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10.5 Shut off arm

The shutoff arm is cam driven. It operates a switch to con-

trol the quantity of ice produced. During the ejection cycle 

the arm is raised and lowered during each of the two revo-

lutions of the timing cam. If the shutoff arm comes to rest 

on top of the ice in the storage bin during either revolution, 

the switch will remain open and stop the ice maker at the 

end of that revolution. The arm has a manual shutoff built 

into the linkage; by raising the arm as high as possible, it 

will lock in that position until forced down. If the arm and 

switch do not operate properly, check for damage and re-

pair or replace parts as necessary.

10.6 mold Switches

The  three  switches  are  single-pole,  double-throw  style. 

They  are  identical  and  interchangeable.  The  holding 

switch assures completion of a revolution once a cycle 

has  started.  The  water  valve  switch  opens  the  water 

valve during the fill stage of the cycle. NOTE: This is the 

only adjustable component of the ice maker. If you use a 

double throw switch, DO NOT use the N.O. terminal. The 

shutoff switch stops the ice maker’s operation when the 

storage bin is full.

10.7 timing motor

This is a low-wattage, stall-type motor which is geared to 

the timing cam and ice ejector. It is a one RPM motor. To 

check the motor, disconnect power to the appliance and 

test for continuity between the two leads. If you DO NOT 

have continuity, replace the motor. If you have continuity 

and the motor runs, DO NOT replace.

10.8 Water Valve

This  valve  is  solenoid  operated.  When  it  is  open,  it  re-

leases  water  from  the  source  to  the  mold. The  amount 

of  water  is  proportional  to  the  length  of  time  the  water 

valve switch is held closed by its timing cam. Disconnect 

power  to  the  appliance,  remove  the  wires  to  the  water 

valve solenoid coil, and check for continuity between the 

two terminals. The ohms should be between 200 to 500. 

If you have continuity, the solenoid is good. It takes 10-15 

watts to energize the solenoid coil. The mold heater and 

coil are in series. When the mold heater is activated, this 

causes the voltage to drop to about 105 VAC at the coil. 

The valve has a flow washer inside which acts as a pres

-

sure regulator. A strainer is installed to prevent dirt, rust, 

etc, from entering the valve. Check for any debris which 

might obstruct the flow of water, or prevent the valve from 

closing completely when the circuit is not energized. Re-

move  any  obstructions.  If  the  valve  still  fails  to  operate 

properly,  replace  it.  If  the  valve  has  been  cracked  from 

freezing this would not be a warranty item.

Summary of Contents for RM3962

Page 1: ...RM 3962 USA SERVICE OFFICE Dometic Corporation 2320 Industrial Parkway Elkhart IN 46516 574 294 2511 CANADA Dometic Distribution 46 Zatonski Unit 3 Brantford Ontario CANADA N3T 5L8 519 720 9578 Form N...

Page 2: ...dicates a potentially hazard ous situation which if not avoided may result in minor or moderate injury When used without the safety alert symbol indicates a potentially hazardous situation which if no...

Page 3: ...10 SECTION 5 DC COMPONENTS 5 1 Thermistor 11 5 2 Solenoid Valve 11 5 3 Igniter 11 5 4 High Voltage Cable 12 5 5 Electrode 12 5 6 Control Panel 12 5 7 Climate Control Heater 12 5 8 LED Display Panel 13...

Page 4: ...ty 21 SECTION 9 WIRING 9 1 Internal Wiring 23 9 2 External Wiring 23 9 3 Wiring Schematics 23 SECTION 10 ERROR CODES 10 1 Codes 23 SECTION 11 DIAGNOSTIC MODE 11 1 Internal Wiring 23 SECTION 12 ICE MAK...

Page 5: ...9 3 page 10 5 page 13 6 page 16 7 page 16 7 page 17 7 page 17 7 page 17 5 page 13 5 page 12 5 page 14 4 page 10 CAUSE Operation DC Volts Fuse Wiring Control Panel LED Display Board Lower Circuit Board...

Page 6: ...page 16 5 page 13 5 page 14 section 9 page 23 5 page 15 8 page 21 8 page 21 8 page 20 8 page 21 8 page 20 8 page 20 8 page 21 8 page 20 5 page 12 CAUSE DC Volts Wiring LP Gas Manual Gas Valve Solenoi...

Page 7: ...AUTO GAS Mode Selector Button Press the button to turn the auto mode on or off 3 TEMP SET Button The thermostat has 5 settings where 1 indicates the warmest and 5 the coldest temperature setting Pres...

Page 8: ...dication dot is lit AUTO mode and AC operation The AUTO and LP indication dots are lit AUTO mode and GAS operation The LP indication dot is lit Manual gas operation mode Digits E G Fresh food temperat...

Page 9: ...not continue to reset GAS operation if the CHECK indicator lamp continues to be illuminated after several tries AUTOMATIC ENERGYSELECTORCONTROL SYSTEM The refrigerator is equipped with an automatic en...

Page 10: ...pproximately 45 sec onds with two minutes purge interval after each trial If unsuccessful the display will flash LP To restart GAS operation press the main power ON OFF button to the OFF and then ON p...

Page 11: ...ation of the Dometic refrigerator is also depen dent on good clean ground connections Loose or corrod ed ground terminals create a unknown resistance factor that can affect the voltage detected by the...

Page 12: ...igniter stops sparking The resistance is monitored by the igniter and if for any reason the flame goes out the igniter begins sparking until the burner is lit The resistance between the electrode and...

Page 13: ...always loosen the screw and move into place never try to move without loosening the screw On newer units the electrode and high voltage cable are in tegrated into one component To acquire the proper...

Page 14: ...n not used on this model TAG Line J12 Low ambient control J6 AC neutral White J7 AC heater J5 AC Hot Black J8 AC heater J9 Positive wire from thermocouple J10 Negative to Chassis ground at control boa...

Page 15: ...14 RM3762 RM3962...

Page 16: ...s depressed interior light should be off When the re frigerator door is open the switch is closed interior light should be on Check that the switch assembly is properly aligned and that it is not brok...

Page 17: ...the chart MODEL JET SIZE RM3762 58 RM3962 58 Always check the parts list with the model and product number to assure the right jet size TESTING LP GAS SAFETY SHUTOFF The gas safety shutoff must be tes...

Page 18: ...aned periodically at least once a year Soak the burner in an alcohol based solvent and allow to air dry If the burner does not have a good ground it can cause erratic gas operation The electrode spark...

Page 19: ...ile home or recreational vehicle Openings for air supply or for venting of combustion products shall have a minimum dimension of not less than 1 4 inch Ventilation is a critical requirement for proper...

Page 20: ...19 Typical Two Side Wall Vent Application Always Refer To Vent Instructions 3308666 xxx...

Page 21: ...f this happens condensation could form on the frame and could promote rapid formation of frost If you suspect an improper seal apply a small bead of silicone all the way around the perimeter where the...

Page 22: ...conditions If so the cooling unit is good If the temperature of the water is above 43 degrees replace the cooling unit The outside temperature will affect the cooling capacity of the unit There is tha...

Page 23: ...22...

Page 24: ...communication between display and power modules The control system will revert to full automatic operation selecting the best energy source available with AC GAS priority The temperature setting will...

Page 25: ...arm is returned to the down position The absorption system will keep the compartment at the proper temperature for storage of ice Ice making is ac celerated if the thermostat is set to the coldest po...

Page 26: ...l type motor which is geared to the timing cam and ice ejector It is a one RPM motor To check the motor disconnect power to the appliance and test for continuity between the two leads If you DO NOT ha...

Page 27: ...toward the or side One full turn of the screw will make an 18 cc change in the amount of water DO NOT turn the screw more than one full turn at a time If the water level is too high it can also cause...

Page 28: ...27...

Page 29: ...28 ICE MAKER TYPICAL WIRING DIAGRAM...

Page 30: ...thermostat switches to its closed position after be ing sufficiently cooled by the ice in the mold The mold heater and motor are now energized The ejector blades begin to turn When the ejector blades...

Page 31: ...timing cam closes the holding switch providing a circuit to the motor that will assure completion of this revolution The mold heater remains energized The shut off arm will raise and lower again oper...

Page 32: ...rm thus operating its switch Near the completion of the second revolution the timing cam again closes the water valve switch This time a circuit is completed through the water valve solenoid its switc...

Page 33: ...32...

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