Kold-Draft GB564AC - Sequence of Operation; Ice Making Sequence

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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.
• The sequence of operation for GB106x models is identical to the GB56x and all models
utilize the same controller.
Note: GB106x models employ two each of the following electrical components and controls:
• Condenser Fan Motor (air cooled models only)
• Actuator Motor
• Water Pump
• Defrost Valve
• Water Plate Switch
• Arms-Up Switch
• Arms-Down Switch
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
Contactor
Closed
Closed
Closed
Closed
Closed
Water Plate Switch
Up
Up
Down
Down
Down
Evaporator
Temperature Probe
N/A
Cold
Cold
Warming
Warm
Water Level Control
Low
Level/Rising
High/Level
Falling
Low
Low
Low
Arms-Up/Down
Switches
Arms Up
Arms Up
Arms Lowering
Arms Down
Arms 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
Off
Off
Off
Defrost Valve
Closed/
De-energized
Closed/
De-energized
Open/
Energized
Open/
Energized
Closed/
De-energized
Water Valve
Open/
Energized
Closed/
De-energized
Open/
Energized
Closed/
De-energized
Open/
Energized
Actuator Motor
Off
Off
On/CCW
Rotation
Off
On/CW
Rotation
Control Stream
Low
Low to High
Off
Off
Off