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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. 42.
Fig. 42 — 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.
5.
Restore power.
Fan Replacement
The life span of the drive's cooling fan(s) depends on the drive us-
age and ambient temperature.
Fan failure can be predicted by the increasing noise from fan bear-
ings and the gradual rise in the heat sink temperature in spite of
heat sink cleaning. If the drive is operated in a critical part of a
process, fan replacement is recommended once these symptoms
start appearing. Replacement fans are available from Carrier.
ACH580 MAIN FAN REPLACEMENT
To replace the main fan for frame sizes R1 and R2, perform the
following (see Fig. 43 and Fig. 44):
1.
Remove power from drive. Wait for 5 minutes and then make
sure by measuring that there is no voltage
2.
Remove drive cover.
3.
Press together the retaining clips on the fan cover and lift.
Disconnect the fan cable.
4.
Install the new fan by reversing Steps 2 to 4.
5.
Restore power.
Fig. 43 — Remove Main Fan Fingerguard
Fig. 44 — Remove Main Fan
ACH580 AUXILIARY COOLING FAN REPLACEMENT
To replace the internal enclosure fan for frame sizes R1 and R2
perform the following (see Fig. 45, 46, and 47):
1.
Remove power from drive. Wait for 5 minutes and then make
sure by measuring that there is no voltage.
2.
Remove the remote keypad, if installed. See Fig. 45.
3.
Remove the front cover by loosening the retaining screw. See
Fig. 46.
4.
Unplug fan power supply wires from the drive (see Fig. 47).
5.
Remove the fingerguard: Insert a screwdriver into the hole of
the fingerguard (see Fig. 47).
6.
Unplug the fan power supply wires from the drive (see
Fig. 47).
7.
Pull off the fan.
8.
Install the new fan in reverse order.
NOTE: Make sure that the arrow on the fan points to the same
direction as the arrow on the drive frame.
31
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