Service Manual
Table Of Contents
- Safety Notices
- Definitions
- General Information
- Installation
- Maintenance
- Operation
- Troubleshooting
- Troubleshooting
- Troubleshooting By Symptom
- Reset To Factory Defaults
- Symptom #1 - Ice Machine Will Not Run
- #2 - Low Production, Long Freeze Cycle
- Symptom #2 - Freeze Cycle Refrigeration System Operational Analysis Tables
- Symptom #3 & #4 - Harvest Problems Self‑contained Air, Water & Remote Condenser Models
- Symptom #3 - Self-Contained Air or Water-cooled
- Symptom #3 - Remote Condenser
- Symptom #4 - Self-Contained Air, Water-Cooled or Remote
- Component Check Procedures
- Electrical Components
- Control Board, Display And Touchscreen
- Control Board Relay Test
- Programming A Replacement Control Board
- USB Flash Drive Specifications and Formatting
- Exporting Data to a Flash Drive
- Upgrading Firmware with a Flash Drive
- Main Fuse
- Bin Switch
- Water Level Control Circuitry
- Ice Thickness Probe (Initiates Harvest)
- Bin Level Probe
- Thermistors
- High Pressure Cutout (HPCO) Control
- Fan Cycle Control
- Harvest Assist Air Pump
- Compressor Electrical Diagnostics
- Diagnosing Start Components
- Refrigeration Components
- Refrigerant Recovery/Evacuation
- System Contamination Clean-Up
- Liquid Line Filter-Driers
- Replacing Pressure Controls Without Removing Refrigerant Charge
- Total System Refrigerant Charge
- Electrical Components
- Charts
- Diagrams
- Wiring Diagrams
- Wiring Diagram Legend
- IF0300/IT0420/IT0450/IT0500/IT0620/IT0750 1ph Air/Water
- IT0500/IT1200 - 1ph Remote Air-Cooled
- IF0600/IF0900/IT0900/IT1200 - 1ph Air/Water
- IF0600/IF0900/IT0900/IT1200 - 3ph Air/Water
- IT1500/IT1900 - 1ph Air/Water
- IT1500/IT1900 - 3 ph Air/Water
- IF0500/IF0600/IF0900/IT1200/IF1500 - 1ph Remote
- IF0500/IF0600/IF0900/IT1200/IF1500 - 3ph Remote Condenser
- Electronic Control Board
- Refrigeration Tubing Schematics
- Wiring Diagrams
Part Number: 000015430 Rev 02 5/20 157
THERMISTORS
FUNCTION
Thermistor resistance values change with temperature.
The value supplied to the control board is used to identify
temperature at the thermistor location.
SPECIFICATIONS
Temperature of Thermistor Resistance
°C °F K Ohms (x 1000)
-30° – -20° -22° – -4° 820.85 – 466.35
-20° – -10° -4° – 14° 466.35 – 269.05
-10° – 0° 14° – 32° 269.05 – 160.70
0° – 10° 32° – 50° 160.70 – 98.930
10° – 20° 50° – 68° 98.930 – 62.015
20° – 30° 68° – 86° 62.015 – 39.695
30° – 40° 86° – 104° 39.695 – 25.070
40° – 50° 104° – 122° 25.070 – 17.481
50° – 60° 122° – 140° 17.481 – 11.860
60° – 70° 140° – 158° 11.860 – 8.1900
70° – 80° 158° – 176° 8.1900 – 5.7530
80° – 90° 176° – 194° 5.7530 – 4.1015
90° – 100° 194° – 212° 4.1015 – 2.9735
100° – 110° 212° –230° 2.9735 – 2.1885
110° – 120° 230° – 248° 2.1885 – 1.6290
120° – 130° 248° – 266° 1.6290 – 1.2245
130° – 140° 266° – 284° 1.2245 – 0.9319
140° – 150° 284° – 302° 0.9319 – 0.7183
150° – 160° 302° – 320° 0.7183 – 0.5624
160° – 170° 320° – 338° 0.5624 – 0.4448
170° – 180° 338° – 356° 0.4448 – 0.3530
180° – 190° 356° – 374° 0.3530 – 0.2831
190° – 200° 374° – 392° 0.2831 – 0.2273