you walk out to use the spa or hot tub and immediately you know that something is wrong. In both cases the water is cold, which makes for a less pleasant soaking or no work at all. The spa looks dead.
If you have a digital system in your spa or hot tub with a digital control top, you first look at the top control the display to see if it will tell you what is going on. Looking at your top control, you see how the SN1 and FLO abbreviations or "----". What do these symbols and abbreviations mean?
The symbols and abbreviations appear on the top control thermal baths are called error codes. They tell you that the spa has detected a situation for which then tries to identify. Several equipment manufacturers are using different codes to identify certain conditions detected by the diagnostic system of car spa.
will look at the two thermal systems that I get the most questions about. Balboa controls and Sundance Spas controls.
Balboa, one of the most common spa controls manufacturers, uses the following codes.
pd = Power supply, drives running on backup battery
OH = read sensors 112-118 degrees
Flo = flow switch malfunction or improper pressure
= Cooling water temperature at 20 degrees subset
Punto= ICE was detected potential freeze condition
Sn1 = Hi-sensor malfunction limit
Sn3 = malfunction temperature sensor
LOC = lock failure -. possible pump or ozone peak
(----) = unknown water temperature (appears when Spa is first turned on after charging).
Sundance Spa, one of the largest spa manufacturers, uses the following error codes.
ILOC = Block failure - can pump or ozone peak
FLO = pressure switch malfunction or flow switch failure (specific system ).
Keep = Flow switch (heater is disabled . The pump can also be turned off).
Keep = panel buttons pressed for several times to quickly.
HOT = PCB temperature exceeds acceptable limits - air blower on.
= ICE Potential freezing conditions.
PnL = Communication between the panel and the circuit card is defective.
(----) = "watchdog" ( spa is deactivated) has detected a problem. (The system can not identify)
Sn1 = OPEN SENSOR (heater is disabled ) or short-SENSOR (spa is deactivated).
Sn3 = SENSOR OPENING OR thermistors ( heater disabled).
(This is not a complete list and your thermal error codes can vary depending on the year and model.)
to note the similarities and differences between the codes. Both use FLO, SN1, SN3 and ICE, and so on, the differences include, (----). Meaning totally different things between the two systems. You need to use the error codes for the control system to accurately diagnose the problem with your well-being.
lets take a quick look at FLO error code. Both Flo state producers is caused when a pressure switch malfunction or a flow switch malfunctions. This may be the case in many situations, however, it is my experience that the number one cause of a spa that displays the error code "FLO" is due to a dirty filter or worn.
(Some manufacturers try to narrow the FLO error with different display of the code, ie, a solid FLO or a FLO (FLO mistake of flashing flashing off and on).
flashing FLO = heater is activated, the pump is on and flow / pressure switch are open. (This means that the system detects the spa has called for heat, the PC card power is applied to the pump, but did not detect the flow of water. it turns off the heater to prevent damage to the heater).
Solid FLO = pump is off, the flow or pressure switch is closed . (meaning, the system should not be detecting water flow because the PC Council did not apply power to the pump, but the flow switch is saying there is no water flow. the flow switch or pressure is stuck in the closed position or shorted.)
a dirty filter or worn can cause various error codes to display. "OH" (in focus) because the water is not moving fast enough through the vessel heater and the upper limit detects too hot water temperature. "FLO" because the filter does not allow enough water through the heating vessel to enable flow or pressure sensor. The filters must be replaced every year or twice a year if you use two different filters. The filters must be thoroughly rinsed each month, and cleaned properly every 3 months or so.
For more information about error codes for your well being, visit Spa supply of parts, or contact your spa manufacturer for a list of codes that affect your well-being. If in doubt, call a technician spa for the help and fault repair.
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