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APPENDIX D — VFD INFORMATION (cont)
If diagnostics troubleshooting has determined that the
drive is defective during the warranty period, contact
ABB Automation Inc., at 1-800-435-7365, option 4, option 3.
A qualified technician will review the problem with the caller
and make a determination regarding how to proceed. This may
involve dispatching a designated service station (DSS) repre-
sentative from an authorized station, dispatching a replacement
unit, or advising return for repair.
VFD Maintenance — If installed in an appropriate envi-
ronment, the VFD requires very little maintenance.
Table E lists the routine maintenance intervals recommend-
ed by Carrier.
Table E — Maintenance Intervals
HEAT SINK — The heat sink fins accumulate dust from the
cooling air. Since a dusty sink is less efficient at cooling the
drive, overtemperature faults become more likely. In a normal
environment check the heat sink annually, in a dusty environ-
ment check more often.
Check the heat sink as follows (when necessary):
1. Remove power from drive.
2. Remove the cooling fan.
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. If there a risk of the dust entering adjoining
equipment, perform the cleaning in another room.
4. Replace the cooling fan.
5. Restore power.
MAIN FAN REPLACEMENT — The main cooling fan of
the VFD has a life span of about 60,000 operating hours at
maximum rated operating temperature and drive load. The
expected life span doubles for each 18 F drop in the fan
temperature (fan temperature is a function of ambient tempera-
tures and drive loads).
Fan failure can be predicted by the increasing noise from
fan bearings 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.
To replace the main fan for frame sizes R1 through R4,
perform the following (see Fig. D):
1. Remove power from drive.
2. Remove drive cover.
3. For frame sizes R1 and R2, press together the retaining
clips on the fan cover and lift. For frame sizes R3 and R4,
press in on the lever located on the left side of the fan
mount, and rotate the fan up and out.
4. Disconnect the fan cable.
5. Install the new fan by reversing Steps 2 to 4.
6. Restore power.
To replace the main fan for frame sizes R5 and R6, perform
the following (see Fig. E):
1. Remove power from drive.
2. Remove the screws attaching the fan.
3. Disconnect the fan cable.
4. Install the fan in reverse order.
5. Restore power.
INTERNAL ENCLOSURE FAN REPLACEMENT — The
VFD IP 54 / UL Type 12 enclosures have an additional internal
fan to circulate air inside the enclosure.
To replace the internal enclosure fan for frame sizes R1 to
R4, perform the following (see Fig. F):
1. Remove power from drive.
2. Remove the front cover.
MAINTENANCE INTERVAL
Heat Sink Temperature
Check and Cleaning
Every 6 to 12 months (depending
on the dustiness of the environment)
Main Cooling Fan
Replacement
Every five years
Internal Enclosure Cooling
Fan Replacement
Every three years
Capacitor Change
(Frame Size R5 and R6)
Every ten years
HVAC Control Panel
Battery Change
Every ten years
3
3
4
2
3
2
Bottom View (R5)
2
3
Bottom View (R6)
Fig. D — Main Fan Replacement
(Frame Sizes R1-R4)
Fig. E — Main Fan Replacement
(Frame Sizes R5 and R6)