URS-1 Service Manual up to 06
Contents
1. SERVICE AND PARTS MANUAL SERIAL NUMBERS UP TO 06 10616 TROUBLESHOOTING AND SERVICE GUIDE The following is intended as a quick service guide designed to diagnose most common problems It is intended to be used only as a guideline Should the unit require actual replacement of components those must be done by a trained and licensed refrigeration professional While the unit is within the factory warranty period all repairs require prior factory authorization before the work is actually performed UNIT NOT COOLING e POWER TO THE UNIT Is there power to the unit Is the voltage within 10 of 115 VAC Low power conditions affect the amperage draw of the compressor requiring more amperes on start up If the amperage draw is too high the compressor safety relay could trip leading to component prema ture failure if the compressor is tripping on it s safety relay on startups the unit will not refrigerate as required e COMPRESSOR NOT RUNNING Is the compressor not running when the controller calls for cooling to begin see point above Verify that power to the compressor is correct and the starter and safety relays are working properly e CONDENSR FAN NOT RUNNING Is the compressor running but not the condenser fan The con denser fan is on the same circuit as the compressor They both operate at the same time Verify that the condenser fan receives power and the fan blades rotate freely Verify if there is2. 40 F The refrigeration control has been preset at the factory for normal everyday operation under standard room conditions Should you require to change the temperature setting higher or lower than the stan dard factory set of 25 F this procedure can be done very quickly as follows Press the SET amp button for 1 second to display the set point temperature 25 F default Hold the SET amp key until the set point starts flashing Use the 4 key to increase the temperature or w key decrease the temperature Press the SET amp button once more to confirm the value The display will stop flashing Pe I Note The 4 UP and W DOWN keys also serves as indicator lights to show when the compressor is ON or when the unit is on DEFROST mode UP KEY Compressor ON eee Status Light see note SET POINT KEY Alarm indicator see note DOWN KEY Defrost Status Light Figure 1 Figure 2 ADJUSTMENTS ITEMS TO REMEMBER gt FOR NORMAL OPERATION SET THE UNIT TO 25 F gt PLEASE NOTE THAT THIS IS NOT THE INTERNAL REFRIGERATOR CABINET TEMPERATURE gt DO NOT CHANGE THE TEMPERATURE SETTING MORE THAN 3 F AT A TIME gt ALLOW 24 HOURS FOR THE REFRIGERATOR TO REACH A NEW TEMPERATURE SETTING gt THE MOTOR WILL START AND STOP OFTEN THIS IS NORMAL OPERATION gt KEEP YOUR REFRIGERATOR LEVELED NOTE Depending on the controller revision model it will either have indicator li
3. 902 SUCTION PRESSURE TEMP 18 PSI 20 F ACCEPTABLE RANGE 12 21 PS I COIL TEMP 10 F 24 F LIQUID PRESSURE TEMP 125 PSI 100 F ACCEPTABLE RANGE 125 147 PSI AMBIENT TEMP 80 F 90 F 170 PSI 120 F ACCEPTABLE RANGE 170 197 PSI AMBIENT TEMP 100 110 F Sporlan OMNI Stat Controller Settings lt Values to be changed from default Model 952892 120 VAC Access PASSWORD S O PASSWORD PS Password tw _ Ie Ambient probe calibration to o F 7 J y O l2 Measurement Stability as 4 l J S r l4 robeto display O ambient 1 proauc o o0 J v I5 unitof Measure 0 c 1 F Jaf o J r REGULATION PARAMETERS rd Regulating Differentia f 2 F v7 m4 Minimum Allowed Temperature setting 45 50 F J y 2 Maximum Allowed Temperature setting 40 6o F J v r3 Enable Def alarm when max def tme reached 0 0 o J v r4 Automatic variation of setpoint NOT USED 3 3 do o d v COMPRESSOR PARAMETERS cO Delay compressor after poweron 0 0 Minutes c1 Minimum time between 2 compressor runs O 0 Minutes c2 Compressor shut down minimum time 5 0 Minutes c3 Compressor Operation minimum time O0 O0 Minutes c4 Compressor Safety o oFF 10020 400 o J cc Continuous Cycle Duration 4 4 Hors v c6 Alarm Delay after continuous cyce 2 2 Hous DEFROST PARAMETERS DEFROST
4. PARAMETERS _ _ _ __ m a ee ee ee dl Defrost interval o interval Hours D M O r e E Minutes vf d4 Defrost after poweron nosi ves Jof o I as peros deayaterponeron o o fumes d6 Block Display during Defrost o no t ves 1 1 m E a E a a d fp larm delay after defrost Hours Defrost priority over minimum compressor time 0 NO 1 YES di Defrost probe display temperature rT j s yo o dc Time base for dl and dP 0 hrs 1 minutes a S O ALARM PARAMETERS ALARM PARAMETERS O OSO AP__farm and Fane Dieren teme 91 0 l E o ooo y AL _Lowtemperature alarm 0 0FF of o f 3 vy an hight tomperatur alam 0 0FF o o v Ad Aarm Temperaturedelay Oo o0 f Minutes 7 A7 Aarm imput detection delay o o Minutes 7 7 OTHERPARAMETERS eS SISIS IS lt S SIS OTHER PARAMETERS HO fs Serial Address communications Alarm Relay a O Alarm w relay ON 1 Alarm w relay OFF H2 j Disable Buttons 1 Enable Buttons H5 identification for Programming T_ External Programming UNDERSTANDING THE REFRIGERATION CYCLE The Refrigeration Controller unit that manages all the refrigerator operations and performance is a rugged and highly sophisticated commercial grade Sporlan Electronic Controller Like all refrigerators as the unit cools and maintains the desired product temperature it s internal temperature will fluctu ate between ON and OFF periods
5. ED Is the unit fully stocked If the unit is not properly stocked or half empty the unit will have to work harder Air does not hold temperature products do If there is not product in the re frigerator the unit will turn ON and OFF several times per hour If the unit is fully stocked the run time will be extended but also the off time allowing the compressor to cool down properly between cycles This will help the unit run more efficiently as several runs per hour will increase compressor tempera tures thus requiring the condenser fan to speed up and provide more airflow to cool the unit PERFORMANCE ENVELOPE The URS 1 has a performance envelop up to 110 F ambient temperature This means that the unit is capable of maintaining an internal cabinet temperature between 22 F and 40 F when exposed to 110 F ambient temperature The unit will operate without shutting off when the ambient temperature exceeds 100 F in order to maintain the internal cabinet temperature stated above These peak temperatures oc cur at least for a few hours a day on hot weather locations and should be considered normal under standing that the unit will shut down when ambient temperatures return to normal conditions CONTROLLER SETTINGS AND ADJUSTING TEMPERATURES Your ALFRESCO refrigerator features an exclusive digital programmable thermostat see figure 1 that controls all functions of the unit The operating temperature of the unit is user adjustable from 15 F to
6. NT COMPRESSOR 260 0026 EVAPORATOR COIL 250 0006 CONDENSER COIL 250 0020 HARDWARE COMPONENTS HINGE BODY SIDE 130 1337 HINGE DOOR SIDE 130 1338 BUSHING SHOWN 130 1340 ADJUSTABLE HINGE KIT 910 0180 DOOR REPAIR THERMAL EXPANSION VALVE 220 0002 REFRIGERANT TXV ORIFICE 220 0009 FILTER DRIER 220 0029 USE ONLY FOR TOP CAP BEER LINE TUBE 290 0082 HINGE SCREW COVER CLIP ARROW CLIP 200 0043 PC BOARD STAND OFF 290 0009 SELF LOCKING CABLE TIE PUSH MOUNT 210 0258 Hardware components Cont REPLACEMENT GLASS FOR LIGHT FIXTURE 210 0286 COMPRESSOR J BOX SUPPORT CLIP 260 0044 CONDENSER FAN FINGER GUARD 210 0267 FRONT LEG 290 0098 REAR WHEEL 290 0091 FOR SERVICE CALL 1 866 203 5607 When calling please provide the following information model number serial number and date of installation along with a brief description of the problem The model number and serial number can be found on a plate located near the top of the inside left wall An
7. debris in the blades that prevents it from starting ie leaves paper grass clippings etc e BACK ON THE UNIT Is the back cover on the unit The back is part of the airflow system to route the air over the condenser If the back is removed for cleaning or during installation it must be placed back on the unit so it operates correctly NOT HOLDING TEMPERATURE CORRECTLY e CONTROL SET POINT Is the unit operating with the correct set point Please verify according to the list provided in the controller programming on the following chapter of this booklet e OPERATING DIFFERENTIAL The unit operates in a 10 to 15 degree differential on average de pending on the quantity of items in the unit The unit will cycle ON and OFF several times so the product temperature is an average of the cycle see section Understanding the refrigeration cycle e DEFROST MODE Is the unit currently in defrost mode The unit defrosts until the coil temperature reaches 50 F This is not the temperature of the product this is just the air temperature during de frost e EVAPORATOR COIL INTAKE Is the evaporator coil intake blocked by product For the coil to cool properly it must have good air circulation If the customer has product blocking the air intake such as soda cans bottles loosely wrapped products in plastic bags etc these items can block the airflow to the coil Without airflow the cooling performance diminishes quire rapidly preven
8. depending upon ambient temperature how many times the door is open and for how long it s held open To minimize ON running times and save energy it is recommended to open the door for the smallest amount of time and frequency The URS 1 unit is factory preset with a set point of 25 F and with a 19 F differential cycle This means that the URS 1 unit will refrigerate until it reaches 25 F internal air temperature At that point the unit will turn OFF and will remain off until it reaches 44 F Due to the 19 F differential temperature cycle It is important to understand that your product will not actually reach 44 F The average product temperature will settle somewhere midway between the ON and OFF set points approximately 32 F 35 F depending on the product type Please refer to the following graph for a representation of the refrigeration cycle EVAPORATOR DISCHARGE AIR TEMPERATURE INSIDE CABINET AVERAGE PRODUCT TEMPERATURE 32 F 35 F 44 F a l i 5 oe UNIT TUR NS ON DIFFERENTIAL ee ee TEMPERATURE p 19 F IS ACTORY SET TEMPERATURE 25 F UNIT TURNS OFF NOTE THIS IS THE URS 1 FACTORY DEFAULT SETPOINT TIME The 19 F differential is used to provide you with the best possible energy savings A smaller differential would cause the unit to start and stop several times per hour wasting energy The Electronic Temperature Controller in the URS 1 allows the user to change and a
9. djust the default set point 25 F between 15 F and 40 F consequently the product temperature will average lower or higher temperatures as desired Please refer to CONTROLLER SETTINGS on the following page for adjustments to the set point Always remember When the door is opened on the URS 1 the display will read the cabinet temperature at that very moment That is not your product temperature URS 1 SERVICE PARTS LISTING The following is a list of all components and or hardware that are serviceable on the URS 1 refrigerator unit Please refer to the picture and attached text for reference and identification ELECTRICAL COMPONENTS Sach a ET te a tf E ES el a EE a CONDENSER FAN 210 0026 MAIN POWER SWITCH 210 0021 LIGHT TRANSFORMER 210 0266 CONDENSER FAN SPEED CONTROL 210 0027 SPEED CONTROL _ SENSOR 210 0028 MAIN POWER CORD 210 0287 EVAPORATOR POWER CABLE 210 0020 4 POSITION TERMINAL BLOCK 210 0301 EVAPORATOR FAN 210 0025 LIGHT SWITCH 210 0298 LIGHT FIXTURE 210 0249 og 210 0030 amp TEMPERATURE CONTROLLER KIT TEMPERATURE CONTROL SENSOR 210 0031 COMPRESSOR STARTER KIT PTC RELAY SAFETY 260 0079 6 POSITION TERMINAL BLOCK 210 0302 REFRIGERATION COMPONENTS REFRIGERA
10. ghts on the buttons themselves see figure 2 or newer models will have indicator symbols on the left side of the display If so these 3 status symbols will indicate the following e Shows when the compressor is ON a Shows that there is an ALARM Shows the unit is on DEFROST OPERATIONAL PARAMETERS There are two sets of parameters that can be access on this controller Some require a password other do not 1 Press the SET button for 1 second to display the set point temperature 25 F default 2 Hold the SETE key for at least 5 seconds once more the set point starts flashing and after 5 seconds the letters PS will appear on the screen PS PASSWORD 3 Release the SET amp key 4 At this point press the SET amp once more and use the A or w keys to reach the number 22 on the screen this is your password 5 Press the SETS key once more to return the display to PS 6 Use the 4 or w keys to cycle through the different programming parameters 7 ALWAYS Press the SETS button for at lest 5 seconds to exit the programming mode Review MENU ITEM PROGRAM CHANGE ITEM CONFIRM MENU ITEM PRESS A W KEYS PRESS SETA KEY TO CHANGE SETA KEY example P 5 example P 5 Please verify all programmed operational variables according to the list on the following page The URS 1 unit should now operate with peak efficiency REFRIGERATION REFRIGERANT 134A
11. ting cooling and building ice is the coil further blocking airflow and cooling capacity NOISY FAN OPERATION e AMBIENT TEMPERATURE Is the ambient temperature about 100 F or above The condenser fan operates with a temperature controlled speed control in order to minimize noise If the temperature surrounding the unit is about 100 F the unit will operate at full soeed to cool the unit as needed e REQUIRED RUN TIME Is the unit running for too long As temperature rises and the refrigerator re quires cooling the compressor will get hotter requiring further cooling thus increasing the fan speed due to excess heat from the unit e RESIDUAL HEAT Is the unit placed outside in a concrete slab or on a sunny area Residual heat that you will have on a hot concrete slab or walkway will in increase condenser fan speed and air is forced through the condenser coil under the unit The air going through the intake is next to a hot sur face thus warmed up before entering the unit Consequently the unit has to work harder to maintain the proper refrigerating capacity and needs speed up the fan e DEBRIS IN THE BAN BLADE Is there debris in the condenser fan blade Not only can debris physi cally stop the fan blade from rotating as discussed previously but is can also block airflow thus pre venting the unit for cooling As the air get hotter in the unit from lack of airflow the condenser fan will increase speed to allow more airflow e FULLY STOCK
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