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1）Users are required to read the operation manual completely and carefully before installation or operation.
2） The product should be installed and pre-operated by well-trained persons
3） All the instruction marked with sign
4） For perfect operation and safety, it is prohibited that using extension cable with multi-outlet for power
connection
5） When connecting power supply cords to power sources, it is necessary to make sure that the power voltage is
lower than 250V AC and matches the rated voltage indicated on the motor's name plate.
※Attention: If the Control Box is AC 220V system, please don't connect the Control Box to AC 380V power
outlet. Otherwise, the error will occur and motor will not work. If that happens, please turn off the power
immediately and check the power voltage. Continue supply 380V power over 5 minutes might damage the
fuse F2, burst the electrolytic capacitors and the power module U14 of the main board and even might
endanger the person safety.
6） Please don't operate in direct sun light, outdoors area and where the room temperature is over 45℃or below
0°C.
7） Please avoid operating near the heater at dew area or at the humidity below 10% or above 95%.
8） Please don't operate in area with heavy dust, corrosive substance or volatile gas.
9） Avoid power cord being applied by heavy objects or excessive force, or over bend.
10） The earth wire of power cord must be connected to the system ground of the production plant by proper size of
conductions and terminals. This connection should be fixed permanently.
11）All the moving portions must be prevented to be exposed by the parts provided.
12） Turing on the machine in the first time, operate the sewing machine at low speed and check the correct rotation
direction.
13）Turn off the power before the following operation:
1. Connecting or disconnecting any connectors on the control box or motor.
2. Threading needle.
3. Raising the machine arm.
4. Repairing or doing any mechanical adjustment.
5. Machine is out of work.
14）Repairing and high level maintenance work should only be done by electronic technicians with appropriate
training.
15）All the spare parts for repairing work must be provided or approved by the manufacturer.
16）Don't use any objects to hit or ram the product.
Guarantee Time
Warranty period of this product is 1 year dated from purchasing, or within 2 years from ex-factory date.
Warranty Detail
Any trouble found within warranty period under normal operation, it will be repaired free of charge.
However, maintenance cost will be charged in the following cases even if within warranty period:
1. Inappropriate use, including: wrong connecting high voltage, wrong application, disassemble, repair,
modification by incompetent personnel, or operation without the precaution, or operation out of its
specification range, or inserting other objects or liquids into the product.
2. Damage by fire, Earth quake, lighting, wind, flood, salt corrosive, moisture, abnormal power voltage and
any other damage cause by the natural disaster or by the inappropriate environments.
3. Dropping after purchasing or damage in transportation by customer himself or by customer's shipping
agency.
* Note: We make our best effort to test and manufacture the product for assuring the quality. However, it is possible
that this all a failsafe device. (Such as residual current breaker).
SIRUBA DL-720 Instruction
Safety Instruction
，must be observed or executed; Otherwise, bodily injuries might occur.
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