Troubleshooting Extended - U-Line 1224R User Manual

USER GUIDE
SAFETY • INSTALLATION & INTEGRATION • OPERATING INSTRUCTIONS • MAINTENANCE •
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.
TROUBLESHOOTING GUIDE
Concern Potential Causes
Not Cooling Compressor overheating
Compressor not operating
Compressor operating - no cooling
Evaporator fan not operating
Frozen Product Control set too cold
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)
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.
Suggested Remedy
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.
Confirm proper compressor operating voltage. Use #19, Component
Testing in Service Mode.
Test overload and relay, replace as needed.
Refer to Refrigeration 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 #19, Component Testing in Service Mode.
Check Error Log.
Push 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. Push
Check the function of reed switch and door magnet adjustment.
Carefully reposition tubing.
Remove obstruction.
u-line.com
SERVICE
and hold for 5 seconds to check.
Troubleshooting - Extended 1