Norcold 86 series Service manual
Contents
1. 10 Check the 3 amp fuse as shown in Figure 5 45 To be sure you have 12 volts DC across it If you do not have 12 volts replace the 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 11 With the volt meter set to measure DC check Points 1 2 and 3 shown in Figure 5 46 for 12 volts DC If you do not have 12 volts replace the Power Supply Note Be sure the storage switch is in the down position On and re member that the diodes will be numbered D6 and D7 on the origi nal power supplies 12 Reconnect the cable to the Power Supply 13 Remove the screws shown in Figure 5 47 and pull the Eye brow assembly away from the refrigerator o Li 4 Y 14 Remove the Eyebrow board from the Eyebrow as shown by Figure 5 48 15 Set the Mode Selector switch to the OFF position as shown by Figure 5 492. 615904B 120 VAC 60 Hz 2 WAY WIRING PICTORIAL MODELS 8686 8662 FRONT VIEW OF 2 VAY EYEBROW su AC CHECK GAS VRI GAS VALVE SPARK A las 3 ORO CLD lt gt ces i te gt a Jie SENSE ELECTRODE _ Fa sono HOT ilena NEUTRAL HUMIDITY SWITCH st eeu um HUMIDITY STRAE HEATER DOOR SVITCH oo Je m srowno y3 GAS Dis a Sac nearer EYEBROW BOARD POWER SUPPLY BOARD PART 616014C 88 03 2 WAY WIRING DIAGRAM MODELS 8662 amp 8682 5 34 7 GAS AC DC X LP TEMP ANNANN EYEBROW B ARD 3 WAY TEMP SENS SPARK ELECTRODE SENSE ELECTRODE UMIDITY SWITCH UPPLY C3 WA Y WHT YEL Bal DOOR SWITCH E 2 VDC FR M VEHICLE YE ERI
3. BLAC VDC FROM VEHICLE BLAC GREEN PART 616193 86 19 120 VAC 60 Hz FRONT VIEW 2 WAY EYEBROW CHECK GAS VRI COLD COLDEST OCHASSIS GROUND AC HEATER SPARK ELECTRODE SENSE ELECTRODE 2 WAY WIRING PICTORIAL MODEL 8652 IGNITION MODULE GAS VALVE SPARK ELECTRODE N2 SENSE lt ELECTRODE io 120 VAC HOT eps 120 VAC NEUTRAL rare EE 2 WAY EYEBROW BOARD 616195 86 16 5 36 Sac HEATER 2 WAY POWER SUPPLY BOARD 2 WAY WIRING DIAGRAM MODEL GAS IGNITION AC DC X TEMP MODULE AAA EBROW BOARD 3 WAY SPARK ELECTRODE INTER TEMP SENSOR CONNECT CABLE q EYEBROW SENSE ELECTRODE TO POWER SUPPLY VDC FROM VEHICLE 5 AMP HEATER FUSE SODNRGED GREEN O CHASSIS GROUND DC HEATER AC HEATER PART 616194 86 19 120 VAC 60 Hz 3 WAY WIRING PICTORIAL MODEL 8653
4. BLU REEN 20 AMP HEATER FUSE YEL HT BL BL SOMDYUNAGRAND GRN 615905B 120 VAC 60 Hz FRONT VIEW OF 3 WAY EYEBROW O CHASSIS GR su gt t OFF Wa 3 WAY WIRING PICT IGNITION MODULE 5 NA IDITY HEATE DELS 8683 amp 8663 GAS VALVE Serene 5 x 5 SENSE lt R4 er ema 15 1 ELECTRODE c AUMEDITY SVECI R3 Ges ea 1 Rea J15 2 STORAGE SVUICH H HUMIDITY HEATER T mM GROUND J5 l2vde 7 J15 8 J671 J15 4 Ges 13 6 AC HEATER EYEBROV BOARD PART 616015C 88 03 Ji6 3 5 35 POWER SUPPLY BOARD IC HEATER 3 WAY WIRING DIAGRAM MODELS 8663 amp 8683 GAS AC X LP TEMP AO AN NO EBROW BOARD 2 WAY INTER CONNECT CABLE EYEBROW POWER SUPPLY TEMP SENSOR IGNITION MODULE
5. FRONT VIEW 3 WAY EYEBROW AC DC CHECK GAS VRI IGNITION MODULE GAS VALVE SPARK 0000 Mo os lt lt SPARK e 12 1 SENSE lt lt ELECTRODE Tofu 8 gt gt gt 120 VAC NEURAL B A RIS wunne gt iik i 7 1 put 8 al N7 eee Zoe wenen w wink 3 5 gt gt 3 WAY POWER 3 WAY EYEBROW BOARD UJ SUPPLY BOARD PART NU 616196 86 12 3 WAY WIRING DIAGRAM MODEL 8653 5 37 Manual provided courtesy Bryant RV Services www bryantrv com All manuals are believed to be released for distribution and or in the public domain Service manuals provided with the understanding that persons using them are well versed in proper safety practices and are familiar with basic safety procedures including but not limited to safety procedures dealing with 120 volt electricity high amperage 12 volt circuits an LPG propane systems If in doubt consult a professional better safe than sorry www bryantrv com
6. 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 Note During times when the refrigera tor is not in use storage the HIGH HUMIDITY switch must be in the OFF position If the switch remains in the ON position a con tinuous amp draw may occur and result in battery run down The interior light switch turns on the light when the door is opened two door models only See sec tion about power supplies Power Supply Board There are three versions of the Power Supply board 1 The original version Power Sup ply board had a storage switch located on the left side of the board The storage switch elimi nates all 12 volt DC to the refrig erator when in OFF up posi tion A transformer was on the board which allowed the refrig erator to operate on AC without 12 volt DC being applied Note On refrigerators with the original version Power Supply board the storage switch must be in the ON down position in order to allow the refrigerator to operate in the GAS or DC mode and to allow the interior light and HIGH HUMIDITY circuit to operate When the stor age switch is in the OFF up posi tion the refrigerator will operate in the AC electric mode but not Gas or DC Modes Parts and Their Fu
7. B101 21 Check for 12 volts across the DC heater fuse as shown by Figure 5 61 If 12 volts is not measured the fuse is blown and must be replaced A 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 22 If 12 Volts DC is present check resistance of the DC Heater element as shown in Figure 5 62 If not within allowable speci fication see Technical Data section replace heater 5 29 Standard Heater early version Blue and White Leads Horizontal Burner Type current version 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 Normal Condition Mode Selector set to AC ELEC AC light illuminated and refrigera tor operating on AC Normal Condition Mode Selector set to DC ELEC DC light illuminated and refrigera tor operating on DC 5 30 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 LP pressure not adjusted correctly Air in the LP gas lines Gas valve did not open No sparks to the Burner Electrodes not adjusted c
8. 5 32 Abnormal Condition Mode Selector set to AC ELEC AC light is not illuminated refrig erator working on AC Cause Defective Eyebrow board Abnormal Condition Mode Selector set to DC ELEC DC light is not illuminated refrig erator working on DC Cause Defective Eyebrow board Abnormal Condition A Mode Selector set to off no lights illuminated refrigerator operating on DC Cause Defective Power Supply B Mode Selector set to off re frigerator operating on AC Cause Defective Power Supply C Mode Selector set to off re frigerator operating on LP gas Cause Defective Power Supply or the gas value is hung in the open position 5 33 GAS X LP TEMP A A ANAO EYEBROW BOARD lt 2 WAY SPARK ELECTRODE TEMP SENS SENSE ELECTRODE UMIDITY SWITCH Nee R UPPLY SWITCH 2 WAY YE 2 VDC FROM VEHICLE ERI HUMIDITY HEATE GRN OCHASSIS GR AC HEATER
9. 300 Watts 12 Volts DC control voltage DC Mode 3 Way only 12 Volts DC MODELS 8682 8683 RATINGS 1500 Btu Hr Input LP Gas Mode 11 W C LP16 Orifice 12 Volts DC control voltage AC Mode 110 Volts AC 300 Watts 12 Volts DC control voltage DC Mode 3 Way only 12 Volts DC CURRENT DRAWS 8652 8653 Automatic ignition Less than 250 milliamps or 25 amps AC Heating Element 1 5 amps at 110 Volts AC 1 7 amps at 120 Volts AC DC Heating Element 9 2 amps at 12 Volts DC 10 7 amps at 14 Volts DC CURRENT DRAWS 8662 8663 8682 8683 Automatic ignition Less than 250 milliamps or 25 amps Humidity Heater 240 milliamps or 24 amps Interior Lamp when door open 900 milliamps or 90 amps AC Heating Element 2 7 amps at 110 Volts AC 2 9 amps at 120 Volts AC DC Heating Element 13 8 amps at 12 Volts DC 16 1 amps at 14 Volts DC OPERATION WHERE THESE SPECIFICATIONS ARE EXCEEDED MAY CAUSE DAMAGE AND WILL VOID REFRIGERATOR WARRANTY 5 2 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 male quick connects are at terminals located on the Power Supply at the rear of the refrigera tor One terminal is marked positive and the other negative Correct polar it
10. A CIRCUIT CAN RESULT IN A FIRE 8 Reconnect the cable to the H Power Supply Set the Mode p Selector to OFF as shown in a Figure 5 29 9 Be sure the storage switch is in the down position as shown in Figure 5 25 original and third versions 10 Using the volt meter check for 12 volts DC at the locations 1 2 3 shown in Figure 5 26 11 If you do not have 12 volts 10 5 Volts min replace the Power Supply Note A two way Power Supply will not have the D 4 diode and the origi nal version diodes will be D 6 and D 7 12 Remove the screws shown in Figure 5 27 and pull the Eye brow assembly away from the refrigerator as shown 13 Remove the Eyebrow board from the Eyebrow shown in Figure 5 28 14 Do not disconnect the cable or Thermistor wire 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 has the L E D as shown 16 Connect a volt meter as shown in Figure 5 29 17 You should measure 12 Volts DC 10 5 Volts min at the emitter of Q11 18 If you do not have 12
11. DC across the terminals of the gas valve If 12 volts 10 5 volts min is present and the valve did not open replace the valve If wir ing is proper and 12 Volts 10 5 Volts min is not present replace the Ignition Module Note The valve will only have 12 volts when the flame is burning or dur ing a trial for ignition 28 If the Ignition electrode did not send sparks to the Burner check the electrode wire for continuity as shown in Figure 5 33 If Electrode wire shows continuity proceed to next step 1 8 MIN GAP 3 16 we SPARK 29 Check the alignment of the electrodes as shown in Figure 5 34 30 Check for a loose wire con aes nection at the electrodes and Ignition Module If all checks i a are proper and still no spark at j BURNER Burner proceed to next step igure 9 34 Proper Spark Gaps 31 Check the Sense and Ignition electrodes shown in Figure 5 35 for a short to ground A Turn the Mode Selector to OFF B Set the Volt Ohm meter to the Rx10K scale C Disconnect the wires to the electrodes D Check the continuity to ground E Any needle movement indi cates a defective electrode and it must be replaced 32 Reconnect the electrodes and set the Mode Selector back to gas 33 Make sure the main line LP gas is on
12. Disconnect the cable from the Power Supply 4 Remove the Power Supply cover to gain access to the Power Supply 5 Reconnect the 12 volt wires to terminals J4 and J5 6 Check for 12 volts DC as shown in 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 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 8 Reconnect the cable to the Power Supply 9 Remove the screws shown in Figure 5 56 and pull the Eye brow assembly away from the refrigerator 10 Remove the Eyebrow board from the Eyebrow as shown by Figure 5 57 HN Y 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 You s
13. Mode Selector switch is set to DC ELEC it completes the circuit to the coil of relay K 2 the relay contact closes and 12 Volts DC is ap plied to terminal J 6 of the Power Supply Current then flows through the 20 AMP fuse and on the DC heater Note DC operation will not initially cool down the refrigerator The initial cooling must be done in either the GAS or AC modes Trying to cool down the re frigerator in the DC mode will result in no cooling and battery run down 5 4 AC DC ELEC OFF GAS LEC CHECK GAS COLD COLDEST GAS E o LP EE Figure 5 3 AC DC ELEC OFF GAS LEC CHECK GAS COLD COLDEST AC Figure 5 4 AC DC ELEC OFF GAS CHECK GAS COLD COLDEST DC Coc Figure 5 5 AG DC OFF GAS ELEG CHECK GAS COLD COLDEST NO o__ OPERATION Figure 5 6 IMPORTANT INFORMA implies an adequate recharging means which can handle the demands of TION ON 12 VOLT DC OPERATION 3 Way models Only The 12 volt DC mode is not de signed for continuous DC opera tion only for short intransit peri ods when gas or AC sources are not available The 12 volt DC mode cannot be used for t
14. Note These checks cannot be per formed unless the Eyebrow board has the LED as shown 16 Connect a volt meter as shown in Figure 5 49 17 You should measure 12V DC at the emitter of Q11 If 12 volts is not indicated replace the wire harness 18 Set the Mode Selector to gas the voltage should now drop to 5 6 volts DC If it does not re place the Eyebrow board 19 Set the Mode Selector switch to OFF 20 With the volt meters negative lead at D12 as shown in Figure 5 49 check the switch terminals shown in Figure 5 50 21 You must have 12 volts on all the terminals shown If you do not have 12 volts the cable is de fective and must be replaced 22 Set the Mode Selector switch es to AC ELECTRIC Mode Use the Volt meter with nega tive lead still connected per Fig ure 5 49 and check Points B D and E as shown in Figure 5 50 You should measure approxi mately 2 Volts DC If not re place the Eyebrow Board wi inh COLDEST lt DCOLD GAS CHECK DC AC DELEC DCA B101 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 Sup
15. as shown in Figure 5 36 34 Check the manual shut off 35 36 37 38 valve shown in Figure 5 37 to be sure it is in the ON position Check the Burner and Orifice shown in Figure 5 38 for any obstructions Check the main line gas pres sure See gas pressure sec tion for 11 WC Check for corrosion on the pins of the Ignition Module as shown in Figure 5 39 Clean the pins with an eraser If the flame will not light and stay lit replace the Ignition Module 5 20 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 Is the refrigerator plugged into AC power 4 Do you have 12 Volts DC power to terminals J 4 ground and J 5 5 Do you have 12 Volts DC across the 3 amp fuse 6 Do you have 120 Volts AC across the 5 amp fuse 7 Did you check for loose wire connections or pinched wires 8 Is the modular connector on the wire harness cable plugged into the Power Supply board and the Eyebrow
16. bottom left of the refrigerator The 12 volts DC is necessary for the refrigerator to work on either LP GAS or electric operation The 12 volt power is then routed through the 3 amp fuse located on the Power Supply board then to the interior light and HIGH HU MIDITY circuit A resistor R3 acts to limit the maximum amount of current through the cable and Eye brow circuit Note When defective the temperature control circuit Thermistor can cause the food storage cabinet to over freeze The same result will occur when the Thermistor is disconnected from the Eyebrow board When the wiring harness is plug ged in the 12 volt DC is reduced to 5 6 Volts DC by a zener diode D12 or D13 located on the Eye brow board This 5 6 Volts DC is the control voltage for the tem perature control circuit Gas Mode When the Mode Selector switch is set to LP the indicator lamp will illuminate and 12 volts DC will be sent to the Ignition Module When the Ignition Module receives 12 Volts DC the Ignition Module will open the gas solenoid valve al lowing gas to flow to the Burner The Ignition Module will then send energy to the Ignition electrode to spark the Burner If the flame is established the Ig nition Module will sense the flame through the Sense electrode and cease the sparking at the Burner Operation If ignition did not occur after the trial for ignition the Ignition Module will stop sparking and automatically c
17. A008 Table of Contents Page 5 2 5 3 5 4 5 5 5 5 5 7 5 8 5 15 5 30 5 34 5 35 5 36 5 37 Norcold Repair Guide Section 5 Models 865 866 868 General Information and Specifications 5 2 Operating Limits All Models 5 2 Ratings Electrical Connections 12 Volts DC Electrical Connections 120 Volts AC Description of Operation 5 4 Control Description 5 4 LP Gas Mode 5 4 AC Electric Mode 5 4 DC Electric Mode Operating and Lighting Instructions Important Information on 12 Volt Operation Location of Controls Parts Function Troubleshooting 5 15 LP Gas Mode of Operation 5 21 AC Electric Mode of Operation 5 26 DC Electric Mode of Operation Illustrations of Normal and Abnormal Conditions Wiring Diagrams 2 Way 8662 8682 Wiring Diagrams 3 Way 8663 8683 Wiring Diagrams 2 Way 8652 Wiring Diagrams 3 Way 8653 5 1 General Information and Specification OPERATING LIMITS ALL MODELS AC Mode 132 VAC Max 108 VAC Min 15 4 VDC Max 10 5 VDC Min DC Mode 15 4 VDC Max 11 5 VDC Min Gas Mode 11 W C 15 4 VDC Max 10 5 VDC Min MODELS 8652 8653 RATINGS 1200 Btu Hr Input LP Gas Mode 11 W C LP14 Orifice 12 Volts DC control voltage AC Mode 110 Volts AC 170 Watts 12 Volts DC control voltage DC Mode 3 Way only 12 Volts DC MODELS 8662 8663 RATINGS 1450 Btu Hr Input LP Gas Mode 11 W C LP16 Orifice 12 Volts DC control voltage AC Mode 110 Volts AC
18. DC being supplied to terminals J 4 ground and J 5 9 Is 3 amp fuse good Located un der Power Supply board Cover 10 Is storage switch located on the Power Supply board in the On position 11 Is the modular connector on the wire harness connected at the Power Supply board and the Eyebrow board 12 Is Mode Selector set to LP Step by Step Trouble Shooting Guide L P GAS Mode Of Operation 1 Check the 12 volt DC input to the Power Supply as shown in Fig ure 5 23 Refrigerator must have 12 Volts to operate in any mode Troubleshooting OPERATION USE EXTREME CAUTION WHEN REPLACING ANY DC ELECTRICAL COMPONENTS CAUTION MUST BE TAKEN WHEN DISCONNECTING THE DC SUPPLY THE DC SUPPLY IS CLOSE TO THE PROPANE GAS SUPPLY TO THE REFRIGERATOR ARCING CAN EXIT WHEN DISCONNECTING THE DC SUPPLY WHICH CAN IGNITE A LEAK IN THE PROPANE SUPPLY LINE RESULTS CAN BE SEVERE ELECTRIC SHOCK OR DEATH 5 15 2 Remove the wire connections from the Power Supply terminals 3 Disconnect the cable from the Power Supply 4 Remove the Power Supply cover to gain access to the Power Supply 5 Reconnect the DC supply wires to terminals J 4 and J 5 6 Check for 12 volts DC at the 3 amp fuse as shown in Figure 5 24 7 If you do not have 12 volts as shown Replace the 3 amp fuse NEVER OVERFUSE A CIRCUIT REPLACE BLOWN FUSE WITH EXACT REPLACEMENT INDICAT ED BY NORCOLD OVERFUSING OF
19. Mode Selection at the Eyebrow the Power Supply outputs power to operate the refrig erator in the proper mode 1 12 volts DC to the Eyebrow board through the cable 2 12 volts DC to the Ignition Module when LP is selected 3 12 volts DC to the DC heater 3 way only when DC is se lected 4 12 volts DC to the interior light and High Humidity heater 5 120 volts to the AC heater when AC is selected Cable Connects the Power Supply to the Eyebrow Board Eyebrow Board Selects the mode of operation owners choice indicates the mode of operation determines the operating temperature and indi cates when a trial for ignition fails Note On some Eyebrow Boards the AC Indicator light will illuminate even though AC is not connected However the refrigerator cannot cool in this mode without AC being connected Also a red light may be visible at times through the Thermostat slide opening this light is for Production testing only This information applies to the following models Use this information as a guide 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 igure able 5 10 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 th
20. as the capability to maintain the temperature for a short duration 5 13 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 TYPE C THERMISTOR ys ee THERMISTOR LOCATION FIFTH FIN FROM RIGHT PART 61689122 r CLIP J 5 14 0 61693822 THERMISTOR IMPORTANT The trouble shooting procedures which follow require that each check be performed in sequence Conclu sions made at any point in the pro cedure presumes that all preceding steps have been followed 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 2 Is the refrigerator being operated in a comfortably level position 3 Do you have 11 water column pressure LP pressure tap point lo cated at the rear of the refrigerator at the 12V solenoid valve 4 Is the combustion chamber which houses the spiral baffle clean and free from obstruction 5 Is the spiral baffle in place 6 Is the Burner Orifice clean and the correct size 7 Have you checked all electri cal connections 8 Is 12 Volts
21. board 9 Is the Mode Selector set to AC ELEC 10 Is the AC heater element the proper voltage and wattage Step by Step Trouble Shooting Guide AC Elec tric Mode of Operation AC OPERATION USE EXTREME CAUTION WHEN WORKING ON THE AC ELECTRICAL COMPO NENTS OF THE REFRIGERATOR BEFORE REPLACING ANY ELEC TRICAL COMPONENTS DISCON NECT THE AC POWER SOURCE TO THE REFRIGERATOR ELEC TRICAL VOLTAGES CAUSE SE VERE INJURY AND DEATH 1 Check the 120 volt AC supply as shown in Figure 5 40 2 Check for 120 volts AC across the power cord as shown in Figure 5 41 If you do not have 120 volts the power cord must be replaced 3 Check the 12 volt DC input to terminals J4 and J5 as shown in Figure 5 42 If you do not have 12 volts repair the 12 volt supply 4 Remove the cable from the Power Supply shown in Figure 5 43 5 Remove all the wires from the terminals on the Power Sup ply 6 Remove the Power Supply cover to gain access to the Power Supply 7 Reinstall the AC and DC in puts to their terminals on the Power Supply 8 Check for 120 volts across the 5 amp fuse as shown by Fig ure 5 44 9 You should have 120 volts as shown 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
22. he initial pull down of the refrigerator compartment s The initial cooling operation must be done in either the GAS or AC modes The refrigerator must be cooled and stabilized before the DC operation is effective Good battery condition is essen tial when operating on DC This the refrigerator along with other loads The wires from the battery to the refrigerator must be of large enough size to handle the load The connections must be clean tight and free from corrosion If not a resulting voltage drop will cause a decreased cooling capacity The following points regarding the DC operation should be considered a Operate the refrigerator in the DC mode only in periods when AC or GAS operation is unavailable b The DC operation is designed to operate during a short hold over pe riod such as a four 4 to six 6 hour period while in transit The refrig erator should not be switched to the DC mode if the food is not com pletely chilled c Good battery condition is essential when operating on DC This implies an adequate recharging means which can handle the demands of the refrigerator along with other loads d The wire from the battery to the refrigerator must be of large enough size to handle the load The connections must be clean tight and free from corrosion If not a resulting voltage drop will cause a decreased cooling capacity 5 6 Location of Controls Models 865 866 868
23. hould measure 12 Volts DC at the emitter of Q11 A If you do not have 12 volts replace the wire harness 14 Set the Mode Selector to gas The voltage should now drop to 5 6 volts DC If it does not replace the Eyebrow board 15 Set the Mode Selector switch to off 16 WWith the voltmeter s negative lead connected as shown in Figure 5 58 check the switch terminals shown in Figure 5 59 17 YYou must have 12 volts on all the terminals shown If you do not have 12 volts the cable is defective and must be replaced 18 Set the Mode Selector switch es to DC ELECTRIC Mode Use the volt meter with negative lead still connected per Figure 5 58 to check Points B C and D as shown in Figure 5 59 You should measure ap proximately 2 volts DC If not re place the Eyebrow Board 19 Set the Mode Selector to DC ELEC 20 Check the DC heater termi nals on the Power Supply for 12 volts as shown in Figure 5 60 J 3 is J 6 is If 12 volts is not measured replace the Power Supply TS D CHECK DC AC DELEC DC lt
24. lose the gas valve The Ignition Module will then send 12 Volt power to the Eyebrow board and illuminate the Red X CHECK lamp indicating ignition failure AC Mode 120 Volts AC is supplied to the Power Supply on terminals J 9 and J 10 by the AC power cord when it is plugged into an active AC receptacle The neutral side of the AC J 9 is tied directly to terminal J 8 of the Power Supply and to the AC heater when connected The hot side is routed through a 5 amp fuse to the normally open contact of relay K 1 The relay is energized by the 12 volt control voltage from the Temperature Control circuit When the Mode Selector switch is set to AC ELEC the temperature con trol circuit will complete the circuit of relay K 1 coil and the relay contacts will close The hot side of the 120 Volts AC will be applied through the relay contacts to the AC heater terminal J 7 DC Mode Three Way Models Only When 12 Volts DC is supplied to terminals J 4 ground and J 5 12 Volts DC of the Power Supply the power is routed directly to the normally open contact of relay K 2 and through the 3 AMP fuse to the storage switch for the interior light and HIGH HUMIDITY circuits then to the coil of relay K 2 The 12 Volt power is routed through the wiring harness to the Eyebrow board The zener diode D 12 or D 13 on the Eyebrow board reduces the 12 Volts DC to 5 6 Volts DC which is the control voltage within temperature control circuit When the
25. nction 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 Note On refrigerators with the second version Power Supply board the 12 volt DC must be disconnected from the Power Supply board to eliminate a constant current draw of 15 to 20 milliamps Failure to disconnect the 12 volt DC during times which refrigerator is not in use storage can cause battery run down See the identification of Power Supply versions below 3 On the third version of the Power Supply board 12 volt DC must be supplied in order for the refrigerator to operate in any mode The storage switch was added back to the board but the switch itself will not totally eliminate the 12 volt DC to the refrigerator when in the OFF up position Note The storage switch will eliminate current to the interior light and HIGH HUMIDITY circuit only To eliminate current draw turn the storage switch and the Mode Se lector switch to the OFF position For added protection against bat tery run down disconnect the 12 volt DC from the Power Supply board See the identification of Power Supply versions below Power Supply Versions by Model amp Serial Number 5 9 Power Supply Board Function In response to the
26. or rectly Orifice amp Burner obstructed Loose or corroded connec tion J Defective Ignition Module O Omnmmo T Abnormal condition Mode Selector set to gas LP and CHECK light Illuminated and the Flame is Burning Probable Cause A Low input voltage B Corrosion in the cable con nectors C Moisture on the Eyebrow board D Defective Ignition Module E Defective cable Abnormal Condition Mode Selector set to AC ELEC AC and CHECK lights are illumi nated Probable Cause A Defective fluorescent light 1 Turn off all fluorescent lights If the CHECK light goes out one of the fluorescent lights is de fective 2 Replace the light or wire the refrigerators 12 volt DC input to the battery B Corrosion in the cable con nectors C Defective Power Supply D Defective cable 5 31 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 Abnormal Condition Mode Selector set to GAS LP light is not illuminated refrigerator working on gas Cause Defective Eyebrow board Abnormal Condition Mode Selector set to GAS LP light is illuminated the flame did not light and the CHECK light is not illuminated Probable Cause A Defective Eyebrow board B Defective Ignition Module C Defective cable
27. ply 24 If 120 Volts AC is present check resistance of AC Heater element as shown in Figure 5 52 If not within the allowable specification see Technical Data section replace with one of the correct size and wattage AC amp DC Supply connected but not shown L 111 Standard Heater early version Two Black Leads Horizontal Burner Type current version Problem solving steps DC Electric Operation Answer these questions before calling Norcold s Technical Service Number 1 Remember this mode of op eration is not designed to cool the refrigerator 2 Do you have 12 Volts DC to ter minals J 4 ground and J 5 3 Is the 3 amp fuse located un der the Power Supply board cover good 4 Do you have 12 Volts DC to the 20 15 amp fuse 5 Did you check for loose wire connections 6 Is the modular connector on the wire harness cable plugged into the Power Supply board and the Eyebrow board 7 Is the Mode Selector set to the DC mode of operation Step by Step Trouble Shooting Guide DC Elec tric Mode of Operation 1 Check for 12 volt DC at termi nals J4 and J5 on the Power Supply as shown by Figure 5 53 If 12 volts is not present repair the 12 volt supply 2 Remove the wires from the Power Supply terminals 3
28. rough the Sense electrode 4 When the Burner ignites and stays lit the Ignition Module turns off the spark 5 When the Burner does not ig nite or it ignites and goes out when the sparking stops the Ignition Module will close the gas valve turning off the gas supply to the Burner and illu minate the red CHECK light Gas Valve Assembly The gas solenoid valve opens when 12 volts is supplied and closes when the 12 volts is re moved When it is open LP gas will flow to the Burner The manual shut off valve allows the gas supply to be turned off to the refrigerator Orifice Applies the correct amount of LP gas to the Burner provided the main line pressure is correct Burner Applies heat to the cooling unit when it has the correct amount of LP gas and air Ignition Electrode Sparks the Burner to ignite the flame when supplied with energy from the Ignition Module Sense Electrode Senses the heat of the flame and tells the Ignition Module if a flame is present or not Burner AC Heating Element Applies specific amount of heat to the cooling unit providing 120 volts AC is present to the refrig erator DC Heating Element Applies specific amount of heat to the cooling unit providing the DC input voltage is correct The DC Heating Element does not have the capability to cool the re frigerator from an initial start but h
29. volts re place the cable 19 Set the Mode Selector to GAS The voltage should now drop to 5 7 volts DC 20 If it does not replace the Eye brow board 21 Set the Mode Selector switch to OFF 22 With the volt meters negative lead connected as shown in Figure 5 29 check the switch terminals shown in Figure 5 30 23 There must be 12 volts on all the terminals shown If you do not have 12 volts the cable is defective and must be replaced 24 Set the Mode Selector to Gas Mode With the Volt meter negative lead connected as shown in Figure 5 29 check Point A shown in Figure 5 30 You should measure approxi mately 5 Volts DC If not re place the Eyebrow Board canoe m B CHECK DC AC DELEC DC lt 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 26 If you have 12 volts and the gas solenoid valve did not open or the Ignition electrode did not spark the Burner pro ceed to next step 27 Check for 12 Volts
30. y must be observed when connecting to the DC supply Do not use the chassis or vehicle frame as one of the conduc tors Connect two wires between the re frigerator and the DC supply The distance the current must travel from the battery to the refrigerator dictates the AWG wire size to be used Should the wire be too small for the distance a voltage drop will result In the case of 3 way models the voltage drop affects the wattage output of the cartridge heater and re sultant refrigerator performance See the adjacent wire and fuse chart for the correct wire and fuse size Electrical Connections 120 Volt AC All Norcold refrigerators are equipped with a three prong plug for protection against shock hazard See Figure 5 2 They must be connected into a recog nized three prong attachment recepta cle The cord must be routed so as not to come in contact with the Burner cover flue pipe or any other component that could damage the cord insulation DO NOT REMOVE CUT GROUND ING PRONG FROM THE REFRIG ERATOR AC POWER CORD RE MOVAL OF THIS PRONG CAN RE SULT IN A SEVERE ELECTRICAL SHOCK AS WELL AS VOIDING THE REFRIGERATOR ELECTRICAL CER TIFICATION AND WARRANTY EX TENSION Recommended Volt Connection CORDS ARE NOT RECOMMENDED Control Description Models 865 866 and 868 require that 12 volt DC be connected to terminals J 4 and J 5 of the Power Supply board located at the rear
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