Do any of the ATV31 drives Not have an internal fan ?

Issue: Do any of the ATV31 drives Not have an internal fan ?

Product Line: ATV31

Environment: ATV31H018M2 & ATV31H018M2A & ATV31H018M3X & ATV31H018M3XA
ATV31H037M2 & ATV31H037M2A & ATV31H037M3X & ATV31H037M3XA
ATV31H055M2 & ATV31H055M2A & ATV31H055M3X & ATV31H055M3XA
ATV31H075M2 & ATV31H075M2A & ATV31H075M3X & ATV31H075M3XA

Cause: No heatsink fan

Resolution: Yes, the following do not have a heatsink fan:
ATV31H018M2 & ATV31H018M2A & ATV31H018M3X & ATV31H018M3XA
ATV31H037M2 & ATV31H037M2A & ATV31H037M3X & ATV31H037M3XA
ATV31H055M2 & ATV31H055M2A & ATV31H055M3X & ATV31H055M3XA
ATV31H075M2 & ATV31H075M2A & ATV31H075M3X & ATV31H075M3XA