Liquid Line Thermistor; Ude0065 - Welbilt Manitowoc NEO UDE0065A Technician's Handbook

LIQUID LINE THERMISTOR

UDE0065

Function
The liquid line thermistor senses the refrigeration system
liquid line temperature. This is used in conjunction with
the control board to determine the length of the freeze
and harvest cycles.
Specifications
10,000 Ohms +/- 2% at 25°C (77°F)
Check Procedure
Verify that the thermistor resistance is accurate and
corresponds to the high and low temperature ranges.
1. Disconnect the thermistor at the control board.
Connect an ohmmeter to the isolated thermistor wire
leads.
2. Using a temperature meter capable of taking readings
on curved copper lines, attach the temperature
meter sensing device to the liquid line next to the
thermistor.
Do not simply "insert" the sensing device under the
insulation. It must be attached to and reading the
actual temperature of the copper liquid line.
3. With the ice machine running, verify that the
temperature of the discharge line (step 2)
corresponds to the thermistor resistance reading
(step 1) as stated in the temperature/resistant chart.
If the thermistor would fail closed, the light on the
control board will flash rapidly. If the thermistor would
fail open, the light on the control board will flash
slowly.
Part Number 000014797 Rev02 05/19



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