Marvel and Marvel Professional Under Counter Product Service Manual Beverage Centers - Wine Cellars - All Refrigerators Refrigerated Drawers - Refrigerator Freezers - Beer Dispensers - Outdoor Models - Clear Ice Machines Second Edition 41013818-Rev B; August 2015
Section 1: Introduction 1.1 Unit Specifications 1.2 Serial Nameplate 1.2.1 Serial Description 1.3 Servicing 1.4 Basic Refrigeration Tools 1.5 Basic Installation 1.6 Electrical Requirements Section 6: Control System 6.1 User Interface Assembly 6.1.1 Removing the User Interface 6.1.2 Installing a Replacement Interface 6.2 Main Control Board Assembly 6.2.1 Main Control Replacement 6.2.2 Removing the Programming Data Cable 6.2.3 Replacing the Programming Data Cable 6.2.4 Main Control Board Installation 6.
Section 9: Wiring Diagrams 9.1 Block Diagram 9.2 Wiring Schematics - All 9.3 Main Power Board Identification 9.3.1 Single Zone 9.3.2 Dual Zone Section 16: Refrigerator Freezers 16.1 User Interface Control 16.2 Operation 16.3 Characteristics 16.4 Damper Operation 16.4.1 Damper Access 16.5 Fan Operation 16.5.1 Refrigerator Supply Air 16.5.2 Freezer Supply Air 16.6 Thermistors 16.6.1 Thermistor Type 16.6.2 Thermistor Location 16.7 Refrigeration and Mechanical 16.8 Evaporator 16.8.1 Evaporator Type 16.8.
19.6 Diagnostic Charts 19.7 Troubleshooting 19.8 VAC Wiring Diagram 19.9 Specifications 19.10 Ice Production & Harvest Guidelines 17.10.3 Refrigerated Drawers: 6 cu. ft. 17.11 Thermistor Resistance Chart 17.12 Wiring Diagram 17.13 Generic Troubleshooting Table 17.13.1 Refrigerated Drawers 17.13.2 Beverage Centers and Dispensers 17.14 Refrigeration and Mechanical Section 20: Service Kits/Bulletins 20.1 Refrigerated Drawer – Mullion Heater Kit 20.2 Evaporator Replacement Kit (also refer to section 3.6) 20.
Section 1: Introduction 1.
1.2 Serial Nameplate: The serial plate location is model dependent on the beverage centers, wine coolers and refrigerated drawer models. The serial plate is located on the inside of the cabinet affixed to the left hand side (top or bottom) of the plastic liner. Beverage centers and wine coolers: Upper front corner on left hand side of liner. Refrigerated drawers: Left hand liner bottom, front side beneath the bottom drawer.
1.3 Servicing • • • • • • • • • Always disconnect power to any appliance before attempting to service it. Always verify that the power has been disconnected. If the unit has been running, use caution around the compressor, condenser and copper tubing. These areas may be very hot. Use caution around the condenser wires and metal edges. These areas could be sharp. Refrigerant is under high pressure. Always evacuate any system before attempting to open it.
1.5 Basic Installation Units can be installed freestanding* or built-in. The front of the unit must be unobstructed for proper air circulation and operation at all times. NOTE: * Professional and overlay door models cannot be installed free standing. Units with the “Articulating Hinge” must be installed as built-in due to safety restraints. Area should be ventilated and without exposure to extreme temperatures. Unit must be installed indoors and away from the elements of nature.
Section 2: Sealed System 2.1 Introduction The following should always be practiced with any sealed system that has been opened. Only open the sealed system after proper diagnosis has verified a system issue. Eliminate any possible non system related problems such as wiring, control system, airflow, etc. before attempting a sealed system repair. Many times these possibilities can resemble sealed system problems.
2.3 High Side Leaks High side leaks consist of a break in the system at the compressor, condenser, discharge tubing, drier, or capillary tube. If a leak is found at any of these areas, replace or repair the leak. Flush the system with nitrogen gas, evacuated to 50 microns, and recharged. 2.4 Restricted Capillary Tube Moisture or other contaminants that enter the system can cause non condensable deposits in the system.
“Checking the evaporator frost pattern is a good way to quickly diagnose simple sealed system problems. This can be done by allowing the unit to run (at least 10 minutes) with the door open for at least 5 minutes. This will help speed up the normal frosting of the evaporator plate. By visually inspecting the evaporator and feeling it with your hands, you will see and feel as the frost pattern builds across the plate. The frost pattern should cover a majority of the evaporator plate.
2.7 Measuring Evaporator Temperature There are a couple of ways to measure temperature of the evaporator plate: 1. Use a thermocouple to measure the temperature of the evaporator plate. The thermocouple must be secured to the evaporator when taking the measurement. 2. If it has been determined that there is proper contact between the sensor and evaporator plate, the sensor resistance value can be interpolated to be the approximate evaporator temperature. 2.
Vacuum Pump Tips: 1) Remember to change vacuum pump oil after evacuating a contaminated system. 2) Frequent oil changes will increase the pumps potential to achieve the best vacuum possible. 3) Use recommended oil per recommendation of vacuum pump manufacturer. Charge the unit to the specified amount (See unit specifications or serial plate for charge specifications per model).
Weigh in Liquid on High Side Method NOTE: When using this method an access valve should have been attached to the compressor process tube (low side) and the high side process tube on the drier. Using a length of manifold hose, connect one end to the manifold, the other end to the refrigerant cylinder. It is best to use low loss fittings on hoses to avoid loss of charge when removing hoses.
2.9 Temperature / Pressure Chart F° -30.6 -27.02 -23.7 -20.59 -17.67 -14.92 -12.31 -9.84 -7.47 -5.21 -3.04 -0.95 1.05 2.99 4.86 6.67 8.42 10.12 11.77 13.38 14.94 16.46 17.95 19.4 20.81 22.19 23.55 24.87 26.16 27.43 28.68 29.9 R-134A (PSIG) 10 8 6 4 2 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 F° 31.1 32.27 33.43 34.56 35.68 36.77 37.85 38.91 39.96 40.99 42 43 43.98 44.95 45.91 46.85 47.78 48.7 49.61 50.51 51.39 52.26 53.13 53.98 54.82 55.65 56.48 57.29 58.1 58.89 59.68 60.
Section 3: Sealed System Components 3.1. Toe Grill Removal 1. Remove both Phillips screws on each end of the toe grill. 2. There is an oval spacer held in place by each screw, located behind the toe grill. This is to help give an aesthetic appearance once the grill is adjusted and tightened. The oval toe grill spacer is visible in the above picture. Remove each Phillip screws on both ends of the toe grill. Right and left hand views of the toe grill, screen and spacer.
NOTE: When reinstalling the toe grill care must be taken to be sure that the communication cable is routed through the correct area in the toe grill. The below left hand photo shows the correct routing of the communication cable, it must pass freely with clearance on all sides. The below right hand photo shows the incorrect routing of the communication cable. It is very easy for the cable to end up in this position if care is not taken when reinstalling the toe grill.
3.2: Warnings and Cautions WARNING Prior to removing the access cover to the machine compartment, disconnect the supply voltage to the appliance; failure to do this could result in an electrical shock or possible death. CAUTION All electrical parts and wiring must be shielded from torch flame. DO NOT allow torch to touch insulation; the insulation will char at 200°F and flash ignite (burn) at 500°F. Excessive heat will distort the plastic liner. 3.
Remove all perimeter 5/16”screws that secure the back panel – DO NOT remove the 5/16” hex screws in the bottom left and right hand side corners, or the Philips head ground screws. Remove both Phillips screws and grill. Remove both top and bottom screws on each side.
Remove both screws.
3.4: Compressor The following tests should be conducted before concluding the compressor is faulty. 1. Low and high side pressure, temperature of compressor, discharge and suction lines, temperature of air leaving the evaporator compartment, temperature of condenser coil, condenser fan operation, and amp draw at compressor. 2. Use a compressor start cord to isolate and test the compressor. 3. Use an ohmmeter to measure resistance / continuity at the compressor to check for shorted or grounded windings. a.
3.4.2: Remove the Compressor 1. Disconnect power to the unit. 2. Follow the exact steps outlined in “Sealed System Components” to access the compressor. 3. Using the process tubes, install sealed system access valves and recover refrigerant. 4. Remove the TSD2 starter package from the compressor terminals. 5. Unsolder and remove the discharge and suction lines from the compressor. 6. Unsolder and remove the filter / drier. 7.
A common problem with this system is restricted air flow caused by lint, dust, dirt, and pet hair. These particles become built up on the condenser and results in overheating due to the lack of sub-cooling across the coil. NOTE: Another important factor is that the free air space on the toe grill cannot be altered to meet a certain design criteria. Any modifications could jeopardize the integrity of the appliance performance. 3.5.1: Remove the Condenser 1. 2. 3. 4. Disconnect power to the unit.
Slide out the bottom of the machine compartment far enough to unsolder condenser lines. Condenser can be lifted away from bottom assembly after following step 7 above. NOTE: On machine compartments with LEFT HAND SWING doors, a shield is added to prevent the communication cable from being drawn into the condenser coil. It is anchored using the same nut which secures the condenser mounting bracket. The above bracket is used on LEFT HAND SWING doors to anchor the back end of the communication cable. 3.5.
7. Carefully reconnect all electrical terminals back on the terminal board. 8. Carefully push slide-in mechanical base plate assembly back under cabinet. 9. Secure base assembly to cabinet at rear and front locations. 10. Secure base assembly and toe grill. 3.6: Evaporator The evaporator removes heat from the inside of the unit ultimately making the interior of the appliance cold. The evaporator plate is flat in appearance (cold plate) and is installed behind the coil cover.
8. Remove liquid and capillary lines from filter drier. 9. Drill a ½” hole in the left hand corner of the drain sump as close to the side wall as possible. The hole must extend into the machine compartment. 10. Remove any sharp burrs on the roof of the machine compartment created by the drill bit. Cut away suction line at the above locations. Drill a ½” hole downward into machine compartment. See recommendations in step 9 above. Install vibration isolator on heat exchanger assembly behind evaporator.
3.6.2: Install a New Evaporator NOTE: A replacement evaporator assembly (42249079) will include the following components: (1) Evaporator heat exchanger assembly (1) Filter drier (1) Pre bent suction tube extension (1) Vibration Isolator (2) Nylon zip tie fasteners (2) Pieces of permagum 1. Take the replacement evaporator and unroll the capillary tube on the heat exchanger. 2. Absolutely make sure that the ends of the capillary tube and suction line are well capped.
Section 4: Electrical Component Access 4.1: Condenser Fan The condenser fan is used to force air over the condenser coil. The condenser fan cycles on and off simultaneously along with the compressor. 1. Make sure that the motor shaft turns freely. The blade can be turned in either direction to verify that the shaft is not ceased or the blade binding. Watch the blade and listen for any noise that might indicate a problem. 2. Check resistance between the terminals of the motors power cord.
Disconnect red and white wires. Pull wire through grommet. Rotate shroud to right. Tip shroud forward. Lay shroud flat. Disconnect connector.
Exploded View of Condenser Fan assembly 4.1.2: Condenser Fan Replacement 1. Remove the three Phillips screws on the rear of the motor bracket to replace fan motor. 4.1.3: Fan Assembly Installation 1. Prior to reassembling the condenser fan assembly locate the slotted tab on the bottom of the machine compartment. 2. Next locate the notched recess on the bottom of the shroud assembly. 3. Upon assembly, the notched slot on the shroud assembly needs to slide in the slotted tab on the compartment bottom.
4. Once secure, the condenser wire harness along with the white and red compressor wires can be reconnected and the tape from the fiber board can be reattached to the fan shroud. 5. Reattach the assembly to the rear using the screw previously removed. Bracket mounting tab. Bracket mounting slot. 4.1.4: Condenser Fan Blade Spacing If the condenser fan blade has been removed from the motor shaft the fan blade must be properly re-spaced to achieve the optimal performance from the condenser.
4.2: Evaporator Fan Access For all models, with the exception of the beer dispenser, the evaporator fan draws air from the refrigerated space through the bottom supply air louvers, across the evaporator plate, and then re-distributes it back into the cabinet through the fan itself. The beer dispenser fan has reversed air flow.
This exploded view drawing shows the front and rear fan guard. As mentioned on the previous page, the additional rear fan guard was added to outdoor beverage centers and beverage dispensers to prevent wire interference. Disconnect all shelving and associated mounting brackets first – see above instructions Fan location – do not attempt to remove from this view. Remove coil cover first.
Remove thermistor from the shield. Fan assembly attached to rear of coil cover. NOTE: Newer beverage center models made after 20150824xxxH also have a rear fan guard. Supply Air Flow: Blow through fan type. NOTE: Beer dispensers have reversed air flow (draw through). Disconnect fan at harness connection.
Most Models: Evaporator Air Flow: Fan is a blow through type. Specification label facing forward, the blade rotates clockwise as you face the hub. Remove the four screws from the front of the coil cover to remove either fan. Beer Dispensers: Evaporator fan (draw through). Specification label facing towards rear, the blade rotates counter-clockwise as you face the hub. 4.
Beverage Centers Location: Midpoint on left hand side wall. Wine Coolers Location: Midpoint on left hand side wall. Defrost Thermistor Location All Models Location: Top left hand corner of evaporator. .
Section 5: User Interface Display 5.1 Model Variations NOTE: The User Interface Display appearance between the Glass Door and Solid Door / Drawer models. The Light key is missing on Solid Door and Drawer Displays. Glass Door Models: Solid Door and Drawer Models: NOTE: Refer to Section 19 for a Service Bulletin regarding an alarm in the Showroom Mode.
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SECTION 6: Control System 6.1 User Interface Display The user interface display is mounted to the door top and connected to the main power board by means of a communication cable. The cable extends through the door and exits at the bottom hinge location. 6.1.1 Removing the User Interface Display CAUTION It is recommended that a grounding strap be used when working with any solid state control board application.
Place finger nails under left hand lip of user interface display. Lift upwards. Lift user interface away from door receiver. Release locking tab on display connector. User Interface PCA Terminal Description J1 Com Cable to Main Board J2 ICON / Key Switch The user interface can now be removed.
6.1.2 Installing a new User Interface Display 1. Reverse the process used to remove the display board. 2. Carefully place the display back into the door receiver.
6.2: Main Control Board WARNING Prior to removing the access cover to the machine compartment, disconnect the supply voltage to the appliance; failure to do this could result in an electrical shock or possible death. CAUTION It is recommended that a grounding strap be used when working with any solid state control board application. 6.2.1: Control Board Replacement 1. The main power board is located at the bottom rear, left hand corner of the machine compartment. 2.
The photo to the left shows the new modified board bracket to extend the mounting height farther away from the cabinet base. Location of the main power board. Remove screw holding the control board bracket in place.
Disconnecting the two large connectors. Recess on the bottom of the mounting bracket. Slotted tab on the bottom of the machine compartment.
NOTE: For wiring diagrams please refer to: Section 9, Wiring Diagrams. The following pictures represent terminal identification on a single zone main power board. Connectors J1 – J9: See Wiring, Section 9.1 Connectors J4 – J14: See Wiring, Section 9.1 Connectors J5 & J15b: See Wiring, Section 9.
6.2.2: Removing the Programming / Data cable Care must be taken when removing this cable. The cable is located between the main board and the small 2” x 2” programming board. It is not recommended to use a metal tool to unsnap the cable connector. Use of a metal tool could result in a static discharge or accidental damage to the board. 1. The program board is connected to the main board by a row of pins on each side of the board. 2. Grasp the program board on each side with your thumb and forefinger.
6.2.4: Control Board Installation 1. Replace the two connectors, previously removed, to the correct location on the main board. 2. Prior to reinstalling the power board locate the slotted tab on the bottom of the machine compartment. 3. Next locate the notched recess on the bottom of the control bracket. 4. Upon assembly, the notched recess on the control bottom needs to slide into the slotted tab on the machine compartment. 5.
6.3.3: Removing the Cabinet Thermistor 1. 2. 3. 4. 5. Remove interior shelving for ease of access. Remove the decorative caps and screws from the thermistor shield. Remove cantilever shelving brackets if applicable. Disconnect the bad thermistor at the connector plug and remove. For refrigerated drawers: Remove both top and bottom drawers. See “section 7.4.1” regarding drawer removal. 6.3.4: Installing the Cabinet Thermistor 1. Snap the new thermistor into the other half of the connector. 2.
Basic Evaporator Configuration: All Models: Evaporator cover removed. Defrost Sensor Disconnect. Defrost Sensor Location.
Cabinet Sensor Location: Typical on all models. Cabinet sensor connector. 6.3.7: Thermistor Harness Identification: 1. Cabinet sensor, (orange) labeled: “Low Temp”. 2. Defrost sensor, (red) labeled: “Defrost Evap”.
6.4: Temperature Resistance Chart TEMPERATURE C° F° -18 0 -17 1 -16 3 -15 5 -14 7 -13 9 -12 10 -11 12 -10 14 -9 16 -8 18 -7 19 -6 21 -5 23 -4 25 -3 27 -2 28 -1 30 0 32 1 34 2 36 3 37 4 39 5 41 6 43 7 45 8 46 9 48 10 50 11 52 12 54 13 55 14 57 RESISTANCE k ohm 61.941 59.032 56.277 53.667 51.194 48.85 46.627 44.519 42.518 40.611 38.801 37.082 35.451 33.9 32.427 31.027 29.695 28.429 27.224 26.081 24.992 23.955 22.967 22.025 21.126 20.269 19.452 18.672 17.928 17.216 16.536 15.887 15.
6.5: Door Sensor On beverage center and wine cooler models, the door sensor is located on the bottom cabinet flange; approximately one third of the distance away from the handle side of the cabinet. The refrigerated drawers do not use this technology, dual rocker switches are used for drawer models. The door sensor is resistance activated by the pressure of the door gasket. Light functionality and the door alarm are directly related to this switch.
6.5.1: Door Sensor Removal 1. Remove the toe grill. 2. Disconnect the door sensor at the harness terminal behind the trim piece. See photo. 3. Remove the door sensor from the cabinet by starting in one of the upper corners and peeling in a downward motion. 4. Once the sensor has been removed from the flange area: a. Grasp the sensor with the right hand using the thumb and forefinger. b. Grasp the electrical strip portion of the sensor between the thumb and forefinger on the right hand. 5.
6.5.2: Door Sensor Replacement 1. Do not remove the adhesive backing from sensor until it is in place. 2. Slide the new sensor into the gap between the bottom flange and trim piece. 3. Once the sensor is in place: a. Remove the adhesive backer from sensor. b. Ensure the sensor is in position and carefully adhere to the cabinet. Apply carefully using thumb pressure to the outer perimeter of the door sensor. c.
6.6.2 Auto Defrost Drip Time Reference: Dual Zone has been extended to 30 minutes. Defrost is achieved as the result of compressor off time. NO electrical or mechanical alternatives are used. Timed Defrost: is initiated every 6 hours of compressor run time. The evaporator fan is on for the entire defrost cycle. Defrost is active for a period up to 40 minutes of compressor off time. The defrost thermistor will terminate defrost @ 40°F at its evaporator location.
Defrost Time Out (DTO) is the total time of compressor off time; including both defrost and drip time cycles. AS OF 8/1/15 THE FOLLOWING CHANGES WERE MADE TO THE DEFROST TIME OUT (DTO) ON THE FOLLOWING MODELS: On all models except for the RF, RI, DZ and ML24WS; the DTO was expanded from 60 to 75 minutes. Model ML24WS was expanded from 40 to 75 minutes. RF, RI, and DZ models remain the same. 6.6.
Section 7: Lights, Doors, Drawers, and Hinges 7.1 LED Lighting 1. Refrigerated Drawers: are equipped with two LED lights. The upper LED is located on the ceiling of the cabinet, while the lower LED is located on the underside of the mullion assembly. These lights are controlled by the opening and closing of the associated drawer. Each light is controlled by an independent rocker switch, which is located behind each drawer on the back wall of the cabinet. 2.
Refrigerated Drawer Mullion. Cabinet ceiling LED – all models. 7.2: Cabinet Door 7.2.1 Door Removal Remove both Phillips screws holding the toe grill in place; one on each end of the grill. Locate and disconnect the communication cable connector on the bottom of the door (hinge side). Remove the P-clamp securing the communication cable to the door bottom. 7.2.1.1 Marvel Models and non-Overlay door Models (Standard Hinge and Pin Assembly) Remove the upper door pin with a 1/8” Allen wrench.
Remove the toe grill. NOTE: The communication cable is secured to the bottom of the door by the use of a p-clamp. It relieves in stress applied to the electrical disconnect. Communication cable disconnect on the bottom of door. The p-clamp is mounted on a post to accommodate hinge clearance. Disconnect communication connector and remove P-clamp and post.
Remove upper door pin. 7.2.2 Bottom Door Closer The bottom door closer can be replaced by loosening the screws on both the lower cabinet flange and the underside of the door. Remove screws to replace the door closer assembly.
7.3: Refrigerated Drawers 7.3.1: Drawer Removal 1. Disconnect user interface connection located at the top rear on the right hand side of the upper drawer. (No connections for bottom drawer). 2. Remove the screw on each on top front of each shelf rail (2 total). 3. Push the release rod forward; this will disengage the locking tab on the rear of each drawer rail. 4. The drawer can now be lifted and removed from the slide rails. Disconnect communication cable at right rear of upper drawer.
Push the gray drawer release, on each side, forward to unlock drawer tab. Locking tab shown in secure position. Drawer can now be lifted and removed.
7.4: Doors / Drawers Handle Adjustment Both the door and drawer handles are secured with a 3/32” hex set screw, on the underside of each standoff. 3/32” hex head. Snug or loosen the set screw firm. Do not over tighten. Once loosened, the handle can be pulled out of the standoff.
If the standoff is loose it can be tightened with a Phillips screwdriver. The head of the Phillips screw inside the standoff. Turn the screw clockwise to tighten. Replace handle stud into the standoff, turn clockwise with the Allen wrench, and snug hex screw finger tight.
7.5: Door Alignment /Adjustment: 1/8” hex head. Turn the screw counterclockwise to remove. 5/32” hex head. To adjust, loosen both screws (counterclockwise) on the bottom of the door. Slide the bracket right, left or diagonally to some degree to adjust door alignment. 7.6: Gasket Adjust / Replace: Press the gasket foot into the door channel to reseal. Use your thumb to work the gasket in place around the perimeter of the door.
7.7 Articulating Hinges: Articulating hinges are standard on Marvel Professional and panel ready doors. Professional and overlay door models cannot be installed free standing. Units with the Articulating Hinge must be installed as built-in due to safety constraints. Panel ready door shown with articulating hinges. NOTE: The top hinge is spring loaded and has the capability to suddenly close and severely pinching an appendage. Open Top Hinge: Outside View.
Open Top Hinge: Inside View. Loosen both screws, on top and bottom hinges to remove door. NOTE: Use caution with both the top and bottom hinges as they have the capability of severely pinching an appendage. The cable post is used only on articulating hinge doors. Its purpose is to keep the communication cable from being pinched by the hinge. The p-clamp, post and harness connector must be detached from the door to accommodate door removal.
Section 8: Evaporator Compartment Access To gain access to the evaporator compartment of the beverage center, wine cooler or refrigerated drawers are very similar but slightly unique. After drawers or shelving have been removed, the decorative plastic snap caps will have to be removed to access screw removal for both the cantilever brackets, coil cover, and thermistor shield. NOTE: Refrigerated Drawers: See Section 7.3.1: Drawer Removal for additional information.
Beverage Center: Exploded view of interior and shelving SEE Section 8.4 regarding the evaporator cover drip edge pertaining to all models Beverage center only: The cabinet thermistor will have to be removed from its shield to allow it to pass through the removed cantilever bracket.
8.2: Wine Coolers: Wine coolers have slide rail shelving with 7 pairs of slide rails on each side of the interior cabinet. 1. Remove all shelving. 2. Remove decorative plastic snap caps. a. The plastic cap located at the top center of the coil cover is hinged on one side; it is slightly larger than the remaining plastic decorative snap caps. 3. Remove screws around the perimeter of the coil cover. 4. Carefully remove the coil cover and disconnect the evaporator fan and thermistor wires as needed. 8.
4. The mullion trim strip has a small lip that rests under the cabinet flange. The fascia screw on each end of the mullion does not need to be removed. 5. To remove mullion: a. Grasp the mullion with each hand. b. Push mullion to the right to clear lip of flange on the left. c. Rotate mullion forward to clear the mullion from brackets and liner. d. Lift outward to remove. 6. Disconnect the LED harness on the right hand side of the mullion assembly. 7.
Remove two screws on the top of the mullion bracket, and one on the bottom. Mullion fascia trim does not have to be removed. Bottom mullion bracket. Wiring harness for the mullion LED. NOTE Disconnect. Side View of Mullion Assembly.
Remove the decorative screw caps and screws. Remove P-clamp 3 2 1 The coil cover can now be removed. The defrost thermistor is shown in photo (left-red). Also shown are disconnects for the following: (1) fan cable (2) communication cable and (3) defrost thermistor. 8.4: Evaporator Cover Drip Edge The bottom of the evaporator cover has two plastic drip edges to deflect water/condensation into the drain sump. These pieces need to remain on the cover for proper drainage.
Section 9: Wiring Diagram 9.1 Block Diagram of Main Power Board 9.1.1 Single Zone 9.1.
9.2 Schematic Diagram 9.2.
9.2.
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9.3 Main Power Board Identification 9.3.
9.3.
SECTION 10: Power on Reset Mode 10.1: Auto Self-Test Every “power on reset” (POR) will initiate an “auto self-test”. After each loss of power the control will do a self-check once power is restored. This sequence will not be noticeable to the owner. During the auto self-test mode, the following conditions are evident: Current temperature is displayed. Lights work normally. User can adjust the temperature set-points. Lock function works normally. ON/OFF key works normally.
10.3.1 SINGLE ZONE: LOAD Condenser (AUX A) Evaporator AUX C Comp & Cond Fan ONLY AUTO TEST MODE ENABLED On for 15 seconds then OFF. Pause 2 seconds On for 15 seconds then OFF. Pause 2 seconds On for 15 seconds then OFF. Pause 2 seconds On for 5 minutes then exit AUTO-TEST and RETURN to NORMAL OPERATION. NOTE: If there is a "Call for Cooling", upon return to normal operation, the compressor and condenser fan will remain enabled. 10.3.
SECTION 11: Quick Reference Troubleshooting Guide COMPLAINT CONDITION CAUSE ERROR CODES Compartment Thermistor: Open or shorted (no audible tone). Defrost Thermistor: Open or shorted (no audible tone). Multiple Thermistor Failures: Open or shorted (no audible tone). EL Ed EL / Ed Broken / Worn / Shorted thermistor: Check resistance (Ohm) and replace. Broken / Worn / Shorted thermistor: Check resistance (Ohm) and replace. Broken / Worn / Shorted thermistor: Check resistance (Ohm) and replace.
Section 12: Flow Chart Diagnostics 92
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Section 13: Service Data 13.1: PROGRAM PORT Programming or re-programming is accomplished through a port located behind the toe grill. Model specific, factory default settings cannot be modified or adjusted in the field. However, if a new software or firmware version becomes available it is possible to upload the latest version through this program port. 13.1.1: SERVICE DATA RETRIEVAL Historical data can be downloaded in a file format compatible with Microsoft® Excel through a PC USB port.
13.1.2: Service Data Port Location The service data cord will connect to the technician’s computer with a USB connection on one end and then into the appliance data port by means of a jack plug.
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Section 14: Beer Dispenser Caution Prior to preceding with any of the following steps the main power to the appliance and/or the power cord should be disconnected from the power supply. Failure to do so could result in severe shock. 14.1: Interior mechanical / electrical components The components are accessible as described in previous sections. Remove all interior beer dispenser accessories: keg, co2 tank, regulators, and lines.
Supply air louvers on the evaporator cover. Evaporator and thermistor location behind evaporator cover. Evaporator fan is secured to the rear of the evaporator cover. NOTE: Newer models made after 20150824xxxH also have a rear fan guard.
NOTE: As of mid-August 2015, a rear fan guard was added to the fan assemblies on beverage dispenser models. The fan guard is to eliminate the possibility of wires getting caught in the fan blade from behind the coil cover. The approximate serial number range is 20150824xxxH. This is an approximate date and some variation may be seen in the field. The following exploded view shows the assembly drawing of the coil cover components along with both the front and rear fan guards.
Remove the four screws from the front of the coil cover to remove either fan. 14.2: Main Control Board Access Caution Disconnect the main power supply to the appliance. Failure to do so could result in severe shock. 1. The main power board can be accessed as follows: Remove the front toe grill. Locate the control housing assembly. See below. Use a Phillips screwdriver and remove the two screws securing the control housing assembly to the machine compartment base.
To access the main power board; remove the toe grill. Control housing assembly: The main power board is located in the front, right hand side, behind grill (beer dispensers only). FOR REFERENCE: The bottom base assembly is shown to help identify component locations. The control housing assembly is circled in red.
Note the two Phillips screws securing the front of control housing assembly. Note the slot and tab positioning. 14.3: Machine Compartment Access to the machine compartment is standard on all Marvel models. The layout of the mechanical compartment is reconfigured due to the space constraints of maintaining the volume of the refrigerated space. See the Note below regarding the condenser fan. 14.3.
View of the machine compartment components with back panel removed. NOTE the location of the compressor, drain, condenser fan, and filter drier. NOTE: The condenser fan blade used for the beer dispenser is 3/4” smaller in diameter then the blade used on the remaining Aurora control models. The condenser motor can be replaced by releasing the disconnect plug and removing the nuts holding the mounting bracket to the base assembly.
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Section 15: Dual Zone 15.1: User Interface Control Refer to Section 5.4 of this manual for more specific control reference User Interface Display: Features dual compartment temperature set point option on display. 15.2: Operation TEMPERATURE CONTROL OF THE DUAL ZONE COMPARTMENTS Colder temperature is maintained per the SETPOINT for the lower compartment. Temperature is achieved and maintained by cycling the compressor on and off to reach the desired SETPOINT temperature.
louver openings. The warm air will be circulated throughout the upper cabinet through the upper circulation fan and return through the louvered opening at the bottom of the rear back panel. 15.3: Characteristics Upper Compartment: Temperature range is 55° to 62° F. Lower Compartment: Temperature range is 45° to 55° F.
15.4: Dual Zone Compartment Air Flow VIEW: Upper compartment with rear panel removed. Center divider is in place. VIEW: Styrofoam air channel insert. VIEW: Lower compartment with rear panel removed. Center divider is in place.
15.5: Divider Removal This procedure would be required for an evaporator replacement. Prior to removing the center divider the back cover to the upper compartment must be removed, and the wire harnesses disconnected. Mullion: Upper View Mullion Bottom View Remove both bottom and top screws on each side of mullion. The top screw must be removed so that the mullion face can be removed from the divider to obtain door clearance.
Remove the cover which isolates the electrical connectors. Disconnect wire connectors. NOTE: Each wire with a connector is labeled with a piece of shrink wrap tubing in regards to its termination point. Slide divider outward from cabinet.
15.6: Damper Operation The front damper is located in the font right hand side of the divider. The rear damper is located in the rear of the divider behind the back cover. Both damper positions are regulated by the need to cool or add heat into the upper (warmer) compartment. Front Damper – Upper View Rear Damper Front Damper – Bottom View It is recommended to remove the divider to access the rear damper.
Remove screw on each side of damper bracket. Cut the foam insulation on each side of damper bracket. Remove damper from bracket.
Rear View: Rear damper in the open position. Front View: Rear damper in the open position: NOTE the insulation on the back of the damper door. View from the Upper Compartment: The louvers on the back cover will be shut when the rear damper is in the open position. The insulation on the back of the damper door will close air from passing through. The photo shows the upper damper closed to the lower zone. This is the orientation of the damper for the upper zone once it reaches its set point.
15.7: Compartment Fan Operation Upper compartment; blows air out into the compartment, circulates supply air into the compartment. The blade rotates in a clockwise rotation as you face the hub. Lower compartment; draws air out of the compartment, return air is brought back into the evaporator compartment to be reconditioned. The blade rotates in a counterclockwise rotation as you face the hub.
15.8: Heater Operation The heater controls return air to circulate into the upper compartment to maintain desired set point temperature. A call for cooling in the upper (warmer) compartment opens both damper doors and disables the heater. A call for heat in the upper (warmer) compartment closes both damper doors and enables the heater. The heater is disabled when the ambient thermistor senses a temperature excessive to 85°F. o This prevents excessive compartment temperatures.
15.9: Thermistors All temperatures are monitored individually by 10K @ 25°C NTC sensors (thermistor). The dual zone has three thermistors, one for each compartment and a third mounted outside the unit to sense ambient temperatures. The ambient thermistor is located behind the toe grill and secured to the top of the machine compartment. It is centrally located in the condenser intake air. If the ambient thermistor senses a temperature above 85°F, the heater located in the upper compartment will be disabled.
Location of ambient thermistor is located behind the toe grill and secured to the top of the machine compartment, centrally located in the condenser intake air. 15.10: Evaporator Access To access the evaporator (lower compartment) remove the 4 screws securing the evaporator cover. Once the cover is removed the top of the cover can be lowered. At this time, reach behind the cover and disconnect the evaporator fan. The cover can now be removed from the compartment.
15.11: Interior LED’s This is a photo of the bottom compartment LED. It was taken after the divider was disassembled. It references the need to carefully finger tighten the bulb when replacing. No clips or backers are used for assembly. 15.12: Defrost / Drip Time When defrosting (dEF), the user interface display will appear as seen below: Defrost can be achieved either automatically or manually.
The defrost cycle is pre-programed into the main power board and is not adjustable. The factory default is 6 hours of accumulated run time and begins at the conclusion of the compressor on cycle. The beginning of the next defrost cycle starts after time expires from the previous defrost event. 15.12.1: Defrost Component Sequence 1. The heater cycles between on and off depending on the call for cooling load (unless ambient temperature exceeds 85°F). a.
5. The front damper remains open, to circulate air from the lower compartment to the upper compartment (Photo E). Damper Open The photo below shows water droplets starting to build up on the evaporator plate. NOTE: This photo does not represent a failure condition as it appears. Foam Spacer Foam Spacer 15.13: Refrigeration and Mechanical The basic refrigeration and mechanical operation and assembly are not unlike that discussed earlier in this manual. This information can be reviewed in chapters 3 and 4.
Section 16: Refrigerator Freezers 16.1: User Interface Control User Interface Display: Features dual compartment (refrigerator and freezer) temperature set point option on the display. 16.2: Operation TEMPERATURE CONTROL OF THE REFRIGERATOR AND FREEZER COMPARTMENTS The Aurora Intuit control regulates the refrigerator and freezer compartment temperatures separately. Freezer temperatures are monitored by a thermistor located on the upper left hand side of the tempered compartment.
motorized damper; this damper is located on the bottom rear wall separating the freezer and refrigerator compartments. When the refrigerator compartment thermistor senses temperatures above the “Refrigerator Set Point” on the user interface, the damper will open. The open damper allows for cold air to be circulated from the evaporator, through the freezer door, into the refrigerator, and back through the damper to satisfy the need for cooling.
ACCESSING THE EVAPORTOR COMPARTMENT To access to the freezer / evaporator compartment, first remove the freezer door and frame assembly. This will total 6 screws, 5 on the inside perimeter of the door frame, another on the inside upper left hand corner. 16.4: Damper Operation 12VDC / bi-polar stepper motor 16.4.1: Damper Access Warmer compartment temperature is maintained by opening and closing the damper in conjunction of the 300 watt heater.
Air transfer damper is located behind this louver cover. AIR FLOW To access the damper, remove all three screws from the cover face. The damper can be grasped and pulled out of the opening. Disconnect the wire connector to replace.
16.5: Fan Operation 16.5.1: Refrigerator Supply Fan 6-13.8 VDC The refrigerator fan is located underneath the freezer compartment in the left rear corner. AIR FLOW 1 AIR FLOW 2 To replace the fan, drop the fan shroud, disconnect the wire connector (1) and remove all four screws (2) where the fan grill, shroud and fan are assembled. The bottom of the fan assembly is open to recirculated air from the compartment. The air is then pushed out into the compartment through the fan blade.
16.5.2: Freezer Supply Fan 6-13.8 VDC Supply Air Fan: Circulates tempered air into the freezer compartment. AIR FLOW AIR FLOW Supply air is transferred from the freezer into the refrigerator section through the slot in the freezer door. Louvers in the bottom of the evaporator cover accommodate return air back to the evaporator compartment. AIR FLOW 137 To replace this fan motor, remove all four screws holding the grill and the motor to the evaporator cover.
16.6: Thermistors 16.6.1: Type NTC, 10K @ 25°C, same as discussed in Section 6 of this manual; Use the same resistance charts located in Section 6.4. 16.6.2: Location The freezer compartment thermistor is mounted on the upper left hand wall of the freezer side wall. The defrost thermistor is mounted on the evaporator outlet. The evaporator is located behind the freezer compartment. The refrigerator compartment thermistor is mounted on the mid wall on the right hand side of the refrigeration section.
This view shows the thermistor bulb nested inside the shield. 16.7: Refrigeration and Mechanical The basic refrigeration and mechanical operation and assembly are not unlike that discussed earlier in this manual. This information can be reviewed in Chapters 3 and 4. The freezer partition can easily be removed for access to the evaporator section. Remove the three screws from the taps (2 on the top vertical and 1 on the left horizontal corner) where they are screwed into the cabinet.
16.8: Evaporator 16.8.1: Type Fin and Tube. 16.8.2: Location Located behind the freezer compartment.
16.9: Defrost When defrosting (dEF), the user interface display will appear as seen below: Defrost can be achieved either automatically or manually. A manual defrost can be activated by holding the minus and lock keys simultaneously for a period of three seconds. Once defrost is activated the Use Interface will flash “dEF” three times before showing an uninterrupted “dEF”. More information is available in Section 5.
16.9.2: Defrost Heater The defrost heater has a 300 watt rating. The heater extends down the side and bottom of the fin and tube evaporator. The primary heater will cut out at 45°F. 16.9.3: Defrost Thermistor A defrost cut off thermistor acts as the primary method to terminate the defrost event. It is attached to the copper inlet tube of the evaporator. The thermistor will terminate defrost at 45°F. 16.9.
16.10.1: Defrost Heater To replace defrost heater, unplug the connections. Locate defrost heater connections. Remove the mastic evaporator spacers.
Remove the tin tie wraps that secure the heater next to the evaporator. Slide the drip pan down away from the evaporator. 16.10.2: Defrost Termination Thermostat The Termination thermostat is located on the evaporator outlet. The Defrost Thermistor is located on the evaporator inlet. 16.10.3: Defrost Thermistor Also seen in the above picture; the thermistor is attached to the evaporator inlet and secured with a nylon zip tie.
16.11: RFI (Refrigerator Freezer- Ice Maker) Freezer compartment: Includes an ice bucket and an ice maker with a fan in the upper rear corner. This diagram represents the position of the ice machine level to turn the ice maker ON or OFF. Lever Up: Ice Maker “OFF” Lever Down: Ice Maker “ON” 16.11.1: Ice Maker To remove the ice maker cover; insert a screwdriver into the bottom notch and lightly pry open. 16.11.1.1: Specs: 115 Volt/60 hertz Heater: 165 Watts / 80 Ohms Thermostat: Open @ 48°F (8.
Fill Adjustment Ice maker with the cover removed. Adjusting the water fill can be accomplished by turning the adjustment screw clockwise (+) to increase or counter clockwise (-) to decrease. The motor gear is the small gear on the top left. The timing gear is the largest gear in the center. 16.11.1.2: Ice Maker Test Cycling Test cycling of the ice maker can be achieved by turning the motor gear counter-clockwise until the holding switch circuit is complete.
16.11.2: Ice Maker Removal To remove the crescent ice maker, the screws located inside the two upper mounting brackets need to be loosened. There is no need to remove these screws. A third screw on the bottom font of the ice maker body needs to be completely removed. Lift the ice maker from the bottom and set the ice maker aside. This will expose the wire harness and water fill tube. Remove the black wire grommet on the rear of the freezer cover. This will expose the connector for the ice maker harness.
16.11.3: Ice Maker Kit Model RF (without icemaker) can have an AGA Marvel factory authorized Icemaker kit installed. The part number for the AGA Marvel ice maker kit is S42418151-CLR. This kit can be obtained through the AGA Marvel order desk. Call 1-800-223-3900 and follow the phone queue to the order department.
16.11.3.1: Ice Maker Kit Installation Instructions: Follow specific instructions included in kit. Remove rear panel to machine compartment. Connect wire harness inside of machine compartment to water valve. Attach water valve to rear cabinet flange. Replace cover to machine compartment.
Remove access cover in top rear, right hand corner. Remove insulation under cover and keep for use later. Water (fill) tube Water line with compression fitting Compression nut P clamp Insert fill tube; connect water line and compression nut. Secure fill tube with screws.
Replace insulation and access cover. Remove three plastic screw plugs on left hand side wall in freezer compartment. Install screws into the top two holes; leave room to set the ice maker into place on top of screws.
This photo shows the ice maker connection located in the evaporator compartment. Place the plug bushing over the ice maker wire harness; smooth surface facing outward. Push and snap the wire connector into place. Push the plug bushing into the rear cover panel.
Set the Ice maker on top of each of the (two) top screws and tighten. Install the bottom screw into the bottom ice maker bracket and tighten.
Supply water inlet: ¼” compression nut with coupling. Install water supply line to the water valve, seat coupling and tighten the compression nut to the water valve. Check for water leaks once supply water is reconnected.
16.11.3.
Section 17: Outdoor Models 17.1: Operation Dynamic cooling utilizing a forced air condenser and interior circulation fans moves air effectively and efficiently. The Prime control system brings the control interface display inboard where it will not be affected by the elements of the outdoors. The main control board is located in the machine compartment. It is shielded by a mylar curtain behind the compartment access cover, this also protects from the elements of the outdoors.
This exploded view drawing shows the front and rear fan guard. As mentioned on the previous page, the additional rear fan guard was added to outdoor beverage centers and beverage dispensers to prevent wire interference. 17.4: Thermistors Thermistors are still NTC and located on the midway point of either the left or right hand side of the cabinet liner. A defrost thermistor is also attached to the upper left hand evaporator plate (Refer to Section 6).
17.5: Control Type The Prime control is used in all outdoor applications. It is the same basic control as the previously used Micro Sentry controls; however the control is reduced considerably in depth and appears identical to the control used in the previous door mounted versions in the Marvel Scientific models. 17.6 : Control Functions The following is an excerpt from the customer Owners Guide regarding general control usage.
17.7: Control Locations per Model 17.7.1: Beverage Centers and Beverage Dispensers (6 cu. ft.) 17.7.2: Beverage Center (3 cu. ft.) 17.7.3: Refrigerator Drawer Location: Upper Right Hand corner of the top drawer.
17.8: Machine Compartment Mylar rain curtain on all outdoor under counter products. The basic machine compartment and mechanical assembly is nearly identical as discussed in Section 3, seen earlier in this manual. 17.9: Main Power Board Access The main power board location is on the left hand side of the machine compartment. Visual of the main control board attached to its mounting bracket with all wire harnesses connected.
12 VDC Power Supply – Serves the evaporator fan. Located on rear side of the main power board bracket. 17.10: Display Access and Replacement 17.10.1: 3 Cubic Beverage Centers To access the control, remove the two screws on the bottom housing flange. These screws also secure the fan grill and motor to the evaporator cover. After removing the screws, grasp the control and pull away from the evaporator cover.
The control can be removed by depressing the four locking tabs (2 on each side) on the control body, with the end of a small screw driver. A small screw driver is used to release the locking tabs on the control from the control housing. The control can now be removed through the front of the housing.
17.10.2: 6 Cubic Foot (Beverage Centers and Dispensers) Rear view Front view To remove the control: Insert your fingers on the top of the control and press downward. This will release the two bottom tabs. Pull the top of the control outward from the evaporator cover. Tab release: Two tabs are located on the top and two on the bottom on the control. Disconnect the wire harness from the control by pressing the release tab on the outside of the connector.
17.10.3: 6 Cubic Foot (Refrigerated Drawers) On Refrigerated Drawers: Follow the steps below. Two mounting screws are located on the bottom flange of the control housing. To access the control, remove the two screws on the bottom housing flange. Grasp the control and pull away from the drawer. To disconnect, press the release tab on the side of the wire connector and remove the communication cable. Locking tabs, push to release.
The control can be removed by depressing the four locking tabs (2 on each side) of the control body, with the end of a small screw driver. This will allow the control to be removed from the front of the housing. Locking tabs, push to release.
17.11: Thermistor Resistance Temperatures are monitored individually by 10K @ 25°C NTC sensors. This is a reduced version of the resistance chart seen in Section 6.4 °C -15 -10 -5 0 5 10 15 20 25 30 35 40 45 °F 5 14 23 32 41 50 59 68 77 86 95 104 113 17.12: Wiring Diagram 166 K- Ohms 5.365 4.251 3.389 2.722 2.202 1.793 1.467 1.208 1 0.8315 0.6948 0.5834 0.
17.13: Generic Trouble shooting Charts The following charts are offered for reference only and are not comprehensive diagnostic charts. NOTE: Any page numbers referenced on these charts are referring to the Customers Owners Guide NOT this Service Manual. 17.13.
17.13.2: Beverage Centers 17.14: Refrigeration and Mechanical The basic refrigeration and mechanical operation and assembly are not unlike that discussed earlier in this manual. This information can be reviewed in Chapters 3 and 4. The basic machine compartment and mechanical layout is nearly identical as discussed in Section 3 seen earlier in this manual.
Section 18: Prime Control 18.1: Control Type The prime control still utilizes the top mounted control housing as seen in the picture below. It is the same basic control as the previously used Micro Sentry controls; however the control is reduced considerably in depth and appears identical to the control used in the previous door mounted versions in the Marvel Scientific models and the current Outdoor Models.
Access the control housing by loosening the two recessed screws in the front edge of the housing and one screw in the rear flange of the housing. Slide the housing forward and let it carefully drop away.
18.2: Control Functions The following is an excerpt from the customer Owners Guide regarding general control usage.
18.3: Fans Fan function and location is not unlike the indoor Marvel and Marvel Pro models. Air is drawn across the evaporator plate from the supply louvers and outward into the interior cabinet through the circulation fan. The blades rotate in a clockwise direction as you face the hub. 18.4: Thermistors Thermistors are still NTC and located on the midway point of either the left or right hand side of the cabinet liner.
18.5: Machine Compartment Main Power Board – Located in the left hand side of machine compartment. Visual of the main control board attached to its mounting bracket with all wire harnesses connected. 12 VDC Power Supply – Serves the evaporator fan. The power supply is located on the rear side of the main power board bracket.
18.6: Thermistor Resistance Temperatures are monitored individually by 10K @ 25°C NTC sensors. This is a reduced version of the resistance chart seen in Section 6.4. °C -15 -10 -5 0 5 10 15 20 25 30 35 40 45 °F 5 14 23 32 41 50 59 68 77 86 95 104 113 18.7: Wiring Diagram 174 K- Ohms 5.365 4.251 3.389 2.722 2.202 1.793 1.467 1.208 1 0.8315 0.6948 0.5834 0.
18.8: Generic Trouble shooting Chart The following charts are offered for reference only and are not comprehensive diagnostic charts. NOTE: Any page numbers referenced on these charts are referring to the Customers Owners Guide NOT this Service Manual. 18.9: Refrigeration and Mechanical The basic refrigeration and mechanical operation and assembly are not unlike that discussed earlier in this manual. This information can be reviewed in Chapters 3 and 4.
Section 19: Clear Ice Machines 19.
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19.2: Control System 19.2.1 The User Interface: The User Interface display is mounted to the door top and connected to the main power board by means of a communication cable. The cable extends through the door and exits at the bottom hinge location. 19.2.1.1 Removing the User Interface Display CAUTION It is recommended that a grounding strap be used when working with any solid state control board application.
Place finger nails under left hand lip of user interface display. Lift upwards. Lift user interface away from door receiver. Release locking tab on display connector. User Interface PCA Terminal Description J1 Com Cable to Main Board J2 ICON / Key Switch The user interface can now be removed.
19.2.1.2 Installing a new User Interface Display 1. Reverse the process used to remove the display board. 2. Carefully place the display back into the door receiver. Apply a light downward pressure to the edge of the display to snap into place.
19.2.2 Main Control Board: WARNING Prior to removing the access cover to the machine compartment, disconnect the supply voltage to the appliance. Failure to do this could result in an electrical shock or possible death. CAUTION It is recommended that a grounding strap be used when working with any solid state control board application. 19.2.2.1 Control Board Replacement 1. The main power board is located at the bottom, right hand, front corner of the machine compartment. 2.
Location of the main power board. Remove screw holding the control board bracket in place.
Center mullion restricts ease of main power board access. Remove bottom left hand screw from lower hinge. Remove single screw on opposite end of mullion.
Mullion bar removed from the cabinet. Tip board at a 90° angle and disconnect the two large white connectors from the power board. Rotate the board as needed to disconnect the remaining cables from the control board. All disconnects have a quick release tab on the connector . Example: Clip release on side of terminal disconnects. Press to release. A click will be heard when disengaged from control board.
These two photos show both the mounting tabs on the bottom of the main control board bracket and the positioning slots on the adjoining mounting bracket inside the machine compartment. 19.2.2.3 Control Board Terminal Identification NOTE: For wiring diagram and schematic, please refer to section 19.8. The following pictures represent terminal identification on a single zone main power board.
View of main power board. See wiring diagram and schematic included in this section. Connectors J3 – J5 (right to left): See wiring diagram and schematic included in this section. Connectors J6 & J7: (left to right): See wiring diagram and schematic included in this section.
Connectors J1 and J7: See wiring diagram and schematic included in section 19.8. EXPLODED VIEW: Of the control housing assembly. 19.2.2.4 Control Board Installation 1. The main board mounting bracket and the control housing are manufactured for a positive fit upon installation. a. The rear of the control bracket has two tabs to ensure a positive mounting position. b. The rear of the control housing has two accommodating slots to accept the mounting tabs on the control board bracket. c.
2. Replace all previously removed wiring connectors to the correct location on the main board. 3. Prior to reinstalling the control board, verify that the slotted tabs on the rear of the control mounting board glide into their adjoining locator slots on the control housing. 4. Slide the assembly into position and secure with the 5/16” sheet metal screw. 5. Replace the center mullion, lower access panel, toe grill, and door.
19.2.3.4 Removing the Bin Thermistor 1. Remove both the upper and lower access covers on the rear of the ice machine. 2. The base assembly can be slid out 8-10” to help this conversion. (See Section 5 for guidance). 3. Remove the permagum and foam insulation out of the rear bun hole where the thermistor is routed inside to out. 4. Disconnect the bad thermistor at the main power board connector plug. 5. Remove the two screws holding the bin thermistor shield. 6. Remove the thermistor bulb from the shield. 7.
Bin sensor location. 19.2.3.6 Removing the High Side Thermistor 1. The base assembly can be slid out 8-10” to help this conversion. (see section 5 for guidance). Remove both the upper and lower access covers on the rear of the ice machine to gain access. 2. Locate the thermistor connected to the liquid line at the filter drier inlet. 3. Cut the nylon zip tie holding the thermistor to the evaporator plate. 4. Disconnect the bad thermistor at the main power board connector plug and remove.
2. Feed the thermistor through the machine compartment and attach the connector to the corresponding terminal on the main power board. 3. Reassemble the base and access covers in reverse order as they were removed. High side thermistor location: The thermistor is located on top of the filter drier inlet (located behind the fill valve). The water valve will have to be removed for access. High side thermistor location: The thermistor is fastened to the liquid line at the filter drier with a nylon wire tie.
19.2.
19.2.5 Door Sensor: The door sensor is located on the bottom cabinet flange; approximately one third of the distance away from the handle side of the cabinet. The door sensor is resistance activated by the pressure of the door gasket. Light functionality and the door alarm are directly related to this switch. Door sensor location. Sensor disconnect terminal.
19.2.5.1 Door Sensor Removal 1. Remove the toe grill. 2. Disconnect the door sensor at the harness terminal behind the trim piece. See photo. 3. Remove the door sensor from the cabinet by starting in one of the upper corners and peeling in a downward motion. 4. Once the sensor has been removed from the flange area: a. Grasp the sensor with the right hand using the thumb and forefinger. b. Grasp the electrical strip portion of the sensor between the thumb and forefinger on the right hand. 5.
19.2.5.2 Door Sensor Replacement 1. Do not remove the adhesive backing from sensor until it is in place. 2. Slide the new sensor into the gap between the bottom flange and trim piece. 3. Once the sensor is in place: a. Remove the adhesive backer from sensor. b. Ensure the sensor is in position and carefully adhere to the cabinet. Apply carefully using thumb pressure to the outer perimeter of the door sensor. c.
19.3: Interior Features 19.3.1 Escutcheon Cover: To Remove the Cover: Grasp the bottom of the cover with both hands and pull outward. To Replace the Cover: Align the top of the cover to the top center mounting peg. Lightly tap with the side of your fist, or push firmly into place. The sides of the cover can now be pushed into place. Escutcheon mounting pegs (3) Note: The notched escutcheon cover and rubber mounting pegs. The cover will be secured, once placed and pushed over the rubber mounting pegs.
19.3.2 LED Lighting: One LED light is located on the front side of the lower bin. The LED lighting is controlled by the door switch mounted on the bottom flange of the cabinet. Pressure from the door gasket makes and breaks the door switch circuitry to control light function with door openings and closings. Additional lighting features can be reviewed in the controls operation section in this manual. 19.3.2.1 Replacing the LED Light 1.
19.3.3 Grid Cutter: The grid cutter installed. NOTE: the water deflection shield over the rear and the ice deflector installed below the grid cutter. The grid cutter removed: NOTE: Care must be taken when handling the grid cutter. One broken wire will disable the entire grid. To enable the grid cutter the grounded power plug needs to be connected at the receptacle located on the mid side wall of the machine above the grid.
19.3.4 Water Deflection Shield: The water shield is slotted and suspended by the two hooks mounted at the rear top of the ice machine. The shield helps prevent spray from the distributor tube from extending outward. 19.3.5 Water Distributor Tube: The distribution tube is located above the evaporator plate and is held in place with the two black rubber plugs that are inserted into each end and placed into the holes on each end of the evaporator plate. NOTE: the proper installation of the distributor tube.
19.3.6 Water Fill Tube: ¼” nylon fill tube, from water valve Bin thermistor cable 19.3.7 Ice Deflector: Plastic deflector plate; has two tabs (see below) located on the front and rear of each end to secure into side walls of cabinet. To remove the plate; press down on the center of the plate to disengage from the locator holes.
19.3.8 Circulation Pump and Water Reservoir: To access the circulation pump, fill tube, water line, water reservoir, or thermistor: Remove the two Philips screws securing the water reservoir to the side walls. The reservoir can now be removed by lifting off the bottom drain extension. Bottom View of Reservoir To replace the circulation pump: Unplug the pump from the back wall. Remove the two Philips screws securing the bracket to the back wall.
19.3.9 Recirculation Barrier: Air recirculation barrier mounted vertically on the bottom of the inside door panel. This allows additional intake air flow into the condenser. Air louvers to supply additional intake air to the condenser.
19.3.
19.4: Machine Compartment Components 19.4.1 Toe Grill Removal: 1. Remove both Phillips screws on each end of the toe grill. 2. There is an oval spacer held in place by each screw, located behind the toe grill. This is to improve the aesthetic appearance once the grill is adjusted and tightened. Remove each Phillip screw on both ends of the toe grill. Right and left hand views of the toe grill, screw and spacer.
Remove each Phillip screw on each side of the louvered access panel to gain additional access. NOTE: When reinstalling the toe grill care must be taken to be sure that the communication cable is routed through the correct area in the toe grill. The below left hand photo shows the correct routing of the communication cable, it must pass freely with clearance on all sides. The below right hand photo shows the incorrect routing of the communication cable.
19.4.2 Warnings and Cautions: WARNING Prior to removing the access cover to the machine compartment, disconnect the supply voltage to the appliance. Failure to do this could result in an electrical shock or possible death. CAUTION All electrical parts and wiring must be shielded from torch flame. DO NOT allow torch to touch insulation; the insulation will char at 200°F and flash ignite (burn) at 500°F. Excessive heat will distort the plastic liner. 19.4.
FRONT OF ICE MACHINE Remove both top and bottom screws on each side. REAR OF ICE MACHINE Remove all perimeter 5/16”screws from the access panel of the lower machine compartment.– DO NOT remove the 5/16” screws in the bottom left and right hand side corners, or the Philips head ground screws.
Remove corner screw on each side of rear cabinet. Before the mechanical assembly can be slid outward the following components must be disconnected and removed. Water fill valve Drain valve Drain “Y” connector Drain pump 19.4.4 Water Fill Valve: To remove the water valve, disconnect: Wiring harness on solenoid. Water connection on bottom of valve. Remove both 5/16” sheet metal screws securing the valve bracket to the side flange of the machine compartment.
19.4.5 Drain Valve: To remove the drain valve, disconnect: Wiring harness on the solenoid. The two hose clamps. One on the top of the valve body and the second on the side of the valve body where it connects to the “Y” connector. Remove both Philips sheet metal screws securing the valve bracket to the top of the machine compartment. Remove the valve body from the two drain hose connections. 19.4.
Mechanical assembly completely unsoldered and removed from under the cabinet. 19.4.
19.4.8 Compressor: The following tests should be conducted before concluding the compressor is faulty. 1. Low and high side pressure, temperature of compressor, discharge and suction lines, temperature of air leaving the evaporator compartment, temperature of condenser coil, condenser fan operation, and amp draw at compressor. 2. Use a compressor start cord to isolate and test the compressor. 3. Use an ohmmeter to measure resistance / continuity at the compressor to check for shorted or grounded windings.
19.4.8.1 Check Compressor Winding Resistance: 19.4.8.2 Compressor Removal 1. Disconnect power to the unit. 2. Follow the exact steps outlined in “Sealed System Components” to access the compressor. 3. Using the process tubes, install sealed system access valves and recover refrigerant. 4. Remove the TSD2 starter package from the compressor terminals. 5. Unsolder and remove the discharge and suction lines from the compressor. 6. Unsolder and remove the filter / drier. 7.
8. Solder a new process tube to compressor. 9. Solder the discharge and suction lines back into compressor. 10. Re-install TSD2 starter package to compressor terminals. 11. Connect service ports to both the high and low sides of system. 12. Evacuate, charge to serial plate recommendation, and leak check the sealed system. 13. Push the mechanical base assembly back into place. 14. Secure base assembly to cabinet at rear and front locations. 15. Replace the front grill and back panel. 19.4.
Remove both upper and lower, rear access panels. Disconnect the door sensor switch. Remove the toe grill and access panel from the front of the machine. Remove screws from all four corners that secure the cabinet assembly to the base assembly. Remove these following components: i. Fill valve, drain valve, “Y” drain connection, and door sensor switch. 5. Install sealed system access valves and recover refrigerant. 6.
Remove the 3/8” nut and star washer. This 3/8”nut and star washer should not have to be removed. The condenser will slide in and out of this bracket. 19.4.9.2 Condenser Installation 1. Reattach the condenser to the two mounting brackets. 2. Ensure that the carriage bolts for mounting the condenser brackets are in place on the bottom of the machine compartment. 3. Install and solder the discharge and liquid lines to condenser. 4. Carefully slide the base assembly back in place. 5.
19.4.10 Evaporator: The evaporator removes heat from water cascading over the plate, ultimately making a full bin of ice within 24 hours (undisturbed cycle). The evaporator plate is “U” shaped in appearance and is installed in the top section of the ice machine behind the escutcheon cover. (4) Philips pan head screws, 2 on each side, front and rear of the evaporator flange. 19.4.10.1 Evaporator Removal 1. 2. 3. 4. 5. 6. Disconnect power to the unit. Remove both rear top and bottom access panels.
Suction line disconnect Hot gas line disconnect 19.4.10.2 Evaporator Installation Evaporator heat exchanger assembly 1. Straighten out the tubing on the new assembly so that it can be installed. 2. Slide the tubing inside the ice machine and outward through the bun hole. 3. Bend the suction tubing outside the machine by thumb, taking care not to kink the lines. 4. Carefully extend the tubing down the back of the machine and route tubing as was the previous assembly. 5. Install a new filter drier. 6.
9. Leak check, pull a satisfactory vacuum, and recharge with R134A according to the data on the serial plate. 10. Carefully slide the machine back into place and reconnect all components removed from the outside of the machine. 11. Carefully reassemble the interior components removed. 12. Check drain to ensure it is not compromised. 13. Turn on the water supply to make ice. 19.4.11 Interior Components - Exploded View: 4 5 3 1 2 To access the evaporator plate, first remove the following: 1. 2. 3. 4. 5.
19.4.12 Hot Gas Valve (HGV): Hot gas valve is located on the rear of the condenser shroud. Hot gas valve disconnect is shown in photo. The hot gas valve is secured with two 5/16” sheet metal screws.
19.4.
19.4.14 Condenser Fan: The condenser fan is used to force air over the condenser coil. The condenser fan cycles on and off simultaneously at intervals during the production and harvest cycles. 1. Make sure that the motor shaft turns freely. The blade can be turned in either direction to verify that the shaft is not ceased or the blade binding. Watch the blade and listen for any noise that might indicate a problem. 2. Check resistance between the terminals of the motor’s power cord.
19.4.14.3 Fan Assembly Installation 1. Re-install the fan motor in reverse order that it was removed. 19.4.14.4 Condenser Fan Blade Spacing If the condenser fan blade has been removed from the motor shaft the fan blade must be properly re-spaced to achieve the optimal performance from the condenser. The correct distance from the tip of the fan shaft to the top surface of the fan blade hub is 1/4” (.
19.4.15 Drain Pump: The drain pump sits at the rear, left hand side of the machine compartment base assembly. Pumping capacity is rated at a maximum of: an 8’ vertical lift and a 20’ horizontal run. Any use of a non-manufactures approved drain pump will void the consumer’s warranty. The white connector at the drain pump connects the appliance to the supply voltage receptacle. The black power plug on the pump connects to the main power board.
19.4.15.1 Drain Pump Tube Routing 123- 1) Pump Inlet, from bin/reservoir. 2) Pump outlet, has a maximum limit of 8’ vertical lift and 20’ horizontal run. 3) Pump vent, must be attached vertically to the rear of the cabinet. NOTE: The ice machine and drain pump need to be winterized once temperatures drop below 40°F to avoid damage caused by water freezing in the water system. Water needs to be drained and lines need to be blown out to preserve the appliance through the cold months.
19.4.15.
19.4.15.
19.5: Diagnostic Test Modes 19.5.1 Power on Reset (POR) Auto Test Mode: Every “power on reset” (POR) will initiate with an “auto self-test”. The user interface display will simulate normal operating conditions during the auto self-test. This auto self-test mode will initiate at the beginning of the initial appliance start-up and after power is restored after every loss of power that might occur due to customer or supply voltage reasons.
This control operates on a timed cycle event. The control performs a “Power on Reset” test at the beginning of each power up event (initial startup, after loss of power, etc.). Each individual component is tested prior to the harvest cycle. The harvest cycle current timing is 5 minutes; production cycle is 45 minutes at a 55°F ambient. An additional 45 seconds are added for each degree the condenser outlet temperature rises over 55°F.
19.6: Diagnostic Charts 19.6.
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19.6.6 Clean Cycle: NOTE: It takes 26 weeks of total accumulated compressor run time to activate the next defrost period.
19.7: Trouble Shooting 19.7.1 Ice Machine Operation: 19.7.1.1 Ice Machine does not operate: 1. Is the machine power cord plugged in? 2. Is the electronic control showing the “ICE” position? 3. Is a fuse blown or breaker tripped? 4. Is the room temperature cooler than normal? a. Minimum room temperature for an ice machine to operate efficiently is 55°F (13°C). The bin sensor may sense a full bin condition and prevent the ice machine from going into a production mode. 5.
19.7.3 Ice Quality: 19.7.3.1 Odor, greyish color, or off- tasting 1. Check for mineral scale build up on the evaporator plate. a. Initiate a clean cycle with a recommended nickel-free cleaner. 2. Does the supply water have a high mineral content? a. Installation of a water filter in the supply line is recommended. 3. Are any food types (or items) stored in the ice bin? a. If so remove them. 19.7.3.2 Ice Clumps 1. Look for clumps of ice in the bin. a.
Supply voltage to the ice machine will be interrupted if the drain pump becomes full. 19.7.6 The Drain Pump is Inoperative: 1. Verify that the power cord is connected at the pump (2 locations) and the main power board. 2. Look for possible restrictions in drain lines. 3. Ensure that the vent line is clear and able to breathe. 4. Not enough water to turn pump on. a. At least 1 quart (.95 liters) of water is needed to activate the pump. 19.7.7 The Drain Pump runs but not pumping: 1.
19.8: VAC Wiring Diagram and Schematics 19.8.1 Block Diagram of Main Power Board: 19.8.
19.8.
19.9: Specifications: 19.9.1 Ice Machine Components: 19.9.1.1 Compressor: Condenser: Transformer: Water Valve: Drain Valve: Circulation Pump: LED Lights: 19.9.1.2 Output Loads (120V/60Hz) Embraco EMY70 Panasonic FDQR107S2LNM Basler 120V, 0.24A / 12V, 25VA Horton S30 120V, 12W Horton S90 120V Beckett 120V, 220mA 12VDC, 350mA, constant current LED driver Input Loads Bin Temperature Sensor (thermistor): High Side Temperature Sensor (thermistor): NTC/ 10K@25C NTC/10K@25C 19.9.
19.10: Production and Harvest Guidelines 19.10.1 Harvest Cycle: 1. 2. 3. 4. 5. 6. During “Harvest” time; the circulation pump and condenser fan outputs are disabled. The compressor, hot gas, and drain valves are enabled. The drain valve will remain enabled for 60 seconds before becoming disabled. The fill valve will be enabled for 150 seconds before becoming disabled. The compressor remains enabled. All loads will remain in this state until the end of the harvest time (beginning of next production time).
19.10.4 Ambient Temperature Compensation: A high ambient temperature or restricted condenser air flow will have a negative effect on ice production. The high side thermistor placed on the liquid line directly reacts to changes in system temperatures due to changing ambient conditions. To compensate, the main power board is programmed to add or subtract to the production time for every 1°F ambient temperature change sensed at the condenser location.
Section 20: Service Kits/Bulletins 20.1: Service Bulletin # 41013862 Mullion Condensation on Refrigerated Drawers Mullion Heater Kits - Installation Instructions: Part numbers: S42413105-BLK for Marvel models and S42418081-BLK for Marvel Professional models (with lock). CAUTION: The appliance must be disconnected from its power source prior to preforming this repair. Mullion Heater Kit components: See page 107 for component details. Note the adhesive heater on rear of painted mullion panel.
LED light and mullion heater harness connections. Accessing the Mullion Remove the Drawers (See Section 7.3) Remove the Mullion as follows: Remove the two top sheet metal screws securing the right hand mullion bracket to the cabinet. Loosen the rear screw. The mullion bracket will stay with the mullion when it is removed. Remove the sheet metal screws on the top and bottom of the left hand mullion bracket. The mullion bracket will stay attached to the cabinet.
Pull mullion carefully away from cabinet. Disconnect the LED light connecter (white wires extended from mullion to the cabinet liner). Pull the yellow and black mullion heater wire out from inside the cabinet liner. Prior to installing the new mullion assembly, center the black painted strip over the plastic mullion. Use a piece of tape on each end to temporarily hold the assembly together.
Attach the right hand mounting bracket to the new mullion assembly. Connect both the light and heater wires from the mullion assembly to the wires leading from the cabinet. Feed the remaining light and heater harnesses into the mullion assembly.
Carefully align both ends of the assembly with the cabinet bracket locations. This will fit firm. Take care not to pinch the LED and heater wire harness, press both ends of the assembly into place. Replace all screws on each end of the bracket and cabinet. Secure the mullion assembly using the black head screws. Use one screw on each end of mullion, the screw will self-tap into the assembly.
Accessing the Machine Compartment Remove the lower back access panel (See Section 3.3) Disassemble the following components as noted. Locate and remove the Phillip’s head screw which secures the control board bracket to the cabinet frame. Disconnect the power connector at the bottom, left rear of the control board. See below photo for reference. FOR REFERENCE: Top View of power connector on main board.
Kit Components Harness B 1 Harness A 4 5 6 2 3 Harness A Connector 1 (Black and White Wires) Connector 2 (Black and White Wires) Connector 3 (Black and White Wires) Harness B Connector 4 (Red and Black) power supply Connector 5 (Yellow and Red) Connector 6 (Black and Yellow) mullion heater Installing the wiring harness NOTE: Use the photo on page 8 to reference wire harness and connectors below.
NOTE: See the following photos for reference. Wiring Harness A 1. Locate and remove the Phillip’s head screw which secures the main power board mounting bracket to the cabinet frame. 2. Remove the power connector at the bottom, left rear of the main power board (see above photo). 3. Plug connector “1” on harness A into the POWER terminal on the main power board. 4. Attach the original connector previously removed from the POWER terminal to connector “2” on harness A. 5.
View of wiring harness A with connectors “1” and “2” Connector “1” Connector “2” Connect the black and white wires from connector 3 (harness A) and the black and red wires from connector 4 (harness B) to the appropriate terminals on the power supply. Place the power supply between the main power board and condenser fan as far forward as possible.
Note the location of the black and yellow mullion heater harness in the machine compartment. The red and yellow wires at connector 5 (harness B) will plug into the “Aux C” terminal on the main power board. The rear panel and drawers can now be replaced. The unit can now be reinstalled back into position and voltage reconnected to the unit. The mullion heater is active 100% of the time.
20.2: SERVICE BULLETIN # 41013861 EVAPORATOR REPLACEMENT KIT* *THIS KIT DOES NOT FIT THE RF / RFI MODELS, SEE THAT BULLETIN LATER IN THIS SECTION Part number: 42249115, Evaporator Kit with Installation Instructions REFER TO SECTION 3.6 FOR ADDITIONAL DISASSEMBLY INFORMATION Reclaim Refrigerant from Sealed System Reclaim the refrigerant in the sealed system per EPA regulations Evaporator Removal The evaporator heat exchanger is foamed in place in the back cabinet wall. 1.
Top of machine compartment Interior back wall Cut away suction line at the above locations. Extend new assembly through the hole. Make sure ends are capped. Drill a ½” hole downward into machine compartment. Install vibration isolator on heat exchanger assembly behind evaporator. Size and cut the suction tube extension to connect the compressor to the suction line.
Evaporator Installation A replacement evaporator assembly (42249115) will include the following components: (1) Evaporator heat exchanger assembly (1) Filter drier (1) Pre bent suction tube extension (1) Vibration isolator (2) Nylon zip tie fasteners (2) Pieces of permagum 1. Take the replacement evaporator and unroll the capillary tube on the heat exchanger. 2. Absolutely make sure that the ends of the capillary tube and suction line are well capped.
20.3: SERVICE BULLETIN # 41013995 Rev C Contact between the Door and Door Sensor Complaint: An audible door alarm sounds every 60 seconds and “Door Ajar” will continually flash on the User Interface display pad. Diagnosis: The door sensor and / or spacer are not closing the alarm circuit. Both components should be replaced. Models Impacted: Most ML and MP models built within the serial number range listed below. Ice Machines (no door sensor) and Refrigerated Drawers are exempt.
The Door Sensor The door sensor is located on the bottom cabinet flange; approximately 5 ¼” away from the inside flange of the cabinet; on the handle side of the cabinet (Exact measurement location attached). The Refrigerated Drawers do not use this technology, dual rocker switches are used for drawer models. The door sensor is resistance activated by the pressure from the door gasket. Light functionality and the door alarm are directly related to this switch.
Sensor removed Peel away from cabinet flange Prior to proceeding with the next step, please refer to the following pages on proper placement for both the door sensor and the door spacer.
ALWAYS LOCATE AND POSITION THE SENSOR FROM THE HANDLE SIDE OF THE CABINET. NOTE: Prior to removing the backing from the sensor, the surface of the cabinet flange needs to be prepared using an alcohol wipe to remove any dirt or residue. 1) The front vertical edge of the sensor (B) is located 5 ¼” (5.25”) from the inside of the cabinet flange (A). 2) Locate the top of the sensor along the top edge of the bottom cabinet flange (C). Door Sensor Replacement 1.
20.4: SERVICE BULLETIN # 41014167 Slotted Condenser Shroud Complaint: The condenser fan motor cannot be replaced without disconnecting all the existing wiring passing through the hole in the fan shroud. Correction: The new fan shroud is slotted from the bottom of the hole in the fan shroud to the bottom edge of the shroud surface.
20.5: SERVICE BULLETIN # 41014168 Showroom Mode Alarm Complaint: Appliance sounds an audible alarm when in the showroom mode. Diagnosis: An audible alarm sounds every 45 seconds after an “undetermined” amount of time once the appliance is placed in the showroom mode. No error code will be displayed on the user interface display. The firmware installed on the main power board has an alarm feature installed that sounds once the appliance is placed in the showroom mode.
Service Kit: Provide complete model and serial numbers to ensure that the main power boards are programmed to the specific model. These boards are not field adjustable or interchangeable between models. They are programmed model specific. Part Numbers o S41050480 Single Zone Appliance* o S41050401 Dual Zone Appliance* *Available per model type, contact customer service at 1-800-223-3900 Service Procedure: Disconnect the appliance from the power supply. Gain access to the machine compartment.
20.6: SERVICE BULLETIN # 41014169 Evaporator / Heat Exchanger Replacement (RF and RFI Models ONLY) Complaint: Not getting cold Not cold enough Long run time Diagnosis: Evaporator Leak Welded aluminum / copper seam leak Restriction Correction: The evaporator heat exchanger assembly must be replaced. Refer to Section 16 for access to the evaporator assembly. The heat exchanger is foamed in place from the inside of the machine compartment to the inside of the freezer compartment.
Kit Components: Evaporator Heat exchanger Filter drier Suction line insulation Permagum Suction line cover panel 3 p-clamps 12 sheet metal screws 2 aluminum defrost heater straps Procedure: Disconnect power to appliance. Access evaporator compartment per Section 16. Reclaim refrigerant. Cut away and discard exposed evaporator and heat exchanger assemblies. Install new evaporator assembly per the kit instructions. Charge and leak check seal system. Reassemble all components.
Un-braze the remaining suction line and the filter drier at these joints. Completely remove water fill assembly. The location of the finished hole. Use a 1” hole saw to completely drill through the bottom left hand corner inside the water fill tube recess.
Feed the capillary tube and suction line of the new evaporator assembly (inside to the outside) through the 1” hole. Replace heater, defrost termination thermostat, and zip tie the thermistor to the evaporator. Make certain that the drip pan drain fits snuggly into the drain tube. Install the 2 drain pan screws to secure the evaporator assembly. REMEMBER to stuff permagum into the 1” hole drilled for the heat exchanger.
CAUTION: This bend must be made with caution to prevent collapsing, pinching, or restricting the tubing radius. CAUTION: DO NOT CUT. It is critical not to eliminate any tubing length. This is necessary to eliminate the possibility of excessive evaporator feed noise. The entire length of suction/capillary tubing supplied with the assembly must be used. Route the tubing down the outside back wall similar to the picture. Reinstall the fill tube and secure.
Install and braze the ¼” suction line extension (jumper tube) into the compressor and new suction line. Install and braze the filter drier. Once the tubing has been brazed and the system closed; pull a vacuum, leak check, and weigh charge per the specified amount on the serial plate. Notch out a clearance hole on the rear access panel to accommodate the suction line and capillary tube.
Attach the back cover and return to operation.
20.7: SERVICE BULLETIN # 41014241 Shelf Shim Kit (Non-Professional Models) Service Kit: 42249228 Models Affected: All non-professional models Serial Number Range: All Contents: 6 washer packages of assorted thicknesses and density. Application: Shim kit to correct shelving falling out of support track due to dimensional variances.
Step #1: Check that the shelf rollers are not bent. Shelf rollers should be parallel to the shelf rail. If a roller is bent, use pliers to bend the roller back to the correct position and check to see if shelf still falls out of rail. These photos show the correct orientation of the shelf roller. They should be in a vertical upright position without appearing at an angle.
Step #2: If shelf still falls out of rail, confirm that the shelf shims in use are correct per the following, correct if necessary, and re-check shelf support. Hinge-Side Full-Shelf 0.330” - [Front] 0.210” - [Rear] Handle-Side Full-Shelf 0.
Step #3: If shelving still falls out of support, add additional shim(s) as necessary. Kit includes 0.09” hard plastic and 0.090” & 0.060” rubber shims for this step. First, add 0.090” hard plastic shims at front and rear of the handle side. If shelving continues to fall out, add another 0.09” shim to front and rear as appropriate. If use of 0.090” hard plastic shim makes shelf fit too tight, (no longer rolls freely in & out), use of a 0.090” or 0.060” rubber shim may be used.
20.8: Service Bulletin # 41014242 Miscellaneous Control Communication Errors Models Affected: All Serial Number Range: All Complaint: Unidentifable errors seen on the User Interface display. The photos to the left show a definite communication error (cE), the result of this was a broken brown wire in the cable itself. This can occur inside a connector at the user interface, the bottom of the door, the main control board, or a broken wire anywhere in the cable itself. Other possible errors are: 1.
20.9: Service Bulletin # 41014243 Replacement of MP Door Skins Replacement of a Marvel Professional Model Door Skin (caused by damage) Models Affected: All Serial Number Range: All Tools Needed: Phillips screwdriver 3/32: hex (allen) wrench Lift up on the left hand side of the user interface display. Once the display is unseated, raise it high enough from the door boot to disconnect the wire harness.
Remove the two Phillips screws on the top inside of the door frame. Remove the two Phillips screws on the bottom inside of the door frame. NOTE: Now that the door skin has been loosened, the side of the door skin may want to grab and hold onto the hinge side of the door. CAREFULLY and gradually work free.
1. Grasp the bottom of the door skin and pull forward away from the door. 2. Carefully lift upward so the user interface harness can be removed. 2 1 Continue to lift the door skin from the top of the door. The lock assembly will be removed with the door skin. The handles will have to be removed and transferred to the new door assembly. Reassemble the door skin to the door in reverse order that it was removed.
Section 21: AGA Marvel Customer Service TECHNICAL SERVICE: 1-800-223-3900* PART ORDERS: 1-800-223-3900* (*Follow the phone queue to reach the correction extension) Marvel Service Documentation: www.marvelservice.com Contact: 1-800-223-3900 if you do not already have a password to access the web site.
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www.marvelrefrigeration.
