Manitowoc Ice RF2379R Service Manual

Manitowoc

R Model

Flake & Nugget

Technician’s

Handbook

This manual is updated as new information and models

are released. Visit our website for the latest manual.

America’s #1 Selling Ice Machine

Part Number 000007661 6/13

www.manitowocice.com

Safety Notices

Warning

Caution

As you work on Manitowoc equipment, be sure to pay close attention to the safety notices in this handbook. Disregarding the notices may lead to serious injury and/or damage to the equipment.

Throughout this handbook, you will see the following types of safety notices:

Text in a Warning box alerts you to a potential personal injury situation. Be sure to read the Warning statement before proceeding, and work carefully.

Text in a Caution box alerts you to a situation in which you could damage the equipment. Be sure to read the Caution statement before proceeding, and work carefully.

Procedural Notices

Important

As you work on Manitowoc equipment, be sure to read the procedural notices in this handbook. These notices supply helpful information which may assist you as you work.

Throughout this handbook, you will see the following types of procedural notices:

Text in an Important box provides you with information that may help you perform a procedure more efficiently. Disregarding this information will not cause damage or injury, but it may slow you down as you work.

NOTE: T ext set off as a Note provides you with simple, but useful, extra information about the procedure you are performing.

Read These Before Proceeding:

Caution

Important

Warning

! Warning

Proper installation, care and maintenance are essential for maximum performance and troublefree operation of your equipment. Visit our website www.manitowocfsg.com for manual updates, translations, or contact information for service agents in your area.

Routine adjustments and maintenance procedures outlined in this handbook are not covered by the warranty.

Read this manual thoroughly before operating, installing or performing maintenance on the equipment. Failure to follow instructions in this manual can cause property damage, injury or death.

Do not use electrical appliances or accessories other than those supplied by Manitowoc for your ice machine model.

Two or more people or a lifting device are required to lift this appliance.

! Warning

This equipment contains high voltage electricity

! Warning

Warning

and refrigerant charge. Installation and repairs are to be performed by properly trained technicians aware of the dangers of dealing with high voltage electricity and refrigerant under pressure.The technician must also be certified in proper refrigerant handling and servicing procedures. All lockout and tag out procedures must be followed when working on this equipment.

Do not damage the refrigeration circuit when installing, maintaining or servicing the unit.

Do not operate equipment that has b een misused, abused, neglected, damaged, or altered/modified from that of original manufactured specifications. This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision concerning use of the appliance by a person responsible for their safety. Do not allow children to play with this appliance.

All covers and access panels must be in place and properly secured, before operating this equipment.

Warning

Do not obstruct machine vents or openings.

! Warning

Do not store gasoline or other flammable vapors or liquids in the vicinity of this or any other appliance.

Do not clean with water jet.

It is the responsibility of the equipment owner to perform a Personal Protective Equipment Hazard Assessment to ensure adequate protection during maintenance procedures.

Two or more people are required to move this equipment to prevent tipping.

! Warning

When using electric appliances, basic precautions must always be followed, including the following:

a. Read all the instructions before using

the appliance.

b. To reduce the risk of injury, close

supervision is necessary when an

appliance is used near children. c. Do not contact moving parts. d. Only use attachments recommended or

sold by the manufacturer. e. Do not use outdoors.

f. For a cord-connected appliance, the

following must be included:

• Do not unplug by pulling on cord. To unplug, grasp the plug, not the cord.

• Unplug from outlet when not in use and before servicing or cleaning.

• Do not operate any appliance with a damaged cord or plug, or after the appliance malfunctions or is dropped or damaged in any manner. Contact the nearest authorized service facility for examination, repair, or electrical or mechanical adjustment.

g. Follow applicable lock out tag out

procedures before working on equipment.

h. Connect to a properly grounded outlet

only.

Table of Contents

General Information

Model Numbers . . . . . . . . . . . . . . . . . . . . .15

Self Contained 

Air & Water-Cooled Models . . . . . . . . .15

QuietQube Models with Remote

Condensing Units . . . . . . . . . . . . . . . .16

Rack Units . . . . . . . . . . . . . . . . . . . . . .16

Model/Serial Number . . . . . . . . . . . . . . . .17

Manitowoc Cleaner and Sanitizer . . . . . .17

Ice Machine Warranty Information . . . . .17

Installation

Installation Requirements . . . . . . . . . . . .19

Potable Water Requirements . . . . . . . . . .20

Drain Connections . . . . . . . . . . . . . . . . . .20

Ice Machine Clearance Requirements . .21

Cooling Tower Applications . . . . . . . . . .21

Electrical Service . . . . . . . . . . . . . . . . . . .22

Voltage . . . . . . . . . . . . . . . . . . . . . . . .22

Fuse/Circuit Breaker . . . . . . . . . . . . . . 22

Ground Fault Interrupter Circuit (GFIC) 22

Operation

Ice Making Sequence of Operation . . . . .23

RF0244/RNS0244/RF0266/RF0385/ RFS0385/RNS0385/RF0388/RF0399 . 23

RF0300 . . . . . . . . . . . . . . . . . . . . . . . .24

RFS0300/RNS0308 . . . . . . . . . . . . . .25

RF0644/RF0650/RF1200/RFS1200/

RF2300/RFS2300 . . . . . . . . . . . . . . . .26

RF1200C/RF2300C . . . . . . . . . . . . . .27

RF1200C/RF2300C . . . . . . . . . . . . . .28

RN0400 . . . . . . . . . . . . . . . . . . . . . . . .29

RN1000/RN1400 . . . . . . . . . . . . . . . . .36

RN1000C/RN1200C . . . . . . . . . . . . . .39

Thermostat Settings . . . . . . . . . . . . . . . . .43

Part Number 000007661 6/13 9

Maintenance

Cleaning and Sanitizing . . . . . . . . . . . . . 45

Exterior Cleaning . . . . . . . . . . . . . . . . 45

RF/RFS/RNS Models Cleaning/Sanitizing

Procedures . . . . . . . . . . . . . . . . . . . . . 46

Parts removal for Cleaning/Sanitizing 52 Ice Chute Removal - RFS & RNS Models

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Ice Chute Removal - RF Models . . . . 56

Ice Chute Switch Actuator Removal . . 57 RN Models Cleaning/Sanitizing Procedure

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Cleaning the Air filter and Condenser . 60

Removal from Service/Winterization . . . 61

Troubleshooting

RF0244/RF0266/RF0385/RFS0385/RF0388/

RF0399 Troubleshooting . . . . . . . . . . . . . 63

Self-Contained Air-Cooled . . . . . . . . . 63

Electrical Diagnostic Flowchart . . . . . . 64

RF0300 Troubleshooting . . . . . . . . . . . . . 69

Self-Contained Air-Cooled . . . . . . . . . 69

Electrical Diagnostic Flowchart . . . . . . 70

RFS0300/RNS0308 Troubleshooting . . . 75

Self-Contained Air-Cooled . . . . . . . . . 75

Electrical Diagnostic Flowchart . . . . . . 76

RF0644/RF0650/RF1200/RFS1200

Troubleshooting . . . . . . . . . . . . . . . . . . . 81

Self-Contained Air-Cooled . . . . . . . . . 81

Rotation Sensor Operation . . . . . . . . . 81

Electrical Diagnostic Flowchart . . . . . . 82

RF1200C/RFS1200C Troubleshooting . . 87

QuietQube Remote Air-cooled Models with

Remote Condensing Unit . . . . . . . . . . 87

Electrical Diagnostic Flowchart . . . . . . 88

10 Part Number 000007661 6/13

RF1200R/RFS1200R Troubleshooting . .94

Head Section For Rack Refrigeration

Systems . . . . . . . . . . . . . . . . . . . . . . .94

Rotation Sensor Operation . . . . . . . . .94

Electrical Diagnostic Flowchart . . . . . .95

RF2300/RFS2300 Troubleshooting . . . . .101

Self-Contained Air-Cooled . . . . . . . . . . 101

Rotation Sensor Operation . . . . . . . . .101

Electrical Diagnostic Flowchart . . . . . . 102

RF2300C/RFS2300C Troubleshooting . .108

QuietQube Remote Air-cooled Models with

Remote Condensing Unit . . . . . . . . . .108

Electrical Diagnostic Flowchart . . . . . . 109

RF2300R/RFS2300R Troubleshooting . .116

Head Section For Rack Refrigeration

systems . . . . . . . . . . . . . . . . . . . . . . . .116

Rotation Sensor Operation . . . . . . . . .116

Electrical Diagnostic Flowchart . . . . . . 117

RN0400 Troubleshooting . . . . . . . . . . . . .124

Over-Torque Failure . . . . . . . . . . . . . . 124

Water Loss Failure . . . . . . . . . . . . . . .127

Electrical Diagnostic Flowchart . . . . . . 128

RN1000/RN1400 Troubleshooting . . . . . . 133

Indicator Light Operation . . . . . . . . . . .133

Control Board Errors . . . . . . . . . . . . . .136

Electrical Diagnostic Flowchart . . . . . . 138

RN1000C/RN1200C Troubleshooting . . . 146

Indicator Light Operation . . . . . . . . . . .146

Control Board Errors . . . . . . . . . . . . . .149

Electrical Diagnostic Flowchart . . . . . 151

Refrigeration Troubleshooting . . . . . . . .161

Capillary Tube Models . . . . . . . . . . . . .161

Thermostatic Expansion Valve Models 162

Part Number 000007661 6/13 11

Charts

Total System Refrigerant Charge . . . . . . 163

Ice Production & Refrigerant Pressure . 164

Flake Models . . . . . . . . . . . . . . . . . . . . . . 165

RF0244A & RFS0244 . . . . . . . . . . . . . 165

RF0266A . . . . . . . . . . . . . . . . . . . . . . 166

RF0300A & RFS0300A . . . . . . . . . . . 167

RF0385A . . . . . . . . . . . . . . . . . . . . . . 168

RF0388A . . . . . . . . . . . . . . . . . . . . . . 169

RF0399A . . . . . . . . . . . . . . . . . . . . . . 170

RF0644A . . . . . . . . . . . . . . . . . . . . . . 171

RF0650A & RFS0650 . . . . . . . . . . . . . 172

RF0650W . . . . . . . . . . . . . . . . . . . . . . 173

RF1200A & RFS1200A . . . . . . . . . . . 174

RF1200W & RFS1200W . . . . . . . . . . 175

RF1278C & RFS1278C With RCU1075 176

RF2300A . . . . . . . . . . . . . . . . . . . . . . 177

RF2300W . . . . . . . . . . . . . . . . . . . . . . 178

RF2378C & RFS2378C with RCU2375 179

Nugget Models . . . . . . . . . . . . . . . . . . . . . 180

RNS0244A . . . . . . . . . . . . . . . . . . . . . 180

RNS0308A . . . . . . . . . . . . . . . . . . . . . 181

RNS0385A . . . . . . . . . . . . . . . . . . . . . 182

RN0408A . . . . . . . . . . . . . . . . . . . . . . 183

RN1008A . . . . . . . . . . . . . . . . . . . . . . 184

RN1009W . . . . . . . . . . . . . . . . . . . . . . 185

RN1408A . . . . . . . . . . . . . . . . . . . . . . 186

RN1409W . . . . . . . . . . . . . . . . . . . . . . 187

RN1078C With RCU1075 . . . . . . . . . . 188

RN1278C With RCU1275 . . . . . . . . . . 189

Rack Models . . . . . . . . . . . . . . . . . . . . . . . 190

RF1279R . . . . . . . . . . . . . . . . . . . . . . 190

RFS1279R . . . . . . . . . . . . . . . . . . . . . 191

RF2379R . . . . . . . . . . . . . . . . . . . . . . 192

RFS2379R . . . . . . . . . . . . . . . . . . . . . 193

12 Part Number 000007661 6/13

Diagrams

Wiring Diagrams . . . . . . . . . . . . . . . . . . . .195

Flake Models . . . . . . . . . . . . . . . . . . . . . . .196

RF0244/RNS0244/RF0266/RF0385/ RNS0385/RF0388/RF0399 Air-Cooled 196

RF0300 Air-Cooled . . . . . . . . . . . . . . .198

RFS0300 Air-Cooled . . . . . . . . . . . . . .200

RF0650/RF1200/RFS1200 Air-Cooled 202

RF1200/RFS1200 Water-Cooled . . . .204

RF1200C/RFS1200C QuietQube Head

Section . . . . . . . . . . . . . . . . . . . . . . . .206

RF2300/RFS2300 Air-Cooled & Water-

cooled . . . . . . . . . . . . . . . . . . . . . . . . .208

RF2378C/RFS2378C QuietQube Head

Section . . . . . . . . . . . . . . . . . . . . . . . .210

Condensing Units . . . . . . . . . . . . . . . . . . .212

RCU Condensing Unit 1ph . . . . . . . . . 212

RCU Condensing Unit 3ph . . . . . . . . . 213

Rack Models . . . . . . . . . . . . . . . . . . . . . . .214

RF1279R/RFS1279R Head Section . . 214 RF2379R/RFS2379R Head Section . . 216

Nugget Models . . . . . . . . . . . . . . . . . . . . .218

RNS0244/RNS0385 Air-Cooled . . . . .218

RNS0308 Air-Cooled . . . . . . . . . . . . . .220

RN0400 115v/60hz/1ph . . . . . . . . . . .222

RN0400 230v/60hz/1ph . . . . . . . . . . .223

RNS1000 Air-Cooled . . . . . . . . . . . . . .224

RN1000/RN1400 Air & Water Cooled .226 RN1000C/RN1200C QuietQube Head

Section . . . . . . . . . . . . . . . . . . . . . . . .227

Part Number 000007661 6/13 13

Refrigeration Tubing Schematics . . . . . 228

Flake Models . . . . . . . . . . . . . . . . . . . . . . 228

RF0244/RFS0244/RF0266/RF0300/ RF0385/RF0388/RF0399/RF0644/RF0650

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228

RF1200/RFS1200 Air-cooled . . . . . . . 230

RF1200/RFS1200 Water-cooled . . . . 232

RF2300/RFS2300 Air-cooled . . . . . . . 234

RF2300/RFS2300 Water-cooled . . . . 236

RF1200C/RFS1200C QuietQube Head Section & RCU1075 Condensing Unit 238 RF2300C/RFS2300 QuietQube Head Section & RCU2375 Condensing Unit 240

Nugget Models . . . . . . . . . . . . . . . . . . . . . 242

RN0244/RNS0244/RN0385/RNS0385 

Air & Water-cooled . . . . . . . . . . . . . . . 242

RNS0308 . . . . . . . . . . . . . . . . . . . . . . 244

RN0400/RN1000/RN1400 Air & Water-

cooled . . . . . . . . . . . . . . . . . . . . . . . . . 246

RN1000C/RN1200C QuietQube Head Section & RCU1075/RCU1275 Condensing

Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 248

14 Part Number 000007661 6/13

General Information

Model Numbers

SELF CONTAINED  AIR & WATER-COOLED MODELS

Flake Models

Self Storage

Air-Cooled

RF0244A – – – RF0266A – – – RF0385A – – – RF0388A – – – RF0399A – – –

– – RF0300A – – – RFS0300A –

RF0644A – –

– – RF0650A RF0650W – – RFS0650A RFS0650W – – RF1200A RF1200W – – RFS1200A RFS1200W – – RF2300A RF2300W

Self Storage

Water-Cooled

Nugget Models

Self Storage

Air-Cooled

RNS0244A – – –

-- – RNS0308A –

RNS0385A – – –

RN0408A – – –

– – RNS1008A – – – RN1008A RN1009W – – RN1408A RN1409W

Self Storage

Water-Cooled

Modular

Air-Cooled

Modular

Air-Cooled

Modular

Water-

Cooled

Modular

Water-

Cooled

Part Number 000007661 6/13 15

QUIETQUBE MODELS WITH REMOTE CONDENSING UNITS

Flake Models

QuietQube Head

RF1278C RCU1075

RFS1278C RCU1075

RF2378C RCU2375

RFS2378C RCU2375

RCU Remote

Condensing Unit

Nugget Models

QuietQube Head

RN1078C RCU1075 RN1278C RCU1275

RCU Remote

Condensing Unit

RACK UNITS

Flake Models

Head Section

RF1279R Supplied by Others

RFS1279R Supplied by Others

RF2379R Supplied by Others

RFS2379R Supplied by Others

Rack Remote

Condensing Unit

NOTE: Rack units share a common refrigeration circuit with other equipment, such as display cases and glass door freezer displays. Rack units have been modified to function with rack systems and will not function correctly with RCU condensing units.

16 Part Number 000007661 6/13

Model/Serial Number

These numbers are required when requesting information from your local Manitowoc Distributor, or Manitowoc Ice. The model and serial number are listed on the MODEL/SERIAL NUMBER DECAL affixed to the ice machine.

Manitowoc Cleaner and Sanitizer

Manitowoc Ice Machine Cleaner and Sanitizer are available in 16 oz. (473 ml) bottles. These are the only cleaner and sanitizer approved for use with Manitowoc products.

Cleaner Part Number Sanitizer Part Number

16 oz. 000000084 16 oz. 9405653

1 gal N/A 1 gal. 9405813

Ice Machine Warranty Information

Warranty information for all ice machine models is available on our website at www.manitowocice.com.

Part Number 000007661 6/13 17

18 Part Number 000007661 6/13

This Page Intentionally Left Blan k

Installation

Installation Requirements

The location selected for the ice machine must meet the following criteria. If any of these criteria are not met, select another location.

• Air temperature: RF or RFS Flake Models - Minimum 50°F (10°C), Maximum 110°F (43°C) RN Nugget Models - Minimum 50°F (10°C), Maximum 100°F (38°C) RNS Nugget Models - Minimum 45°F (7°C), Maximum 110°F (43°C)

• The location must be free of airborne and other contaminants.

• The location must not be near heat-generating equipment or in direct sunlight.

• The location must be capable of supporting the weight of the ice machine and a full bin of ice.

• The location must allow enough clearance for water, drain and electrical connections in the rear of the ice machine.

• The location must not obstruct airflow through or around the ice machine.

• The ice machine and bin must be level.

• Routine adjustments and maintenance procedures outlined in this manual are not covered by the warranty.



Part Number 000007661 6/13 19

Potable Water Requirements

• Plumbing must conform to local codes.

• Water temperature: Minimum 40°F (4°C), Maximum 90°F (32°C).

• Do not connect the ice machine to a hot water supply. Be sure all hot water restrictors installed for other equipment are working. (Check valves on sink faucets, dishwashers, etc.)

• If water pressure exceeds maximum pressure (70

psig [483 kPa] RN1000; 80 psig [552 kPa] for all other models) obtain a water pressure regulator from your Manitowoc distributor.

• A water shut-off valve is required to clean the ice machine.

• A union for both the ice making and condenser water lines is required.

• Water inlet lines require insulation to prevent condensation.

• RF/RFS/RFN Models: A back flow preventer is required on water inlet lines.

Drain Connections

• Drain lines must have a 1.5 inch drop per 5 feet of run (2.5 cm per meter), and must not create traps.

• The floor drain must be large enough to accommodate drainage from all drains.

• Bin drain termination must have an air gap.

• Separate insulated bin and water-cooled condenser drain lines are required.

• The bin and ice machine drains require a vent.

20 Part Number 000007661 6/13

Ice Machine Clearance Requirements

Head

Sections

Back 5" (12.7 cm) 5" (12.7 cm) 0" (0 cm)

Sides/Top 8" (20.3 cm) 8" (20.3 cm) 0" (20 cm)

* Water-Cooled Only - There is no minimum clearan ce required. This

value is recommended for efficient operation and servicing only.

Self-

Contained

Air-Cooled

RCU Units Remote Condensing Unit*

Front/Back 24" (61.0 cm)

Sides/Top 6" (15.2 cm)*

Self-

Contained

Water-Cooled*

QuietQube Air-Cooled

NOTE: Allowance must be made for removal when the ice machine is built-in. Monthly removal of the top panel is required for cleaning and sanitizing.

Cooling Tower Applications

A water cooling tower installation does not require modification of the ice machine. The water regulator valve for the condenser continues to control the refrigeration discharge pressure.

It is necessary to know the amount of heat rejection, and pressure drop through the condenser and water valves (inlet and outlet) when using a cooling tower on an ice machine.

• Water entering the condenser must not be lower than 37°F (3°C) or exceed 90°F (32°C).

• Water flow through the condenser must not exceed 5 gal. (19 L) per minute.

• Allow for a pressure drop of 7 psi (48 kPa) between the condenser water inlet and the outlet of the ice machine.

• Water exiting the condenser must not exceed 110°F (43°C).

Part Number 000007661 6/13 21

Electrical Service

Warning

All wiring must conform to local, state and national codes.

VOLTAGE

The maximum allowable voltage variation is ± 10% of the rated voltage on the ice machine model/serial number plate at compressor start-up.

FUSE/CIRCUIT BREAKER

A separate fuse/circuit breaker must be provided for each ice machine. Circuit breakers must be H.A.C.R. rated (does not apply in Canada).

The ice machine must be grounded in accordance with national and local electrical codes.

GROUND FAULT INTERRUPTER CIRCUIT (GFIC)

A GFCI/GFI circuit protection is not recommended with our equipment. If a GFCI/GFI is required by code a GFCI/GFI breaker rather than outlet must be used to avoid intermittent nuisance trips.

22 Part Number 000007661 6/13

Operation

Ice Making Sequence of Operation

NOTE: Flake ice machines use an auger to remove ice from the evaporator. Occasional noises (creaks, groans, squeaks, or pops) are a normal part of the ice making process.

RF0244/RNS0244/RF0266/RF0385/RFS0385/ RNS0385/RF0388/RF0399

Self-Contained Air-Cooled

When the toggle switch is placed in the “ON” position the following controls must be in the closed position before the ice machine will start:

A. Bin Thermostat B. Low Evaporator Temperature Thermostat C. Low Water Level Switch

Placing the toggle switch in the ON position starts the gear motor and refrigeration system. The float valve controls the water inlet valve and water level. The freeze cycle ends when ice contacts the bin thermostat. The ice machine w ill restart when ice no longer contacts the bin thermostat.

Part Number 000007661 6/13 23

RF0300 Self-Contained Air-Cooled

When the toggle switch is placed in the “ON” position the following controls must be in the closed position before the ice machine will start:

A. Bin Thermostat B. Ice Chute Safety Switch C. Low Water Level Switch D. Low Evaporator Temperature Thermostat

Placing the toggle switch in the ON position starts the gear motor and a 10 minute compressor time delay. The compressor starts and the float valve controls the water inlet valve and water level. The freeze cycle ends when ice contacts the bin thermostat. The ice machine remains off until ice no longer contacts the bin thermostat.

24 Part Number 000007661 6/13

RFS0300/RNS0308 Self-Contained Air-Cooled

When the toggle switch is placed in the “ON” position the following controls must be in the closed position before the ice machine will start:

A. Bin Thermostat B. Ice Chute Safety Switch C. Low Water Level Switch D. High Pressure Cut-out Switch E. Low Pressure Cut-Out Switch

Part Number 000007661 6/13 25

RF0644/RF0650/RF1200/RFS1200/RF2300/ RFS2300

Self-Contained Air-Cooled

When the toggle switch is placed in the ON position the following controls must be in the closed position before the ice machine will start:

A. Bin Thermostat B. High Pressure Cut-out Switch C. Ice Chute Safety Switch D. Low Pressure Switch E. Low Water Level Switch

Placing the toggle switch in the ON position starts the gear motor. After the rotation speed sensor verifies 10 minutes of correct rotation the time delay ends and the compressor starts.The ice machine will continue to make ice until ice contacts the bin thermostat. The ice machine remains off until ice no longer contacts the bin thermostat.

26 Part Number 000007661 6/13

RF1200C/RF2300C QuietQube Remote Air-cooled Models with

Remote Condensing Unit

When the toggle switch is placed in the ON position the following controls must be in the closed position before the ice machine will start:

A. Bin Thermostat B. High Pressure Cut-out Switch C. Ice Chute Safety Switch D. Low Pressure Switch E. Low Water Level Switch

Placing the toggle switch in the ON position starts the gear motor. After the rotation speed sensor verifies 10

minutes of correct rotation the time delay ends and

the liquid line solenoid valve opens.

• When the refrigerant pressure is high enough to close the low-pressure control the contactor coil energizes and the compressor starts.

• The refrigerant pressure will increase and close the fan cycling pressure control and the condenser fan motor starts.

The ice machine will continue to make ice until ice contacts the bin thermostat and the liquid line solenoid valve closes and the refrigeration system pumps down.

• The refrigerant pressure drops and the fan cycling pressure control opens stopping the condenser fan motor.

• When the refrigerant pressure is low enough to open the low pressure control, the contactor coil is de-energized and the compressor stops.

The ice machine remains off until ice no longer contacts the bin thermostat.

Part Number 000007661 6/13 27

RF1200C/RF2300C Head Section with Rack Refrigeration system

When the toggle switch is placed in the ON position the following controls must be in the closed position before the ice machine will start:

A. Bin Thermostat B. Ice Chute Safety Switch C. Low Water Level Switch

Placing the toggle switch in the ON position starts the gear motor. After the rotation speed sensor verifies 10 minutes of correct rotation the time delay ends and the liquid line and suction solenoid valves energize.

The ice machine will continue to make ice until ice contacts the bin thermostat and the liquid line and suction solenoid valves close.

The ice machine remains off until ice no longer contacts the bin thermostat.

28 Part Number 000007661 6/13

RN0400 Self-Contained Air-Cooled & Water-Cooled

NOTE: Ice machines use an auger to remove ice from the evaporator. Occasional noises (creaks, groans, squeaks, or pops) are a normal part of the ice making process.

Operation

The ice machine will not start until:

A. The compressor rocker switch is moved to

“ON”. B. Ice does not contact the bin thermostat bulb. C. The water reservoir is full of water.

With power supplied and the compressor rocker switch in the ON position, the gear motor and refrigeration system start. The float valve controls the water inlet valve and water level. The freeze cycle ends when ice contacts the bin thermostat. A 20

minute delay period initiates. The ice machine will restart when ice no longer contacts the bin thermostat and the 20 minute delay period expires.

Part Number 000007661 6/13 29

Step 1 Initial Startup

GRD

COMPRESSOR

FA N

DRIVE

20M

60M

2ND

WTR

B-T

B-E

RESET

GRD

FA N

BLACK

WHITE

ACK

BLACK

ORANGE

COMPRESSOR

RED

BLACK

ITE

INPUT

POWER

WATER

SENSOR

CONTRO L

BOARD

GEARMOTOR

24V

RED

BIN T

-ST

HIT E

RED

WHITE

MPRESSOR

ITCH

PWR

ACK

O.L.

BLACK

RED

HIGH PRESSURE

SAFETY SWITCH

RU N

START

O.L .

YEL

BLACK

WHITE

BLA

With power supplied to the control board the PWR (power) light is energized. The bin thermostat closes (BE light on) and the water level probe checks for water.

30 Part Number 000007661 6/13

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