SI21 Solar Pump VFD Manual
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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
