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HP TO HIGH IN REVERSE CYCLE

Faulty hp pressure switch(off:33kgf/cm on:24/kgf/cm)replaced with danfoss hp-auto pres/switch.Refrigerant R22

In cooling cycle, hp1500kpa lp380kpa
On Heating, hp to high 3000kpa.Pype size 3/4 &1/2 inch.

Indoor unit: fan-HI
Outdoor unit: condensor fans cut in and out

Why hp to high in reverse cycle?

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  • Coenie May 27, 2008

    LG CASSETTE SPLIT

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If the refrigerant charge was improperly adjusted at any time you may have the indications of an overcharge in your system causing the high pressure to trip out. The name plate on these indicates the proper charge and it is critical to the ounce.

Posted on May 27, 2008

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My ac unit out side has power but does not turn on ... Why?


Hi!!

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There should be a Schrader valve on the fuel rail (looks like a valve stem on a tire, it is metal).

You need to connect a fuel pressure gauge to that valve and do the following test:

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I entered questions for the split Goodman HVAC system yesterday. Two people responded. In response to taa43-Tom, I will get more local opinions & quotes tomorrow. Do you live in the Southeast? ...


Better off taking good money and put into something with a warranty. its probably a 4 hour job to recover solder in new valve change drier pull vacuum recharge If your system is freezing up it may not be the valve could be a check valve. low freon dirty unit all would cause the unit to freeze up is the company competent in working on heat pumps don't get some body that can work on you want in FIXED . from what you said in your 2nd post i am not convinced its the valve. Tom p.s i am in the mid west prices are not too far out of line.

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The high side/low side pressure equalization you describe is normal for a compressor sitting idle.

If you have an ohm meter you can check the compressor windings for opens and shorts. If your compressor is 3 phase as you state (this would be very unusual for a residential unit) you should have continuity across all 3 phases and no continuity to ground. Take the compressor out of the circuit before you check.

If the compressor does have crankcase heat, it should have been left on for at least 24 hours before starting the unit. Another cause for failure could be overcharging which could have resulted in refrigerant slugging back to the compressor.

Does the unit have any low or high pressure control safeties? If so, check them too - some have resets. You said the condenser fan ran so it's not likely the breaker blew, but check anyway and also check to make sure you have available power on all 3 phases.

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