Support

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.

1. Check whether the voltage of the switchgear at the front end of the inverter is normal
 2. Check whether the inverter input voltage coefficient is normal; the default is 100%. 
3. Check whether the voltage detection board is working properly and verify its specifications and model
 4. If the actual measured voltage matches the customer's on-site voltage, adjust the input voltage detection coefficient to keep the inverter and the customer's site voltage consistent, avoiding system misidentification of undervoltage and accidental tripping

 ① Access control failure: The contact points of the access control switch are broken, or the S3 interface of the system IO board is faulty.
② Overheating of the phase-shifting transformer: The direction of the fan is incorrect, the temperature controller gives a false alarm, or there is too much dust in the environment.
③ Bypass cabinet action failure: The manual/automatic type setting is incorrect, or the address setting is wrong.
④ Buffer cabinet failure: The buffer contactor or the system IO board is faulty.
⑤ Frequency converter overload: The selected model is too small; the grid voltage is too low; the parameter setting is incorrect; the current detection circuit is faulty.

GD5000 VFD can be used for the whole machine container scheme, the standard IP level is IP54; Special IP class needs to be confirmed with INVT manufacturer.

The load of the mixer requires 150% current to last for 1 minute, so the selection of VFD is 1.66 times larger than the motor.

For the whole sugarcane mill line, located in the first press, the selection of the motor magnification 1.4 times, the remaining VFD magnification 1.2 times.

The GD5000 power cells don't has pre-charging circuit, but the whole VFD has a buffer circuit, which can pre-charge and buffer the cells.

The main interface cannot be accessed

First, determine the model of HMI. If it is TPC1062KI mode, it is a hardware problem. If it is TPC1061TH mode, first write HMI program to try. If the problem can not be solved, need to replace the HMI.

According to customer's requirements, we can supply  gear switch cabinets and  soft starters.