2104

DC Terminal Temperature Abnormal

Major

1

1. The DC power cable is not of the recommended specifications or is oxidized.
2. The DC connector is not properly inserted.
3. The OT/OD terminals of the DC cable are not crimped as required, or the tightening torque of the wiring terminals on the DC side does not meet the requirement.

2

The temperature of the DC terminal on MPPT1 is abnormal.

3

The temperature of the DC terminal on MPPT2 is abnormal.

4

The temperature of the DC terminal on MPPT3 is abnormal.

5

The temperature of the DC terminal on MPPT4 is abnormal.

6

The temperature of the DC terminal on MPPT5 is abnormal.

7

The temperature of the DC terminal on MPPT6 is abnormal.

8

The temperature of the DC terminal on MPPT7 is abnormal.

9

The temperature of the DC terminal on MPPT8 is abnormal.

10

The temperature of the DC terminal on MPPT9 is abnormal.

11

The temperature of the DC terminal on MPPT10 is abnormal.

1

Power off the device and other devices connected to the same DC bus (issue a shutdown command, turn off the switches on the AC side and DC side, and wait for the period specified on the device safety warning label), and then perform the following steps:

1. Check whether the cables meet the requirements.
2. Check whether the DC connector is properly inserted.
3. Check whether the OT/OD terminals are crimped as required and whether the tightening torque of wiring terminals meets the requirement.
4. Turn on the AC switch and DC switch, and restart the inverter.
5. If the fault persists, contact the vendor or technical support.

2

Power off the device (turn off the AC and DC switches, and wait for a period specified on the device safety warning label), and check the cable connection to the DC terminal of MPPT1 as follows:

1. Check whether the cables meet the requirements.
2. Check whether the PV terminal cores are crimped properly.
3. Check whether the PV terminal models are correct.
4. Check whether PV terminals are loosely connected.
5. If the preceding items are normal, turn on the AC switch and DC switch, and restart the device. If the fault persists, contact the vendor or technical support.

3

Power off the device (turn off the AC and DC switches, and wait for a period specified on the device safety warning label), and check the cable connection to the DC terminal of MPPT2 as follows:

1. Check whether the cables meet the requirements.
2. Check whether the PV terminal cores are crimped properly.
3. Check whether the PV terminal models are correct.
4. Check whether PV terminals are loosely connected.
5. If the preceding items are normal, turn on the AC switch and DC switch, and restart the device. If the fault persists, contact the vendor or technical support.

4

Power off the device (turn off the AC and DC switches, and wait for a period specified on the device safety warning label), and check the cable connection to the DC terminal of MPPT3 as follows:

1. Check whether the cables meet the requirements.
2. Check whether the PV terminal cores are crimped properly.
3. Check whether the PV terminal models are correct.
4. Check whether PV terminals are loosely connected.
5. If the preceding items are normal, turn on the AC switch and DC switch, and restart the device. If the fault persists, contact the vendor or technical support.

5

Power off the device (turn off the AC and DC switches, and wait for a period specified on the device safety warning label), and check the cable connection to the DC terminal of MPPT4 as follows:

1. Check whether the cables meet the requirements.
2. Check whether the PV terminal cores are crimped properly.
3. Check whether the PV terminal models are correct.
4. Check whether PV terminals are loosely connected.
5. If the preceding items are normal, turn on the AC switch and DC switch, and restart the device. If the fault persists, contact the vendor or technical support.

6

Power off the device (turn off the AC and DC switches, and wait for a period specified on the device safety warning label), and check the cable connection to the DC terminal of MPPT5 as follows:

1. Check whether the cables meet the requirements.
2. Check whether the PV terminal cores are crimped properly.
3. Check whether the PV terminal models are correct.
4. Check whether PV terminals are loosely connected.
5. If the preceding items are normal, turn on the AC switch and DC switch, and restart the device. If the fault persists, contact the vendor or technical support.

7

Power off the device (turn off the AC and DC switches, and wait for a period specified on the device safety warning label), and check the cable connection to the DC terminal of MPPT6 as follows:

1. Check whether the cables meet the requirements.
2. Check whether the PV terminal cores are crimped properly.
3. Check whether the PV terminal models are correct.
4. Check whether PV terminals are loosely connected.
5. If the preceding items are normal, turn on the AC switch and DC switch, and restart the device. If the fault persists, contact the vendor or technical support.

8

Power off the device (turn off the AC and DC switches, and wait for a period specified on the device safety warning label), and check the cable connection to the DC terminal of MPPT7 as follows:

1. Check whether the cables meet the requirements.
2. Check whether the PV terminal cores are crimped properly.
3. Check whether the PV terminal models are correct.
4. Check whether PV terminals are loosely connected.
5. If the preceding items are normal, turn on the AC switch and DC switch, and restart the device. If the fault persists, contact the vendor or technical support.

9

Power off the device (turn off the AC and DC switches, and wait for a period specified on the device safety warning label), and check the cable connection to the DC terminal of MPPT8 as follows:

1. Check whether the cables meet the requirements.
2. Check whether the PV terminal cores are crimped properly.
3. Check whether the PV terminal models are correct.
4. Check whether PV terminals are loosely connected.
5. If the preceding items are normal, turn on the AC switch and DC switch, and restart the device. If the fault persists, contact the vendor or technical support.

10

Power off the device (turn off the AC and DC switches, and wait for a period specified on the device safety warning label), and check the cable connection to the DC terminal of MPPT9 as follows:

1. Check whether the cables meet the requirements.
2. Check whether the PV terminal cores are crimped properly.
3. Check whether the PV terminal models are correct.
4. Check whether PV terminals are loosely connected.
5. If the preceding items are normal, turn on the AC switch and DC switch, and restart the device. If the fault persists, contact the vendor or technical support.

11

Power off the device (turn off the AC and DC switches, and wait for a period specified on the device safety warning label), and check the cable connection to the DC terminal of MPPT10 as follows:

1. Check whether the cables meet the requirements.
2. Check whether the PV terminal cores are crimped properly.
3. Check whether the PV terminal models are correct.
4. Check whether PV terminals are loosely connected.
5. If the preceding items are normal, turn on the AC switch and DC switch, and restart the device. If the fault persists, contact the vendor or technical support.