Kruger Ecowatt Drive K120 Series User manual

Ecowatt®Drive K120 series Change history
No.
Change description
Version
Release date
1
First release
V1.0
June 2021

Ecowatt®Drive K120 series Preface
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Preface
The Ecowatt Drive K120 series is a 1phase input –3phase output variable-frequency
drive (VFD) that specific designed to be applied in Fan application which integrates the
latest Safety and Energy-saving functions for the demand control ventilation system. It
can drive both synchronous motors and asynchronous motors.
[Save Energy]
This VFD adopts dedicated PID control mode for Demand Control Ventilation system to
optimizes the voltage output of the VFD to the actual load of the FAN motor, thus
minimizing its power consumption.
[Easy Control]
It supports multiple kinds of popular control signal (0-10V signal, 4-20mA) and Modbus
communication to realize complicated system solutions.
[High Performance]
It armed with advanced vector control technology and the latest digital processor
dedicated for motor control, thus enhancing product reliability and adaptability to the
environment.
[High Reliability]
Ecowatt Drive K120 uses low power density design. All power ranges carry built-in DC
reactor and braking unit to save installation space. Through overall EMC design, it can
satisfy the low noise and low electromagnetic interference requirements to cope with
challenging grid, temperature, humidity and dust conditions, thus greatly improving
product reliability.
This operation manual presents installation wiring, parameter setup, fault diagnosis
and troubleshooting, and precautions related to daily maintenance.
Read this manual carefully before installation to ensure the VFD is installed and
operated in a proper manner to give full play to its excellent performance and powerful
functions.
If the product is ultimately used for military affairs or manufacture of weapon, it will be
listed on the export control formulated by Foreign Trade Law of the People's Republic of
China. Rigorous review and necessary export formalities are needed when exported.
Our company reserves the right to update the information of our products.

Ecowatt®Drive K120 series Contents
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Contents
Contents..............................................................................................................................................i
1 Safety precautions........................................................................................................................ 1
1.1 Safety definition............................................................................................................................. 1
1.2 Warning symbols.......................................................................................................................... 1
1.3 Safety guidelines...........................................................................................................................2
1.3.1 Delivery and installation...................................................................................................2
1.3.2 Commissioning and operation .......................................................................................3
1.3.3 Maintenance and component replacement ...............................................................3
1.3.4 What to do after scrapping ..............................................................................................4
2 Product overview .........................................................................................................................5
2.1 Quick startup ..................................................................................................................................5
2.1.1 Unpacking inspection........................................................................................................5
2.1.2 Checking before applying ................................................................................................5
2.1.3 Environment confirmation .............................................................................................5
2.1.4 Installation confirmation.................................................................................................6
2.1.5 Basic commissioning ........................................................................................................7
2.2 Product specification ..................................................................................................................7
2.3 Product nameplate.......................................................................................................................9
2.4 Mode code.......................................................................................................................................9
2.5 Rated specifications...................................................................................................................10
2.6 Structure diagram ......................................................................................................................10
3 Installation guidelines............................................................................................................... 13
3.1 Mechanical installation............................................................................................................13
3.1.1 Installation environment................................................................................................13
3.1.2 Installation direction .......................................................................................................14
3.1.3 Installation mode ..............................................................................................................15
3.2 Standard wiring..........................................................................................................................16
3.2.1 Wiring of main circuit.....................................................................................................16
3.2.2 Main circuit terminals....................................................................................................16
3.2.3 Wiring procedure of the main circuit terminals ....................................................17
3.2.4 Wiring of control circuit.................................................................................................18
3.2.5 Control circuit terminals................................................................................................18
3.2.6 Input/output signal connection diagram ................................................................ 20
3.3 Wiring protection .......................................................................................................................21
3.3.1 Protecting the VFD and input power cable in short circuit.................................21
3.3.2 Protecting the motor and motor cable...................................................................... 22
3.3.3 Bypass connection .......................................................................................................... 22
4 Keypad operation procedure ...................................................................................................23
4.1 Keypad introduction ................................................................................................................. 23

Ecowatt®Drive K120 series Contents
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4.2 Keypad display........................................................................................................................... 26
4.2.1 Displaying stopped-state parameters ....................................................................... 26
4.2.2 Displaying running-state parameters ...................................................................... 26
4.2.3 Displaying fault information ....................................................................................... 27
4.2.4 Editing function codes .................................................................................................. 27
4.3 Operatons on the keypad ........................................................................................................ 27
4.3.1 Modifying VFD function codes.................................................................................... 27
4.3.2 Setting a password for the VFD .................................................................................. 28
4.3.3 Viewing VFD status........................................................................................................ 29
5 Function parameter list.............................................................................................................30
P00 group Basic functions .............................................................................................................31
P01 group Start and stop control ................................................................................................. 39
P02 group Motor 1 parameters .....................................................................................................44
P03 group Vector control ................................................................................................................51
P04 group SVPWM control ........................................................................................................... 56
P05 group Input terminals ............................................................................................................ 62
P06 group Output terminals.......................................................................................................... 70
P07 group HMI .................................................................................................................................. 74
P08 group Enhanced functions ................................................................................................... 83
P09 group PID control ......................................................................................................................91
P10 group Simple PLC and multi-step speed control............................................................ 96
P11 group Protection parameters .............................................................................................. 100
P13 group SM control .................................................................................................................... 104
P14 group Serial communication...............................................................................................106
P17 group Status viewing .............................................................................................................108
6 Fault tracking............................................................................................................................ 113
6.1 Fault prevention........................................................................................................................ 113
6.1.1 Periodical maintenance ................................................................................................ 113
6.1.2 Cooling fan ........................................................................................................................ 116
6.1.3 Capacitor............................................................................................................................ 117
6.1.4 Power cable....................................................................................................................... 118
6.2 Fault handling........................................................................................................................... 118
6.2.1 Indications of alarms and faults................................................................................ 118
6.2.2 Fault reset ......................................................................................................................... 119
6.2.3 VFD faults and solutions.............................................................................................. 119
6.2.4 Other states ......................................................................................................................123
7 Communication protocol ........................................................................................................124
7.1 Brief instruction to Modbus protocol................................................................................. 124
7.2 Application of the VFD............................................................................................................125
7.2.1 2-wire RS485.....................................................................................................................125

Ecowatt®Drive K120 series Contents
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7.2.2 RTU mode .........................................................................................................................127
7.3 RTU command code and communication data.............................................................. 131
7.3.1 Command code 03H, reading N words (continuously up to 16 words) .......... 131
7.3.2 Command word 06H, writing a word ......................................................................132
7.3.3 Command code 08H, diagnosis..................................................................................133
7.3.4 Command code 10H, continuous writing ...............................................................134
7.4 Data address definition ..........................................................................................................135
7.4.1 Function code address format rules .........................................................................135
7.4.2 Description of other function addresses.................................................................136
7.4.3 Fieldbus scale ................................................................................................................. 140
7.4.4 Error message response...............................................................................................141
7.5 Read/Write operation example ............................................................................................143
7.5.1 Examples of read command 03H...............................................................................143
7.5.2 Examples of write command 06H ............................................................................143
7.5.3 Examples of continuously write command 10H ..................................................145
7.6 Common communication faults ........................................................................................ 146
Appendix A Technical data .......................................................................................................147
A.1 Derated application................................................................................................................. 147
A.1.1 Capacity ............................................................................................................................ 147
A.1.2 A.1.2 Derating.................................................................................................................. 147
A.2 CE................................................................................................................................................. 148
A.2.1 CE marking ..................................................................................................................... 148
A.2.2 EMC compliance declaration.................................................................................... 148
A.3 EMC regulations...................................................................................................................... 148
A.3.1 VFD category of C2........................................................................................................ 149
A.3.2 VFD category of C3 ....................................................................................................... 149
Appendix B Dimension drawings ............................................................................................150
B.1 External keypad structure .....................................................................................................150
B.2 VFD dimensions ....................................................................................................................... 151
Appendix C Optional peripheral accessories ........................................................................ 154
C.1 Wiring of peripheral accessories.........................................................................................154
C.2 Power supply.............................................................................................................................156
C.3 Cables...........................................................................................................................................156
C.3.1 Power cables ....................................................................................................................156
C.3.2 Control cables..................................................................................................................156
C.4 Breaker and electromagnetic contactor ...........................................................................157
C.5 Reactors.......................................................................................................................................157
C.6 Filters ...........................................................................................................................................158
C.6.1 C3 Filter model description .........................................................................................158
C.6.2 C3 Filter model selection .............................................................................................159

Ecowatt®Drive K120 series Contents
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C.6.3 C3 filter installation instruction................................................................................160
C.6.4 C2 Filter model description ........................................................................................160
C.6.5 C2 Filter model selection ............................................................................................. 161
C.7 Braking resistors ...................................................................................................................... 161
C.7.1 Braking resistor selection............................................................................................ 161
C.7.2 Braking resistor installation ......................................................................................162
Appendix D Further information .............................................................................................164
D.1 Product and service queries................................................................................................. 164
D.2 Feedback on Kruger VFD manuals ................................................................................... 164
D.3 Documents on the Internet .................................................................................................. 164

Ecowatt®Drive K120 series Safety precautions
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1Safety precautions
Please read this manual carefully and follow all safety precautions before moving,
installing, operating and servicing the variable-frequency drive (VFD). If ignored,
physical injury or death may occur, or damage may occur to the devices.
If any physical injury or death or damage to the devices occurs for ignoring to the safety
precautions in the manual, our company will not be responsible for any damages and
we are not legally bound in any manner.
1.1 Safety definition
Danger:
Serious physical injury or even death may occur if not
follow related requirements
Warning:
Physical injury or damage to the devices may occur if not
follow related requirements
Note:
Physical hurt may occur if not follow related requirements
Qualified
electricians:
People working on the device should take part in
professional electrical and safety training, receive the
certification and be familiar with all steps and requirements
of installation, commissioning, operating and maintaining
the device to avoid any emergency.
1.2 Warning symbols
Warnings caution you about conditions which can result in serious injury or death
and/or damage to the equipment, and advice on how to avoid the danger. Following
warning symbols are used in this manual.
Symbols
Name
Instruction
Abbreviation
Danger
Danger
Serious physical injury or even death
may occur if related requirements are
not followed
Warning
Warning
Physical injury or damage to the
devices may occur if related
requirements are not followed
Do not
Electrostatic
discharge
Damage to the PCBA board may occur
if not related requirements are not
followed
Hot sides
Hot sides
Sides of the device may become hot.
Do not touch.
Note
Note
Physical hurt may occur if related
requirements are not followed
Note

Ecowatt®Drive K120 series Safety precautions
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1.3 Safety guidelines
Only qualified electricians are allowed to operate on the VFD.
Do not carry out any wiring and inspection or changing
components when the power supply is applied. Ensure all input
power supply is disconnected before wiring and checking and
always wait for at least the time designated on the VFD or until the
DC bus voltage is less than 36V. The waiting time list is as follows.
VFD module
Minimum waiting time
1PH 220V
0.4kW-4kW
5 minutes
Do not refit the VFD unauthorized; otherwise, fire, electric shock or
other injury may occur.
The base of the radiator may become hot during running. Do not
touch to avoid hurt.
The electrical parts and components inside the VFD are
electrostatic. Take measurements to avoid electrostatic discharge
during related operation.
1.3.1 Delivery and installation
Please install the VFD on fire-retardant material and keep the VFD
away from combustible materials.
Connect the braking optional parts according to the wiring diagram.
Do not operate on the VFD if there is any damage or components
loss to the VFD.
Do not touch the VFD with wet items or body; otherwise, electric
shock may occur.
Note:
Select appropriate moving and installing tools to ensure a safe and normal running
of the VFD and avoid physical injury or death. For physical safety, the erector
should take some mechanical protective measurements, such as wearing exposure
shoes and working uniforms.
Ensure to avoid physical shock or vibration during delivery and installation.
Do not carry the VFD by its cover. The cover may fall off.
Install away from children and other public places.
The leakage current of the VFD may be above 3.5mA during operation. Ground with
proper techniques and ensure the grounding resistor is less than 10Ω. The
conductivity of PE grounding conductor is the same as that of the phase conductor.
For models higher than 30kW, the cross sectional area of the PE grounding
conductor can be slightly less than the recommended area.

Ecowatt®Drive K120 series Safety precautions
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R, S and T are the input terminals of the power supply, while U, V and W are the
motor terminals. Please connect the input power cables and motor cables with
proper techniques; otherwise, the damage to the VFD may occur.
1.3.2 Commissioning and operation
Disconnect all power supplies applied to the VFD before the terminal
wiring and wait for at least the designated time after disconnecting
the power supply.
High voltage is present inside the VFD during running. Do not carry
out any operation except for the keypad setting.
The VFD may start up by itself when P01.21=1. Do not get close to the
VFD and motor.
The VFD cannot be used as "Emergency-stop device".
The VFD cannot be used to break the motor suddenly. A mechanical
braking device should be provided.
Note:
Do not switch on or off the input power supply of the VFD frequently.
For VFDs that have been stored for a long time, check and fix the capacitance and
try to run it again before utilization.
Cover the front board before running; otherwise, electric shock may occur.
1.3.3 Maintenance and component replacement
Only qualified electricians are allowed to perform the maintenance,
inspection, and components replacement of the VFD.
Disconnect all power supplies to the VFD before the terminal wiring.
Wait for at least the time designated on the VFD after disconnection.
Take measures to avoid screws, cables and other conductive
matters to fall into the VFD during maintenance and component
replacement.
Note:
Please select proper torque to tighten screws.
Keep the VFD, parts and components away from combustible materials during
maintenance and component replacement.
Do not carry out any isolation and pressure test on the VFD and do not measure the
control circuit of the VFD by megameter.

Ecowatt®Drive K120 series Safety precautions
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1.3.4 What to do after scrapping
The heavy metals inside the VFD should be treated as industrial
effluent.
When the life cycle ends, the product should enter the recycling
system. Dispose of it separately at an appropriate collection point
but not place it in the normal waste stream.

Ecowatt®Drive K120 series Product overview
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2Product overview
2.1 Quick startup
2.1.1 Unpacking inspection
Check as follows after receiving products:
1. Check whether the packing box is damaged or dampened. If yes, contact local
dealers or Kruger offices.
2. Check the model identifier on the exterior surface of the packing box is
consistent with the purchased model. If no, contact local dealers or Kruger
offices.
3. Check whether the interior surface of packing box is abnormal, for example, in
wet condition, or whether the enclosure of the VFD is damaged or cracked. If yes,
contact local dealers or Kruger offices.
4. Check whether the name plate of the VFD is consistent with the model identifier
on the exterior surface of the packing box. If no, contact local dealers or Kruger
offices.
5. Check whether the accessories (including user's manual and control keypad)
inside the packing box are complete. If not, please contact with local dealers or
Kruger offices.
2.1.2 Checking before applying
Check the machine before beginning to use the VFD:
1. Check the load type to verify that there is no overload of the VFD during work
and check whether the power class of the VFD needs to be increased.
2. Check whether the actual running current of the motor is less than the rated
current of the VFD.
3. Check whether the control accuracy required by the load is the same with that of
the VFD.
4. Check whether the grid voltage is consistent with the rated voltage of the VFD.
2.1.3 Environment confirmation
Check as follows before the actual installation and usage:
1. Check whether the ambient temperature of the VFD exceeds 40°C. If it exceeds
40°C, derate 1% for every increase of 1°C. It is not recommended to use the VFD if
the ambient temperature exceeds 50°C.
Note: For the cabinet VFD, the ambient temperature means the air temperature
inside the cabinet.

Ecowatt®Drive K120 series Product overview
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2. Check whether the ambient temperature of the VFD in actual use is lower than
-10°C. If yes, use heating facilities.
Note: For the cabinet VFD, the ambient temperature means the air temperature
inside the cabinet.
3. Check whether the altitude of the VFD in actual use exceeds 1000m. If it exceeds
1000m, derate 1% for every increase of 100m. When the altitude exceeds 3000m,
consult the local Kruger dealer or office for details.
4. Check whether the humidity of the actual usage site exceeds 90% and
condensation occurs. If yes, take additional protective measures.
5. Check whether the actual use site may be exposed to direct sunlight or may have
the chance of ingress of foreign objects. If yes, take additional protective
measures.
6. Check whether there is dust, explosive gas, or flammable gas in the actual use
site. If yes, take additional protective measures.
2.1.4 Installation confirmation
Check the following after the VFD installation:
1. Check whether the load ranges of the input power cable and motor cable meet
the actual load requirement.
2. Check whether correct accessories are selected for the VFD, the accessories are
correctly and properly installed, and the installation cables meet the
requirements of all components (including the reactor, input filter, output reactor,
output filter, DC reactor, braking unit and braking resistor).
3. Check whether the VFD is installed on non-flammable materials and the
heat-radiating accessories (such as the reactor and braking resistors) are away
from flammable materials.
4. Check whether all control cables and power cables are run separately and the
routing complies with EMC requirement.
5. Check whether all grounding systems are properly grounded according to the
requirements of the VFD.
6. Check whether all the installation clearances of the VFD meet the requirements
in the operation manual.
7. Check whether the installation conforms to the instructions in the operation
manual. It is recommended that the VFD be installed uprightly.
8. Check whether the external connection terminals of the VFD are tightly fastened
and the torque is appropriate.
9. Check whether there are screws, cables, or other conductive items left in the VFD.
If yes, get them out.

Ecowatt®Drive K120 series Product overview
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2.1.5 Basic commissioning
Complete the basic commissioning as follows before the actual use of the VFD:
1. Autotuning. If possible, de-coupled from the motor load to start dynamic
autotuning. Or if not, static autotuning is available.
2. Adjust the ACC/DEC time according to the actual running of the load.
3. Commissioning the device via jogging and check that the rotation direction is as
required. If not, change the rotation direction by changing the wiring of motor.
4. Set all control parameters and then operate.
2.2 Product specification
Function
Specification
Power input
Rated input voltage (V)
1PH 220V (-15%)–240V(+10%)
Rated input current (A)
Refer to "Rated specifications".
Rated frequency
50Hz or 60Hz; allowed range: 47–63Hz
Power
output
Output voltage (V)
0–input voltage
Output current (A)
Refer to "Rated specifications".
Output power (kW)
Refer to "Rated specifications".
Output frequency (Hz)
0–400Hz
Technical
control
performance
Control mode
SVPWM, SVC
Motor type
Asynchronous motor and permanent magnet
synchronous motor
Speed regulation ratio
Asynchronous motor 1:100 (SVC), synchronous
motor 1:20 (SVC)
Speed control precision
± 0.2% (SVC)
Speed fluctuation
± 0.3% (SVC)
Torque response
< 20ms ( (SVC)
Torque control
precision
10%
Starting torque
Asynchronous motor: 0.5Hz/150% (SVC)
Synchronous motor: 2.5 Hz/150% (SVC)
Overload capacity
150% for 1 minute, 180% for 10 seconds, and
200% for 1 second.
Running
control
performance
Frequency setting
method
Settings can be implemented through keypad
digits, analog, pulse frequency, multi-step
speed running, simple PLC, PID, Modbus
communication, and so on.
Settings can be combined and the setting
channels can be switched.

Ecowatt®Drive K120 series Product overview
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Function
Specification
Automatic voltage
regulation
The output voltage can be kept constant
although the grid voltage changes.
Fault protection
Provide comprehensive fault protection
functions, such as protection against
overcurrent, overvoltage, undervoltage,
overtemperature, phase loss, and overload.
Speed tracking restart
Used to implement impact-free smooth startup
for rotating motors.
Peripheral
interface
Analog input
One input (AI2) 0–10V/0–20mA and 1 input
(AI3) -10–10V.
Analog output
Two inputs (AO1 and AO2) 0–10V/0–20mA.
Digital input
Four regular inputs; max. frequency: 1kHz;
One high-speed input; max. frequency: 50kHz
Digital output
One Y1 terminal output
Relay output
Two programmable relay outputs:
RO1A: NO; RO1B: NC; RO1C: common terminal;
RO2A: NO; RO2B: NC; RO2C: common terminal.
Contact capacity: 3A/AC250V
Others
Installation mode
Wall and rail installation for the 1PH 220V
(≤2.2KW) VFD models.
Wall and flange installation for the 1PH 220V
(4kW) VFD model.
EMI filter
1PH 220V (4kW) VFD model can satisfy the
requirements of IEC 61800-3 C3, other models
can satisfy the requirements of IEC 61800-3 C3
by installing optional external filter. The whole
series can satisfy the requirements of IEC
61800-3 C2 by installing optional external filter.
Temperature of running
environment
-10–+50°C; derating is required if the ambient
temperature exceeds 40°C.
Altitude
Below 1000m.
When the altitude exceeds 1000m, derate by 1%
for every increase of 100m.
When the altitude exceeds 3000m, consult the
local Kruger dealer or office for details.

Ecowatt®Drive K120 series Product overview
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Function
Specification
Ingress protection
rating
IP20
Note: The VFD with plastic casing should be
installed in metal distribution cabinet, which
conforms to IP20 and of which the top
conforms to IP3X.
Safety
Meet the requirement of CE.
Cooling mode
Forced air cooling.
2.3 Product nameplate
Kruger Ventilation Industries Asia Co., Ltd.
Model: K120-2R2G-2 IP20
Power: 2.2kW
Input: AC 1PH 220V(-15%)-240(+10%) 24A
47Hz-63Hz
Output: AC 3PH 0-Uinput 10A 0Hz-400Hz
S/N: Made in China
tuv-sud.com/
ps-cert
Type
tested
Production
monitored
Figure 2-1 Product nameplate
Note: This is a nameplate example of a standard VFD product. The CE/TUV/IP20
marking on the top right will be marked according to actual certification conditions.
2.4 Model code
The model code contains product information. You can find the model code on the VFD
nameplate or simplified nameplate.
K120 –2R2G –2
①②③
Figure 2-2 Product model
Field
No.
Description
Content
Abbreviation
of product
series
①
Abbreviation
of product
series
K: Kruger
1: Single phase
20: ingress protection (IP) rating, IP20
Rated power
②
Power range
+ Load type
2R2: 2.2kW
G: Constant torque load

Ecowatt®Drive K120 series Product overview
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Field
No.
Description
Content
Voltage
class
③
Voltage
class
2: AC 1PH 220V(-15%)–240V(+10%)
2.5 Rated specifications
Model
Voltage
class
Output power
(kW)
Input current
(A)
Output current
(A)
K120-0R4G-2
1PH 220V
0.4
6.5
2.5
K120-0R7G-2
0.75
9.3
4.2
K120-1R5G-2
1.5
15.7
7.5
K120-2R2G-2
2.2
24
10
K120-004G-2
1PH 220V
4
40
16
2.6 Structure diagram
The following figure shows the structure of the VFD (1PH 220V, ≤2.2kW).
6
12
8
10
7
3
2
5
1
9
11
4
13
Figure 2-3 Product structure (1PH 220V, ≤2.2kW)
No.
Item
Description
1
External keypad port
Connect the external keypad.
2
Port cover
Protect the external keypad port.
3
Sliding cover
Protect the internal parts and components.
4
Hole for the sliding cover
Fix the sliding cover.

Ecowatt®Drive K120 series Product overview
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No.
Item
Description
5
Trunking board
Protect the inner components and fix the cables of
the main circuit.
6
Product nameplate
See section 2.3 "Product nameplate" for detailed
information.
7
Potentiometer knob
Refer to Chapter 4 "Keypad operation procedure".
8
Control terminals
See Chapter 3 "Installation guidelines" for detailed
information.
9
Main circuit terminals
See Chapter 3 "Installation guidelines" for detailed
information.
10
Screw hole
Fix the fan cover and fan.
11
Cooling fan
See Chapter 6 "Fault tracking" for detailed
information.
12
Fan cover
Protect the fan.
13
Bar code
The same as the bar code on the name plate.
Note: The bar code is on the middle shell which is
under the cover.
Note: In above figure, the screws at 4 and 10 are provided with packaging, and specific
installation depends on the requirements of customers.
The following figure shows the structure of the VFD (1PH 220V 4kW).
Figure 2-4 Product structure (1PH 220V, 4kW)

Ecowatt®Drive K120 series Product overview
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No.
Item
Description
1
Keypad port
Connect the keypad.
2
Cover
Protect the internal parts and components.
3
Keypad
Refer to Chapter 4 "Keypad operation procedure".
4
Cooling fan
See Chapter 6 "Fault tracking" for detailed information.
5
Product nameplate
See section 2.3 "Product nameplate" for detailed
information.
6
Ventilation hole
cover
Optional. Using the ventilation hole cover can enhance
the protection rating but also increase the internal
temperature, which requires derating.
7
Control terminals
See Chapter 3 "Installation guidelines" for detailed
information.
8
Main circuit
terminals
See Chapter 3 "Installation guidelines" for detailed
information.
9
The cable entry of
the main circuit
Fix the main circuit cables.
10
Simple nameplate
Refer to section 2.4 "Model code".
11
Bar code
The same as the bar code on the name plate.
Note: The bar code is on the keypad, which is under the
keypad.

Ecowatt®Drive K120 series Installation guidelines
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3Installation guidelines
The chapter describes the mechanical installation and electric installation of the VFD.
Only trained and qualified professionals are allowed to carry out the
operations mentioned in this chapter. Please carry out operations
according to instructions presented in chapter 1 "Safety
precautions". Ignoring these safety precautions may lead to physical
injury or death, or equipment damage.
Ensure the VFD power is disconnected before installation. If the VFD
has been powered on, disconnect the VFD and wait for at least the
time designated on the VFD.
Installation must be designed and done according to applicable local
laws and regulations. Kruger does not assume any liability
whatsoever for any installation which breaches local laws and
regulations. If recommendations given by Kruger are not followed,
the VFD may experience problems that the warranty does not cover.
3.1 Mechanical installation
3.1.1 Installation environment
Installation environment is essential for the VFD to operate at its best in the long run.
Environment
Condition
Installation
site
Indoors
Ambient
temperature
-10°C–+50°C, and the temperature changing rate is less than
0.5°C/minute.
When the ambient temperature exceeds 40°C, derate 1% for
every additional 1°C.
It is not recommended to use the VFD when the ambient
temperature is above 50°C.
In order to improve the reliability of the device, do not use the
VFD if the ambient temperature changes frequently.
Please provide cooling fan or air conditioner to control the
internal ambient temperature below the required one if the
VFD is used in an enclosed space such as in the control cabinet.
When the temperature is too low, if the VFD needs to restart to
run after a long stop, it is necessary to provide an external
heating device to increase the internal temperature; otherwise,
damage to the devices may occur.