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A18 Glossary of Terms
Circuit Board: Printed circuit board assembly that distributes voltage to selected compo-
nents.
Control Panel:
Component that allows user to access functions provided by the circuit
board.
Ammeter: Device which measures electrical current conducted through a wire or elec-
trical device.
Eprom: Chip on circuit board that stores hot tub software.
Flow Switch: Switch that informs circuit board there is sufficient water movement to acti-
vate heater. This switch identifies the presence or absence of water flow.
Hi-limit Sensor/Disk: Sensor that monitors water temperature inside the heater.
Jumper:
Device on circuit board that electronically connects (bridges) two points
together.
Ohmmeter: Device that measures the resistance in ohms (Ω) of a component or tem-
perature sensitive device (e.g. temperature sensor, heater element etc).
Ozonator: A device that produces ozone gas by passing air through a Corona discharge
(high voltage arc). All LED models introduce ozone 24 hours a day until a
JETS button is pressed or summer logic is activated.
Pin Assignments: Locations identified by numbers on circuit board.
Sensor Connector: Plug in connector containing the temperature sensor and hi-limit sensor
device connections.
Summer Logic: Deactivates circulation pump and aftermarket ozone generator when hot
tub water reaches 2 °F (1 °C) above the set temperature. Hot tub water
must be 95 °F (35 °C) or higher for summer logic to activate.
Temperature Sensor: Sensor that monitors hot tub water temperature.
Transformer: Device that converts primary high voltage AC signal to a secondary low
voltage AC signal.
Voltage Meter: Device that measures AC or DC voltage potentials across components or
from a specific test point to ground.
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