Why does the new SPC7K5TR46-S (F) report A-LS immediately upon power-on, and how to troubleshoot it?
A-LS failure is usually caused by low bus voltage resulting from weak light intensity.
1. First check whether the parameters of the frequency converter are set correctly
2. Check whether the bus voltage is too low
3. Check whether the external weather environment has weak light intensity
If none of the above applies, there may be hardware damage. Please contact the INVT staff.
1. Verify whether the physical quantity configured for the corresponding channel in the AO group is correct.2. Check if the voltage/current gear set by the DIP switches on the main control board matches the current configuration. The 4–20 mA signal is preferred for long-distance transmission.
3. Confirm fluctuations of the input analog signal, and calibrate the input channel via parameters in Group P5.
4. Chaotic power supply and common grounding of the AO module. The AO module must be grounded independently.
5. Twisted-pair cables shall be adopted for AO signal wires with shielding layer grounded. These cables shall be routed separately from high-voltage power cables.
The UPS displays the alarm 'Rectifier fail‑Set/REC Soft Start Fail‑SET' on the screen and the rectifier fails to start normally. How to troubleshoot this fault?
A: When the UPS of this series shows the alarm 'Rectifier fail‑Set/REC Soft Start Fail‑SET' on its screen, please carry out troubleshooting in accordance with the following steps:
1.Re-insert the Power Module into the cabinet again.
2.Remove the cover of the faulty UPS, and Locate the rectifier power board 17001-02401 (There are three pieces of this board in the Power Module), and test the IGBT according to the requirements . If it is damaged, replace the board and check the result.
2.Locate the input SCR board 17001-05097 , and test the fuses and SCR according to the requirements . If it is damaged, replace the board and check the result.
NOTE: These alarms cause most probably because of the INPUT and RECTIFIER power board.
4.Locate the inverter power board 17001-02549 (There are three pieces of this board in the Power Module), and test the IGBTs according to the requirements. If it is damaged, replace the board and check the result.
5. Locate the inverter busbar board 17001-02458, and test the fuses according to the requirements. If it is damaged, replace the board and check the result.
6.Check the rectifier busbar board 17001-02385 using the same method as step 5；If it is damaged,replace the board and check the result.
Alternatively, check whether a bus voltage value（Searching Way：MODULE-INFO-BUS） is displayed for this module on the UPS screen；if the voltage is displayed and within the normal range, it indicates the unit is functioning properly
7. Replace the control board 17001-02348.
For the GD100-PV machine, the customer measured a three-phase imbalance using a multimeter. After replacing the driver board, main power board, and IGBT, the voltage imbalance still occurred.
It is necessary to check the output of the control board. There is a possibility that the VFD inverter part being damaged could cause abnormal output from the control board's three phases.
How can the DA807 SNMP card display the input and output three-phase current, battery current, active and reactive power, etc.：
1. Connect the DA807 SNMP card to the UPS and enter the main page.
2. Enter the UPS configuration page and set the correct protocol. For 3/3 machines, select MegaTec Three phase (3 input - 3 output); for 3/1 machines, select MegaTec Three phase (3 input - 1 output).
3. Return to the main page and click the main path input icon to display the input parameter information.
4. The operation steps for the battery and output information are the same as above.
How can the DA807 SNMP card display the input and output three-phase current, battery current, active and reactive power, etc.?
A: 1.Connect the DA807 SNMP card to the UPS and enter the main page.
2. Enter the UPS configuration page and set the correct protocol. For 3/3 machines, select MegaTec Three phase (3 input - 3 output); for 3/1 machines, select MegaTec Three phase (3 input - 1 output).
3. Return to the main page and click the main path input icon to display the input parameter information.
4. The operation steps for the battery and output information are the same as above.
When using the analog input to control the frequency, the system fails to detect 10Hz. If set to 10Hz, the AI shows 0%; if set to 25Hz, the AI shows 32%; if set to 40Hz, the AI shows 87%; if set to 50Hz, the AI shows 99%. How should it be adjusted?
A: In the MVDP5 group parameters, select to adjust the accuracy of AI1 to control the accuracy of the analog input.
How to solve the problem of large 100A fluctuation in the output current at the fan application site of the GD5000 inverter
A: 1. Verify whether the VFD parameters are set correctly, confirm if the motor has undergone self-learning, and check the working conditions at the customer site;
2. Observe the operating data of the motor and load before and after decoupling, and confirm whether the problem is a mechanical issue on the load side or an electrical issue on the equipment side based on the observed phenomena.
3. If the no-load output is stable but regular current fluctuations occur when loaded, it is most likely a mechanical fault on the load side. It is recommended that the customer perform dynamic balance correction, and check the alignment accuracy of the coupling, bearing clearance, etc.
When the P00.09 frequency source configuration is set to B (frequency source setting), i.e., P00.09 = 1, and the P43 group sleep function is used, the system cannot enter sleep mode even when the frequency falls below the sleep threshold.
A: When using the P43 group sleep function, P00.09 must be forcibly set to 0 by default, i.e., A (frequency source setting).
Our site uses cookies to provide you with a better onsite experience. By continuing to browse the site you are agreeing to our use of cookies in accordance with our Cookie Policy.
