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FAQs Library
Q
How do you measure the main circuit?
A

Use a digital meter with diode gear to measured R, S, T terminal rectifier bridges which should be between 0.26-0.38. The voltage drop of U, V and W modules should be between 0.3-0.38 and balanced with each other. Then measure in areverse way and if the result is the same, it means the main circuit tube voltage is normal.

Q
The inverter jumps OC1, OC3 at power up?
A

If the inverter does not drive the motor, the cause of the failure could be: 

1.The current detection circuit is damaged; 

2.Hall burnt out; 

3.Poor controlboard.

Q
No display at power up?
A

If the power indicator light is on, the possible reasons for why the keyboard doesnot display the fault: 

1. Drive power plate is damaged or short circuited; 

2.Bad keyboard contact or burnt keyboard; 

3. Damage of main control board; 

4.Keyboard display setting error. 


If the power indicator is not on, the cause offailure may be: 

1. There is no power input; 

2. The fuse is broken; 

3. Therectifying bridge is broken.

Q
Why is terminal function invalid?
A

Possiblecauses of failure: 

1. Loss of the terminal 24V and PW bronze medal;

2. Terminal24V voltage is abnormal;

3. Terminal damage;

4. Error of terminal polaritysetting;

5. Improper parameter setting.

Q
What is the lead time of INVT inverter?
A

The lead time for different types of products varies according to different order quantity. The lead time for regular standard products is one week as they are in stock. The lead time for customized product is about one month, the actual lead time shall be subject to the commercial contract.

Q
How to repair the INVT products sold overseas?
A

INVT has established local maintenanceoutlets for machines sold overseas to provide paid after-sales service;Domestic distributor  contact the INVTservice hotline , the INVT service hotline sends workers to overseasmaintenance outlets, and the overseas maintenance network responds by telephonein 24 hours. If overseas maintenance problem cannot be handled by telephone,the overseas maintenance network will arrange personnel to handle the problemon-site within 72 hours. The overseas maintenance network covering: Vietnam,Malaysia, Thailand, India, Indonesia, Russia, Belarus, Ukraine, Brazil, Turkey,Australia, South Africa, Bangladesh, Pakistan, Italy, Burma, Poland, the unitedArab emirates, Israel and other peripheral regions.

Q
Where does INVT establish service outlets in China?
A

At present, our company (headquarters) in Shenzhen, Nanchang, Nanning, Chengdu, Xian, Urumqi, Wuhan, Zhengzhou, Wuxi, Hangzhou, Quanzhou, Hefei, Jinan, Shijiazhuang, Taiyuan, Hohhot, Beijing, Shenyang, Harbin, Xiangtan, Guiyang, Baoding, Qingdao, Xiamen, Fuzhou, offices in Taizhou, Nantong, Foshan, We have established a service team of more than 120 people to provide around-the-clock service to customers.

Q
The inverter displays POFF at power up for operation?
A

Possiblecauses of failure:

1. The input voltage is too low;

2. Failure of phase plate;

3. Failure of master control board;

4. Voltage setting error

Q
What is the maintenance address and contact number for INVT inverters?
A

Now we have 3 maintenance centers, so you can select the proper repair center to repair the machine.


1. Wuxi maintenance center address: room 601, no.2 building, Xinzhou business science park, no. 89, xingchuang road, Wuxi new district, Tel: 18002568725, 13771142233; contact: Shen jian, Ju ping


2. Shenzhen maintenance center address: Shenzhen INVT Electric Co., Ltd., Fuyong street, Baoan district, Shenzhen city. Contact: 0755-86312864, 0755-86312902; contact: Cheng ping, Long guo qiang


3. Shenyang maintenance center address: room 1502, no. 48-1, Guanfang garden, no. 48-1, cultural road, Heping district, Shenyang, Liaoning province, tel. 18002568737 024-31502457; contact: Lin tian yi

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