3220 DC link undervoltage Fault in ABB ACS880 Drive

3220 DC link undervoltage Fault in ABB ACS880 Drive indicates that the drive has detected that the DC bus voltage is too low for reliable operation. 

 

ACS880 Fault Guide: DC Link Undervoltage

Fault 3220
Definition: The drive has detected that the DC bus voltage is too low for reliable operation.

The DC Link is the intermediate stage of the drive where AC power is converted to DC before being inverted back to AC for the motor. If this voltage drops below a specific threshold (based on the supply voltage), the ACS880 will trip to protect its internal components and ensure motor performance.

DANGER: High Voltage! DC Link capacitors retain lethal charge even after the power is turned off. Wait at least 5-15 minutes (check your manual) and verify with a multimeter before touching terminals.

Common Causes

• Input Power Loss: A phase loss or a total drop in the incoming AC supply.
• Blown Fuses: One or more main input fuses have cleared.
• Inrush Circuit Failure: The internal charging resistor or bypass contactor is damaged.
• Undersized Supply: A heavy load on the same power grid causing a significant voltage dip.
• Internal Rectifier Fault: The bridge rectifier is failing to convert AC to DC properly.

Troubleshooting Steps

• Step 1: Verify Input Voltage: Measure the AC voltage at terminals L1, L2, and L3. Ensure all three phases are present and balanced.
• Step 2: Monitor DC Bus via Panel: Go to the Control Panel and check Parameter 01.11 (DC Voltage). For a 400V supply, the DC bus should be approximately 540V DC (AC x 1.35).
• Step 3: Inspect Fuses & Disconnects: Check the continuity of the main supply fuses and the state of the circuit breaker or isolator.
• Step 4: Check Undervoltage Control: View Parameter 30.31 (Undervoltage Control). If the supply is known to be weak, ensure this is enabled to allow the drive to "ride through" minor dips.
• Step 5: Load Evaluation: Does the fault occur only when the motor starts? This indicates a "Voltage Sag" due to high current draw or high source impedance.

Relevant Parameters

Parameter	Name	Description
01.11	DC Voltage	Real-time measured DC bus voltage (in Volts).
30.31	Undervoltage Control	Activates the DC voltage regulator to prevent tripping during short power losses.
95.01	Supply Voltage	Ensure this matches your actual grid voltage (e.g., 380-415V).

If the fault 3220 persists even when input power is stable and fuses are intact, the issue may lie within the drive's internal charging circuit. In such cases, contact your local ABB service provider for a hardware inspection.

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