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
 
204  Part Number: 000015430 Rev 02 5/20
IT0300 SERIES
IT0300A
Self-Contained Air-Cooled Model
Characteristics vary depending on operating conditions.
CYCLE TIMES
Freeze Time + Harvest Time = Total Cycle Time
Air Temp. 
Entering 
Condenser °F/°C
Freeze Time
Harvest 
Time ¹
Water Temperature °F/°C
50/10 70/21 90/32
70/21 9.6-11.5 10.8-12.9 12.3-14.6
1-2.5
80/27 10.6-12.6 12.3-14.6 13.5-16.0
90/32 11.8-14.0 13.9-16.4 15.0-17.7
100/38 13.2-15.7 14.6-17.3 16.2-19.2
110/43 15.0-17.7 15.8-18.7 17.7-20.9
1  Times in minutes
24 HOUR ICE PRODUCTION
Air Temp. Entering 
Condenser °F/°C
Water Temperature °F/°C ¹
50/10 70/21 90/32
70/21 310 280 250
80/27 285 250 230
90/32 260 225 210
100/38 235 215 195
110/43 210 200 180
1  Based on average ice slab weight of 2.40 - 2.80 lb.
OPERATING PRESSURES
Air Temp 
Entering 
Condenser 
°F/°C
Freeze Cycle Harvest Cycle
Discharge 
Pressure 
PSIG
Suction 
Pressure 
PSIG ¹
Discharge 
Pressure 
PSIG
Suction 
Pressure 
PSIG
50/10 260-340 70-40 155-180 145-165
70/21 265-340 85-40 155-200 140-175
80/27 300-380 85-41 160-200 145-175
90/32 330-395 90-42 170-200 150-175
100/38 430-490 95-44 210-240 185-220
110/43 430-515 105-48 215-240 185-220
1  Suction pressure drops gradually throughout the freeze cycle










