Below you will find help on understanding the code and then what to do, if anything.
| Topside Code | Quick Reason | Expanded Reason | Fix | Parts Need |
|---|---|---|---|---|
| Sn1 or Sn | Sensor | The high limit sensor is out of normal acceptable range | Replace High Limit Sensor | Replace OH Sensor |
| Sn2 or Sn | Sensor | Temperature Sensor is out of normal range. | If water is NOT HOT replace Temp Sensor | Replace Temp Sensor |
| Flashing FLO or Flashing FL | Water Flow | Water flow sensor is not seeing adequate or any water flow. Unit will not turn on the heater. | Determine IF water flow is sufficient. Try removing filters. Do YOU see water flow? | If you do see water flow, replace flow switch or pressure switch. If you do NOT see water flow, replace either circulation pump or #1 jet pump depending on model you have. |
| Solid FLO or Solid FL | Failed Switch | The switch is not operating properly. | Replace flow or pressure switch depending on model. | Models with flow switch typically have a 24/7 circ pump. Models using larger 2 speed #1 Jet Pump have a pressure switch. |
| COL or COOL | Water Temp | Temp Sensor sees water is 20 degrees or more below set point. | If water is heating, do nothing. Error will stop when water is at temp. | If error persists and water isn't heating you have to determine why the spa isn't heating. Usually a heater issue. Sometimes a pcboard issue. |
| ICE | Water Temp | Spa's temperature has fallen into dangerous temp. | PC Boards are design to go into an emergency stance including turning one or more jet pumps on periodically to avoid the spa from freezing. | If error persists and water isn't heating you have to determine why the spa isn't heating. Usually a heater issue. Sometimes a pcboard issue. |
| OH | Water Temp | Temp Sensor sees water is 112 or higher. | Unit will typically turn on jet(s) to lower the water temp through water movement. | OH often indicates either the topside temp readout isn't correct (compare readout with real temp) OR the pcboard is ignoring what the temp sensor is saying. If that happens you normally must replace the pcboard. If the temperature on the topside is different that the real time temp, replace the temperature sensor. During summers your unit can simply overheat due to solar heat. Try either changing filter times and length or prop the spa cover up to allow heat to escape. |
| Topside Code | Quick Reason | Expanded Reason | Fix | Parts Need |
|---|---|---|---|---|
| Sn1 | Sensor | The high limit sensor is out of normal acceptable range | Replace High Limit Sensor | Replace OH Sensor |
| Sn2 | Sensor | Temperature Sensor is out of normal range. | If water is NOT HOT replace Temp Sensor | Replace Temp Sensor |
| FL1 | Water Flow | Water flow sensor is not seeing adequate or any water flow. Unit will not turn on the heater. | Determine IF water flow is sufficient. Try removing filters. Do YOU see water flow? | If you do see water flow, replace flow switch or pressure switch. If you do NOT see water flow, replace either circulation pump or #1 jet pump depending on model you have. |
| FL2 | Failed Switch | The switch is not operating properly. | Replace flow or pressure switch depending on model. | Models with flow switch typically have a 24/7 circ pump. Models using larger 2 speed #1 Jet Pump have a pressure switch. |
| COOL | Water Temp | Temp Sensor sees water is 20 degrees or more below set point. | If water is heating, do nothing. Error will stop when water is at temp. | If error persists and water isn't heating you have to determine why the spa isn't heating. Usually a heater issue. Sometimes a pcboard issue. |
| ICE | Water Temp | Spa's temperature has fallen into dangerous temp. | PC Boards are design to go into an emergency stance including turning one or more jet pumps on periodically to avoid the spa from freezing. | If error persists and water isn't heating you have to determine why the spa isn't heating. Usually a heater issue. Sometimes a pcboard issue. |
| OH | Spa is over 112 degrees | Spa's temperature is raising above acceptable range. Spa will shut down to cool down. | Your spa should never go above 112. First common reason is water isn't that hot but temp or oh sensor has tripped. The fault in summer can be caused by solar heat. Change filter cycle or even prop up cover. Also for summer heat you may need to prop the cover open to allow heat to escape. Lastly but possible is the pcboard has failed and simply keeps producing heat. | If topside temp doesn't match actual, replace temp sensor. If water isn't cool but trips OH, replace OH sensor. Lastly focus on pcboard. Contact us for help. |
| --- or ---- | Watchdog | Pcboard see's an error it can't identify | Watchdog can be triggered by almost any component in the spa. Experience says its likely the TEMP SENSOR. | First part to replace is your temperature sensor. It has a low price and almost always resolves. |
| HOLD | Too many functions | Activating too many functions rapidly | The board is receiving too many button pushes too fast. | Slow down |
| Thermometer | Pcboard | Pcboard box is too hot | Will automatically stop reading when box cools down. | Nothing |
| PnL | Panel Error | Bad connections on plug/socket | Common cause is loose wire. Unplug and replug the topside to the board. ONLY do with power OFF. | Reconnect cord(s) |
| Sn3 | Temp Sensor | Temp Sensor is out of proper range | The board is seeing the temperature sensor's values are not correct. | Replace Temp Sensor |
| Topside Code | Quick Reason | Expanded Reason | Fix | Parts Need |
|---|---|---|---|---|
| FLtr | Filtering | Unit is in Filter Cycle | Nothing to fix. Simply informing you it's in normal filter times | No Fault |
| HEAT | Heating | Unit is heating to set point | Nothing to fix. Unit is heating. | No Fault |
| Fr | Freeze | Water has dropped below 45 degrees | Low speed pump will come on and remain on until spa heats above 48. | No Fault. Telling you there may be heating issues. |
| SOH | Overheat | Water is above 113 | If water IS HOT, must correct cause. | Process to see why the spa overheated. If the topside temp IS correct, then indications are a failed pcboard or topside. If the topside readout isn't correct then usually the temp sensor. Replace |
| HOH | Overheat | Water is above 116 | Unit will run low speed pump until water cools. | If its summer, might be caused by solar heat. Try different filter cycle or length of cycle. Also try simply propping the spa cover open to allow heat to excape. During winter, only reason the spa will overheat are the pumps do not turn off (heat from pumps) or heater will not turn on (either the pcboard or topside) |
| tS | Temp Sensor | Temp sensor is out of range | The pcboard will constantly monitor the sensors. This error states bad temp sensor | Replace temperature sensor |
| LS | OH Sensor | OH sensor is out of range. | The pcboard will constantly monitor the sensors. This error states bad temp sensor | Replace temperature sensor |
| FLO | Flow Error | Not enough water flow. | Unit checks pressure switch to be closed when the heater pump is on. Its not seeing flow. | If you DO see water moving, replace pressure or flow switch. If you do NOT see water moving, replace either low speed jet pump or circ pump (depending on your setup) |
| Topside Code | Meaning | Solution |
|---|---|---|
| dCP | Improper voltage to pcboard | Can try replacing transformer but likely the pcboard itself. PCboards are no longer available. |
| HtS | Improper readings from Temp Sensor | Usually replacing sensor resolves |
| FLO | Water Flow | PCB is seeing a low amp demand from circ pump. Typically this is a faulty reading. |
| PS1 | Low Water Flow | PcBoard sees low flow/pressure when pump is on and not turning on the heater. First try removing the filter. If you DO see water moving then replace the pressure/flow switch. If you do NOT see water moving, replace pump. |
| PS2 | Pressure Switch | Failed pressure or flow switch. Replace. |
| FC | Freeze Condition | Water has dropped below 60 degrees. Spa will try to keep water from freezing by turning on pump. When water rises above 50 the error will be removed. |
| Ht | Hot Water | If water goes above 110 degrees the spa will turn off heater and turn on jet pumps/air blower to try to cool spa down. If water is not hot replacing the OH sensor usually corrects. |
| Oht | Overheat | Spa see water or equipment area above 125 degrees. Spa will shut down. Must manually restart. If the water is not hot replacing the OH sensor usually resolves error. |
