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VFD MAINTENANCE
If installed in an appropriate environment, the VFD requires very
little maintenance.
Table 18 lists the routine maintenance intervals recommended by
Carrier.
Table 18 — Maintenance Intervals
MAINTENANCE
Heat sink temperature check
and cleaning
Remote keypad battery change
Heat Sink Cleaning
The heat sink fins accumulate dust from the cooling air. In a nor-
mal environment check the heat sink annually, in a dusty environ-
ment check more often.
Use the following procedure to clean the heat sink on ACH550
VFDs:
1.
Turn off and lock out unit power.
2.
Remove the drive cover (see Fig. 39).
3.
Press together the retaining clips on the top cover and lift
(see Fig. 40).
Captive
Screw
Fig. 39 — Remove ACH550 VFD Front Cover
INTERVAL
Every 6 to 12 months
(depending on the dustiness of
the environment)
Every ten years
3
2
Fig. 40 — Remove Top Cover on ACH550 VFD
4.
Blow clean compressed air (not humid) from bottom to top
while simultaneously using a vacuum cleaner at the air
outlet to trap the dust.
5.
Replace the cooling fan.
6.
Replace the drive cover.
7.
Restore power.
Use the following procedure to clean the heat sink on ACH580
VFDs:
1.
Turn off and lock out unit power.
2.
Remove the drive cover (see Fig. 46).
3.
Remove the top fan cover (see Fig. 41).
4.
Blow clean compressed air (not humid) from bottom to top
while simultaneously using a vacuum cleaner at the air
outlet to trap the dust.
5.
Replace the top fan cover.
6.
Replace the drive cover.
7.
Restore power.
Fig. 41 — Remove Top Cover/Fan Assembly on
30
ACH580 VFD
3
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