Ice Maker Operation; Ice Maker Components; Mold Heater; Ice Ejector - Dometic RM7030 Service Manual

DIAGNOSTIC SERVICE MANUAL
SECTION 10

ICE MAKER OPERATION

The refrigerator must be allowed to precool properly
before starting the ice maker. The refrigerator has to be
connected to 120 volts AC before the ice maker can
operate. The water line manual shutoff valve must be
open. To start making ice, move the ice level bail arm to
DOWN position.
When the ice maker thermostat senses the preset
temperature for ejection of the ice cubes, the fingers will
start to rotate – dumping any ice cubes and filling the
mold with water.
When the storage container is full of ice, the ice level
bail arm can not return to the DOWN position. This will
stop further production of ice until the container is
emptied and the bail arm is returned to the down
position.
The absorption system will keep the compartment at the
proper temperature for storage of ice. Ice making is
accelerated if the thermostat is set to the coldest
position. It is a good idea to do this a few hours before
you anticipate a need for ice.
NOTE: IF THE ICE MAKER WAS CLEANED AND
DRAINED, NO ICE CUBES WILL BE DUMPED INTO
THE STORAGE CONTAINER DURING THE FIRST
CYCLE.
The first few cycles may have small cubes due to air
trapped in the water lines. The first container of ice
cubes should be dumped if the water system has been
winterized or not used for several weeks.
SECTION 11

ICE MAKER COMPONENTS

11.1 MOLD HEATER

The mold heater uses 165 watts to thaw the ice free
from the mold. It is wired in series with the thermostat
which also acts as a
safety device. With
power to the appli-
ance off, check for
resistance be-
ICE LEVEL tween the two
BAIL ARM
leads to the
heater element.
You should obtain
a reading of
approximately 80 ohms. If the heater is found to be
defective, the manufacturer recommends replacement
of the entire ice making unit for proper operation.

11.2 ICE EJECTOR

DOWN POSITION
The ice ejector blades sweep
the ice from the mold
cavities during the
ejection cycle.
The drive end of the
ejector is "D" shaped
for positive coupling.
The bearings at both
ends are lubricated
with silicone grease. If the ejector blades are frozen into
the ice, defrost the ice maker and manually cycle the ice
making unit, making sure the ejector stops at the right
location.

11.3 MOLD THERMOSTAT

This is a single-pole, single-throw, bimetal switch. It
starts an ejection cycle by closing at 18ºF ± 5º. The
reset temperature is 50ºF ± 5º. The thermostat is in
series with the mold heater and acts as a safety against
overheating in case of a mechanical failure. If the
thermostat is defective, replace it.
DOMETIC® RM7030/RM7732
MOLD HEATER
(Staked in Place)
"D" SHAPED
DRIVE END
THERMOSTAT
CLAMP
Refrigerators
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