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ErrorLib — Industrial Fault Code Library

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237310

HF reactor module: Overtemperature

Siemens · DAsl Diagnostics and Alarms

What does 237310 mean?

The temperature of the HF reactor module has exceeded its permissible operating limit. Common causes include inadequate cooling (fan failure), system overload causing excessive heat generation, or an elevated ambient temperature in the installation environment. Prolonged overtemperature can degrade the reactor module's performance and significantly shorten its lifespan.

Common Causes

  • Insufficient cooling airflow through the module due to blocked vents or fan failure.
  • Continuous operation above the reactor's rated current (P0206), leading to excessive resistive losses.
  • High harmonic content in the line current, causing additional heating in the reactor windings.
  • Elevated ambient temperature within the control cabinet exceeding the reactor's specification.
  • Internal insulation breakdown or winding short circuit within the reactor, causing localized hot spots.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Disconnect power, visually inspect the HF reactor module and its immediate surroundings for dust accumulation or restricted airflow.

  2. 2

    Verify the operation of any dedicated cooling fans associated with the HF reactor module.

  3. 3

    Measure the actual line current (r0067) flowing through the HF reactor and compare it to its rated current (P0206).

  4. 4

    Use a thermal imaging camera to identify hot spots on the reactor windings or core during operation (if safe to do so).

  5. 5

    Check the ambient temperature inside the control cabinet and ensure it is within the specified operating limits for the reactor.

Browse all codes in this manual (31)
Verified technical data. Last updated: April 2026

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Source: Siemens DAsl Diagnostics and Alarms
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