KPA1500 fans not working in auto mode

[NK6A-Don Minkoff]

Has anyone had a problem with the fans not turning on automatically in
the KPA1500?

I realized that operating today in WPX that the  temp was reading over
43 c and no fans.  Manually turned them on.  Reloaded firmware and still
no fans when getting over 40 deg c.  Ser no. 316. Ver. 2.38.

I'll have to wait for Elecraft support but if anyone else has had this
problem I would be interested in the fix.  Temp sensor?

--
Don Minkoff
NK6A

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[ANDY DURBIN]

"I realized that operating today in WPX that the  temp was reading over 43 c and no fans."

At what temperature did you expect the fans to start?  KPA500 switches fans on at 50 deg C.

Wouldn't the temperature readout be derived from the same thermistor that provides temperature for fan control?

73,
Andy, k3wyc
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[Dave wo2x]

I do not remember the exact values but the latest firmware changed the start & stop points for the different fan speeds. If it had gone to 50c without the fans turning on then I would definitely be concerned.

Maybe someone from Elecraft can post the temperature crossover points for fans to increase or decrease speed. There is also a dwell feature where you can add delay before fans decrease in speed when cooling down.

I’m happy with fan performance of current firmware.

Dave wo2x

Sent from my iPad

> On Mar 30, 2020, at 12:15 PM, NK6A-Don Minkoff <[hidden email]> wrote:
>
> Has anyone had a problem with the fans not turning on automatically in the KPA1500?
>
> I realized that operating today in WPX that the  temp was reading over 43 c and no fans.  Manually turned them on.  Reloaded firmware and still no fans when getting over 40 deg c.  Ser no. 316. Ver. 2.38.
>
> I'll have to wait for Elecraft support but if anyone else has had this problem I would be interested in the fix.  Temp sensor?
>
> --
> Don Minkoff
> NK6A
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
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[Dick Dievendorff-4]

43 degrees C is below the first turn-on speed for 160 thru 10 meters.

Fan turn-on and turn-off speeds are in the KPA1500 firmware release notes for version 1.87:

⦁ Changed temperatures for fan speeds:
⦁ On 160 thru 10 meters, fans increase speed at 50, 70, 80, 87, and 95 degrees, and slow at 40, 55, 75, 81, and 88 degrees.
⦁ On 6 meters the fans increase speed at 40, 50, 65, 80, and 90 degrees and slow at 35, 41, 51, 66, and 81 degrees.

73 de Dick, K6KR

-----Original Message-----
From: [hidden email] <[hidden email]> On Behalf Of NK6A-Don Minkoff
Sent: Monday, March 30, 2020 09:14
To: Elecraft <[hidden email]>
Subject: [Elecraft] KPA1500 fans not working in auto mode

Has anyone had a problem with the fans not turning on automatically in the KPA1500?

I realized that operating today in WPX that the  temp was reading over
43 c and no fans.  Manually turned them on.  Reloaded firmware and still no fans when getting over 40 deg c.  Ser no. 316. Ver. 2.38.

I'll have to wait for Elecraft support but if anyone else has had this problem I would be interested in the fix.  Temp sensor?

--
Don Minkoff
NK6A

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[kc8wh.mh]

The fans on my KPA 500 kick on at 50C and shut down when the temperature gets to 48 or 49 C. Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------From: NK6A-Don Minkoff <[hidden email]> Date: 3/30/20  12:14 PM  (GMT-05:00) To: Elecraft <[hidden email]> Subject: [Elecraft] KPA1500 fans not working in auto mode Has anyone had a problem with the fans not turning on automatically in the KPA1500?I realized that operating today in WPX that the  temp was reading over 43 c and no fans.  Manually turned them on.  Reloaded firmware and still no fans when getting over 40 deg c.  Ser no. 316. Ver. 2.38.I'll have to wait for Elecraft support but if anyone else has had this problem I would be interested in the fix.  Temp sensor?-- Don MinkoffNK6A______________________________________________________________Elecraft mailing listHome: http://mailman.qth.net/mailman/listinfo/elecraftHelp: http://mailman.qth.net/mmfaq.htmPost: mailto:[hidden email] list hosted by: http://www.qsl.netPlease help support this email list: http://www.qsl.net/donate.htmlMessage delivered to [hidden email]
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