Vogt TUBE-ICE 05TA, Service Manual

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05TA Service Manual
ELECTRICAL CONTROLS
8/13/01
6-3
Description of Component Function
CC –
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.
CB1 –
Secondary pump/cutter motor protection.
CB2 –
Secondary condenser fan motor protection.
CB3 – Overload and short circuit protection for control circuit and crankcase heater.
CR – Controls sequencing of Freezing and Thawing circuits. Energized during thawing period.
CU – Stops cutter motor in the event of a mechanical or electrical malfunction that results in excessive motor
amperes.
P – Stops water pump motor in the event of a mechanical or electrical malfunction that results in excessive motor
amperes.
PF –
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.
FC –
Cycles the fan motor(s) of air-cooled condenser on and off. Activated by the condenser pressure switch (Air-
cooled Machines ONLY).
FPS – Regulates the ice thickness by reading freezer pressure and initiating the thaw period at the set point.
T – Controls the time of the thawing period.
ET – Indicates hours of machine operation. Energized when compressor is operating.
SS – 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.
PB1 –
Used to stop machine immediately (Should be used for emergency stopping only).
PB2 –
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.
TB –
Numbered for multiple wire connections and ease of troubleshooting.
TABLE 6-2
Description of Control Panel Component Function