22.04.2025 by Viktor Siebert

In this post, I want to clearly highlight the importance and urgency of inspecting and timely replacing the fans in Omron R7D-AP08H Servopacks.

Common Causes and Risks of Defective Fans

We frequently receive devices with fans that have either completely failed or rotate too slowly due to contamination or simply exceeding their expected lifespan—often far beyond what might initially be suspected. Fans should almost be treated as consumable items that must always be replaced, even if they appear to function well and seem fine at first glance. Without adequate airflow, critical components aren’t cooled sufficiently, accelerating wear and ultimately leading to device failure, which in some cases can be irreparable.

Risks Associated with Incorrectly Replaced Fans

Additionally, I’d like to address another important issue: We have already received Servopacks where the fans had been previously replaced. We made some intriguing findings here—some fans rotated in the wrong direction, while others were too weak, despite matching the original model number. After detailed analysis, we discovered that these fans were either replicas or entirely different models labeled with the correct type designation.

Recommendations and Warning about Counterfeit Products

Our advice: When replacing fans—which is absolutely correct and necessary—please ensure they are thoroughly checked or sourced directly from professional suppliers. Almost all products offered, especially through eBay from Asian sellers, are counterfeit, non-compliant, malfunction, or do not function at all. Frequently, these are used units merely cosmetically refurbished.

Additional Information – Omron Servopack

Omron Servopack R7D-AP08H

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