Section D. Maintenance & Service - Dometic RM4873 Manual

ber of water droplets will increase if the vehicle isn't air
conditioned during these months.
This refrigerator comes standard with a 12 volt (DC) climate
control that will evaporate the water droplets when they form.
To have the climate control on, you position the switch ("J",
Figure 10) located beneath the top decorative strip that
houses the control panel to ON. The climate control can be
left on continuously or only used when temperatures require
it.
SECTION D. MAINTENANCE & SERVICE
The user should be aware of service that must be done on a regular schedule to keep the refrigerator operating properly.
The service should only be performed by a qualified technician who is familiar with LP gas systems and refrigerators.
1. REFRIGERATOR REMOVAL
Before working on the refrigerator, make sure the AC voltage
and DC voltage leads are disconnected. Shut off the gas
supply. Disconnect the gas supply line. Cap the gas supply
line, loosen the screws anchoring the refrigerator to the
enclosure and slide the refrigerator out of the compartment.
Replacement is the reverse of removal. Check all connec-
tions for gas leaks. Refer to Section A, Item 1 to 12 of
Installation Instructions .
2. PERIODIC MAINTENANCE
To keep your Dometic refrigerator operating efficiently and
safely, periodic inspection and cleaning of several compo-
nents once or twice a year is recommended.
A. It is important to keep the area at the back of the
refrigerator clean. Check the lower vent, upper vent and
area between these openings for any obstructions such
as bird/insect nests, spider webs, etc. Clean the coils on
the back of the refrigerator. Use a soft bristled brush to
dust off the coils.
It is important to keep the refrigerator vent area free from
combustible material, gasoline and other flammable
vapors or liquids.
NOTE: The following maintenance is required once or twice
a year, but should only be done by a qualified serviceman
who is familiar with LP gas systems and refrigerators.
B. Check all connections in the LP gas system (at the back
of the refrigerator) for gas leaks. The LP gas supply must
be turned on. Apply a noncorrosive bubble solution to all
LP gas connections. The appearance of bubbles indi-
cates a leak and should be repaired immediately by a
QUALIFIED SERVICEMAN WHO IS FAMILIAR WITH
LP GAS SYSTEMS AND REFRIGERATORS.
Tips for the Service Technician
13
THE CLIMATE CONTROL WILL DRAW 12 VOLT DC
POWER CONTINUOUSLY WHEN IN THE "ON" POSI-
TION. IT SHOULD BE TURNED "OFF" WHEN A CHARG-
ING SOURCE IS NOT AVAILABLE.
DO NOT USE A FLAME TO CHECK FOR GAS LEAKS.
C. Check the Automatic Select control system by connect-
ing/disconnecting 120 volt AC power, start/stop the
engine, etc. Compare the operation with the operation
described in Section C. Operation Instructions .
D. The LP gas pressure should be checked and the main
regulator readjusted if pressure is incorrect. The correct
operating pressure is 11 inches of water column. The
correct place to take the LP gas pressure is at the test
port just ahead of the burner jet. (See FIG. 12).
E. Inspect the flue baffle. It should be reasonably clean and
free of soot. Heavy soot formation indicates improper
functioning of the burner. The flue and burner both require
cleaning in the following manner:
1) Unplug the refrigerator power cord from the 120 volt
AC outlet (see FIG. 6).
2) Disconnect or shut off the 12 volt power to the
refrigerator.
3) Turn manual shutoff valve to OFF. (See FIG. 6 & 12).
4) Remove cover from the burner housing. (See FIG . 6).
5) Disconnect the wire from the high voltage electrode.
6) Remove the burner mounting screws and remove the
burner assembly.
7) Remove the flue cap from top of flue tube and lift out
the wire and spiral baffle. Clean the flue from the top