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The main inverter  fault codes are A003 AC undervoltage, E011 relay fault, three-phase voltage imbalance, self check not grid connected, burning connector, terminal block and switch

Possible causes:
1. The wiring screws of all protective appliances are not tightened, the crimping length of wire ends is not enough or pressed to the insulation layer, and the screw holes are ignited and ablated;
2. The wire cores connected to the connector are uneven, the core is not compressed, the crimping length of the core is not enough, the connector pin is pulled out, the exposed part is too long, L, N and PE wire are connected in wrong hole;
3. The screw of terminal block is not locked tightly;
4. The ground wire is suspended and the ground wire is overlapped at will;
5. The wire diameter is too small and the cable is burnt out;

Solutions:
1. Strengthen the training of electrical technology ability and standardize the electrical installation and wiring;
2. Strengthen the professional training of installation and construction personnel, and correctly handle the wire ends and crimping ends;
3. Reasonable wiring and reasonable selection of wire diameter;

In the process of placing orders, INVT will give customer a detailed list of spare parts, which will mark whether the spare parts are compatible with different models of VFDs; If the customer still has the previously ordered machine on site, it is necessary to confirm with INVT engineer whether it is compatible.

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.

Check whether the power cell IGBT and drive board are abnormal; Whether there is abnormal insulation between VFD and motor.