Stuart SC130 Manuale

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

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

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

OPERATION OF MACHINE

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.

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.

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

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

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

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