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Posted by Bubba on December 12, 2007, 7:47 am
wrote:
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>> Most compressor have an overload trip built inside. But that would not
>> prevent the fan from running.
>> A 24vac signal powers a big relay that typically turns on both the fan and
>> the compressor. Both have starter capacitors or share one of those dual
>> starter capacitors. The compressor is 230 and the fan is usually 115.
>WTF?????
Yeah, I liked that too. :-)
A "big relay" and the "fan is usually 115". James is a genius.
Bubba
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>> There is also a reversing valve in the freon line that controls if it is
>> in ac mode or heat mode.
>> Plus there is usually a circuit board that periodically puts the unit into
>> defrost mode which is basically turning it back into an ac for a couple
>> minutes but without the fan. This heats up the outside coils pretty fast
>> and melts any accumulated ice. It could be sensor controlled but most are
>> just timer circuits.
>>> Hi,
>>> The heat pump in my apartment is not working.
>>> At the outside unit I can hear a slight hum and then it clicks then goes
>>> quiet. It seems that a circuit breaker in the unit is tripping.
>>> It doesn't appear/sound like the compressor is running and the fan isn't
>>> running.
>>> Would a frozen compressor keep the fan from running?
>>> I set it on cooling and it still didn't run.
>>> Any suggestions?
>>> Thanks
>>> Dave
>>
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> I don't think that I would kill myself. I'm a licensed in the auto world
> for Freon, I'm also a licensed A&P (aircraft mechanic) and an electrical
> engineer.