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7.0 Troubleshooting Using The Control Panel
7.1 Control Panel Displays
Complete operating instructions for the control panel can be found in the owner's manual. The hot tubs self-
diagnostic control system constantly monitors the hot tub for proper operation. When anything goes wrong,
the control panel displays a message for the user which may result in a service call. Refer to Section 7.3
below for a listing of error messages and probable causes.
7.2 Control Panel Default Display
The control panel displays the following information during initial start-up:
1. Control panel displays current software microchip revision, then
2. Control panel displays "888" and all indicator LED's are lit, permitting visual inspection of all
display segments and indicator lights for proper operation.
3. After the initial start-up sequence ends actual water temperature is displayed. If the water
temperature at this time is less than the factory default temperature setting of 100°F (38°C):
•
J-LX and J-LXL Models: The low speed pump, circulation pump and heater will turn on
and run until the water temperature rises to the factory default temperature setting. Then
the low speed pump and heater turn off. The circulation pump will continue to run for the
remainder of the 8 hrs.
•
2011-2013 J300 and J200 (2011-2012 with Circulation Pump) Models: The circulation pump and heater
will turn on and run until the water temperature rises to the factory default temperature setting. Then the
heater turns off and the circulation pump remains on for the remainder of the programmed cycle.
•
J200 (2011+ without Circulation Pump) Models: The low speed pump and heater will turn on and oper-
ate until the water temperature rises to the factory default temperature setting, then both turn off.
Approximately two minutes after initial start-up, the first filtration cycle begins to operate. The filtration
cycle can be modified any time after the start-up sequence ends. You will be able to select a pre-programmed
filter cycle and reset your temperature setpoint at this time. Press either COOLER or WARMER button once at
this time to display the current temperature setpoint. You can change the setpoint by pressing either COOLER
or WARMER button within 3 seconds. Each button press increases or decreases the temperature setpoint by
one degree. Three seconds after the setpoint is set, the display defaults back to actual water temperature.
7.3 Control Panel Status and Error Messages
SN1 Nonfunctional Hi-limit Sensor (All Models)
Open or shorted hi-limit sensor. Heater is deactivated. Refer to test steps 1-2 below:
1. Turn off main breaker to hot tub. Refer to appendix, page 56, for expected hi-limit sensor
resistance/water temperature values.
2. Remove hi-limit sensor connector from circuit board test point 21. Refer to pages 50-53 for your circuit
board configuration. Set ohmmeter to 100 kΩ - 200 kΩ range, then measure resistance across hi-limit sen-
sor wires (refer to page 56). If sensor resistance tests OK (± 200 Ω), check sensor connections. If con-
nections are OK, replace circuit board. If sensor resistance is incorrect, replace hi-limit sensor.
SN2 Nonfunctional Temperature Sensor (All Models)
Open or shorted temperature sensor. Heater is deactivated. Refer to test steps 1-2 below:
1. Turn off main breaker to hot tub. Refer to appendix, page 56, for expected hi-limit sensor
resistance/water temperature values.
2. Remove temperature sensor connector from circuit board test point 21. Refer to pages
50-53 for your circuit board configuration. Set ohmmeter to 100 kΩ - 200 kΩ range, then
measure resistance across temperature sensor wires (refer to page 56). If sensor resistance tests OK
(± 200 Ω), check sensor connections. If connections are OK, replace circuit board. If sensor resistance is
incorrect, replace temperature sensor.
Example sequence
shown. Actual sequence
can vary depending on
model.
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Troubleshooting
