Veichi SI23 series User manual

SI23 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 .............................................................................4
1.4 Technical Specification .....................................................................4
1.5 Cautions in Disposal.........................................................................8
Chapter 2 Installation and Wiring..............................................................................9
2.1 Dimension of VFD .......................................................................................9
2.2 Solar Pump Controller Wiring....................................................................14
2.3 Recommended main circuit components specification..............................15
2.4 Main circuit wiring of solar VFD.................................................................16
Chapter 3 Keyboard layout and functions specification ..........................................18
Chapter 4 Fault Diagnosis and Solution..................................................................19
Chapter 5 Parameters List ......................................................................................24
Function code.........................................................................................................41
Function name........................................................................................................41
Setting range and definition....................................................................................41
Default setting ........................................................................................................41
Chapter 6 Operation Guidance................................................................................43
6.1 Asynchronous Motor Pump Drive Operation Guidance..............................43
6.2 Synchronous Motor Pump Drive Operation Guidance................................43
6.3 PV Water Pump Features...........................................................................44

SI23 Solar Pump VFD Manual
1
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.The solar pump shall be installed in restricted access cabinet or area and is accessed by qualified electric service
personnel only.
Danger
1.To reduce the risk of electric shock, do not perform any servicing other than that specified in the operating instructions
unless you are qualified to do so.
●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
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.

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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 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.

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3
●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.
●Installation Instruction in IP54 Cabinet
Note: 1. This VFD should be installed in IP54 cabinet by the professional engineers as the above pictures.
2. The whole controller should be maintained regularly by the professional engineers or authorized persons.

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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 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 specification
Items
specifications
Power
input
Voltage,
frequency
DC Input: D5:250VDC～800VDC
Output
Output voltage
Output under rated condition: 3 phase, 0Vac～380Vac, deviation<10%
Output frequency
range
G/P type: rated output frequency 50Hz (0~600Hz frequency conversion)
Output frequency
accuracy
Max frequency ± 0.5%
Overload capacity
G type: 150% rated current/1 min, 180% rated current/10s, 200% rated current/0.5s
P type: 120% rated current/1 min, 140% rated current/10s, 150% rated current/0.5s
Main
control
performance
Motor type
Three-phase asynchronous motor; Permanent magnet synchronous motor (sine
wave)
Control mode
V/F control, Open loop vector control, Closed loop vector control
Modulation
Optimizing Space Voltage Vector PWM Modulation
Carrier frequency
1.0kHz～16.0kHz

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Speed control
range
VC without PG: rated load 1:100; VC with PG: rated load 1:1000
Steady speed
accuracy
VC without PG: ≤2% rated synchronized speed; VC with PG: ≤0.05% rated
synchronized speed
Starting torque
VC without PG: 150% rated torque at 0.5Hz; VC with PG: 0Hz, 200% rated torque
at 0Hz
Torque response
VC without PG:<20ms; VC with PG: <10ms
Frequency
accuracy
Digital setting: max frequency× ± 0.01%; Analog setting: max frequency× ± 0.2%
Frequency
resolution
Digital setting: 0.01Hz; Analog setting: max frequency× 0.05%
Basic
functions
Torque control
Torque setting calculation, torque mode speed limit
DC braking
capacity
Starting frequency:0.00Hz～50.00Hz; Braking time:0.0s～60.0s; Braking
current:0.0～150.0% rated current
Torque boost
capacity
Automatic torque boost 0.0%～100.0%; Manual torque boost 0.0%～30.0%
V/F curve
Four modes: linear torque characteristic curve, self-set V/F curve, torque reduction
characteristic curve (1.1 to 2.0 power), square V/F curve
Acceleration/Decel
eration curve
2 modes: linear Acceleration/Deceleration and S curve Acceleration/Deceleration. 4
sets of ACC/DEC, time unit 0.01s selectable, longest time: 650.00s.
Rated output
voltage
Using the power supply voltage compensation function, the rated voltage of the
motor is 100%, which can be set within the range of 50 to 100% (the output cannot
exceed the input voltage).
Voltage
auto-adjustment
While power supply voltage fluctuates, it can auto-keep constant output voltage.
Auto
energy-saving
running
While under V/F control mode, according to load situation, auto-optimize output
voltage to save energy.
Auto-limit current
Auto-limit the current while running to prevent over current break trouble.
Instant power off
treatment
Uninterrupted operation through bus voltage control during instantaneous power loss.
Standard functions
PID control, speed track, power off restart, jump frequency, upper/lower frequency
limit control, program operation, multi- speed, RS485, analog output, frequency
impulse output.
Frequency setting
channels
Keyboard digital setting, Analog voltage/current terminal AI1, Analog voltage/current
terminal AI2, Communication given and multi-channel terminal selection, Main and
auxiliary channel combination, expansion card, supporting different modes switch.
Feedback input
channel
Voltage/Current Terminal AI1, Voltage/Current Terminal AI12, Communication given,
Low-speed pulse input PUL, extension card.
Running command
channel
Operation panel given, external terminal given, communication given, expansion
card given.
Input command
signal
Start, stop, FWD/REV, JOG, multi-step speed, free stop, reset, ACC/DEC time
selection, frequency given channel selection, external fault alarm.
External output
signal
1 relay output, 1 collector output, 1 AO output: 0V～10V output or 4mA～20mA
output.
Protection function
Overvoltage, under-voltage, current limit, over-current, overload, electric thermal
relay, overheat, overvoltage stall, data protection, rapid speed protection,
input/output phase failure protection.
Keyboard
display
LED display
Built-in keyboard: single line 5- digital tube
display
monitor 1 VFD status quantity
External keyboard: double line 5- digital tube
display
Monitor 2 VFD status quantities

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Parameter copy
Upload and download function code information of the VFD for fast parameter
copying.
Status monitor
Output frequency, given frequency, output current, input voltage, output voltage,
motor speed, PID feedback, PID given value, module temperature etc. monitor
parameters.
Error alarm
Over-voltage, under-voltage, over-current, short circuit, phase failure, overload,
overheat, overvoltage stall, current limit, or Data protection compromised, current
fault health, historical fault record .
Environment
Install place
The altitude is less than 1000 meters, and the derating is more than 1000 meters.
The derating is 1% for every 100 meters. No condensation, icing, rain, snow, hail,
etc., solar radiation is less than 700W/m², air pressure 70 kPa～106kPa.
Temperature,
humidity
-10°C～+50° C, derating can be used above 40 ° C, the maximum temperature is
60 ° C (no-load operation), 5%~95%RH(no condensation)
5% to 95% RH (no condensation).
Vibration
9Hz～200Hz,5.9m/s²(0.6G)
5%—95%RH (no condensation)
Operation
temperature
-10℃～+50℃
Storage
temperature
-30℃～+60℃
Installation
Wall hanging
Application
Indoor control system.
Over voltage
category
OVC II
Pollution
degree
PD 2
Protection class
Class I
Ingress Protection
IP20
Cooling method
Forced air cooling
Note：The solar pump vfd is intended for installation within a closed electrical operating area.
Model Naming
SI23 - D5 - 004 G -A
Product Series
SI Solar Pump VFD
23 Series No.
Type
D1 DC156V,suitable for
driving AC110V pump
D3 DC311V,suitable for
driving AC220V pump
D5 DC540V,suitable for
driving AC380V pump
T3 DC540V,suitable for
driving AC380V pump
Power
Code Suitable
Pump
004 0.75kw
5R5 1.5kw
7R5 2.2kw
Type
Code Suitable
Pump
GHeavy
Load
PLight
Load
Logo
AVEICHI Logo
Blank Logo

SI23 Solar Pump VFD Manual
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System 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
frequency
(Hz)
Rated
power
(kW)
Rated
voltage
(V)
SI23-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
SI23-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
4
4
220
5.4
450
360~430
16A
0-600
5.5
5.5
220
8
450
360~430
20
0-600
7.5
7.5
220
10
450
360~430
30
0-600
11
11
220
14.3
450
360~430
42
0-600
15
15
220
19.5
450
360~430
55
0-600
18.5
18.5
220
23.4
450
360~430
70
0-600
22
22
220
28.6
450
360~430
80
0-600
30
30
220
39
450
360~430
110
0-600
37
37
220
48.1
450
360~430
130
0-600
45
45
220
58.5
450
360~430
160
0-600
55
55
220
71.5
450
360~430
200
0-600
SI23-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
6.0
0-600
4
4
380
5.6
780
620～750
10
0-600
5.5
5.5
380
8
780
620～750
13
0-600
7.5
7.5
380
10
780
620～750
17
0-600
11
11
380
14.3
780
620～750
25
0-600
15
15
380
19.5
780
620～750
32
0-600
18.5
18.5
380
23.4
780
620～750
38
0-600
22
22
380
28.6
780
620～750
45
0-600
30
30
380
39
780
620～750
60
0-600
SI23-T3 series,350VDC-780VDC input,3phase 380VAC-440VAC output
37
37
380
48.1
780
620～750
75
0-600
45
45
380
58.5
780
620～750
90
0-600
55
55
380
71.5
780
620～750
110
0-600
75
75
380
97.5
780
620～750
150
0-600
90
90
380
121.5
780
620～750
180
0-600
110
110
380
148.5
780
620～750
210
0-600
132
132
380
178.2
780
620～750
250
0-600
160
160
380
216
780
620～750
310
0-600
185
185
380
249.75
780
620～750
340
0-600
200
200
380
270
780
620～750
380
0-600
220
220
380
297
780
620～750
415
0-600
250
250
380
337.5
780
620～750
470
0-600

SI23 Solar Pump VFD Manual
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280
280
380
378
780
620～750
510
0-600
315
315
380
425.25
780
620～750
600
0-600
355
355
380
479.25
780
620～750
670
0-600
400
400
380
540
780
620～750
750
0-600
450
450
380
607.5
780
620～750
810
0-600
500
500
380
675
780
620～750
860
0-600
560
560
380
756
780
620～750
990
0-600
630
630
380
850.5
780
620～750
1100
0-600
710
710
380
958.5
780
620～750
1260
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.
3. Dispose method: please dispose as industrial waste.

SI23 Solar Pump VFD Manual
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Chapter 2 Installation and Wiring
2.1 Dimension of VFD
Overall Dimension of VFD (Plastic)
WD
D1
H
W1
W2
A
B
H2
Installation Diameter
H1
MODEL
Overall Dimension(mm)
Installation Dimension(mm)
Aperture
W
H
H1
D
D1
W1
W2
H2
A
B
SI23-D3-R75G-A
76
200
192
155
149
65
65
193
5.5
4
ф3-M4
SI23-D3-1R5G-A
SI23-D3-2R2G-A
100
242
231
155
149
84
86.5
231.5
8
5.5
ф3-M4
SI23-D3-004G-A
SI23-D5-R75G-A
76
200
192
155
149
65
65
193
5.5
4
ф3-M4
SI23-D5-1R5G-A
SI23-D5-2R2G-A
SI23-D5-004G-A
100
242
231
155
149
84
86.5
231.5
8
5.5
ф3-M4
SI23-D5-5R5G-A
SI23-D5-7R5P-A
SI23-D5-7R5G-A
116
320
307.5
175
169
98
100
307.5
9
6
ф3-M5
SI23-D5-011P-A
SI23-D5-011G-A
SI23-D5-015P-A

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W
HH1
D
D1 W1
W2
B
H2
Installation Diameter
MODEL
Overall Dimension(mm)
Installation Dimension(mm)
Aperture
W
H
H1
D
D1
W1
W2
H2
B
SI23-D5-015G-A
142
383
372
225
219
125
100
372
6
ф4-M5
SI23-D5-018P-A
SI23-D5-018G-A
SI23-D5-022P-A
SI23-D5-022G-A
SI23-D5-030P-A
SI23-D5-030G-A
172
430
/
255
219
150
150
416.5
7.5
ф4-M5
SI23-T3-037P-A
SI23-T3-037G-A
SI23-T3-045P-A

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Overall Dimension of VFD (Steel)
W
H
D
H1
W1
H2
Installation Diameter
MODEL
Overall Dimension(mm)
Installation
Dimension(mm)
Aperture
W
H
H1
D
W1
H2
SI23-T3-045G-A
240
560
535
310
176
544
ф4-M6
SI23-T3-055P-A
SI23-T3-055G-A
SI23-T3-075P-A
SI23-T3-075G-A
SI23-T3-090P-A
SI23-T3-090G-A
270
638
580
350
195
615
ф4-M8
SI23-T3-110P-A
SI23-T3-110G-A
SI23-T3-132P-A
SI23-T3-132G-A
350
738
680
405
220
715
ф4-M8
SI23-T3-160P-A
SI23-T3-160G-A
SI23-T3-185P-A
SI23-T3-185G-A
360
940
850
480
200
910
ф4-M16
SI23-T3-200P-A
SI23-T3-200G-A
SI23-T3-220P-A
SI23-T3-220G-A
SI23-T3-250P-A
SI23-T3-250G-A
370
1140
1050
545
200
1110
ф4-M16
SI23-T3-280P-A

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SI23-T3-280G-A
SI23-T3-315P-A
SI23-T3-315G-A
400
1250
1140
545
240
1213
ф4-M16
SI23-T3-355P-A
SI23-T3-355G-A
SI23-T3-400P-A
SI23-T3-400G-A
SI23-T3-450P-A
SI23-T3-450G-A
460
1400
1293
545
300
1363
ф4-M16
SI23-T3-500P-A
SI23-T3-500G-A
SI23-T3-560P-A
SI23-T3-560G-A
SI23-T3-630P-A

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Dimension of VFD (Cabinet)
W
H
W1
D1
D
H1
MODEL
Overall Dimension(mm)
Installation
Dimension(mm)
Aperture
W
H
H1
D
W1
H2
SI23-T3-630G-A
800
1900
1800
700
564
626
φ14
SI23-T3-710P-A
SI23-T3-710G-A
SI23-T3-800P-A

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2.2 Solar Pump Controller Wiring
●Standard Connection Diagram
Analog Monitoring Signal Output
TA
TB
TC
+24V
Y
_
mA
20
10
0
-
+
V
W
U
M
~
E(The grounding resistance is
less than10Ω)
W
V
U
Output Reactor
+10V
Analog Input
GND
AI1
AI2
Multiple Functional Contact Input
(REV)
(FWD) X1
X2
VFD
PV-
PV+
GND
AO1
Coil
COM
Passive Contact
Output
Coil
MAX Output:
5A/30VDC
1 +24V Max. Output:DC24V/100mA
2 Y Max. Output:DC24V/50mA
Note：
+24V
GND
Analog Voltage/Current Input 1
A+
B-
RS485 Communication 120Ω
Analog Voltage/Current Input 2
Open Collector
State Ouput
1 +10V Max.Output:50mA
Note：
PV modules
DC breaker
(Water full detection alarm)
COM
X3
(Water full detection reset) X4
(Free stop) X5
Note: 1.When connect solar panel, please connect PV+/PV-.
2.The communication interface of the PCE is considered as DVC A. The external signal communication interface is
considered as SELV. The compatibility shall be considered when the communication interfaces are connected.
●Auxiliary Terminal Output Capacity
Terminal
Function Definition
Max Output
+10V
10V auxiliary power supply output, constitutes loop with GND.
50mA
A0
Analog monitor output, constitutes loop with GND.
Max output 2mA as 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.
5A/30VDC

SI23 Solar Pump VFD Manual
15
●Function Specification of Switch Terminals
Switch Terminal
Selecting Position
Function Specification
RS485 Terminal Resistor
RS485 Communication :connect with 120Ω terminal resistor
AO-F Output- frequency
0kHz～100kHz frequency output
AO-I Output- Current
0mA～20mA current output or 4mA～20mA current output
AO-U Output- Voltage
0V～10V voltage output
AI1 Input- Current/Voltage
AI1: Input 0mA～20mA or 0V～10V
AI2 Input- Current/Voltage
AI2: Input 0mA～20mA or 0V～10V
2.3 Recommended main circuit components specification
Model
Contactor Specification
Circuit Breaker Specification
SI23-D5-R75G-A
10A
10A
SI23-D5-1R5G-A
10A
10A
SI23-D5-2R2G-A
16A
15A
SI23-D5-004G-A
16A
20A
SI23-D5-5R5P-A
25A
20A
SI23-D5-5R5G-A
25A
20A
SI23-D5-7R5P-A
25A
30A
SI23-D5-7R5G-A
25A
30A
SI23-D5-011P-A
32A
40A
SI23-D5-011G-A
32A
40A
SI23-D5-015P-A
40A
50A
SI23-D5-015G-A
40A
50A
SI23-D5-018P-A
50A
60A
SI23-D5-018G-A
50A
60A
SI23-D5-022P-A
50A
75A
SI23-D5-022G-A
50A
75A
SI23-D5-030P-A
63A
100A
SI23-D5-030G-A
63A
100A
SI23-T3-037G-A
80A
125A
SI23-T3-045G-A
100A
150A
SI23-T3-055G-A
125A
175A
SI23-T3-075G-A
160A
200A
SI23-T3-090G-A
220A
250A
SI23-T3-110G-A
220A
300A
SI23-T3-132G-A
250A
400A
SI23-T3-160G-A
300A
500A
SI23-T3-185G-A
400A
600A
SI23-T3-200G-A
400A
700A
SI23-T3-220G-A
630A
800A
SI23-T3-250G-A
630A
1000A
SI23-T3-280G-A
630A
1200A
SI23-T3-315G-A
630A
1200A
SI23-T3-355G-A
800A
1400A

SI23 Solar Pump VFD Manual
16
SI23-T3-400G-A
1000A
1600A
SI23-T3-450G-A
1000A
2000A
SI23-T3-500G-A
1000A
2000A
SI23-T3-560G-A
1200A
2000A
SI23-T3-630G-A
1200A
2000A
SI23-T3-710G-A
1400A
2000A
2.4 Main circuit wiring of solar VFD
Model
Specifications of Screws for
Main Circuit Terminal (mm)
Recommended
Fixed Torque
(N·m)
Specifications of Recommended
Copper Core Cable (mm2)
(AWG)
SI23-D1-R75G-A
M3
0.8~1.0
2.5mm2(12)
SI23-D1-1R5G-A
M3.5
1.2~1.5
4mm2(10)
SI23-D3-R75G-A
M3
0.8~1.0
2.5mm2(12)
SI23-D3-1R5G-A
M3
0.8~1.0
2.5mm2(12)
SI23-D3-2R2G-A
M3.5
1.2~1.5
4mm2(10)
SI23-D3-004G-A
M3.5
1.2~1.5
4mm2(10)
SI23-D3-5R5G-A
M4
1.2~1.5
10mm2(7)
SI23-D3-7R5G-A
M6
4~6
16mm2(5)
SI23-D3-011G-A
M6
4~6
16mm2(5)
SI23-D3-015G-A
M6
4~6
25mm2(3)
SI23-D3-018G-A
M6
4~6
25mm2(3)
SI23-D3-022G-A
M6
4~6
25mm2(3)
SI23-D3-030G-A
M8
8~10
35mm2(2)
SI23-D3-037G-A
M8
8~10
50mm2(1)
SI23-D3-045G-A
M8
8~10
50mm2(1)
SI23-D3-055G-A
M8
8~10
70mm2(2/0)
SI23-D5-R75G-A
M3
0.8~1.0
1.5mm2(14)
SI23-D5-1R5G-A
M3
0.8~1.0
2.5mm2(12)
SI23-D5-2R2G-A
M3
0.8~1.0
2.5mm2(12)
SI23-D5-004G-A
M3.5
1.2~1.5
4mm2(10)
SI23-D5-5R5P-A
M3.5
1.2~1.5
6mm2(9)
SI23-D5-5R5G-A
M3.5
1.2~1.5
6mm2(9)
SI23-D5-7R5P-A
M4
1.2~1.5
6mm2(9)
SI23-D5-7R5G-A
M4
1.2~1.5
6mm2(9)
SI23-D5-011P-A
M4
1.2~1.5
10mm2(7)
SI23-D5-011G-A
M4
1.2~1.5
10mm2(7)
SI23-D5-015P-A
M6
4~6
10mm2(7)
SI23-D5-015G-A
M6
4~6
10mm2(7)
SI23-D5-018P-A
M6
4~6
16mm2(5)
SI23-D5-018G-A
M6
4~6
16mm2(5)
SI23-D5-022P-A
M6
4~6
16mm2(5)
SI23-D5-022G-A
M6
4~6
16mm2(5)
SI23-D5-030P-A
M6
4~6
25mm2(3)

SI23 Solar Pump VFD Manual
17
SI23-D5-030G-A
M6
4~6
25mm2(3)
SI23-T3-037G-A
M6
4~6
25mm2(3)
SI23-T3-045G-A
M8
8~10
35mm2(2)
SI23-T3-055G-A
M8
8~10
35mm2(2)
SI23-T3-075G-A
M8
8~10
50mm2(1)
SI23-T3-090G-A
M8
8~10
50mm2(1/0)
SI23-T3-110G-A
M8
8~10
70mm2(2/0)
SI23-T3-132G-A
M12
14~16
95mm2(3/0)
SI23-T3-160G-A
M12
14~16
95mm2(4/0)
SI23-T3-185G-A
M12
14~16
120mm2
SI23-T3-200G-A
M12
14~16
150mm2
SI23-T3-220G-A
M12
14~16
150mm2
SI23-T3-250G-A
M12
14~16
185mm2
SI23-T3-280G-A
M12
14~16
185mm2
SI23-T3-315G-A
M16
20~23
240mm2
SI23-T3-355G-A
M16
20~23
240mm2
SI23-T3-400G-A
M16
20~23
300mm2
SI23-T3-450G-A
M16
20~23
400mm2
SI23-T3-500G-A
M16
20~23
400mm2
SI23-T3-560G-A
M16
20~23
500mm2
SI23-T3-630G-A
M16
20~23
500mm2
SI23-T3-710G-A
M16
20~23
500mm2

SI23 Solar Pump VFD Manual
18
Chapter 3 Keyboard layout and functions specification
●Keyboard Appearance
●Key Function
Key
Name
Function
Menu key
Enter menu while standby or running. Presses this key to return while modify
parameter. While standby or running, press for 1 sec to enter condition monitoring
interface.
Confirm/Shift
key
Press to modify parameter while in menu interface. Press again to confirm after
modifying; Press this key for 1 Sec to shift digit, and long press to cycle. Each digit
flashes three time to shift to next digit.
Up/down key
Select parameter group in menu interface. Modify parameter in modify state. Modify
given frequency, ID given while at standby or monitoring state (While given frequency,
PID are set by keyboard and [F4.09] needs to be set.
Run key
While run/stop is controlled by keyboard, press this key, VFD forward runs, and the
indicator is always on. While reverse, the indicator sparks.
Stop/reset key
Machine stops if press it while run/stop is controlled by keyboard. Its efficiency range is
defined by [F4.08]. VFD resets if press it in fault state (no reset if fault is not solved).

SI23 Solar Pump VFD Manual
19
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.
Fault Information and Description in Detail
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
●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