Dometic RM2612, RM2812, RM2652, RM2852 Service Manual

SERVICE TIPS

81 Dometic

REFRIGERATORS

Models

RM2612 RM2812 RM2652 RM2852

Dometic

Corporation

THE MOST COMMON SYSTEM PROBLEMS ASSOCIATED WITH THE

RM2612, RM2812, RM2652, RM2852 REFRIGERATORS

. .

SYMPTOM

REFRIGERATOR SECTION

CAUSE

No operation - no panel lights

No operation - has panel lights

No AC operation - operates on gas mode

No Gas operation - operates on AC mode

Operation DC Volts

Fuse

Wiring

Upper Circuit Board Lower Circuit Board

Operation DC Volts Thermistor Fuses Wiring

Lower Circuit Board

Operation AC Volts

Fuse Heating Element Wiring Lower Circuit Board

Operation LP Gas Manual Gas Valve

Igniter High Voltage Cable Electrode Solenoid Wiring Lower Circuit Board

Insufficient cooling on all modes.

Insufficient cooling on AC - cools properly on gas mode.

Ventilation Leveling Ambient Temperature Air Leaks Thermistor Cooling Unit

AC Volts

Heating Element Lower Circuit Board

SYMPTOM

CAUSE

Insufficient cooling on Gas AC mode.

Freezes.

9. Check light on.

10.

Interior light on when door is closed.

11.

Rapid formation of frost.

- cools

properly on

LP Gas Orifice Flue Baffle Flue Tube Burner Lower Circuit Board

Operation Thermistor

Lower Circuit Board DC Volts

Wiring

LP Gas Manual Gas Valve Solenoid Orifice Burner Thermocouple

Lower circuit Board

Wiring

Door Switch Door Position

Food Storage Interior Liner to Frame High Humidity

Air Leaks

12. Water on frame.

Interior Liner to Frame High Humidity Air Leaks Climate Control Heater

DISPLAY PANEL

(RM2652, RM2852)

LEGEND 2-WAY MODEL

Main Power Button ON/OFF

AUTO/MANUAL Mode Selector Button

AUTO Mode indicator lamp

CHECK indicator lamp (Gas Mode Only)

C. Climate control switch

OFF

AUTO\0

MANUAL

DISPLAY PANEL

(RM2612, RM2812)

(IIfzl

o CHECK

REFRIGERATOR CONTROL

. .

Dometic

LEGEND

Main Power Button ON/OFF

AUTO/MANUAL Mode Selector Button

AUTO Mode indicator Lamp CHECK Indicator Lamp

(GAS Mode Only) Climate Control Switch

START-UP INSTRUCTIONS

Before starting the refrigerator, check that all the manual gas valves are in the ON position. DO NOT forget

the manual shutoff valve on the rear of the refrigerator.

This refrigerator is equipped with a control system, which can automatically select the most suitable energy source which is available, either 120 Volt AC or LP gas operation. The refrigerator can be operated in either the AUTO mode (thermostat factory preset below the safe food storage temperature)

or MANUAL mode (continuous operation NOTE: Under certain cool weather conditions, the food in the lower portion of the fresh food compartment

may freeze if operated for an extended period of time on the MANUAL mode. A.

A 12 volt DC supply must be available for the electronic control to function. The refrigerator will work down to 9.6 volt DC. B.

Press the main power ON/OFF button (1) to the DOWN position.

In AUTO mode operation, the temperature is controlled by a single temperature setting, on the energy source selected by the control system. (See Auto Mode)

In MANUAL mode operation, the refrigerator will run continuously on the energy source selected by the

control system. (See Manual Mode)

NOTE: The food in the lower compartment may be frozen if the refrigerator is left on MANUAL mode.

no thermostat control).

. .

TO SHUT OFF THE REFRIGERATOR

The refrigerator may be shut off while in any mode of operation by button to the UP (OFF) position. This shuts off all DC power to the refrigerator, including the interior light.

pressing the

main power ON/OFF

OPERATING MODES

AUTO MODE

Press the AUTO/MANUAL mode selector button (2) to the DOWN position. The AUTO mode indicator lamp (A) will illuminate.

When operating in the AUTO mode, the AUTO mode indicator lamp (A) will illuminate. The control system

will automatically select between AC and GAS operation with AC having priority over GAS. If the control system is operating on AC energy and it then becomes unavailable, the system will automatically switch to GAS. As soon as AC becomes available again the control will switch back to AC operation. If 120 volts AC is not available, the control system will automatically switch to GAS operation. Within 45 seconds the burner should be ignited and operating normally. If unsuccessful, the CHECK indicator lamp (B) will illuminate.

To restart an ignition attempt with the CHECK lamp illuminated or to clear (turn off) the CHECK lamp, press the main power ON/OFF button to the OFF and then to the ON position. The control system will attempt a new 45 second ignition sequence.

On the initial refrigerator start-up on gas (120 volts AC is not available), it may take longer than 45 seconds to allow air to be purged from the gas line. If the refrigerator has not been used for a long time or the LP tanks

have just been refilled, air may be trapped in the supply lines. To purge the air from the lines may require resetting the main power ON/OFF button (1) three of four times. If repeated attempts fail to start the LP gas operation, check to make sure that the LP gas supply tanks are not empty and all manual shutoff valves in the lines are open.

NOTE: DO NOT continue to reset GAS operation if the CHECK indicator lamp continues to be illuminated after 3 or 4 tries.

If 120 volts AC becomes available while the CHECK indicator lamp is on, the control system will switch to 120 volt AC operation, The CHECK lamp will not turn off until the main power ON/OFF button is pressed to

the OFF then ON position.

In AUTO mode operation, the temperature is controlled by a single temperature setting.

MANUAL MODE

When operating in the MANUAL mode, the AUTO mode indicator lamp (A) will be off, and the refrigerator will run continuously on the energy source selected by the control system.

NOTE: The food in the lower compartment may be frozen if the refrigerator is left on “MANUAL” mode.

STANDBY MODE

This control system contains a feature that will continue to operate the cooling system in the event of a failure

of a major operating component. If the control cannot read the temperature sensor and operate at the preset

temperature, then the control will run the cooling unit like the MANUAL mode.

The refrigerator will continue to operate in this mode indefinitely or until a new sensor is installed and the system is reset.

. .

AC VOLTAGE REQUIREMENTS

The proper operating range is 100 to 132 volts. If voltage drops below 100 volts, cooling efficiency will

decrease with voltage decrease. The refrigerator will not switch to another mode of operation until all

power is lost.

The refrigerator is equipped with a three-prong (grounded) plug for protection against shock hazards, and should be plugged directly into a properly grounded three-prong receptacle.

Volt AC

120

Receptacle

Volt AC

+ 14 hidden pages