Carrier WeatherExpert 48N2 Controls, Start-Up, Operation, Service, And Troubleshooting page 239

MAINTENANCE
Heat Sink Temperature Check and Cleaning
Main Cooling Fan Replacement
Internal Enclosure Cooling Fan Replacement
Capacitor Change (Frame Size R5 and R6)
HVAC Control Panel Battery Change
3
4
2
Fig. D — Main Fan Replacement
(Frame Sizes R1-R4)
INTERNAL ENCLOSURE FAN REPLACEMENT
The VFD IP 54 / UL Type 12 enclosures have an additional in-
ternal 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 4 clips toward the center
to release the barbs.
4. When the clips/barbs are free, pull the housing up to
remove 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
right-rear corner; and the fan cable connects just forward of
the fan at the top of the drive.
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.
CONTROL PANEL CLEANING
Use a soft damp cloth to clean the control panel. Avoid harsh
cleaners, which could scratch the display window.
APPENDIX D — VFD INFORMATION (CONT)
Table I — Maintenance Intervals
3
239
Every 6 to 12 months (depending on the dustiness of the environment)
Every 5 years
Every 3 years
Every 10 years
Every 10 years
Bottom View (R5)
2
Bottom View (R6)
2
Fig. E — Main Fan Replacement
(Frame Sizes R5 and R6)
Fig. F — Internal Enclosure Fan Replacement
BATTERY REPLACEMENT
A battery is only used in assistant control panels that have the
clock function available and enabled. The battery keeps the
clock operating in memory during power interruptions. The ex-
pected life for the battery is greater than 10 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.
INTERVAL
3
3