Dometic RM7732 - Manual (Page 10)

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DIAGNOSTIC SERVICE MANUAL
DOMETIC® RM7030/RM7732
Refrigerators
3. Press the TEMPERATURE SELECTOR button (3)
until the lamp at the desired position is illuminated.
4. When operating in the AES mode, the AES mode
indicator lamp "B" will illuminate. The control system
will automatically select between AC and GAS
operation with AC having priority over GAS. Either
the AC indicator lamp "A" or the GAS indicator lamp
"C" will illuminate depending on the energy source
selected by the control system. If the control system
is operating 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 regardless of the
status of GAS operation.
GAS MODE
1. Move the AES mode selector button (2) to the UP
position. The GAS mode indicator lamp "C will
illuminate. After 45 seconds the burner should be
ignited and operating normally.
2. 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 "D" will illuminate and the
GAS mode indicator lamp "C" will go off. To reset
when the CHECK indicator lamp "D" is illuminated,
press the main power ON/OFF button (1) to the OFF
then ON position.
If the control is switched to AC operation while
the CHECK indicator lamp is on, it will function
properly, but the CHECK indicator lamp will not go
off until the main power ON/OFF button is pressed to
the OFF then ON position.
NOTE: Do not continue to reset GAS operation if
the CHECK indicator lamp continues to be illumi-
nated after several tries. 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.
3. Press the TEMPERATURE SELECTOR button (3)
until the lamp at the desired position is illuminated.
THERMOSTAT
The thermostat on the refrigerator controls both the gas
and electric operation, thereby eliminating the necessity
of resetting each time a different energy source is
employed.
After the initial start-up, the thermostat should be moved
from "COLDEST" to the desired temperature setting,
usually about mid-setting.
STANDBY MODE OF OPERATION
This control system contains a feature where it 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 for some reason the display module becomes non-
functional, the control system will revert to fully auto-
matic operation – selecting the best energy source
available with AC 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 standby mode 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.
1.3 RM7732 REFRIGERATOR OPERATION
A
C D E
2-WAY DISPLAY PANEL
B
AUTO MODE
Press the AUTO mode selector button (2) to the DOWN
position. If 120 volts AC is available, the AC mode
indicator lamp (A) 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 (D) 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.