Stuart SC130 Manual

CUBE ICEMAKER MODELS
SC130 SC220 SC270 SC500
GENERATION 3 CONTROL BOARD
INSTALLATION
AND
SERVICE MANUAL
Revision 1
STUART MANUFACTURING
1 Jayelem Crescent
Padstow NSW 2211 Australia
Telephone [phone]
Fax [phone]
www.icemachines.com.au

PAGE
Specicaons 1
Installaon Instrucons 2
Operaon of Machine 3
Touch Panel 4
Adjustments 5
Trouble Shoong 6—8
Cleaning & Servicing 9
Control Board Flow Chart 10 - 12
Notes 13
Control Board Connecon Diagram 14
Parts List 15
TABLE OF CONTENTS

SPECIFICATIONS
MODEL
WATER All Models Minimum: 140 kpa
OPERATING All Models Minimum: 1 degree Celsius
FAN PRESSURE
CONTROL
WATER
CONNECTION All Models 3/4” BSP male stop cock
DRAINAGE All Models 25mm diameter PVC
SC130 SC270 SC500
ELECTRICAL
REFRIGERATION
240 volts
50 hz
5.6 amps
R404A
232kpa
240 volts
50 hz
8.6 amps
R404A
232kpa
240 volts
50 hz
12.0 amps
R404A
232kpa
ICE WEIGHT (Total both slabs)
PURGE AMOUNT
SC220
240 volts
50 hz
8.6amps
R404A
232kpa
SC130
1,500g
200ml
SC220
2,100g
300ml
SC270
2,700g
300ml
SC500
5,400g
400ml
1

LOCATION
Note! This icemaker must always be installed in a weatherproof environment
1. All models, allow a minimum of 250mm above for correct venlaon.
2. Machine must be LEVEL.
3. Incoming water temperature aects ice producon. Therefore, avoid above ground
plumbing and pipes exposed to direct sunlight.
4. Make sure drain hose has no kinks and has a fall to oor waste.
5. If water pressure is over 350kpa, a pressure reducon valve must be ed.
6. An approved back ow prevenon device must be ed.
START-UP PROCEDURE
1. ENSURE MACHINE IS LEVEL
2. Connect non return valve to tap, then water hose between valve and icemaker and turn
on water. Note! Non return valve must always be ed at the water supply point.
3. Remove front and side panels.
4. Turn on power.
5. Wait unl “Hi oat” light is illuminated, then press and hold RESET buon for about 5
seconds. The machine should now be in normal icemaking mode. i.e. the compressor and
water pump should both be running.
6. Set water purge (see water purge adjustment—Page 4).
7. Allow machine to complete two (2) cycles before making any adjustments (see
Page 3).
8. Replace all panels.
NOTE: On some models the top ice cubes may be slightly thinner than the boom ice
cubes. This is quite normal.
INSTALATION INSTRUCTIONS
2

OPERATION OF MACHINE
3
WARM UP CYCLE
In this mode the compressor is on, hot gas valve open, water pump and ll solenoid o.
(Defrost cycle) The compressor will run for two (2) minutes and will then switch o.
The pump will start and nothing else will happen for a further three (3) minutes.
At the end of this period the display will automacally switch to l__l and the ICE MAKE
CYCLE will commence
On inial start up the warm-up cycle can be cancelled by pushing the reset buon.
WHY A WARM UP CYCLE?
The warm up cycle has been designed in the soware to protect the machine from damage in
the event of a power failure during the freezing cycle. By using the WARM UP (defrost)
CYCLE No. 1 when power is restored, any ice which had formed on the icemaking plates
before the power failure will be fully removed before the ICE MAKE CYCLE recommences.
ICE MAKE CYCLE
The machine will remain in the icemaking cycle unl:
a) the ice storage bin is full, at which me the number is 7 displayed
As soon as ice is removed from the storage bin, allowing the aps to close, the
machine will go back to the start of the ICE MAKE CYCLE.
NOTE: The machine will only go into the ICE BIN FULL MODE aer a defrost and
both aps must be closed before it will return to the ICE MAKE CYCLE.
b) an error occurs and 3, 4, 5 or 9 ashes and the alarm sounds.
Aer a fault has been reced, press the reset buon to return the machine to the ICE
MAKE CYCLE.
ERROR CODES
There are four (4) error codes in the soware
3Did not ll with water in me
4Did not make ice in me
5Did not defrost in me
9Refrigerant high pressure fault
NOTE!
If an error 3 occurs, the machine will aempt to ll every hour unl the water supply is restored.Therefore, if
the water supply is interupted aer-hours, the machine may be funconing normally the next morning and
the only evidence of a problem may be a shortage of ice in the bin. If this becomes a regular occurrance, then
the cause of the interupon should be reced.
For more detailed informaon on the operaon of the machine, refer to the OPERATIONAL FLOW CHARTS on
pages 9 to 11.

4

ADJUSTMENTS
There are only two (2) adustments which can be made to the machine, Water Purge and
Ice Thickness.
WATER PURGE (Parameter 4)
Water purge should be set at approximately 5-10% of the weight of ice per cycle (Check specicaons
chart on page 1 for recommended amount) As the water purge is me acvated, it will vary with water
pressure.
The purge drain is at the R/H rear of the icemaker
While the machine is in the normal ice make cycle (i.e. compressor and pump are running) Press and hold
the RESET buon, aer 3 seconds the display shows –
Release the RESET buon, display ashes 0. To change the number, press the MANUAL DEFROST buon
unl the number 4 is displayed.
Once the number 4 is displayed, press and hold the RESET buon (to conrm selecon) and the display will
change to —
Release the RESET buon.
Now press the “CLEAN BUTTON” to cycle through 1 to 0 with 1 being the minimum and 0 being the
maximum
To return to normal ice making mode, press and hold RESET buon unl display shows –
Note: This funcon only works during freezing cycle.
ICE THICKNESS
The recommended weight of ice per cycle has been factory set with the machine LEVEL and the correct
purge. If the machine is not installed level or there is insucient purge this can alter the weight of the ice
so it is recommended that the purge is set before adjusng the ice weight.
NOTE: Refer to specicaon chart on page 1 for correct ice weights.
Adjustments are made using the – and + buons on the front display board
There is a range of 0 to 9 with 0 being the minimum and 9 being the maximum
To make the ice thicker i.e. heavier, use the + buon
To make the ice thinner i.e. lighter, use the - buon
NOTE: All buons on the control panel have a built in three to ve (3-5) second delay except the ice
thickness adjustment..
i.e. each buon must be depressed for three to ve (3-5) seconds before the funcon will
be acvated
When the power is rst turned on 0 will appear in the window and 1 beep will be heard.
(The beep indicates the version number on the logic board i.e. 1 beep = Version 1) .
The machine will then go to No. 1 warm up cycle.
5

TROUBLE SHOOTING
MICROPROCESSOR DIAGNOSTICS
The 3rd generaon control board has a non volale memory which stores a fault history for the icemaker, plus
other diagnoscs such as total machine running hours, number of cleaning cycles performed and number of
icemaking cycles.
ACCESSING DIAGNOSTIC DISPLAY
While the machine is in the normal ice make cycle (i.e. compressor and pump are running) Press and hold the
RESET buon, aer 3 seconds the display shows a dash –
Release the RESET buon, display ashes 0. To change the number, press the MANUAL DEFROST buon unl the
desired diagnosc parameter is displayed
Available parameters are:
0Access last ve faults
1Number of hours since machine was last cleaned
2Number of cleaning cycles performed
3Number of ice harvests
4Purge adjustment
Once the desired diagnosc number has been selected, press and hold the RESET buon (to conrm selecon)
the display will change to a dash –
Release the RESET buon, display now shows the selected parameter
To adjust the purge press the CLEAN BUTTON to cycle through from 0 to 9
To return to normal ice making mode, press and hold RESET buon unl display shows a dash –
ERROR 3 DID NOT FILL WITH WATER IN TIME (3 Minutes)
If the water level oat does not see a high-water level within 3 minutes of calling for water the machine will stop,
indicate No3 and beep 3 mes every couple of minutes. This is the only fault that will try to restart every hour
unl the water is reinstated. If the reset buon is pressed the machine will try to restart.
Possible causes
(1) Water supply turned o
(2) Water supply line restricted or frozen
(3) Blocked strainer in water solenoid
(4) Faulty water solenoid
(5) Faulty water oat switch
(6) Blocked water lter
(7) Faulty water pump
(8) Faulty water oat switch
6

ERROR 4 DID NOT MAKE ICE IN TIME (40 Minutes)
If the low oat does not drop within 40 minutes from the beginning of the ice making cycle the machine will
shut down and indicate No4 and beep 4 mes every couple of minutes. The machine can be restarted by
pressing the reset buon or turning the power o and on at the power point.
Possible causes
(1) Paral loss of refrigerant
(2) Faulty fan motor
(3) Dirty condenser
(4) Faulty compressor
(5) Hot gas solenoid stuck open
(6) Faulty expansion valve
ERROR 5 DID NOT DEFROST IN TIME (7 Minutes)
If both water curtain switches do not send a signal that harvest is completed aer 7 minutes the machine will
shut down, indicate No 5 and beep 5 mes every couple of minutes. The machine can be restarted by press-
ing the reset buon or turning the power o and on at the power point.
Possible causes
(1) Faulty hot gas solenoid
(2) Dirty icemaking plate
(3) Faulty curtain ap switch
(4) Paral loss of refrigerant
(5) Ice too thin - will not open water curtain
ERROR 9 HIGH PRESSURE FAULT
If refrigerant pressure exceeds 3100kpa the machine will shut down and indicate No9
Possible causes
(1) Dirty condenser
(2) Failed fan motor
(3) Faulty pressure sensor
(4) Faulty compressor
(5) Very high ambient temperature at locaon
TROUBLE SHOOTING CONTINUED
7

CHECKING OPERATION OF REED SWITCHES
The curtain ap switches and the high and low oats have indicator (red LED) lights on the main control board.
To check the operaon of these switches, set the machine in the WARM UP CYCLE with no water in the water
trough.
CURTAIN FLAP SWITCHES
By moving the water curtains ,the lights marked FLAP 1 and FLAP 2 should be on when the curtain is closed and
o when the curtain is about 10 to 15mm open.
LOW FLOAT
With the low oat all the way down, the indicator light should be o, but by moving the oat up the indicator
light should come on.
NOTE: If the reverse is happening, rotate the whole oat switch assembly 180degrees
HIGH FLOAT
With the high oat in down posion, the light should be o, but by moving the oat up, the light should come
on.
NOTE: If the reverse is happening, rotate the whole oat switch assembly 180degrees
ELECTRONIC CONTROL BOARD FUSE - MAIN CONTROL BOARD
The main control board is protected by a fuse. If this fuse should blow it will isolate the whole machine. The
correct replacement fuse is a slow blow 3.15 amp HRC Ceramic.
DO NOT USE GLASS TYPE FUSES
When changing the control board ensure that the incoming acve goes to the relay tab marked COM.
Curtain ap switches
High oat switch
Low oat switch
8

SERVICE MODE 8
Aer 3000 hours of ice making me there will be 10 beeps and number 8 will ash 10 mes indicang that
the machine requires servicing. This will occur every hour unl the machine has been put through a clean
cycle. Once the clean cycle has been carried out the machine starts counng the hours again. Note: Ice
making me does not include bin full me.
CLEAN CYCLE 6
Cleaning of the icemaker is recommended on a regular basis, at least three mes a year.
1. Turn o water and t new water lter and purge water supply line.
2. Empty the remaining ice in storage bin into a clean hygienic sealed receptacle and seal to prevent
contaminaon. (Always dispose the boom 20% of ice in bin as it will most likely be dust
contaminated).
3. Remove front, top and right side panels, visually check all components are in sasfactory condion and
do not require replacement due to mechanical or electrical breakdown.
4. With the machine in ICE MAKE CYCLE press & hold the clean buon unl the machine goes into clean
mode 6, wait for the water trough to ll and the ll light goes o then remove the drain cap from the
trough and allow all the water to drain away and replace the drain cap.
5. Mix the specied quanty of cleaning medium as per manufacturers specicaons in a separate
container and pour into water trough and allow to circulate for 25 minutes maximum or unl plate is
clean. Then drain the water trough and replace drain cap.
6. Mix up sanizer in a container as per manufacturers specicaon and pour into water trough and allow
to circulate for 5 minutes. Remove drain cap and drain water trough then replace drain cap.
7. Press the ll buon unl the water overows the trough, remove the drain cap and allow all the water
to drain away, replace cap, press ll buon again, when full let circulate for 5 minutes before draining
trough.
8. Replace drain cap and PRESS RESET. When display returns to NORMAL ICE MAKER CYCLE switch o
power.
9. Vacuum or blow out condenser ensuring dust does not contaminate the surrounding area.
10. Wipe out Compressor secon removing dust and grime around fan motor. Spin fan and check for noisy
bearings.
11. Remove pump from trough and drain out and clean out any sludge remaining in trough. Dismantle
water distributor and clean with bole brush taking note that all water holes are clean and
unobstructed. Reassemble and ret distributor and water pump.
12. Sanize storage bin as per manufacturers specicaons.
13. Start machine & check all machine signal funcons, ensuring board lights operate when curtains, high /
low switches are acvated.
14. Check purge on ll cycle and adjust if required. (See Page 3)
15. Aer second ice drop check thickness and adjust if required. (See Page 3)
16. Replace machine panels.
17. Clean down all external surfaces.
18. Replace ice into storage bin.
Note: Using none-approved cleaning medium may void ice making plate warranty
9

Run self test procedure
Compressor ON, Hot gas ON, fill to
Hi then run on hot gas for 2 minutes
Compressor OFF, pump ON
delay for 3 minutes
Is bin
Full ?
Fill ON, Compressor ON, Pump ON,
Hot Gas OFF, Start Fill timmer
Wait for correct quantity of water in
tray or fill t im er t o t im e out
Reset button
pushed
Fill solenoid OFF Start Error Timer
for icemaker cycle
Error
Timer?
No
Go To
DEFROST
Go to Man.
Defrost
Go to
Clean
Didn't Fill In Time
No
Yes
Go to Bin
Full
Yes
No
Note: 5
See Note 1
Power Up
FILL ERROR
ICE MAKE ERROR
Ice Make Cycl e Starts
See Note 3
Start Up Defrost Stage 1
Start Up Defrost Stage 2
Didn't make Ice in Time
Manual
defrost
Clean
Button
Yes, Manual Defrost button
pushed
Yes, Clean Button pushed
Lo
Float?
Yes, the correct quantity of
Water has been used to make ice
No
No
See Note 2
See Note 2
Retry every 60 minutes
See Note 7
Clean
Timer?
No
error '8' & sound alarm
ten times , repeat every
hour
Yes
7
3
4
Display
Display
Display
Note: 4
Note 6
10

Fill & Pump On Compressor Off
Water
Full?
(Hi Float)
No
Man Fill
Button
Pres sed
Reset
Button
Pushed
Fill Solenoid Off
Fill ON
Yes
Return To
Normal Ice
Make
Yes
No
No
Yes
Clean Cycle Processing
Clean Cycle
Reset Clean Hour Counter
6 Display
Note 6
11

Pump OFF Hot - gas solenoid ON
Both
flaps
operated
Defrost
Timed
out
No
No Yes
Return
To Make
ice Cycle
Yes
Did both
flaps close
after opening
Yes
Compressor,Pump,Fill OFF
Hot Gas solenoid On
No
Defrost
Is This
a M anal
Defrost ?
No
Yes
Manual
Button
Pressed?
Yes
No
Bin Ful l
Defrost Error
Bin Ful l
BIN FULL and DEFROST Processing
5 Display
See Note 7
12

Note 1.
Self Test Procedure.
Fail = Buzzer sounds connuously.
Pass = Buzzer beeps several mes, the number of beeps indicates the control
board version number, e.g. 1 beep for version 1 etc.
Note 2.
The hot gas solenoid is always opened for 15 seconds before starng the compressor,
this allows the gas pressures to equalise before the compressor starts.
Note 3.
Pushing the reset buon during the inial start up defrost will cancel the defrost and place
the machine in normal ice making mode.
Note 4.
Bin Full is indicated by one or more of the ice curtains remaining open aer an ice drop.
Note 5.
The correct quanty of water during ll is signalled by the high oat switch, the water lls unl the
top oat switch operates. The water will connue to ll for a period of me aer reaching the high
oat. This is the purge me.
Note 6.
The clean mer is set for 3,000 hours, this mer is reset when the manual clean cycle
is acvated.
Note 7.
The rst me this error occurs the machine will restart at “Power Up” if the same error is detected
aer Power Up the machine will shut down and the appropriate error number will ash on the display.
13

Wiring harness idencaon numbers and colours
1. Brown HOT GAS
2. Red PUMP
3. Orange FAN
4. Yellow WATER INLET
5. Green LOW FLOAT
6. Blue HIGH FLOAT
7. Purple FLAP 1
8. Grey FLAP 2
9. White FAN CONTROL
0. Black HP CONTROL
15

DESCRIPTION
Compressor
Fan/motor assy.
Fan control
Curtain Assembly—Front
Curtain Assembly—Rear
Evaporator Assembly
Solenoid valve - water
Solenoid valve - hot gas
Capillary tube
Expansion valve body
Expansion valve orice
Control board
Display board
Fuse - 3.15 amp
SC130
050654
050348
050622
050774
050773
050478SP
050023
050704
1.62mm
2500mm
———
———
050844F
050877
050011
SC220
050766
050348
050622
050757
050756
050751
050023
050704
1.78mm
2600mm
———
———
050844F
050877
050011
SC270
050766
050348
050622
050776
050775
050523SP
050023
050704
1.78mm
2250mm
———
———
050844F
050877
050011
SC500
050841
050620
050622
050778
050777
050524SP
050023
050705
———
———
050850
050851
050844F
050877
050011
PARTS LIST
16

MANUFACTURER'S LIMITED LABOUR AND PARTS WARRANTY
STUART COMMERCIAL ICEMAKERS
Model SC130, SC220, SC270, SC500
CERISUN PTY. LTD. trading as STUART MANUFACTURING at 1 JAYELEM CRESCENT PADSTOW warrants to the original owner/user that any
STUART commercial icemaker manufactured on or aer January 1st 1997 shall be free of defects in material or workmanship under normal
and proper use and maintenance service as specied by STUART MANUFACTURING and upon proper installaon and start-up in accordance
with the instrucon manual supplied with the Product.
The obligaon under this warranty is limited to:
(1) associated and approved labour costs for a period of two years aer the date of original installaon;
(2) the repair and or replacement of parts or assemblies that in the opinion of STUART MANUFACTURING are
defecve, for a period of two years aer the date of original installaon;
(3) the supply or repair of the electronic control board(s) for a period of two years aer the date of original installaon.
The labour warranty shall include straight me labour charges at the product locaon only and shall exclude charges for travel me, mileage
or other premium charges.
Any labour required to full the warranty obligaon must be performed by a refrigeraon service company qualied and accepted by STU-
ART MANUFACTURING.
This warranty does not include parts or labour coverage for components failure or other damage resulng from:
*external electrical power failure or miswiring to the Product for any reason
*external water supply failure or plumbing problems to the Product for any reason
*external drain line malfuncon
*adverse operang condions as set forth in the owner/user manual for the Product.
All claims for labour or parts must be made through the original reseller. The defecve part for which reimbursement is claimed, together
with the service invoice, must be returned to STUART MANUFACTURING, freight pre-paid, within een days from date of service to be
eligible for labour and parts warranty coverage. All replacement parts must be approved STUART parts.
Incidents of failure that do not require the replacement of a part shall be explained in sucient detail on the service invoice to
idenfy the failure. All claims shall include the product model number, serial number, original date of installaon and customer idenca-
on.
The foregoing warranty shall not apply to:
(1) Faults caused by dirty water distribuon systems or icemaking plates
(2) Adjustments to ice thickness or purge levels caused by incorrect installaon.
(3) any part or assembly
(a) that has been altered, modied or changed
(b) that has been subjected to misuse, abuse, neglect or accidents or
(c) any Product or part on which the serial or model number has been removed or altered
(4) any Product that has been installed and/or maintained inconsistant with STUART technical publicaons
(5) any product that has been installed or is located outside Australia.
The two years compressor parts warranty shall not apply when the Product's refrigeraon system is modied with a condenser, heat re-
claim device, or parts and assemblies other than those manufactured by STUART MANUFACTURING unless STUART
MANUFACTURING has accepted modicaon for specic installaon in wring.
STUART MANUFACTURING assumes no liability for misuse or inadequate maintenance of the Product.
In no event shall the owner/user be entled to recover incidental or consequenal damages, including but not limited to damages for incon-
venience, ice purchase, rental or replacement equipment, loss of prots or other commercial loss.
Warranes stated above are the only warranes made in connecon with the sale and distribuon of the Products.
ANY AND ALL OTHER EXPRESSED, STATUTORY AND IMPLIED WARRANTIES APPLICABLE TO THE PRODUCT,
INCLUDING, WITHOUT LIMITATIONS, ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR USE ARE EXPRESSLY DISCLAIMED.
The warranty informaon set forth above shall be governed by and construed in accordance with the laws of the state of NSW and, if appli-
cable the laws of Australia. The labour warranty, as stated is extended only to the original owner/user and is not assignable to any other
owner or user.

WARRANTY CLAIM GUIDELINES
Model SC130, SC220, SC270, SC500, SC1000, SC2000
As from January 1st 1993 all STUART ICEMAKERS will carry a standard two years warranty. This covers two years labour, two years on parts
and two years on compressor failure, provided warranty condions are met and installaon is in accordance with published standards.
All dates are from the original date of installaon. This date is assumed to be a maximum of eight (8) weeks from the date of invoice to the
dealer.
Warranty claims are condional on the following:
(1) All claims for labour or parts must be made through the original reseller.
(2) The defecve part must be returned with the service invoice to STUART MANUFACTURING, freight pre-paid, within 15 days of date of
service. Details of End User, Model, Serial Number and Date of Installaon of the product must be provided with the claim.
(3) All replacement parts must be detailed and be approved STUART parts.
(4) All labour only claims must be explained in sucient detail on the service invoice to properly idenfy the nature of the failure.
(5) The labour warranty includes standard straight me charges at the installaon locaon only and does not include charges for travel
ling me, mileage or other premium charges.
(6) When consumables such as driers,refrigerant etc. are supplied by the service agent, the cost allowed will be the
Refrigeraon Wholesalers list price only.
(7) If a compressor is faulty and requires replacement, the service agent MUST contact Stuart Manufacturing before obtaining a replace
ment.
The warranty will not apply in the following circumstances:
(1) When any part, assembly or ice machine:
(a) has been altered, modied or changed
(b) has been subject to misuse, neglect or accident
(c) where the serial number or other idencaon has been removed or altered.
(2) When the product has been installed and or maintained in a manner inconsistant with the approved procedure or STUART technical
publicaons.
(3) The two years compressor warranty will not apply where the refrigeraon system has been modied with a condenser, heat reclaim
device or part or assembly not approved by STUART MANUFACTURING.
GENERAL
As from 1st January, 1993 the following warranty will apply to all spare parts:
(a) Replacement parts exchanged while the original equipment is sll under manufacturers warranty will be covered on a pro-rata
basis up to the warranty expiraon of equipment in which they are installed.
(b) Warranty on spare parts other than the above is three (3) months from the date of installaon as evidenced by suitable docu-
mentaon or eight (8) weeks from the invoice date of sale to the dealer.