SC200 Installation& Operation Manual
3-16
9
Sequence of Operation
The following tables describe the general states and sequence of operation for the ice machine
models in ice-making mode with an additional table depicting the status when the ice bin is full
and the cleaning mode. The charts provide information about the inputs to the controller and the
corresponding AC outputs associated with each part of the ice making cycle.
Note:
•
Abnormal operation of the ice machine is covered in the Fault Condition section of the
manual.
Ice Making Sequence
Step 1
Fill
Step 2
Freeze
Step 3
Lower
Step 4
Harvest
Step 5
Raise
Control
Status
Status
Status
Status
Status
Bin Level Probe
Warm/Not Full Warm/Not Full Warm/Not Full Warm/Not Full Warm/Not Full
Ice-Clean Switch
Ice
Ice
Ice
Ice
Ice
Harvest Switch
“Run”
“Run”
“Run”
“Run”
“Run”
Evaporator
Temperature Probe N/A
Cold
Cold
Warming
Warm
Plate-Up/Down
Switches
Plate Up
Plate Up
Plate Lowering Plate Down
Plate Rising
Ice
None
Forming
Fully Formed
Fully Formed
None
Compressor
(Condenser Fan)
On
On
On
On
On
Water Plate
Closed
Closed
Opening
Open
Closing
Water Pump
On
On/Pause/On Off
Off
On
Defrost Valve
Closed/
De-energized
Closed/
De-energized
Open/
Energized
Open/
Energized
Closed/
De-energized
Water Valve
Open/
Energized
Closed/
De-energized
Closed/
De-energized
Closed/
De-energized
Open/
Energized
Actuator Motor
Off
Off
On/CCW
Rotation
Off
On/CW
Rotation
Dump Valve
Off
Off
Open/
Energized
Open/
Energized
Closed/
De-energized
