32
ACH550 Installation, Operation and Maintenance Manual
ACH550-UH
Maintenance intervals
If installed in an appropriate environment, the drive requires very little maintenance.
This table lists the routine maintenance intervals recommended by ABB.
Heatsink
The heatsink fins accumulate dust from the cooling air. Since a dusty heatsink is less
efficient at cooling the drive, overtemperature faults become more likely. In a
“normal” environment (not dusty, not clean) check the heatsink annually, in a dusty
environment check more often.
Clean the heatsink as follows (when necessary):
1. Remove power from drive.
2. Remove the cooling fan (see section
Drive module fan replacement
on page
33
).
3. Blow clean compressed air (not humid) from bottom to top and simultaneously use a
vacuum cleaner at the air outlet to trap the dust.
Note:
If there is a risk of the dust entering adjoining equipment, perform the cleaning
in another room.
4. Replace the cooling fan.
5. Restore power.
Maintenance
Application
Interval
Instruction
Check/replace R7/R8
enclosure inlet air filter
R7/R8 UL type 12
enclosures
Check every 3
months. Replace as
needed.
Frame Sizes R7/R8 – UL
type 12 enclosure inlet air
filter on page 35
Check/replace R7/R8
enclosure exhaust air
filter.
R7/R8 UL type 12
enclosures
Check every 6
months. Replace as
needed.
Frame Sizes R7/R8 – UL
type 12 enclosure exhaust
filters on page 37
Check and clean
heatsink.
All
Depends on the
dustiness of the
environment (every
6…12 months)
See
Heatsink
below.
Replace drive module
fan.
All
Every six years
See
Drive module fan
replacement on page 33
.
Replace enclosure fan.
UL type 12
enclosures
Every three years.
See
Enclosure fan
replacement – UL Type 12
enclosures on page 34
.
Change capacitor.
Frame sizes R5,
R6 and R8
Every ten years
See
Capacitors on
page 38
.
Replace battery in the
Assistant control panel
All
Every ten years
See
Control panel on
page 38
.
