Dometic
®
MANUAL
Refrigerators
41
If the display module becomes nonfunctional, the
control system will revert to full automatic operation
selecting the best energy source available with AC, DC
(3-way only) 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. The
refrigerator will continue to operate in this mode indefi-
nitely or until a new sensor is installed and the system is
reset.
NOTE: The operational range of these refrigerators is
46° to 35° ± 3°F.
2D. AES REFRIGERATOR OPERATION
Models Include: RM3607 and RM3807
AES MODE
In this mode of operation the control system will
automatically select between the AC and GAS energy
sources with AC having first priority.
GAS MODE
When operating in the GAS mode, the mode indicator
lamp (E) will illuminate.
The GAS 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 (G) 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 seconds 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 the AES or AC/GAS mode
of operation while the CHECK indicator lamp is on, it
will function properly on AC or DC, but if the CHECK
indicator lamp is on, it will not go off until the main
power ON/OFF button is pressed to the OFF then ON
position.
BATTERY PROTECTION SYSTEM
The control system is equipped with a battery protec-
tion system. If AC power is not available, the control
will switch to the DC energy source. If the input voltage
at the terminal block connections is below 12.8 volts,
the control system will bypass the DC energy source
and attempt GAS operation. If the GAS energy source
is available, CHECK lamp is on, the control system will
return to the DC energy source. The control will
operate in the DC mode for a maximum of 10 minutes.
If the input voltage has not returned above 12.8 volts
within this time, the control will terminate DC operation
and turn off the DC lamp (F) and start gas operation if
GAS energy source is available and check light is not
on.
The input battery voltage must rise above 12.8 volts for
25 minutes before DC operation can resume.
3-WAY AES DISPLAY PANEL
The AES mode of operation takes priority over all other
operating modes. If more than one mode selector
button (2), (3) or (4) is in the down position, the priority
is from left to right.
When operating in the AES mode, the AES mode
indicator lamp (A) will illuminate. In this mode the
control system will automatically select the energy
source with AC having top priority, DC second priority
and GAS third priority. If the control system has se-
lected a particular energy source such as AC, and then
it becomes unavailable, it will automatically seek out the
next available energy source.
AC/GAS MODE
When operating in the AC/GAS mode the AC/GAS
mode indicator lamp (B) will illuminate.
14253
ON GAS
COLDEST
AC
GAS
OFF
COLD 1 2 3 4 5
BCA
AC GAS
DC CHECK
DE
FG
H
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