Dometic Dometic M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om AES REFRIGERATOR DIAGNOSTIC SERVICE MANUAL The Dometic Corporation Corporate Office 2320 Industrial Parkway Elkhart, In. 46515 219-295-5228 Warranty Department 205 E. Fenn St. LaGrange, In. 46761 219-463-2191 Technical Services 509 S. Poplar St. LaGrange, In.
M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om TABLE OF CONTENTS Diagnostic Flow Charts No Operation . . . . No 120V AC Operation . No 12V DC Operation . No Gas Operation. . . . . . . . * . . . . . . . . . . . . . . . . . . . . . . A-5- 1 A-5-2 A-5-3 A-5-4 Operation and Diagnosis Dometic AES Refrigerators . . . . . . . A-6- 1 Glossary of Terms . . . . . . . A-7- 1 . . . . . . . .
AES REFRIGERATOR DIAGNOSTIC FLOW CHART NO OPERATION A. Correct coach wiring as necessary. (see pgs. A-6-23 to A-6-30 para. 7 9 - 8 4 ) Check supply voltage. M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om 1. Polarity 2. Battery supply 3. Wire size OK B. NOT OK Replace fuse as necessary (see pg. A-6-34, para. 9 6 ) N O T O K Replace thermostat as necessary (see pgs. A-6-34 t o A - 6 - 3 5 , para. 97- 100) Check fuse.
AES REFRIGERATOR DIAGNOSTIC FLOW CHART A. NO 120V AC Operation Correct coach wiring Check supply voltage. NOT OK t o A - 6 - 3 0 , para. 79-84) M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om 1. Polarity 2. Battery supply 3. Wire size Check AC voltage NOT OK OK Correct coach wiring and/or power source (breakers) as necessary (see pgs. A-6-22 to A - 6 - 2 3 , para. 75-78) C.
AES REFRIGERATOR DIAGNOSTIC FLOW CHART NO 12 VOLT DC OPERATION A. Check 1. 2. 3. supply voltage Correct coach wiring as necessary Polarity (see pgs. A-6-23 to A-6-30, Battery supply NOT para. 7 9 - 8 4 ) Wire size OK OK M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om B. Check that refrigerator is wired directly to 12V battery c. NOT OK OK Check for proper gauge wire in 12V installation D. I Correct wiring as necessary (see pgs.
AES REFRIGERATOR DIAGNOSTIC FLOW CHART NO GAS OPERATION supply voltage Polarity Battery Wire size Not OK - Correct coach wiring as necessary (see pgs. A-6-23 t o A - 6 - 3 0 , para. 79-84) 1 M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om Check 1. 2. 3. B. t i OK Disconnect supply line (see p g . A - 6 - 4 4 , para. 1 3 4 ) Check that 120V AC is not present at receptacle C.
AES REFRIGERATOR DIAGNOSTIC FLOW CHART M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om NO GAS OPERATION (continued) G. OK NOT OK Replace solenoid as necessary (see pgs. A-6-45 to A-6-46, para. 1 3 7 - l 4 0 ) NOT OK Replace parts as necessary and/or (See pg. A-6-47, para. 145- 1 4 6 ) Check solenoid H.
M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .
(1) M N an or ua th l Pr w Co es m i n ht te t tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om Welcome to the Dometic A.E.S. refrigerator training program. In this program we will discuss the features, operating sequences and diagnostic procedures for the Dometic refrigerators that are equipped with the Automatic Energy Selector Control system; A.E.S. for short.
(5) M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om Shown here is the RM1303 that is one of the models that make up the first generation A.E.S. refrigerators. The models in this series include from the smallest size to the largest size: the RM663 which is a 5 cubic foot refrigerator, the RM763 which is a 6 cubic foot refrigerator and lastly, the RM1303 which is an 8 cubic foot refrigerator.
M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om (9) It must be remembered that a DC wire hookup to the terminal block is required for any A.E.S. refrigerator to operate on 120 volts AC, 12 volts DC or LP gas.
M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om (13) Just above the burner assembly, located in the generator section of the cooling unit, are the 12 volt DC and 120 volt AC heating elements that provide the heat to the cooling unit on those modes. (14) By removing the two screws on the left side of the base assembly and one screw in the burner area, rotate the clamping plate clockwise to remove it.
M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om (17) This component replaces the piezo lighter that has been used on Dometic manually controlled refrigerators for several years. When the automatic controls select LP gas operation, 12 volts are sent to the igniter which produce a high voltage to create a pulsating spark at the burner. If for any reason the flame blows out, the igniter will re-light the flame at the burner.
(21) M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om To let the customer know that the switch is properly turned on and that there is sufficient DC power to energize the system, L.E.D. lamp will illuminate green. (22) After the refrigerator has reached the desired cabinet temperatures, the customer then can load the refrigerator with pre-chilled food.
M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om (25) When the driver gets in the vehicle and turns on the ignition key, the gas flame will shut off and the 12 volt heating element will be energized to operate the refrigerator while traveling.
(29) NOTE: The 120 volt mode is not affected by the delay cycle. Any time the refrigerator is supplied with 120 volts AC the unit will be fully operational on the AC mode, even if the refrigerator is in a delay cycle. THE 120 VOLT MODE IS NOT AFFECTED BY M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .
M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om (33) As we stated earlier, in normal operation the L.E.D. lamp will illuminate green. (34) On the LP gas mode, if a proper gas flame is not established within approximately 3 minutes, the lighting sequence will shut off and the L.E.D. will begin flashing red to warn the customer that the refrigerator has failed to light on LP gas.
M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om (36) Second, the control system incorporates a low battery protection circuitry that will prevent a total lack of cooling due to a gradual loss of 12 volts DC to the refrigerator’s terminal block. If the battery voltage to the terminal block drops to approximately 9.
M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om (39) The last feature that we need to discuss is the operation of the thermostat on the LP gas mode. Unlike the manually controlled models, A.E.S. refrigerators do not have a high and low flame to regulate the interior cabinet temperatures. The high flame, that is present after the lighting sequence, will shut off completely when the thermostat reaches the preset temperature.
M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om (42) The L.E.D. lamp assembly contains two separate diodes, one green and one red that are an integral part of the switch. (43) From the interior of the refrigerator we can see the thermostat-interior lamp assembly, which is similar to the thermostat assembly found on many residential type refrigerators.
M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om (46) Here we see the cut-off valve and the printed circuit board and its connections. (47) Next, we can view the igniter-reigniter, DC relay and just below these components is the LP gas solenoid valve. To the right of this is the orifice-burner assembly. (48) The third generation series models include: the RM3601, a 6 cubic foot refrigerator and the RM3801, an 8 cubic foot refrigerator.
M N an or ua th l Pr w Co es m i n ht te t tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om From the front there are two notable differences. The front upper decoration houses the mode switches as well as the L.E.D. lamp indicators that can give the customer useful information on what mode the refrigerator is operating on. Inside the refrigerator is the t h e r m o s t a t that contains the redesigned thermostat knob.
(54) M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om The customer can manually select the controls to operate on AC and LP gas only; again with AC having priority over the LP gas mode or the customer may select LP gas only. When the main switch is turned on the electronic control system will always select the fully automatic mode. At this time the A.E.S.
(57) If the gas only pushbutton is depressed the lamp will illuminate green and the refrigerator will only operate on the LP gas mode, even if 120 or 12 volts are available. M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om q (59) Anytime the customer wishes to know what source of heat the system is operating on, the question mark button may be depressed. The corresponding lamp will illuminate as long as the question mark button is pushed.
(61) M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om If the coach pulls into a gasoline station and the refrigerator is in a safety delay, the clock syymbol will illuminate. (62) Finally, if the unit is operating on LP gas, the gas symbol will illuminate. (63) As with other A.E.S. models, the third generation series has a flame failure indicator that will illuminate red if the system fails to light after approximately 3 minutes.
M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om (64) Another significant change in the third generation A.E.S. system is how the 12 volt heating element mode operates. As with the first and second generation series, the 12 volt heating element circuit is energized by the ignition lock terminal.
(67) If at any time while traveling the DC voltage reaches the approximate 13.3 threshold, the LP gas flame will shut off and the 12 volt heating element will energize, continuing normal operation on the 12 volt mode. TAG LINE ENERGIZED VOLTAGE -+ 13.3 V.D.C. (FOR 40 SEC. MIN.) M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .
(70) Secondly, suppose a customer has a properly wired RM3801 in a motor home that is equipped with a fully functional alternator. After the ignition key is turned on, the printed circuit board determines that at least 13.3 volts is available at the terminal block, so the 12 volt heating element engages. TAG LINE ENERGIZED VOLTAGE ---) 13.3 V.D.C. (FOR 40 SEC. MIN.) M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .
(73) If at any time the battery regains itself to the approximate 13.3 volt threshold during the 12 volt cooling mode, the controls will again reengage the 12 volt DC heating element. TAG LINE ENERGIZED VOLTAGE 13.3 V.D.C. (FOR 40 SEC. MIN.) M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om 12V ELEMENT ENERGIZES (74) As with the first and second generation series A.E.S.
(77) For proper cooling on the AC mode, the AC voltage to the refrigerator should not vary more than 10 percent from the voltage rating on the heating element. Heating elements used in Dometic refrigerators could have a rated voltage of 110 volts, 115 volts or 120 volts AC. Because of this, the power requirements for each differently rated heating element will vary. For example, if a heating element is rated for 100 volts, the acceptable power range would be between 99 to 121 volts AC.
M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om RATED VOLTAGE ON HEATING ELEMENT 110V 115V 120v AC OPERATIONAL RANGE - 121VAC 99 103.5 - 126.
As seen in the chart on page A-6-26, the gauge of wire required to the positive and negative connections on the terminal block will depend on the size of the refrigerator and the length of wire run from the house battery to the terminal block. This 12 volt circuit must be fused. The maximum fuse size should be 30 amps. M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .
M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om RECOMMENDED WIRE GAUGE AND LENGTH FOR AES MODEL REFRIGERATORS AWG 10 8 6 Maximum Wire Length RM3500 RM663 19 ft. 31 ft. 49 ft. RM3600 RM763 13 ft. 22 ft. 34 ft. RM3800 RM1303 N/A 19 ft. 31 ft. 1st and 2nd generation series models. AWG 10 8 Maximum Wire Length RM3601 17 ft. 27 ft. 3rd generation models. A-6-26 33 RM3801 17 ft. 27 ft.
M N an or ua th l Pr w Co es m i n ht te t tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .
AES REFRIGERATOR TECHNICAL DATA M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om 1ST GENERATION MODELS MODEL NO. COOLING UNIT PART NO. ORIFICE SIZE & PART NO. RM 663 928 3609 00/7 52 (200 7419 18/3) CORRECT FLOW METER READING .48 BTU INPUT BURNER 1226 A/C Heater HEATER E L E M E N T S P E C S . A C D C Resistance Watt/Volts , Part No. AMPS AMPS IN OHM’S Electric Thermostat PART NO. 210/120 292 05210012 0173738 048 1.8 17.
M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .
(84) If the 12 volt circuit is wired as shown on page A-6-31, the battery will not be able to properly filter the converter voltage. This could cause erratic operation or premature printed circuit board failure. Remember, the positive and negative DC power leads to the refrigerator must come directly from the battery. M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om (see page A-6-31) LP GAS SUPPLY - A.E.S.
M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .
(88) M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om If the refrigerator has not been used for some time or if the main supply tanks have just been refilled, air may be trapped in the LP supply lines. To purge this air from the lines may require resetting the refrigerator two or three times before normal gas operation will begin. (89) We will now take a look at the troubleshooting procedures for the A.E.S. models RM3801 and RM3601.
M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om (92) The first step to take is to insure that the 12 volt DC power supply and it’s associated wiring is providing the proper DC voltage to operate the electronic circuitry correctly. Remember without a proper DC hookup to the refrigerator’s terminal block, the unit will not operate on any heat source. (93) Check the incoming battery voltage at the terminal block to insure that between 10.
M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om (96) Check the 3 amp. DC fuse at the rear protection cover. If it is blown, check the 12 volt wiring on the coach and refrigerator for damage and repair, or replace if needed. When replacing the 3 amp. fuse do not substitute with an automotive quick blow type fuse, as it could needlessly blow during normal refrigerator operation.
M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om Remove the two thermostat leads and place them together using electrical tape. This will by-pass the thermostat from the electrical circuit. If the refrigerator begins operating when the leads are by-passed, the thermostat is defective and must be replaced.
M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om (103) Refer to the RM3801 switch diagnosis s e c t i o n o f the A.E.S. troubleshooting Diagnostic Manual for a detailed explanation on how to troubleshoot these switches. (See pages A-8-l to A-8-5) (104) The next component to diagnose is the solenoid valve’s internal winding. The A.E.S.
M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om (107) As in all of our troubleshooting steps, the printed circuit board is the last component to check for a failure. Insure that all of the connections on the board are clean and are inserted in their proper locations before attempting to determine if the printed circuit board is at fault.
(111) M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om After we have determined that the correct AC and DC power is available to the refrigerator, we need to diagnose the 120 volt heating element. Generally speaking, when a 120 volt heating element does not deliver the proper amount of BTU’s, it does not heat up at all. In some cases, however, a heating element may be just partially defective.
(115) Do not diagnose the heating element by checking only for continuity. A continuity check does not properly check the integrity of the element. If a zero ohms reading is indicated, an internal short is present in the heating element. Heater replacement would then be necessary. M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .
(118) M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om Next, diagnose the switch by following the switch diagnosis section of the A.E.S. manual which we have previously discussed. As a final check in our diagnosis of the 120 volt circuit, visually inspect the refrigerator power cord. If necessary check the cord end to end for continuity on the ground black and white wires that make up the power cord.
(121) M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om When beginning to diagnose the heating element circuit, keep in mind that an approximate DC voltage of 13.3 to the terminal block is required to engage to 12 volt DC heating element. Any voltage lower than 13.3 will prevent DC operation and the refrigerator will operate on the LP gas mode.
(125) M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om DC voltage should not be present between terminals 85 and 87 on the relay when the ignition key is disengaged. If voltage is present at these terminals the relay is defective and must be replaced. Next, energize the vehicle’s ignition switch and check for voltage between terminals 85 and 86 on the relay. Voltage should be present.
M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om (129) Measure resistance across the leads as outlined earlier in our program for the 120 volt heating element. The reading, however, will be different from the AC heating element. For the models RM3601 and RM3801 the ohms resistance should be .67, with a tolerance range of 10 percent.
M N an or ua th l Pr w Co es m i n ht te t tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om (132) To diagnose a gas operational problem be sure the refrigerator is in the A.E.S. mode. (133) The first diagnostic step is to be sure there are proper DC volts at the terminal block, in accordance with the previous explanation on the DC power source.
M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om (136) Now hook up a manometer to the test fitting and leave it in place until all checks have been made for gas operation. Turn the shut-off valve and refrigerator on and check for a gas pressure reading. A correct reading would be eleven (11) inches water column pressure. If needed, adjust the main gas regulator at the LP gas tanks.
M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om (139) You should hear a sharp click from the solenoid and now obtain a gas pressure reading. If these results are not realized the solenoid is defective and must be replaced. (140) If these results are correct you must next check the wires that connect to the solenoid voltage. The results should be close to the voltage coming to the appliance.
M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om (143) The next diagnostic step is to turn the unit off and then remove the high voltage wire from the igniter. When the unit is turned on you should hear a sharp clicking sound from the igniter. If no sound is detected, replace the igniter. When sound is present the igniter is good.
(147) M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om A very important function of the igniter assembly is to measure the condition of the flame. The flame completes the high voltage circuit and the spark stops when enough flame is present. (148) If all of the diagnostic steps have been completed with positive results and you are still experiencing lack of cooling, be sure the orifice, burner and flue tube have been cleaned.
M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om (151) If you require additional service assistance the basic requirements for the cooling unit operation or the A.E.S. control system, please refer to our manual refrigeration or A.E.S. training manuals. For day-to-day technical service assistance contact the technical service department.
AES Refrigerator GLOSSARY OF TERMS Automatic Energy Selector Refrigerators. First introduced in 1983, the 1st and 2nd generation series will automatically select the available heat source for operation (12OV AC, 12V DC or LP gas) by simply turning the refrigerator to the “ON” position. The 3rd generation series have the added flexibility of being utilized in three (3) individual selector switches, the refrigerator can be operated as a full AES, on 120V and LP gas only or gas operation only.
AES Refrieerator GLOSSARY OF TERMS continued M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om ELECTRODE - The angular piece of metal located just above the burner that is connected to the high voltage cable. High voltage “jumps” the air gap between electrode and burner, and creates the sparking seen at the burner. This circuit is grounded by the gas flame which stops the sparking produced by the igniter.
AES Refrigerator GLOSSARY OF TERMS continued M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om INDICATOR LAMP(S) - Consisting of light emitting diode(s) (L.E.D.) the 1st and 2nd generation series refrigerators will illuminate green when main switch is turned to the “ON” position. If refrigerator fails to ignite after trial for ignition sequence (2-3 minutes), the green L.E.D. will shut off and a red L.E.D.
AES Refrigerator GLOSSARY OF TERMS continued M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om MAIN SWITCH (1st Generation) - A rotary, two (2) position switch used to complete or interrupt main power circuit to the printed circuit board. This switch utilizes an “OFF” and “ON” position only. With switch turned “ON” the refrigerator will select and operate on the heat source available.
AES Refrigerator GLOSSARY OF TERMS continued M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om SWITCH/MODE INDICATOR BOARD (3rd Generation) - A more sophisticated version of the switch board. This switch assembly has three (3) separate pushbutton switches as well as the On/Off main slide switch.
AES Refrigerator GLOSSARY OF TERMS continued M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om THERMO-ELECTRIC SOLENOID VALVE - This device directly replaces the safety valve assembly found on the manually controlled refrigerators. When the AES selects LP gas operation, 12V DC is sent to the solenoid which opens the internal valve. This allows gas to flow onto the test plug and burner assemblies.
AES Refrigerator GLOSSARY OF TERMS continued approximately 1lV DC, the refrigerator will disengage the 12V heating element and initiate an approximate delay cycle. (See Delay Cycle). As with the 1st and 2nd generation models, the 3rd generation models will stay lit continuously on LP gas mode if voltage drops to approximately 9.5V DC. At this time the mode switch lamp will shut off to let the customer know DC voltage is low.
AES Refrigerator CONTINUITY READINGS FOR SWITCH CARD & HARNESS Model 3801 M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om The following is a list of checks that should be made on the switch card and harness assembly before replacing the switch card or wiring harness. These checks are to be done with wiring harness REMOVED from the printed circuit board. 1. ON-OFF SWITCH A.
AES Refrigerator CONTINUITY READINGS FOR SWITCH CARD & HARNESS continued 5. AC/GAS FUNCTION LAMP M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om Measure resistance between the brown terminal on the 10 pin connector to the gray terminal on the 10 pin connector. The proper resistance is approximately 65,000 O H MS. 6. GAS FUNCTION SWITCH A.
AES Refrigerator CONTINUITY READINGS FOR SWITCH CARD & HARNESS continued IO. DELAY MODE LAMP AND SWITCH M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om A. With the mode switch manually depressed, resistance should be indicated between the brown terminal on the 10 pin connector to the yellow terminal on the 7 pin connector. The proper resistance is approximately 2 1,000 OHM S. B.
AES Refrigerator CONTINUITY READINGS FOR SWITCH CARD & HARNESS continued Model 2802 M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om The following is a list of checks that should be made on the switch card and harness assembly before replacing the switch card or wiring harness. These checks are to be done with the wiring harness REMOVED from the printed circuit board. 1. ON-OFF SWITCH A.
AES Refrigerator CONTINUITY READINGS FOR SWITCH CARD & HARNESS continued M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om B. With the gas function switch NOT depressed, no continuity should be indicated between the violet terminal on the 10 pin connector to the orange terminal on the 10 pin connector. 5. GAS FUNCTION LAMP Measure resistance between the brown terminal on the 10 pin connector to white terminal on the 10 pin connector.
Operation of the AES System (Automatic Energy Selector) M N an o r ua th l Pr w Co es m i n ht te t tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om The control system on the AES selects the most suitable energy source. The selection will be made with highest priority to 120 volt, second priority to 12 volt from the alternator (if 12V DC is provided to the ignition lock terminal from the vehicle ignition switch) and lowest priority to gas operation.
Bulletin #46 continued The circuit board on the AES also has the ability to monitor the 12 volt supply voltage. If the incoming voltage to the refrigerator drops below 9.5 (+- 1) volts, the AES will switch to gas operation and the refrigerator will be unaffected by the thermostat. Until the low voltage situation is corrected, the system will remain on gas continually and will not switch to 120 or 12 volt and overcooling or freezing will probably occur. As a warning device.
Bulletin #46 continued M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om The thermostat used in the AES system is a normal electric thermostat without an off position. It operates on low voltage from the printed circuit board. If the thermostat is broken and has lost its charge, the refrigerator will not operate on gas, 120 or on 12 volt.
Bulletin #46 continued MAIN SWITCH ON/OFF SWITCH RM1303, 763, 663 M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om Models 1303, 763 663: The switch operates on 12 volts from the circuit board. In normal operation, the switch should travel only to the ON and OFF positions. A switch that travels more than this has been installed incorrectly or the installation nut that holds the switch in place has worked loose.
Bulletin #46 continued M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om In closing, there are two more external parts that can cause problems with your AES refrigerator. First, if your propane supply to your refrigerator is depleted, no cooling on gas will take place and the red indicator light will flash. When it is noticed that the indicator light is flashing red, always check your fuel supply first.
AES REFRIGERATOR WIRING DIAGRAMS 3 M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om 6RM 6 CIRCUIT B o a r d R E L A Y Terminal Blcok HEATER CONNECTORS MAIN SWITCH G A S F L A M E Warn.
AES REFRIGERATOR WIRING DIAGRAMS M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om RM1303 @ CIRCUIT B o a r d RELAY TERMINAL Block HEATER CONNECTORS @)- MAIN S W I T C H @ G A 5 F L A M E Warn.
CIRCUIT BOARD DIAGNOSIS M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om 6 / 1. IF THIS LEAD IS DAMAGED: LOOK FOR A SHORT CIRCUIT OR DAMAGE IN THE INTERIOR LIGHT CABLE. 2. IF THIS LEAD IS DAMAGED: LOOK FOR A SHORT CIRCUIT OR DAMAGE IN THE RIBBON CABLE TO THE MAIN SWITCH AND THERMOSTAT. 3. I F T H I S C O M P O N E N T I S DISCOLORED, BURNED OR BLOWN: CHECK ALL CABLES IN THE 12 VOLT SYSTEM FOR SHORT CIRCUITS. 4.
ometicl quality leisure line productr AUTOMATIC ENERGY SELECTOR M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om Our technicians continue to get calls from the field regarding the flashing red light on the A.E.S. Refrigerators indicating a lack of understanding. There can be times when the red light may flash, but there is nothing that has malfunctioned in the refrigerator.
Replacement of Circuit M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om 3-WAY AES CIRCUIT BOARDS RM3500,3600,3800 3 When working on an AES style refrigerator and replacing the circuit board, the old board should be visually inspected for any obvious damage, i.e. burned components, damaged leads, burned connectors, corrosion, etc.
Bulletin #R56/7A continued 3-WAY AES CIRCUIT BOARDS RM3501,3601,3801,4801 Check the old circuit board before installing a new one. If damages as shown below are found, the defects causing the circuit board breakdown M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om must be corrected before the new one is installed. The following paragraph numbers relate to the corresponding numbered items highlighted at the circuit board. /I 2 1.
Bulletin #R56/7A continued 2-WAY AES CIRCUIT BOARDS RM2602 AND RM2802 Check the old circuit board before installing a new one. If damages as shown below are found, the defects causing the circuit board breakdown must be corrected before the new one is Installed. M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om The following paragraph numbers relate to the corresponding numbered items highlighted at the circuit board.
REPLACEMENT OF CIRCUIT BOARDS Models: RM663 RM1303 RM763 Refrigerator Bulletin R58/7A April 1987 5/87 M U S T , upon inspection of the b o a r d , M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om When replacing the circuit board in the 663, 763 and 1303, you install the 12 Volt DC fuse provided. See Item #2, Page 2. Rev.
Bulletin #R58/7A continued b. Verify that the positive (+) 12V. DC wire going to the circuit board is connected directly to the coach battery positive (+) terminal. VEHICLE ENGINE M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om FIG. 2 2. The electrical system should also be checked to assure the 12V. DC circuit has been fused; if not, see the following procedure: Install the 12V.
Bulletin #R58/7A continued Lastly, the moisture shield kit has been enclosed and can be installed to prevent corrosion damage caused by water or car wash solution being sprayed into the back of the refrigerator The circuit board compartment should be sealed in the following through the vent louvers. manner: a. M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om b. Install the shield under the bottom mounting bracket of the cooling unit.
q AES MODELS RM3601 3801 MODULEBOARDREPLACEMENT D U O- TH E R M Refrigerator Bulletin R59/7A May 1987 1 NOTE: Please t a k e full consideration of the following information BEFORE replacing module boards d u e to faulty 12 volt cooling operation. M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om This Bulletin clarifies the 12 volt DC start-up and cooling operation. FIG.
(PRE- PDI D E L I VE R Y INSPECTION) M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om PDI insures safe operation of Dometic Refrigerators. The following checks on each unit are advised before being operated by the consumer. If each refrigerator is inspected according to these guidelines, you can be assured of peak performance from your Dometic refrigerator. GREEN OFF/ON SWITCH .... RM3500 RM3600 RM3800 3-Way RM1303 ..........
Bulletin #R60/7A continued AES PRE-DELIVERY CHECK FOR MODEL RM1303 AES REFRIGERATOR This refrigerator is equipped with an Automatic Energy Selector System. The selection will be made with the highest priority to 120 volts; second priority to 12 volts from the battery if the ignition is turned on; and with the lowest priority to gas operation. M N an or ua th l Pr w Co es m i n ht te t tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om I.
Bulletin #R60/7A continued AES PRE-DELIVERY CHECK FOR MODEL RM3500, RM3600, RM3800 NOTE: The above model numbers are upgraded versions of the AES system. 4. The refrigerator is equipped with a thermostat which is located inside the cabinet on the front of the light fixture. M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om Normal operation will be the same as first generation.
Bulletin #R60/7A continued AES PRE-DELIVERY CHECK FOR MODELS RM3601 AND RM3801 1. The AES automatically selects the best energy source for the situation, either 120 volts, 12 volts or LP gas. M N an or ua th l Pr w Co es m i n ht te t tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om 2. This unit will also let you select the energy source you want. 3. Pictured below is the AES control panel that is found on this generation of AES refrigerators.
Bulletin #R60/7A continued 9. When switch "B" is pushed, the control system will select only between 120 volts A/C and LP gas operation. To check, push question mark button “J”. Indicator light “E” should light up. B [AC/n 1 Wait 5 seconds, then switch back to ON. Flame failure indicator will go off, and system will start another cycle for ignition. K E? = AC cl -; - This light will come on when 13. Indicator “G”. The AES system goes engine is turned off.
Bulletin #R60/7A continued FREEDOM SERIES RM 2802 M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om (PDI) PRE-DELIVERY INSPECTION PDI insures safe operation of Dometic refrigerators. The following checks on each unit are advised before being operated by the consumer. If each refrigerator is inspected according to these guidelines, you can be assured of peak performance from your Dometic refrigerator. 1.
M N an or ua th l Pr w Co e i st m ht nte tp d R plim V :// F en w ro S w m up ts w pl o .n y f w rv su pp ly .c om GENERAL INFORMATION FOR MODELS RM2602 & RM2802 The refrigerator is equipped with an energy selector system. The system selects t h e m o s t suitable available energy source. The selection will be made with the highest priority to 120 volts and the lowest priority to gas operation. Once the low voltage has been corrected, the control system goes back to normal operation.
AES REFRIGERATOR DIAGNOSTIC SERVICE MANUAL OS1160-A Description Title Page Notes Table of Contents Notes AES Refrigerator Diagnostic Flow Chart / No Operation AES Refrigerator Diagnostic Flow Chart / No 120V AC Operation AES Refrigerator Diagnostic Flow Chart / No 12V DC Operation (Checks AES Mode Only) AES Refrigerator Diagnostic Flow Chart / No Gas Operation AES Refrigerator Diagnostic Flow Chart / No Gas Operation (continued) Operation and Diagnosis - Dometic AES Refrigerator Operation and Diagnosis - Do
OS1160-A AES Refrigerator Diagnostic Service Manual (continued) Description Operation and Diagnosis - Dometic AES Refrigerator (continued) Operation and Diagnosis - Dometic AES Refrigerator (continued) Operation and Diagnosis - Dometic AES Refrigerator (continued) AES Refrigerator Glossary of Terms AES Refrigerator Glossary of Terms (continued) AES Refrigerator Glossary of Terms (continued) AES Refrigerator Glossary of Terms (continued) AES Refrigerator Glossary of Terms (continued) AES Refrigerator Glossa
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