Norcold 8662 Repair Manual
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Norcold 8662 Repair Manual

Norcold 8662 Repair Manual

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Page
Norcold Repair Guide
Models 865,866,868
5-4 Description of Operation
5-4 AC Electric Mode
5-4 DC Electric Mode
5-5 Operating and Lighting Instructions
5-8 Parts Function
5-15 LP Gas Mode of Operation
5-21 AC Electric Mode of Operation
5-26 DC Electric Mode of Operation
5-30 Illustrations of Normal and Abnormal Conditions
5-34 Wiring Diagrams 2-Way, 8662, 8682
5-35 Wiring Diagrams 3-Way, 8663, 8683
5-36 Wiring Diagrams 2-Way, 8652
5-37 Wiring Diagrams 3-Way, 8653
5-1
Section 5

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  • Page 1: Table Of Contents

    5-21 AC Electric Mode of Operation 5-26 DC Electric Mode of Operation 5-30 Illustrations of Normal and Abnormal Conditions 5-34 Wiring Diagrams 2-Way, 8662, 8682 5-35 Wiring Diagrams 3-Way, 8663, 8683 5-36 Wiring Diagrams 2-Way, 8652 5-37 Wiring Diagrams 3-Way, 8653...

  • Page 2: General Information And Specifications

    10.7 amps at 14 Volts DC 12 Volts DC control voltage AC Mode: 110 Volts AC, 170 Watts CURRENT DRAWS - 8662, 8663, 8682, 8683 12 Volts DC control voltage DC Mode (3-Way only): Automatic ignition - Less than 250 milliamps or .25 amps 12 Volts DC Humidity Heater - 240 milliamps or .24 amps...

  • Page 3: Electrical Connections - 12 Volts Dc

    Electrical Connections - 12 Volt DC All Norcold refrigerator models require a 12 volt DC supply (See Figure 5.1). 12 Volts DC is required to operate the Mode Selector (Eyebrow board) and temperature control circuits and maintain the automatic Ignition gas mode. The DC lead connections (1/4"...

  • Page 4: Control Description

    Operation Control Description If ignition did not occur after the trial for ignition, the Ignition Module will stop sparking and automatically close the gas valve. The Ignition Module Models 865, 866 and 868 require will then send 12 Volt power to the Eyebrow board and illuminate the Red that 12 volt DC be connected to (X) CHECK lamp indicating ignition failure.
  • Page 5 Figure 5.3 Figure 5.4...

  • Page 6: Important Information On 12 Volt Operation

    Figure 5.5 Figure 5.6 IMPORTANT INFORMA- implies an adequate recharging means which can handle the demands of the refrigerator along with other loads. TION ON 12 VOLT DC The wires from the battery to the refrigerator must be of large enough size to OPERATION (3-Way handle the load.

  • Page 7: Location Of Controls

    Location of Controls Models 865, 866, 868 Figure 5.7 Front View - Typical 2 Door Model...

  • Page 8: Power Supply Board

    Parts and Their Function High Humidity Switch and Interior Light Switch Turning the HIGH HUMIDITY switch to ON will keep the surface between the door openings dry during high humidity conditions. The switch should be left in OFF position unless condensation is observed in this area.
  • Page 9 See the identification of Power Supply versions below. 2. On the second version of the Power Supply board, the stor- age switch and the trans- former were removed. When this occurred, a 12 Volt DC supply was required for opera- tion in all modes.
  • Page 10 Production testing only. This information applies to the following models: Use this information as a guide. Figure 5.13 Eyebrow Board Model Beginning Serial# Date 8652 001201 10-02-87 8653 001098 9-23-87 8662 012093 8-25-87 8663 008090 8-26-87 8682 008380 8-27-87 8683 009061 8-25-87 5-10...
  • Page 11 Ignition Module Used only during GAS operation, and does the following: 1. Supplies 12 volt DC to open the gas valve. 2. Supplies power to the Ignition electrode to ignite the Burner. 3. Senses the flame through the Sense electrode. 4.
  • Page 12 Burner Applies heat to the cooling unit when it has the correct amount of LP gas and air. Figure 5.17 Burner Ignition Electrode Sparks the Burner to ignite the flame when supplied with energy from the Ignition Module. Figure 5.18 Ignition Electrode Sense Electrode Senses the heat of the flame and...

  • Page 13: Dc Heating Element

    AC Heating Element Applies specific amount of heat to the cooling unit, providing 120 volts AC is present to the refrig- erator. Figure 5.20 Illustration of Heater Types DC Heating Element Applies specific amount of heat to the cooling unit, providing the DC input voltage is correct.
  • Page 14 Thermistor Senses the temperature of the re- frigerator interior and changes the resistance to the temperature sens- ing circuit telling the refrigerator when to turn off and on. Figure 5.22a Type A Thermistor Figure 5.22b Type B Thermistor Figure 5.22c Type C Thermistor And It’s Fin Location 5-14...

  • Page 15: Troubleshooting

    Problem Solving Steps - LP Gas Operation Answer these questions before calling Norcold’s Technical Number. 1. Is the refrigerator installed and vented in accordance with Norcold’s Product Specifica- tion. See Section 1.
  • Page 16 Storage Switch Location fuse. NEVER OVERFUSE A CIRCUIT. REPLACE BLOWN FUSE WITH EXACT REPLACEMENT INDICAT- ED BY NORCOLD. OVERFUSING OF A CIRCUIT CAN RESULT IN A FIRE. 8. Reconnect the cable to the Power Supply. Set the Mode Selector to OFF as shown in Figure 5.29.
  • Page 17 13. Remove the Eyebrow board from the Eyebrow shown in Figure 5.28. 14. Do not disconnect the cable or Thermistor wire. Figure 5.28 Eyebrow Board Removal 15. Set the Mode Selector switch to the OFF position as shown by Figure 5.29. Note: These checks cannot be per- formed unless the Eyebrow Board...
  • Page 18 25. With Mode Selector still set to Gas Mode, check for 12 Volts DC at the connector between the Power Supply board and Ignition Module (first wire from left) as shown in Figure 5.31. If you do not have 12 volts, re- place the Power Supply.
  • Page 19 29. Check the alignment of the electrodes as shown in Figure 5.34. 30. Check for a loose wire con- nection at the electrodes and Ignition Module. If all checks are proper and still no spark at Burner, proceed to next step. Figure 5.34 Proper Spark Gaps 31.
  • Page 20 34. Check the manual shut-off valve shown in Figure 5.37 to be sure it is in the ON position. Figure 5.37 Manual Valve (alternate versions) 35. Check the Burner and Orifice shown in Figure 5.38 for any obstructions. 36. Check the main line gas pres- sure (See gas pressure sec- tion) for 11"...
  • Page 21 Problem Solving Steps - AC Electric Operation Answer these questions before calling Norcold’s Technical Service Number. 1. Is the refrigerator installed and vented in accordance with Nor- cold Product Specification. See Section 1. 2. Is the refrigerator being operated in a comfortably level position? 3.
  • Page 22 If you do not have 120 volts, replace the 5 amp fuse. NEVER OVERFUSE A CIRCUIT. REPLACE BLOWN FUSE WITH EXACT REPLACEMENT INDI- CATED BY NORCOLD. OVER- FUSING OF A CIRCUIT CAN RE- SULT IN A FIRE. Figure 5.44 5 Amp Fuse Check 5-22...
  • Page 23 3 amp fuse. NEVER OVERFUSE A CIRCUIT. REPLACE BLOWN FUSE WITH EXACT REPLACEMENT INDI- CATED BY NORCOLD. OVER- FUSING OF A CIRCUIT CAN RE- SULT IN A FIRE. Figure 5.45 3 Amp Fuse Check 11. With the volt meter set to measure DC, check Points 1, 2 and 3 shown in Figure 5.46...
  • Page 24 14. Remove the Eyebrow board from the Eyebrow as shown by Figure 5.48. Figure 5.48 Eyebrow Board Removal 15. Set the Mode Selector switch to the OFF position as shown by Figure 5.49. Note: These checks cannot be per- formed unless the Eyebrow board has the LED as shown.
  • Page 25 B101 AC & DC Supply connected but not shown. 23. Check for 120 volts AC on ter- minals J-7 and J-8 of the Power Supply as shown by Figure 5.51. If you do not measure 120 volts, replace the Power Supply. Figure 5.51 120 Volt Output Check Standard Heater...
  • Page 26 Figure 5.54. If you do not have 12 volts replace the 3 amp fuse. NEVER OVERFUSE A CIRCUIT. REPLACE BLOWN FUSE WITH EXACT REPLACEMENT INDICATED BY NORCOLD. OVERFUSING OF A CIR- CUIT CAN RESULT IN A FIRE. 5-26...
  • Page 27 7. Check the three places indi- cated by Figure 5.55 for 12 volts. If you do not have 12 volts as shown replace the Power Supply. Note: On the original version Power Supply the diodes will be marked D6 and D7 and the storage switch must be in the down position "ON".
  • Page 28 11. Set the Mode Selector switch to the OFF position as shown by Figure 5.58. Note: These checks cannot be per- formed unless the Eyebrow board has the led as shown. 12. Connect a volt meter as shown in Figure 5.58. 13.
  • Page 29 WARNING NEVER OVERFUSE A CIRCUIT. REPLACE BLOWN FUSE WITH EXACT REPLACEMENT INDI- CATED BY NORCOLD. OVER- FUSING OF A CIRCUIT CAN RE- SULT IN A FIRE. Figure 5.61 DC Heater Fuse Check Standard Heater (early version) Blue and White Leads 22.
  • Page 30 Illustrations Showing Normal and Abnormal Conditions of the Mode Selector Normal Condition Mode Selector set to GAS, LP light illuminated, and refrigerator operating on gas. Figure 5.63 Normal Condition Mode Selector set to AC ELEC, AC light illuminated, and refrigera- tor operating on AC.
  • Page 31 Abnormal condition Mode Selector set to gas, LP and CHECK light illuminated. Refrig- erator will not light the Burner, or the Burner lights for a few seconds and goes out. Probable Cause: A. Low input voltage B. LP turned off at main tank or shut-off valve C.
  • Page 32 B101 Abnormal Condition Mode Selector set to off, CHECK light illuminated. Probable Cause: A. Defective fluorescent light (see probable cause on page 5-31) B. Defective Power Supply C. Corrosion in cable connec- tors D. Defective cable Figure 5.68 Abnormal Condition Mode Selector set to GAS, LP light is not illuminated, refrigerator working on gas...
  • Page 33 Abnormal Condition Mode Selector set to AC ELEC, AC light is not illuminated, refrig- erator working on AC. Cause: Defective Eyebrow board Figure 5.71 Abnormal Condition Mode Selector set to DC ELEC, DC light is not illuminated, refrig- erator working on DC. Cause: Defective Eyebrow board Figure 5.72 Abnormal Condition...
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  • Page 38 This Manual is Compliments of Northwest RV Supply 86325 College View Road Eugene, OR 97405 Local: 541-746-9092 Toll-Free: 866-678-7467 Fax: 541-736-5573 http://www.nwrvsupply.com mail@nwrvsupply.com Northwest RV Supply carries a large spectrum of surplus, used, and new RV parts and components. Please feel free to visit our website for additional information.

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