Maintenance & Service - Dometic DMR702 Installation & Operating Instructions Manual

MAINTENANCE & SERVICE
CAUTION
If your refrigerator stops cooling, immediately turn
the refrigerator off and see a Dometic dealer.
In order to keep the refrigerator work-
ing properly it is important to periodically
check the venting system and that service is
performed on a regular schedule. This ser-
vice must be performed by qualified service
personnel only!
ELECTRIC EQUIPMENT
HEATER
The heat necessary for the operation of an absorption cooling
unit is supplied by an electric heater mounted in a pocket of the
boiler system. The refrigerator is equipped with one electrical
heater for 120V AC.
REPLACING THE HEATER
To replace the heater, follow these steps:
1. Turn off the refrigerator.
2. Unplug the power cord and disconnect the 12V DC
power.
3. Open the power module cover.
4. Disconnect the heater leads.
5. With a pair of pliers, unfold the lug holding the lid
of the boiler casing and then, open the lid. Remove
some insulation wool for the heater to be accessible.
6. Turn and lift the heater out of its pocket.
7. Fit the new heater into the pocket.
8. Connect the leads and close the power module cover.
9. Put the insulation wool back in place.
10. Close boiler lid.
FUSES
The refrigerator is equipped with two 5 A fuses - one for
12V DC and one for the AC heater.
REPLACING THE FUSES
1. Tun off the refrigerator.
2. Unplug the power cord
3. Open the power module cover.
4. Snap the fuse out of the fuse holder.
5. Fit the new fuse in to the fuse holder.
6. Close the power module cover.
CHECKING THE CONNECTIONS
LP gas is a flammable gas which has the potential to create a
hazard. Do not smoke or create sparks when working on or
near the LP gas system.
6
!
EXPLOSION HAZARD. Never use an open flame
to check for gas leaks. Failure to heed this warn-
ing could cause an explosion resulting in death or
severe personal injury.
1. Check all connections in the LP gas system for gas
leaks. The LP gas supply must be turned on.
2. Apply a non-corrosive bubble solution to all LP gas
connections. The appearance of bubbles indicates a
leak and should be repaired immediately!
CHECKING THE CONTROL SYSTEM
Check the control system by connecting/disconnecting the
120V AC power, starting/stopping the engine, etc.
CHECKING THE LP GAS PRESSURE
The LP gas pressure should be checked and the main regulator
readjusted if the pressure is incorrect. The correct operating
pressure is 11 inches of water column. Measure the LP gas
pressure at the test port, just ahead of the burner jet.
GAS EQUIPMENT ASSEMBLY
SOLENOID VALVE
INLET FITTING
APPROVED
PRESSURE TEST PORT
- 16 -
WARNING
MANUAL SHUTOFF VALVE
(shown in open position)
BURNER JET
BURNER TUBE
SPARK ELECTRODE
BURNER MOUNTING SCREW