U-Line U-3018CLR User Manual & Service Manual page 52

USER GUIDE
SAFETY • INSTALLATION & INTEGRATION • OPERATING INSTRUCTIONS • MAINTENANCE •
MAIN CONTROL
The main control board is very robust and is rarely the
cause of system issues. It is important to fully diagnose
the board for any suspected failures before attempting to
remove the board for replacement or service. Follow the
guidelines below to fully test and diagnose the main
control.
Power Fault
If the unit does not (or seems to not) power on, follow the
flow chart below to help diagnose the issue. Before
beginning it is important to first verify the unit is not
simply set to sabbath mode.
Check Voltage
No Voltage
At Wall Outlet
Voltage
Verify Voltage
At Main Control
No Voltage
Voltage Input
Voltage
Check Fuse F1
No Continuity
For Continuity
Continuity
Connect Test Display
To J5.
Operating
Cycle Power And
Check For Operation
Not Operating
Is the door open? The
Yes
Display will not activate
while the door is closed
No
No
Open Door.
Is the UI Now
Functional?
Yes
Alert Customer
Of Power Failure
Replace
Power Cord
Replace
Fuse
Inspect Customer UI
and Data Cable
Is the Reed
Replace Reed
Switch Operating
No
Switch.
Properly?
Yes
Replace Main
Board
u-line.com
SERVICE
Troubleshooting - Extended 3