SMA WB 5000 Installation - Manual (Page 43)

SMA Technology AG Checking heat dissipation
Installation Guide WB50_60-11:SE4005 Page 43
8 Checking heat dissipation
You need only check the heat dissipation of the Sunny Boy 3800 if, during a visual
inspection, you notice a marked build-up in the filter or the Windy Boy is increasingly
observed to be in derating mode. A Sunny Boy 3800 switching to derating mode
depends on the ambient temperature and cooling efficiency. This means a device
with dirty filters (low air-flow) and low ambient temperature can rarely or never
switch to derating mode, whereas this can happen relatively often with a Sunny Boy
3800 that has a good air-flow and high ambient temperature.
8.1 Cleaning the fans
If the fan guards are only covered in loose dust, they can be cleaned with a vacuum-
cleaner. If you do not achieve satisfactory results with a vacuum-cleaner, you can
dismantle the fans for the sake of cleaning.
The fans are mounted on a sheet metal plate on the underside of the Sunny Boy
3800. In order to clean the fans, observe the following procedure:
1. Disconnect the Sunny Boy 3800 from both the DC
and AC connections.
2. Wait for the fans to stop rotating.
3. Remove the six screws which secure the fan
element on the underside of the case.
4. Carefully remove the metal plate with the fans
attached.
5. Unlock the plugs of the connecting cables of the
fans and remove them carefully.
6. Each of the fans are fastened to the plate with four
nuts. Remove the four nuts to remove the fans and
the filters below them.
7. Clean the filters and fans using a soft brush, a
paint brush or a cloth. Do not use compressed air as this can damage the fan.
Pac 903W
Upv 330V
Windy
Boy
Netzwechselrichter für Windenergieanlagen Netzwechselrichter für Windenergieanlagen
Grid tied inverter for wind turbines Grid tied inverter for wind turbines