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Author Topic: Johnson Controls A419 Problem  (Read 2190 times)

CREW1

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Johnson Controls A419 Problem
« on: February 04, 2013, 05:25:10 PM »
I set my JC A419 set point to 179f i set the dif to 15 the asd to 1 the OFS to 0 and the SF to 1

It was functioning fine for a full day....fan kicked on around 164f and kicked off around 178f

A little while ago it ran a normal cycle and started to cool....at 172f the blower fired ????

Wondering if anyone knows why? Possibly a defective unit?

Thanks
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Scott7m

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Re: Johnson Controls A419 Problem
« Reply #1 on: February 04, 2013, 06:25:46 PM »
I am not familiar with them, but p and m uses those controls, maybe someone can chime in
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ghitch75

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Re: Johnson Controls A419 Problem
« Reply #2 on: February 11, 2013, 08:37:22 AM »
i use them all the time....is it new?...i always set the ASD,OFS and SF to 0....
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