Veichi SI21 User manual

SI21 Solar Pump VFD Manual
I
Contents
Chapter 1 Safety Requirement and Cautions...........................................................................1
1.1 Safety Definition..........................................................................................................1
1.2 Safety Requirements and Cautions............................................................................1
1.3 Cautions in Using.........................................................................................................3
1.4 Technical Specification................................................................................................4
1.5 Cautions in Disposal....................................................................................................4
Chapter 2 Installation and Wiring ............................................................................................6
2.1 Dimension of VFD .......................................................................................................6
2.2 Solar Pump Controller Wiring...................................................................................6
Chapter 3 Keyboard layout and functions specification .......................................................10
Chapter 4 Fault Diagnosis and Solution .................................................................................12
Chapter 5 Parameters List.......................................................................................................16
Chapter 6 Operation Guidance ...............................................................................................36
6.1 Asynchronous Motor Pump Drive Operation Guidance........................................36
6.2 Synchronous Motor Pump Drive Operation Guidance..........................................36
6.3 PV Water Pump Features.........................................................................................37

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Chapter 1 Safety Requirement and Cautions
To ensure safety of your health, equipment and property, please read this chapter carefully before using the
frequency VFD and act in compliance with the instructions when installing, debugging, running and overhauling
the frequency VFD.
1.1 Safety Definition
Danger: it will cause danger of serious injuries and even death while operating against the rules.
Caution: it will cause danger of light injuries or equipment destruction while operating against the rules.
Note: some information is useful while operating and use frequency VFD.
1.2 Safety Requirements and Cautions
●Before Installation
Danger
1. Only qualified personnel can operate the equipment. Before operating, be sure to carefully read the manual
about safety, installation, operation and maintenance. The safe operation depends on the proper processes of
choosing models, carrying, installation, operation and maintenance.
Danger
1. Don’t use the damaged or incomplete frequency VFDs; Otherwise, there is risk of injury.
●Installation
Danger
1. Please install the frequency VFD on metal or other nonflammable material, and keep it away from the
combustible material. Otherwise there is danger of fire.
2. No unauthorized modification to the frequency VFD; Otherwise there is danger of damaged.
3. Normal frequency VFD, which is not explosion-proof, can not be installed where with explosive gas or dust;
Otherwise there is danger of explosion.
Attention
1. When two frequency VFDs are installed in the same control cabinet, pleas pay attention to the installing place
to guarantee the effective heat dissipation.
2. When carrying the frequency VFD, ease support its bottom.
●Wiring
Danger

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1. Wire is connected only when the main circuit is cut off, otherwise there is a danger of shock.
2. Wire is connected by professional person only. Otherwise there is a danger of shock.
3. Earth must be reliable. Otherwise there is a danger of shock.
4. AC power supply should not be connected with output ports U, V, W, otherwise there is a danger of damage to
frequency VFD.
5. No drop of bolt, spacer, metal stick, conducting wire or other things into the inner of frequency VFD;
Otherwise there is a danger of fire or damage to frequency VFD.
Attention
1. If the damage to frequency VFD or other equipment is caused by improper wiring and utilization or
unauthorized alteration, the user should shoulder all responsibilities.
2. Please make sure all wirings meet EMC requirement and satisfy safety standard in the local area; Please refer
to recommendations in this manual or national standards of wire diameter to avoid accidents.
3. Static electricity on human body would seriously damage internal MOS transistor, etc. No touch the printed
circuit boards, IGBT or other internal devices without anti-static measure, otherwise it will cause the
malfunction of frequency VFD.
4. Please don't connect phase shifter capacitance or LC/RC noise filter to the output circuit of frequency VFD;
Otherwise it will damage the frequency VFD.
5. Please don't connect the magnetic switch or magnetic contactor to the output circuit of frequency VFD; When
frequency VFD is in the operation with load, magnetic switch or magnetic contactor can make VFD
over-current protection function act. It will damage frequency VFD seriously.
6. Please don't disassemble the panel cover, it only needs to disassemble the terminal cover when wiring.
7. It is forbidden to do any pressure test on frequency VFD, otherwise it will damage the frequency VFD.
●Before Electrification
Danger
1. Please make sure that voltage grade of power supply is consistent with frequency VFD's voltage and then
check whether the wiring is correct and firm, and whether there is short circuit in peripheral equipment's
circuit. Otherwise it will damage frequency VFD and other equipment.
2. Before the frequency VFD is connected to the input power supply, make sure that the cover has been well
fixed. Otherwise it will cause electric shock.
3. For the frequency VFDs whose storage time is over 1 year, when electrification, the voltage should be raised
by booster from low to high. Otherwise it will damage the frequency VFD.
Attention
1. Check if all periphery fittings are wired properly according to the handbook; Otherwise it will cause accidents.
●After Electrification
Danger
1. After electrified, it is forbidden to open the cover, make wiring, and check up; Otherwise, it will cause the
danger of electric shock.
2. After electrified, it is forbidden to contact internal wiring board and its parts. Otherwise it will cause the

SI21 Solar Pump VFD Manual
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danger of electric shock.
3. Do not operate or touch frequency VFD with wet hand. Otherwise there is danger of damage to frequency
VFD and electric shock.
Attention
1. Please set the parameter of frequency VFD cautiously; Otherwise it will damage equipment.
●Operation
Danger
1. Before running, please check and confirm the application range of the machine and equipment once more;
Otherwise it will cause accidents.
2. Please don't touch the cooling fan and braking resistance to check the temperature; Otherwise there is a danger
of getting burn.
3. Unprofessional workers are banned to check the signals in the running stage; Otherwise it will cause injuries
and damage the equipment.
Attention
1. Please don't turn off the equipment by switching off power; Please cut off the power supply after the electric
machine stops running; Otherwise it will damage the frequency VFD.
2. Please avoid anything dropping into the equipment when the frequency VFD is running; Otherwise it will
cause electric shock.
●Maintenance
Danger
1. Please don't maintain and repair the equipment with electric; Otherwise it will cause electric shock.
2. Before maintaining and repairing the frequency VFD, please make sure the indicator lights of power supply
have completely turned off; Otherwise it may cause electric shock and damage the frequency VFD.
3. Persons who have not passed specialized train are not allowed to conduct the frequency VFD maintenance;
Otherwise it may cause electric shock and damage the frequency VFD.
1.3 Cautions in Using
1. In application of this series frequency VFD, you have to confirm all machine insulation to prevent damage to
the equipment. Moreover, when the motor working in tough environment, please periodic inspect the electrical
insulation to ensure the safety of the system work.
2. If the motor adapter is not consistent with frequency VFD's rating current (The rating current of the motor is
far smaller than that of frequency VFD), please adjust the protective value to ensure safe running.
3. In occasions such as load raises, usually there is negative torque and frequency VFD breaks off for
over-current or over-voltage. In this case, you should consider choosing the matching brake unit.
4. Frequency VFD, in a certain output frequency range, can meet the mechanical resonance of the load

SI21 Solar Pump VFD Manual
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equipment. To avoid it, you can set up jumping frequency.
5. As output voltage of the VFD is pulse-wave type, if there is capacity which can improve power factor or
pressure-sensitive resistance which used for thunder-proof in the voltage output side, the frequency VFD will
break off or its parts will be damaged, so it is necessary to dismantle them. Moreover, it is proposed not install
switch parts like air switch and contactor (if it is necessary to install switch on output side, please make sure
the output electricity of frequency VFD is zero when the switch is working)
6. At over 1,000 meters altitude, the VFD’s heat dissipation function worsened due to the thin air, it is necessary
to use less.
7. The VFD output voltage is pulse wave type. If using digital multi-meter measurement, deviation of the reading
will be great.And the deviation is different by using different type of digital multi-meter. Under normal
circumstances, while RMS 380V, digital multi-meter reading is around 450V.
8. Solar panel can be connected in the series or parallel. For rated voltage 380V controller, we suggest working
voltage between 480V and 560V while MPPT. What means the solar panel open circuit voltage should be
between 600V and 700V.
1.4 Technical Specification
Solar pump
VFD
power(kW)
Pump
Max solar
power
input
(kW)
Max DC
input
voltage V
Recommend
Voc voltage
(V)
Rated
output
current
(A)
Output
frequenc
y(Hz)
Rated
power
(kW)
Rated
voltage
(V)
SI21-D1 series, 60VDC～400VDC input, 3 phase 110VAC～230VAC output
0.75
0.75
110
1.0
400
175～380
7A
0～600
1.5
1.5
110
1.95
400
175～380
10A
0～600
SI21-D3 series, 150VDC～450VDC input, 3 phase 220VAC～240VAC output
0.75
0.75
220
1.0
450
360～430
4A
0～600
1.5
1.5
220
1.95
450
360～430
7A
0～600
2.2
2.2
220
2.86
450
360～430
10A
0～600
SI21-D5 series, 250VDC～780VDC input, 3 phase 380VAC～460VAC output
0.75
0.75
380
1.0
780
620～750
3.0
0～600
1.5
1.5
380
2.2
780
620～750
4.0
0～600
2.2
2.2
380
3.3
780
620～750
5.0
0～600
4
4
380
5.6
780
620～750
9.5
0～600
5.5
5.5
380
8
780
620～750
13
0～600
7.5
7.5
380
11.25
780
620～750
17
0～600
11
11
380
16.5
780
620～750
25
0～600
15
15
380
22.5
780
620～750
32
0～600
18
18
380
27
780
620～750
38
0～600
22
22
380
33
780
620～750
45
0～600
1.5 Cautions in Disposal
When you dispose frequency VFD, please pay attention to:
1. Electrolytic capacitor: the electrolytic capacitor of main circuit or the printing plate may explode when they are
burned.
2. Plastic: plastic incineration may generate toxic gases.

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3. Dispose method: please dispose as industrial waste.

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Chapter 2 Installation and Wiring
2.1 Dimension of VFD
● Overall Dimension of VFD (Plastic)
W1
H2
W2
W2
H1 H
D1
D
H4
H3
W3
W
Installation Aperture
0.4kW-5.5kW Installation Dimension Drawing
Model
Dimension (mm)
Positive mounting
dimensions (mm)
Side mounting
dimensions
(mm)
Mo
unt
ing
hol
e
dia
met
er
W
H
H1
D
D1
W
1
W2
H2
W
3
H3
H4
SI21-D3-R04G-A
65
177
155
148
142
45
10
168
19
6.5
167
3-M
4
SI21-D3-R75G-A
SI21-D3-R75G-A-V
C
SI21-D3-1R5G-A
75
202
180
163
157
55
10
193
19
6.5
192
3-M
4
SI21-D3-2R2G-A
SI21-D3-1R5G-A-V
C
SI21-D3-2R2G-A-V
C
SI21-D5-R75G-A
65
177
155
148
142
45
10
168
19
6.5
167
3-M
4
SI21-D5-1R5G-A
SI21-D5-2R2G-A
SI21-D5-004G-A
75
202
180
163
157
55
10
193
19
6.5
192
3-M

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SI21-D5-5R5G-A
4
W1
WW2
H2 H1
D
D1
H
Installation hole
diameter
7.5kW-22kW Installation Dimension Drawing
Model
Dimension (mm)
Positive
mounting
dimensions
(mm)
Side mounting
dimensions
(mm)
Mo
unt
ing
hol
e
dia
met
er
W
H
H1
D
D1
W
1
W2
H2
W
3
H3
H4
SI21-D5-7R5G-A
130
320
286
161
158
105
12.5
302
一
一
一
M5
SI21-D5-011G-A
SI21-D5-015G-A
170
342.5
303.5
183
180
145
12.5
326.5
一
一
一
M6
SI21-D5-018G-A
SI21-D5-022G-A
2.2 Solar Pump Controller Wiring

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● Standard Connection Diagram
Note2
Note:Function description in brackets is
factory default
Analog monitoring
signal output
TA
TB
TC
+24V
Y
Shielded cable (the
end close to VFD
grounding)
_
mA
20
10
0
-
+
V
W
U
P
~
Shielded cable or armoured cable
(the end close to VFD grounding)
E(The grounding resistance
is less than 10ohms)
W
V
U
Output Rector
+10V
Frequency control input
GND
AI
Shielded cable (the end close to
VFD grounding)
Multi function contact input
(Water full detection reset)
(Water full detection alarm)
(Reverse)
(Forward)
GND
X3
X4
X1
X2
PB
Solar pump VFD
S
T
R
GND
A0
Coil
COM
Passive contact
output
AC220V
AC0V
Coil
MAX Output Of Contact:
3A/240VAC
5A/30VDC
1.MAX Output of +24V Port:DC24V/100mA
Note:When output type of AO port as
frequency and Voltage,
Maximum Output:2mA
2.Inner resistance of AI1/AI2 Port：100kΩ
1.MAX Output of +10V port :50mA
Note:
2.Max Output of Y Port:DC24V/50mA
Note:
represent control circuit terminals.
represent main circuit terminals;
Legend: 1.Symbol
Twisted pair shielded
cable (near the
inverter end
grounded)
P
+24V
Analog Voltage/Current quantity input
A+
B-
RS485 Differential
Communication 120Ω
Open collector(OC)
state output
2.Symbol
PV modules
DC breaker
S3
I
U
AI S4 S1
US2
I
Note: When connect solar panel, please select R/T terminals.
● Auxiliary Terminal Output Capacity
Terminal
Function Definition
Max Output
+10V
10V auxiliary power supply output, constitutes loop with
GND.
50mA
AO
Analog monitor output, constitutes loop with GND.
Max output 2mAas
frequency, voltage signal
+24V
24V auxiliary power supply output, constitutes loop with
COM.
100mA
Y
Collector open circuit output; can set the action-object by
program.
DC24V/50mA
TA/TB/TC
Passive connector output; can set the action-object by
program.
3A/240VAC 5A/30VDC

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●Function Specification of Switch Terminals
Bit
Select
location
Function Description
S1
ON
Enable AO output 0V～10V
OFF
DisablingAO voltage output
S2
ON
Enable AO output 0mA～20mA or 4mA～20mA
OFF
DisablingAO current output
S3
ON
RS485 communication access 120Ω termination resistor
OFF
RS485 communication disconnects 120Ω termination resistor
S4
I
AI input 0mA～20mA or 4mA～20mA
U
AI input 0V～10V

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Chapter 3 Keyboard layout and functions specification
●Keyboard operator appearance
● Key function
Symbol
Defination
Function Description
Menu
Enter the function menu interface during standby or running; press this button
to exit the modification when the parameter is modified; press the button (1
second) during standby or running to enter the status interface directly.
Set/shift
Set function:After modifying the value, press this key to confirm the modified
value.
Shift function: long press this button (1 second) to move the operation bit,
long press is not loose, then cyclic shift.
Up/Down
The up key increases the operation value and the down key decreases the
operation value.
Run
When the run/stop is controlled by the keyboard, press this button to turn the
VFD forward. The status indicator is always on during forward run, and the
status indicator is flashing during reverse run.
Stop/Reset
When the command given channel is keyboard control, press this key to stop
the VFD; the parameter [F04.08] can be used to define whether other
command channels are valid; the VFD resets when pressing the key in fault
status.

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●Indicator Defination
Name
Status
Defination
Unit
indicator
Hz
Flash/Light on
Indicates the frequency unit
A
Light on
Represents current unit
V
Light on
Represents voltage unit
RPM
Light on
Express unit of speed
%
Flash/Light on
Indicates the percentage unit
Status
Indicator
RUN
Light on
The VFD is running forward
RUN
Flash
The VFD is running reverse
RUN
Light off
VFD is shutdown

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Chapter 4 Fault Diagnosis and Solution
This chapter describes the VFD fault, alerts, and operation of the failure on the VFD, the display information
on VFD and countermeasures.
Keypad
display
Fault
code
Fault type
Possibility reason
Troubleshooting
E.LU2
Under
voltage at
runs
●Power voltage too low
●DC main contactor don’t
close
●Check input power to solve
●Ask support
E.oU1
Over voltage
at
acceleration
●Power voltage fluctuation
over limit
●Too start rotating motor
●Check power grid
●Restart until motor is stop
completely, or set [F1.00] set for
1 or 2
E.oU2
Over voltage
during
deceleration
●Deceleration time too
small
●The driving load too heavy
●Power voltage fluctuation
over limit
●Prolong deceleration time
●Reduce the load, or select
bigger capacitor drive, or connect
braking unit
●Check input power
E.oU3
Overvoltage
at
constant
speed
●The input voltage is too
high.
●An external force drives
the motor during
deceleration
●Adjust the voltage to
normal range.
●Cancel the external force or
install the braking resistor.
E.oU4
Over voltage
at stop
●Voltage fluctuate above
limit
●Check the input voltage
E.oC1
Over current
during
acceleration
●Acceleration time is too
short
●To start rotating motor
●V/F setting not correct or
torque boost setting too big
●Solar drive capacitor is too
small
●Prolong acceleration time
●Restart motor when it on still,
or set F1.00 for 1 or 2.
●Reset V/f curve or torque boost
setting
E.oC2
Over current
during
deceleration
●The output circuit is
grounded or short circuited.
●Motor auto-tuning is not
performed.
●The acceleration time is
too short.
●Manual torque boost or
V/F curve is not appropriate.
●The voltage is too low.
●The startup operation is
●Eliminate external faults.
●Perform the motor auto tuning.
●Increase the acceleration time.
●Adjust the manual torque boost
or V/F curve.
●Adjust the voltage to
normal range.
●Select rotational speed tracking
restart or start the motor after it
stops.

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13
performed on the rotating
motor.
●A sudden load is added
during
acceleration.
●The AC drive model is of
too small power class.
●Remove the added load.
●Select an AC drive of higher
power class.
E.oC3
Over current
at constant
speed
●The output circuit is
grounded or short circuited.
●Motor auto-tuning is not
performed.
●The voltage is too low.
●Asudden load is added
during operation.
●The AC drive model is of
too small power class
●Eliminate external faults.
●Perform the motor auto tuning.
●Adjust the voltage to normal
range.
●Remove the added load.
●Select an AC drive of higher
power class.
E.oL1
Motor
overload
●Boost torque is too big
under VF control
●ACC. and DEC. time is too
short
●Motor parameters setting is
improperly
●Restart motor which in
counter rotate
●The grid voltage is too
lower
●Load is too big or motor
block load
●AC drive selected is too
load
●Reduce boost torque
●Increase the ACC./DEC. time
●Reset motor parameters
●Reduce current limit and adopt
speed tracking
●Check grid voltage
●Check load condition
●Change bigger power AC drive
E.oL2
AC drive
overload
●Boost torque is too big
under VF control
●ACC. and DEC. time is too
short
●Motor parameters setting is
improperly
●Restart motor which in
counter rotate
●The grid voltage is too
lower
●Load is too big or motor
block load
●Reduce boost torque
●increase the ACC./DEC. time
●reset motor parameters
●Reduce current limit and adopt
speed tracking
●Too check grid voltage
●Too check load
●change bigger power AC drive

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14
●AC drive selected is too
load
E.SC
System
abnormal
●Deceleration is too short
●Short circuit of solar drive
output or phase output short
circuit to ground
● Module damage
● EMC interface
●Prolong acceleration time
●To check peripheral equipment
●Ask to support
●Check the wiring layout, cable
ground
E.oH1
VFD
over-heat
●Temperature is too high.
●Air channel is blocked.
●Fan connection parts is
loose.
●Fan is damaged.
●Temperature detection
circuit fault
●Make the environment meet the
requirement.
●Clear the air channel.
●Check and reconnect the wire
●Change the same new fan.
●Seek support from factory.
E.TE1
Motor static
detection
fault
●Detection overtime
●Start static detection while
motor is running.
●Capacitance difference is
too big between motor and
VFD.
●Motor parameter setting
mistake.
●Check motor connection wire.
●Detect after motor stopping
totally.
●Change VFD model.
●Reset parameter according to
nameplate.
E.TE2
Motor
rotation
detection
fault
●Detect while motor is
running.
●Detect with load.
●Detection overtime
●Capacitance difference is
too big between motor and
VFD.
●Motor parameter setting
mistake.
●Detect after motor stop totally.
●Re-detect without load.
●Check motor connection wire.
●Change VFD model.
●Reset parameter according to
nameplate.
E.EEP
Memory
fault
●Electromagnetic disturb in
memory period.
●EEPROM damage.
●Resume load and save.
●Seek support from factory.
LiFE
Reserved
E.iLF
Input phase
loss
●3-phase input power open
phase.
●Check 3-phase power supply
and the phase.

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15
●Check 3-phase power supply
wiring.
E.oLF
Output phase
loss
●3-phase output power open
phase
●Check 3-phase output voltage
and current.
●Check wiring.
E.Gnd
Output earth
terminal
short circuit.
●Check wiring and
insulation.
●Output earth
E.HA
L
Current
detection
fault
●Detect circuit fault.
●Phase imbalance
●Seek support from factory
●Check motor and wiring.
Rs485co
mmunicat
ion fault
●Unsuitable
baud rate
setting.
●wire
breaks.
●Set suitable baud rate
setting.
●Check communication
wire.
●Make sure right
communication format.
●RS485communication fault
A.LU1
A.LU1
Bus voltage
too low
Bus voltage too low
Check if the AC or DC voltage is
sufficient

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16
Chapter 5 Parameters List
This chapter just provides function parameter table. Specifications refer to SI21 technical manual.
●Environment setting
Parameter
(address)
Function
Description
Range of settings and definition
Factory
default
(setting range)
Notes
F00.03(0x0003
)
Initialization
V/F SVC
Set the VFD initialization method.
0: Not initialized
11: Select the set value according to the
purpose to carry out the parameters (excluding
the motor parameters)
22: All parameters are initialized
33: Clear the fault record
0
(0～33)
F00.04(0x0004
)
Keyboard
parameter copy
V/F SVC
0: No function
11: Upload parameters to the keyboard
22: Download parameters to the VFD
0
(0～9999)
F00.05(0x0005
)
User password
V/F SVC
Used to set the user password.
0
(0～65355)
●Basic parameters
Parameter
(address)
Function
Description
Range of settings and definition
Factory
default
(setting range)
Notes
F01.00(0x0100
)
Motor 1
control mode
V/F SVC
The way the motor is controlled.
0: AM-VF; VF control
1: AM-SVC; Open loop vector control, current
closed loop control
0
(0～1)
S/T2
models
only
support
VF
control
F01.01(0x0101
)
Run command
channel
V/F SVC
Used to select the channel that the drive
accepts the run and stop commands and the
direction of travel.
0: Keyboard control (external keyboard
priority)
1: Terminal control
2: RS485 communication control
3: Reserved
0
(0～3)
F01.02(0x0102
)
Frequency
reference
source channel
V/F SVC
The frequency converter sets the given source
of the frequency.
0
(0～11)

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17
A
0: Keyboard digital given frequency
1: Keyboard analog potentiometer given
2: Current/voltage analog AI given
3: Reserved
4: Reserved
5: Terminal pulse PUL given
6: RS485 communication given
7: Terminal UP/DW control
8: PID control given
9: Program Control (PLC) given
10: Option card
11: Multi-speed speed given
F01.09(0x0109
)
Keyboard
digital given
frequency
V/F SVC
Used to set and modify the keyboard digital
setting frequency.
50.00Hz
(0.00Hz～
upper limit
frequency
setting)
F01.10(0x010
A)
Maximum
frequency
V/F SVC
The maximum frequency that the frequency
converter can set.
50.00Hz
(upper limit
frequency～
600.00Hz)
F01.12(0x010C
)
Upper limit
frequency
digital setting
V/F SVC
The upper line frequency is given when F01.11
is set to 0.
0.00Hz
(0.00Hz～
upper limit
frequency
digital setting)
F01.13(0x010
D)
Lower limit
frequency
V/F SVC
Given a lower frequency limit, the given
frequency is limited.
0.00Hz
(0.00Hz～
upper limit
frequency
digital setting)
F01.22(0x0116
)
Acceleration
time 1
V/F SVC
The time required for the output frequency to
accelerate from 0.00 Hz to the time reference
frequency.
1s～65000s(F01.21 = 0)
0.1s～6500.0s(F01.21 = 1)
0.01s～650.00s(F01.21 = 2)
Model setting
(0.01s～
650.00s)
F01.23(0x0117
)
Deceleration
time 1
V/F SVC
The time it takes for the output frequency to
decelerate from the time reference frequency
to 0.00 Hz.
Model setting
(0.01s～
650.00s)

SI21 Solar Pump VFD Manual
18
F01.40(0x0128
)
Carrier
frequency
V/F SVC
Used to set the switching frequency of the
VFD IGBT.
4.0kHz
(1.0kHz～
16.0kHz)