Artesyn AXP1440, Installation And Use Manual, Page: 73 / 156

Site Preparation
AXP1440 Installation and Use (6806800H23U) 71
The AXP1440 system regulates the fan speed based on the temperature sensors present in the
system. The fan speed is adjusted to the lowest speed which still keeps the evaluated
temperature readings below or at their respective upper non-critical threshold. Hence, the fan
speed depends on the ambient temperature, blade design, temperature threshold settings,
and system configuration.
To guarantee proper blade operation, make sure that the temperatures at the locations
specified in the following are not exceeded. If not stated otherwise, the temperatures should
be measured by placing a sensor exactly at the given locations.
Table 3-2. Critical Temperature Limits
Component Temperature Limit
Air inlet (system’s front) 55°C (131 °F)
Air outlet (system’s rear) 70°C (158 °F)
Power entry module lug-plastic washer
70°C (158 °F)
>70°C (158 °F) and maximum 90°C (194 °F): the cables
must be isolated and must be approved to be used in
this temperature range.
>70°C (158 °F) and maximum 90° (194 °F): the
service personnel may touch the components:
the cables must be isolated and the hot surface
icon must be attached. The cables must be
approved to be used in this temperature range.