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High Speed / Red (Black when 1-spd pump/component)
Low Speed / Black
Common / White
Ground / Green
Note flat sides in connector
System Plug Pinouts
IMPORTANT: For the following set of instruction, the power must be off when plugging
in or unplugging sensors.
1) Check sensor wires for cracks or damage that may indicate the presence of a rodent.
2) Inspect connections of both sensors on the circuit board. The plugs must be clean.
3) If the spaside has the error message of Sa or Sb, this is an indication of a faulty sensor or
possibly a faulty circuit board.
4) With the power off to the spa, unplug the two sensors from the circuit board and exchange
their positions (i.e., plug the one that was in the “Sen. A jack into the “Sen. B jack and vice
versa).
5) Power up the spa, if the error message did not change (i.g. original error message was Sa
and still displays Sa) this is an indication of a faulty circuit board. If the error message
changed (i.g., original error message was Sa and now displays Sb) replace the sensor in the
corresponding plug on the circuit board.
6) When replacing sensors, please keep in mind that the heater assembly will contain water
pressure even with the spa’s power off. Close available slice valves and proceed with caution
not to allow water on the surrounding electronics.
Testing / Replacing the Sensor Set
Sensor A
Sensor B