DOMETIC® RM7030/RM7732 Refrigerators
DIAGNOSTIC SERVICE MANUAL
GAS MODE
Move the AUTO mode selector button (2) to the UP position. The GAS mode indicator lamp (C) will illumi- nate. After 45 seconds the burner should be ignited and operating normally.
On the initial refrigerator
Press the TEMPERATURE SELECTOR button (3) until the lamp (E) at the desired position is illuminated.
THERMOSTAT
The thermostat on the refrigerator controls both the gas and electric operation, thereby eliminating the necessity of resetting each time a different energy source is employed.
After the initial
GAS MODE
When operating in the GAS mode, the AUTO mode indicator lamp (B) will be off and the GAS mode indica- tor lamp (C) will be illuminated. This mode provides LP gas operation only. The control system will activate the ignition system and will attempt to light the burner for a period of approximately 45 seconds. If unsuccessful, the CHECK indicator lamp (D) will illuminate and the GAS mode indicator lamp (C) will turn off.
To restart GAS operation, press the main power ON/ OFF button (1) to the OFF and then ON position. The control system will attempt a new 45 second ignition sequence.
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 or 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.
If the control is switched to AC or DC operation while the CHECK indicator lamp is on, it will function properly, but the CHECK indicator lamp will not go off until the main power ON/OFF button is pressed to the OFF then ON position.
TO SHUT OFF THE REFRIGERATOR
The refrigerator may be shut off while in any mode of operation by pressing the main power ON/OFF button
(1)to the UP (OFF) position. This shuts off all DC power to the refrigerator, including the interior light.
DESCRIPTION OF OPERATING MODES
AUTO MODE
When operating in the AUTO mode, the AUTO mode indicator lamp (B) will illuminate. The control system will automatically select between AC and GAS operation with AC having priority over GAS. Either the AC indica- tor lamp (A) or the GAS indicator lamp (C) will illuminate depending on the energy source selected by the control system. If the control system is operating with 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 regardless of the status of GAS operation.
STANDBY MODE OF OPERATION
This control system contains a feature where it will continue to operate the cooling system in the event of a failure of a major operating component. Two different modes of operation can occur in this category.
If for some reason the display module becomes non- functional, the control system will revert to full automatic operation selecting the best energy source available with AC as first priority, and GAS as the second priority. The temperature of the refrigerator will be maintained at the MID position within normal temperature tolerances. The power module will continually attempt toreestablish operation of the display module.
The second standby mode of operation will execute when a failure of the temperature sensing device or associated electronic circuitry occurs. If this should occur, the control system will operate on the energy source selected via the control panel. The cooling unit will run continuously on the selected energy source. The refrigerator will continue to operate in this mode indefi- nitely or until a new sensor is installed and the system is reset.
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