - HMI Display
...............................
4.2.3 Read-Only Variables
...........................................
Parameter Viewing and Programming
....................................................
..........................................................
...................................................................
5.3.1 Start-up Operation via Keypad (HMI)
5.3.2 Start-up Operation via Terminals
.........................
Detailed Parameter Description
...................................................................
................................................................
............................................
FrequencyReference Sources
...........................
.........................................................
Local/Remote Operation Modes
.........................
.....................................................
Access and Read Only Parameters -
......................................................
6.3.2 Regulation Parameters - P100 to P199
6.3.3 Configuration Parameters - P200 to P398
Special Functions Parameters - P500 to P599
.................................................
................................................
............................................

Diagnostics and Troubleshooting
7.1 Faults and Possible Causes
.....................................
.........................................................
.......................................................
7.4 Preventive Maintenance
............................................
7.4.1 Cleaning Instructions
.........................................
................................................................
............................................................
8.2.1 Application Criteria
...........................................
..........................................................
..................................................
................................................................
..........................................................
.............................................................
9.1.1 Power Supply: 200/240 V - Single-phase
9.1.2 Power Supply: 200/240 V - Three-phase
9.1.3 Power Supply: 110-127 V - Single-phase
9.2 Electronic/General Data
..........................................

QUICK PARAMETER REFERENCE
QUICK PARAMETER REFERENCE, FAULTAND STATUS MESSAGES
I. Parameters
Fequency Proportional Value
Keypad FrequencyReference

QUICK PARAMETER REFERENCE
(AutomaticIxR Compensation)
DC Link Voltage Regulation
Actuation Level of the Voltage
Regulation at the DC Link
Special Functions Selection
Starting Point of the Switching
-74Selection – Local Mode
Speed Reference Selection -

QUICK PARAMETER REFERENCE
0 = (0 to 10) V/ (0 to20) mA
Input Gain(HMI Potentiometer)
InputOffset(HMIPotentiometer)
Analog Input (AI1) Filter
20 = Without ExternalFault
Relay Output RL1 Function

QUICK PARAMETER REFERENCE
DC Braking Start Frequency
SPECIAL FUNCTION - P500 to P599
PID Regulator Action Type
Automatic Setting of P525
This parameter can be changed only with the inverter disabled (stopped motor).
ThisParameter cannot bechanged when theroutine "load factorydefault"is excuted(P204=5).
6 % for the 15.2 A model.
2.5 kHz for the 15.2 A model.
Output Overcurrent/Short-Circuit
Output Overload (I x t function)
Program MemoryError (checksum)
Keypad (HMI) Communication Fault
II. Fault Messages
III.Other Messages
Inverter is ready to be enabled
Power supplyvoltage is too low for the inverter
Inverterin DC braking mode
Inverter is loading factory setting

SAFETYNOTICES
This manual contains necessary information for the correct use of the
CFW-10 Variable FrequencyDrive.
This manual has been written for qualified personnel with suitable
training and technical qualification to operatethis type of equipment.
The following SafetyNotices will be used in this manual:
If the recommended Safety Notices are not strictly observed, it can
lead to serious or fatal injuries of personnel and/or material damage.
Failure to observe the recommended SafetyProcedures can lead to
The content of this manual supplies important information for the
correct understanding of operation and proper performance of the
The following symbols may be attached to the product, serving as
Components sensitive to electrostatic discharge. Do not touch
them without proper grounding procedures.
Mandatory connection to ground protection (PE)
Shield connection to ground
Only qualified personnel should plan or implement the installation,
start-up, operation and maintenance of this equipment. Personnel
must review entire Manual before attempting to install, operate or
These personnel must follow all safety instructions included in this
Manual and/or defined bylocal regulations.
Failure to complywith these instructions may resultin personnelinjury

CHAPTER 1 - SAFETY NOTICES
In this manual, qualified personnel are defined as people that are
Install, ground, power up and operate the CFW-10 according to
this manual and the local required safetyprocedures;
Use of safety equipment according to the local regulations;
The inverter control circuit (CCP10, DSP) and the HMI-CFW-10 are
not grounded. They are high voltage circuits.
Always disconnect the supply voltage before touching any electrical
component inside the inverter.
Many components are charged with high voltages, even after the
incoming AC power supply has been disconnected or switched OFF.
Waitat least10minutes for the total discharge of the powercapacitors.
Always connect the frame of the equipment to the ground (PE) at the
suitable connection point.
CFW-10 drive must be grounded appropriately for safety purposes
All electronic boards have compon ents that are sensitive to
electrostatic discharges. Never touchanyoftheelectricalcomponents
or connectors without following proper grounding procedures. If
necessary to do so, touch the properly grounded metallic frame or
use a suitable ground strap.
Inverters can interfere with other electronic equipment. In order to
reduce this interference, adopt the measures recommended in
Section 3 “Installation”.
Read this entire manual carefully and completely before installing or
Do not apply High Voltage (High Pot) Test on the inverter!
If this test is necessary, contact the Manufacturer.

This chapter defines the contents and purposes of this manual and
describesthe main characteristicsof the CFW-10 frequency inverter.
Identification,receiving inspections and storage requirements are also
This Manual is divided into 9 Chapter, providing information to the
user on receiving,installation, start-up and operation:
General Informationsand Receiving the CFW-10.
CFW-10 and RFI Filters - Mechanical and Electrical
Installation (power and control circuitry).
Using the Keypad (Human Machine Interface - HMI).
Start-up - Steps tofollow.
Setupand Read-only Parameters-Detailed description.
Solving problems,cleaning instructions and preventive
CFW-10 Optional Devices - Description, technical
characteristics and installation.
CFW-10 ratings -Tables and technical information.
This Manual provides information for the correct use of the CFW-10.
The CFW-10 is veryflexibleandallows the operation in manydifferent
modes as described in this manual.
As the CFW-10 can be applied in several ways, it is impossible to
describe here all of the application possibilities. WEG does not accept
any responsibility when the CFW-10 is not used according to this
No part of this Manual may be reproduced in any form, without the
written permission of WEG.
It is important to note the Software Version installed in the CFW-10,
since it defines the functions and theprogramming parameters of the
This manual refers to the software version indicated on the inside
cover. For example, the Version1.0Xappliesto versions1.00 to 1.09,
where “X”is a variablethat will change due to minor softwarerevisions.
The Software Version can be read in the Parameter P023.
GENERALINFORMATION

The CFW-10 frequency inverter is fitted with the V/F (scalar) control
The V/F (scalar) mode is recommended for more simple applications
suchaspumpandfandrives.Inthese casesonecanreduce themotor
and inverter losses by using the "Quadratic V/F" option, that results in
The V/F mode is also used when more than one motor should be
driven simultaneously by one inverter (multimotor application).
Chapter 9 shows the different power lines and additional technical
The block diagram below gives a general overviewof theCFW-10.
- CFW-10 Block Diagram for models 1.6 A, 2.6 A and 4.0 A / 200-240 V (single-phase)
and 1.6 A, 2.6 A, 4.0 A and 7.3 A/200-240 V (three-phase)

- CFW-10 Block Diagram for model 7.3 A and 10.0 A/200-240 V (single-phase)
and 10.0 A and 15.2 A/200-240 V (three-phase)

- CFW-10 Block Diagram for model 1.6 A and 2.6 A/110-127 V

- CFW-10 Block Diagram for model 4.0 A /110-127 V
BETWEEN POWER AND CONTROL

CFW-10 IDENTIFICATION
- Description and Location of the Nameplate

The Option field (S or O) defines if the CFW-10 is a standard version or if itwill be equipped with anyoptional devices.
If the standard version is required, the specification code ends here.
The model number has always the letter Z at the end. For example:
CFW100040S2024ESZ = standard 4.0 A CFW-10 inverter, single-phase at 200 V to 240 V input with manual in
If the CFW-10 is equipped with any optional devices, you must fill out all fields in the correct sequence up to the last
optional device, the model number is completed with the letterZ.
HOW TO SPECIFY THE CFW-10 MODEL

The CFW-10 is supplied in cardboard boxes.
Thereis a nameplateon the outside of the packingbox thatisidentical
to that one on theCFW-10.
CFW-10 nameplate data matches with your purchase order.
The equipment has not been damaged during transport.
If any problem is detected, contact the carrier immediately.
If the CFW-10 is not installed immediately, store it in a clean and dry
room (storage temperatures between -25 °C and 60 °C). Cover it to
protect it against dust, dirtor other contamination.
When stored for a long time, it is recommended to power up and
keepthedrive runningfor1 hour everyyear. Make suretousea single-
phasepower supply(50 or 60 Hz) that matchesthedrive ratingwithout
connectingthe motor to its output.Afterpowering up thedrive, keep it
off for 24 hours before using it again.

INSTALLATIONAND CONNECTION
Environment
This chapter describes the procedures for the electrical and
mechanical installation of the CFW-10.
These guidelines and suggestions must be followed for proper
The location of the inverter installation is an importantfactor to assure
good performanceand high product reliability. For proper installation,
we make the following recommendations:
Avoid direct exposure to sunlight,rain, high moisture and sea air.
Avoid exposure to gases or explosive or corrosive liquids;
Avoid exposure to excessive vibration, dust, oil or any conductive
Environmental Conditions:
Temperature : 0 ºC to50 ºC (32 ºF to 122 ºF) - nominal conditions,
except for the 15.2 A model with Built-in filter (0 to 40 °C).
Relative Air Humidity: 5 % to 90 % -non-condensing.
MaximumAltitude: 1000 m (3.300 ft) - nominal conditions.
From 1000 m to 4000 m (3.300 ft to 13.200 ft): with 1 % current
derating for each 100 m (330 ft) above 1000 m (3.300 ft).
Pollution Degree: 2 (according to EN50178 and UL508C).
External dimensions and mounting holes for the CFW-10 shall be
according to figure 3.1 and table 3.1.
- Dimensional of CFW-10 - Sizes 1, 2 and 3

INSTALLATION AND CONNECTION
- Dimensional of CFW-10 - Sizes 1, 2 and 3
Installation data (dimensions in mm (in)) – Refer to Section 9.1

INSTALLATION AND CONNECTION
Cold Plate Version, installation data (dimensions in mm (in)) – Refer to Section 9.1
The Cold Plate version was designed in order to allow mounting the
“CP”CFW-10frequencyinverter in any heatdissipation surface,since
followingrecommendations are fulfilled.
INSTALLATING THE FREQUENCY INVERTER ON THE HEAT
DISSIPATION SURFACE - STEPS
Mark out the positions of the mounting holes on the backing plate
where the frequency inverter will be located (see in figure 3.1
The surface that is in contact with frequency inverter dissipation
surface must be free of dirt and burr. Standard requirements are:
the backing plate flatness (considering an area of 100 mm
m and the roughness less than

INSTALLATION AND CONNECTION
Figure 3.2 and table 3.2 show free space requirements to be left
Installthe drive on a verticalposition, following the recommendations
Install the drive on a flat surface.
Do not install heat sensitive components immediately above the
When there are other devices installed at thetop and at thebottomof
the drive, respect the minimum recommended distance (A + B) and
deflect the hot air coming from the device below.
Provide independent conduits for signal , control and power
conductors.(Refer to Electrical Installation).Separate the motorcables
Use (M4) mounting screws in order tofasten the frequency inver-
After drilling the holes, clean the contact surface of the backing
plate and coat it with a thin thermal paste layer, or with a heat
conducting foil or similar product (approx. 100
m).5.Continue the mechanical installation as indicated in Chapter3.1.
Electrical installation shall be performed as indicated in the
After operation, check P008. This parametermust not exceed 90 ºC.

INSTALLATION AND CONNECTION
When drives are installed inside panels or inside closed metallic
proper cooling is required to ensure that the temperature
aroundthedrive willnot exceedthemaximumallowable temperature.
Refer to Section 9.1 for Power Dissipation data.
Figure 3.3 shows the installation procedure of the CFW-10 on a
- Mounting Procedures for the CFW-10
ELECTRICAL INSTALLATION
The information below will be a guide to achieve a proper installation.
Follow also all applicable local standards for electrical installations.
Be sure the AC input power has been disconnected before making
The CFW-10 shall not be used as an emergency stop device. Use
additional devices proper for this purpose.
- Free space requirements

INSTALLATION AND CONNECTION
a) Models 1.6 A, 2.6 A and 4.0 A/200-240 V and1.6Aand 2.6 A/110-127 V (single-phase)
b) Models 7.3 A and 10 A/200-240 V and 4.0 A/110-127 V (single-phase)
L/L1 N/L2 BR + UD U V W PE
c) Models 1.6 A, 2.6 A, 4.0 A, 7.3 A/200-240 V (three-phase)
d) Models 10.0 A and 15.2A/200-240 V (three-phase)
Description of the Power Terminals:
L/L1, N/L2, L3: AC power supply.
U, V and W: Motor connection.
PE: Grounding connection.
BR: Connection terminal for the braking resistor. Not available for
1.6 A, 2.6 A and 4 A/200-240 V and1.6 A and 2.6 A/110-127 V and
7.3 A/200-240 V three-phase models.
+UD: Positive connection terminal (DC Link). This terminal is used
to connect the braking resistor (connect also the BR terminal). Not
available for 1.6A, 2.6 A and 4.0 A/200-240 V and 1.6 A and 2.6A/
110-127 V and 7.3A/200-240 V three-phase models.

INSTALLATION AND CONNECTION
Provide at least 0.25 m (10 in) spacing between low voltage wiring
and drive/motor cables. For instance:PLC’s, temperature monitoring
devices, thermocouples, etc.
Table 3.3 presents minimum cable diameter and circuit breakerrating
for the CFW-10. Tightening torque shall be as indicated in table 3.4.
All power wiring (cooper) shall be rated for 70 ºC minimum.
- Recommended wire cross-section and circuit-breakers - use (70 ºC) copper
- Location of the Power and Control Connections

INSTALLATION AND CONNECTION
Cable dimensions indicated in table 3.3 are reference values only.
Installation conditions and the maximum acceptableline voltage drop
shall be considered when sizing the power cables.
- Recommended tightening torques for power connections
a) Models 1.6 A, 2.6 A and 4.0 A/200-240 V and 1.6 A and 2.6 A/110-127 V (single-phase)
Power Connections
- Groundingand power supply connections

INSTALLATION AND CONNECTION
b) Models 7.3 Ato 10 A/200-240 V and 4.0A/110-127 V (single-phase)
c) Models 1.6A, 2.6 A, 4.0 A and 7.3A/200-240 V (three-phase)
- Grounding and power supply connections

INSTALLATION AND CONNECTION
- Grounding and power supply connections
d) Models 10.0 A and 15.2A/200-240 V (three-phase)
Use a disconnecting device at the driveAC-input power supply. This
device shall be capable of disconnecting the drive from the power
supply when necessary (for maintenance purposes, for instance).
The drive AC-input power supply shall have a grounded neutral
The AC-input voltage shall matchthe drive rated voltage.
The CFW-10 is capable ofwithstanding up to 30.000 symmetrical
rms Amperes at 127 V/240 V.
If the CFW-10 is installed in networks with higher symmetrical rms
currents (> 30.000 Amps), an appropriate protection mean shall
be provided (fuses or circuit breaker).
The use of line reactors is dependent upon several factors. Refer to
Chapter 8.2 in order to understand these requirements.
Capacitors for power factor correction are not required at the input
(L/L1, N/L2, L3) and shall not be connected at the output (U, V, W).

INSTALLATION AND CONNECTION
For the drives with the rheostatic braking optional,the brakingresistor
shall be installed externally. Refer to figure 8.4 for correct braking
resistor installation. Size the braking resistor according to the
application and respecting the maximum admissible current for the
Use twisted pair to connect the braking resistor to the drive. Run this
cable separately from the signal and control cables. If the braking
resistor is installed inside the drive panel, the additional resistor heat
dissipation shall be considered when defining the panel ventilation.
The drive must be grounded for safetypurposes (PE).
The ground connection must comply with the local regulations. For
grounding purposes, use cables with cross sections as indicated in
table 3.3. Make the ground connection to a grounding bar or to the
general grounding point (resistance
The grounding wiring shall be installedaway fromequipment operating
with high currents (forinstance:high voltage motors, welding machines,
If several drives are used together,refer to figure 3.7.
The drive has electronic protection against motor overload. This
protectionshall be set according to the specific motor. Whenthesame
drive is connected to several motors, individual overload relays shall
be used for each motor protection.
If a disconnecting switch or a contactor is inserted between the drive
output andthe motor input,donotoperate them when motor is running
or when driveis enabled. Maintaintheelectrical continuity of the motor

INSTALLATION AND CONNECTION
Do not use the neutral conductor for groundingpurposes.
The AC input for the drive supply must have a grounded neutral
Electromagnetic Interference
Shieldedcable or metallic conduitshall be used for motor wiring when
electromagnetic interference (EMI) caused by the drive interferes in
the performance of otherequipment. Connectone endof the shielding
to the drive grounding point and the other end to the motor frame.
Always ground the motor frame. Ground the motor in the panel where
the drive is installed or ground it to the drive. The drive output wiring
mustbe laid separatelyfrom the input wiring as well as from the control
- Grounding connections for more than one drive

INSTALLATION AND CONNECTION
The signal (analog input) and control connections (digital inputs and
relay output) are made on the XC1 connector of control board (see
- Description of the XC1 terminal of the control board
DI12DI23DI34DI45GND6AI17GND8AI19+10 V10NC11Common
General Enable (remote mode)
FrequencyReference (remote)
Relay Output - common point
4 isolated digital inputs
Minimum High Level: 10 Vdc
Maximum High Level: 30 Vdc
Input current: -11 mA @ 0 Vdc
Max. input current: -20 mA
Not interconnected with PE
Current:(0 to 20) mA or (4to 20)mA
Not interconnected with PE
Max. input voltage: 30 Vdc
+10 Vdc, ± 5 %, capacity: 2 mA
If the input current from (4 to 20) mA is used as standard, do not
forget to set the Parameter P235 which defines the signal type at
The analog input AI1 and the Relay output, (XC1:6…12) are
not available on Clean version of the CFW-10.
Not available on Clean version

INSTALLATION AND CONNECTION
4) For wiring distances longer than 50 m (150 ft), the use of
galvanic isolators is required for the XC1:6to XC1:9 analog signals.
Relays, contactors, solenoids or eletromagnetic braking coils
installed near inverters can eventually generate interferences
in the control circuit. To eliminate this interference, connect RC
suppressor in parallel with the coils of AC relays. Connect
free-wheeling diode in case of DC relays.
6) When analog reference (AI1) is used and the frequency
oscillates (problem caused by electromagnetic interference)
connect XC1:7 to the inverter grounding bar
During the signal andcontrol wire installation note the following:
1) Cable cross section: (0.5 to 1.5) mm² / (20 to 14)AWG.
2) Max. Torque:0.50 N.m (4.50lbf.in).
XC1 wiring must be connected with shielded cables and
minimum separately from other
wiring (power, control at 110/220
minimum for total lengths over
If the crossing of these cables is unavoida ble, i nstall them
perpendicular, maintainin g a mimim um separation distance
in) at the crossing po int.
Connect the shield as shown below:

INSTALLATION AND CONNECTION
factory default programming
, it is posible to operate the
with the minimum connectionsshown in figure
3.6 (Power) and without control connections. This operation mode is
recommended for users who are operating the inverter for the first
time as initial learning about equipment. Note that anyconnection is
needed on control terminal.
Forstart-up accordingtothis operationmode, refer to Chapter
Command enabling viaterminals.
- Wiring for Connection 2
DI1 - No Function (HMI) or
GeneralEnabling (Terminals)
+10 VNCCommonNODI4 - No Function (HMI) or
Thefrequencyreference can besentvia AI1 analog input(as shown
in figure above), via keypad HMI-CFW10, or via any other source
(see description of Parameters P221 and P222).
When a line fault occurs by using thistype of connection with switch
S3 at position "RUN", the motor will be enabled automatically as
soon as the line is re-established.
Function 2 configuration is not possible on CFW-10 Clean version.
S2S3Not available on Clean version

INSTALLATION AND CONNECTION
- Wiring for Connection 3
andS2are push buttons, NO and NC
The speed reference can be realized via Analog Input AI1 (as in
connection 2), via keypad (HMI-CFW10), or via any other source
(See description of parameters P221 and P222).
When a line fault occurs by using this connection with the motor
running and the S1 and S2 switches are in original position (S1
openned and S2 closed), the inverter will not be enabled
automatically as soon as the line is re-restablished.
The drive will be enabled only when S1switch is closed. (Pulse on
the “Start” digital input).
The Start/Stop function is described in Chapter 6.
+10 VdcNCCommonNODI4 - Forward/Reverse
Start/Stop function enabling (three-wire control):
Set DI1 to Start: P263 = 13
Set DI2 to Stop: P264 = 14
Set P229 = 1 (commands viaterminals) if you want the 3-wire control
Set P230 = 1 (commands viaterminals) if you want the 3-wire control
Program P265 = 5 (DI3) or P266 = 5 (DI4), according to the selected
0, the direction of rotation is always FWD.

INSTALLATION AND CONNECTION
Enabling of the FWD/REV function:
Set DI1 to Forward Run : P263 = 9
Set DI2 to Reverse Run: P264 = 10
Make sure the inverter commands are via terminals, i.e., set
The speed reference can be realized via Analog Input AI1 (as in
connection 2), via keypad (HMI), or via any other source (see
description of parameters P221 and P222).
When aline fault occurs in this connection mode with switch S1 or
switch S2 is closed, the motor will be enabled automatically as
soon as the line is re-restablished.
- Wiring for Connection 4
The CFW-10 inverter series was designed considering all safety and
EMC (ElectroMagnetic Compatibility) aspects.
The CFW-10 units do not have an intrinsic function until connected
with other components(e. g. a motor). Therefore, the basic product is
not CE marked for compliance with the EMC Directive. The end user
takes personal responsibility for the EMC compliance of the whole
in stal lation. H owever, when i nsta lled ac co rd ing t o th e
recommendations described in theproduct manual and including the
recommended filters and EMC measures the CFW-10 fulfill all
requirements of the (EMC Directive 89/336/EEC) as defined by the
EN61800-3 "EMC Product Standard for Adjustable Speed
Electrical Power Drive Systems -
specific standard for variable
The conformity of the complete CFW-10 series is based on tests
performed on sample models. ATechnical Construction File (TCF)
was prepared, checked and approved by a Competent Body.

INSTALLATION AND CONNECTION
Figure 3.13 below shows the EMC filters connection.
Installation
- EMC filter connection - general condition
The following items are required in order to have an appropriated
The motor cable shall be armored, or installed inside a metallic
conduitor trunking with equivalent attenuation.Ground the screen/
metallic conduit at both ends (inverter and motor).
Control (I/O) and signal wiring shall be shielded or installed inside
a metallic conduitortrunking with equivalentattenuation.as possible.
The inverter and the external filter shall be closely mounted on a
common metallic back plate. Ensure a good electrical connection
between the inverter heatsink, the filter frame and the back plate.
The wiring betweenthe filter and the inverter shall be kept as short.
The cable shield (motor and control) shall be solidly connected to
the common back plate, using metallic brackets.
Grounding shall be performedasrecommended in this user’sguide.
Use short and thick cables to ground the external filter or inverter.
When an external filter is used, ground only the filter (input) - the
inverter ground connection is performed through the metallic back
Ground the back plate using a braid, as short as possible. Flat
conductors(e.g.braids or brackets) have lower impedance at high
Use cable glands whenever possible.
Controling and signal wiring
Metalic cabinet when necessary

INSTALLATION AND CONNECTION
Conducted emissions (mains
terminal disturbance voltage - freq
Radiated emissions (electromagnetic
radiation disturba nce - freq band
Electrostatic discharge (ESD)
Conducted radio-frequency
Radio-frequency electromagnetic field
, restricted distribution
, restricted distribution
, unrestricted distribution
It depends on the drive model and on the motor
cable length (Refer to table 3.5.2).
, restricted distribution
4 kV/2.5 k Hz (capacitive clamp) input cable; 2 kV/
5 kHz control cables; 2 kV/5 kHz (capacitive
control and remoteKeypad cable
s;1 kV coupling line to line;
2 kV coupling line to earth
80 to 1000 MHz; 10 V/m; 80 % AM (1 kHz)
"First environment": environment that includes domestic
premises. It also includes establishments directly connected
without intermediate transformers to a low-voltage powersupply
network which supplies buildings used for domestic purposes.
"Secondenvironment": environment thatincludesall establishments
other than thosedirectlyconnected to alow-voltage power supply
network which supplies buildings used forindustrial purposes.
Unrestricteddistribution:mode of sales distribution in which the
supply of equipment is not dependenton the EMC competence
of the customer or user forthe application of drives.
Restricted distribution: mode of sales distribution in which the
manufacturer restricts the supply of equipment to suppliers,
customers or users who separately or jointly have technical
competenceinthe EMC requirements of the application of drives.
(source: these definitions were extracted from the product
standard IEC/EN61800-3 (1996) + A11 (2000))

INSTALLATION AND CONNECTION
Table 3.5.2 shows the inverter models, its respective EMC filter and
the EMC category classification. Refer to section 3.3.2 for EMC
category description and to secti on 3.3.4 for external filters
List of frequency drive models, EMC filters and EMC categories
For installation in residential environments with conducted
emission level Class A1 (according to table 3.5.2), please,
This is a product of restricted sales distribution class according
to the product standard IEC/EN61800-3 (1996) +A11 (2000). In
a domestic envi ronment this product may cause radio
interference in which case the user may be required to take
When installingdrivesthat meet ClassA2 for conducted emission
level, i.e. industrial environment and unrestricted distribution
(according to table 3.5.2), observe the following:
This product is specifically designed for use in industrial low-
voltage power supply networks (public networks) that not supply
residential buildings. This product may cause radio frequency
interference in a domestic environment.
Maximum motor cable length
Maximum motor cable length

INSTALLATION AND CONNECTION
Maximum switching frequency is 5 kHz.
- List of frequency drive models, EMC filters and EMC categories
The CFW -10 inverters with three-phase supply do not have EMC
Maximum motor cable length is
Maximum motor cable length is
mum motor cable length is
Maximum motor cable length is
Maximum motor cable length is
Maximum motor cable length is
Maximum motor cable length is
Maximum motor cable length is
Maximum motor cable length is
Maximum motor cable length is
Maximum motor cable length is
Maximum motor cable length is
Maximum motor cable length is
Maximum motor cable length is

INSTALLATION AND CONNECTION
Characteristics of the EMC Filters
Footprint / Booksize Model B84142A0012R212 (EPCOS)
Supply voltage: 250 V, 50/60 Hz
a) Model footprint/booksize B84142A0012R212 (EPCOS)
- Drawing of the footprint / bookside filter
Tightening torque of screw
3 x wire and sleeve DIN 46228-A2, 5-10
Figure dimensions are in mm.

INSTALLATION AND CONNECTION
- Drawing of the footprint / booksize filter
Footprint / booksize Model B84142B18R212 (EPCOS)
Supply Voltage: 250 V, 50/60 Hz
b) Footprint/booksize model B84142B18R212 (EPCOS)
Tightgning torque of screw
3 x wire and sleeve DIN 46228-A2, 5-10
Figure dimensions are in mm.

INSTALLATION AND CONNECTION
- Drawing of the footprint / booksize filter
Footprint / booksize Model B84142B22R212 (EPCOS)
Supply voltage: 250 V, 50/60 Hz
c) Footprint/booksize Model B84142B22R212 (EPCOS)
Tightgning torque of screw
Figure dimensions are in mm.

INSTALLATION AND CONNECTION
Standard Model: B84142 -A20-R
Supply voltage: 250 V, 50/60 Hz
- Drawing of the Standard Filter
a) Standard Model:B84142-A20-R (EPCOS)
Standard Model: B84142 -A30-R
Supply voltage: 250 V, 50/60 Hz
b) Standard Model:B84142-A30-R (EPCOS)
Figure dimensions are in mm.
Figure dimensions are in mm.
The declaration of conformity CE is available on the website
www.weg.net or on the CD, which comes with the products.

KEYPAD(HMI) OPERATION
This chapter describes the CFW-10 operation via Human-Machine
Interface (HMI), providing the following information:
General keypad description (HMI);
Inverter parameters arrangement;
Alteration mode parameters (programming);
Description ofthe status indicators.
The standard CFW-10 keypad has a LED display with 3 digits of 7
segments, 2 status LEDs and 4 keys. Figure 4.1 shows the front
view of the keypad and indicates the position of the Display and the
status LEDs. CFW-10Plus versionstill has a potentiometer for speed
Functions of the LED Display:
The Led Display shows the fault and status messages (see Quick
Parameter Reference, Fault and Status), the parameter number and
Functions of the LED´s “Parameter” and “Value”:
Inverterindicatesthe parameter number:
Green Led OFF and red Led ON.
Inverterindicatesthe parameter content:
Green Led ON and red Led OFF.
Increase/Decrease the speed (only available on Plus version)
available on Plus version)

CHAPTER 4 - KEYPAD (HMI) OPERATION
The Keypad (HMI) is a simple interface that allows inverter operation/
programming.This interface has the following functions:
Indication of the inverter status and operation variables;
Fault indication and diagnostics;
Viewing and programming parameters;
Inverter operation (key ) and
speed reference setting (keys and );
Potentiometer for the output frequencyvariation (only in the Plus
Basic Functions of the Keys:
Enables/disables the invertervia acceleration/deceleration ramp (run/
stop). Resets the inverter after a fault trip.
ts (commutates) the display between parametyernumber/value
Increasesthefrequency, theparameternumberorthe parametervalue.
Decreases the frequency, the parameter number or the parameter
All functions relating to the CFW-10 operation (Start/Stop, Increment/
Decrement of the Speed Frequency) can be performed through the
HMI selection. For factory default programming of the inverter, all
keypad keys are enabled. These functions can be carried out through
digital and analog inputs. Thus you must program the parameters
related to these corresponding inputs.
The command key will be enabled only when:
P229 = 0 for LOCAL Mode operation
P230 = 0 for REMOTE Mode operation
See below the keypad functions description:
When pressed, motor accelerates according to acceleration ramp
up to the speed (frequency) reference. The function issimilar tothat
performed through digital input START/STOP, when it is closed
(enabled) and maintained enabled.
When pressed again, inverteris disabled via ramp (motor accelerates
according to acceleration ramp and stops). The function is similar to
that performed through digital input START/STOP, when it is opened
(disabled) and maintained disabled.

CHAPTER 4 - KEYPAD (HMI) OPERATION
The last frequency reference, set by the keys the and
is stored when inverter is stopped or the AC power is removed,
provided P120 = 1 (reference backup active is the factory default). To
change the frequency reference before inverter is enabled, you must
change the value of the parameter P121.
Motor speed (frequency) setting: these keys are enabled for speed
The speed reference source is the keypad (P221 = 0 for LOCAL
Mode and/or P222 = 0 for REMOTE Mode);
The following parameter content is displayed: P002,P005 or P121.
Parameter P121 stores the speed reference set by these keys.
When pressed, it increases the speed (frequency) reference.
When pressed, it decreases the speed (frequency) reference.
Inverter is READY to bestarted.
Line voltage is too low for inverter operation
(undervoltage condition).
ter is in a Fault condition. Fault code is flashing
on the display. In our example we have thefault
code E02 (refer to chapter 7).
Inverter is applying a DC current on the motor (DC
according to the values programmed at
P300, P301 and P302 (refer to chapter 6).
nverteris running self-tuning routine to identify
paramet ers a utomati ca ll y. This operation is
On CFW-10Plusversion, the motor frequencysettingfunctionismade
through the HMI potentiometer.However, it is possible toset the mo-
tor frequency through the keys since P221/P222 parameters were
Besides the fault conditions, the displayalsoflashes when the inverter
is in overload condition (refer to chapter 7).

CHAPTER 4 - KEYPAD (HMI) OPERATION
All inverter settings are made through parameters.
Parametersand their contents are shown on the Display through the
LED´s " Parameter" and "Value". The identification is made between
parameter number and itsvalue.
Each parameter is associated with a numerical value (parameter
value), that corresponds to the selected option among the available
The parameter values define the inverter programming or the valueof
a variable(e.g.: current, frequency, voltage). For inverterprogramming
you should change the parameter content(s).
To allow the reprogramming of any parameter value it is required to
set P000 = 5. Otherwise you can only read the parameter values,
but not reprogram them. For more details, see P000 description in
Inverter is ready to be started
Select the desired parameter
Numerical value associated with the
Set the new desired value
Parameters from P002 to P008 are reserved for the display of read-
When the inverter is powered up, the display will indicate the value of
the Parameter P002 (output frequency value).

CHAPTER 4 - KEYPAD (HMI) OPERATION
For parameters that can be changed with the running motor ,the
inverter will use the new value immediately after it has been set.
parameters that canbe changed only with stopped motor ,the
inverter will use this new value only after the key is pressed.
By pressing the key after the reprogramming, the new
programmed value will be saved automatically in the volatile
memory and will remain stored there until a new value is
If the last programmed value in the parameter is not functionally
compatiblewith the other parameter values already programmed,
the E24 = Programming Error - will be displayed.
Example of programming error:
Programming of two digital inputs (DI) with the same function.Refer
to table 4.1 for list of programming errors that can generate an
To change any paramater value, you mustset before P000 = 5.
Otherwise you can only read the parameter values, but not
For more details, see P000 description in
If one DI has been set to JOG (P263 to P266 = 3) and no other DI has been set to General Enable or Ramp
Two or more DI(s) programmed to the same valuer (P263 to P266 = 3 to 6.9 to 26).
In one DI has been set to FWD (P263 to P266 = 9 or 11) and no other DI has been set to REV
(P263 to P266 = 10 or 12).
One DI programmed to ON (P263 to P266 = 13) and no other DI has been set to OFF (P263 to P266 = 14).
One DI programmed to Accelerate (P263 to P266 = 16 or 18) and no other DI has been set to Decelerate
(P263 to P266 = 17 or 19).
DI(s) programmed to the function FWD/REV (P263 to P266 = [9 or 11] and [10 or 12]), and simultaneously
other DI(s) have been programmed to the functions ON/OFF (P263 to P266 = 13 and 14).
Reference programmed to Multispeed (Local or Remote - P221 and/or P222 = 6) and there are no DI(s)
programmed to Multispeed (P263 to P266 = 7 or 8).
Reference programmed to EP (Local or Remote - P221 and/or P222 = 2) and there are no DI(s) programmed
to Accelerate/Decelerate EP (P263 to P266 = 16 to 19).
There is command selected to Local and/or Remote (P229 and/or P230 = 1) and there is no DI
programmed to General Enable or Ramp or FWD/REV or ON/OFF (P263 to P266 = 1, 2, 4, 13, 14, 9, 10).
The DI1 and the DI2 (P263 and P264 = 7 or 8) have been programmed simultaneously to Multispeed.
If oneDI has been programmed to accelerate EP/on (P263 to P266 = 22) and no other DI hasbeen programmed
to decelerate EP/off (P263 to P266 = 23).
Reference programmedto local or remote frequency input (P221 and/or P222 = 7)and there is no DIprogrammed
to frequency input (P263 to P266 = 26).
When the special function (PID) P203 = 1 is programmed and the reference selection is different than
- Incompatibility between Parameters - E24

This Chapter provides the following information:
How to check and prepare the inverter before power-up;
How to power-up and check for proper operation;
How to operate the inverter when it is installed according to the
typical connections (See Electrical Installation).
The inverter shall be installed according to Chapter 3 - Installation
If the drive project is different from the typical
suggested connections, follow the procedures below.
AlwaysdisconnecttheAC inputpower before making anyconnections.
Check if thepower, grounding and control connections are correct
Check all motor connections and verify if its voltage, current and
frequency match theinverter specifications.
3) Uncouple the load from the motor
If the motor can notbe uncoupled, make sure that the direction of
rotation (FWD/REV) can not cause damage to the machine.
After the inverter has been checked, AC power can be applied:
Measure the line voltage and check if it is within the specified
range (rated voltage: - 15
%).2)Power-up the AC input
Close the input circuit breaker.
Check if the power-up has been succesful
The keypad displaywill show:
While the red LED(Parameter)is ON, the green LED (Value) remains
OFF. Inverter runs some self-diagnosis routines. If no problems are
found, the display shows:
START-UP
This means that the inverter is ready (rdy = ready) to be operated.

START-UP
Even after the AC powersupply has been disconnected,highvoltages
allow full discharge of the capacitors.
The sequence below is valid for the connection 1 (refer to Section
3.2.6). Inverter must be alreadyinstalled and powered up according
to Chapter 3 and Section 5.2.
Connections according to figure 3.6.
The last frequency reference (speed) value set via the
If you wish to change this value before inverter enabling, change
parameter P121 (Keypad Reference).
If the direction of rotation of the motor is not correct, switch off
the inverter. Wait at least for 10 minutes to allow complete
capacitor discharge and then swap any two wires at the motor
If the acceleration current becomes too high, mainly at low
frequencies, set the torque boost (I x R compensation) at
Increase/decrease the contentof
gradually until you obtain
an operation with constant current over the entire frequency
For the case above, refer to Parameter Description in
If E01 fault display occurs during deceleration, increase the
Press the key and hold it
depressed until 60 Hz is reached
On Pl us versi on , vary t he
Inverter is ready to be operated
Motor accelerates from 0 Hz to 3 Hz*
(min.frequency), in the forward (CW)
Motor accelerates up to 60 Hz*
* 1800 rpm for 4 pole motor
Motor decelerates down to 0 rpm

Connections according to figures 3.6 and 3.10.
If the direction of roation of the motorrotation is notcorrect,switch
off the inverter. Wait 10 minutes to allow a complete capacitor
discharge and the swap any two wires at the motor output
If the acceleration current becomes too high, mainly at low
frequencies, set the torque boost (I x R compensation) at
.Increase/decrease the content of
obtain an operation withconstant current over the entire frequency
range. For the case above, refer to Parameter Description in
If E01 fault occurs during deceleration,increase the deceleration
Function 2 configuration is not possible on CFW -10 Clean
The sequence below is valid for the Connection 2 (refer to Section
3.2.6). Inverter must be alreadyinstalled and powered up according
to Chapter 3 and Section 5.2.
Switch S1 (FWD/REV) = Open
Switch S2 (Local/Remote) = Open
Switch S3 (Start/Stop) = Open
Potentiometer R1 (Ref.) = Positioned
totally to the left (counterclockwise)
Turn potentiometer clockwise untilthe
Inverter is ready to be operated
The commandand the reference are
commutaded to REMOTO condition
Motor accelerates from 0 Hz to 3 Hz*
(min. frequency), CW direction
* 90 rpm for 4-pole motor
The frequency reference is given by
Motor accelerates up to the the
maximum frequency (P134 = 66 Hz)
(0 Hz), reverses the direction of
accelerates up to the maximum

This chapter describes in detailallCFW-10 parametersandfunctions.
SYMBOLS
Please find below some symbols used in this chapter:
= Digital input number x.
= Frequencyreference. This is the frequencyvalue (or alternatively,
of speed) thatindicates the desired motor speed at the inverter output.
Fe= Input frequency of the acceleration and deceleration ramp.
= Maximum output frequency,defined at P134.
= Minimum output frequency, defined at P133.
Fs= Output frequency - frequency applied to the motor.
= Rated inverter output current (rms), inAmpères (A). This value
Is= Inverter output current.
Ia= Active current at inverter output, i.e., it is the component of the
total motor current proportional to active electric power absorbed by
Ud= DC link voltage in the DC link circuit.
This section describes the main concepts related to the CFW-10
This control mode is based on the constant V/F curve (P202 = 0 -
linear V/F curve). Its performance is limited at low frequencies as
function of the voltage drop in the stator resistance, that causes a
significant mag netic flow reduction in the motor air gap and
consequently reducing the motor torque. This deficiency should be
compensated by using manual and automatic boost torque (I x R
compensations), that are set manually and depend on the user
In most applications (for instance: centrifugal pumps and fans) the
setting o f thes e f unctions is enough to obtain the requi red
In V/F control, the speed regulation, that can be obtained by setting
properly slip compensation can be maintained within 1 % to 2 % of
the ratedspeed.For instance, for a IV pole motor/60 Hz, the minimum
speed variation at no load condition and at rated load can be
maintained between 18 to 36 rpm.
There is still avariation ofthe linear V/F control previously described:
The quadratic V/Fcontrol.
INTRODUCTION
DETAILED PARAMETER DESCRIPTION

CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
The frequency reference (i.e., the desired output frequency, or
alternatively, the motor speed) can be defined in several ways:
The keypad - digital reference that can be changed through the
keypad (HMI), by using the keys and (see P221, P222
Analog input - the analog input AI1 (XC1:6 to XC1:9) (see P221,
Multi-speed - up to 8 preset digital references (see P221, P222
Electronic potentiometer(EP) - another digital reference, its value
is defined by using 2 digitalinputs (DI1 and DI4) - see P221, P222,
HMI Potentiometer – the reference can be changed through the
HMI potentiometer (Only available on CFW-10 Plus version).
Figure 6.1 shows through a diagram block the frequency reference
definition to be used by the inverter.
The block diagram in figure 6.2 shows the inverter control.
This control is suitable for applications like centrifugalpumps and fan
(loads with quadratic torque xspeedcharacteristics), since it enables
a motor loss reduction, resulting in an additional energy saving by
For more details about the V/F control mode, please refer to the
description of the parameters P136, P137, P138, P142 and P145.

DETAILED PARAMETER DESCRIPTION
DIs ON (status 1) when connected to 0 V (XC1:5).
When F* < 0 one takes the module of F*and reversesthe direction
=2and if the selected control
is not forward run/reverse run.
000 00 10 10 011 1 00 101 110 11 1
ELETRONICPOTENTIOMETER (EP)
- Block diagram of the frequency reference

CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
In V/F control mode (P202= 0 or 1), Fe = F* (see Fig.6.1) if P138 = 0
(slip compensation disabled). If P138
0, see figure 6.9 for the
relation between Fe and F*.

DETAILED PARAMETER DESCRIPTION
Commands
The inverter has the following commands: PW M pulse enabling/
disabling, definition of the direction of rotation and JOG.
As the frequency reference, also the inverter commands can de
The main command sources are:
Via control terminals (XC1) - digital inputs.
The inverter enabling and disabling commands can be defined as
Start/Stop (terminals XC1 - DI(s) - see P263 to P266);
General enable (terminals XC1 - DI(s) - see P263 to P266);
Forward and Reverse (terminals XC1 – DI’(s) - see P263 to P266)
– also defines the direction of rotation;
ON/OFF (3-wire controls) (terminals XC1 - DI’(s)- see P263
The definition of the direction of rotation can be defined byusing:
Digital inputs programmed as FWD / REV, that defines both
inverter enabling or disabling and direction of rotation (see P263
Analog input - when thereferenceis viaanalog input and a negative
offset is programmed (P236 < 0), the reference may assume
negative values, thus reversing the direction of the motor rotation.
User can define two different conditions relating to the frequency
reference source and the inverter commands: these are the local and
the remote operation modes.
Figure 6.3 shows the local and remote operation modes in a block
With the factory setting in local mode the inverter can be controlledby
using the keypad, (HMI) while in remote mode all controls are via
terminals (XC1) - inverter reference and command definition.

CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
In order to simplifythe explanation, the parameters have beengrouped
by characteristics and functions:
Variables that can be viewed on the
display, but can not be changed by the
Programmable valuesthat cab be used
They define the inverter characteristics,
the functions to be executed, as well as
the input/output functions of the control
Special Function Parameters
Here are includedparameters related
This parameter can be changed only with the inverter disabled
Thisparameter is not changedwhen the load factory defaultroutine
DI1 to DI4 (P263 to P266)
- Block diagram of the Local/Remote operation mode

DETAILED PARAMETER DESCRIPTION
6.3.1 Access and Read Only Parameters - P000 to P099
Releasesthe access to change the parameter values.
The use of the password is always active.
Indicates the value of P208 x P005.
In case of different scales and units, use P208.
Indicates the inverter output current in ampères. (A).
Indicates the inverter DC Link voltage in volts (V).
Indicates the inverteroutputfrequency in hertz (Hz).
Indicatesthe inverter output voltage in volts (V).
Indicates the current power at the heatsink in Celsius
The inverter overtemperature protection (E04) acts
when heatsink temperature reaches 103 ºC.
[-]-Indicates the code of the last occured fault.
shows a list of possible faults
numbers and possible causes.
Indicates the code of the last occured fault.
shows a list of possible faults
numbers and possible causes.
Indicates the code of the last occured fault.
shows a list of possible faults
numbers and possible causes.
Indicates the software version installed in the DSP
memory located on the control board.

CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
This set of parameters defines the times to accelerate
linearly from zero up to the rated frequency and to
decelerate linearly from the rated frequency down to
The rated frequency is defined by parameter P145 .
When factory setting is used, inverter always follows
the time defined in P100 and P101.
where the accelerationand
deceleration times follow the values programmed at
Depending on the load inertia, too short acceleration
timescandisable the inverterdueto overcurrent (E00).
Depending on the load inertia, too short deceleration
times can disable the inverter due to overvoltage
(E01). For more details, refer to P151.
The ramp S reduces mechanical stress during the the
load acceleration and deceleration.
Indicates the value of the process variable used as
PID regulator feedback, in percent (%).
The PID function is only available fromV.2.00 software
The unit scale can bechanged through P528.
See detailed description of the PID regulatorin Special
Functions Parameters item.
6.3.2 Regulation Parameters - P100 to P199

DETAILED PARAMETER DESCRIPTION
It is recommended to use the S ramp with digital
frequency/speed references.
Defines if the inverter should save ornot the last used
digital reference. This backup function is only
applicable to the keypad reference (P121).
Active, but always given by P121,
independentlyof the sourcereference
- Backup configuration of digital reference
If the digital reference backup is inactive (P120 = 0),
the reference will be equal to the minimum frequency
every time the inverter is enabled, according to P133.
When P120 = 1, inverter saves automatically the di-
gital reference value, (independent of the reference
source, keypad, EP). This occurs always when inver-
ter disable is present, independent of the present
di sa ble condition (ramp o r genera l) , error or
When P120 = 2, the initial reference will be given by
P121,and saved always the inverter is enabled.
Application example: reference via EP when inverter
is disabled via digital input and decelerates EP
(coming to reference 0). However at a new enable, it
is desired that the inverter returns to a frequency
different from the minimum frequency, which will be

CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
Defines the keypad reference value that can beset by
P002 or P005 are being displayed on the HMI Display.
The keys and are enabled if P221 = 0 (in
is maintainedat the last set value, even when
inverter is disabled or turned OFF, provided P120 = 1
Defines the frequency reference (speed) for the JOG
function. The JOG function can be activated byusing
The inverter must be disabled by ramp (stopped mo-
tor) to operate in the JOG function. Thus if the control
source is via terminal, there must beat least one digi-
talinput programmed as start/stop enabling(otherwise
E24 will be displayed), which must be OFF to enable
the JOG function via digital input.(SeeP263to P266).
The rotation direction is defined by P231 parameter.
P120 = 3, works according P120 = 1, however, only
update the backup after a start when the output
frequency valuereaches the previously backup stored
Multispeed is used when the selection of up to 8 pre-
programmed speeds are required.
It allows the control of the output speed related to the
values programmed by the parametersP124 to P131,
according to the logical combination of the digital
inputs programmed to multispeed.
Activationof the multispeed function:
To ensure that the reference source is given by the
multispeed function, i.e., setting P221 = 6 for local
mode or P222 = 6 for remote mode;
To program one or more digital inputs to multispeed,
according to table below:
- Parameters setting to define multispeed

DETAILED PARAMETER DESCRIPTION
The frequency reference is defined by the statusof the
digital inputs programmed to multispeed as shownin
If a multi-speed reference (P124 to P131) is set to 0.0 Hz
and this same reference is selected, the drive will
decelerate to 0.0 Hz and will remain ready(RDY) while
The multispeed functionhas some advantages for the
stabibiltyof the fixedpreprogrammed references and
the immunity a gainst electrical noises (d igital
references and insulated digital inputs).
- Time Diagram of the multispeed function

CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
s the maximum and minimum outputfrequency
when inverter is enabled.
It is valid for any type of speed reference.
TheparameterP133 defines a deadzone whenanalog
inputs are used - see parameters P234 to P236.
P134 and the gain and offset of the analog input(s)
(P234, P236) define the scale and the range of the
speed variation via analog input. For more details see
Compensates the voltage drop due to the motor stator
It acts at low speeds by increasing the in-
verter output voltage, in order to maintain a constant
torque during the V/F operation.
The best setting is to program the lowest value for
P136 that still permits the motor start satisfactorily. If
thevalue is higher thanrequired,an inverter overcurrent
(E00 or E05)may occur due to high motor currents at
Thesetting P136=100 % correspondstothe maximum
increment of the output voltage (30% of P142).
- V/F curve and details of the manual torque boost

DETAILED PARAMETER DESCRIPTION
- V/F curve and details of the manual torque
boost (I x R compensation)
The automatic torque boost compensates for the
voltage drop in the stator resistance as a function of
the active motor current.
The criteria for setting P137 are the same as for the
Setting P137 = 100 % corresponds to the maximum
increment of the output voltage (30% of P142).
- Block diagram of the automatic
- V/F curve with automatic torque boost
(automatic I x R compensation )

CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
The parameter P138 is used in the motor slip compen-
Thisfunctioncompensates the dropofthemotor speed
due to load, which isa inherent characteristic relating
to the operation principle of the induction motor.
This speed drop is compensated by increasing the
output frequency (applied to the motor) as a function
of the increase of the active motor current, as shown
in the block diagram and in the V/F curve below.
- Block diagram of the slip compensation function
V/F curve with slip compensation
To set the parameter P138 adopt the fol lowi ng
run the motor without load up to approximately
half of the application top speed;
measure the actual motor or equipment speed;
apply rated load to equipment;

DETAILED PARAMETER DESCRIPTION
Define the V/F curveused inV/Fcontrol (P202= 0 or 1).
These parameters allow changing the standard V/F
curve defined at P202 - programmable V/F curve.
P142 sets the maximum output voltage. This value is
as a percent of the inverter supply voltage.
For inverter models 110-127 V; the output
voltage applied to the motor is doubled the
power supply voltage on the inverter input.
Parameter P145 defines the rated frequency of the
The V/F curve relates the inverter output voltage and
frequency (applied to the motor) and consequentlythe
magnetizing flux of the motor.
The programmable V/F curve can be used in special
applications where the motors used require a rated
voltage and/or frequency different than the standard
ones. Examples: motor for 220 V/300 Hz and a motor
Parameter P142 is also useful in appplications that
require rated voltage differentfrom the inverter supply
voltage. Example: 220 V line and 200 V motor.
The DC link voltage regulation
inverter disable due to overvoltage trips
deceleration of loads with high inertia or short
It acts in order to increase the deceleration time
- inertia), thus avoiding the E01

CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
- Deceleration curve with DC Link voltage regulation
By this function an optimized deceleration time
(minimum) is achieved for the driven load.
This function is useful in applications with medium
inertia that require short deceleration times.
In case of overvoltage trip during the decelearation,
increasethe time of the deceleration ramp (P101 and/
The motor will not stop if the line is permanently with
> P151). In this case, reduce the line
voltage, or increase the value of P151.
If even with these settings the motor does not
decelerate within the required time, you will have the
alternative to increase P136;
This function is used to protect the motor against
overload (I xt function -E05).
The motor overload current is the current level above
which the inverter will consider the motor operating
underoverload.Thehigher the difference between the
motorcurrent and the overload current, the sooner the
I x t function - E05 - will act.
- I x t function – Overload detection
Parameter P156 shall be set to a value 10 % to 20 %
higher than the motor rated current.

DETAILED PARAMETER DESCRIPTION
Prevents motorstalling during an overload
increases its current will increase too
current attempts to exceed the value set at
motor speed will be decreased by following the
decelerationrampuntil the currentbecomes lowerthan
P169. As soon as the overload condition disappears,
the motor speed is resumed.
- Curves showing the operation of the current
Decelerationramp (P101/P103)
The "current limiting" function disabled when setting
Defines the inverter control mode.
6.3.3 Configuration Parameters - P200 to P398
Linear V/F Control (scalar)
Quadratic V/F Control (scalar)
- P202 setting for each control type
As shown in table above, there are 2 V/F control
Linear V/F control: this control mode ensures a flux
in the motor air gap approximately constant from
3Hzup to the field weakening
the parameters P142 and P145).
Thus in this speed range, an approximately constant
torque capacity is obtained.

CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
recommended for belt conveyors, extruding
Quadratic V/F control: in this controlmode the flux in
the motor air gap is proportional to the output
frequencyup to the field weakening point (defined at
P142 and P145). Thus the torque capacity is a
function of the quadratic speed.The main advantage
of this type of control is the energysaving capability
with variable torque loads, due to the reduction of
the motor losses (mainly due to motor iron losses
Example of a application: centrifugal pumps, fans,
- V/F Control modes (scalar)

DETAILED PARAMETER DESCRIPTION
Programs all parameters to the standard factory
In the event of a fault trip, except for E09, E24, E31
and E41, theinverter can start an automatic reset after
the time given by P206 is elapsed.
If P206 2 Auto-Reset does not occur.
If after Auto-Reset the same fault is repeated three
times consecutively, the Auto-Reset function will be
disabled. A fault is considered consecutive if it
happens again within 30 seconds after theAuto-Reset.
Thusifa faultoccurrsfour times consecutively, this fault
remains indicated permanently (and inverterdisabled).
Selects or not the PID Regulator special function.
- P203 configuration to use or not the
PID regulator special function
For PID Regulator special function see detailed
description of the related parameters (P520 to P528).
When P203 is changed to 1, it is necessarytoprogram
one of the digital inputs P263 to P266 for 27
The parameters P142 (max. output voltage),
P145 (field weakening frequency), P156 (motor
overload current),P169 (maximumoutput current)
It allows that the read-onlyparameter P002 indicates
the motor speed in any value, for instance, rpm.
The indication of P002is equalto the output frequency
value (P005) multiplied by the value of P208, i.e.,
Always when the value ofthe multiplication of P208 x
P005 is higher than 999, the displayed value remains
Defines the point where there is automatic gradual
reductionof the switching frequency.
This improves considerably the measurement of the
output current at low frequencies, and consequently
improves the inverter performance.
In application where it is not possible to operate the
inverter at low frequencies, ex. 2.5 kHz (for instance,
due to acoustic noise), set P219 = 0.0.

CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
Definesthefrequencyreferenceselection intheLocaland
Keys and of the HMIs (P121)
Analog input AI1' (P234, P235 and P236)
Electronic potentiometer (EP)
HMI potentiometer (Onlyon Plus version)
Multispeed (P124 to P131)
- P221 programming (local mode) or P222
(remote mode) for speed reference selection
The direction of rotation is the only operation control
thatdepends on other parameter for operation - P231.
For more details, refer to Items 6.2.2, 6.2.3 and 6.2.4.
Define the control sources for the inverter enabling /
- P229 and P230 programming to origin selection of
AI1’is the value of the analog input AI1 when gainand
offset have been applied.
For factory default setting,the local reference is via
keys of the keypad and the remote
reference is via analog input AI1. On CFW-10 Plus
version, local reference via HMI potentiometer is the
The reference value set by the and keys is
contained in parameter P121.
For more details about the Electronic Potentiometer
(EP) operation, refer to figure 6.19.
When option 6 (multispeed) is selected, set P263-
P264 and/or P265 and/or P266 to 7/8.
For more details, refer to items 6.2.2 and 6.2.4.
Program P263 or P264 or P265 or P266 in 26 when
option 7 (frequency input) is selected.

DETAILED PARAMETER DESCRIPTION
Defines the direction of rotation.
P231012Direction of rotation
- P231 programming to select rotation direction
Note that there is always a dead zone at thestarting of
the curve where the frequency reference remains at
thevalue of the minimum frequency (P133), even when
the input signal is changed. This dead zone is only
suppressed when P133 = 0.0.
The internal value AI1' that defines the frequency
referenceto be used bytheinverter,isgiven as percent
of the full scale reading and is obtained by using one
of the following equations (see P235):
- Analog Input AI1 Signal x Frequency reference
The analog input AI1 defines the inverter frequency
reference as shown in the curve below.
- Analog input signal AI1 (P235) definition
- AI1 is given in V or mA, according to the used signal
- GAIN is defined by the parameter P234;
- OFFSET is defined by the parameter P236.

CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
This is shown in the block diagram below:
- Block diagram of the analog input A1
Following situation as example:AI1 is the voltageinput
(0-10 V - P235 = 0), AI1 = 5 V, P234 = 1.00 and
The motor will run in reverse direction of rotation as
defined by the commands (negative value) - if this is
possible (P231 = 2), with a module reference equal to
0.2 or20%of the maximum output frequency (P134).
I.e.,if P134 = 66.0 Hz, then the frequency reference is
AI1'=5+(-70).1=-0.2=-20 %
The analog input AI1 defines the inverter frequency
reference as shown in the curve below.
- Analog Input AI1 Signal x Frequency reference

DETAILED PARAMETER DESCRIPTION
Note that there is always a dead zone at thestarting of
the curve where the frequency reference remains at
thevalue of the minimum frequency (P133), even when
the input signal is changed. This dead zone is only
suppressed when P133 = 0.0.
The internal value AI1' that defines the frequency
referenceto be used bytheinverter,isgiven as percent
of the full scale reading and is obtained by using one
of the following equations (see P235):
- AI1 is given in V or mA, according to the used signal
- GAIN is defined by the parameter P234;
- OFFSET is defined by the parameter P236.
This is shown in the block diagram below:
- Block diagram of the analog input A1
- Analog input signal AI1 (P235) definition
Following situation as example: AI1 is the voltage
input (0-10 V - P235 = 0), AI1 = 5 V, P234 = 1.00
The motor will run in reverse direction of rotation as
defined by the commands (negative value) - if this is
possible (P231 = 2), with a module reference equal to
0.2 or20%of the maximum output frequency (P134).
I.e.,if P134 = 66.0 Hz, then the frequency reference is

CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
Defines the signal type of the analog input, as shown
(0 to10) V or (0 to 20) mA
It configuresthetimeconstant of the analog inputs filter
between 0 (without filtering) and 200 ms.
Thus the analog input will have a response time equal
to three time constants. For instance, if the time
constant is 200 ms, and a stepis applied to the analog
input, the response will be stabilized after 600 ms.
Check possible options on table below and details
about each function operation in Figure 6.19.
- P235 setting according to signal type/excursion
- DI´s functions programming

DETAILED PARAMETER DESCRIPTION
Functions activated with 0 V at digital input.
not used or general enable
:-if the command source are the terminals, i.e.,
if P229 = 1 for the local mode or
the digital input selected
operates as general enable;
- otherwise, no function is assigned to the digi-
P263 to P266 = 2 (general enable):
- Regardless of the command source being the
terminals or the keys, P229 = 0 or 1, or
P230 = 0 or 1, the selected digital input works
The selection of P263 to P266 = 16 / 17, P263
to P266 = 18/19 and/or, P263 to P266 = 22/23
requires the programming of P221 and/or
5)The selection (P263 or P264) and/or P265 and/
or P266 = 7 / 8 (multispeed) requires the
programming of P221and/or P222 = 6.
- DI´s functions programming
Start13Stop14Activates Ramp 2
Accelerated EP with Ramp 2
Decelerates EP with Ramp 2

CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
When setting P263 to P266 = 26 it is necessary
to set P221 and/or P222 = 7.
P263 and P266 =27 selection requires P203 = 1
8)If different accelerationanddeceleration times are
desired for a given operation condition (for
instance for a set of frequencies or for a direction
),check if it pos sible to use the
multispeed function with Ramp 2 and FWD/REV
Onlyone digitalinput can be programmed for each
function. If more than o ne input has been
programmed, programming errorwill be displayed
- Details about the function of the digital inputs

DETAILED PARAMETER DESCRIPTION
d) FORWARD RUN / REVERSE RUN
e) ELECTRONIC POTENTIOMETER (EP)
- Details about the function of the digital inputs

CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
(*) The condition that generates the fault remains
- Details about the function of the digital inputs

DETAILED PARAMETER DESCRIPTION
k) ELETRONIC POTENTIOMETER (EP)
(START/ACCELERATE) - (DECELERATE /STOP)
- Details about the operation of the relay input functions
Digital input signal frequency: 0.5 to 300 Hz.

CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
Table below shows the available options.
Defines the frequency input gain, according to the
- Details about the operation of the relay output fucntions
Digital input signal frequency: 0.5 to 300 Hz.

DETAILED PARAMETER DESCRIPTION
- Details about the operation of the relay output fucntions
When the definition in thefunction name is true, the di-
gital output will be activated, i.e., the relay coil is
When the option 'Not used'has been programmed, the
relay output(s) will be disabled, i.e., the coil is not
Definitions of the used symbols in thefunctions:
Fs = P005 - output frequency (motor)
Is = P003 - output current (motor)
Used in the relay output functions Fs > Fx, Fe > Fx e
- Inverter rated current definition

CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
Defines the switching frequency of the IGBTs in the
The switching frequency is a comprimise between the
motor acoustic noise level and the inverters
losses.Higher switchingfrequencies cause lower mo-
tor acoustic noise level, but increase the
increasingthe drivecomponents temperature and thus
reducing their useful life.
The predominant frequency on the motor is twice the
switching frequency setat P297.
Thus, P297 = 5 kHz results in an audible motor noise
corresponding to 10 kHz. This is dueto the used PWM
Thereduction of theswitching frequencyalsocontributes
to the reduction of instability and ressonance that may
occur in certain applicationconditions,as well asreduces
theemission of electromagnetic energy by theinverter.
Thereduction of theswitching frequenciesalso reduces
the leakage currents to ground.
Use currents according to table below:
The DC braking feature provides a motor fast stop via
The applied DC braking current, that is proportional to
the braking torque, is set at
P302.The figures below show the DC branking operation at
thetwo possible conditions: rampdisabling and general
Current values for values of P297

DETAILED PARAMETER DESCRIPTION
Before DC braking starts, there is a "Dead Time" (mo-
torruns freely)required for the motor demagnetization.
This time is function of the motor speed at which the
DC braking occurs (output frequency).
During the DC braking the LED display flashes
If the inverter is enabled during the braking process,
this process will be aborted and motor operates
DC braking can continue its braking process even after
the motor has stopped. Pay special attention to the
dimensioning of the motorthermalprotection for cyclic
In applications where the motor current is lower than
therated inverter current, and where the braking torque
is not enough for the brakingcondition, pleasecontact
WEG to optimize the settings.
- DC braking after ramp disable
Figure6.22-DC braking after general disable

CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
Special Functions Parameters – P500 to P599
Introduction
Other application examples: level control, temperature,dosing, etc.
The CFW -10 isfitted with PID regulator function that can be used
for clo sed loop process control. T his function works as a
proportional, integral and derivativeregulator which superimposes
the normal inverter speed control.
The speedwill be changed in orderto maintain the processvariable
(the one that want to be controlled – for example: water level of a
reservoir) at the desired value, set at the reference (set point).
For instance,a motor connected to apump and driven by aninver-
ter makes a fluid circulate into the piping. The inverter itself can
make the flow control into the piping by means of the PID regulator.
In this case, for example, the set point (flow) could be given by the
input (HMI Potentiometer) or through P525 (digital set point) and
the flow feedback signal would come to the analog AI1 input.
Other application examples: level control, temperature,dosing, etc.
6.3.4.2 Description
Figure 6.23 shows a schematic representation of PID regulator
The feedback signal must come in the analog input AI1.
The set pointistheprocess variable value which desiresto operate.
Thisvalue is entered as percentage,anditisdefinedbythe following
full scale of used sensor (UP)
Where both set point and full scale of the used sensor are given by
the process unit (i.e., °C, bar, etc.).
Example: A pressure transducer (sensor) with 4 - 20 mA output and
25 bar full scale (i.e., 4 mA = 0 bar and 20 mA = 25 bar) and
P234 = 200. If 10 bar is desired to control, the following set point
The set point can be defined via:
- Keypad: digital set point, P525 parameter.
- Input (HMI potentiometer) (only available in the CFW-10 Plus):
the percentage value is calculated based on P238 and P240
(see description of these parameters).

DETAILED PARAMETER DESCRIPTION
The P040 parameter indicates the pro cess variable va lue
(feedback) in the selected scale at P528, which isset according to
full scale of used sensor
Example: Consider the previous example data (pressure sensor of
bar andP234= 200). P528mustbe set to (25/200) x 100 = 12.5.

CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
(processvariable measurement)
- PID regulator function block diagram
In case of none digital input has been selected for manual/automatic
function, the PID alwayswill work on the automatic condition.

DETAILED PARAMETER DESCRIPTION
When PID (P203 = 1) function is enabled:
Program one of the digital inputs DIX(P263 to P266 = 27). In this
manner, withclosedDIX it operates in manualmode(withoutclosing
the loop control – feedback) and opening the DIX the PID regulator
startsto operate (closed loop control –automatic mode). If there is
no digital input (DIx) selected for manual/automatic function (P263
to P266 = 27), the inverter operation always will be in automatic
If P221 or P222 is equal to 1, 2, 4, 5, 6 or 7 there will be an E24
Set P221 and P222 equal to 0 or 3 as need.
In manual mode the frequencyreference is given by F* according
When changed from manual to automatic, P525 = P040 is
automatically set if P536 = 0 (at the moment immediately before
the commutation).In thismanner, if thesetpointis definedby P525
(P221 or P222 = 0) and changed from manual to automatic,
P525 = P040 is automatically set, since P536 parameter is active
(P536= 0). In this case, the commutation from manualto automatic
is smooth (there is no abrupt speed variation).
The following figure 6.24 shows an application example of an in-
verter controlling a process in closedloop (PID regulator).
Startup Guide
Find below a start-up procedure for the PID regulator:
Process - TodefinethePIDtype of action thatthe process requires:
direct or reverse. The control actionmustbe direct(P527 = 0)when
it is required to increase the motor speed and so also increment
the process variable. Otherwise select reverse (P527 = 1).
a) Direct: Pump driven by an inverter and filling a reservoir where the
regulates the reservoir level. To increase the reservoir level
variable) the flow must be increased and consequently
motor speed must be increased.
b) Reverse: Fan drivenby an inverter to cool a cooling tower, with the
PID controlling the tower temperature.
When it is required to increase the temperature(process variable),
the cooling must be decreased by reducing the motor speed.
2) Feedback (process variable measurement):
It is always via analog input AI1.
Transducer (sensor) to be used for the feedback of the control
variable: it is recommended to use a full scale sensor with
minimum 1.1 times higher than the largestvalue of the process
variable that shall be controlled. Example: If a pressurecontrol
at 20 bar is desired, select a sensor with a control capacity of at
.92CHAPTER 6 - DETAILED PARAMETER DESCRIPTION

Signal type: set P235 according to transducer signal (4-20 mA,
Set P234 according to the variation range of the used feedback signal
(for more details see parameters descriptions P234 to P240).
Example: suppose the following application:
Full scale of the transducer (maximum value at thetransducer
output) = 25 bar (FS = 25);
Operation range (range of interest) = 0 to 15 bar (FO = 15).
Considering a safety margin of 10 %, the measuring range of the
process variable must be set to: 0 to 16.5 bar.
Thus: FM = 1.1 x FS = 16.5.
In this manner, the P234 parameter must be set to:
As the operation range starts at zero, P236 = 0.
Thus, a set point of 100 % represents 16.5 bar, i.e., the operation
range, in percentage is: 0 to 90.9 %.
In most of the cases it is not necessary to set the gain and the offset
(P234 = 100 and P236 = 0.0). Thus, the percentage value of the set
pointis equivalent to the percentage value of the full scale used sensor.
However, ifthemaximum resolutionof the analoginput AI1(feedback)
is desired, set P234 per previous explanation.
Setting of the display indication to the process variable measuring
unit (P040): set P528 according to the full scale of the used transducer
(sensor) and defined P234 (see the following description of parameter
3) Reference (set point):
Reference source: Set P221 or P222 according to last definition.
4) Speed Limits: Set P133 and P134 according to the application.
1) Manual Operation (closed DI):
Display indication (P040): check indication based on external
measurement and on the feedback signal (transducer) at AI1.
Vary the frequency reference (F*) until the desired value of the
process variable is reached.
Only then switch to the automatic mode(inverter willset automatically
P525 = P040), if P536 equal to zero.

DETAILED PARAMETER DESCRIPTION
2)Automatic Operation: open the DI and make the dynamic setting of
the PID regulator, i.e., set the proportional gain (P520), integral
gain (P521) and differential gain (P522).
The inverter setting must be correct in order to obtain a good
of the PID regulator. Ensure the following settings:
orque boosts (P136 and P137) and slip compensation (P138) in
V/F mode control (P202 = 0 or 1);
cceleration and deceleration ramps (P100 to P103);
urrent limitation (P169).
Inverter parameterization:
potentiometer according to
- Application example of an inverter with PID regulator
Input via terminals 6 and 7

CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
The integral gain can be defined as being the time
requiredto vary the PI regulator output from 0 to P134,
That is given, in seconds, by the equation below:
For the followingconditions:
Dix in automatic position.
Provides the set point (reference) of the process via
keys and for PID regulator since P221 = 0
(local) or P222 = 0 (remote) and it has been set to
automatic mode. If it has been set to manual mode
the keys reference is provided by P121
If P120 = 1 (active backup), the value of P525 is
maintained atthe last set value (backup), even when
the inverter is disabled or not energized.
Sets the time constant of the process variable filter.
It is useful for noise filtering at the analog input AI1
(feedback of the process variable).
Defines the action type of the PID control.
Select according to the table below:
- PID action type configuration
- Options operation description for P527

DETAILED PARAMETER DESCRIPTION
Defines the process variables scale. It makes the
conversion betweenpercentage value (internally used
by the inverter) and the process variable unit
P528 defines how the process variable at P040 will
be showed:P040 = value % x P528.
P528 = full scale of used sensor (FM)
Allows the user to enable/disable a copy of P040
(p ro cess vari able) in P525, whe n there is a
commutation of PID operation mode from manual to
Active (copies the value of P040 in P525)
Inactive(doesnot copies thevalueofP040 in P525)

DIAGNOSTICSANDTROUBLESHOOTING
This chapter assists the user to identify and correct possible faults
that can occur during the CFW-10 operation. Also instructions about
required periodical inspections and cleaning procedures are also
When a fault is detected, the inverter is disabled and the fault code is
displayed on the readout in E
To restart the inverterafter a fault has occurred, the inverter must be
reset. The reset can be made as follows:
disconnect and reapply the AC power (power-on reset);
press key (manual reset);
automatic reset through P206 (auto-reset);
via digital input: DI1 to DI4 (P263 to P266 = 21).
The table below defines each fault code, explains how to reset the
fault and shows the possible causes for each fault code.
Short-circuit between two motor phases.
If this fauklt occurs during power-up, there may be short-
ground and one of more output phases.
Inertia of the load too high, or acceleration ramp too short.
Undue set of P136 and/or P137.
IGBT transistor module is short-circuited.
Power supply voltage too high, generating in the DC link
a voltage higher thanthe allowed value:
Ud > 410 V - Models 200-240 V
Ud > 460 V - Models 110-127 V
Load inertia too high and acceleration ramp is too short
Setting of P151 too high.
Power supply voltage too low, causing a DC link
voltage higher than the allowed value (read the value
Ud < 200 V - Modelos 200-240 V
Ud < 250 V - Modelos 110-127 V

CHAPTER 7 - DIAGNOSTICS AND TROUBLESHOOTING
In case of E04 Fault due to inverter overtemperature, allow the
inverter to cool down before trying to reset it.
The faults act as follows:
E00 to E06: switches off the relay that has been programmed to
“no fault”, disables the PWM pulses, displays the fault code onthe
display. Some data are saved on the
ence and EP (electronic potentiometer) (when the function
“backup of the references
the status of the integrator of the I x t function
E24: Indicates the fault code on the LED display.
do not allow inverter operation (it is not
possible to enable the inverter); the fault code is indicated on the
Ambient temperature too high (> 50 ºC), (> 40 °C for the
15.2Amodel) and/or output current too high.
Blocked or defective fan.
Theheat sink overtemperatureprotection(E04)isactivated
when the heat sink temperature (P008) reaches 103 ºC
or 133 ºC for the 15.2 A model.
P156 set too low for the motor that is being used.
Motor is under an actual overload condition.
Wiring at DI1 to DI4 inputs is open [not connected to
GND (pin 5 of the XC1 control connector)].
Memory with corrupted values.
It is automatically reset
Incompatible parameters were programmed
Inverter control circuitis defective.
Electrical noise in the installation (electromagnetic
Inverter power circuit is defective.

CHAPTER 7 - DIAGNOSTICS AND TROUBLESHOOTING
TROUBLESHOOTING
1.Check the power and the control connections. For example,
the digital inputs DIx programmedfor Start/Stop or General Enable
or No External Fault must be connected to GND (pin 5 of the
1.Check if the external signal is properly connected.
2.Check the status of the speed potentiometer (if used).
1.Check if the parameters are properly programmed for the
Fault1.Check if the inverter has not been disabled due to detected fault
condition (refer to table above).
Increase P169 or P136/P137.
1.Disable the inverter, switch OFF the power supply and tighten all
1.Replace the defective speed potentiometer.
1.Identify the cause of the variation.
1.Check if the contents of P133 (minimum frequency)
and P134 (maximum frequency) are according to the motor
1.Check the control signal level of the reference.
2.Check the programming (gains and offset) at P234 to P236.
1.Check if the used motor meets the application requirements.
1.The power supply must be within the following ranges:

CHAPTER 7 - DIAGNOSTICS AND TROUBLESHOOTING
When contacting WEG for services, please have the following data
Serial number, manufacturing date and hardware revision, as
indicated on the inverter nameplate (refer to section 2.4);
Software version (refer to section 2.2);
Information about the application and inverter programming.
For further clarification,training orservice,please, contactourService
CONTACTING WEG
Always disconnect the power supply voltage before touching any
componentof the inverter.
Even after switching OFF the inverter, high voltages may be present.
Wait 10 minutes to allow complete dischargeof the power capacitors.
Always connect the equipment frame to a suitable ground (PE) point.
Electronic boards have components sensitive to electrostatic
Never touch the components or connectors directly. If this is
unavoidable, first touch the metallic frame or use a suitable ground
Never apply a high voltage test on the inverter!
If this is necessary, contactWEG.
To avoid operation problems caused by harsh ambient conditions,
suchashightemperature, moisture, dirt,vibration or premature ageing
of the components, periodic in spections of the inverter and
installations are recommended.

CHAPTER 7 - DIAGNOSTICS AND TROUBLESHOOTING
- Periodic inspection after start-up
When required to clean the inverter, flow the instructions below:
Remove AC powerfrom the inverter and wait 10 minutes.
Remove all dust from ventilation openings by using a plastic brush
Remove dust accumulatedon the heatsink fins and from the blower
blades with compressed air.
Remove AC powerfrom the inverter and wait 10 minutes.
Disconnect the inverter cables, ensuring that they are marked
carefully to facilitate later reconnection.
Remove all dust from the printed circuit boards by using an anti-
static soft brush and/or remove it with an ionized compressed air
gun; (for example: Charges Burtes Ion Gun (non nuclear) Ref.
It is recommended to change the fans after 40.000 operation hours.
Dust, oil or moisture accumulation
Clean them and/or replace them