Section 6Electrical System
6-42
CHECKING THE PTCR
WARNING
Disconnect electrical power to the entire ice
machine at the building electrical disconnect box
before proceeding.
1. Visually inspect the PTCR. Check for signs of
physical damage.
NOTE: The PTCR case temperature may reach 210°F
(100°C) while the compressor is running. This is
normal. Do not change a PTCR just because it is hot.
2. Wait at least 10 minutes for the PTCR to cool to
room temperature.
3. Remove the PTCR from the ice machine.
4. Measure the resistance of the PTCR as shown
below. If the resistance falls outside of the
acceptable range, replace it.
Model
Manitowoc
Part Number
Cera-Mite
Part Number
Room
Temperature
Resistance
J200
J250
J320
J420
J450
8505003 305C20 22-50 Ohms
J600
J800
J1000
8504993 305C19 18-40 Ohms
J1300
J1800
8504913 305C9 8-22 Ohms
Manitowoc PTCR’s 8505003 & 8504993
Manitowoc PTCR 8504913
SV1541
SV1540
LEAVE JUMPER
WIRE IN PLACE
MEASURE OHMS BETWEEN
CENTER TAB AND END TAB
MEASURE OHMS
BETWEEN END TABS
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