GENERAL COMPONENT LOCATION: CONTROLLER LOCATION AND MAIN POWER SWITCH (COVER REMOVED) COMPRESSOR CONDENSER FILTER DRIER FAN TXV LOCATION POWER J-BOX EVAPORATOR ASSEMBLY EVAPORATOR FAN REMOVED FOR REPLACEMENT. REMOVE PLATE AND BRACKET FOR FAN MOTOR REPLACEMENT. 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: • 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 premature failure. if the compressor is tripping on it’s safety relay on startups, the unit will not refrigerate as required. • 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. • CONDENSR FAN NOT RUNNING: Is the compressor running but not the condenser fan? The condenser 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 is debris in the blades that prevents it from starting (ie: leaves, paper, grass clippings, etc…) • VENTILATION IN THE UNIT: Does the unit have enough ventilation on the back to allow for free cool air to reach the condenser? Many installations have no outside ventilation reaching the condenser as they place the unit into a closed space that only re-circulates air discharged from the condenser “back” to the condenser reducing performance drastically. Verify that there is an outside source for fresh air into the condenser. NOT HOLDING TEMPERATURE CORRECTLY: • 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. • OPERATING DIFFERENTIAL: The unit operates in a 3 degree differential on average depending 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”) • 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 defrost. • EVAPORATOR COIL ICED UP: Is the evaporator coil iced up due to incorrect (too low) of a set point? Verify that the unit defrosts properly and the evaporator coil is clean of heavy frosting during operation. NOISY OPERATION: • DEBRIS IN THE BAN BLADE: Is there debris in the condenser fan blade? Not only can debris physically stop the fan blade from rotating (as discussed previously), but is can also block airflow thus preventing 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. • FULLY STOCKED: 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 refrigerator 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 temperatures thus requiring to work harder to cool down. • TUBING RUBBING: Are there any tubes in the compressor area rubbing against each other? Is there any rubbing between the tubing and the condenser fan housing or fan motor itself? The installation of components at the back of the unit requires to have components closed together. During shipment and installation some of these components might shift rubbing each other. Please verify there are no lines rubbing or too close together as to touch when operating. 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 25°F to 45°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 standard factory set of 35°F, this procedure can be done very quickly, as follows: 1. 2. 3. 4. Press the “SET ” button for 1 second to display the set point temperature (35°F) default. Hold the “SET ” key until the set point starts flashing. Use the c key to increase the temperature or d key decrease the temperature. Press the “SET ” button once more to confirm the value. The display will stop flashing. Note: The c “UP” and d “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 Status Light) see note See Note SET POINT KEY (Alarm indicator) see note DOWN KEY (Defrost Status Light) Figure 1 Figure 2 ADJUSTMENTS ITEMS TO REMEMBER: ► ► ► ► ► ► FOR NORMAL OPERATION SET THE UNIT TO 35°F. PLEASE NOTE THAT THIS IS NOT THE INTERNAL REFRIGERATOR CABINET TEMPERATURE. DO NOT CHANGE THE TEMPERATURE SETTING MORE THAN 3°F AT A TIME. ALLOW 24 HOURS FOR THE REFRIGERATOR TO REACH A NEW TEMPERATURE SETTING. THE MOTOR WILL START AND STOP OFTEN. THIS IS NORMAL OPERATION. KEEP YOUR REFRIGERATOR LEVELED. NOTE: Depending on the controller revision model, it will either have indicator lights 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: Shows when the compressor is ON 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 (35°F) default. 2. Hold the “SET ” 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 ” key. 4. At this point, press the “SET ” once more and use the c or d keys to reach the number 22 on the screen (this is your password). 5. Press the “SET ” key once more to return the display to “PS”. 6. Use the c or d keys to cycle through the different programming parameters. 7. ALWAYS Press the “SET ” button for at lest 5 seconds to exit the programming mode. Review: MENU ITEM: (example: PS) PROGRAM: PRESS “SET ” KEY CHANGE ITEM: c d KEYS CONFIRM: PRESS “SET ” KEY MENU ITEM: (example: PS) Please verify all programmed operational variables according to the list on the following page. The ARFG-42 unit should now operate with peak efficiency. ◄ Values to be changed from default Sporlan™ OMNI-Stat® Controller Settings Model: 952892 - 120 VAC Code: Parameter: Value Default UOM 22 22 # 0 4 0 4 °F ~ 0 1 0 0 ~ ~ 3 25 45 0 2 -50 60 0 °F °F °F ~ r4 Automatic variation of set point - NOT USED COMPRESSOR PARAMETERS Delay compressor after power on c0 3 3 ~ 0 0 Minutes Minimum time between 2 compressor runs c1 Compressor shut down minimum time c2 Compressor Operation minimum time c3 Compressor Safety (0=OFF / 100=ON) c4 Continuous Cycle Duration cc Alarm Delay after continuous cycle c6 DEFROST PARAMETERS Defrost type (0=heater / 1=Hot Gas / 2=timed heater / 3=timed HG) d0 Defrost interval dI Defrost Ends Temperature dt Max. Defrost Duration dP Defrost after power on (0= NO / 1= YES) d4 Defrost delay after power on d5 0 2 0 100 4 2 0 0 0 0 4 2 Minutes Minutes Minutes ~ Hours Hours 2 4 50 30 0 0 3 8 4 30 0 0 ~ Hours °F Minutes ~ Minutes 1 2 1 1 2 1 ~ Minutes Hours 0 ~ 0 ~ ~ ~ 0 0 ~ 0 0 0 0 0 0 0 0 0 0 °F °F °F Minutes Minutes 1 1 ~ 1 1 ~ 1 0 ~ 1 0 ~ ~ ~ ~ PASSWORD Password PS PROBE PARAMETERS /c Ambient probe calibration /2 Measurement Stability /4 Probe to display (0=ambient / 1=product) /5 Unit of Measure (0=°C / 1= °F) REGULATION PARAMETERS Regulating Differential rd Minimum Allowed Temperature setting r1 Maximum Allowed Temperature setting r2 Enable Def. alarm when max def. time reached r3 d6 dd d8 d9 d/ Block Display during Defrost (0= NO / 1= YES) Dripping time after defrost Alarm delay after defrost Defrost priority over minimum compressor time (0= NO / 1= YES) Defrost probe - display temperature Time base for dI and dP (0= hrs / 1= minutes) dc ALARM PARAMETERS Alarm and Fans Differential Temp A0 Low temperature alarm (0= OFF) AL Hight temperature alarm (0=OFF) AH Alarm Temperature delay Ad Alarm imput detection delay A7 OTHER PARAMETERS Serial Address (communications) H0 Alarm Relay Operation (0=Alarm w/relay ON 1=Alarm w/ relay OFF) H1 H2 H5 T 0= Disable Buttons / 1=Enable Buttons Identification for Programming External Programming Access W/O PS With PS 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 fluctuate between ON and OFF periods 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 ARFG-42 unit is factory preset with a set point of 35°F and with a 3°F differential cycle. This means that the ARFG-42 unit will refrigerate until it reaches 35°F internal air temperature. At that point, the unit will turn OFF and will remain off until it reaches 38°F (Due to the 3°F differential temperature cycle). It is important to understand that your product will not actually reach 38°F. The “average” product temperature will settle somewhere midway between the ON and OFF set points (approximately ~ 37°F) depending on the product type. Please refer to the following graph for a representation of the refrigeration cycle: The 3°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 ARFG-42 allows the user to change and adjust the default set point (35°F) between 25°F and 45°F, consequently the product temperature will average lower or higher temperatures as desired. Please refer to “CONTROLLER SETTINGS” Always remember: When the door is opened on the ARFG-42, the display will read the cabinet temperature at that very moment. That is not your product temperature. ARFG-42 SERVICE PARTS LISTING: The following is a list of all components and or hardware that are serviceable on the ARFG-42 refrigerator unit. Please refer to the picture and attached text for reference and identification. ELECTRICAL COMPONENTS: CONDENSER FAN 210-0105 EVAPORATOR FAN 210-0265 LIGHT SWITCH 210-0298 MAIN POWER SWITCH 210-0021 LIGHT BULB (COATED) 210-0245 MAIN POWER CORD 210-0287 LIGHT SOCKET 210-0314 TEMPERATURE CONTROLLER KIT 210-0030 TEMPERATURE CONTROL SENSOR 210-0031 4 POSITION TERMINAL BLOCK 210-0301 6 POSITION TERMINAL BLOCK 210-0302 REFRIGERATION COMPONENTS: REFRIGERANT COMPRESSOR 260-0055 EVAPORATOR COIL 250-0057 CONDENSER COIL 250-0061 THERMAL EXPANSION VALVE 220-0004 REFRIGERANT TXV ORIFICE 220-0009 FILTER DRIER 220-0029 HARDWARE COMPONENTS: DRAWER GASKET 290-0164 DOOR HINGE REPLACEMENT KIT 290-0155 DOOR GASKET 290-0165 CONDENSER FAN FINGER GUARD AND MOTOR MOUNT 210-0253 EVAPORATOR COIL FINGER GUARD 200-0182 (Hardware components—Cont.) CONDENSER FAN BLADE 210-0250 EVAPORATOR FAN BLADE 210-0315 FOOD PAN 1/2 SIZE x 6” D 290-0130 HOW TO OBTAIN ADDITIONAL HELP AND SERVICE: For warranty, service, contact your local Alfresco Gourmet authorized service agency. Provide us with the Model #, Serial #, date of installation, and a brief description of the problem. While the unit is within the factory warranty period, all repairs require prior factory authorization before the work is actually performed. Please contact: Alfresco Gourmet Grills Customer Service Department 7039 East Slauson Avenue Commerce, CA 90040. Customer Service/Parts Phone: Fax: (888) 383-8800 or (323) 722-7900 (323) 726-4700.