Appendix Diagnostics - Jacuzzi COMMANDER II JC5 Installation And Operation Manual

Appendix – BUILT-IN DIAGNOSTICS
The Commander II Model JC5 Control Box contains a way to display a diagnostic report on its operation. It allows the user to view
the salt concentration, the water temperature, and the Electrolytic Cell voltage and amperage. This is provided for a technician to
evaluate the performance of the Commander II Model JC5 without the need for special equipment. The values are measured by
counting the number of flashes of the lights, as described below.
To access and interpret the diagnostics, follow this procedure:
To start the diagnostic procedure, press and hold both the UP and DOWN buttons at the same time. Hold them pressed until
the output display lights go out, leaving just the bottom light illuminated (about 5 seconds).
1. The first value to be displayed is the salt concentration in Parts Per Million (PPM). This value is measured by counting
the number of flashes of the top 3 lights. In the case of salt, the top light is not used, the next to the top flashes the 1000's
digit and the third light flashes the 100's digit in ppm.
2. The second value is the water temperature in degrees Fahrenheit. When this is displayed, the second light from the
bottom is on. The top light flashes the 100's digit, the next the 10's digit and the next the units of temperature.
3. When the third light from the bottom is on, the cell voltage is displayed. The top light is not used. The second light
flashes the 10's digit and the third the units of voltage.
4. When the fourth light is on the cell current in amperes is being displayed. The top light displays the 10's digit (not
normally used), the next the units and the third the tenths of amps.
The diagrams below summarize the built-in diagnostic displays.
SALT
BUILT-IN DIAGNOSTICS
Example: 2 flashes/pause/8 flashes/pause Read: 2,800 PPM
Example: 8 flashes/pause/6 flashes/pause Read: 86 Degrees F
Example: 2 flashes/pause/8 flashes/pause Read: 28 Volts
Example: 5 flashes/pause/5 flashes/pause Read: 5.5 Amps
TEMPERATURE
x100 °F
x10 °F
x1000 ppm
x1 °F
x100 ppm
(Temperature)
(Salt)
VOLTS AMPS
x10 A
x10 V x1 A
x1 V x0.1 A
(Amps)
(Volts)
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