Reed Switch; Thermistor Failure - U-Line U-3045WCINT-60B User Manual & Service Manual

USER GUIDE
SAFETY • INSTALLATION & INTEGRATION • OPERATING INSTRUCTIONS • MAINTENANCE •
THERMISTORS
Thermistors are used for various temperature readings.
Thermistors provide reliable temperature readings using a
resistance which varies based on surrounding
temperatures. If a faulty thermistor is suspected it may
be tested using an accurate ohmmeter. In an ice water
bath (32°F) resistance should measure 16.1 kilohms.
5K OHMS @ 77°
16.1K OHMS - 32°F ambient

THERMISTOR FAILURE

Limp Mode Data Table
Mode ON
Beverage/Drinks 10 min.
Market/Fresh 10 min.
Root 5 min.
Pantry 10 min.
Deli 10 min.
Zone Thermistor
If the zone thermistor fails, the unit will continue to
operate in a timed limp mode which varies by model. The
unit will otherwise operate normally. The error will be
displayed in the error log.
Evaporator Thermistor
If the evaporator thermistor fails, the unit will rely on a
preset defrost time during defrost cycles. The unit will
otherwise operate normally. Evaporator thermistor errors
will be displayed in the error log.
Always assure that all thermistor connections are clean
and dry. Whenever opening a thermistor connection be
sure to apply a fresh dab of die electric grease.

REED SWITCH

A reed switch is used to monitor door state. When the
door is closed magnetic force pulls the reed to its contact
and closes the circuit which turns the light and display off.
When the door is open the reed pulls away from the
contact and opens the circuit. If the door is left open for
longer than 5 minutes, the switch will trigger an error code
and set an audible warning.
OFF
45 min.
45 min.
90 min.
45 min.
45 min.
65
Magnet Away From Switch
(Door Open)
(Switch Open)
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SERVICE
Magnet Close To Switch
(Door Closed)
(Switch Closed)
Troubleshooting - Extended 6