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6-6
ELECTRICAL CONTROLS
AX –
CB2 –
CC –
CR –
CU –
CS –
DS –
ET –
FC –
FPS –
FU1 & FU2 –
FU10-FU60 –
P –
PB1 –
PB2 –
PDB –
PF –
–
PM
SS –
T –
TB –
TB1 –
TB2 –
3/31/14
Description of Component Function
Auxiliary trip indicator for manual motor starters. Switches when cutter or pump motor starter
trips.
Overload and short circuit protection for control circuit and crankcase heater. (400/460V machines
only)
Provides power to the compressor motor. Continuously energized during freezing and thawing.
Auxiliary contacts control main power for control circuit components, crankcase heater, control
relay and harvest timer.
Controls sequencing of Freezing and Thawing circuits. Energized during thawing period.
Cutter Motor Starter (Manual motor starter and contactor). Starts and stops cutter motor. Provides
short circuit and over current protection. Stops cutter motor and ice machine in the event of a
mechanical or electrical malfunction that results in excessive motor amperes.
CoreSense replaces Copeland Sentronic Oil Pressure Safety module on all Discus compressors and
the Electronic Motor Protector module in 4D & 6D compressors. Note: 2D & 3D compressor will
still have Internal Line Break overload protection.
Disconnect switch (CE and Australian Approved machines only)
Indicates hours of machine operation. Energized when compressor is operating.
Cutter Motor Starter (Manual motor starter and contactor). Cycles the fan motor(s) of air-cooled
condenser on and off. Activated by the condenser pressure switch (Air-cooled Machines ONLY).
Provides short circuit and over current protection. Stops fan motors in the event of a mechanical or
electrical malfunction that results in excessive motor amperes.
Regulates the ice thickness by reading freezer pressure and initiating the thaw period at the set
point.
Short circuit protection for control circuit and crankcase heater on 200/230V machines.
Protection for primary side of transformer on 400/460V machines
Short circuit protection for power monitor (Optional)
Pump Motor Starter (Manual motor starter and contactor). Starts and stops pump motor. Provides
short circuit and over current protection. Stops water pump motor in the event of a mechanical or
electrical malfunction that results in excessive motor amperes.
Used to stop machine immediately (Should be used for emergency stopping only).
Used for starting machine or manually harvesting. Will initiate a harvest cycle whenever pushed
with the "Clean/Off/Ice" selector switch in the "Ice" position and machine operating in a freeze
cycle.
Power distribution block.
Stops the machine when there is a power failure or interruption. Also, stops the machine when the
high/low pressure switch, oil pressure safety control, pump overload, cutter overload, compressor
overload or the control circuit breaker is tripped. If the "Stop" button was pushed, any of the
safeties tripped, or there was a power outage, the machine must be manually restarted by pushing
the "Start" button.
(Optional) Phase monitor for compressor motor. Monitors voltage in / out of compressor motor
contactor. Will shut machine off in voltage is outside of set parameters.
Used to select operating mode of machine. When in clean position, only the water pump will run.
This allows cleaner to be circulated through the freezer without making ice. In the off position, the
machine will shut down after the completion of a freeze and harvest period. In the ice position,
machine will cycle on and off based on a control signal (i.e. bin thermostat or timer) or run
continuously until manually stopped by setting the switch to the "Off" position.
Controls the time of the thawing period.
Numbered for multiple wire connections and ease of troubleshooting.
Customer connections for remote Air Cooled condenser.
Customer connections for auxiliary contacts on cutter, pump and compressor contactors.
Description of Control Panel Component Function
TABLE 6-2
03TA Service Manual
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