U-Line SP 18, Service Manual

Page: 22 / 66

3-7
Section 3 - Service and Repair
Harvest-2 Cycle (
Figure 9
)
• Ice maker ejector blades reach approximately 2:00 position and
cam depresses the hold switch. Power goes through the hold
switch to the ice maker motor and mold heater.
• Ejector blades stall on ice and ice maker motor pulsates until
mold heater warms and ice releases.
Figure 9. Harvest-2 Cycle (Hold Switch in Switched Position)
Water Fill Cycle (
Figure 10
)
• Ice maker ejector blades reach approximately 10:00 position and
cam depresses the water fill switch.
• Power to the water valve. Ice maker mold fills.
Figure 10. Water Fill Cycle
Eject Cycle
• Ejector blades push ice into bucket and stop at 12:00 position.
• Temperature control terminals 2 and 3 have closed during
harvest cycle.
• Next freeze cycle begins with power to the compressor and
condenser fan.
SWITCH
LIMIT
orange
black
black
black
MOTOR
MAKER
ICE
MOLD HEATER
WATER
SWITCH
FILL C
NC
MOTOR
FAN
LOAD
OVER
black
RELAY
START
COMP.
SWITCH
OFF
ON
black
black
blue
black
CONTROL
TEMP.
NC
black
orange
3
yellow
2
orange
SWITCH
BIN
red
NO
1
C
NO
brown
black
white
C
SWITCH
HOLD
VALVE
WATER
ground
UL183-6
SWITCH
LIMIT
orange
black
black
black
MOTOR
MAKER
ICE
MOLD HEATER
WATER
SWITCH
FILL C NC
MOTOR
FAN
LOAD
OVER
black
RELAY
START
COMP.
SWITCH
OFF
ON
black
black
blue
black
CONTROL
TEMP.
NC
black
orange
3
yellow
2
orange
SWITCH
BIN
red
NO
1
C
NO
brown
black
white
C
SWITCH
HOLD
VALVE
WATER
ground
UL183-7