HB400 Operating Instructions
Contents
1. 11 3 2 Operation of Machine 12 NE RE acie sete TO sce a Ete ou eu d 14 34 Cleaning secs e aue DE AE ER RE Ee EE 14 4 ELECTRONIC CONTROLLER 41 Controller 5 15 4 2 Controller 16 4 3 Operation of Controller 17 44 Parameters 19 45 Alarms and Signals 22 4 6 Replacement 25 5 SERVICE INSTRUCTIONS 5 1 System Service Notes 26 5 2 Pre Service Check Information 28 5 3 gt Interior Side Light gt sz sars aan rm Rem dn ed 29 5 4 DOORS ran Baek ee ene 30 55 Refrigeration 32 5 6 Pressure Temperature 35 5 7 Trouble Shooting 36 TMEF650 SKOPE Single Door Economy Freezer TABLE OF CONTENTS 6 6 1 7 7 1 7 2 7 3 8 8 1 WIRING DIAGRAM Model 650 40 SPARES Cabinet Assembly 42 DOOR etat aurem RC xut e VEN MPa EM T 43 Refrigeration 44 NOTES NGS eam Ceci du panatta HR tame E 45 TMEF650 SKOPE Single Door Economy Freezer 1 sPECIF2. Top Mounted Economy Freezer 4 ELECTRONIC CONTROLLER 4 2 Controller Components COM PONENT DESCRIPTION Microprocessor Located behind ventilated plain facia panel Controller Module Located in control box Performs processor switching Module Connector Cable Flat black cable connecting module to microprocessor Probes 2 x NTC probes are used Acontrolling probe located on a receptacle in the evaporator box called a Cabinet Ambient Probe An evaporator probe located within the evaporator coil referred to as a Defrost Probe 1 6 TMEF650 SKOPE Single Door Economy Freezer 4 ELECTRONIC CONTROLLER 4 3 Operation of Controller Microprocessor The operation of this freezer is controlled by a pre programmed microprocessor The Microprocessor display indicates the tempera ture of the cabinet ambient probe except during a defrost where the temperature of the cabinet probe is locked in and during an alarm condition The display also has LED indicators showing the activation of the compressor the fan and the defrost At alarm activation the display indicates the type of alarm signal and an audible alarm sounds The alarm can be muted at the controller Changing Controller Settings To access entry 1 Press and hold PRG and SEL simultaneously for more than 5 seconds until 00 is displayed 2 Press aux up until 22 is displayed 3 Press SEL to confirm selection The first parameter
3. Chart TMEF650 Top Mounted Economy Freezer 39 WIRING DIAGRAM 6 1 Model TMEF650 Figure 7 Wiring Diagram glass door model 40 TMEF650 SKOPE Single Door Economy Freezer WIRING DIAGRAM 6 1 Model TMEF650 5 3 NARREN Part Description Mains Supply Flex Refrigeration Unit Control Box Assembly Probe Connector Block Ambient Probe Defrost Probe RFI Supp n Capacitor 7 Way Terminal Block CAREL Module Module Supply Cable CAREL Processor Latching Relay Pressure Switch ENSTO Receptacle Condenser Fan Motor Evaporator Fan Motor Defrost Element Sump Element Thermal Cutout Electrics Board Start Relay Start Capacitor black body Run Capacitor silver body Terminal Block TMEF650 Parts Description Compressor SC18CL Drain Tube Heater Sign Unit Assembly 20 Watt Fluorescent Tube 20 Watt Ballast Starter Fused Terminal Block Control Panel 3 0 Amp Fuse 60 Watt Ballast Side Light Assembly 58 Watt Fluorescent Tube Heated Door Assembly 85 W Glass Unit Element 70 W Door Frame Element 60 W Cabinet Element 4 Way Connector Block Cabinet Assembly 41 Top Mounted Economy Freezer 7 SPARES 7 1 Cabinet Assembly Part Description SKOPE Part Number INTERIOR SIDE LIGHT Glass Door Only Side Light Assembly R H V5060 670R 32 58 Watt Fluorescent Tube ELL6267 Fluorescent Tube Shield PLM6268 Side Light Diffuser V5060 E71 58 65 Watt Ballast ELZ8103 Starter ELZ2840
4. Lamp Holder ELZ6270 Lamp amp Starter Holder ELZ6271 CABINET Plain Facia Panel E6300 E39 32 Control Panel Cover E6300 R31 32 Shallow Shelf WRKV6000 583 32 Shelf Bracket V0973 99 Swivel Castor SXX8488 42 TMEF650 SKOPE Single Door Economy Freezer 7 SPARES 7 1 Door Part Description GLASS DOOR Glass Door Assembly R H Glass Door Assembly L H Glass Door Gasket Top Hinge Assembly R H Top Hinge Assembly L H Bottom Hinge R H Bottom Hinge L H SOLID DOOR Solid Door Assembly R H Solid Door Gasket Door Hinge Mechanism Top Hinge Assembly R H Stepped Bottom Hinge R H TMEF650 SKOPE Part Number V6325 D01R V6325 D01L GKT4775 V5301 388 V5301 389 V5000 393 32 V5000 394 32 V6500 D40 02 32 GKT4888 HIN5780 V7301 388 V5000 D55R 32 Top Mounted Economy Freezer 43 7 SPARES 7 1 Refrigeration Unit Part Description Refrigeration Unit Assembly Foamed Evaporator Box Foamed Evaporator Box Lid SKOPE Part Number E6358R 130X L6300 221 S2 L6300 225 S2 Compressor WJ3ILZ CPR7954P Evaporator Coil Assembly E6358 502 Evaporator Coil CLS8839 Condenser Coil CLS8841 Dryer DRY8783 Pressure Switch ELS7058 Unit Base L6300 210 32 Discharge Line E6358 255 Condenser Motor L6300 404 Evaporator Motors 2 per ELM9020 Thermal Mass V6301 784 32 Sump Element 2 Terminals ELT1133 ELE8850 Defrost Elements 2 per 2 Terminals ELE8851 ELT1133 Sight Glass REF7622 Control Box Assembly E6
5. Locating Noteri Bow L Washer 2 Solid Door Hinge Bracket o Bottom Hinge Screw Figure 6 Solid Door Hinge Mechanism TMEF650 31 Top Mounted Economy Freezer 5 SERVICE INSTRUCTIONS 5 5 Refrigeration Unit SKOPE Cyclone Unit Removal Disconnect power supply from unit Remove ventilated plain facia panel Remove unit sign side panels Remove controller from holder Remove cabinet electrical cover Unplug cabinet power ENSTO plug Remove screws from front ENSTO plug box Remove locating screws from either side of unit and under ENSTO plug Place lifting hooks under unit support arms as close to evaporator box as possible 10 Remove unit from cabinet Roc ED np ay Caution Refrigeration unit weights approximately 68kg Ensure all hazards are allowed for when removing unit Defrost over temperature cut out A defrost over temperature cut out is fitted inside the evaporator box It is a safety feature to turn off the elements at 55 C if they lock on The switch is wired in series with the elements Condenser Fan Motor Replacement 1 Disconnect motor flex from control box 2 Undo three screws from motor mounting bracket and remove complete assembly 3 Remove securing cable ties if necessary 32 TMEF650 SKOPE Single Door Economy Freezer 5 SERVICE INSTRUCTIONS Evaporator Fan Motor Replacement 1 2 3 4 Remove evaporator box lid Undo
6. alarm override after Continuous Refrigeration Mode DEFROST PARAMETERS Type of defrost Time interval between defrosts do 00 Electric di 06 6 hours dt 12 12 dP 22 22 mins d4 00 No d5 00 No d6 01 dd 03 d8 01 d9 00 No d dC 00 hrs mins Defrost termination temperature Maximum defrost time Defrost at cabinet plug in Defrost delay at cabinet plug in Lock in temperature display during defrost Defrost drip time before compressor and evaporator fan start Continuation of d6 at defrost end until setpoint or d8 elapses Compressor protection times observed at defrost c1 c2 c3 MO N Wee DO ON aw RD Evaporator temperature via defrost probe is displayed Time basis for parameter dl and dp Table 1 CAREL Controller Parameters continued on next page 20 TMEF650 SKOPE Single Door Economy Freezer 4 ELECTRONIC CONTROLLER 4 4 Parameters SKOPE Parameters for CAREL Controller IR22POLBRO SETPOINT 21 C SKOPE Settings AO AL AH AD A4 AS AG AT FO F1 F2 F3 Fd HO H1 H2 H3 1 0 10 09 60 01 00 99 00 02 14 0 00 01 01 00 00 00 00 1 0 C 32 C 31 C AE He 60 minutes ON 99 minutes ON 8 C 7 C No Yes 1 minute Warning The above parameters are set exclusively for the SKOPE TMEF650 freezer program with its dedicated CAREL controller Any alterations from this program may adversely effect the SKOPE freez
7. displayed Indicates a faulty cabinet ambient probe The controller switches to parameter c4 where the compressor will cycle with run intervals of c4 time followed by 15 minutes off No defrost is possible The alarm is on LO flashing Indicates low temperature alarm The cabinet has reached 32 C parameter AL 710 The alarm is overridden when temperature returns above 31 C parameter AO 1 HI flashing Indicates high temperature alarm The alarm is overridden when the temperature returns below 12 Check parameters AH 9 1 Ad 30 22 TMEF650 SKOPE Single Door Economy Freezer 4 ELECTRONIC CONTROLLER IA flashing e Refrigeration unit over pressure alarm The refrigeration unit has tripped on its auto reset high pressure switch Once a trip has occurred a latching relay maintains alarm status Check and if necessary clean condenser coil Check condenser fan operation which should permanently run from system power up The compressor will continue to cycle on and off while the high pressure fault exists The compressor s controlled cycle is to parameter A6 where the compressor will cycle with run intervals of A6 time followed by 15 minutes off The alarm is ONLY overridden by unplugging and re plugging cabinet into power supply Ed flashing Defrost has terminated on maximum defrost time function dP Confirm dt dP and d4 parameters are to SKOPE sp
8. reason and correct Check current replace protector Determine reason and replace Check condenser check ventilation check for restrictions in refrigeration system Check for possibility of misapplication Check refrigerant charge fix leak add if necessary Check return vapour temperature and suction superheat Replace compressor 5 Unit runs OK but short cycles Overload protector Thermostat requires adjustment or incorrectly positioned Incorrect refrigerant charge See section 4 above Adjust or relocate thermostat Adjust refrigerant charge 6 Unit operates long or continuously Unsatisfactory cabinet temperature Table 4 TMEF650 Short of refrigerant Overcharge of refrigerant Thermostat not cooling correctly Freezer has excessive load Evaporator coil iced Fix leak and add charge Remove refrigerant to correct charge Adjust thermostat clockwise colder and check thermostat bulb location If necessary replace thermostat Establish load within limits Defrost evaporator check refrigeration Check thermostat Check door closing seals etc Trouble Shooting Chart continued on next page 37 Top Mounted Economy Freezer 5 SERVICE INSTRUCTIONS 5 7 Trouble Shooting Complaint T continued Unit operates long or continuously Unsatisfactory cabinet temperature Possible Cause Restriction in refrigeration system Dirty conden
9. 358 E50X RFI Suppression Capacitor ELC8068 OMRON Relay ELR6183 3 0 Amp Ceramic Fuse ELZ6467 CAREL Controller programmed V5338 939 CAREL 4 Relay Module ELZ9308 Module Supply Cable ELZ7643 Probe Assembly L6300 E49 44 TMEF650 SKOPE Single Door Economy Freezer 8 NOTES 8 1 Notes TMEF650 Top Mounted Economy Freezer 45
10. C displays To turn Keypad on 1 Follow Access Entry above until the first parameter C is displayed 2 Press def down two times until H2 is displayed 3 Press SEL to display the value of the parameter 4 Press aux up to increase or def down to decrease until 01 is displayed 5 Press SEL to accept the value 6 Press PRG to lock in new value and to exit program TMEF650 Top Mounted Economy Freezer 17 4 ELECTRONIC CONTROLLER Setpoint Factory setting Maximum Minimum To adjust Setpoint With K eypad on 1 Press SEL key for 1 second and the Setpoint will be displayed On releasing the key the display will flash 2 To alter the Setpoint press aux up or def down 3 Press SEL to lock in the value and return to cabinet temperature Manual Defrost with Keypad on Press def down key for more than 5 seconds to manually initiate a defrost Continuous Refrigeration with Keypad on Press aux up and def down together down key first to initiate a Continuous Refrigeration mode The compressor will run without interruption to the parameter cc 6 hours SKOPE programme Its purpose is to achieve a fast product pull down Display Function During run mode the display shows the value measured by the Cabinet Ambient Probe In alarm status the display indicates the relative alarm code Buzzer Off Press mute key to silence the buzzer The alarm di
11. ICATIONS 1 1 Features Ventilated plain facia panel Triple glazed heated swing door Interior side light Front mounted condenser Adjustable wire shelves CAREL controller OR Figure 1 Glass Door Model Solid swing door with recessed handle Swivel castors Ty 55 Figure 2 Solid Door Model TMEF650 7 Top Mounted Economy Freezer 1 SPECIFICATIONS 1 2 Cabinet and Refrigeration Unit CABINET CONSTRUCTION Exterior Interior White powdercoat on galvanised steel Insulation 50mm thick polyurethane foam Cyclo iso Pentane blowing agent C5Hj9 CsH 9 DIMENSIONS Height 2195mm Width 740mm Depth 700mm Floor area 0 52m Internal volume 610 litres REFRIGERATION Top mounted SKOPE Cyclone refrigeration unit Nominal capacity 690 Watts Compressor Danfoss SC18CL Refrigerant R404A Charge 550 grams ELECTRICAL 230 240 Volts a c 50 Hz single phase power supply Run Amps 7 2 Amps LIGHTING Interior side light 58 Watt 5ft fluorescent tube glass door model DOORS Self closing aluminium framed triple glazed heated toughened safety glass or self closing foam filled galvanised steel solid door SHELVES White powdercoated adjustable height steel wire shelves 8 TMEF650 SKOPE Single Door Economy Freezer 2 INSTALLATION 2 1 Introduction The new TMEF650 freezer is designed to better integrate the instal lation of the SKOPE chiller and freezer produc
12. Operating and Service Manual 9515 Rev 2 1 Mar 2004 edition Vertical Display and Storage TMEF650 SKOPE Single Door Economy Freezer CONTACT ADDRESSES SKOPE Industries Limited TMEF650 Designed and Manufactured by New Zealand SKOPE INDUSTRIES LIMITED PO Box 1091 Christchurch New Zealand Freephone 0800 947 5673 Fax 03 983 3896 E mail enquiry skope co nz 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 1800 121 533 E mail enquiry skope co nz Website www skope com au SKOPE Single Door Economy Freezer TMEF650 Operating and Service Manual MAN9515 Rev 2 1 Mar 2004 edition Published by SKOPE Industries Limited Christchurch New Zealand Copyright 2002 by 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 TMEF650 SKOPE Single Door Economy Freezer TABLE OF CONTENTS 1 SPECIFICATIONS et dave AN acc ga A e aos 7 1 2 Cabinet and Refrigeration Unit 8 2 INSTALLATION 2 1 Introductlon etr e Re rii CR 9 2 2 Positioning of Machine 9 2 3 Ventilation sr DD dr D Ro Ra T Re be 10 3 OPERATION 3 1 5
13. cedure and return to run mode If EE returns after the reset procedure press def down until EE disappears If it will not clear the controller is defective Possible Causes of Controller Failure High humidity over 8596 R H Excessive vibration or shock Exposure to moisture Exposure to corrosive or pollutant gases Strong magnetic and or radio interference Exposure to direct sunlight or weather 24 TMEF650 SKOPE Single Door Economy Freezer 4 ELECTRONIC CONTROLLER 4 6 Replacement Microprocessor Removal 1 2 3 Disconnect machine from power supply Loosen screws on top of sign sides Remove ventilated plain facia panel by sliding vertically up 30 40mm to clear mounting lugs Manoeuvre it into a position which allows ready access to the screw terminals at the top rear of the microprocessor Draw microprocessor out from the mounting clip Disconnect the microprocessor cables A small screwdriver is required Microprocessor Installation NOTE Take care to avoid scratching visible surfaces of the cabinet 1 2 Insert rear of microprocessor into the mounting clip With machine disconnected from power supply push flat black connector cable into receptacle at rear of microprocessor until it latches into place Connect 4 coloured cables into screw connectors using a small electrical screwdriver see Table 2 below for terminal connection Mount ventilated plain facia panel i
14. cycle Initiation by either At 6 hourly intervals after being plugged in A manual defrost will occur if the Defrost button on the controller is held down for 5 seconds if keypad is enabled Note Defrost will NOT occur if the evaporator temperature is above 5 C Defrost Initiation Compressor OFF Evaporator fan OFF Defrost elements ON Defrost Termination Defrost termination is achieved when defrost probe reaches 12 or after 22 minutes whichever occurs first Defrost elements off A drip time of 3 minutes then compressor and evaporator fan delay of 1 minute Refrigeration run cycle begins TMEF650 1 3 Top Mounted Economy Freezer 3 OPERATION 3 3 Loading Shelves may be positioned at different heights to suit various prod ucts Always ensure that the shelf clips are securely engaged in each of the four shelf support strips Support strips are marked for easy location of shelf clips For even cooling and efficient operation allow air space around packages etc Do not allow products to overhang the front of the shelf as this could prevent the door from shutting or cause glass breakage Leave an airspace of at least 75mm 3 above packages etc on the top shelf Warning Product MUST NOT be stored on floor of cabinet 3 4 Cleaning When necessary wash both interior and exterior of cabinet with soapy water Exterior of cabinet may be waxed with automobile polish for extra
15. ecification Possible causes of Ed alarm e High cabinet usage high humidity causing excessive ice build up Change dl parameter from 6 to 4 if necessary Defrost failure If one or more of the defrost elements have failed check element connections and cables Check element resistance Coil element 220 approx Sump element 180 approx Cyclone unit defrost Amps 4 8 Amps approx 240V Refrigeration unit defrost Amps is rated at 240 Volts and includes condenser fan motor but not cabinet which must be unplugged at cabinet ENSTO connection on control box to test TMEF650 Top Mounted Economy Freezer 23 4 ELECTRONIC CONTROLLER Faulty defrost probe When this has occurred El and Ed blinks If a faulty defrost probe occurs the controller will only terminate the defrost cycle on time see El fault on previous page df flashing Toindicate defrost in progress if parameter d6 0 If programmed to SKOPE settings d6 1 EA EB or EE displayed Data acquisition failure Reset procedure must be performed Reset Procedure Performed by unplugging the cabinet then press PRG key keeping it pressed while plugging in the cabinet The display will then show C After a few seconds access is gained to the parameters which will have reverted to the default settings therefore the control ler must be re programmed to the SKOPE settings After modifying the parameters press PRG key to exit the pro
16. ef PARAMETER PA 22 C 00 199 22 Password PROBE PARAM ETERS 0 NTC probe Type of probe used NTC Available after Reset Procedure IC 2 C Calibration offset for cabinet temperature display 0 1 C 2 Probe reading stability lower the number faster the response 8 Probe reading speed lower the number slower the response 14 Designation as controlling probe 5 C Units of temperature measurement 6 Decimal point display CYCLE PARAM ETERS rd d 5 Refrigeration differential ri Minimum allowable set point r2 Maximum allowable set point r3 Enabling of ED alarm defrost interrupted because maximum duration has been reached parameter dP O No 1 Yes r4 T Automatic Set point variation during night functioning That is when the curtain switch is closed with either A4 or A527 r5 Enabling of minimum maximum temperature monitoring rt Actual interval in maximum minimum temperature reading rH Maximum temperature reading in the rt interval rL Minimum temperature reading in the rt interval COM PRESSOR PARAM ETERS 1 min Compressor and evaporator fan start delay at power on c1 03 3 mins c2 03 3 mins c3 00 0 c4 99 99 mins cc 04 4 hours c6 02 2 hours Minimum time between compressor starts Minimum compressor OFF time Minimum compressor ON time Comp backup for Ambient probe failure On for c4 off for 15 min Duration of Continuous Refrigeration Mode Duration of
17. er operation Type Min Max Def PARAM ETER ALARM PARAMETERS Alarm and fan differential Low temp alarm On Setpoint AL A0 Off Setpoint AL High temp alarm On Setpoint AH A0 Off Setpoint AH Alarm delay time Immediate external alarm i e High pressure switch trip Not used must be 0 Compressor run lock time due to A4 function Compressor will still cycle with HP switch Not used must be 0 FAN PARAM ETERS Evap fan control type controlled by Evap Defrost Probe Evaporator fan start temperature On Setpoint F1 0 Off Setpoint F 1 Fans off while compressor is off Fans off during defrost Fan delay after defrost OTHER SELECTIONS Serial address Not used Must be 0 Enable keypad and remote control Must be 01 to enable Password for remote control For full specifications a detailed CAREL controller manual is available TMEF650 Table 1 CAREL Controller Parameters continued 21 Top Mounted Economy Freezer 4 ELECTRONIC CONTROLLER 4 5 Alarms and Signals A flashing LED indicates a time delay on the indicated function The following is a list of the LED displays flashing Indicates faulty defrost probe The defrost cycle will only terminate on maximum defrost time d4 The evaporator fan will start immediately after its time delay dd Fd c0 The refrigeration cycle will continue as normal The alarm buzzer does not sound EO
18. f the gasket rolling Should the gasket be out of shape when in place use hot air i e from hair drier to realign Glass Door Removal Disconnect cabinet from power supply Slacken off door tension and remove pin Disconnect door wiring from terminals Unscrew top hinge and lift door clear of bottom pivot Glass Door Repair To repair torsion bar assembly turn door upside down and pull out old torsion bar Angle torsion bar to clear the hook at end Replace parts as required and refit Reconnect door wiring to terminals NOTE Glass replacement is not considered economical as the glass is fixed to the frame for integral strength Door replacement is recommended Glass Door Tension The door tension can be adjusted by rotating the capstan mounted in the bottom hinge bracket To achieve this the split pin must firstly be removed Using two 2 5mm diameter steel rods the capstan can be rotated to provide the required tension At this point the split pin can be re inserted to lock torsion position 30 TMEF650 SKOPE Single Door Economy Freezer 5 SERVICE INSTRUCTIONS Solid Door Removal Unscrew door bottom hinge bracket and slide door down to remove from top hinge Solid Door Tension The solid door hinge mechanism has a preset tension and is non adjustable Ensure that the square notch in the hinge bracket mates correctly with the door hinge mechanism when replacing Solid Door Hinge Mechanism Square Spring Stop
19. id lines do NOT crimp Compressor Electrics Capacitors and relay are located inside the unit s electrical box 34 TMEF650 SKOPE Single Door Economy Freezer 5 SERVICE INSTRUCTIONS 5 6 Pressure Temperature Chart TEM PERATURE F Table 3 Pressure Temperature Chart TMEF650 Top Mounted Economy Freezer 35 5 SERVICE INSTRUCTIONS 5 7 Trouble Shooting Complaint 1 Compressor will not start no hum Possible Cause Fuse removed or blown No power Overload protector tripped Thermostat stuck in open position Thermostat off due to cold location Wiring improper or loose Repair Replace fuse Check reason Refer to electrical section Repair or replace control Relocate control Check wiring against diagram 2 Compressor will not start hums but trips on overload protector Improperly wired Low voltage to unit Start capacitor defective on CSIR or CSR motor Run capacitor defective on PSC motor Relay failing to close Compressor motor has a winding open or shorted Internal mechanical trouble in com pressor Check wiring against diagram Determine reason and correct Determine reason and replace Determine reason and replace Determine reason and correct Replace if necessary Check resistance values Replace compressor if neces sary Replace compressor 3 Compressor starts but does not switch off sta
20. n position on refrigerator Ensure microprocessor cables are out of sight and clear of moving parts Cable Colour Screw Connection Orange Terminal 6 Blue Terminal 7 Table 2 CAREL Controller Terminal Brown Terminal 8 White Terminal 9 Connection TMEF650 25 Top Mounted Economy Freezer 5 SERVICE INSTRUCTIONS 5 1 System Service Notes R404A Refrigerant The refrigeration system utilises R404A refrigerant which is a near azeotropic blend refrigerant The compressor uses a Polyolester POE oil There are special service handling requirements Dedi cated HFC equipment must be used HFC refrigerant gauges HFC vacuum pump with POE oil R404A pressure temperature chart HFC compatible driers HFC leak detector soap bubbles may be adequate With HFC R404A being a blend refrigerant component separation is possible in the gas state Therefore the system must be liquid charged The liquid refrigerant should be very slowly charged into the compressor service valve which is cracked off the back seat by only 1 4 of a turn R404A is a relatively stable blend Generally a partial loss of system refrigerant should not effect the composition of the remaining refrigerant to the point of effecting system performance if this refrigerant is recycled POE Oil The POE oil is highly hygroscopic and therefore the compressor cannot be open to the atmosphere for longer than 15 minutes with out moisture contamination of the
21. of others ensure this is done Ifthe refrigeration unit is required to be installed or removed from the cabinet ensure all necessary safety precautions are observed TMEF650 1 1 Top Mounted Economy Freezer 3 OPERATION 3 2 Operation of Machine The operation of this machine is controlled by pre programmed Microprocessor Controller Lights Lights run continuously as standard when plugged into SKOPE Cyclone unit The option of a switch exists Condenser Fan Condenser fan runs continuously Refrigeration Run Cycle Initiated by the controller when Cabinet Ambient Probe Tempera ture is warmer than the setpoint plus the differential temperature e g setpoint 21 C differential 3 C therefore refrigeration run initi ates at temperatures warmer than 18 C The compressor will start and run until setpoint temperature is reached except during defrost The compressor has a one minute time delay when cabinet is first plugged into power supply Evaporator fan will start after the Defrost Probe reaches 8 C and will remain running while the evaporator is below this temperature except during defrost Refrigeration Off Cycle Initiated by Controller when the Cabinet Ambient Probe reaches the setpoint e g 21 C Compressor shuts off 1 2 TMEF650 SKOPE Single Door Economy Freezer 3 Defrost Cycle Defrost Cycle will override the refrigeration
22. oil occurring The HFC drier must be replaced during every refrigerant service procedure 26 TMEF650 SKOPE Single Door Economy Freezer 5 SERVICE INSTRUCTIONS Sight Glass The Danfoss SGN sight glass s primary function is to indicate system moisture content The sight glass must always indicate dry refrigerant if this is not so the HFC drier must be replaced and the system evacuated before the compressor is damaged The sight glass will not necessarily indicate a correctly charged system but it will indicate a system that is low on refrigerant For a system to be low on refrigerant a leak has occurred which must be located Repairing a leak Once the leak is found and the remaining refrigerant is removed the compressor must be isolated to prevent moisture contaminating the compressor oil The method of isolation will vary depending on where the leak is and the time the system needs to be open Slowly purging the compres sor with dry nitrogen or front seating the compressor service valve and brazing the discharge line closed are two suggested methods The leak can then be repaired the drier replaced the system recon nected evacuated and charged Always charge using scales The freezer has no high side pressure port Generally it should not be required but if itis necessary to measure discharge pressure or for a quick evacuation a line tap valve can be connected to the liquid line process tube and later must be remo
23. on of the refrigeration unit is essential Air surrounding condenser must not exceed 30 Never store card board cartons or other items on top of the refrigeration unit Warning Adequate ventilation of the refrigeration unit is essential Ceiling 200 mm Airflow Wall Front of cabinet Figure 3 Ventilation 1 TMEF650 SKOPE Single Door Economy Freezer 3 3 1 Safety Information When using any electrical appliance basic safety precautions should always be observed READ THESE INSTRUCTIONS CAREFULLY Do not use this appliance for other than its intended use Warning Do NOT overload power supply Machine rated at 7 2 Amps 240 Volts Use this appliance only on the voltage specified on the rating plate or in these instructions Ensure ventilation of SKOPE refrigeration unit Condenser coil MUST be kept clean To ensure trouble free performance it is recommended that on a regular basis the unit be isolated from the power supply and a vacuum cleaner used to remove dust and fluff from the condenser very careful not to touch moving parts Do not cover the grilles or block the entry or exhaust of airflows Do not probe any opening Disconnect machine mains power supply before attempting to perform any electrical service or maintenance Regulations require that all electrical work be carried out only by authorised persons For your own safety and that
24. or Economy Freezer 5 SERVICE INSTRUCTIONS 5 3 Interior Side Light The fluorescent tube and starter are located inside the interior side light and may be replaced without removing shelves or product from the cabinet To replace the fluorescent tube and starter 1 Compress the back section of the diffuser so that it disengages from the aluminium housing and push the diffuser back to gain access to the light 2 The fluorescent tube and starter can now be removed Revolve the tube until the pin position allows withdrawal 3 Replace the tube and starter as necessary see page 42 for spares 4 When refitting the diffuser engage back section into the side light housing and compress and snap front section of diffuser back into place working progressively down the full length of light COMPRESS Tube Holder Diffuser Starter 4 Fluorescent Tube PUSH Figure 5 Interior Side Light TMEF650 29 Top Mounted Economy Freezer 5 SERVICE INSTRUCTIONS 5 4 Doors Door Alignment This can be achieved by releasing the bottom hinge fixing bracket The bracket is provided with slots allowing alignment adjustment Door Gasket Replacement The door gaskets simply clip into the door frame extrusion and may be removed for repair or replacement simply by peeling from frame starting at corner New gaskets when fitted may be lightly lubricat ed with a clear silicone grease or similar compound This will lessen the possibility o
25. protection The condenser coil must be kept clean for efficient and reliable oper ation The machine must be disconnected from the mains supply before cleaning the condenser Warning Condenser coil MUST be kept clean for efficient and reliable operation Clean with a brush and vacuum cleaner regularly 1 4 TMEF650 SKOPE Single Door Economy Freezer 4 ELECTRONIC CONTROLLER 4 1 Controller Display Figure 4 Controller Display Silences alarm buzzer Allows entry to frequent parameters section if pressed for 5 seconds Allows entry to configuration parameters section if pressed simultaneously with SEL for 5 seconds Locks in new parameters and exits parameter sections Activates reset procedure Displays setpoint in run mode Displays selected parameter in parameter mode Allows entry to configuration parameters section if pressed simultaneously with PRG for 5 seconds Adjustment locked out Alters parameters in parameter mode Activates and deactivates continuous refrigeration mode with def key Adjustment locked out Activates manual defrost cycle Alters parameters in parameter mode Activates and deactivates continuous refrigeration mode with aux key TMEF650 Unused Decimal point indicator Defrost cycle on indicator Evaporator fan on indicator Continuous refrigeration mode on indicator fast freeze Compressor on indicator Remote controller indicator 15
26. rts winding 36 Table 4 Improperly wired Low voltage to unit Relay failing to open due to welded contacts or relay incorrectly mounted Run capacitor defective on CSR motor Excessively high discharge pressure Compressor motor has winding open or shorted Check continuity and resistance Internal mechanical trouble in com pressor tight May be lubrication Check wiring against diagram Determine reason and correct Determine reason and correct Replace if necessary Determine reason and replace Clean condenser Check power input Watts Possible overcharge insufficient con denser cooling or non con densible gasses Replace compressor if faulty Replace compressor Trouble Shooting Chart continued on next page TMEF650 SKOPE Single Door Economy Freezer 5 SERVICE INSTRUCTIONS 5 7 Trouble Shooting Complaint 4 Compressor starts and runs but short cycles on overload protector relay may chatter on RSIR CSIR and CSR motors Possible Cause Additional current passing through overload protector Low voltage to unit Overload protector defective Run capacitor defective on CSR motor Excessive discharge pressure Suction pressure too high Compressor too hot insufficient suction gas cooling Compressor motor has a winding shorted Repair Check wiring diagram Check for added fan motors etc connected to wrong side of protector Determine
27. screws from motor mounting bracket and remove complete assembly Reseal the flex hole in the evaporator box carefully on replacement Ensure motor bracket is replaced in correct position Probe Fault 1 If a faulty probe is signalled remove the evaporator box lid control box cover and securing cable ties Check the cable and its terminations Check probe resistance in ice water resistance should be 27k ohms at 0 Replace probe if necessary Ensure sensor is fitted in the original position and re assemble unit Defrost Elements e e 2 x Evaporator coil defrost elements 1 x Drain Sump defrost element TMEF650 Top Mounted Economy Freezer 33 5 SERVICE INSTRUCTIONS Replacing Elements The elements in the evaporator cannot be replaced without removal of the refrigerant and opening the lines This work should only be carried out by qualified servicemen wear ing safety glasses and safety gloves Disconnect unit from power supply Remove refrigerant Disconnect suction and liguid lines Remove top cover on unit and evaporator box cover Remove element leads from electrical connections inside terminal box Remove evaporator fan assembly from unit 7 Remove all evaporator fixing screws and lift evaporator assembly up 8 Remove faulty element and replace 9 Re assemble evaporator assembly 10 Check for leaks 11 Recharge with scales pU EA e Warning Ensure that suction and liqu
28. ser Inadequate air circulation Compressor not pumping efficiently Filter dirty if applicable Faulty fan motor Repair Determine location and clear restriction Flush with dry nitrogen Replace component if blockage will not clear Clean condenser Advise client how to regularly clean condenser Internal Improve air movement alloe airflow around stock External Remove any restrictions to condensing ventilation Replace compressor Clean or replace Check rotation Replace if necessary 8 Start capacitor open shorted or blown Relay contact not opening properly Prolonged operation on start cycle due to Low voltage to unit b Improper relay Excessive short cycling Improper capacitor Clean contacts or replace relay if necessary Determine reason and correct b Replace relay Determine reason for short cycling see 5 above and correct Determine correct size and replace 9 Relay defective or burned out Incorrect relay Line voltage too high or too low Excessive short cycling Relay being influenced by loose vibrating mount Check and replace Determine reason and correct Determine reason see 5 above and correct Remount rigidly Table 4 Trouble Shooting Chart continued on next page 38 TMEF650 SKOPE Single Door Economy Freezer 5 SERVICE INSTRUCTIONS 5 7 Trouble Shooting Table 4 Trouble Shooting
29. splay remains while the alarm condition exists 1 8 TMEF650 SKOPE Single Door Economy Freezer 4 ELECTRONIC CONTROLLER 4 4 Parameters Frequent Parameters F withKeypad on No password is required to enter this section 1 Press PRG key for more than 5 seconds to enter this parameter section 2 Press aux up or def down to scroll through the parameters Configuration Parameters C A password is required to enter 1 Press PRG and SEL simultaneously for more than 5 seconds 00 is displayed 2 Press aux up or def down until 22 is displayed 3 Press SEL to confirm The first modifiable parameter code is displayed Parameter Modification 1 Press aux up or def down to show the code of the parameter that has to be changed 2 Press SEL to display the selected parameter value Press aux up or def down to increase or decrease the value 4 Press SEL to temporarily confirm the new value and display its code 5 Repeat above procedures to alter further parameters 6 Press PRG to lock in the new parameters and exit parameter modification procedure Note For parameters A6 and c4 If parameter 0 the compressor would not run at all If parameter 100 the compressor would run continuously w TMEF650 19 Top Mounted Economy Freezer 4 ELECTRONIC CONTROLLER 4 4 Parameters SKOPE Parameters for CAREL Controller IR22POLBRO SETPOINT 21 SKOPE Settings Type Min Max D
30. ts while also provid ing a more cost effective alternative to the existing range of SKOPE CLF SKF freezers New features of the TMEF650 freezer include Front mounted condenser 5 foot interior side light The ability to be pushed hard back against the wall Quieter running 10 Amp plug 2 2 Positioning of Machine The mains flex exits out the top of the refrigeration unit The flex should be retrieved before the machine is positioned when walls and partitions may make access difficult For efficient operation of machine it is essential that adequate venti lation be provided above the refrigeration unit When positioning the machine a gap must be left between the top of the refrigeration unit and ceiling of at least 200mm Maximum recommended operating ambient temperature for the machine is 25 When siting the machine avoid direct sunlight warm draughts etc and adequate allowance should be made for door opening The door has an internal torsion bar which is pretensioned at the factory The machine must be positioned on a level surface for the door to shut and seal correctly and to prevent the condensate tray from over flowing Remove all packaging material from the shelves Fit shelf support brackets at the desired heights and relocate shelves TMEF650 9 Top Mounted Economy Freezer 2 INSTALLATION 2 3 Ventilation Even though the machine can be positioned hard against a back wall adequate ventilati
31. ved Vapour must not be vented off the charging cylinder To fully charge the cylinder it should be evacuated and chilled TMEF650 Top Mounted Economy Freezer 27 5 SERVICE INSTRUCTIONS 5 2 Pre Service Check Information Check setpoint by pressing SEL key SKOPE setting 21 C e Check the airflow is not restricted by product blocking either discharge or return air ports Ensure that no product is stored below the bottom shelf Check refrigeration unit is sealing properly to top of cabinet i e unit fixing screws secured down firmly enough to ensure no leaks Check evaporator box lid is securely fastened and is sealing properly During and after defrost the display locks onto the last displayed temperature until the system attains setpoint or after 60 minutes the real temperature is shown again Check that system pressures are within normal ranges for the ambient conditions and cabinet temperatures Possible reasons for low pressure readings Low refrigeration load Gas leak s Restricted expansion valve Frozen evaporator coil Possible causes of frozen evaporator coil Evaporator fan failure Defrost failure Gasleak If an electronic controlled unit is taken back to a workshop for repairs it should be noted that in order to run the unit you will either need to fit the original microprocessor supplied with cabinet or have a spare programmed microprocessor 28 TMEF650 SKOPE Single Do
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