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 (02) 9773 3711
Fax (02) 9773 4400
www.icemachines.com.au
PAGE
Specicaons 1
Installaon Instrucons 2
Operaon of Machine 3
Touch Panel 4
Adjustments 5
Trouble Shoong 6—8
Cleaning & Servicing 9
Control Board Flow Chart 10 - 12
Notes 13
Control Board Connecon 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 venlaon.
2. Machine must be LEVEL.
3. Incoming water temperature aects ice producon. 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 reducon valve must be ed.
6. An approved back ow prevenon 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 unl “Hi oat” light is illuminated, then press and hold RESET buon 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 boom 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 automacally switch to l__l and the ICE MAKE
CYCLE will commence
On inial start up the warm-up cycle can be cancelled by pushing the reset buon.
WHY A WARM UP CYCLE?
The warm up cycle has been designed in the soware 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 unl:
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 aer 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.
Aer a fault has been reced, press the reset buon to return the machine to the ICE
MAKE CYCLE.
ERROR CODES
There are four (4) error codes in the soware
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 aempt to ll every hour unl the water supply is restored.Therefore, if
the water supply is interupted aer-hours, the machine may be funconing 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 interupon should be reced.
For more detailed informaon on the operaon 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 specicaons
chart on page 1 for recommended amount) As the water purge is me acvated, 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 buon, aer 3 seconds the display shows –
Release the RESET buon, display ashes 0. To change the number, press the MANUAL DEFROST buon
unl the number 4 is displayed.
Once the number 4 is displayed, press and hold the RESET buon (to conrm selecon) and the display will
change to —
Release the RESET buon.
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 buon unl display shows –
Note: This funcon 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 insucient purge this can alter the weight of the ice
so it is recommended that the purge is set before adjusng the ice weight.
NOTE: Refer to specicaon chart on page 1 for correct ice weights.
Adjustments are made using the – and + buons 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 + buon
To make the ice thinner i.e. lighter, use the - buon
NOTE: All buons on the control panel have a built in three to ve (3-5) second delay except the ice
thickness adjustment..
i.e. each buon must be depressed for three to ve (3-5) seconds before the funcon will
be acvated
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 generaon control board has a non volale memory which stores a fault history for the icemaker, plus
other diagnoscs 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 buon, aer 3 seconds the display shows a dash –
Release the RESET buon, display ashes 0. To change the number, press the MANUAL DEFROST buon unl the
desired diagnosc 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 diagnosc number has been selected, press and hold the RESET buon (to conrm selecon)
the display will change to a dash –
Release the RESET buon, 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 buon unl 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
unl the water is reinstated. If the reset buon 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 buon or turning the power o and on at the power point.
Possible causes
(1) Paral 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 aer 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 buon 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) Paral 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 locaon
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 operaon 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 posion, 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 acve goes to the relay tab marked COM.
Curtain ap switches
High oat switch
Low oat switch
8
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