Ac Voltage; Ac Voltage Requirements - Dometic RM2351 Diagnostic Service Manual

note: Do not continue to reset GAS operation if the
CHECK indicator lamp continues to be illuminated after
several tries.
gaS mode
Move the AUTO/GAS button 2 (Auto Thermostat) or button
3 (Adjustable Thermostat) to the UP position. The AUTO
mode indicator lamp (A) will go off. Within 45 seconds the
burner should be ignited and operating normally.
dc mode 3 Way units only
Press the DC mode indicator button (2) to the DOWN
position. (Lamp [A] will light). Press the TEMPERATURE
SELECTOR button (4) until the lamp (F) at the desired
position is illuminated. The refrigerator will continue to op-
erate in the DC mode until switch (2) is moved to the UP
position or control voltage falls below 9.6 VDC. The DC
mode overrides all the other operating modes. Discharg-
ing of the battery will occur if the vehicle engine is not
running.
note: the dc mode is a holding mode not a full cool-
ing mode. dc should be used once the unit is cooled
down and constant supply of dc available (driving
down the road).
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 to
the UP (OFF) position. This shuts off all DC power to the
control system.
description of operating modes
auto mode
When operating in the AUTO mode, the AUTO mode in-
dicator lamp (A) will illuminate. The control system will
automatically select between AC and GAS operation with
AC having priority over GAS. If the control system is op-
erating 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 operation. gas operation (120 volts AC is not avail-
able). The control system will activate the ignition sys-
tem and will make three attempts to light the burner for
a period of approximately 45 seconds with two minutes
rest (purge) interval. If unsuccessful, the CHECK indica-
tor lamp (B) will illuminate. To restart an ignition attempt
with the CHECK lamp illuminated or to clear (turn off) the
CHECK lamp, press the main power ON/OFF button to
the OFF position and wait a few seconds, then return to
the ON position. The control system will attempt a new ig-
nition sequence. If 120 volts AC becomes available while
the CHECK indicator lamp is on, the CHECK lamp will not
turn off until the main power ON/OFF button is pressed
to the OFF then ON position but the unit will operate on
AC.
gas mode
When operating in the GAS mode, the AUTO mode indi-
cator lamp (A) will be off. This mode provides LP gas op-
eration only. The control system will activate the ignition
system and will make three attempts to light the burner for
a period of approximately 45 seconds with two minutes
a period of approximately 45 seconds with two min-
utes (purge) interval after each trial. If unsuccessful, the
CHECK indicator lamp (B) will illuminate. 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 turned on.
dc mode 3 Way units only
Press the DC mode indicator button (2) to the DOWN
position. (Lamp [A] will light). Press the TEMPERATURE
SELECTOR button (4) until the lamp (F) at the desired
position is illuminated. The refrigerator will continue to op-
erate in the DC mode until switch (2) is moved to the UP
position or control voltage falls below 9.6 VDC.
The DC mode overrides all the other operating modes.
Discharging of the battery will occur if the vehicle engine
is not running.
note: the dc mode is a holding mode not a full cool-
ing mode. dc should be used once the unit is cooled
down and constant supply of dc available (driving
down the road).
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 to
the UP (OFF) position. This shuts off all DC power to the
control system.
limp mode
This control system contains a feature where it will con-
tinue to operate the cooling system in event of a failure of
a major operating component. If the control cannot read
the temperature sensor and control to the preset temper-
ature, then the control will run the cooling unit continu-
ously at the energy source available. The refrigerator will
continue to operate in this mode indefinitely or until a new
sensor is installed and the system is reset.
SectIon 2 ac Voltage

ac Voltage reQuIrementS

this is an energized circuit. Shock can occur
if not tested properly. testing is to be done
by a qualified service technician.
The proper operating range is 100 to 132 volts. If voltage
drops below 100 volts, cooling efficiency will decrease
with voltage decrease.
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