Troubleshooting
TruVu™ VAVB3
-E2
CARRIER CORPORATION ©2022
Installation and Start-up Guide
All rights reserved
105
To replace the TV-VAVB3-E2's fuse
The TV-VAVB3-E2 has one fuse. If the TV-VAVB3-E2's power
LED is not lit, this could be due to a blown power
fuse.
If you suspect a fuse is blown, remove the fuse as described below, and use a multimeter to check it. If the fuse is
blown, try to determine why it blew before you replace it. Check the power wiring polarity of the TV-VAVB3-E2 and
any other devices that share the power supply. Use the same polarity for all of them.
You can purchase the 3 A, fast-acting, 5mm x 20mm glass fuse from Littelfuse, mfr part #0235003.HXP.
To replace the fuse:
1
Remove the cover to remove the red power connector.
2
Press a small flathead screwdriver into the fuse slot, press inward, and turn the screw ¼ turn counter-
clockwise. This springs the fuse holder slightly away from the controller.
3
Remove the fuse holder.
4
Remove the blown fuse from the fuse holder.
5
Insert the new fuse into the fuse holder.
6
Place the fuse holder back into the TV-VAVB3-E2 and turn it ¼ turn clockwise.
7
Replace the power connector and cover.
8
Verify the
LEDs on the TV-VAVB3-E2 are lit.
To revert to default settings
WARNING
This erases all archived information and user-configuration settings. When recovery is complete,
you have to reconfigure all custom settings. You must connect locally to the TV-VAVB3-E2 and manually
reconfigure all the communications and firewall information. We highly recommend that you revert the defaults
settings only under the guidance of Carrier Control Systems Support.
To erase volatile memory data and restore factory default configuration settings, use AppLoader to download the
appropriate clipping.
See the
AppLoader User Guide
for details.
