APPENDIX C — VFD INFORMATION (cont)
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.
3.The housing that holds the fan in place has barbed retain- ing clips at each corner. Press all four clips toward the center to release the barbs.
4.When the clips/barbs are free, pull the housing up to re- move from the drive.
5.Disconnect the fan cable.
6.Install the fan in reverse order, noting the following: the fan airflow is up (refer to arrow on fan); the fan wire harness is toward the front; the notched housing barb is located in the
To replace the internal enclosure fan for frame sizes R5 or R6, perform the following:
1.Remove power from drive.
2.Remove the front cover.
3.Lift the fan out and disconnect the cable.
4.Install the fan in reverse order.
5.Restore power.
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3 4 
2
Fig. D — Main Fan Replacement
(Frame Sizes
Bottom View (R5)
3
2
| |
Bottom View (R6) | 3 |
| |
2 |
|
|
Fig. E — Main Fan Replacement
(Frame Sizes R5 and R6)
CONTROL PANEL CLEANING — Use a soft damp cloth to clean the control panel. Avoid harsh cleaners which could scratch the display window.
BATTERY REPLACEMENT — A battery is only used in as- sistant control panels that have the clock function available and enabled. The battery keeps the clock operating in memory during power interruptions. The expected life for the battery is greater than ten years. To remove the battery, use a coin to rotate the battery holder on the back of the control panel. Replace the battery with type CR2032.
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