Important information regarding ML and HP systems
Potentially Faulty Capacitors in Siemens Power Supply Units
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TB: 25-03
Date: Friday, January 24th, 2025
Product Lines Affected: ML and HP systems with build dates after 2022
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Siemens has reported that a run of their PSU200M power supply units (PSUs) were potentially manufactured with faulty capacitors, leading to a power fault. These power supply units are used in ML and HP fogging systems.
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PSU faults manifest as the humidifier will not turn on/blank display.
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ML and HP pumps with manufacture dates of January 1, 2022 or later may be affected if they contain a Siemens PSUs with the following serial numbers listed below. Power supply serial numbers are labelled on the side of the power supply, as shown in
Figure 2.
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| Figure 2: PSU Side view - Power supply serial numbers are labelled on the side of the power supply
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SN: S YSU/Pxxx (2022)
- SN: S YSU/R1xxx to SN: S YSU/R9xxx (January 2023 – September 2023)
- SN: S YSU/ROxxx (October 2023)
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e.g. Q6R4AR7BFE1 was manufactured in April 2023 in Vienna
Q6 = Manufactured in Vienna
R = Year 2023
4 = April
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Affected equipment does not present a safety hazard , but may affect the reliability of the equipment. If you are having power issues with the ML/HP unit, it is recommended that you check the PSU.
If you have a ML or HP Series equipped with the PSU200M and with a serial number in the range specified above, please contact our Warranty team for replacement of the power supply under warranty.
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If you have questions, please contact the Technical Product Manager undersigned.
Sincerely,
Montana McElwain
Technical Product Manager
Office: +1 866 667 8321
montana.mcelwain@condair.com
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