Battery Protection System - Dometic RM2607 Service Tips Manual

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 protection 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.
As soon as the input voltage rises above the required 12.8 volts, the DC mode lamp (F) will illuminate;
however, 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 recharge 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 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 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".