Indramat · dds 2.1 digital servo drive User Manual
A Class 1 Diagnostic indicating a critical fault related to the DDS 2.1 drive's cooling system, leading to an immediate shutdown. The drive decelerates to zero speed and shuts down torque. This condition is reset only after the cause is cleared and the command 'Reset Class 1 Diagnostics' is received via the service channel. This error signifies a failure in maintaining the drive's operating temperature within safe limits, distinct from simple over-temperature which allows a 30-second warning.
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Inspect the DDS 2.1 internal cooling fan for proper operation and ensure it is not obstructed; replace the drive if the fan is inoperative.
Verify that the heatsink fins and air inlets/outlets on the drive are clean and free of dust or debris.
Check for any error indications from external cooling units (e.g., cabinet air conditioner, heat exchanger) and ensure they are operating correctly.
Confirm the ambient temperature around the drive and within the control cabinet is within the specified operating range for the DDS 2.1.
If a specific cooling fluid circuit exists, verify its flow, pressure, and temperature.