Norcold 121X Series Service Manual
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Norcold 121X Series Service Manual

Gas/electric refrigerators
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See also: Owner's Manual , Installation Manual
SERVICE MANUAL
121X Series Gas/Electric Refrigerators
© NORCOLD, INC. All rights reserved.
Publication No. 630613B (08-10-07)

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  • Page 1 SERVICE MANUAL 121X Series Gas/Electric Refrigerators © NORCOLD, INC. All rights reserved. Publication No. 630613B (08-10-07)
  • Page 2 This page intentionally left blank...

  • Page 3: Intended Use

    121X-XX gas absorption refrigerators. ® The information, illustrations, and specifications contained in this publication are based on the latest product information available at the time of publication. NORCOLD reserves the right to make changes at ® any time without notice.
  • Page 4 Section 7: Electronic Controls This section covers the power board, optical control display assembly and replacement of boards Section 8: Cooling System. This section covers cooling system refrigerant, leveled operation requirement, poor cooling issues, cooling issues related to cooling system performance, voltage and component effects on cooling performance, LP gas pressure and components issues related to cooling performance, electrical operated components failure related to cooling performance, dirty flue effects on flame...

  • Page 5: Replacement Parts

     Vent kit requirement. NORCOLD ® Cooling System Serial Number  Customer last and first name. All genuine Norcold cooling systems are  Address, City, State, Zip Code. serialized. Serial number labels location are  Telephone number. illustrated in Figure 1-2, page 4.
  • Page 6 1 COLD- SET TEMP MODE ON/OFF 9 COLDEST NORCOLD. INC. TESTED FOR LP GAS: EQUIPPED FOR PROPANE / Teste pourle GPL, equipped por le propan SIDNEY, OHIO SUPPLY BURNER 11 "WC 10.5 "WC bruleur alimentati SERIAL # / N de serie...

  • Page 7: Safety Awareness

    Safety Awareness It is not possible to anticipate all of the CAUTION conceivable ways or conditions under which the refrigerator may be serviced or to provide The CAUTION symbol and text identify warnings and cautions as to all of the possible hazards or conditions, which if ignored hazards that may be present.
  • Page 8 Safety Review General Safety  Prevent child entrapment! Before disposing  Use an anti-static grounding strap before of the refrigerator, remove all doors and attempting to handle, remove or install the fasten all shelves with retainers. power board. Cooling System Safety  External components may have sharp corners and edges.
  • Page 9 2 —s ection pecificAtions Internal Capacities Freezer (2) volume ---------------------------------------------------------------------------- 1.3 cu.ft. each Fresh food compartment volume -------------------------------------------------------------------8.0 cu.ft. Controls Type ------------------------------------------------------------------ Electronic with built-in self diagnostic ON/OFF/MODE/TEMP SET switches ------------------Overlay assembly with flush-pushbuttons Temperature setting range ------------------------------------------------------------ 1=cold to 9=coldest Temperature sensing device ---------------------------------------------------------------------- Thermistor Off-level operating limits Side-to-side------------------------------------------------------------ 3 degrees maximum at refrigerator...
  • Page 10 This page intentionally left blank ection...
  • Page 11 3 — Q ection uick reference rouble hooting uide Problem Probable Cause Reference Page 12 12 volt DC not connected to power board. Blank display- Refrigerator Loose / broken connector. Page 12 does not turn ON. Power board F1 fuse open (blown). Page 14 One AC heater failed open.
  • Page 12 Fault Code Probable Cause Reference Page 12 12 volt DC not connected to power board. Blank Display Power board F1 fuse open (blown). Page 12 Screen Optical display controls overlay malfunction. Page 13 Thermistor disconnected/open. Page 18 Flashing Temp Thermistor wiring terminals corroded / broken Page 19 Setting AUDIBLE...
  • Page 13 Fault Code Probable Cause Reference AUDIBLE Flame present with gas off. Page 26 ALARM AUDIBLE Open circuit high temperature limit switch. Page 27 ALARM AUDIBLE No AC voltage input to power board. Page 29 AC cord unplugged at power board. Page 29 Page 29 Power board F2 fuse open (blown).

  • Page 14: Troubleshooting Flowcharts

    Troubleshooting Flowcharts Blank display- Refrigerator does not turn ON. 1 COLD- SET TEMP MODE ON/OFF 9 COLDEST Begin • Check DC voltage input at Power Board. • Check for loose or damaged RV wiring 10.5 to 15.4 VDC at Power Board or connectors.
  • Page 15 From page 12 • Wire harness connector not 1. Plug wire harness connector back into fully plugged in and locked the P1 Power Board connector. into P1 Power Board P1 con- nector. Voltage output? 2. Check for voltage across the Yellow/ Green wire and Green terminals as •...
  • Page 16 Continuity through the Wire Harness Blue wire? If possible make repairs. If repairs are not suc- Continuity through the Wire Harness cessful or cannot be made, call Norcold Technical White/Red wire? Support 1-800-444-7210 for assistance. 1. Plug the wire harness back into the Power Board P1 connector.
  • Page 17 100 B ANSI Z21. 2 F1 Fuse/5 Amp 5VDC 0544 700514 05-43 5A@120VAC CHINA CPC - E 94 V - 0 12 VDC TRUE RMS MULTIMETER P1-6 MIN MAX RANGE HOLD P1-1 4 1/2 DIGITS PEAK MIN MAX 1 Seconds –...
  • Page 18 Green TRUE RMS MULTIMETER White/Violet MIN MAX RANGE HOLD 4 1/2 DIGITS PEAK MIN MAX 1 Seconds µA mA µA 400mA MAX CAT II FUSED 10A MAX 1000V MAX FUSED 10.5 to 15.4 volts DC Figure 3-4. —Measuring DC voltage across White/Violet wire and Green wire at the optical controls display assembly circuit board connector.
  • Page 19 To check White/Red wire and Blue wire for continuity: P2 Power board connector 1. Disconnect P1 and P2 from Power Board. Blue 2. Disconnect Optical Control Assembly P1 from circuit board. Jumper into P1-9 and P2-3 3. Jump White/Red wire and Blue wire at Power P1 Power board connector Board P1 and P2 connector.
  • Page 20 Thermistor Circuit Open or Shorted —Backup Operating System (BOS) Blinking 1 COLD- SET TEMP MODE ON/OFF 9 COLDEST Open or shorted thermistor Backup operating system (BOS) BOS is a duty cycle designed to maintain This fault is indicated by a blinking cooling anytime the thermistor is sensed temperature setting.
  • Page 21 Meter set to kohm scale Light connections Connector WIres color THERMISTOR: Red/White stripe LIGHT Black /White stripe Container with crushed ice White/Black stripe Thermistor Thermistor Figure 3-10. —Checking thermistor resistance. Location: on the second fin from right side of fin assembly Figure 3-9.
  • Page 22 AC HE Code— AC Heaters Failed Open IMPORTANT The AC HE fault is recorded in either the AUTO or Manual AC mode. The following may apply. AUTO MODE: When AC heaters current input falls below 0.5 amperes and AUTO LP has locked out, the fault is set and recorded to non volatile memory approximately 25 seconds after it occurs, providing there is a call for cooling.
  • Page 23 AC rE Code—AC Relay Stuck Closed IMPORTANT The AC rE fault is recorded in all operating modes any time AC heater current is sensed on when it is supposed to be off. The AC rE code displays and is recorded in non volatile memory approximately 25 seconds after the fault occurs.
  • Page 24 dc LO Fault Code—DC Voltage Low IMPORTANT The dc LO fault is recorded in all operating modes any time DC voltage input falls below 10.5 volts DC. The dc LO code displays and is recorded in non volatile memory approximately 25 seconds after the fault occurs.
  • Page 25 dc HI Fault Code—DC Voltage Low IMPORTANT The dc HI fault is recorded in all operating modes any time DC voltage input is above 15.4 volts. The dc HI code displays and is recorded in non volatile memory approximately 25 seconds after the fault occurs.
  • Page 26 dr Code—Door sensed ajar or open for more than 2 minutes IMPORTANT The dr fault is recorded in all operating modes any time one or both fresh food compartment door has been sensed open for two minutes. The controls turn the light off after the two minute period.
  • Page 27 From page 24 Replace door. Door damaged or warped? 1. Recheck fresh food compart- ment doors alignment. Align doors as needed. Switches turn off light when held Replace switch. 2. Check worn hinge bushing . closed? 3. Check for bent bottom hinges. Replace as needed.
  • Page 28 FL – – Code — Flame Present with Gas Off IMPORTANT The FL -- fault is recorded in all operating modes any time a flame is sensed at the burner when is not supposed to be lit. The FL -- fault displays and is recorded in non volatile memory approximately 25 seconds after it occurs.
  • Page 29 L1 oP Code—Open High Temperature Limit Switch IMPORTANT The L1 oP indicates the high temperature limit switch is open or disconnected. The switch is located on the cooling system canister. It is designed to open when the cooling system boiler temperature exceeds 378 degrees Fahrenheit (192.2 degrees Celsius). On units with non-resettable switch, replace the switch with a resettable switch.
  • Page 30 From page 27 Obstructions blocking air flow through the enclosure? Check fans operation. 1. Clear obstructions. 2. Replace/reset high temperature limit switch. 3. Test cooling system performance on AC and LP gas operation. Fans okay? Check fans switch. 1. Replace fans. 2.
  • Page 31 no AC Code—AC Mode Selected/ AC Voltage Not Available IMPORTANT The no AC fault is recorded in either the AUTO or AC manual mode. For the fault to occur in the Auto AC Mode AC voltage has to fall below 85 volts with LP gas operation locked out by the controls.
  • Page 32 no FL Code—Burner Failed to Light/Relight IMPORTANT The no FL fault is recorded in both the AUTO and MANUAL LP mode. Once the 30- second trial for ignition has timed out, the fault is set and recorded in non volatile memory approximately 25 seconds later.
  • Page 33 Check continuity of solenoid coil wires. From page 30 See Figure 3-13 Repair wires. Continuity? Check voltage output to solenoid coil. See Figure 3-14 Check continuity Replace power board. Voltage present during trial for ignition? TRUE RMS MULTIMETER MIN MAX RANGE HOLD 4 1/2 DIGITS...
  • Page 34 Sr Code—Flame Sensing Malfunction IMPORTANT This fault is recorded in all operating modes anytime one of the following occurs: Problem in flame sense circuitry. Gas valve drive circuit present when it is not supposed to be. Gas valve drive circuit not present when it is supposed to be. Internal memory fault.
  • Page 35 4 —V ection entilAtion Enclosure The cabinet that encloses the refrigerator is built by the RV manufacturer. Depending on cabinet depth, height, and width certain baffles may be present when cabinet FRONT OF RV clearances exceed installation guidelines and specifications. Baffles Roof cap Baffles prevent hot air buildup “pocketing”...
  • Page 36 Aluminum or galvanized steel sheet baffle full width of enclosure. 1/4 in. clearance max. 622293 Roof cap. 616319 Exhaust vent Top baffle 0 - 1 in. clearance max. Fans 0 - 1 in. clearance max. Bottom baffle Distance between the top of the lower vent opening and bottom of baffle 4¼...
  • Page 37 622293 Roof cap. Aluminum or galvanized steel sheet baffle 616319 Exhaust vent full width of enclosure. Angle not to exceed 45°. Top baffle. ¼ - 1 in. clearance max. Fans ¼ - 1 in. clearance max. B.ottom baffle. Distance between the top of the lower vent opening and bottom of baffle 4¼...
  • Page 38 Aluminum or galvanized steel sheet baffle 1/4 in. clearance max. full width of enclosure. 622293 Roof cap. 616319 Exhaust vent 0 - 1 in. clearance max. Fans Wood, aluminum or galvanized steel sheet solid baffle. Full width of enclosure Starts 18 to 18½ from enclosure floor 0 - 1 in.
  • Page 39 Distance between inner wall and cooling system less than 2 in. Aluminum or galvanized steel sheet full width of enclosure. Opening between condenser fins and baffle 0 - 1/4 in. 0 - 1 in. 0 - 1/4 in. Fans Distance between bottom of condenser fins and top of baffle 0 - 1/4 in.
  • Page 40 Distance between inner wall and cooling system 2 in. or more Aluminum or galvanized steel sheet full width of enclosure. Opening between condenser fins and baffle 0 - 1/4 in. 0 - 1 in. 0 - 1/4 in. Distance between bottom of Fans condenser fins and top of baffle 0 - 1/4 in.

  • Page 41: Pressure Requirements

    5 —lp g ection ysteM WARNING When working on or near the LP gas system:  Do not smoke or light fires! Extinguish  Do not cross thread fittings. Be careful all open flames! when connecting or disconnecting components, piping or fittings.  Do not use matches, lighters or an open flame to test for LP gas leaks.

  • Page 42: Specifications

    Gas valve Burner tube 7- slot burner LP18 orifice assembly Figure 5-1. —121X model LP gas system components. Gas Valve The combination gas valve is illustrated in Figure 5-1. Specifications Solenoid coil amp draw ... 0.146 A @ 12 VDC Resistance ........81 OHMS Maximum pressure ......1/2 PSI Operation...
  • Page 43 Serviceability The gas valve has no replaceable parts. 6. Disconnect the LP gas supply line. The 12 volt DC solenoid coil terminals should 7. Disconnect the burner tube. be maintained clean and tight. The valve’s 8. Remove two, #8/32 x 3/8" Phillips screws body and solenoid coil should be maintained holding the existing gas valve to the bracket, clean and dry.
  • Page 44 Burner tube Solenoid coil 12 VDC power connections Bracket RV LP Gas supply line LP gas supply line connection fitting Burner tube connection fitting Torque 75 to 95 in. lbs. #8-32 X 1/2” Phillips screws (2) Figure 5-3. —Gas valve replacement. ection...
  • Page 45 Measuring Solenoid Coil Resistance Tools: Multimeter To measure solenoid coil resistance. 1. Turn off the refrigerator. 2. Disconnect wires at the solenoid coil connections. 3. Set multimeter to the Ohm function. 4. Connect multimeter probes to the solenoid coil terminals as illustrated in Figure 5-4. —Coil resistance should be within 77 and 85 ohms.
  • Page 46 7- slot burner Retaining screw Burner and Orifice Assembly #8-32 X 3/8" Phillips head The 7-slot burner, illustrated in Orifice assembly Figure 5-6 is fitted an LP 18 cap style orifice. The burner is retained in the burner box by a #8/32 x 1” Phillips pan head screw.
  • Page 47 10. Check the orifice. Replace if the condition 14. Connect the burner tube to the orifice of the orifice assembly is questionable. To adapter fitting. Thread the fitting by hand, clean the orifice assembly, dip the assembly then finish tightening using two wrenches. in denature alcohol and air dry.
  • Page 48 6 —e ection lectricAl ower eQuireMents And oMponents DC Power Requirement Fresh Food Compartment Light Refrigerator controls require 12 volt DC to The fresh food compartment light off and function. The minimum voltage input to the on operation is controlled by door operated power board is 10.5 volts;...
  • Page 49 Left freezer Right freezer 1 COLD- SET TEMP MODE ON/OFF 9 COLDEST Left light switch Right light switch Right door Left door Fresh food compartment Light Thermistor location Figure 6-3. —Light, switches, and thermistor location. Light/Thermistor Wire Assembly The light and thermistor share a modular connector.
  • Page 50 Divider Heater The divider heater is permanently “foamed” between the freezer and fresh food compartment divider. Powering on the Spacer (2 per fan) refrigerator automatically powers on the divider Retaining screws heater. Power to the heater is continuously supplied by the power board.. 12 Volt DC Fans Two 12 volt DC fans, illustrated in Figure 6- Bracket...
  • Page 51 Fan replacement IMPORTANT Fan replacement requires removal of the to thermostatic switch refrigerator from the enclosure. The RV manufacturer may have installed additional brackets and screws. Always, double check for additional screws and brackets before attempting to remove the refrigerator Red “Y”...
  • Page 52 Flapper Assembly The flapper assembly, illustrated in Figure 6- Spring pins 8, is hinged to the left fresh food compartment Flapper assembly Contacts door. It acts as the vertical sealing surface for the fresh food compartment doors inboard gasket. The flapper is equipped with a 12 volt DC moisture reduction heater.
  • Page 53 Flapper replacement Tools: Flapper assembly # 2 Phillips screwdriver Up to remove To remove the flapper assembly: Refer to Figure 6-9 for location of components. Hinge screw 1. Power off refrigerator. 2. Open the left fresh food compartment door. 3. Remove the bottom and top flapper hinge Top hinge screws.
  • Page 54 Contact point on cabinet CAUTION Do not attempt to remove the spring pin Left door - hinge side flange from door! The flange is not a replaceable part. Attempting to remove the flange will disconnect the wires from the pins housing resulting in door replacement.

  • Page 55: Ac Power Requirements

    AC Power Requirements AUTO AC or AC mode operation requires 108 to 132 volts AC. Voltage is to be supplied through a 2 pole/3 wire/20 amp grounding type receptacle. Three prong grounding style plug WARNING #8-32 x 1"  Do not remove the grounding prong from the refrigerator AC power cord! #8-32 x 1"...
  • Page 56 AC Fuse The AC fuse, location illustrated on Figure 6-14, is an 8 amp fast acting 1/4 x 1-1/4 x 1" AGC fuse. Figure 6-15 illustrates how to check fuse continuity. 100 B ANSI Z21. 2 00.0 5VDC 0544 700514 05-43 5A@120VAC Figure 6-15.
  • Page 57 7 —e ection lectronic ontrols Power Board 100 B ANSI Z21. 2 Figure 7-1 shows a front view of the power board. Inputs, outputs, monitoring information, and diagnostic functions are sent and received through a wire harness linking the power board with the optical control assembly.
  • Page 58 Cover 8-32 x 1" Hex head screw Base 8-32 x 1" Hex head screw Spark/sense electrode Assembly Cover Base 8-32 x 1" Hex head screw 8-32 x 1" Hex head screw +12 VDC –12 VDC Figure 7-4. —Power board —External connections. P2 Connector 100 B ANSI...
  • Page 59 Hinge cover Retaining screw Retaining screw Striker Plate 1 COLD- TEMP SET MODE ON/OFF 9 COLDEST Retaining screw Figure 7-6. —Optical control display assembly overlay and hardware. Optical Control Display Assembly Optical control display assembly replacement Tools: Figure 7-6 illustrates the front overlay view of the optical control assembly.
  • Page 60 To disconnect To connect Back View Figure 7-9. —Harness connector —Optical control display circuit board. Power board replacement procedure Tools: For steps 7, 8, 9, 10, See Figure 7-12, page 60. 7. Disconnect the AC heater wires at power 1/4" nut driver board: Anti-static wrist strap a.
  • Page 61 Spark/sense electrode Assembly AC power cord 12 volt DC connections Figure 7-10. Power board external connections. Cover 8-32 x 1" Hex head screw Figure 7-11. Cover retaining screws location. ection...
  • Page 62 P2 Connector P1 Connector AC Heaters High temp limit Black leads switch leads AC Heaters Yellow leads Figure 7-12. Power board internal connections. To remove the power board from base: 1. Press the left tab in to free the left side. 2.

  • Page 63: Leveled Operation

    8 —c ection ooling ysteM The cooling system is a sealed gas absorption Insufficient or obstructed ventilation refrigeration system charged with R 707 Insufficient or obstructed ventilation reduces refrigerant. cooling efficiency because the heat load generated and dissipated by the system is not efficiently removed.
  • Page 64 “O” shape flue cap Flue Flue baffle wire Flue Flue baffle 700000 Serial Number NORCOLD Made in USA Canister 7-slot burner LP18 orifice Figure 8-1. —Flue and associated components. Fan failure Inadequate repairs The fans enhance ventilation when ambient Inadequate repairs that may result in poor temperature is 90 degrees Fahrenheit (32.2...
  • Page 65 Cooling System Monitoring The cooling system monitoring control If fin temperature remains above 50 degrees monitors the cooling performance through the Fahrenheit (10 degrees Celsius), the cooling thermistor. system monitoring records the fault in non volatile memory. Figure 8-2 illustrates the Monitoring is active when fin temperature fault segment that appears in diagnostic mode (second fin from right on fin assembly) is...
  • Page 66 Canister Resettable high temperature limit switch (replacement for non-resettable switches Figure 8-4. —The present configuration of the high Figure 8-3. —Location of original high temperature temperature limit switch. limit switch (resettable switch shown). High Temperature Monitor System The purpose of the high temperature monitor switch configuration with a resettable switch.
  • Page 67 Cooling Unit Testing Cooling System Replacement The cooling System Diagnostic Flowchart on The cooling system has to be tested for proper page 66 through page 67 provides sequential operation. Test results need to show that both steps to troubleshoot the cooling system. the freezer and the fresh food cabinet do not Before attempting to replace the cooling cool in AUTO mode, AC manual mode or in LP...

  • Page 68: Cooling System Diagnostic Flowchart

    Cooling System Diagnostic Flowchart WARNING WARNING Do not bypass or modify the refrigerator controls. Do not wire the heater directly. Do not power ON the refrigerator if the Heaters are supplied power through a cooling system has a leak or is suspected fused circuit.
  • Page 69 From page 66 Replace cooling system. Gurgling sound from boiler area? Test cooling system performance. Cooling system performance check: 1. Disconnect the thermistor from the circuit. 2. Set mode to AC. 3. Set temperature setting to 9. 4. Place a thermometer in a Replace cooling unit.
  • Page 70 Cooling System Removal CAUTION IMPORTANT Protect the front of the refrigerator! Cover Cooling system replacement requires removing the floor with a moving blanket/pad or the refrigerator from the enclosure. similar soft material to protect the floor as well as the refrigerator doors panels and optical display when the refrigerator is laid It is not possible to anticipate all of the RV down on the floor.
  • Page 71 11. Remove wire ties that hold wire protector to CAUTION cooling unit plug. 12. Remove permagum sealer from drain hose Use only NORCOLD approved Thermal opening. Save for reinstallation. Mastic sealant (part number 61450740). 13. Cut the tape along the four edges of the Do not use silicon, latex or petroleum base cooling unit back wrapper.
  • Page 72 Thermostatic switch -Fans Screw -condenser bracket Screw -condenser bracket Screw-Wire tie WRAPPER Fans (2) Wire tie Permagum sealer Screw -absorber bracket Screw -absorber bracket Power board cover Water Valve Dip cup Gas valve 7-slot burner Figure 8-5. —Cooling unit component location -Lower Section. ection...
  • Page 73 Cut Thermal Mastic Apply a bead approximately sealant tube to dispense 1/2 inch wide x 1/2 inch thick a bead approximately 3/4 inch wide x 1/2 inch thick Figure 8-6. —Sealant application on evaporators. Figure 8-7. —Sealant application on cabinet opening sides.
  • Page 74 7. Install condenser brackets screws. Tighten WARNING each screw 15 to 20 inch-pound. 8. Install the absorber coil brackets screws. Do not attempt to upright the refrigerator Tighten each screw 15 to 20 inch-pound. without the assistance of an able person. 9.
  • Page 75 9 —d ection iAgnostics Diagnostic Mode Setting Display to Diagnostics The diagnostic mode is a tool incorporated in To set the display to diagnostics: the controls. This tool is designed to assist in verifying temperature, inputs, outputs, and to 1. Press and hold down the retrieve recorded fault stored by the controls.
  • Page 76 Diagnostic Screens Information Screen Fin Temperature Screen All Diagnostics LED On 1 COLD- 1 COLD- 9 COLDEST 9 COLDEST Displays fin temperature as sensed by the Confirms display is set to Diagnostics. Within temperature sensing circuit through the five seconds the screen number is replaced by thermistor.
  • Page 77 Screen Clear Stored Fault History Screen Stored Fault History 1 COLD- 1 COLD- 9 COLDEST 9 COLDEST This screen is used to erase stored fault The second of two stored fault history screens. history from screens four and five. To clear It displays stored fault history using lit LED fault history: segments.
  • Page 78 Screen AC Voltage Input Screen Power Board Outputs 1 COLD- 1 COLD- 9 COLDEST 9 COLDEST Displays AC voltage input to power board through lit LED Displays “live” power board outputs through lit LED segment. The assigned LED segments and information are segments.

  • Page 79: Ice Maker

    10 —i ection Aker Ice Maker Operation The ice maker, illustrated in Figure 10-1, is The left freezer temperature determines the supplied AC power through a wire harness. It efficiency of the ice maker. The colder the is ON when the shut-off arm is lowered to the temperature in the freezer, the faster the water down position and OFF when the shut-off arm in the mold will freeze.
  • Page 80 Components Wire Harness AC Power Cord Green Ice Maker Brown White Thermal fuse Black Tab style locking connector 1211 IM 1210 IM Thermal fuse Flat side clipped to mold. Black: line voltage/female Green: ground/with quick-connect White: neutral/male quick-connect Brown: to water valve solenoid coil/female quick-connect Figure 10-3.
  • Page 81 Water Fill Line Figure 10-4 illustrates the water fill line. The fill Water fill tube line connection at the water valve is a 1/4 inch plastic compression fitting. The connection at the water fill tube is made with a 1/2 inch hose clamp.
  • Page 82 Solenoid coil Water Valve The water valve, illustrated in Figure 10-6, is not a repairable component. Bracket The solenoid coil is rated for 20 Watts @120 VAC. The ice maker cycle energizes the coil for approximately seven seconds shortly after the ice cubes are ejected.
  • Page 83 120 VAC WHITE Cycling the Ice Maker Manually 120 VAC BROWN Cycling the ice maker manually verifies the Spacer (2) motor works, the mold heater turns on and off, #8-32 x 2" Screw (2) the shut-off arm travels to the OFF position, the water valve opens for seven seconds, and +12 VDC in the shut-off arm drops to the ON position.
  • Page 84 6. Pull out the jumper wire when a “click” sound is heard or no later than 15 seconds after jumpering test points T and H. a. The motor turns the ejector in a clockwise direction and the mold heater energizes. b.

  • Page 85: Water Fill Adjustment

    Normal setting = internal contact opening centered in module hole Water fill adjustment screw 185W–115V– 60 HZ 01/13/03 185W–115V– 60 HZ 01/13/03 Do not exceed one turn Figure 10-11. —Jumpering test points V and Figure 10-12.. —Water adjustment screw and contact alignment location.
  • Page 86 Checking Water Valve Solenoid Coil Resistance TRUE RMS MULTIMETER The solenoid coil resistance should measure between 295 and 360 ohms. It can be checked MIN MAX RANGE HOLD 4 1/2 DIGITS PEAK MIN MAX 1 Seconds at the water valve solenoid coil as illustrated in Figure 10-13 or through the ice maker mA m A module test points V and N as illustrated in...
  • Page 87  NOTE 185W–115V– 60 HZ The multimeter test probe tips must be at least 01/13/03 1/2 inch long to contact the test points. 5. Set the multimeter to ohmmeter function, then insert one probe into point L and the TRUE RMS MULTIMETER other into point H as Figure 10-14 illustrates.

  • Page 88: Ice Maker Troubleshooting Chart

    Ice Maker Troubleshooting Chart Symptom Probable Cause Solution 1. No AC power available. 1. Restore AC power. Not cycling and no 2. No water available. 2. Restore water pressure. ice in mold. 3. Water valve strained clogged. 3. Clean water valve strainer. 4.
  • Page 89 Press on to Install Ice Maker Replacement Procedure Tools #2 Phillips screwdriver Cover 5/16” nut driver #2 Flat blade screwdriver To remove the ice maker: Thermal fuse 1. Turn off the refrigerator. Pull to remove 2. Unplug the ice maker AC power cord at the Figure 10-18.
  • Page 90 Figure 10-21 illustrates the back view of modular water valve assembly found in 121X IMWD and 1211 IMWD models with ice maker and water dispenser system. The label on the side of the assembly lists the assembly part number, specifications, and identifies the water dispenser solenoid coil (colored Blue, 12 VDC) and the ice maker solenoid coil (colored Red, 120 VAC).
  • Page 91 11 —w ection Ater ispenser The water dispenser is an optional system installed at the factory. The main components are the divider mounted water dispenser (Figure 11-1), the reservoir (Figure 11-2), and the water valve (Figure 11-3). Reservoir -27 fl. oz. capacity Cover - attached with hook and loop tape Figure.
  • Page 92 Water Dispenser —Operation The water dispenser works as follows. Water flows from top of the reservoir to the Pressing a small container against the spring spigot. The water flowing out of the spigot is loaded paddle drives in the plunger, which replaced by water flowing into the reservoir as closes the switch.
  • Page 93 Water Valve Replacement 4. Disconnect the +12 volt DC BLACK  wire and the -12 volt DC WHITE  wire from the  NOTE water valve solenoid coil. 5. Disconnect thermostatic switch and the water fill line heater as follows: This procedure applies only to the modular ice a.
  • Page 94 Reservoir Replacement Dispenser Switch Replacement Tools # 2 Phillips Screwdriver 1. Shut off the water supply to the valve. 2. Place a suitable container under the spigot then operate dispenser to relieve water pressure. 3. Power off the refrigerator. 4. Disconnect the water line at the valve and place the end in suitable container to catch the draining water.
  • Page 95 LED Circuit Board Replacement Tools # 2 Phillips Screwdriver 1. Power off the refrigerator. Hinge cover Striker plate 2. Remove the left hinge cover. 3. Remove the striker plate. 4. Remove water dispenser cover. See Figure 11-10. Retaining screws 5. Disconnect circuit board from circuit. See Figure.
  • Page 96 12 —w ection iring iAgrAMs And ictoriAls Figure. 12-1. —Wiring diagram. ection...
  • Page 97 Figure. 12-2. —Wiring pictorial. ection...
  • Page 98 ..............................120 VAC Hot/Smooth ............................120 VAC Neutral/Smooth ..............................Ground connection ................................Thermal Fuse ............................Solenoid Coil/Water valve ................................... Ice Maker ................................Mold Heater .................................Mold Thermostat ................................ON/OFF Switch 10 ................................... Fill Switch 11 .................................Hold Switch 12 ................................Stepper Motor GRN / VERT BRN / BRUN NEUTRAL (RIBBED) / NEUTRE (À...
  • Page 99 This page intentionally left blank ection...
  • Page 100 NORCOLD, Inc. Customer Support Dept. NORCOLD, Inc. Telephone: 800-543-1219 P. O. Box 4248 Fax: 937-497-3183 Sidney, OH 45365 www.norcold.com 121X S 630613b (08-10-07) erieS ervice anual ublication...

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