Manitowoc Ice CM MODEL STH003 - Manual (Page 59)

59
LIQUID LINE THERMISTOR
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)
CAUTION
Use only Manitowoc thermistors.
Check Procedure
Verify that the thermistor resistance is accurate and
corresponding to the high and low temperature ranges.
1. Disconnect the thermistor at the control board.
Connect the 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 aluminum block.
IMPORTANT
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/resistance
chart.