User Guide & Service Manual
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 3000 series units allows 
for easy and thorough trouble shooting.
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 actual temperature 
readings in the service mode.
Component failure issues can be identified through service 
mode menu selection, “Relay Toggle” 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 is some diagnostic tips and as 
always, 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.
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