Appendix A • Vission 20/20 Troubleshooting Guide - Emerson Vilter Vission 20/20 Operation And Service Manual

Appendix A • Vission 20/20 Troubleshooting Guide
Vission 20/20 Troubleshooting Guide
In the event of a problem with the Vilter Vission 20/20, the help screen, along with your electrical drawings will help
determine the cause.
Problem
Vission 20/20 does not boot up, no
lights light on any boards.
Vission 20/20 appears to be boot-
ed, lights are lit on the boards, but
no touchscreen display is evident:
Vission 20/20 boots up but all data
temperatures and pressures are ze-
roed and do not update.
Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.9
NOTICE
Before applying power to the Vission 20/20 control
panel, all wiring to the panel should be per the
National Electrical Code (NEC). Specifi cally check for
proper voltage and that the neutral is grounded at
the source. An equipment ground should also be run
to the panel.
Table A. Vission 20/20 Troubleshooting Guide
Check that 120VAC is run to circuit breaker CB1 located on the terminal
strip. The neutral should be brought to any "N" terminal on the terminal
strip.
Check that circuit breaker CB1's switch is in the ON position.
Use a voltmeter to insure 120VAC is being applied to the power supply,
located on the door. Check that 120 volts is present at the F1 fuse on the
power supply, located on the front of the door. If all of the above are OK,
the power supply may be bad. To test the power supply, check DC voltages
at the power supply output. If proper voltages are not found at these test
points, the power supply may be faulty.
Remove power COMPLETELY from the Vission 20/20 and restart the
controller.
The inverter board creates a high rms voltage to drive
the backlight - it can exceed 1500VAC. Use extreme
caution and insure that voltage has been removed
from the board before physical inspection. Visually
check cable connections located on the LCD inverter
board. This board is located inside the door on the
LCD touch screen back plane next to the single board
computer. Physically inspect board to insure that
all cable connectors are connected tightly to the
board connectors. If these are inserted correctly,
the problem could be a bad LCD inverter board or a
Check analog board jumpers to insure proper node addresses are set up
on all boards. Physically inspect power and communication jumper ca-
bles to insure they are inserted properly and completely. Two LEDs on all
boards show the status of the communications for the board. LED1 is on
when a command is received at the board from the single board computer
(SBC), and LED2 is on when a response is sent from the board to the SBC.
Solution
WARNING
component failure.
A - 1