Veichi AC310, Service Manual

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AC310 Universal AC Drive Service Manual
Solution: Repair according to the driving circuit of the power supply board.
2. Whether the driving circuit on the control board is abnormal.
Cause: If there is a problem with one phase of the driving circuit on the control board,
resulting in no voltage output on the power supply board, the fault will be reported.
Solution: Repair according to the driving circuit of the control board.
3. IGBT module damage
Cause: If there is a problem with one phase of IGBT AC drive, there is no voltage
output on the power supply board, and the fault will be reported.
Solution: Replace the IGBT module.
4. Abnormal current detection circuit.
Cause: The principle of output phase loss is whether the output voltage and current of
AC drive are balanced within a certain error, so the current detection circuit will also
report fault. The current detection circuit will also report a fault.
Solution: Check according to the current detection method.
4.9 Current Detection Fault (E.HAL)
1. Damaged IGBT module
Cause: IGBT AC drive is damaged, resulting in three-phase imbalance of output current,
thus reporting a fault.
2. Failure of current detection circuit on the power supply board
Cause: Circuit failure (current detection chip, Hall device, current detection resistor
circuit failure), thus the collected current is faulty, causing the CPU to make wrong
judgment.
Measurement method: According to the current detection circuit method to detect.
3. Failure of the current acquisition circuit on the control board.
Cause: Circuit failure, causing CPU judgment error.
Measurement method: Test according to the current acquisition circuit maintenance
method