42
Dometic
®
MANUAL
Refrigerators
As soon as the input voltage rises above the required
12.8 volts, the DC mode lamp (F) will illuminate; how-
ever, the control system will remain in the 25 minute
delay mode and operate on gas. This delay is to allow
sufficient time for the vehicle charging system to re-
charge the battery. If 120 volt AC becomes available
during the 25 minute delay, the control will automatically
switch energy source.
SPECIAL FEATURES OF OPERATION
This control system contains a feature where is 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 the display module becomes nonfunctional, the
control system will revert to full automatic operation
selecting the best energy source available with AC, DC
and GAS priority. The temperature of the refrigerator
will be maintained at the MID position within normal
temperature tolerances.
The power module will continually attempt to reestablish
operation of the display module.
The second Special Feature 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 and
could freeze. The refrigerator will continue to operate in
this mode indefinitely or until a new sensor is installed
and the system is reset.
NOTE: The operational range of these refrigerators is
46°F to 35°F ± 3°.
3-WAY DISPLAY PANEL
ON
OFF
AUTO
AC GAS
1
CHECK COLD 1 2 3 4 5 COLDEST
4
23
FECB
DA
DC
2-WAY DISPLAY PANEL
ON
OFF
AUTO
AC GAS
1
2
CHECK COLD 1 2 3 4 5 COLDEST
3
D
C
B
E
F
3D. ROYALE REFRIGERATOR OPERATION
MODELS INCLUDE: RM3662, RM3663,
RM3862 and RM3863
AUTO MODE (2-WAY MODEL)
Press the AUTO mode selector button (2) to the DOWN
position. If 120 volts AC is available, the AC mode
indicator lamp (B) will illuminate indicating AC opera-
tion. If 120 volts AC is not available, the GAS mode
indicator lamp (C) will illuminate and the control system
will automatically switch to GAS operation.
If the CHECK indicator lamp (E) illuminates and the
GAS mode indicator lamp (C) is OFF, the controls have
failed to ignite the burner in the GAS mode. GAS
operation may be reset by pressing the main power ON/
OFF button (1) to the OFF then ON position. (See GAS
MODE.)
Press the TEMPERATURE SELECTOR button (3) until
the lamp at the desired position is illuminated.
GAS MODE (2-WAY MODEL)
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 start-up, it may take longer
than 45 seconds to allow air to be purged from the gas
line. If the gas does not ignite within 45 seconds, the
CHECK indicator lamp (E) will illuminate and the GAS
mode indicator lamp (C) will go off. To reset when the
CHECK indicator lamp (E) is illuminated, press the main
power ON/OFF button (1) to the OFF and then ON
position.
NOTE: DO NOT continue to reset GAS operation if
the CHECK indicator lamp continues to be illumi-
nated after several tries.
Press the TEMPERATURE SELECTOR button (3) until
the lamp (F) at the desired position is illuminated.
AUTO MODE (3-WAY MODEL)
Press the DC mode selector button (2) to the UP (OFF)
position.
Move the AUTO mode selector button (3) to the DOWN
position. If 120 volts AC is available, the AC
mode indicator lamp (B) will illuminate indicating AC
operation. If 120 volts AC is not available, the GAS
mode indicator lamp (C) will illuminate and the control
system will automatically switch to GAS operation.
If the CHECK indicator lamp (E) illuminates and the
GAS mode indicator lamp (C) is off, the controls have
failed to ignite the burner in the GAS mode. GAS
operation may be reset by pressing the main power ON/
OFF button (1) to the OFF then ON position. (See GAS
MODE).
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