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New Generation Hot Tubs Have the control system communicate what it sees as an issue to the topside panel in some type of code.
Jacuzzi Hot Tub uses several type of topsides including LED, LCD, and Scripted Topside Readouts
Below Find the Error Code, It's Meaning, and HELP to correct.
Error Codes on J-200 and J-300 with LED Topside
Error Code Meaning What to Do
LED Sn1 Failure of the Hi-Limit Sensor

Replace OH/High Limit Sensor Go To Sensors

LED Sn2 Failure of the Temp Sensor

Replace Temp Sensor Go To Sensors

LED FL1 Lack of Water Flow or Failure of Flow or Pressure Switch

Remove filter and restart. If returns, if you DO see water moving without pushing JET button, failure of flow switch or pressure switch, whichever your spa has. If you do NOT see water automatically moving when you turn main power on, then likely the circ pump. Rare occasions its the board.

Failure of Flow or Pressure Switch

Replace Flow or Pressure Switch. Go To Switches

LED COL "Cool" condition exists. Temp 20 degrees or more below set temp. Spa is attempting to heat. Automatic; Do nothing. Will stop when spa is heated.
LED ICE Freeze Protection On

Automatic; Do nothing. Spa will turn on jet pumps to keep spa from freezing. Only panic if spa isn't heating.

LED ICE Water is Above 112 degrees. Spa has turned on Low Speed pump in attempt to cool the spa

Spa automatically tries to cool spa. If water goes above accepted range, spa will shut down. Typically this means the board has failed and leaving heater on when it should not. If water and heater do not get hot but the spa goes into OH, either the OH sensor or the board has failed.

LED Watchdog "Watchdog" mode

Most common cause is failure of the temp sensor. Replace. If that doesn't solve then likely a board failure. See >Watchdog

LED BLB Replace ClearRay Bulb Reminder to replace the UV ClearRay Bulb.
Error Codes on J-300 and J-400 with LCD Topside
Error Code Meaning

What To Do

Failure of the Hi-Limit Sensor

Replace OH/High Limit Sensor Go To Sensors

Failure of the Temp Sensor

Replace Temp Sensor Go To Sensors

Failure of Temperature Sensor

Replace Temp Sensor. Go To Sensors

Lack of Water Flow or Failure of Flow or Pressure Switch

Remove filter and restart. If returns, if you DO see water moving without pushing JET button, failure of flow switch or pressure switch, whichever your spa has. If you do NOT see water automatically moving when you turn main power on, then likely the circ pump. Rare occasions its the board.

Failure of Flow or Pressure Switch

Replace Flow or Pressure Switch. Go To Switches

Error Cool "Cool" condition exists. Temp 20 degrees or more below set temp. Spa is attempting to heat.

Automatic; Do nothing. Will stop when spa is heated.

Freeze Protection On

Automatic; Do nothing. Spa will turn on jet pumps to keep spa from freezing. Only panic if spa isn't heating.

Water is Above 112 degrees. Spa has turned on Low Speed pump in attempt to cool the spa

Spa automatically tries to cool spa. If water goes above accepted range, spa will shut down. Typically this means the board has failed and leaving heater on when it should not. If water and heater do not get hot but the spa goes into OH, either the OH sensor or the board has failed.

"Watchdog" mode

Most common cause is failure of the temp sensor. Replace. If that doesn't solve then likely a board failure. See >Watchdog

Panel Sensors pressed too fast. Temporary deactivating

Slow down pushing buttons.

Error Hot Circuit Board temp above normal. Shuts down operation until the board cools

Will reset when equipment area cools.

Panel connection/operation to board is faulty

Secure connects or in rare cases, either the board or topside has failed.

Error Codes on J400+ Models with SCRIPT Topside
Error Code Meaning What To Do
Open Flow Lack of Water Flow or Failure of Flow or Pressure Switch Remove filter and restart. If returns, if you DO see water moving without JETS on, likely flow switch failure. If you Do NOT see water automatically moving when you turn main power on, then likely the circ pump. Rare occasions its the board.
Closed Flow Failure of Flow or Pressure Switch

Replace Flow Switch. Go To Switches

Toggling Flow Switch Flow switch turning on/off erratically Flow switch acting eratic. Recommend to replace switch. Go To Switches
Shorted Hi-Limit Sensor Failure of the High Limit Sensor

Replace OH/High Limit Sensor Go To Sensors

Open Hi-Limit Sensor Failure of the High Limit Sensor

Replace OH/High Limit Sensor Go To Sensors

Shorted Temp Sensor Failure of the Temp Sensor

Replace Temp Sensor Go To Sensors

Open Temp Sensor Failure of the Temp Sensor

Replace Temp Sensor Go To Sensors

Shorted Ambient Temp Sensor Failure Of controller temp sensor Contact Service Help
Open Ambient Temp Sensor Failure of controller temp sensor Contact Service Help
Closed Flow Switch Flow Switch Failure

Typically failure of flow switch. Rare occasion its the board.  Replace Flow Switch. Go To Switches

Frozen Flow Switch Flow Switch Failure and Water Is Cold

Typically failure of flow switch AND water is getting dangerously cold. Rare occasion its the board.  Replace Flow Switch. Go To Switches

Cool Water more than 20 degrees set point Topside warning that water is 20 degrees below temperature you set. Often occurs when changing water.
Freeze Water temp is possible of freezing Topside warning the spa is cold enough to freeze. Control will try to avoid freezing by turning jet pumps on. Very important warning and requires action.
Overheat Water is Above 112 degrees. Spa has turned on Low Speed pump in attempt to cool the spa Spa automatically tries to cool spa. If water goes above accepted range, spa will shut down. Typically this means the board has failed and leaving heater on when it should not. If water and heater do not get hot but the spa goes into OH, either the OH sensor or the board has failed.
Do NOT Use Hot Tub.
Watchdog "Watchdog" mode Most common cause is failure of the temp sensor. Replace. If that doesn't solve then likely a board failure. See >Watchdog
Watchdog Freeze Protect "Watchdog" mode Spa below 40 degrees. Jet pumps will be turned on to avoid freezing
Control Overheat Control Box senses overheat The physical control box is overheating. When triggered the spa equipment area needs to be cooled down be either opening the equipment area or shading the area.
Panel Com Topside panel and Control Box The control box is not getting clear or any information from the topside control.
Stereo Com Stereo to Control Box The control box is not getting clear or any information from the stereo.
Wi-Fi Com WiFi to Control Box The control box is not getting clear or any information from the Wi Fi.
ClearRay Replacement ClearRay Bulb Reminder the ClearRay Bulb must be replaced
ProCarity Reminder Proclarity/Filter Reminder to service or replace Proclarity filters and debris bag.
ProClarity Depth Filter Reminder ProClarity Depth Filter Reminder Depth Filter in filter system needs to be replaced.
Water Refresh Reminder Water Age Reminder to change your spa's water
Extended Temp Activated Raise Max Temp By default the spa is limited to a maximum temperature of 104. With this activated the maximum is raised to 106 degrees.

 

 
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