Question about Jandy Laars Lite2 Ld 400,000 Btu Heater

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Jandy lite2 heater has fl5 error code, all voltages look good

All test points have acceptable voltage except will not energize igniter. Power control board is expensivr to replace on a guess.

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  • khadiyev May 11, 2010

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If all voltage test points are within range, then it's 1 of 3 problems: Power Conversion Plug is faulty; Power Control Board is faulty; or Controller is faulty. Jandy says there is no way to test any of these directly. They recommend that you replace both the Power Conversion Plug (~$35) and the Power Control Board (~$230). Apparently when one fails, it can cause the other to fail as well. They said that unless the Controller has a lot of corrosion on it, then it probably is not the issue.

Posted on May 20, 2010

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1 Answer

Jandy lite 2. How do I correct an fl 5 error?


FL5 is related to input voltage. You state that the voltages check out. Service code FL5, "brown-out condition exists",
will reset after the condition has been resolved.
However, the reset may take up to 3 minutes. The LJ
controller checks the power supply voltage every 3
minutes. If the supply voltage drops below 85% of the
nominal supply voltage, the display will show the FL5
service code and the heater will not start the ignition
sequence. The controller will check the supply voltage
again 3 minutes later. If the low voltage condition still
exists the FL5 service code will remain. If the actual
supply voltage is above 85% of the nominal supply
voltage, the service code will clear automatically from
the display and the heater will resume normal operation.
If the heater was in either 'POOL' or 'SPA' mode
when the brown-out condition was detected, it will
remain in that mode when the condition is resolved.
If
the water temperature is less than the thermostat
setting, the ignition sequence will start automatically
and the heater will operate normally.

Jun 17, 2015 | Jandy Laars Lite 2 Pool Heater 175,000 BTU...

1 Answer

What part failure produces error code FL 4?


igniter failure. this is a problem with either the hot surface igniter, or the main circuit board. if the problem is the board you must replace the high voltage chip along with it

Aug 18, 2014 | Jandy Lite2 Heater LJ175P - 175,000 BTU LP

1 Answer

What does FL-5 mean on a laars lite2 heater


If all voltage test points are within range, then it's 1 of 3 problems: Power Conversion Plug is faulty; Power Control Board is faulty; or Controller is faulty. Jandy says there is no way to test any of these directly. They recommend that you replace both the Power Conversion Plug (~$35) and the Power Control Board (~$230). Apparently when one fails, it can cause the other to fail as well. They said that unless the Controller has a lot of corrosion on it, then it probably is not the issue.

May 23, 2014 | Jandy Laars Lite2 Ld 400,000 Btu Heater

1 Answer

Laars lj 400 heater has blown both inline fuses. Hot surface ignitor was replaced and new fuses installed. Both fuses burnt again. Safty curcuit was bypassed and fuses replaced again. BURNTagain! upon...


It is likely the voltage selector board, the smaller of the two, that is bad. In the past Jandy has recommended changing the heater over to 115V as a better option if you keep loosing the board(s). I forget their exact logic as to why but the last one of those I had behave like this was a few years ago and once we replaced all the burned up electronics and converted the power and the heater over to 115 it never failed again.

Perhaps Jandy would explain further if you need additional info, try calling:
1-800-822-7933

Sep 08, 2011 | Jandy Laars Lite2 Lj 250,000 Btu Heater

1 Answer

I have a volt meter and would like to use it to test some connections to figure out the heater does not light. Can you tell me where to place the leads?


First start at the line voltage coming into the unit. The LD model is supplied power from an external source. Once line (supply) voltage is checked, start at the transformer and trace all the circuitry. Meter set at 50 VAC should do it. The supply voltage will supply 120 VAC to the igniter. Here is a link to the PDF manual fro Laars/Jandy/Waterpik Lite2 heater

Jun 06, 2010 | Jandy Laars Lite2 Ld 400,000 Btu Heater

1 Answer

My lite 2 system will not light . First it registers F7 and know it registers F5.What to do now


assume you mean fl7 and fl5 the heater has been intalled electrical wrong check your voltage and see the heater installation some miswire the heater

Oct 06, 2009 | Jandy Laars Lite2 Ld 400,000 Btu Heater

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