Dometic NDA1402 Service Manual page 10

oPeratIon
Before starting the refrigerator, check that all the manual
gas valves are in the "ON" position. DO NOT forget the
manual shutoff valve on the rear of the refrigerator. The
NDA1402 model refrigerator is equipped with a control
system which can be set to automatically select either 120
volt AC or LP gas operation (AUTO mode), or if desired
LP gas only (GAS mode). The NDE1402 model refrigera-
tor is an all electric 120 volt AC operation.
most lP gas appliances used in recreational
vehicles are vented to the outside of the ve-
hicle. When parked close to a gasoline pump
or traveling through tunnels, it is possible
that the gasoline fumes could enter this type
of appliance and ignite from the burner flame,
cauSIng a fIre or an eXPloSIon.
for your Safety, when refueling or trav-
eling through tunnels, shut off all lP gas ap-
pliances which are vented to the outside.
automatIc energy Selector control
SyStem
The NDA1402 model is equipped with an automatic ener-
gy selector control system. The user turns the refrigerator
on and selects the desired temperature and then, the con-
trol system selects the most suitable energy source avail-
able (either 120 volt AC or LP gas operation). The system
can be set by the user to be fully automatic (AUTO mode
ON) or to operate on LP gas only (AUTO mode OFF).
The NDE1402 model is an all electric operation.
Press AUTO/STORE button to select AUTO mode opera-
tion or to chose LP-gas mode of operation only.
modeS of oPeratIon (auto) & (gaS)
When the refrigerator is in the AUTO mode, it automati-
cally uses the most efficient energy source that is avail-
able for operation. Should a more efficient energy source
become available during operation, the refrigerator will
change from the current energy source to the more ef-
ficient energy source as follows:
•
AC operation (if 120 volt AC is available). AC op-
eration is only possible in AUTO mode.
•
GAS operation (if 120 volt AC is not available).
GAS mode (manual LP gas operation)
When the AUTO mode is turned off, the refrigerator
uses gas as an energy source - even if AC is avail-
able.
deScrIPtIon of oPeratIng modeS
auto mode
When operating in the AUTO mode, the AUTO mode
indicator dot is lit. The control system will automatically
select between AC and GAS operation with AC having
priority over GAS. (An indicator dot will be lit to inform of
the energy source selected). 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 available). The con-
trol system will activate the ignition system and will make
three attempts to light the burner for a period of approxi-
mately 45 seconds with two minutes rest (purge) interval.
If unsuccessful, "ch LP" will be displayed. To restart an
ignition attempt with "ch LP" in the display turn the unit off,
wait a few seconds and turn back on. The control system
will attempt a new ignition sequence. If 120 volts AC be-
comes available while "ch LP" is displayed, the refrigera-
tor will operate on AC but the "ch LP" will not turn off until
the main power ON/OFF button is pressed to the "OFF"
then "ON" position.
gaS mode
When operating in the GAS mode, the AUTO indication
dot will be off and the GAS indication dot is lit. This mode
provides LP gas operation only. The control system will
activate the ignition system and will make three attempts
to light the burner for a period of approximately 45 sec-
onds with two minutes rest (purge) interval after each trial.
If unsuccessful, "ch LP" will be displayed. To restart GAS
Operation, press the main power ON/OFF button to the
"OFF" and then "ON" position. The control system will at-
tempt 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 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.
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 "OFF" position. This shuts off all DC power to the
control system including the interior light.
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