Skope SK650-2 Service manual

SK650-2
SKOPE Gen2: Single Door Chiller
Vertical Display and Storage
Operating and Service Manual MAN0516 Rev. 3.0 August 2005 edition

SK650-2
SKOPE Gen2: Single Door Chiller
Designed and Manufactured by
New Zealand
SKOPE INDUSTRIES LIMITED
PO Box 1091, Christchurch
New Zealand
Freephone: 0800 947 5673
Fax: [phone]
E-mail: [email protected]
Website: www.skope.co.nz
Australia
SKOPE AUSTRALIA PTY LTD
A.C.N. 000 384 270
PO Box 7543, Baulkham Hills B.C.
NSW 2153, Australia
Freephone: 1800 121 535
Fax: [phone]
E-mail: [email protected]
Website: www.skope.com.au
CONTACT ADDRESSES
i

SK650-2
SKOPE Gen2: Single Door Chiller
SK650-2
SKOPE Gen2: Single Door Chiller
Operating and Service Manual
MAN0516
Rev. 3.0 August 2005 edition.
Copyright © 2003
SKOPE Industries Limited.
All rights reserved.
SKOPE and CYCLONE are
registered trademarks of
SKOPE Industries Limited.
SKOPE Industries Limited reserve the
right to alter specifications without
notice.
ii

SK650-2
SKOPE Gen2: Single Door Chiller
1 SPECIFICATIONS
1.1 Cabinet and Refrigeration Unit . . . . . . . . . . . . . . . . . . . . . . . 7
2 OPERATION
2.1 Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Operation of Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3 Loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
2.4 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3 ELECTRONIC CONTROLLER
3.1 Controller Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
3.2 Controller Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
3.3 Programming Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.4 Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
3.5 Alarm Displays. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
3.6 Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
4 SERVICE INSTRUCTIONS
4.1 Interior Side Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
4.2 Door. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.3 Sign Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
4.4 Refrigeration Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.5 Pressure Temperature Chart . . . . . . . . . . . . . . . . . . . . . . . .42
4.6 Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
TABLE OF CONTENTS
iii

6SK650-2
SKOPE Gen2: Single Door Chiller
5 WIRING DIAGRAMS
5.1 Model: SK650-2 (Type V60BA) . . . . . . . . . . . . . . . . . . . . . 48
5.2 Model: SK650-2 (Type V60BB) . . . . . . . . . . . . . . . . . . . . . 50
6 SPARES
6.1 Cabinet Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
6.2 Interior Side Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
6.3 Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
6.4 Sign Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
6.5 Refrigeration Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
6.6 Refrigeration Unit Junction Box . . . . . . . . . . . . . . . . . . . . . 57
TABLE OF CONTENTS

7
SK650-2
SKOPE Gen2: Single Door Chiller
1.1 Cabinet and Refrigeration Unit
Cabinet Construction
Exterior/Interior: White powdercoat on galvanised steel
Insulation: 50mm thick, polyurethane foam
Cyclo-iso Pentane blowing agent: C5H10/C5H12
Dimensions
Height: 2195mm
Width: 740mm
Depth: 700mm
Floor area: 0.52m2
Internal volume: 610 litres
Refrigeration Unit
SKOPE top mounted integral Cyclone®refrigeration unit:
Nominal capacity: 581 Watts
Compressor: Electrolux GLY90RA
Refrigerant: R134a / 450 grams
Electrical
230-240 Volts a.c. 50 Hz, single phase power supply
Run Amps: 2.77 Amps
Lighting
Single or twin sidelights: 35 Watt T5 fluorescent tube
(OSRAM FH 35W/860 Daylight) Ø16mm x 1450mm
Illuminated Sign
1 x 14 Watt T5 fluorescent tube
(OSRAM FH 14W/860 Daylight) Ø16mm x 550mm
Door
Self-closing, aluminium framed, double glazed, toughened safety glass
Shelves
5 x adjustable height, white plastic coated, steel wire shelves
Table 1: Specifications
SPECIFICATIONS
1

8SK650-2
SKOPE Gen2: Single Door Chiller
2.1 Safety Information
When using any electrical appliance, safety precautions should
always be observed. Read these instructions carefully, and retain for
future reference.
• When used by, or near, young children or infirm persons, close
supervision is necessary. Young children should be supervised
to ensure that they do not play with the appliance.
•DoNOT use this appliance for other than its intended use.
•DoNOT cover the grilles or block the entry or exhaust of airflow
by placing objects up against the refrigeration unit.
•DoNOT probe any opening.
• Only use this appliance with voltage specified on the rating label.
• Ensure adequate ventilation of the SKOPE refrigeration unit.
• Be careful not to touch moving parts and hot surfaces.
• Regulations require that all electrical work be carried out by
authorised persons. For your own safety, and that of others,
ensure this is done.
• If the supply cord becomes damaged, it must be replaced by a
SKOPE authorised service agent, or similarly qualified person,
in order to avoid a hazard.
• If the refrigeration units are required to be installed or removed
from the cabinet, ensure all necessary safety precautions are
observed.
Warning: Do NOT overload power supply.
Caution:
Disconnect the cabinet from the mains power supply before
attempting any cleaning or maintenance.
OPERATION
2

9
SK650-2
SKOPE Gen2: Single Door Chiller
2.2 Operation of Machine
Plug in the cabinet and check operation of the refrigeration unit,
electronic controller and cabinet lights.
Refrigeration unit
The compressor and evaporator and condenser fans should all
operate initially. This may be verified by listening for compressor
switch on, and checking for air circulation inside the cabinet.
The compressor and condenser fan should switch off when the
cabinet internal temperature reaches approximately +2°C, and on
again at approximately +4°C. The internal cabinet air will continue to
circulate at all times.
Electronic controller
The electronic controller will either display the internal cabinet tem-
perature or the controller set point. The compressor ‘on’ LED will
indicate that the compressor is operating (see Figure 2 on page 12).
Cabinet lights
The lights which illuminate the top sign and cabinet interior are
initially on, and will stay on permanently. The lighting will require a
period of time to stabilise following initial start up.
OPERATION
2

10 SK650-2
SKOPE Gen2: Single Door Chiller
2.3 Loading
The shelves may be positioned at different heights to suit various
products. Each shelf is held in place with four shelf clips. Always
ensure that the shelf clips are securely engaged in each of the four
shelf support strips. The support strips are marked with a ‘+’ for easy
location of the shelf clips (see Figure 1 below).
When loading the shelves with product:
• ensure to allow air space around all packages etc, for even
cooling and efficient operation.
• leave an airspace of at least 75mm (3") above packages etc. on
the top shelf.
• do not allow products to overhang the front of the shelf as this
could prevent the door from shutting or cause glass breakage.
OPERATION
2
Figure 1: Shelf Clip
Shelf Support Strip
Shelf Clip
‘+’ Mark
Shelf

11
SK650-2
SKOPE Gen2: Single Door Chiller
2.4 Cleaning
When necessary, wipe both interior and exterior of the cabinet with
a damp cloth. Ensure the cabinet is disconnected from the mains
power supply before cleaning the cabinet.
Do not wipe the sealant off the door gasket, as the sealant ensures
the door gasket forms a good seal with the cabinet.
Periodic cleaning of the condenser coil is also recommended.
Condenser coil
The condenser coil MUST be kept clean for efficient and reliable
operation. To ensure trouble free performance, it is recommended
that on a regular basis the cabinet be isolated from mains power
supply and a vacuum cleaner used to remove dust and fluff from the
condenser coil.
The condenser coil should be brushed clean once a month, and
blown clean by qualified service personnel, every six months. The
condenser coil is situated behind the sign unit. To access the
condenser coil:
1. Disconnect the cabinet from the mains power supply.
2. Loosen the sign retaining clip on the top of each side panel.
3. Lift the sign unit up, to disengage from the sign sides.
4. Disconnect the sign ENSTO plug from the electrical box socket,
and remove the sign unit from the cabinet.
Caution:
Disconnect the cabinet from the mains power supply before
cleaning the condenser coil.
OPERATION
2

12 SK650-2
SKOPE Gen2: Single Door Chiller
3.1 Controller Display
Item Key Function
1SET: Press to display target set point. In programming mode it selects
a parameter or confirms an operation
2DEFROST: Press to start a manual defrost
3UP: Press to see the maximum stored temperature. In programming
mode it browses the parameter codes, or increases the displayed value
4DOWN: Press to see the minimum stored temp. In programming mode
it browses the parameter codes, or decreases displayed value
5Compressor on LED indicator
6Defrost cycle on LED indicator
7Set Point displayed LED indicator
8Decimal point LED indicator
Key Combinations:
+ Press both keys simultaneously, to lock and unlock the keypad
+ Press both keys simultaneously, to enter the programming mode
+ Press both keys simultaneously, to return to room temperature display
Table 2: Controller Operation
ELECTRONIC CONTROLLER
3
1
35
2
4
Figure 2: Controller Display
6
7
8

13
SK650-2
SKOPE Gen2: Single Door Chiller
Meaning of LEDs
Each LED function is described in the following table:
LED Mode Function
ON Compressor enabled
Flashing Anti-short cycle delay enabled
ON Defrost enabled
Flashing Drip time in progress
Flashing Programming mode (see page 15)
ON The Set Point is displayed
Table 3: LED Functions
3.2 Controller Operation
The SKOPE electronic controller controls and displays the cabinet
temperature. The preset temperature setting controls internal air
temperature between 2°C and 4°C.
The electronic controller also signals and records temperature
alarms, together with their duration and maximum value reached
(see Table 5 on page 18).
To ensure efficient operation, the electronic controller has a built in
minimum off cycle time of 3 minutes and features regular timed
defrost cycles. During the defrost cycle, the compressor switches off
and the evaporator fan stays on.
ELECTRONIC CONTROLLER
3
+

14 SK650-2
SKOPE Gen2: Single Door Chiller
3.3 Programming Controller
The controller keypad must always be locked, to prevent unauthor-
ised modification.
To unlock the keypad (to modify parameters)
Press both the UP and DOWN keys until ‘Pon’
is displayed.
How to lock the keypad
1. Press and hold both the UP and DOWN
keys for more than 3 seconds.
2. The ‘PoF’ message will be displayed and
the keypad will be locked. At this point it will be possible only to
see the Set Point or maximum or minimum temperature stored.
3. If a key is pressed for more than 3 seconds, the ‘PoF’ message
will be displayed.
To display the Set Point
Press, and immediately release the SET key. The
display will show the Set Point value, and the Set Point
LED will be highlighted.
To change the Set Point
1. Push and hold the SET key for
more than 2 seconds.
2. The value of the Set Point will be
displayed, and the LED will start blinking.
3. To change the Set value, push the UP or DOWN keys.
4. To memorise the new Set Point value, push the SET key again
or wait 15 seconds.
ELECTRONIC CONTROLLER
3

15
SK650-2
SKOPE Gen2: Single Door Chiller
To start a manual defrost
Push and hold the DEFROST key for more than 2
seconds.
To change a parameter value
1. Enter the programming mode by
pressing and holding both the
SET and DOWN keys for 3 sec.
( and start flashing).
2. Select the required parameter.
3. Press the SET key to display the Set value (now only the
LED is flashing).
4. Press the UP or DOWN keys to change the Set value.
5. Press the SET key to store the new value and move to the
following parameter.
6. To exit: Press both the SET and UP keys, or wait 15 seconds
without pressing any keys.
7. To lock in new parameter value: after one minute operation,
disconnect and reconnect cabinet into the mains power supply.
NOTES:
1. The Set value is stored even when the procedure is exited by
waiting for the time-out to expire.
2. Dependent on customer requirements, the SKOPE electronic
controller has different parameter configurations. Parameter
configuration 160 = Beverage, 170 = Food, and 200 = Set Point
display (see ‘Controller Parameters’ in Table 4 on page 17).
To establish correct controller parameter configuration, see
label on controller housing (see Figure 3 on page 19).
ELECTRONIC CONTROLLER
3

16 SK650-2
SKOPE Gen2: Single Door Chiller
To see the minimum temperature
1. Press and release the DOWN key.
2. The ‘Lt’ message will be displayed, followed by the minimum
temperature.
3. Press the DOWN key again, or wait 5 seconds, to restore the
normal display.
To see the maximum temperature
1. Press and release the UP key.
2. The ‘Ht’ message will be displayed, followed by the maximum
temperature recorded.
3. Press the UP key again, or wait 5 seconds, to restore the
normal display.
To reset the maximum and minimum
temperature
1. Press and hold the SET key for more than 3 seconds, while the
maximum or minimum temperature is displayed. The ‘rSt’
message will be displayed.
2. To confirm the operation, the ‘rSt’ message starts flashing and
the normal temperature will be displayed.
ELECTRONIC CONTROLLER
3

17
SK650-2
SKOPE Gen2: Single Door Chiller
3.4 Parameters
Display SKOPE Setting Min Max Description of Parameter
SET POINT PARAMETERS
Set 2°C LS US Set Point
Hy 2°C 0.1°C 25.5°C Differential
LS -1 °C -50°C Set Minimum Set Point
US 15 °C Set 150°C Maximum Set Point
PROBE PARAMETERS
Ot 0.7 °C -12°C 12°C Thermostat probe calibration
OE 0°C -12°C 12°C Condenser probe calibration
CONTROL PARAMETERS
OdS 0Minutes 0255 Outputs delay at start up
AC 3Minutes 050 Anti-short cycle delay
DISPLAY PARAMETERS
CF °C °C / °F °C °F Temperature measurement unit
rES dE -in dE Resolution
LoD P1 -P1, P2 or SP Local display
DEFROST PARAMETERS
IdF 6Hours 1120 Interval between defrost cycles
MdF 12 Minutes 0255 Maximum length for defrost
dFd dEF -rt, it Set, DEF Displaying during defrost
dAd 20 Minutes 0255 Maximum display delay after defrost
ALARM PARAMETERS
ALc Ab -rE Ab Temperature alarms configuration
ALU 12 °C -150°C Maximum temperature alarm
ALL -2 °C -50°C ALU Minimum temperature alarm
AtH 1°C 0.1°C 25.5°C Differential for temperature alarm in cabinet
ALd 240 Minutes 0255 Temperature alarm delay
dAO 24 -0 Mins 23.5 Hours Delay of temperature alarm at start up
tbA n - n y Alarm relay silencing
PA2 58 °C -40°C AU2 Condenser over temperature
AU2 65 °C -40°C 110°C AUE Condenser alarm temperature
ACH 5°C 0.1°C 25.5°C Differential for condenser alarm temp recovery
dL2 2Minutes 0255 Condenser alarm delay
dA2 0hh:mm 0 Mins 23.5 Hours Condenser alarm temperature delay at start up
AOP CL -OP CL Alarm relay polarity
OTHER PARAMETERS
dP1 -°C - - Thermostat probe read out
dP2 -°C - - Condenser probe read out
rEL - - - - Software release
Ptb - - - - Map code
Table 4: Controller Parameters
ELECTRONIC CONTROLLER
3

18 SK650-2
SKOPE Gen2: Single Door Chiller
3.5 Display Alarms
A flashing LED indicates an alarm. Possible alarm displays are:
Alarm Description
Stage ONE - Maintenance required:
Immediately attend condenser (for auto alarm reset).
Stage TWO - Refrigeration Shut-Down:
Condenser over-temperature has shut-down system and
cabinet lighting. Attend condenser. To reset alarm, cabinet
must be replugged into power supply. For repeat alarms,
contact an authorised service agent.
Faulty Ambient probe (internal cabinet - return air)
Faulty High Temperature probe (condenser)
Internal cabinet - LOW temperature alarm
Internal cabinet - HIGH temperature alarm
Table 5: Controller Display Alarms
Note: The refrigeration system and cabinet lighting shut down with
‘P1’, ‘P2’ and ‘CSd’ alarms.
Alarm Recovery
• Condenser over temperature alarm ‘COH’ recovers when the
condenser is either cleaned or cools down.
• Condenser alarm ‘CSd’ temperature recovers by replugging the
cabinet power supply (or isolation switch). In this case, all the
alarms are reset.
• Cabinet temperature alarms ‘LO’ and ‘HI’ automatically stop at
temperature recovery.
ELECTRONIC CONTROLLER
3

19
SK650-2
SKOPE Gen2: Single Door Chiller
3.6 Replacement
If the SKOPE electronic controller has a suspected fault, care must
be taken to ensure accurate diagnosis. The controller has various
programmable parameters that effect operation such as time delay
and defost modes. Any suspected failure must be double checked.
Confirm all wiring and terminations are correct. Check probe resist-
ance is correct, and replace any faulty components.
Controller NTC probe resistance
Temperature Resistance
(Ohms)*
-10°C 42.5
-5°C 34.0
0°C 27.3
5°C 22.1
10°C 18.0
20°C 12.1
30°C 8.3
40°C 5.8
50°C 4.2
* Tolerance: plus or minus2.4%
Table 6: NTC Probe Resistance
ELECTRONIC CONTROLLER
3
Figure 3:
Controller Housing (open)
Electronic Controller Controller
Housing
Parameter Configuration Label

20 SK650-2
SKOPE Gen2: Single Door Chiller
Controller removal
The electronic controller is mounted on the right hand side of the
cabinet control panel. The controller is contained inside a metal
housing which is attached to the control panel by two screws. To
reomove the controller:
1. Disconnect the cabinet from the mains power supply.
2. Remove the sign unit (see ‘To remove the sign unit’, page 31).
3. Undo the two screws underneath the control panel, directly
under the controller display, and lift the controller housing up
and forward to clear the control panel.
4. Remove the two top fixing screws from the housing, and bend
the housing lid back to gain access to controller connections.
5. Disconnect the terminals from the back of the controller, and
then remove the controller from the housing.
6. When re-fitting the controller, ensure the terminals engage
firmly into the back of the controller, and the housing lid is
screwed down to hold the controller firmly in place (see Figure
4 below).
ELECTRONIC CONTROLLER
3
Figure 4: Controller Housing (closed)
Controller Cable
Electronic Controller
Controller Housing
Probe Cables Cord Grip
Top Fixing Screws
Housing Lid
Parameter Configuration Label