USER GUIDE
Troubleshooting - Extended 1
u-line.com
SAFETY • INSTALLATION & INTEGRATION • OPERATING INSTRUCTIONS • MAINTENANCE •
SERVICE
Troubleshooting - Extended
SPECIFIC ERRORS AND ISSUES
The technically advanced diagnostic capabilities of the
electronic controls utilized on the 1200 and 2200 series
units allows for easy and thorough troubleshooting.
Navigation of the control is the key and is explained in the
CONTROL OPERATION section of the manual, along with
control button layout, control function descriptions, a
service mode menu and service menu selection
explanations.
Verification of temperature and thermistor performance
can be identified by directly viewing thermistor readings in
the service mode.
Component failure issues can be identified through service
mode menu #19, “Component Testing.” Individual
components can be switched on and off to check for both
proper function of a specific component and also delivery
of supply voltage to the components through the relays
and DC outputs located on the relay/power board.
Included in this section are some diagnostic tips and of
course, if additional help is required please contact the
U-Line Corp, “Customer Care Facility” at +1.800.779.2547
for assistance.
CAUTION
!
Never attempt to repair or perform maintenance
on the unit until the main electrical power has
been disconnected from the unit.
TROUBLESHOOTING GUIDE
Concern
Potential Causes
Suggested Remedy
Not Cooling
Compressor overheating
Verify proper air flow through condenser. Is condenser clean?
Confirm condenser fan operation.
Confirm proper compressor operating voltage. Use #19, Component
Testing in Service Mode.
Compressor not operating
Confirm proper compressor operating voltage. Use #19, Component
Testing in Service Mode.
Test overload and relay, replace as needed.
Compressor operating - no cooling
Refer to Refrigeration System Diagnosis Guide.
Evaporator fan not operating
Use #19, Component Testing in Service Mode.
Frozen Product
Control set too cold
Adjust Set Point Temp accordingly.
Review logged error codes
Refer to #14, Error Log in Service Mode.
Thermistor failure
Check Error Log in Service Mode, OHM thermistor.
Frost Buildup
Inside Unit
Door Ajar or Restricted from Closing
Check door clearance to adjoining cabinetry. Check distribution of
product in unit.
Evaporator fan not operating
Use #19, Component Testing in Service Mode.
Thermistor failure
Check Error Log.
Display Not
Working
Unit placed in Sabbath mode?
Press and hold
for 5 seconds to check.
Display unplugged
Verify that both ends of the display wiring are firmly connected.
Display wiring broken or damaged
Perform continuity test of wiring and replace as needed.
Internal Lights
Not Working
Control Setting
Unit set to Sabbath Mode. Press and hold
for 5 seconds to check.
Door switch misaligned or defective
Check the function of reed switch and door magnet adjustment.
Noisy
Refrigeration tubing touching cabinet
Carefully reposition tubing.
Fan blade obstruction (wiring, foam
insulation, packaging material)
Remove obstruction.
