Main Control; Power Fault - U-Line 2224BEV User Manual & Service Manual

USER GUIDE
SAFETY • INSTALLATION & INTEGRATION • OPERATING INSTRUCTIONS • MAINTENANCE •
SERVICE
Compressor operating - no cooling
Evaporator fan not operating
Frozen Control set too cold
Product
Review logged error codes
Thermistor failure
Frost Buildup Door Ajar or Restricted from Closing
Inside Unit
Evaporator fan not operating
Thermistor failure
Display Not Unit placed in Sabbath mode?
Working
Display unplugged
Display wiring broken or damaged
Internal Lights Control Setting
Not Working
Door switch misaligned or defective
Noisy Refrigeration tubing touching cabinet
Fan blade obstruction (wiring, foam
insulation, packaging material)

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.
Test overload and relay, replace as needed.
Refer to System Diagnosis Guide.
Use #19, Component Testing in Service Mode.
Adjust Set Point Temp accordingly.
Refer to #14, Error Log in Service Mode.
Check Error Log in Service Mode, OHM thermistor.
Check door clearance to adjoining cabinetry. Check distribution of
product in unit.
Use Relay Toggle, Component Testing in Service Mode.
Check Error Log.
Press and hold for 5 seconds to check.
Verify that both ends of the display wiring are firmly connected.
Perform continuity test of wiring and replace as needed.
Unit set to Sabbath Mode. Press and hold
check.
Check the function of reed switch and door magnet adjustment.
Carefully reposition tubing.
Remove obstruction.
for 5 seconds to
Troubleshooting - Extended 2
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