Potentially Faulty Capacitors in Siemens Power Supply Units

TB: 25-03
Date: Friday, January 24th, 2025
Product Lines Affected: ML and HP systems with build dates after 2022

OVERVIEW

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.   

SYMPTOMS

PSU faults manifest as the humidifier will not turn on/blank display.  

AFFECTED EQUIPMENT

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.

Figure 1: PSU Top view

Figure 2: PSU Side view - Power supply serial numbers are labelled on the side of the power supply

Model: Siemens PSU200M

e.g. Q6R4AR7BFE1 was manufactured in April 2023 in Vienna 

Q6 = Manufactured in Vienna 
R = Year 2023 
4 = April 

USER RECOMMENDATIONS

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.    

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