Troubleshooting
VVT Bypass Controller
Carrier Proprietary and Confidential
CARRIER CORPORATION ©2017
Installation and Start-up Guide
All rights reserved
25
If Run LED shows...
And Error LED shows...
Status is...
On
On
Failure. Try the following solutions:
•
Turn the VVT Bypass Controller off, then on.
•
Format the VVT Bypass Controller.
•
Download memory to the VVT Bypass
Controller.
•
Replace the VVT Bypass Controller.
To get the serial number
If you need the VVT Bypass Controller's serial number when troubleshooting, the number is on:
•
a sticker on the back of the main controller board
•
a Module Status report (Modstat) under
Core
(or
Main
)
board hardware
To obtain a modstat in the WebCTRL® interface:
1
Select the VVT Bypass Controller in the navigation tree.
2
Right-click and select
Module Status
.
To restore factory defaults
CAUTION
This erases all archived information and user-configuration settings. You will have to
reconfigure all custom settings. It is recommended to restore the factory defaults only under the guidance of
Carrier Control Systems Support.
To erase volatile memory data and restore factory default configuration settings:
1
Pull the screw terminal connector from the controller's power terminals labeled
Gnd
and
24 Vac
. Make
sure the address switches are not set to 0, 0.
2
Short the
Factory Default Short pins
jumper’s pins and maintain the short for steps 3 and 4.
3
Insert the power screw terminal connector into the VVT Bypass Controller's power terminals.
4
Continue to short the jumper until the
Error
LED flashes three times in sync with the
Run
LED.
5
Remove the short.