Diagnostic Service Manuals
Contents
1. flue pipe or other components that could damage the cord s insula tion Proper AC voltage for this style refrigerator is 120 volts 132 volts max L 100 volts min This voltage selection is made from the control panel on the front of the refrigerator The incoming AC voltage is applied to terminals J9 and J10 of the power supply module Lower PC board From there it goes to the necessary areas via the module board to perform the required function SECTION 2 AC COMPONENTS USE EXTREME CAUTION WHEN WORKING ON ANY AC ELECTRICAL COMPONENT OF THE REFRIGERATOR DISCONNECT AC POWER SOURCE TO REFRIGERATOR BEFORE REPLAC ING ANY ELECTRICAL COMPONENT AC VOLT AGES COULD CAUSE SEVERE INJURY OR DEATH 2 1 AC HEATING ELEMEN Disconnect the heating element from the terminals J7 and J8 on the power supply module Using an ohm meter set on the proper scale and read across the two wires you should get the following readings L11096 MODELS WATTS VOLTS OHMS 520 170 110 71 7 530 170 110 71 7 S620 300 110 40 3 5630 300 110 40 3 S820 300 110 40 3 5830 300 110 40 3 5619 300 110 40 3 S819 300 110 40 3 SERVICE MANUAL If the readings do not fall within this range the heating element is defective and should be replaced 2 2 AC POWER CORD Disconnect the power cord from the refrigerator and wall receptacle Using a VOM check for continuity Replace the cord is necessary SECTION 3 DC V2. DAAADARARRO 00 ARABER BWRRR BRRRW o Servel Silhouette Refrigerators mnenosre SERVICE MANUAL SYMPTOM 9 10 11 12 13 14 15 16 17 18 No operation Insufficient cooling on all modes Insufficient cooling on electric cools properly on gas Insufficient cooling on gas electric Freezes on all modes cools properly on Freezes on electric cools properly on gas Freezes on gas cools properly on electric On gas mode sparks while flame is lit Won t stay lit on gas LP flame yellow and not very high CAUSE AC volt Wiring Fuse Switch AC heater Lower PC board Level Ventilation Ambient temperature Thermistor Cooling unit AC volt Element Wiring Switches Thermistor Upper PC board LP gas pressure DC volts Solenoid Flue baffle Flue cap Flue tube Burner Orifice Thermistor Wiring Thermistor Upper PC board Lower PC board Lower PC board Lower PC board Solenoid Spark gap LP gas pressure Orifice Burner LP gas Sensor location Sensor wire Low voltage Ignition module Solenoid LP gas Orifice Flue and burner REFER TO SECTION OP 09 09 00 oho equ sp WANA Moos PPP BPBwOo0omoonsog PPPNN i SN NaH IHS DAT RRWARRO DOK ST
3. refrigerator lose efficiency but a poison ous gas can result The roof jack opening must be centered directly above the flue and condenser The vent must also be of proper size APPROVED ROOF JACK ROOF LEVEL px AREAS a b c amp d Lhe MUST BAFFLED ADOPENIG Rid TO PREVENT HOT FOR ROOF JACK Fagam GAS FROM POCKETING ABOVE Fg REFRIGERATOR CONDENSER FLUE 1 VENTILATION 1 ZONE f ABSORBER N TUBES Wai Wy 1 A LU OPENING FOR 0 CLEARANCE FLOOR LEVEL APPROVED FOR 0 CLEARANCE CONDENSER TOP VIEW Looking Down Through Opening CUT OUT FOR ROOF JACK FLUE Servel Silhouette Refrigerators POCKETS SHOULD BE BAFFLED FOR PERFORMANCE EFFI CIENCY ALTHOUGH NOT REQUIRED FOR CERTIFICATION SEAL See SIDE VIEW AIR FLOW CERTIFIED VENT KITS Number Cut Out 3100528 Plastic Roof Vent Base 5 x 24 3100529 Plastic Roof Vent Cap 2214 Lower Side Vent Kit 1 Includes Above Parts 8 2 LEVEL The Servel refrigerators do not require critical leveling such as required by other absorption type refrigerators Normal vehicle leveling to provide comfort for the occupants is satisfactory for refrigerator operation This will be well within the operation limits of 3 degrees off level side to side and 6 degrees off level front to back of the RV 8 3 D
4. ABLE SIDE MEW To determine if the temperature sensor is functioning properly perform the following test Remove the upper eyebrow PC board Disconnect the thermistor harness from the board Using an ohm meter set on the proper scale place one probe on each terminal point If the thermistor is at room temperature 70 to 75LIF you should get a reading of approximately 3000 ohms Next place the thermistor in a glass of ice water Wait 2 to 3 minutes Using an ohm meter place a probe on each terminal point You should get a reading of approximately 9000 ohms Normal failure for this type of device is to have a very high resistance A reading of 75 000 ohms or higher indicates the thermistor is defective and should be replaced A defective thermistor could cause an over cooling on 44 FLAME SENSOR WIRE The sensor electrode sends signal back to the ignition module to inform it that a flame has been established To check the sensor and wire follow these steps 1 Set ohm meter on highest scale 2 Disconnect wire to electrode 3 Check for continuity between the wire and ground Any reading indicates a defective electrode replace ss SENSOR Servel Silhouette Refrigerators 4 7 SPARK ELECTRODE SPARK GAP AND CABLE The function of this component is to supply a spark to the burner to ignite the LP gas
5. AGRAM GAS FRONT VIEW 3 WAY CONTROL PANEL ee RODE ACDC OFF GAS ELEC CHECK GAS COLD 1 2 3 4 5 COLOEST a E s eme ECTRODE La 14 THERMIBTOR 3 WAY CONTROL PANEL P C BOARD 12 acnosne SERVICE MANUAL SECTION 8 GENERAL INFORMATION 81 VENTING Installation must assure complete isolation ofthe living space of the recreational vehicle and the combustion System ofthe refrigerator Proper installation requires that one lower combustion air intake and one upper exhaust vent be installed Follow the proper installation information that comes with each refrigerator The lower vent must be flush or below bottom of refrigerator The cooling unit must receive a continual supply of air in order to maintain proper refrigerator cooling The air passage from the lower vent door to the refrigerator coils and from the coils up through the roof vent must be unobstructed If air becomes trapped by obstruc tions the refrigerator will start to lose its ability to cool Proper venting will create a chimney effect to insure adequate circulation It is important to block off the area above the refrigera tor cabinet from the venting zone Also air space at the sides of the refrigerator should be minimized to prevent pockets of hot air from forming Without adequate ventilation and or with partial block age of flue exhaust incomplete combustion on gas operation can cause carbon monoxide to form Not only does the
6. EP 7 TM DIAGNOSTIC SERVICE MANUAL Denver PIQUE Refrigerators REFER CAUSE SECTION STEP 19 Burner flame lifting ao urner alignment Clogged burner Orifice Flue baffle Flue cap 20 Burner hard to light Gas pressure Electrode Weak spark Ignition wire Burner alignment Orifice DC voltage 21 Gas valve chatters 12 volts Wiring Solenoid ae 22 Electrode puts out weak spark Electrode adjustment Electrode Electrode wire Ignition module 23 Rapid formation of frost Air leaks Food storage Cracked liner 24 Moisture on frame assembly Door seal Liner seal to frame High humidity o A w BOW 25 3 Way Models Only No DC operation DC volts Cools properly on gas and AC Heating element Switch Wiring Fuses Upper PC board 09 N 26 3 Way Models Only Insufficient cooling on DC DC voltage Cools properly on AC and gas Element Wiring Thermistor Venting OPP RW AMO 00O ee EO Silhouette Refrigerators SECTION 1 AC VOLTAGE REQUIREMENTS This refrigerator is equipped with a three prong plug for protection against shock hazard and must be connected into arecognized three prong receptacle The electrical cord should be routed in such a manner as to keep it away from the burner cover
7. OLTAGE REQUIREMENTS USE EXTREME CAUTION WHEN REPLACING DC COMPONENTS CAUTION MUST BE TAKEN IF DC SUPPLY IS NEAR LP GAS SUPPLY DC MAY ARC WHEN DISCONNECTING AND IF LP SUPPLY HAD A LEAK EXPLOSION COULD RESULT CAUSING SEVERE INJURY OR DEATH 3 1 PROPER DC VOLTAGE All Servel refrigerators require a DC volt supply even though some models are designed to operate on 120 volts AC and LP gas only A DC volt control circuit is required to maintain the automatic ignition This supply voltage should come directly from a battery The DC lead connections are at the back of the refrigerator Correct polarity must be observed when connecting to the battery supply For proper operation the DC voltage range is 11 minimum to 15 4 maximum IMPROPER CONNECTION WILL CAUSE IR REPARABLE DAMAGE TO THE CIRCUIT BOARD The distance the current must travel from the battery to the refrigerator dictates the AWG wire size to be used SEE CHART ON FOLLOWING PAGE SERVICE MANUAL min wire max fuse min wire size size size 0 20 6 Amp 12AWG 25Amp over 20 18 6 10 30Amp 820 min wire max fuse size size SECTION 4 DC COMPONENTS 41 UPPER BOARD If you have voltage into the power supply board see Section 4 2 and voltage out on P1 terminal 5 you should then check the wire harness for continuity If this check shows all wires having continuity the fault lies in the up
8. OOR SEAL AIR LEAKS These gaskets are magnetic and when the door is closed create a seal The purpose is to keep warm room air out of the refrigerator To test a door gasket seal place a dollar bill between the door gasket and the metal frame Close the door remove the dollar bill You should encounter some resistance Perform the same test on all four sides of the refrigerator door Any area that shows little or no resistance indicates a defect in the gasket Warm the refrigerator and using a hair dryer carefully warm the gasket in the area that did not make a good seal Close the door and let the seal return to normal room temperature If this does not correct the poor seal it will require replacement of the complete door 13 Silhouette Refrigerators 8 4 CRACKED LINER A mold mark should not be mistaken as a crack in the liner Make sure the crack is such that you can see a split in the plastic If in fact the liner is cracked it would be necessary to contact the company and follow their instruction on how to handle LINER SEAL TO FRAME There is a seal that is applied to the liner in the area where the metal frame makes contact with the plastic liner If this seal is incomplete cold air can migrate out to the metal frame and cause condensation to form 85 COOLING UNIT This is the heart of the refrigerator It creates the cold necessary to maintain stored food at a safe tempera ture It is a self cont
9. Proper alignment of the electrode to the burner 1 16 to 1 8 above the burner To check for acontinuity reading do the following test 1 Turn selector switch off 2 Disconnect the wire that goes to the electrode from the ignition module 3 With the volt ohm meter set on the proper scale check between the electrode wire and ground Any reading indicates a bad electrode Replace the electrode NOTE A weak spark or an ignition cycle of less than 10 seconds indicates a voltage supply problem to the refrigerator This should be corrected 48 DC VOLT HEATING ELEMENT Disconnect the heating element from J3 and J6 on the power supply module Using an ohm meter set on the RX1 scale read across the two wires of the heating element You should get the following reading Plus or minus 10 MODEL WATTS VOLTS OHMS 5620 225 14 87 830 225 14 87 530 150 14 1 30 If the element does not fall within the above range it is defective and should be replaced with a proper size Servel heating element NOTE If a precise ohm meter is not available a continuity reading will indicate an open or complete circuit If the test results show an open circuit replace the element onanosme SERVICE MANUAL 49 ON OFF SWITCH Incorporated in the upper PC board is an GAS switch Be sure it is NOT in the OFF position Also on models that have an interior light an ON OFF switch is on the lower PC board Be s
10. RATOR To reduce frost formation in and on the freezing com partment cover stored liquids and moist foods Do not leave door open any longer than necessary The coldest position in the refrigerator is underneath the cooling evaporator fins and at the bottom of the refrig erator The least cold area is on the upper door shelves This should be considered when different types of food are placed in the refrigerator 8 7 AMBIENT TEMPERATURE This is the temperature surrounding the RV as well as the back of the refrigerator As the ambient temperature goes up Lit will also raise the temperature in the area ofthe cooling unit Improper venting at this point will cause the cooling unit to have reduced efficiency therefore not allowing the refrigerator to get cold enough 8 8 HIGH HUMIDITY High humidity can have an effect on the amount of condensation that builds up on the main frame of the refrigerator In some cases it can develop to such a degree that it will run off the frame As the humidity is reduced the sweating will decrease DIAGNOSTIC SERVICE MANUAL Servet Silhouette Hefrigerators CONTENTS PAGE NO SERVEL SILHOUETTE DIAGNOSTIC FLOW CHART 1 SECTION 1 AC VOLTAGE REQUIREMENTS 4 SECTION 2 AC COMPONENTS 2 1 AG Heating Element 4 2 2 eds COI P 4 SECTION 3 DC VOLTAGE REQUIREMENTS 3 1 Proper DC Voltage esee eene en
11. Servel Silhouette Refrigerators SERVICE MANUAL This program will address the most common system problems associated with the Servel Silhouette supplied by The Dometic Corporation Our intent is to provide you with a guideline of checks to make should you encounter one of the following symptoms REFER TO SYMPTOM CAUSE SECTION STEP 1 No operation DC Volts Fuse Thermistor Upper PC Board Lower PC Board N 2 No operation of upper panel lights DC Volts Fuse ON OFF switch Wiring Upper PC board N 3 No operation panel lights are on Switch Thermistor Wiring Voltage Lower PC board 4 Noelectrical operation Voltage Heating element Thermistor Switch Wiring Lower PC board S 5 No gas operation spark DC volts Igniter ignition module Electrode and cable Upper PC board Lower PC board Solenoid valve Wiring Spark gap NS Po SN 0 6 No gas operation sparks but no flame Gas pressure Orifice Burner Shut off valve Solenoid valve Lower PC board 7 cooling on any mode Level Cooling unit ON 8 Nocooling on gas cools properly on electric LP gas pressure Upper PC board Ignition module Solenoid valve Orifice Burner Flue baffle amp flue tube Flue cap
12. ained unit and cannot be repaired if it fails The only recourse is to replace it If the operation of the cooling unit is in question we suggest you check to make sure you have a proper installation zero clearance on the sides top and 1 2 from combustible surface at back of refrigerator The unit should also be level Take a good heating element of proper wattage and install it in the cooling unit heater pocket Wire it direct to 120 volt AC Let the refrigerator run for ap proximately 12 hours The interior should be cold by that time If not you have a defective cooling unit and it must be replaced If you smell ammonia in or around the refrigerator the cooling unit is defective and must be replaced AUN AE ff ff ff 2 ZERO BLANKED OFF DOA NNN ZERO CLEARANCE ZERO CLEARANCE ZERO CLEARANCE GENER ONE GENES UD CES UNES UNE RD ER UM Ve NND 86 FOOD STORAGE Proper refrigeration requires free air circulation within the food storage compartment Restricted air circulation within this compartment will cause higher cabinet temperatures To correct this simply rearrange your food 14 SERVICE MANUAL items Never cover the shelves with paper or large storage containers they restrict air circulation Odors or highly flavored foods should always be stored in cov ered dishes plastic bags or wrapped in foil NEVER PUT HOT FOOD INTO THE REFRIGE
13. ator at 11 WC to the main burner Any pressure less than 11 WC can affect the operation of the refrigerator when on gas mode 5 1 HOW TO CHECK LP PRESSURE Hook up a manometer to the pressure test port at the back of the refrigerator Set the refrigerator to the gas mode and start the unit During ignition cycle you should get a gas pressure reading of 11 to 12 WC If your manometer reads higher than 12 inches water column or lower than 11 inches water column the gas system must be checked Make sure the gas system has at least 50 of the RV s BTU s on at the time the system is being adjusted A EEEE E a Oe a Servel Silhouette Refrigerators SECTION 6 LP GAS COMPONENTS 6 1 SHUT OFF VALVE The purpose of the shut off valve is to stop the flow of LP to the burner To check its operation hook up a manometer to the test port Apply pressure to sd manometer turn shut off A valve off If pressure drops to zero the shut off valve is good If pressure stays up any amount the shut off is defective and must be replaced Shut off Valve in the closed position C 62 ORIFICE 1 Remove the orifice and clean with an alcohol base solvent and let air dry DO NOT CLEAN THE ORI FICE BY USING A STRAIGHT PIN OR OTHER SHARP OBJECT Burner X me Orifice Q Copper Gasket Tube Compression Ring Gas Tube Connection EE cC Fitting Burner Supply Tube B
14. e sure the copper gasket and tube compression ring are in place when reassembly takes place 6 3 LP BURNER 1 Make sure burner is clean no spider webs carbon build up or rust 2 Make sure when reas sembly is being done that the burner is se cured properly in the housing BURNER ASSEMBLY After burner has been cleaned of any type of blockage make sure it is properly aligned when put back in housing Make sure the electrode and igniter are positioned prop erly See Sec 4 5 SIDE VIEW Mos SERVICE MANUAL 6 4 FLUE BAFFLE amp FLUE TUBE The purpose of the baffle is to slow the rise of heat when on LP operation Gain access to the baffle wire either by removing the roof vent or take the refrigerator out of the coach 1 Remove the baffle from the flue tube Using a flue brush clean the flue The flue brush part number is 0151404 001 2 Inspect the baffle If the end has burnt away it will be necessary to replace the baffle It is very important that you order the correct FLUE TUBE baffle for the refrigerator you are FLUE BAFFLE working on Rein stall the baffle and test unit for proper operation The following illustration will give you proper baffle length 18 3 16 S619 620 S630 819 820 830 520 530 The bottom of the flue baffle is 1 3 8 above burner on all models 6 5 FLUE CAP The flue cap is used to help prevent down drafts and hold the wire that the spiral ba
15. ene rd 14 8 6 Food Storage 5 er tU HEC 14 8 7 Ambient 14 8 8 qui eee eim brat bordes cse de da 14 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
16. enough AC volts should be present at J7 and J8 If not check to ensure that 120 volts exist on the incoming cord Unplug from board and check 6 SERVICE MANUAL If line voltage is present either the 5 amp AC fuse is open or the relay has not been activated If the fuse is open remove the board from the refrigerator and remove module board from cover Replace 5 amp fuse and remount board and wire back into system 5 AC RELAY To check the AC relay test between terminal 8 of the connector P1 and terminal J4 NOTE This is a DC voltage check If a voltage of less than 1 volt DC is present then check the 5 amp AC fuse If defective replace If the fuse is not open and 1 volt or less exists on P1 8 then the AC heater relay is defective and the lower PC board should be replaced If DC volts are present on the P1 8 terminal then check continuity of the low voltage harness Also check the temperature sensor See Section 4 6 Another check of the AC relay is to remove the power harness from P1 and temporarily ground P1 8 You should get an audible click and 120 volts should be present between terminals J7 and J8 AUDIBLE CLICK If these prove OK the fault is likely in the eyebrow board and it should be replaced The system should then be retested 7 DIAGNOSTIC SERVICE MANUAL Ser vel Silhouett Refrigerators 4 3 IGNITION MODULE IGNITER 45 FLAME SENSOR Before diagnosing the ig
17. ffle is attached to It is impor tant that the cap be positioned properly when unit is operating on gas 7 DIAGNOSTIC SERVICE MANUAL Ser vel Silhouette Refrigerators SECTION 7 WIRING 71 WIRING DIAGRAMS The wiring diagrams and connection diagrams should be followed when performing electrical checks either 12 volt DC or 120 volt AC The information supplied along with the color codes of the wires should allow for easy electrical repairs if necessary If wire replacement is necessary be sure you use the same size wire 0 it will carry the voltage load of that circuit Use the wiring pictorial and diagram that is on the refrigerator you are working on TYPICAL 2 WAY WIRING PICTORIAL IGNITION TO CHASSIS GROUND TERMINAL BLOCK n SWITCH J3 J5 LORAN INTERIOR LIGHT HEATER TYPICAL 2 WAY WIRING DIAGRAM FRONT VIEW 2 WAY CONTROL PANEL ELEC OFF GAS ELEC CHECK COLD 1 9 34 5 COLDEST 2 WAY CONTROL PANEL BOARD 7 TM poi ms houett SERVICE MANUAL efrigerators 7 1 Wiring Diagrams continued TYPICAL 3 WAY WIRING PICTORIAL ELEC GAS AC DC DK CK GAS TEMP Cont IGNITION FLAME MODULE LI SENSOR SPARK ELECTRODE TO CHASSIS GROUND TERMINAL BLOCK 12 VOLT DC SUPPLY DOOR SWITCH WHITE INTERIOR LIGHT DC HEATER J10 GREEN CHASSIS GROUND 120 VAC 60 HZ TYPICAL 3 WAY WIRING DI
18. he complete harness should be replaced To check the harness you should do a continuity reading on the harness LOWER PC BOARD WIRE HARNESS The low voltage harness should be checked for continu ity This should be done between the upper eyebrow connector and the lower PC board connector Lack of continuity between pins attached to the same wire indicates a defective wire Either repair the defect or replace the harness P 2 Eye Brow Board 1 Lower an i If the above procedure is positive and there is no operation of the upper PC board with the corresponding Switch in the proper position then the eyebrow board is defective and should be replaced 4 12 FUSE 3A 5A 20A ON 3 WAY MODELS Fuses are designed as a protection device for equip ment and user Never over fuse a circuit A defective fuse indicates high current draw or direct short to ground To check fuse remove it from the power supply module lower PC board and the 20 amp fuse from the refrig Servel Silhouette Refrigerators erator base 3 way models only Using a volt ohm meter remove the fuse from its holder and make a continuity check on the fuse If it is defective it will have to be replaced You will also have to find the cause for fuse failure Repair the failure replace the fuse and retest the system SECTION 5 LP GAS REQUIREMENTS The Servel refrigerator uses liquid petroleum LP that is supplied through a pressure regul
19. icle s DC volt supply should be present If not either the switch is defective or the 3 amp DC fuse F1 on board is defec tive Check continuity of fuse If good replace module board If the fuse is bad replace it Remember to find the cause of fuse failure STORAGE SWITCH IN THE ON POSITION Silhouette Refrigerators 3 DC VOLTS 1 8 PIN The next check is to disconnect the low voltage harness from the P1 connector at the lower left corner of the power supply module lower PC board storage switch on Probe between P1 terminal 5 and terminal U A voltage reading equivalent to the supply voltage should be present If not the power module should be replaced 4 LOWER PC BOARD AC CHECK USE EXTREME CAUTION WHEN WORKING THE AC ELECTRICAL COMPONENTS OF THE REFRIGERA TOR BEFORE REPLACING ANY ELECTRICAL COMPONENTS MAKE SURE THE AC POWER SUPPLY HAS BEEN DISCONNECTED FROM THE REFRIGERATOR ELECTRICAL VOLTAGES CAN CAUSE SEVERE INJURY OR DEATH The following procedure will help determine if the AC operation is functioning Set the switches on the eye brow board to the proper position electric and AC The AC indicator should illuminate If not refer to the INCOMING DC VOLTS Place the temperature selector into the coldest position with the refrigerator compart ment door open The AC heater relay on the lower PC board should be activated if the refrigerator cavity is warm
20. ne enn 4 SECTION 4 DC COMPONENTS 4 1 Upper PC Board scccsscescesenssrncersoceceesronesnsscnrensccesensenssssenses 5 4 2 rend PC Board He n 5 4 3 lannion Module S PEE 7 4 4 Flame Sensor 7 45 Flame SOM SOU 7 4 6 TNEIMIStOT naoui iser akka avia 7 4 7 Spark Electrode Spark Gap and 8 48 DC Volt Heating 8 49 On Off SWIICIL iiis reete peru ede e cease su sene s kae edat rap asc 8 4 10 LP Gas Components n aurou ne tne kenns 8 AANT WIFIDQ 8 4 12 Fuse 4A 20A on 3 Way 5 9 SECTON 5 LP GA UIREMENT 5 1 How to Check Pressure 9 SECTION 6 LP GA MPONENT 6 4 Shut Off Valve MP 10 62 EE EE E EE TTE 10 6 3 LP Burner Clogged amp 10 6 4 Fiue Baffle amp Flue 10 65 MR 10 SECTION 7 WIRING 7 1 Wiring Diagrams eene retis rares cona aaa tta erae n sene eden suras 11 SECTION 8 OTHER 8 1 ERR es ade 13 E 13 8 3 Door Seal Air Leaks 13 8 4 Cracked Liner e 14 8 5 Cooling r
21. nition module be sure the ON 1 Check for proper alignment to burner Sensor should OFF switch is on and the temperature sensor see Sec be in flame path 4 6 and upper PC board see Sec 4 1 are good 2 Check for cracked ceramic 3 Check for loose wire connection 4 Check for carbon build up Correct any burner errors replace any defective parts The ignition module has multiple functions During gas operation it performs the following Supplies voltage to ignition electrode B Applies DC volts to open gas valve C Senses flame through sensor electrode D E gt SPARK ELECTRODE If burner continues to burn it turns off spark 9 If unit fails to light within a given time 10 seconds it BURNER closes gas valve and lights check light red wire IGNITION MODULE CHECK A Remove ignition module check back of connection SENSOR strip corroded clean with a pencil eraser recon ee j ORIFICE nect to wire harness RINES S B Check for DC volts 11 to 15 4 at connector be wary i SPARK tween power supply and control module Power will be present for 10 seconds between blue wire P2 and green wire 0 P2 4 Also check the wire harness at the ignition module If you have proper DC volts at this connection replace defective ignition module If you do not have proper DC volts replace 46 THERMISTOR power supply lower PC board AIR HOLES NON ADJUST
22. per PC board and it should be replaced Upper PC Board i yl y Cot o c CONNECTION POINT CONNECTION POINT FOR MAIN WIRING HARNESS FOR THERMISTOR POWER SUPPLY NOTE This test is required to verify if voltage is going to the upper PC board Servel Silhouette Refrigerators When testing the refrigerator s operation make sure the thermostat is set to its coldest position When working with a unit that has an interior light make sure the storage switch on the rear of the refrigerator is turned on 4 2 LOWER PC BOARD The following procedure will help you determine if the refrigerator is receiving proper DC volts To perform the following test you will need a VOM set to read DC volts Gain access to the power board lower PC board and proceed to test in the following manner 1 INCOMING DC VOLTS On the power board lower PC board probe with a voltmeter between terminals J5 and 0 This is to ensure the vehicle s DC volt is connected to the refrigerator If there is a positive reading 11 to 15 4 continue on to the next test procedure If the reading is outside this range see Section 3 1 2 STORAGE SWITCH OPERATION The next test procedure is to make sure the storage switch is in the ON position NOTE Only interior lighted models have this storage Switch Using a volt meter probe between terminals J1 and J2 0 A reading equivalent to the veh
23. ure it is in the ON posi tion To check the switch on the lower PC board see Section 4 2 To check the switch on the upper PC board see Section 4 1 3 Way Models HEC CHECK GAS 12345 COLDEST LIII AC DC ELEC OFF GAS Cm 2 Way Models ELEC OFF GAS ELEC CHECK GAS COLD 12345 COLDEST 4 10 LP GAS COMPONENTS SOLENOID VALVE The solenoid valve is a DC volt activated valve To check this component you will need to perform the following tests 1 Hook up manometer at test port 2 Check for DC volts at gas valve terminals while unit is in trial for ignition If 11 volts or more is present and pressure is low replace valve 3 If DC voltage is not present at the valve replace ignition module 4 Valvechatters Low input voltage to valve Defective temperature sensor 4 11 WIRING WIRE HARNESS This unit has two wire harnesses Thefour wire harness goes from P2 on lower PC board to the ignition module gas valve circuit Theseven wire harness goes from the lower PC board P1 to the upper PC board Their purpose is to complete the necessary electrical connec tions between module boards mcnosne SERVICE MANUAL These wire harnesses are color coded for easy diagnos tic procedures If the pin connectors are in question and you have to tighten them care should be taken as these connectors are quite small and could be damaged If damage does occur t
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