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Laars LX Pool Heater error message Ext SW1 Service

Laars LX Pool Heater error message Ext SW1 Service

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  #1  
Old 03-06-11, 04:47 PM
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Laars LX Pool Heater error message Ext SW1 Service

Anyone know what needs to be checked or replaced when error message Ext SW1 service is showing up on the screen. Once I turn it on the heater will not do anything except measure the temperature of the water and blink the error message. Any help will be much appreciated.
 
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  #2  
Old 03-07-11, 07:47 AM
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can be a number of things, are you electrical machanical? Do you have a volt meter? I can try to walk you through diagnose. If you have and are ready, first check voltage between ground and terminal 5 of safety switch connection to the GUI should have 24v let me know.
 
  #3  
Old 03-07-11, 01:39 PM
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Laars LX Pool Heater error message Ext SW1 Service

I have a little electrical knowledge. Yes, I have a volt meter.

voltage between ground and terminal 5 is 28V in the off position. As soon as I turn to the on position I measured 0V.

I went ahead and measured 3-9 both in the off and on position. What do you think?

OFF / ON
3 0V / 3 0V
4 28V / 4 0V
5 28V / 5 0V
6 28V / 6 0V
7 27V / 7 27V
8 27V / 8 27V
9 28V / 9 28V
 
  #4  
Old 03-07-11, 05:51 PM
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check volts between ground and left hand terminal of fuse link.
If 24v check volts right side of fuse link. If got 24v check volts between ground and left trminal of high limit manual reset(located in flue vent).
Let me know how these go...
 
  #5  
Old 03-09-11, 04:51 AM
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Good News First it's working thank you very much.

Checked volts between ground and left hand terminal of fuse link. 0V
Check volts between ground and left trminal of high limit manual reset(located in flue vent) just for kicks and measured 0V.

I decided to check the volts on the fuse link again just to make sure I was making good contact with my meter and all the sudden the heater fired right up.

Maybe I reset the high limit manual reset and didn't realize it. What do you think?
 
  #6  
Old 03-09-11, 08:28 AM
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could have reset or could have been loose wire... Either way good news!!
 
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