Scotsman SCCP50MA-1WU, SCCG50MA-1WU, SCCP50MA-1BU, SCCG50MA-1BU, SCCP50MA-1SU Service Manual
...
Service Manual for
Residential Ice Machine
Models SCCG50 and SCCP50
SCCG50 & SCCP50
Service Manual
Introduction:
This ice machine is the result of Scotsman’s
decades of experience as an industry leader in the
design and manufacture of both commercial and
residential ice machines.
This manual includes the information needed to
install, start up and maintain the ice machine. Note
any Caution or Warning indicators, as they provide
notice of potential hazards. Keep this manual for
future reference.
Table of Contents
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2
Cabinet Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 3
Air ow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 4
Water Quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 5
Door Covering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 6
Door Panel Attachment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7
Custom Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 8
Door swing change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 9
Installation: Water & Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 10
Gravity Drain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 11
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 12
Cube Size Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 13
Harvest Time Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 14
Control Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 15
Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 16
How to clean the condenser and winterize . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 17
How to remove scale from the ice making system . . . . . . . . . . . . . . . . . . . . . . . . Page 18
System Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 19
Water System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 20
Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 21
Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 22
Performance Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 23
Refrigeration System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 24
Thermistor Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 25
Service Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 26
Service Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 27
Removal and Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 28
Removal and Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 29
Removal and Repair - Cabinet Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 30
Refrigeration Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 32
June 2008
Page 1
Specications
SCCG50 & SCCP50
Service Manual
This ice machine is designed to be used indoors,
in a controlled environment. It can be used in a
wide variety of environmental conditions, but there
are limits. Use outside of the listed limitations is
misuse and will void the warranty.
Air temperature limits:
The ice machine will operate adequately within the
limits, but functions best in temperatures between
70 and 80 degrees F.
• Minimum – 50 degrees F. (10°C)
• Maximum – 100 degrees F. (38°C)
Water temperature limits:
• Minimum – 40 degrees F. (4.5°C)
• Maximum – 100 degrees F. (38°C)
Water pressure limits:
• Minimum – 20 psi (1.4 bar)
• Maximum – 80 psi (5.5 bar)
Options:
Door Panel kits: Finished door panels are available
from Scotsman for attachment to the machine,
or a custom panel can be made.
Kit Number Panel Finish Handle Finish
KDFW White White
KDFWS White Stainless Steel
KDFB Black Black
KDFBS Black Stainless Steel
KDFS Stainless Steel Stainless Steel
Kickplate Extension: In some situations the leg
levelers will be extended enough to become visible.
A kit to extend the kickplate over the legs is KKPF.
Cabinet Stability: In some free standing
installations it may be prudent to add a bracket that
secures the back of the cabinet to a wall. That kit
number is KATB.
Drain Conversion:
Because the ice machine is making a food product,
the water supply to the ice machine must be
potable, or t for human consumption.
Electrical
• 115 volt, 60 Hz. Plug into dedicated 15 amp
circuit.
• Power consumption: 275 - 400 Watts. Varies
during Freeze and Harvest cycles.
Voltage limits:
• Minimum - 104 volts
• Maximum – 126 volts
Models: All are air cooled (A series began 8/09):
• SCCP50MA-1WU – Pump model, white cabinet - discontinued 2013
• SCCG50MA-1WU – Gravity drain model, white cabinet - discontinued 2013
• SCCP50MA-1BU – Pump model, black cabinet - discontinued 2013
• SCCG50MA-1BU – Gravity drain model, black cabinet - discontinued 2013
• SCCP50MA-1SU – Pump model, stainless cabinet, unnished door
• SCCG50MA-1SU – Gravity drain model, stainless cabinet, unnished door
• SCCP50MA-1SS – Pump model, stainless cabinet and door
• SCCG50MA-1SS – Gravity drain model, stainless cabinet and door
A gravity drain model can be converted to a drain
pump model by installing a drain pump kit. The
drain pump kit consists of a drain pump, wiring
harness and associated tubing. The kit number is
A39462-021.
Warranty Information
Warranty information is supplied separately from
this manual. Refer to it for coverage. In general,
the warranty covers defects in materials or
workmanship and does not cover corrections of
installation errors or maintenance.
November 2014
Page 2
SCCG50 & SCCP50
7 3/8"
UDED)
20 3/8"
FLOOR DRAIN
Service Manual
Cabinet Layout
3 7/8"
14 7/8"
ACCESS HOLE
29 1/4"
.75
SHEET METAL DOOR FRONT
.63 MIN. CABINET DOOR
22"
33 3/8" MIN.
34 3/8" MAX.
DRAIN
FLEXIBLE TUBING
3/8 I.D. PUMP MODEL (INCLUDED)
5/8 I.D. GRAVITY MODEL (NOT INCL
AIR OUT
AIR IN
4"
2 3/4"
1"
June 2008
Page 3
LEG ADJUSTMENT
(4) PLACES
115 V
POWER CORD
3 3/4"
1/4" COMPRESSION FITTING
2 1/2"
1 1/2"
POTABLE WATER INLET
3 1/4"
Air ow
The machine takes in room temperature air at the
lower right front and forces warm air out the lower
left front. Restricting the airow will adversely affect
the ability of the ice machine to make ice.
SCCG50 & SCCP50
Service Manual
Control Panel
Warm Air Out
Air Intake
Scotsman Ice Systems are designed and
manufactured with the highest regard for safety
and performance. They meet or exceed the
standards of agencies like U.L.
Scotsman assumes no liability or responsibility of
any kind for products manufactured by Scotsman
that have been altered in any way, including the
use of any parts and/or other components not
specically approved by Scotsman.
Ice Making
Area
Scotsman reserves the right to make design
changes and/or improvements at any time.
Specications and designs are subject to change
without notice.
June 2008
Page 4
SCCG50 & SCCP50
Service Manual
Water Quality
All water, including potable water supplied by
municipalities, contains some impurities or
minerals. Water absorbs impurities from the air as
rain and/or as it ows through the ground. Some of
the impurities are solid particles, these are known
as suspended solids, and a ne particle lter will
remove them. Other impurities are chemically
bonded to the water molecules, and cannot be
ltered out, these are called dissolved solids.
Ice made by this machine will have a lower
mineral content than the water it was made from.
This is due to the method of making ice. Purer
water will freeze rst in the ice making molds.
The reason for this is that anything dissolved in
water lowers the water’s freezing temperature.
This concentrates most of the impurities in the
ice machine water reservoir where they may
form hard deposits known as scale. The machine
dilutes the concentration of minerals by over-lling
the reservoir during the harvest cycle (with the
excess water owing down the drain). s. Between
2 and 4 pints of water ow into the unit each cycle.
Between 1 and 3.5 pints of that rinses the reservoir
and goes down the drain.
Some impurities will inevitably remain, and will
stick to the parts in the machine, and will cause
malformed ice cubes. Eventually, built up mineral
scale can shorten machine life.
To keep the machine operating properly, these
impurities or minerals will have to be regularly
dissolved by an acid cleaning, using Scotsman Ice
Machine Scale Remover. Directions for this may be
found in the section under cleaning.
Filters and Treatment
In general, it is always a good idea to lter the
water. A water lter, if it is of the proper type, can
remove taste and odors as well as particles. Some
methods of water treatment for dissolved solids
include reverse osmosis, and polyphosphate
feeders.
RO Water
This machine can be supplied with Reverse
Osmosis water, but the water conductivity must
be no less than 10 microSiemens/cm. A reverse
osmosis system should include post treatment to
satisfy the R.O. water’s potential aggressiveness.
Deionized water is not recommended.
Because water softeners exchange one mineral
for another, softened water may not improve water
conditions when used with ice machines. Where
water is very hard, softened water could result in
white, mushy cubes that stick together.
If in doubt about the water, contact a local point of
use water specialist for recommendations on water
treatment.
Installation Overview
The ice machine must:
• be connected to cold, potable water
• be connected to a drain
• be connected to the proper power supply
• be able circulate air through the vents at the
front.
Note: Do not build in so that the door is recessed.
June 2008
Page 5
Door Covering
SCCG50 & SCCP50
Service Manual
Door Panel
The ice machine is supplied without a conventional
door covering so it can be decorated to the user’s
preference. Scotsman offers several coverings
including white, black and stainless steel. In
addition, a custom built panel can be placed onto
the door.
Door Panel Attachment
To attach a Scotsman supplied panel:
Note: If door swing is to be changed, it must be
done before panel is attached.
The panel will be held on by 6 sheet metal screws
and 2 machine screws.
1. Remove the gasket and retain for later use.
2. If the door panel is stainless steel, remove any
plastic covering the stainless steel panel.
Custom Panel
A custom panel of wood or other material not
exceeding 15 lb can be attached to the door.
Attachment is from the ice side of the door. Holes
are provided in the door for this purpose.
See instructions in information packet to create and
attach a custom panel:
3. Place the panel onto the outside of the door,
and secure it to the door using two machine
screws, located at the left center and right center.
4. Fasten the panel to the door using the 6 sheet
metal screws. In the hinge area, use the outermost
screw holes.
5. Place the covers over the hinge areas, and
secure each cover to the door using a sheet metal
screw.
6. Insert hole plug over screw installed in step 5.
7. Return the gasket to its original position.
June 2008
Page 6
SCCG50 & SCCP50
Service Manual
Door Panel Attachment
Use Upper
Hole at the
Top
Gasket
Scotsman
Door Panel
Machine
Screw
Hole Plug
Use Lower
Hole at the
Bottom
Cover
June 2008
Page 7
Custom Panel
64/31 13"
"
"
SCCG50 & SCCP50
Service Manual
A custom panel of wood or other material not
exceeding 15 lb can be attached to the door.
Attachment is from the ice side of the door. Holes
are provided in the door for this purpose.
To create and attach a custom panel:
• Panel width: 14 7/8”
• Panel height: Between 29 3/8” and 30 3/8”.
• Panel thickness: 5/8” to ¾”
1. Measure overall height of cabinet
opening where ice machine will be
(oor to bottom of countertop edge).
2. Determine desired kickplate
16/13"
space (from bottom of door to oor).
This could be equal to the adjacent
cabinet’s kickplate space or another
space the user wants.
3. Subtract kickplate space from
cabinet opening.
10. Mount panel to door using wood screws or
supplied panel mounting screws.
Note: When installed Ice machine must be
adjusted for height to position top of door to
desired clearance.
16/9 13"
32/25 6"
4/1 8"
8/1 4"
32/13"
4. Subtract 1/8 or more for clearance
space between top of door and
bottom of countertop edge from
cabinet opening. This is the
maximum door length.
5. Cut panel to width.
6. Cut panel to length (cabinet space
- kickplate space - top clearance =
length).
7. Determine top of panel.
8. Mark hole locations using drawing
on the back of these instructions.
Drawing assumes top of panel will be
ush with top of door. Measure hole
locations from the top of the panel.
9. Drill pilot holes for wood screws.
Use drill stop to prevent drilling
through the panel.
16/11 14"
Ø8/1"
TYP. (10)
8/3 30
8/3 29
32/13"
June 2008
Page 8
{Centerline}
8/7 14"
SCCG50 & SCCP50
Service Manual
Door swing change
Note: Prior models had separate hinge brackets
and different directions to change swing.
Moving the hinges allows the door to open from
either the left or right side. Change swing before
attaching door panel.
To change:
1. Remove innermost screw holding each hinge to
cabinet, loosen the other.
Remove
Loosen
4. Remove hole plugs or screws from unit’s new
hinge locations, set aside.
5. Move screws loosened in step 1 to opposite
location.
6. Install screws or plugs removed in step 4 to the
unit’s original hinge location to ll the holes.
7. Remove the upper hinge from the door
and move it to the door’s opposite side, bottom
location. Secure using the original screws.
Note: If door panel is attached, it must be removed
to access hinge screws and to reverse handle
position.
8. Remove the original lower hinge and move it
to the door’s opposite side, upper location. Secure
using the original screws.
9. Install pocket covers and hole plugs onto door.
10. Attach the door to the cabinet using the original
screws.
2. Slide door to the side and remove from cabinet.
Plug
3. Remove plug and hinge pocket covers from
door.
Note: There are either plugs or screws in the holes
where the hinges will mount. They must be moved.
Pocket
Cover
Installation Notes
Built In Situations: If a nished oor is to be
installed in the area after the ice machine has
been built in, shims the expected thickness of the
oor should be installed under the unit to keep the
machine level with the planned oor level.
Installations on a slab: Use a pump model and
pump the water to the point of drainage. Pump
models will pump 1 story (10 feet) high.
Installations over a crawl space or basement:
Either gravity drain or pump model units may
be used, if there is not enough room behind the
machine for a drain/waste receptacle, the drain will
have to be below the oor.
Note: When installed in a corner, the door swing
may be limited due to handle contact with the wall
or cabinet face.
January 2012
Page 9
Installation: Water & Drain
SCCG50 & SCCP50
Service Manual
Water Supply, all models: The recommended water
supply tubing is ¼ inch OD copper. Stainless steel
ex or reinforced PVC tube may also be used.
Install an easily accessible shut-off valve between
the supply and the unit. This shut-off valve should
not be installed behind the unit.
Note: Do not use self-piercing type valves.
1. Remove the front service panel.
Screw
Securing
Front Service
Panel
Water Inlet
Connection,
located at the
FRONT of the
machine. Do
NOT connect
to tubing at
the back.
Drains
There are two types of ice machine models, one
that drains by gravity and one that has an internal
drain pump.
Drain Pump Model drain installation
1. Locate the coil of 3/8” ID plastic drain tubing
secured to the back of the unit.
2. Route the plastic drain tube from the back of
the unit to the drain connection point.
2. Route the tubing through the right hole in the
back to the inlet water solenoid valve inlet.
3. Install a compression tting on the tubing and
connect to the inlet of the solenoid.
Drain Tube,
Route to
building drain
IMPORTANT NOTE: Often an air gap is required
by local codes between the ice maker drain tube
and the drain receptacle.
Water Inlet
Tube (eld
supplied)
Back View, Drain Pump Model
September 2011
Page 10
SCCG50 & SCCP50
Service Manual
Gravity Drain
Caution: Restrictions in the drain system to the
machine will cause water to back up into the ice
storage bin and melt the ice. Gravity drain tubing
must be vented, have no kinks and slope to the
building drain. Air gaps are typically required by
local code.
1. Place the ice machine in front of the installation
opening. Adjust leveling legs to the approximate
height.
2. Remove the front service access panel and the
upper back panel.
Note: If you are connecting a gravity drain model
and the drain opening has been located in the oor
under the base pan according to the pre install
specications, follow steps 3 through 5 to drain the
unit through the base. If not, proceed to step 6b.
3. Remove the clamp and barbed elbow and take
off the plastic cover in the base pan below the
drain hose.
4. Connect a straight 5/8” barbed connector to
the drain hose, securing with the clamp removed in
step 4.
5. Cut an 8” piece of 5/8” ID X 7/8” OD tygon
(clear plastic) tubing. Slide one end of the tube
onto the outlet of the barbed connector and secure
with a clamp. Leave the other end of the tube
lying on the oor of the base pan until the unit is
positioned over the oor drain.
6. Route the drain tube. Either a) Insert the drain
tube through the base pan into the oor drain or
b) Route the drain tube through the left hole in the
lower back panel and connect to barbed elbow and
secure with a clamp.
7. Reinstall the upper back panel.
8. Reinstall the service access panel. Level the
unit.
Drain Hose
Drain Hose,
Route to
building drain
Barbed Elbow
Water Inlet
Tube (eld
supplied)
Back View, Gravity Drain Model
June 2008
Page 11
Electrical
SCCG50 & SCCP50
Service Manual
The ice machine is supplied with a power cord.
Do not remove the grounding pin from the cord’s
plug. Do not use extension cords. Follow all codes.
Connect the machine to its own 115 volt, 15 amp
circuit.
1. If the electrical outlet for the ice maker is
behind the unit, plug in the unit.
2. Position the unit in the installation opening.
3. Turn on the water supply. Make sure that the
ice maker is plugged in and the power is on.
4. Slide unit into installation opening, paying
careful attention to water supply and drain
connections. Do not kink!
5. Pour a couple of quarts of water into the ice
storage bin; on drain pump equipped machines the
drain pump should start and water should pump
out. Check for leaks.
6. Replace the service access panel.
Installation check list:
1. Has the unit been connected to the proper
water supply?
2. Has the water supply be checked for leaks?
3. Has the unit been connected to a drain?
4. Has the drain been tested for ow and leaks?
5. Has the unit been connected to the proper
electrical supply?
6. Has the unit been leveled?
7. Have all packing materials been removed from
the machine?
8. Has the door covering been installed?
Initial Start Up
1. Turn on the water supply.
7. Level the unit as needed.
2. Switch on the electrical power.
3. Push and release the On/Off switch to start the
machine. The Ice Making light next to the On/Off
switch will glow Green.
4. Water will begin to ow into the unit. When
the reservoir is full, water will start to drain from
the machine. After a few minutes the compressor,
water pump and fan motor will begin to operate
and the rst ice making cycle will have begun.
No adjustments are needed.
After about a half hour, ice will fall into the ice
storage bin. The machine makes 24 cubes per
batch. It is normal for the rst batches of ice to
melt, that continues until the bin has cooled. It will
take 8 to 10 hours of continuous run time to ll the
ice bin. When the bin is full of ice, the ice machine
will shut off. It will automatically restart when the
ice level falls, either from use or normal meltage.
June 2008
Page 12
SCCG50 & SCCP50
Service Manual
Cube Size Adjustment
The cube size can be adjusted by changing the
amount of freeze cycle time. This is done by a
button press sequence.
Note: There is only one correct cube size. See the
illustrations.
To adjust cube size:
1. Shut the machine off: If it’s off on bin full press
and release the On/Off button once, switching the
Ice Making light off. If the machine is making ice
hold the On/Off button in until the Ice Making light
is off.
2. Press and hold the Clean button for 5 seconds
(light on), then release (light out)
3. View the lights. Compare to the table below.
Cube Size Change Table
Side Views of Cubes
Too Small, Adjust Cycle Longer
Just Right
On/Off Water Clean
Default off off off
Add 1 minute on off off
Add 2 minutes off on off
Add 3 minutes off off on
Add 4 minutes on on on
- 1 minute ash off off
- 2 minutes off ash off
- 3 minutes off off ash
- 4 minutes ash ash ash
4. Select the amount of change.
5. Push and release the On/Off button until the
correct light pattern is displayed.
6. Push and release the Clean button to select
that setting.
Too Large, Adjust Cycle Shorter
7. Push and release On/Off to return to ice making.
June 2008
Page 13
Harvest Time Adjustment
The harvest time can be adjusted so that all the
ice harvests during the cycle, plus a few seconds
extra. This is done by a button press sequence.
Note: Do not set harvest time shorter than the
actual time it takes to release all the cubes.
To adjust Harvest Time:
1. Shut the machine off by holding the On/Off
button in until it shuts off (Ice Making light off).
2. Press and hold the On button again for 5
seconds, then release (Ice Making light will switch
off).
3. View the lights. Compare to the table below.
SCCG50 & SCCP50
Service Manual
Harvest Time Table
On/Off Water Clean
Default off off off
Add 10 seconds on off off
Add 20 seconds off on off
Add 30 seconds off off on
Add 40 seconds on on on
- 10 seconds ash off off
- 20 seconds off ash off
- 30 seconds off off ash
- 40 seconds ash ash ash
4. Select the amount of change.
5. Push and release the Clean button until the
correct light pattern is displayed.
6. Push and release the On button to select that
setting.
7. Push and release On/Off to return to ice making.
June 2008
Page 14
SCCG50 & SCCP50
Service Manual
Control Settings
Automatic water purge enable / disable
The control is set at the factory to automatically
select the proper amount of water purge. If desired,
that can be disabled, and a typical purge amount
used.
To disable Automatic purge selection:
1. Press and hold the On/Off button until the unit
shuts off. No lights should be on.
2. Press and hold the ON button for 5 seconds,
then release.
3. Wait between 5 and 20 seconds, then repeat
step 1. All lights will ash once.
To return to Automatic purge selection:
1. Press and hold the ON button for 5 seconds,
then release.
2. Wait between 5 and 20 seconds, then repeat
step 1. All lights will ash twice.
Manual Harvest - from the OFF or Standby Mode
(powered but no lights are on)
1. Press and hold the Clean-Reset button for
5 seconds and release.
2. Wait between 5 and 20 seconds, then repeat
step 1. All lights will ash once. The On/Off light will
be on until harvest has timed out.
Reset time to clean indicator light
Press and hold the Clean-Reset button for
3 seconds.
June 2008
Page 15
Use
No special instructions are needed for use. Just
take as much ice as you need, the machine will
replace it. A scoop is provided, and it can be stored
in the machine using the loop of tubing on the right
side as a holder.
The machine can be shut off anytime by just
pushing and releasing the On/Off button. The
machine will shut off at the end of the next cycle.
To shut off immediately, push and hold the On/Off
button in until the machine stops.
SCCG50 & SCCP50
Service Manual
What shouldn’t be done?
Never keep anything in the ice storage bin that is
not ice. Objects like wine or beer bottles are not
only unsanitary, but the labels can slip off and plug
up the drain.
Never allow the machine to operate without regular
cleaning. The machine will last longer if it is kept
clean. Regular cleaning should happen at least
once per year, and preferably twice. Some water
conditions will dictate even more frequent cleaning
of the ice making section, and some carpets or
pets will dictate more frequent cleaning of the
condenser.
Note: The Time to Clean light will switch ON after
6 months of use. It will remain ON until the ice
making system is cleaned using the process on
page 18.
Noise:
Normal cubes are tapered cylinders. If the cubes
are ragged and mis-shaped, mineral scale must be
removed from the ice making system
Maintenance
There are 5 things to keep clean:
1. The outside cabinet & door.
2. The ice storage bin.
3. The condenser.
4. The ice making system.
5. The ice scoop.
How to clean the cabinet.
Wipe off any spills on the surface of the door and
handle as they occur. If anything spilled on the
door or gasket dries onto the surface, wash with
soap and warm water to remove.
The ice machine is designed for quiet operation,
but will make some noise during the ice making
cycle. During a freezing cycle, it is normal to hear
the fan moving air and the water pump circulating
water. Ice hitting the bin or ice in the bin can be
heard during harvest.
If ice making noise is objectionable, an appliance
grade timer can be added to the power supply. Set
the timer to turn the machine off at the time(s) of
day when the noise is most objectionable.
June 2008
Page 16
How to clean the ice storage bin.
The ice storage bin should be sanitized
occasionally. It is usually convenient to sanitize the
bin after the ice making system has been cleaned,
and the storage bin is empty.
A sanitizing solution can be made of 1 ounce of
household bleach and two gallons of hot (95°F. –
115°F.) water. Use a clean cloth and wipe the
interior of the ice storage bin with the sanitizing
solution, pour some of the solution down the drain.
Allow to air dry.
SCCG50 & SCCP50
Service Manual
How to clean the condenser and winterize
Condenser cleaning
The condenser is like the radiator on a car, it has
ns and tubes that can become clogged with dirt
and lint. To clean:
1. Remove the kickplate and front service panel.
2. Locate the condenser surface.
Winterizing
1. Clean the ice making system.
2. Open the door and push and release the
On/Off switch to turn the machine off.
3. Turn off the water supply.
4. Drain the water reservoir by removing the
rubber cap under the reservoir or black drain pulg
it’s near the back wall of the ice storage bin.
5. Disconnect the incoming water line at the inlet
water valve.
6. Open the door, push and release the on/off
switch to turn the machine on.
7. Blow air through the inlet water valve; a tire
pump could do the job.
8. Drain pump models should have about
1/2 gallon of RV antifreeze (propylene glycol)
poured into the ice storage bin drain.
3. Vacuum the surface, removing all dust and lint.
Caution: Do not dent the ns.
4. Return the kickplate and front service panel to
their original positions. Fasten them to the cabinet
using the original screws.
Note: Automotive antifreeze must NOT be used.
9. Switch off and unplug the machine.
June 2018
Page 17
How to remove scale from the ice making system
SCCG50 & SCCP50
Service Manual
1. Scoop out all of the ice, either discard it or save
it in an ice chest or cooler.
2. Press and HOLD the On/off button in for
3 seconds until the Green light goes out.
3. Press and HOLD the both the Clean-Reset and
On/Off buttons for 5 seconds. The Time to Clean
light will blink on and off.
4. Pour 8 ounces of Scotsman Ice Machine
Scale Remover (available from a local Scotsman
Distributor or Dealer) into the ice machine
reservoir.
9. Pour a gallon of hot (95°F. – 115°F.) water into
the bin to ush out the drain.
10. Clean the bin liner of mineral scale by mixing
some ice machine scale remover and hot water,
and using that solution to scrub the scale off of the
liner.
11. Rinse the liner with hot water.
12. Sanitize the bin interior.
13. Replace the ice removed in step 1.
14. Push and release the On/Off button to restart
ice making.
The ice scoop should be washed regularly, wash it
just like any other food container.
5. Operate the machine for about ½ hour.
6. Push and release the On/Off switch. The
machine will begin to ush out the cleaning
solution.
7. Operate the machine for another ½ hour.
8. Push and release the On/Off switch. The
machine will stop the cleaning process.
Pour Scale
Remover Here
June 2008
Page 18
SCCG50 & SCCP50
Service Manual
System Information A Model
Overall:
• Refrigerant: 8 oz R-134a
• Compressor: Hermetic, 1300 BTUH
• Condenser: Forced draft
• Fan blade: 5 blade, 7 inch
• Evaporator: Inverted, 24 cube cells. Copper cups
attached to continuous serpentine
• Metering device: Cap tube
• Defrost method: Hot gas bypass with water
assist
• Spray method: 6 water jets
• Water charge: 40 ounces
• Water valve: 115 volt solenoid, .19 GPM
• Water ll time: Varies with harvest time & purge
setting
• Spray pump: Pedestal type.
• Drain pump: Magnetic drive, controlled by
pressure switch
• Purge method: Overow standpipe
• Control method: Electronic
• Cycle control: Thermistor + timers
• Freeze cycle timer A model:10 minutes, + - 4
• Freeze cycle timer B model :11 minutes, + - 4
• Harvest cycle timer: 20 seconds, + - 40
• Cube size adjustment: Freeze timer change.
• Harvest cycle adjustment: Harvest timer change
• Bin control: Thermostat. Opens on temperature
fall, Cut Out: 35 degrees F. Cut In 45 degrees F.
Range is adjustable.
Electrical Components:
• Compressor
• Fan motor
• Spray pump motor
• Drain pump motor
• Drain pump switch
• Bin light - LED type
• Bin light switch - magnetic reed
• Inlet water solenoid valve
• Hot gas valve
• Transformer
• Controller
• Water sensor
• Thermistor
• Bin thermostat
Electrical Sequence:
A closed bin thermostat signals to the controller
a need for ice. The controller checks for water,
if water is needed , the controller opens the inlet
water solenoid valve to ll the reservoir. The hot
gas valve is open to equalize the system. When
the reservoir is full, the compressor, fan motor,
water pump are switched on. After 5 seconds the
hot gas valve shuts and ice making begins.
Water is sprayed up into the inverted cup mold.
As the water is cooled and ice begins to form in the
cups, the temperature of the evaporator will fall.
The freeze cycle continues until the temperature
of the thermistor attached to the evaporator outlet
tube falls to about 0°F A model and 3°F B model. At
that point the controller starts a freeze cycle timer,
whose default time is 10 minutes for A model and
11 minutes for B model. At the end of the freeze
cycle’s timed portion the controller switches to the
harvest cycle.
The harvest cycle begins with the controller
stopping the water pump and fan motor. At the
same time it opens the hot gas valve and the
inlet water solenoid valve. The ice is released
by the combination of discharge refrigerant gas
entering the evaporator serpentine and warming
up the copper, plus the inlet water that ows to
the evaporator, oods across the plastic platen to
warm it up and be pre-chilled for the next cycle.
Ice cubes drop individually and harvest continues
until the thermistor attached to the suction line
warms up to about 50°F. At that point
a harvest timer starts, whose default time is
20 seconds. At the end of that time the harvest
cycle ends and the freeze cycle restarts.
Bin control.
The machine’s on and off modes are regulated by a
bin thermostat. The cap tube for the bin thermostat
is in the tube that holds the scoop. The machine
will only begin ice making when the thermostat’s
contacts close. If the contacts re-open before the
temperature of the evaporator drops below a preset
point, the machine will stop. If the temperature
is below that point when the contact s open, the
machine will continue through a complete cycle
and stop at the end of the harvest cycle.
December 2019
Page 19
Water System
The controller uses a Water Sensor to check
for the presence of water in the reservoir and to
measure the conductivity of the water.
The water sensor consists of two stainless steel
probes located in a holder next to the water pump.
The probes sense the conductivity of the water.
The higher the mineral content of the water,
the better it can conduct electricity. The control
system is capable of sensing water as clean as
10 microSiemens/cm.
If the controller cannot sense water and the bin
thermostat is closed the controller will power the
inlet water solenoid valve to ll the reservoir. The
water ll is timed. There is a maximum amount of
time allowed from the time the controller turned on
the inlet water valve until the water sensor signals
to the controller. That time is 2 1/2 minutes. If water
is not sensed within 2 1/2 minutes, the controller
will not proceed with an ice making cycle. Instead it
will blink the Water light and try lling the reservoir
in 20 minutes.
SCCG50 & SCCP50
Service Manual
Evaporator
Pump
Reservoir
Drain
Freeze Cycle Water Schematic
Reservoir water dilution
The process of making ice from circulating water
causes the pure water to freeze rst, because it
freezes at the warmest temperature. The remaining
water will develop an increasing concentration
of minerals. If that mineral concentration were
allowed to continue, eventually the ice machine
would become coated with mineral scale.
To combat the mineral build up, the reservoir
water is diluted with fresh water every cycle. The
controller adds enough water to ll the reservoir
and extra water to overll it. The extra water drains
out through the standpipe in the reservoir.
The controller keeps the inlet water solenoid valve
open until the evaporator temperature set point is
reached, plus some extra time. The extra time is
either pre-set or automatically determined by the
controller.
Standpipe
Inlet Water Solenoid Valve
Harvest Cycle Water Schematic
November 2008
Page 20
SCCG50 & SCCP50
Service Manual
Components
Model and
Serial Tag
Location
Scoop and Thermostat Bracket
Evaporator Platen
Control Panel, Bin Light and Curtain
Evaporator and Controller
Inlet Water Solenoid Valve
Condenser and Bin Thermostat
June 2008
Page 21
Controller
SCCG50 & SCCP50
Service Manual
High
Voltage
Connector
Evaporator
Thermistor
Bin
Thermostat
Comp
Water Sensor
Water
Hot Gas
Fan
Power
Power Supply
Connector
The controller is located at the front of the unit,
under the top panel.
It is powered by a 12 volt transformer. It has
5 indicator lights:
• Compressor - Light is ON if compressor is
powered
• Water - Light is ON if inlet water solenoid
valve is powered
• Hot Gas - Light is ON when Hot Gas Valve
is powered
• Fan - Light is ON when Fan motor is
powered
• Power - Light is ON when power is
connected to controller
Control Panel
Ribbon
Control Safeties:
No Water. If the Water Sensor cannot detect
water, and the inlet water solenoid valve has been
on for the maximum ll time, the controller will
stop all action and wait 20 minutes to re-try water
ll. During this time the Check Water light on the
control panel will be blinking,
Maximum Freeze Time. If the freeze cycle
should extend to 60 minutes, the controller will
automatically put the machine into a Harvest cycle.
Maximum Harvest Time. 6 minutes
Time between restarts. After the machine has
operated and then turned off, the controller will not
restart the machine for four minutes.
June 2008
Page 22
SCCG50 & SCCP50
Service Manual
Performance Information for A and B Models
Freeze Cycle, Minutes
100 90 80 70 60 50
100 37-38 36-37 34-35 32-33 31-32 29-30
90 36-37 35-36 33-34 31-32 30-31 28-29
80 36-35 32-33 30-31 28-29 27-28 26-27
Water
Temperature
Harvest Cycle, Seconds
70 32-33 28-29 27-28 25-26 23-24 22-23
60 27-28 25-26 24-25 22-23 20-21 19-20
50 20-21 19-20 18-19 17-18 16-17 15-16
40 18-19 17-18 16-17 15-16 15-16 15-16
100 90 80 70 60 50
Air Temperature
Air Temperature
80 - 100 55-60 60-70 70-80 80-90 90-100 110-115
Water
Temperature
Total Cycle, Minutes
Water
Temperature
70 - 80 65-75 70-80 75-85 85-95 95-105 115-120
50 - 70 70-80 75-85 85-95 125-135 140-150 160-170
40 - 50 100-120 115-125 130-140 150-170 180-200 210-230
100 38-39 37-38 36-37 34-35 33-34 31-32
90 38-39 36-37 35-36 33-34 32-33 30-31
80 37-38 33-34 31-32 30-31 29-30 27-28
70 33-34 29-31 28-29 26-27 25-26 24-25
60 29-30 27-28 25-26 24-25 22-23 21-22
50 21-22 20-21 19-20 19-20 19 18-19
40 20-21 19-20 19 18-19 19 19-21
Air Temperature
100 90 80 70 60 50
Ice per cycle: 1 lb
Water drained / cycle: Varies by harvest cycle
length and purge setting. Typical amounts are @
70/50 = 52 oz. @ 90/70 = 13 oz
Compressor amps: 2.6 - 3.2
June 2008
Page 23
Refrigeration System
70
60
50
40
30
PSIG
20
10
0
SCCG50 & SCCP50
Service Manual
SuctionPressure
-10
Time
DischargePressure
15 0
14 0
13 0
12 0
110
10 0
PSIG
90
80
70
60
50
Time
June 2008
Page 24
SCCG50 & SCCP50
Service Manual
Thermistor Values
Deg. F · Ohms Deg. F · Ohms Deg. F · Ohms Deg. F · Ohms Deg. F · Ohms
• • • •
0
• • • •
1
• • • •
2
• • • •
3
• • • •
4
• • • •
5
• • • •
6
• • • •
7
• • • •
8
• • • •
9
• • •
10
• • •
11
• • •
12
• • •
13
• • •
14
• • •
15
• • •
16
• • •
17
• • •
18
• • •
19
• • •
20
• • •
21
• • •
22
• • •
23
• • •
24
• • •
25
• • •
26
• • •
27
• • •
28
• • •
29
• • •
30
• • •
31
• • •
32
• • •
33
• • •
34
• • •
35
• • •
36
• • •
37
• • •
38
• • •
39
• • •
40
• • •
41
• • •
42
• • •
43
• • •
44
• • •
45
• • •
46
• • •
47
• • •
48
• • •
49
• • •
50
• • •
51
85325 52
82661 S3
80090 54
77607 55
75210 56
72896 57
70660 58
68501 59
66415 60
64400 61
62453 62
60571 63
58752 64
56995 65
55296 66
53653 67
52065 68
50529 69
49043 70
47607 71
46217 72
44872 73
43571 74
42313 75
41094 76
39915 77
38774 78
37669 79
36600 80
35564 81
34561 82
33590 83
32649 84
31738 85
30855 86
30000 87
29171 88
28368 89
27589 90
26835 91
26104 92
25395 93
24707 94
24041 95
23394 96
22767 97
22159 98
21569 99
20997 100
20442 101
19903 102
19381 103
• • •
18873 104
• • •
18381 105
• • •
17903 106
• • •
17439 107
• • •
16988 108
• • •
16551 109
• • •
16126 110
• • •
15714 111
• • •
15313 112
• • •
14924 113
• • •
14546 114
• • •
14179 115
• • •
13823 116
• • •
13476 117
• • •
13139 118
• • •
12812 119
• • •
12494 120
• • •
12185 121
• • •
11884 122
• • •
11592 123
• • •
11308 124
• • •
11031 125
• • •
10763 126
• • •
10502 127
• • •
10247 128
• • •
10000 129
• • •
9760 130
• • •
9526 131
• • •
9299 132
• • •
9077 133
• • •
8862 134
• • •
8652 135
• • •
8448 136
• • •
8250 137
• • •
8056 138
• • •
7868 139
• • •
7685 140
• • •
7507 141
• • •
7333 142
• • •
7164 143
• • •
6999 144
• • •
6839 145
• • •
6683 146
• • •
6530 147
• • •
6382 148
• • •
6238 149
• • •
6097 150
• • •
5960 151
• •
5826 152
• •
5696 153
• •
5569 154
• •
5446 155
• •
5325 156
• •
5208 157
• •
5093 158
• •
4981 159
• •
4872 160
• •
4766 161
• •
4663 162
• •
4562 163
• •
4463 164
• •
4367 165
• •
4273 166
• •
4182 167
• •
4093 168
• •
4006 169
• •
3921 170
• •
3838 171
• •
3757 172
• •
3678 173
• •
3601 174
• •
3526 175
• •
3452 176
• •
3381 177
• •
3311 178
• •
3243 179
• •
3176 180
• •
3111 181
• •
3047 182
• •
2985 183
• •
2924 184
• •
2865 185
• •
2807 186
• •
2751 187
• •
2696 188
• •
2642 189
• •
2589 190
• •
2537 191
• •
2487 192
• •
2438 193
• •
2390 194
• •
2343 195
• •
2297 196
• •
2252 197
• •
2208 198
• •
2165 199
• •
2123 200
• •
2082 201
• •
2042 202
• •
2003 203
• •
1965 204
• •
1927 205
• •
1890 206
• •
1855 207
• •
1819 208
• •
1785 209
• •
1752 210
• •
1719 211
• •
1687 212
• •
1655 213
• •
1624 214
• •
1594 215
• •
1565 216
• •
1536 217
• •
1508 218
• •
1480 219
• •
1453. 220
• •
1427 221
• •
1401 222
• •
1375 223
• •
1350 224
• •
1326 225
• •
1302 226
• •
1279 227
• •
1256 228
• •
1234 229
• •
1212 230
• •
1190 231
• •
1169 232
• •
1149 233
• •
1129 234
• •
1109 235
• •
1090 236
• •
1071 237
• •
1052 238
• •
1034 239
• •
1016 240
• •
998 241
• •
981 242
• •
965 243
• •
948 244
• •
932 245
• •
916 246
• •
901 247
• •
885 246
• •
871 249
• •
856 250
• •
842
• •
828
• •
814
• •
800
• •
787
• •
774
• •
761
• •
749
• •
737
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
724
713
701
690
679
668
657
646
636
626
616
606
597
587
578
569
560
551
543
534
526
518
510
502
495
487
480
472
465
458
451
444
438
431
425
419
412
406
400
394
389
383
377
June 2008
Page 25
SCCG50 & SCCP50
Service Manual
Service Diagnosis
No Ice
Problem Likely Cause Probable Solution
No power to unit Power disconnected
No power to controller Transformer open Replace transformer
Control panel open Switch failure Test ribbon cable, see page 32
Shut down on maximum
water ll time - water light
ashing
Very long freeze cycle
Water shut off Restore water supply
Water leak Check curtain, sump
Dirty condenser Clean condenser
Restricted location, intake air too hot
or blocked
Evaporator thermistor not sensing
properly
Spray jets dirty
Inlet water valve leaks through
during freeze
Low on refrigerant Check cube formation,
Check breaker or fuse. Reset or
replace, restart and check
Eliminate restriction, have machine
moved
Check thermistor
Remove spray platform and clean
spray jets
Check inlet water valve
Cannot make ice
Check for bleed thru from / missing
Connected to hot water
Spray pump not pumping Check pump motor
Fan motor not turning
Pump hose disconnected Check hose
Very low on refrigerant
Compressor not operating
Hot gas valve leaks through during
freeze
Compressor inefcient
check valve in building water
supply
Check fan motor, check fan blade,
check controller for voltage output
Add access valve, add refrigerant
as a test. If unit makes ice, nd and
correct leak.
Check compressor start
components, check PTCR
resistance and temperature
Check compressor voltage
Check compressor windings
Check hot gas valve for hot outlet
during freeze
Check compressor amp draw, if
low and all else is correct, change
compressor
January 2012
Page 26
SCCG50 & SCCP50
Service Manual
Service Diagnosis
Makes excessive noise
Problem Likely Cause Probable Solution
Fan blade vibrates
Compressor vibrates
Water pump vibrates
Panels vibrate Mounting screws loose Tighten screws
Makes ice, does not harvest
Problem Likely Cause Probable Solution
Ice wrong size Environment changed Adjust cube size
Little heat to evaporator
Makes poor quality ice
Blade is bent Replace fan blade
Fan motor mount is broken Replace motor mount
Mounting loose
Pump bearings worn
Hot gas valve does not open
Water temperature very low Adjust harvest time
Fan motor does not stop Check voltage, replace controller
Check mounting
Replace pump
Check voltage to coil when unit is
in harvest, check controller
indicator light.
Problem Likely Cause Probable Solution
Spray pattern poor Spray jets dirty Clean jets
Runs out of water Water leaking from reservoir Correct leak
High TDS water supply Groundwater supply Treat water
Makes ice, but melts rapidly
Problem Likely Cause Probable Solution
Restricted drain Gravity drain hose has air block Check for kinks or traps
Pooled water in bin
No Response from Control Panel Switches
• Test membrane switch panel, see page 32.
Pump model switch not starting
pump
Check / replace switch
January 2012
Page 27
Removal and Repair
SCCG50 & SCCP50
Service Manual
Bin Thermostat
1. Disconnect electrical power.
Electrical Shock
Hazard.
Disconnect electrical
power before
beginning removal
2. Remove service panel.
3. Remove back panel.
Note: If unit is built in it must be pulled out to
change the bin thermostat.
4. Pull cap tube out from the back of the ice
storage bin and cap tube holder.
5. Remove two screws and the bin thermostat
contact section from its mounting bracket.
9. Reverse to reassemble.
Curtain
1. Shut unit off.
2. Loosen both thumbscrews holding curtain
bracket to freezing chamber.
3. Pull out and remove curtain with bracket from
ice machine.
4. Reverse to reassemble.
Spray Platform
1. Remove curtain.
2. Lift spray platform up until it disconnects from
its tting.
3. Pull forward and remove from the ice machine.
4. Reverse to reassemble.
Water Pump
6. Disconnect two wires from the bin thermostat
contact section and remove the thermostat from
the ice machine.
7. Reverse to reinstall.
Inlet Water Solenoid Valve
1. Disconnect electrical power.
2. Remove service panel.
3. Shut water supply OFF.
4. Disconnect inlet water supply tube from inlet
water solenoid valve.
5. Unplug wire harness from valve coil.
6. Remove two screws holding valve to chassis.
7. Squeeze hose clamp larger and push away
from solenoid valve outlet.
8. Pull hose from outlet of valve.
1. Remove spray platform
2. Remove back panel.
Note: If unit is built in it must be pulled out to
change the water pump.
3. Disconnect power and ground wires from pump
motor.
4. Rotate pump body CW and lift up to remove it.
5. Reverse to reassemble.
June 2008
Page 28
SCCG50 & SCCP50
Service Manual
Removal and Repair
Evaporator Thermistor
Note: If unit is built in it must be pulled out to
change the evaporator thermistor.
Electrical Shock
Hazard.
Disconnect electrical
power before
beginning removal
1. Shut machine off. If unit was making ice,
manually harvest the ice.
2. Disconnect electrical power.
3. Remove top panel.
4. Remove cover from controller box.
5. Disconnect thermistor wire from controller.
6. Locate thermistor sensor, it is attached to
the suction line, just above the accumulator and
is covered with insulation tape. Remove the
insulation.
7. Disconnect sensor bulb from suction line
(it’s held on with a metal clip).
5. Remove screws holding transformer to
controller box and pull transformer up and out of
the ice machine.
6. Reverse to reassemble.
Controller
Note: If unit is built in it must be pulled out to
change the controller.
1. Disconnect electrical power.
2. Remove top panel
3. Remove controller box cover.
4. Unplug all connections.
5. Remove screws holding controller to housing,
and lift controller from unit.
Note: To avoid damaging the controller, touch
the metal chassis of the unit prior to touching the
replacement controller.
6. Reverse to reassemble.
Control Panel
1. Disconnect electrical power.
8. Remove thermistor from ice machine.
9. Reverse to reassemble. It is very important
that the bulb be re-insulated.
Transformer
Note: If unit is built in it must be pulled out to
change the transformer.
1. Disconnect electrical power.
2. Remove top panel.
3. Remove controller cover.
4. Unplug leads from transformer.
2. Remove top panel
3. Remove controller box cover.
4. Unplug ribbon cable connection.
5. Push control panel away from the front of the
machine. Begin at the ribbon cable attachment
point.
Note: Control panel is held on by adhesive and the
adhesive is thinnest at the cable point.
6. Separate control panel from controller box and
remove from the ice machine.
7. Reverse to reassemble.
June 2008
Page 29
Removal and Repair - Cabinet Removal
SCCG50 & SCCP50
Service Manual
Certain components require the removal of the
cabinet for repair access.
1. If the machine is in a freeze mode, perform a
manual harvest.
2. Remove all ice.
3. Drain reservoir.
4. Remove service panel and kick plate.
5. Remove back panel.
6. Disconnect electrical power.
Electrical Shock
Hazard.
Disconnect electrical
power before
beginning removal
7. Disconnect water and drain tubing.
12. Remove curtain & hanger.
13. Locate elbows where water ows onto the
evaporator platen.
Clip
Inlet
Elbow
8. Remove door.
9. Remove top panel.
10. Remove controller box cover.
11. Disconnect thermistor from controller, pull wire
back to suction line.
Thermistor
Connector
14. Pull clip up. Push inner elbow back and rotate it
until it points straight up, then push it back through
the hole in the back of the freezing compartment.
Inlet
Elbow
Inner
Elbow
15. Pull water inlet elbow out of inner elbow.
June 2008
Page 30
SCCG50 & SCCP50
Service Manual
16. Remove two screws holding freezing
compartment brace to cabinet, lift brace up.
21. Lift bin assembly off the base.
Brace
17. Lift evaporator platen up and tilt back enough
for bin assembly to clear the base.
Note: Prop evaporator assembly up. A 3' length of
3/4" PVC tubing with one end inserted into the cup
mold and the other against the base will hold it up.
The hot gas valve, fan motor, condenser and
compressor are now exposed for service.
Air Bafe
18. Remove air bafe.
19. Unplug 7 wire harness connector (at back of
bin).
20. Remove 1 screw at each corner of the base.
Chassis Shown in Front of Bin Assembly
June 2008
Page 31
Refrigeration Service
SCCG50 & SCCP50
Service Manual
This ice machine use R-134a type refrigerant.
There are specic rules for handling that
refrigerant.
To check for system pressures, add a eld supplied
clamp-on type service valve as a temporary means
of system access. After diagnosis and before nal
repair, replace the clamp-on type valve with valves
that are brazed onto the process tubes of the
system.
Use a low ow of dry nitrogen when brazing on the
system.
Install a new lter drier when replacing a
refrigeration component or after a refrigerant leak
repair.
Evacuate the system to at least 300 microns and
use a micron gauge to measure the evacuation
level.
Weigh in the nameplate charge. The machine is
critically charged and a partial ounce mis-charge
will affect performance.
Membrane Switch
Unplug and check connector pins (left side from
front is pin 1), read about 10 ohms when activating
the button, and OL when not pressing the button:
Pin 2-3 On/Off Switch; 4-3 Clean Reset Switch
Bin Thermostat Altitude Adjustment Screw
Altitude
1000 11 CW
2000 31 CW
3000 52 CW
4000 72 CW
5000 92 CW
6000 111 CW
7000 128 CW
Degrees Rotation to Turn
Adjustment Screw
January 2012
Page 32
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