ACH550-UH User’s Manual
221
Maintenance
Maintenance
Warning! Read "Safety" on page 3 before performing any maintenance on the
equipment. Ignoring the safety instructions can cause injury or death.
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 "Main Fan Replacement" on page 222).
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
Interval
Instruction
Heatsink temperature check
and cleaning
Depends on the dustiness of the
environment (every 6…12
months)
See "Heatsink" on page 221.
Main cooling fan replacement
Every five years
See "Main Fan Replacement"
on page 222.
Internal enclosure cooling fan
replacement
(IP 54/UL Type 12 units)
Every three years.
See "Internal Enclosure Fan
Replacement" on 223.
Capacitor change
(Frame sizes R5 and R6)
Every ten years
HVAC control panel battery
change
Every ten years
See “Battery” on page 62.
