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Press & release POWER key.
Check switch electrical connections. Check
for power to / from switch. Reconnect or
replace switch if defective.
If power from switch and relay, replace light
strips.
Check for power at E3 of control board. If no
power, replace board.
Check control panel ribbon cable at control
panel (silver area of terminal away from con-
trol board). Plug in correctly if incorrect.
SEE CONTROL PANEL TEST PROCEDURE
AT BACK OF TROUBLESHOOTING GUIDE
SECTION.
Press POWER key
Check LED ribbon cable. Plug in correctly if
incorrect.
Replace Control Board
Replace Control Board
Replace Control Board
Replace Control Panel Assembly
SEE INSTALLATION MANUAL
6-12
PROBLEM
POSSIBLE CAUSE
TEST / ACTION
#7040748 - Revision A - September, 2016
Troubleshooting Guides
MODEL UW-24
MODEL UW-24
I.
NO LIGHTS
J.
CONTROL PANEL KEYS
MALFUNCTIONING
K. NO LED’s
L.
ALL LED’s LIT
M. SAME LED SEGMENTS
MISSING FROM BOTH DIS-
PLAY WINDOWS
N. LED SEGMENTS MISSING
FROM ONLY ONE DISPLAY
WINDOWS
O. DOOR / UNIT UN-LEVEL
Unit in Sabbath Mode
Door Switch Disconnected or
Malfunctioning
Light Strips Burned-out
No Power from Control Board
Control Panel Ribbon Cable Plugged in
Wrong
Control Panel or Ribbon Cable
Defective (OR) No Signal Read at
Control Board
Unit Switched OFF
LED Ribbon Cable Plugged in Wrong
No Data from Control Board
Bad Data from Control Board
Bad Data from Control Board
Bad LED Board in Control Panel
Door or unit needs adjustment
