HF reactor module: Overtemperature or fan failure

What does 237312 mean?

This alarm indicates that the reactor module has detected an overtemperature condition or a fan failure. The immediate causes can include a disconnected or defective connector between the reactor and damping module, a malfunctioning reactor module fan, or an excessively high ambient temperature. If this alarm persists for longer than 30 seconds, it will escalate to fault F37313, indicating a more critical condition. Continued operation under these conditions risks permanent damage to the module.

• Cooling fan connector (e.g., X3) between the reactor module and its fan unit is loose, disconnected, or damaged, causing fan stoppage.
• Cooling fan motor winding fault or bearing failure, preventing rotation and leading to internal overtemperature due to lack of airflow.
• Accumulation of dust and debris directly on the reactor coil and associated heat sinks, hindering heat dissipation.
• Ambient air temperature inside the control cabinet exceeding the permissible operating limit for prolonged periods (e.g., >40°C).
• Internal temperature sensor (e.g., X12) or fan speed sensor (e.g., X3, tachometer output) malfunction, leading to false fault detection.

Click steps to track your progress.

1. 1

   Power down and visually inspect the fan connector (e.g., X3) for proper seating and check for bent or corroded pins.

2. 2

   Measure the resistance of the fan motor windings (if accessible) and verify it against manufacturer specifications (e.g., 10-50 Ohms).

3. 3

   Clean the internal components of the reactor module, including coils and heat sinks, using a non-conductive vacuum or compressed air.

4. 4

   Measure the actual fan speed (if a tachometer output is available on X3) or fan motor current to confirm proper operation.

5. 5

   Monitor the internal temperature reading of the reactor module (r0035[x]) via the drive control unit's diagnostic interface.