ABB ACS880-1607, Hardware Manual

Page: 88 / 122

88 Maintenance
DC/DC converter module

Cleaning the module
The converter module heatsink fins pick up dust from the cooling air. Modules run into
overtemperature warnings and faults if the heatsink is not clean. When necessary, clean
the heatsink as follows.
WARNING! Only qualified electricians are allowed to do this work. Read the
complete safety instructions given in Safety instructions for ACS880 multidrive
cabinets and modules (3AUA0000102301 [English]) before you service the drive.
If you ignore them, injury or death, or damage to the equipment can occur.
WARNING! Wear protective gloves and long sleeves! Some parts have sharp
edges.
WARNING! Use a vacuum cleaner with an antistatic hose and nozzle. Using a
normal vacuum cleaner creates static discharges which can damage circuit
boards.
1. Disconnect the drive from the AC power line and DC/DC converter from the energy
storage and obey the instructions in section Electrical safety precautions on page 42 .
See Disconnecting the DC/DC converter with DC switch/disconnector (F286)
on page 66 .
2. Remove the cooling fan of the converter module as described under section Fans in
this chapter.
3. Blow clean, dry and oilfree compressed air through the module from bottom to top,
simultaneously using a vacuum cleaner at the air outlet to trap the dust. Note: If there
is a risk of dust entering adjoining equipment, perform the cleaning in another room.
4. Refit the cooling fan.