Manitowoc RF0244A User manual

Technician’s
Handbook
This manual is updated as new information and models
are released. Visit our website for the latest manual.
www.manitowocice.com
America’s #1 Selling Ice Machine
Manitowoc
R Model
Flake & Nugget
Part Number 000007661 6/13

Safety Notices
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:
!Warning
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.
!Caution
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
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:
NOTE: Text set off as a Note provides you with simple,
but useful, extra information about the procedure you
are performing.
Important
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.

Read These Before Proceeding:
!Caution
Proper installation, care and maintenance are
essential for maximum performance and trouble-
free operation of your equipment. Visit our
website www.manitowocfsg.com for manual
updates, translations, or contact information for
service agents in your area.
Important
Routine adjustments and maintenance
procedures outlined in this handbook are not
covered by the warranty.
!Warning
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.
!Warning
Do not use electrical appliances or accessories
other than those supplied by Manitowoc for your ice
machine model.
!Warning
Two or more people or a lifting device are
required to lift this appliance.

!Warning
This equipment contains high voltage electricity
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.
!Warning
Do not damage the refrigeration circuit when
installing, maintaining or servicing the unit.
!Warning
Do not operate equipment that has been 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.
!Warning
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.
!Warning
Do not clean with water jet.
!Warning
It is the responsibility of the equipment owner to
perform a Personal Protective Equipment Hazard
Assessment to ensure adequate protection
during maintenance procedures.
!Warning
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.

Part Number 000007661 6/13 9
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

10 Part Number 000007661 6/13
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

Part Number 000007661 6/13 11
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

12 Part Number 000007661 6/13
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

Part Number 000007661 6/13 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

14 Part Number 000007661 6/13
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

Part Number 000007661 6/13 15
General Information
Model Numbers
SELF CONTAINED 
AIR & WATER-COOLED MODELS
Flake Models
Self Storage
Air-Cooled Self Storage Water-Cooled Modular
Air-Cooled
Modular
Water-
Cooled
RF0244A – – –
RF0266A – – –
RF0385A – – –
RF0388A – – –
RF0399A – – –
– – RF0300A –
– – RFS0300A –
RF0644A – –
– – RF0650A RF0650W
– – RFS0650A RFS0650W
– – RF1200A RF1200W
– – RFS1200A RFS1200W
– – RF2300A RF2300W
Nugget Models
Self Storage
Air-Cooled Self Storage Water-Cooled Modular
Air-Cooled
Modular
Water-
Cooled
RNS0244A – – –
-- –RNS0308A –
RNS0385A – – –
RN0408A – – –
– – RNS1008A –
– – RN1008A RN1009W
– – RN1408A RN1409W

16 Part Number 000007661 6/13
QUIETQUBE MODELS WITH REMOTE
CONDENSING UNITS
RACK UNITS
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.
Flake Models
QuietQube Head RCU Remote
Condensing Unit
RF1278C RCU1075
RFS1278C RCU1075
RF2378C RCU2375
RFS2378C RCU2375
Nugget Models
QuietQube Head RCU Remote
Condensing Unit
RN1078C RCU1075
RN1278C RCU1275
Flake Models
Head Section Rack Remote
Condensing Unit
RF1279R Supplied by Others
RFS1279R Supplied by Others
RF2379R Supplied by Others
RFS2379R Supplied by Others

Part Number 000007661 6/13 17
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.
Ice Machine Warranty Information
Warranty information for all ice machine models is
available on our website at www.manitowocice.com.
Cleaner Part Number Sanitizer Part Number
16 oz. 000000084 16 oz. 9405653
1 gal N/A 1 gal. 9405813

18 Part Number 000007661 6/13
This Page Intentionally Left Blank

Part Number 000007661 6/13 19
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.

20 Part Number 000007661 6/13
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.