General-Purpose Undercounter Laboratory Refrigerator User Manual
Contents
1. is started and then turned jp off when the temperature reaches the off mM ime set point value again In case of fault in the thermostat probe the start and stop of the compressor are timed through parameters Cy and Defrost Defrost is performed through a simple stop of the compressor Parameter id controls the interval between defrost cycles while its length is controlled by parameter Md Front Panel Commands To display target set point in programming mode it selects a parameter or confirms an operation SET Ax To start a manual defrost 0 In programming mode it browses the parameter codes or increases the displayed In programming mode it browses the parameter codes or decreases the displayed value q AUX Keys combination NZ AN Tolock or unlock the keyboard SET A To enter in programming mode SET N7 To return to room temperature display LED MODE SIGNIFICANCE On Compressor enabled ax Flashing a Anti short cycle delay enabled AC parameter On Defrost in progress 664 Flashing Dripping in progress On Measurement unit Flashing Programming mode On Measurement unit F Flashing Programming mode How to see the set point 1 Push and immediately release the SET key the set point will be showed 2 Push and immediately release the SET key or wait about 5s to return to normal visualisation2. Door gasket replacement rnnrnrrarrnrvnrvanvarvanvnnvanesnrenrenvevnsvarvnsvesvasvasvesvesvesvesvssnsee 5 84 Winne HE ed VEHI 5 8 5 Controller Operations s sioe hh aul eie eret cata 6 8 6 Troubleshooting bao eere ede dte e aeter 9 8 7 Replacement paris et ecd oe pop Reo i ee b i Ren 12 9 Warranty Statement eesessessveseensenvenveneeneennennennennenneenessessesnsennennennensensensensensenseeneeneen 13 MR05 Undercounter Laboratory Refrigerators Safety Precautions 1 Safety Precautions In this manual and on labels attached to this product the words WARNING and CAUTION mean the following SYMBOL SIGNAL MEANING WARNING Indicates an imminently hazardous situation which if not avoided could result in death or serious injury CAUTION Indicates an imminently hazardous situation which if not avoided may result A in minor or moderate injury WARNING Indicates hazards associated with the use of electrical energy wherein if precautions are not taken can cause injury or death Before installing using or maintaining this product please be sure to read this manual and product warning labels carefully Failure to follow these instructions may cause this product to malfunction which could result in injury or damage The following important safety precautions apply to this product e Use this product only in the way described in the product literature and in this manual Before usi
3. The cabinet will pass through a standard 30 door opening 2 Move the cabinet into the desired location Make sure the bottom of the cabinet is evenly supported Thin shims under the points of rest can be used to equalize the distribution of weight If the cabinet sets on an uneven floor a slight rocking or vibration might result when the condensing unit is set in operation 3 Make certain the cabinet is located so the front grill is unobstructed 4 The unit is shipped in ready to operate condition Adjustment of operating temperatures or setpoint is not necessary and may adversely effect unit performance 5 Use of electrical supply other than that specified on the serial plate will cause permanent damage to the product 6 Operate the unit for several hours to allow the cabinet to reach normal operating temperatures before storing product 1 The cabinet interior should be cleaned frequently Any spilled liquid should be wiped off immediately A mild detergent and lukewarm water or a solution of bicarbonate of soda 1 tablespoon per gallon of water is recommended for cleaning the interior and exterior of the cabinet All surfaces should be rinsed and thoroughly dried 2 Shelves and or drawers should be removed from the cabinet and thoroughly scrubbed Clean door gasket periodically with water 3 The unit cooler fan operates continuously when the door is closed and requires no lubrication These models require no manual
4. Run capacitor failure or wrong 5 Replace capacitor run capacitor 6 Motor electrical trouble 6 Check motor for open BULL MM Short circuit or burn out 7 Improper wiring causing additional 7 Check wiring diagram Check for added fan current to pass through overload motors heaters etc connected to wrong side of protector protector Compressor 1 Differential set too close 1 Widen differential starts and runs 7 High discharge pressure 2 See high discharge pressure symptom but short cycles on temperature 3 Low discharge pressure 3 See low discharge pressure symptom or pressure controls Compressor runs 1 Shortage of refrigerant 1 Leak check and repair long or 2 Control contacts stuck or frozen 2 Clean contacts or replace control continuously 3 Refrigerated air space has an excessive 3 Determine reason and correct load 4 4 Dirty Condenser Condenser 4 4 Clean condenser condenser 5 Evaporator Baer iced a and check defrost circuit 6 Restriction in refrigeration system 6 Determine location and remove Compressor nos dii 3 Replace compressor Figh Discharge S Dirty condenser Law discharge 3 Low suction pressure 3 See low suction pressure symptom 10 MR05 Undercounter Laboratory Refrigerators Service TROUBLESHOOTING SERVICE CHART SYMPTOM POSSIBLE CAUSE POSSIBLE CORRECTIVE STEP High suction 1 Excessive l
5. is closed LATCH STRIKE PLATE c MOUNTING SCREWS ug STRIKE D Be 1 Open the refrigerator door Place screw driver under the interior portion of the cover and gently pry the cover outward Pull out the hinge cover straight Close the refrigerator door 2 Loosen the three 3 screws B which hold adjusting plate in position 3 To tighten gasket seal place hand against exterior of door near hinges gently press in on door so gasket sits firmly against cabinet face Tighten screws B 4 After adjustment is complete if hinges are adjusted so gasket seal is too tight door will tend to spring open Door must be readjusted To test gasket seal insert a dollar bill or piece of paper of similar size between the gasket and the cabinet opening Close door a slight resistance to removal of the dollar bill test strip should be felt Check the perimeter of the door If the latch is loose see latch adjusting information 5 Replace cover plate A If replacing hinges make sure to reuse any shims furnished on the cabinet NOTE To accomplish different offsets shims are utilized 1 Latch A is fastened to door 2 For up or down adjustment proper latch engagement loosen mounting screws B 3 Strike plate C remains in position 4 Move strike D up or down as required and tighten screws when adjustment is satisfactory No play
6. termination temperature 50 50 C if ot Y it sets the temperature measured by the evaporator probe which causes the end of defrost id Interval between defrost cycles 0 99 ore Determines the time interval between the beginning of two defrost cycles Md Maximum length for defrost 0 99 min with 0 no defrost when ot n not evaporator probe timed defrost it sets the defrost duration when ot y defrost end based on temperature it sets the maximum length for defrost dF Display during defrost rt it St dF rt real temperature it start defrost temperature St SET POINT dF label dF Alarms AU Maximum temperature alarm AL 99 C when this temperature is reached the alarm is enabled after the Ad delay time AL Minimum temperature alarm 55 AU C when this temperature is reached the alarm is enabled after the Ad delay time MR05 Undercounter Laboratory Refrigerators Service Ad Temperature alarm delay 0 99 min time interval between Default Setting Values the detection of an alarm condition and alarm signalling LABEL DESCRIPTION RANGE PRESET LEVEL dA Exclusion of temperature alarm at startup 0 99 min time VALUE interval between the detection of the temperature alarm REGULATION condition after instrument power on and alarm signalling Set Point 2 C Hy Differe
7. will be present in the latch handle with the door closed 5 For in and out adjustment proper gasket seal loosen screw E Adjust in or out as required and tighten screw when adjustment is satisfactory 6 The stainless steel hex head cap screw is 10 32 X 5 16 long Use box wrench open end wrench or ratchet to tighten Do not use a nut driver or pliers to reuse any shims furnished on the cabinet NOTE If replacing latch and strike assembly make sure MR05 Undercounter Laboratory Refrigerators Service 8 3 Door gasket replacement Old or damaged door gaskets will allow warm air to enter the unit harming performance Door gaskets should be replaced if in bad condition GASKET DART MOUNTING TRACK 8 4 Wiring Diagram 120 60 2 1 B Y GY 2 w HOSPITAL GRADE PLUG NEMA 5 15P 3C 1 Remove existing gasket from mounting track on the door by gently pulling out from1 corner of the door 2 Clean the mounting track and verify that the mounting tracks is free of any remaining gasket material NOTE Do not clean track with chemical May damage material Place the new gasket on the door and align the dart on the gasket with the mounting track and press firmly 4 Open and close door check for proper gasket seal with a gasket seal test insert a dollar bill or piece of paper of similar size between the gasket and the cabinet ope
8. How to change the set point 1 Push the SET key for more than 2 seconds to change the Set point value 2 The value of the set point will be displayed and the C or F LED starts blinking 3 change the Set value push the o or n arrows within 10s 4 To memorise the new set point value push the SET key again or wait 10s How to change a parameter value To change the parameter s value operate as follows 1 Enter the Programming mode by pressing the SET keys for 3s C or F LED starts blinking 2 Select the required parameter Press the SET key to display its value 3 Use A or w to change its value 4 Press SET to store the new value and move to the following parameter To exit Press SET A or wait 15s without pressing a key NOTE the set value is stored even when the procedure is exited by waiting the time out to expire MR05 Undercounter Laboratory Refrigerators Service Hidden menu The hidden menu includes all the parameters of the instrument How to enter the hidden menu 1 Enter the Programming mode by pressing the SET 7 keys for 3s C or F LED starts blinking 2 Released the keys then push again the SET 7 keys for more than 7s The L2 label will be displayed immediately followed from the Hy parameter Now you are in the hidden menu Select the required parameter Press the SET key to display its value Use A or w to ch
9. R WARRANTIES WHETHER WRITTEN ORAL OR IMPLIED NO WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE SHALL APPLY COMPANY DOES NOT WARRANT THAT THE PRODUCTS ARE ERROR FREE OR WILL ACCOMPLISH ANY PARTICULAR RESULT COMPANY SHALL NOT BE LIABLE FOR ANY INDIRECT OR CONSEQUENTIAL DAMAGES INCLUDING WITHOUT LIMITATION DAMAGES TO LOST PROFITS OR LOSS OF PRODUCTS 13 Important For your future reference and when contacting the factory please have the following information readily available Model Number Serial Number Date Purchased The above information can be found on the dataplate attached to the equipment If available please provide the date purchased the source of purchase manufacturer or specific agent rep organization and purchase order number IF YOU NEED ASSISTANCE SALES DIVISION Phone 1 866 984 3766 LABORATORY PARTS and SERVICE Phone 1 800 438 4851 TECHNICAL SUPPORT Phone 1 800 438 4851 14
10. Thermo Scientific MRO5 Series Undercounter Laboratory Refrigerators Installation and Operation Manual GPR SERIES 324019H01 Rev A 9 Ez L N LL de ve s m je ot Table of Contents 1 Safety Precautions 1 PS M M 2 2 1 General specifications venn nte Gan ee tede vetere 2 2 2 Performance specifications ette ree e netten enne nts 2 2 3 Electrical neta reet ted Ped 2 2 4 Refrigeration specifications 2 2 3 Introduction 3 4 Inspection for Damage serenrerenvenvnsenenrensenensenvnseneenensnnensenensenennensenensenennenennensenenseneenene 3 5 Installation Instruction eesesenvenenreneerensenenrenennenennensenensenensenennensenensenseneneenenseneeseneensne 3 6 Operating Instructions esessvesvevevnvenseneeveensennennennennennennennennenneeneeneeneensensensensenennnneneenee 3 6 T Temperature Control au oen EAD RE RETE RR 3 6 2 DefroSting i iternm nee Ur PIER D petet edet bn ER 3 7 Maintenance Instructions sserenrenenreneenenrenenrenensenennsnsenensensnnenennensenensenenseneenensenenseneer 3 8 Service TT 4 8 1 HingeAdjustment POR ibe rp i o dens 4 8 2 Latch and Strike Adjustment sees 4 8 3
11. alibration 9 9 9 9 C allows to adjust possible offset of the first probe P2 Evaporator probe presence n not present y the defrost stops by temperature oE Second probe calibration 9 9 9 9 C allows to adjust possible offset of the second probe od Outputs activation delay at start up 0 99min This function is enabled at the initial start up of the instrument and inhibits any output activation for the period of time set in the parameter AC Anti short cycle delay 0 50 min minimum interval between the compressor stop and the following restart Cy Compressor ON time with faulty probe 0 99 min time during which the compressor is active in case of faulty thermostat probe With Cy 0 compressor is always OFF Cn Compressor OFF time with faulty probe 0 99 min time during which the compressor is OFF in case of faulty thermostat probe With Cn 0 compressor is always active Display CF Measurement unit C F C Celsius F Fahrenheit WARNING When the measurement unit is changed the SET point and the values of the parameters Hy LS US oE ol AU AL have to be checked and modified if necessary rE Resolution only for C dE in dE decimal between 9 9 and 9 9 C in integer Ld Default display P1 P2 P1 thermostat probe P2 evaporator probe SP Set point dy Display delay 0 15 min when the temperature increases the display is updated of 1 C 19F after this time Defrost dE Defrost
12. ange its value 9v e cR va Press SET to store the new value and move to the following parameter To exit Press SET A or wait 15s without pressing a key NOTE 1 if none parameter is present in 11 after 3s the nP message is displayed Keep the keys pushed till the L2 message is displayed NOTE 2 the set value is stored even when the procedure is exited by waiting the time out to expire How to move a parameter from the hidden menu to the first level and viceversa Each parameter present in the HIDDEN MENU can be removed or put into THE FIRST LEVEL user level by pressing SET w In HIDDEN MENU when a parameter is present in First Level the decimal point is on To lock the keyboard 1 Keep pressed for more than 3s the A and w keys 2 The OF message will be displayed and the keyboard will be locked If a key is pressed more than 3s the OF message will be displayed To unlock the keyboard Keep pressed together for more than 3s the and w keys till the on message will be displayed Parameters Regulation Hy Differential 0 1 C 25 C Intervention differential for set point Compressor Cut IN is SET POINT differential Hy Compressor Cut OUT is when the temperature reaches the set point LS Minimum Set Point 55 C SET 58 F SET Sets the minimum value for the set point US Maximum Set Point SET 99 C SET 99 F Set the maximum value for set point ot First probe c
13. defrosting The cooling coil automatically defrosts when the condensing unit is on the off cycle 4 The condensing unit needs no oil or other lubrication The finned condenser can become clogged with lint or dust The openings between the fins should be kept clean A vacuum cleaner or small test tube brush works well for this purpose This should be accomplished on an annual basis Failure to keep the condenser fins free of dirt and lint will hamper operation and may damage the refrigeration system 5 Annual inspection of the mechanical refrigeration equipment by a qualified service provider or factory direct technician is recommended 6 The refrigeration system is charged with refrigerant If the system is opened for any reason extreme care should be taken to prevent the entry of moisture bearing air A new drier should be installed in the lines when the system is closed 7 The condensate evaporator pan is located behind the compressor fan which is behind the base grill This pan should be cleaned at least once a year MR05 Undercounter Laboratory Refrigerators Service 8 Service 8 1 Hinge Adjustment Hinge adjustment may be necessary if the door does not align with the door gasket CABINET SHIM DOOR SHIM ADJUSTING PLATE C COVER PLATE SCREWS 8 2 Latch and Strike Adjustment Latch adjustment may be necessary if the door latch does not seat properly when the door
14. l specifications Model Series MROS Model Style Undercounter Capacity 5 4 cu ft 153 Liters Exterior Dimensions Height inches 34 5 8 Width inches 24 Depth inches 24 1 8 Cabinet Depth 2 2 Performance specifications Operating Temperature Range 2 C to 10 C Preset Temperature Setpoint 4 C 2 3 Electrical specifications Power Supply 115V 60Hz 1 phase Full load amperes 8 2A Minimum circuit Breaker Capacity 15 Amps 2 4 Refrigeration specifications Refrigerant R134a Charge quantity 6 oz 2 5 Environmental Operating Conditions Pollution Degree 2 Installation Category II Maximum Altitude 2000m Mean Sea Level Humidity 80 maximum non condensing Temperature 15 C to 32 C Product Usage Indoor use only MR05 Undercounter Laboratory Refrigerators Installation Operation and Maintenance 3 Introduction This manual provides installation operation and maintenance instructions for MRO5 General purpose laboratory refrigerator models The control system standard on all models includes e Preset temperature setpoint 4 C e Digital temperature display with 1 C resolution Other standard features include e Keyed door locks e CFC free refrigerant e CFC free foamed in place urethane insulation Quiet hermetically sealed refrigeration compressors 4 Ins
15. mostat 6 Replace defective component 11 MR05 Undercounter Laboratory Refrigerators Service 8 7 Replacement parts Service Parts List ITEM NO PART NO DESCRIPTION 1 325051801 8 CONTROL ASSEMBLY 2 NOT SHOWN 306543G01 S SERVICE EVAPORATOR ASSY ITEM 3 amp 4 3 306539H01 CAP DRIER STRAINER ASSY 4 NOT SHOWN 306052H01 COOLER UNIT 5 314803H01 115V 60HZ 1 5HP CONDENSING UNIT 6 322288601 S SERVICE DOOR INCLUDES ITEM 7 8 amp 9 7 306062H01 HINGE EACH 2 REQUIRED 8 306061H01 LATCH amp STRIKE 9 306096H01 GASKET MAGNETIC 10 306060H01 CONTAINER 11 NOT SHOWN 324019H01 MANUAL 12 306121H01 PILASTER 13 NOT SHOWN 47093H04 COPPER TUBE 375 OD 14 NOT SHOWN 311672H01 HARNESS XT11S POWER 15 322290H01 KICK PLATE amp GRILL 16 306078H01 CLIP SHELF 17 322285H01 POWER CORD JUNCTION BOX 18 NOT SHOWN 41026H87 TRANSFORMER 110 220V PRI 12 24V SEC 25VA UL 19 310869H01 DIXELL XT11S DTD 12 VAC NTC PROBE 20 310870HO1 MOUNTING ADPTR FOR XTI1S 31 X 64 21 NOT SHOWN 305041G02 RELAY AND SNUBBER ASSEMBLY 22 NOT SHOWN 47015HO1 RETAINER SUCTION LINE TUNNEL 23 NOT SHOWN 47014H01 TUNNEL SUCTION LINE A R 24 NOT SHOWN 325048HO 1 PROBE HARNESS 25 316277H01 SHELVES FULL 12 MRO05 Undercounter Laboratory Refrigerators Warranty Statement 9 Warranty Statement MR Family of Products Domestic and International Warranty 24 Months Full Warranty Parts and Labor During the first t
16. ng it verify that this product is suitable for its intended use Do not modify system components especially the controller Use OEM exact replacement equipment or parts Before use confirm that the product has not been altered in any way gt gt P gt gt WARNING For personal safety and trouble free operation this unit must be properly grounded before it is used Failure to ground the equipment may cause personal injury or damage to the equipment Always conform to the National Electrical Code and local codes Do not connect unit to already overloaded power lines Disconnect the unit from all power sources before cleaning troubleshooting or performing other maintenance on the product or its controls WARNING These refrigerators are not for use as a medical device not approved for storage of blood or blood products not intended for the storage of flammable materials CAUTION Connect the equipment to the correct power source Incorrect voltage can result in severe damage to the equipment NOTE This unit is designed to operate in areas that are heated to 60 F 15 6 C Installation in unheated areas may require a low temperature compressor protection kit for satisfactory operation Safety Disclaimer If the equipment is used in a manner not specified by the manufacturer protection afforded by the equipment may be impaired MR05 Undercounter Laboratory Refrigerators Specifications 2 Specifications 2 1 Genera
17. ning Close door a slight resistance to removal of the dollar bill test strip should be felt Check the perimeter of the door Adjust 1 and or striker as necessary for proper door closure I EVAPORATOR PROBE X 6 elite RB CONTROL BOX ASSEMBLY 1 TO DISPLAY HPCO SED querer 325040H01 MR05 Undercounter Laboratory Refrigerators Service FOR SERVICE BY A QUALIFIED TECHNICIAN ONLY 8 5 Controller Operations The MRO5 Series refrigerator uses a Dixell XRO2CX controller to maintain unit temperature The controller is located inside the unit and is designed to be accessed only by qualified refrigeration technicians This unit comes pre programmed with factory set values which have been found to suit most users Adjusting settings may have detrimental effects on operation DIGITAL CONTROLLER XRO2CX General Description Model XR02CX is a digital thermostat with off cycle defrost designed for refrigeration applications at normal temperature The Regulation Output The regulation is performed according to the temperature measured by the Temp thermostat probe with a positive SET ON RM differential from the set point if the str temperature increases and reaches i Time set point plus differential the
18. ntial 0 1 25 3 C L1 Other 1 45 F LS Minimum Set Point 55 C SET 40 C L2 d2 Evaporator probe display read only 67 F SET Pt Parameter code table US Maximum Set Point SET 99 C 99 C L2 rL Software release sr ot First probe calibration 9 9 9 9 C 0 5 L2 18 189F Alarm Signalling P2 Second probe presence n Y y L2 Mess Cause Outputs oE Second probe calibration 9 9 9 9 C 0 0 L2 18 18 p 1 Room probe failure Compressor output according ere EGER T to e Cn Cy Anti short cycle delay 0 50 min 1 L1 p2 Evaporator probe Defrost end is timed Cy Compressor ON time faulty probe 0 99 min 5 L2 failure Cn Compressor OFF time faulty probe 0 99 min 5 L2 HA Maximum Outputs unchanged DISPLAY temperature alarm CF Measurement units C F C L2 TA Minimum Outputs unchanged rE Resolution only for C dE dE 11 temperature alarm Ld Default Display P1 P2 SP 12 zm Display dela 0 15 min 0 L2 EA External alarm Outputs unchanged id SP DEFROST CA Serius external alarm All outputs OFF RR dE Defrost termination temperature 50 50 C 4 C L1 dA Door open Compressor and fans restarts DIE id Interval between defrost cycles 0 99 hours 1 L1 Md Maximum length for defrost 0 99 min 15 L1 Alarm recovery dF Display during defrost rt in dE dE L2 Probe alarms P1 and P2 start some seconds after the fault in the ALARMS related
19. oad 1 Reduce load or add additional equipment pressure 2 Expansion valve overfeeding 2 Check remote bulb Adjust superheat Low suction 1 Insufficient refrigerant in system 1 Check for leaks Repair and add charge pressure 2 Restriction in refrigeration system 2 Determine location and remove Most notably the liquid line filter drier or capillary 3 Expansion valve malfunctioning 3 Check and reset for proper superheat Suction line 1 Expansion valve passing excess 1 Readjust valve or replace with smaller valve frosted or refrigerant or is oversized sweating 2 Expansion valve stuck open 2 Clean valve of foreign particles and replace if necessary 3 Evaporator fan motors not running 3 Determine reason and correct Check door switch 4 System overcharged with refrigerant 4 Correct the charge Liquid line frosted 1 Restriction in liquid line filter drier 1 Determine location and remove or sweating line shutoff valve partially 2 2 Openvave 1 1 valve Ice accumulating Defrost duration too long arters defrost termination on ceiling around Fan delay not ee fans after 2 Defective fan delay thermostat Replace EE _ not clearing of freezing point during defrost valve Le GE 3 Drain line plugged 3 Clean drain line 4 Defective drain line heater 4 Replace heater 5 Poor contact between drain pan and 5 Repair heater element 6 Defective timer or defrost ther
20. oads are automatically reset Check unit closely when compressor comes back on line 4 No cooling required 4 None Wait until control calls for cooling 5 Control contacts stuck in open position 5 Replace control 6 Loose wiring 6 Check all wiring junctions tighten all terminal screws 7 Improper wiring 7 Check wiring against diagram 8 Liquid line solenoid valve will not open 8 Repair or replace solenoid coil 9 Motor electrical trouble 9 Check motor for open windings Short circuit or burn out 5 Motor electrical trouble 5 Check motor for open windings Short circuit or burn out 6 Internal mechanical trouble in 6 Replace compressor compressor 4 Start relay failure or wrong 5 Motor electrical trouble 5 Check motor for open windings Short circuit or burn out 6 Internal mechanical trouble in 6 Replace compressor compressor 7 Improper wiring 7 Check wiring against diagram 8 Excessively high discharge pressure 8 See high discharge pressure symptom MR05 Undercounter Laboratory Refrigerators Service TROUBLESHOOTING SERVICE CHART Compressor 1 Excessively high discharge pressure 1 See high discharge pressure symptom starts and runs 7 Tow voltage to unit 2 Determine reason and correct but short cycles on overload 3 High voltage to unit 3 Determine reason and correct protector 4 Thermal overload protector defective 4 Check current Replace protector
21. pection for Damage At delivery examine the exterior for physical damage while the carrier s representative is present If there is no exterior damage unpack and inspect the equipment within five days of delivery If you find any damage keep the packing materials and immediately report the damage to the carrier Do not return goods without written authorization When submitting a claim for shipping damage request that the carrier inspect the shipping container and equipment 5 Installation Instruction 7 Do not install temperature sensing cables using the front door gasket Instead use the rear access ports 6 Operating Instructions 6 1 Temperature Control The temperature control system is preset by the factory to maintain a cabinet temperature of 4 C Adjustment of operating values are possible but may change unit performance Consult a qualified service technician if you have questions about settings 6 2 Automatic Defrost The defrosting process on all models is primarily accomplished by air circulated during off cycle periods Under normal conditions the temperature warm up during defrost is virtually unnoticeable However an occasional 2 C warm up is possible if usage is heavy and ambient conditions are extreme 7 Maintenance Instructions This product is a complete packaged unit ready to operate when plugged into an electrical source Read all the instructions before proceeding with installation 1
22. probe they automatically stop some seconds after the probe AU Maximum temperature alarm ALL 99 99 C L2 ALL 210 F restarts normal operation Check connections before replacing the probe Temperature alarms HA and LA automatically stop as AL Minimum temperature Alarm pg TUM 12 soon as the temperature returns to normal values Ad Temperature alarm delay 0 99 min 15 L2 Alarms EA and CA with iF bL recover as soon as the digital dA of temperature alarm at 0 99 min 99 L2 n startup input is disabled OTHER Connections d2 Evaporator probe display Read Only Li Pt Parameter code table Read Only L2 rL Firmware release Read Only L2 VAM 16FLA 96LRA 16 5 A 250V NOTE Fast on maximum current 16A MR05 Undercounter Laboratory Refrigerators Service 8 6 Troubleshooting It is recommended that a qualified refrigeration technician conduct evaluation and troubleshooting TROUBLESHOOTING SERVICE CHART Compressor will not start no hum Compressor will not start hums but trips on thermal overload Compressor starts but does not switch off of start winding 1 Line disconnect switch open 1 Close disconnect switch 2 Fuse blown or breaker tripped 2 Check electrical circuits and motor windings for shorts or grounds Investigate for possible overloading Replace fuse or reset breaker after fault is corrected 3 Thermal overload tripped 3 Overl
23. wenty four 24 months from shipment Company through its authorized Dealer or service organizations will at its option and expense repair or replace any part found to be non conforming in material or workmanship Company reserves the right to use replacement parts which are used or reconditioned Replacement or repaired parts will be warranted for only the unexpired portion of the original warranty This warranty does not apply to damage caused by i accident misuse fire flood or acts of God ii failure to properly install operate or maintain the products in accordance with the printed instructions provided iii causes external to the products such as but not limited to power failure or electrical power surges iv improper storage and handling of the products v use of the products in combination with equipment or software not supplied by the Company or vi installation maintenance repair service relocation or alteration of the products by any person other than Company or its authorized representative To obtain proper warranty service you must contact the nearest authorized service center or Dealer Company s own shipping records showing date of shipment shall be conclusive in establishing the warranty period At Company s option all non conforming parts must be returned to Company postage paid and replacement parts are shipped FOB Company s location Limitation of Liability THIS WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHE
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