Danfoss iC2 Application Manual page 267

Application Guide | iC2-Micro Frequency Converters
WARNING/FAULT 4, Mains Phase Loss
Cause
A phase is missing on the supply side, or the mains voltage imbalance is too high. This message also appears for a fault in the input
rectifier. Options are programmed in P 1.3.1 Mains Imbalance Function.
Troubleshooting
Check the supply voltage and supply currents to the drive.
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WARNING/FAULT 7, DC Overvoltage
Cause
If the DC-link voltage exceeds the limit, the drive trips after a time.
Troubleshooting
Extend the ramp time.
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Change the ramp type.
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WARNING/FAULT 8, DC Under Voltage
Cause
If the DC-link voltage (DC) drops below the undervoltage limit, the drive trips after a fixed time delay. The time delay varies with unit size.
Troubleshooting
Check that the supply voltage matches the drive voltage.
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Perform the input voltage test.
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Perform the soft charge circuit test.
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WARNING/FAULT 9, Inverter Overload
Cause
The drive is about to cut out because of an overload (too high current for too long). The counter for electronic, thermal inverter
protection issues a warning at 90% and trips at 100%, while giving a FAULT. The drive cannot be reset until the counter is below 0%.
The fault occurs when the drive has run with more than 100% overload for too long.
Troubleshooting
Compare the output current shown on the control panel with the drive rated current.
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Compare the output current shown on the control panel with measured motor current.
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Show the thermal drive load on the control panel and monitor the value. When running above the drive continuous current rating,
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the counter increases. When running below the drive continuous current rating, the counter decreases.
WARNING/FAULT 10, Motor Overload Temperature
Cause
According to the electronic thermal protection (ETR), the motor is too hot. Select whether the drive issues a warning or an alarm when
the counter reaches 100% in P 4.6.7 Motor Thermal Protection. The fault occurs when the motor runs with more than 100% overload for
too long.
Troubleshooting
Check if the motor is overheating.
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Danfoss A/S © 2024.03 AB413939445838en-000301 / 130R1254 |
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