Dometic RM2620 User Manual download pdf (Page 9)

LIMP MODE OF OPERATION

This control system contains a feature where it will con-

tinue 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 func-

tional, the control system will revert to full automatic

operation selecting the best energy source available with

AC, GAS priority. The temperature of the refrigerator will

be maintained at the MID position within normal tem-

perature tolerances. The power module will continually

attempt to reestablish operation of the display module.

The second limp 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 in-

definitely or until a new sensor is installed and the sys-

tem is reset.

DESCRIPTION OF OPERATING

MODES

AUTO MODE

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.

Either the AC indicator lamp (B) 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.

GAS MODE

When operating in the GAS mode, the AUTO mode

indicator lamp (A) 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 make three attempt to light the

burner for a period of approximately 45 seconds with

two minutes interval. If unsuccessful, the CHECK indi-

cator lamp (D) will illuminate and the GAS mode indica-

tor 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 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 problem is still not corrected, con-

tact a service center for assistance.

If the control is switched to AC 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.

Refrigerator control panel

OFF

GAS

AUTO

CHECK

COLD

COLDEST

BC E

12 3

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Dometic RM2620 User Manual Page 9

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