Viking VCFB304 Service Notebook page 42

SHUT-OFF ARM AND SWITCH
The shut-off arm operates the shut-off switch.
During the harvest cycle, the arm is raised and
lowered during each of two revolutions by a
cam. If ice in storage in keeps arm up, shut-
off switch will remain open and stop icemaker
at the end of that revolution, shut-off arm can
also be manually raised to its locked position
to shut off icemaker.
TEST CYCLING
Manually rotate the ejector up and forward
(clockwise viewed from the motor end) by 1/8
to ¼ turn or remove the cover and rotate the
small motor drive gear counter-clockwise
with a screwdriver (See Figure 3).
remove the cover, insert screwdriver in
notch at bottom or side and pry cover from
housing (See Figure 2). When freezer door
is closed, all components of icemaker
should function through complete cycle. To
observe with freezer door open, the freezer
door switch must be held closed.
observe ice being harvested, raise the shut-
off arm after the mold has filled with water
and the ejector has returned to the park
position. Allow one hour for the ice to
freeze solid. Lower the shut-off arm and
hold the freezer door switch closed. If the
thermostat is closed, the ejector will start to
move. The icemaker should go through two revolutions. Each revolution will take about
three minutes. An internal cam will raise and lower the shut-off arm during each
revolution. The mold should refill at the end of the second revolution.
The fill adjustment screw changes fill volume by changing fill time. (See Figure 3)
• Turning screw clockwise decreases the fill time.
• Turning screw counter-clockwise increases the fill time.
• One full turn equals 20 cc (0.70 oz.) or 1.1 to 1.2 seconds.
• Correct fill equals 120 cc (4.2 oz.) or 6.6 to 7.2 seconds.
• Each harvest yields approximately one-quarter pound (1/4 lb.) of ice.
• When water valve is replaced, fill volume must be checked.
To measure fill volume, remove the fill tube from the fill cup and be ready to catch the
water in a measuring cup, then start a test cycle as described above.
To
To
WATER FILL VOLUME
41