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FL1 & FL2 Water Flow Problem (All Models)
• FL1: ow switch not closed when circulation pump is running. Heater is deactivat-
ed. Proper water ow is inhibited or ow switch may be obstructed, misaligned, or
defective. Refer to troubleshooting steps 1-5 below:
1. Remove lter and allow air to bleed out of cartridge. Check lter for trapped air.
2. Check for proper water level.
3. Check for clogged lter cartridge.
4. Check for sticking or damaged oating skimmer.
5. If problem persists, refer to Section 7.4 (page 16) for ow switch testing instructions.
• FL2: ow switch switch closed when pump is not running. Heater is deactivated and pump may
or may not turn on. Flow switch is defective. Refer to Section 7.4 (page 16) for switch testing
instructions.
COL Cool Condition (All Models)
If the water temperature drops 20°F (11°C) below the set temperature, the circulation
pump and heater will activate to raise the water temperature within 15°F (8°C) of the set
temperature. No corrective action is necessary. This condition is common during water
changes and/or rst time ll ups.
ICE Freeze Condition (All Models)
Freeze Protection - A potential freeze condition has been detected. Water temperature is
below 55°F (12.78°C). No action is required. Jets Pump 1, Jets Pump 2 and the circula-
tion pump will activate for 10 minutes, then turn off. Then the circulation pump and the heater will acti-
vate for 10 minutes. The two cycles shall repeat until the water temperature reaches 65°F (18.33°C).
OH Overheat Condition (All Models)
Water temperature is above acceptable limits. DO NOT ENTER HOT TUB WATER!
Water temperature has reached 116°F (47°C) and the low speed pump has activated to
circulate water through the heater to cool it down for approximately 6 minutes. Refer to test steps 1-4
below:
1. Verify actual water temperature with an accurate thermometer. If actual water temperature is less
than 110°F (44°C), proceed to steps 2-4.
2. Turn off main breaker to hot tub. Refer to appendix page 49 for expected hi-limit/temperature
sensor resistance/water temperature values.
3. Remove hi-limit sensor connector from circuit board points 22. Verify that the heater is not
excessively hot. Refer to pages 43-46 for your circuit board conguration. Set ohmmeter
to 100-200 kΩ range, then measure resistance across sensor wires (refer to page 49). If
resistance tests OK (± 200Ω), check wiring harness connections. If wiring harness connections
test OK, replace circuit board. If sensor resistance is incorrect, replace hi-limit sensor.
4. Set ohmmeter to 100-200 kΩ range, then measure resistance across temperature sensor wires
(refer to page 49). If resistance tests OK (± 200Ω), replace circuit board. If temperature sensor
resistance is incorrect, replace sensor.
In extreme bitter cold weather 32°F (0°C) we recommend you program the circulation pump
to run 24 hours.
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