Table of Contents
Advertisement
VFD MAINTENANCE
If installed in an appropriate environment, the VFD requires
very little maintenance.
Table 40 lists the recommended routine maintenance.
Table 40 — Maintenance Intervals
MAINTENANCE
Heat sink temperature check
and cleaning
HVAC control panel battery
change
HEAT SINK CLEANING
The heat sink fins accumulate dust from the cooling air. In a
normal environment check, the heat sink annually. In a
dusty environment, check more often.
Use the following procedure to clean the heat sink on
ASC320 VFDs:
1. Turn off and lock out unit power.
2. Insert a small straight blade screwdriver into the slot
and press in to release the top cover as shown in
Fig. 32.
Fig. 32 — Remove Top Cover on ACS320 VFD
3. Blow clean compressed air (not humid) from top of
ACS320 while simultaneously using a vacuum
cleaner at the base to trap the dust.
4. Replace the top cover.
Restore power.
Use the following procedure to clean the heat sink on
AHC550 VFDs:
1. Turn off and lock out unit power.
2. Remove the drive cover (see Fig. 33).
3. Press together the retaining clips on the top cover and
lift (see Fig. 34).
FASFHS150-180-01SI
INTERVAL
Every 6 to 12 months
(depending on the dustiness of
the environment)
Every ten years
Specifications subject to change without notice.
Captive
Screw
Fig. 33 — Remove ACH550 VFD Front Cover
3
2
Fig. 34 — 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.
3
35
Advertisement
Table of Contents
