Dometic RM2451 Operating Instructions Manual page 5

REFRIGERATOR OVERVIEW
MODES OF OPERATION
AUTO MODE - AES/AUTO MODE
When operating in AUTO - AES/AUTO mode, the AUTO
- AES/AUTO mode indicator lamp is illuminated. The con-
trol system will automatically select between AC and GAS
operation. AC has priority over GAS. Should AC become
unavailable, the system automatically switches to GAS.
As soon as AC becomes available again, the control will
switch back to AC regardless of the status of the GAS
operation.
If the CHECK indicator lamp is illuminated the controls
have failed to ignite the burner in the GAS mode. To re-
start an ignition attempt with the CHECK lamp illuminated
(or to turn off the CHECK lamp), press the ON/OFF button
OFF and back ON again. The control system activates
the ignition system and makes three attempts to light the
burner for a period of approximately 45 seconds at two
minutes interval. Should 120 VAC become available while
the CHECK indicator lamp is on, the CHECK lamp will not
turn off until the ON/OFF button is pressed OFF and then
ON again.
GAS MODE
RM2351, RM2451, RM2551, DM2652 & DM2852:
When operating in GAS mode, the AUTO mode indicator
lamp will be off.
RM2354, RM2454, RM2554, DM2662, DM2663, DM2862 &
NDM1062: When operating in GAS mode, the GAS Mode
indictor lamp is illuminated.
This mode provides LP gas only. The control system acti-
vates the ignition system and attempts to light the burner
for a period of approximately 45 seconds at two minutes
interval. If unsuccessful, the CHECK indicator lamp will
illuminate.
To restart GAS operation, press the ON/OFF button to
OFF and then back ON. The control system attempts a
new ignition sequence.
DC MODE
RM2354, RM2454, RM2554 & DM2663
When operating in DC mode (3-way models only), the DC
mode indicator lamp is illuminated and all other lamps
are off. To select another operating mode, turn off the DC
mode by pressing the DC selector button. The DC lamp
is turned off.
When there is no charging of the house battery, switch to
AUTO mode or GAS mode since running the refrigerator on
12 VDC will quickly drain the battery.
LIMP MODE OF OPERATION
In the event of a failure of a major operating component,
the control system will continue to operate the cooling
system.
RM2351, RM2451, RM2551, DM2652 & DM2852
If the control can not read the temperature sensor and
control the preset temperature, the control will run the
cooling unit continuously at the energy source available.
The refrigerator will continue to operate in this mode in-
definitely - or - until a new sensor is installed and the sys-
tem reset.
RM2354, RM2454, RM2554, DM2662, DM2663, DM2862 &
NDM1062
Two modes of operation can occur:
1) The first limp mode of operation will execute if the
display module becomes non functional. The control
system reverts to full automatic operation selecting
the best energy source available with AC, DC (3-
way only) and GAS priority. The temperature setting
is maintained at the mid position. The power module
will continually attempt to reestablish operation of the
display module.
2) The second limp mode of operation will execute when
a failure of the temperature sensing device or associ-
ated electronic circuitry occurs. If this should happen,
the control system operates on the energy source se-
lected via the control panel. The cooling unit runs con-
tinuously on the selected energy source. The refrig-
erator continues to operate in this mode indefinitely or
until a new sensor is installed and the system is reset.
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