Replaced compressor in 5 ton ac unit. ck for leaks with nitrogen. ran a deep vacum . added freon r 22 to 50 psi pressure before starting. unit ran for about 1/2 hour then stop . Kick out in overload. never fully equalized totally.
thought there might be restricktion in system , ck piston its ok, ck filter in unit its ok . took off high side line set left suction side and ck with nitrogen.
could it be the new replacement compressor bad.
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Re: 5 ton goodman ac unit
You MUST WEIGH IN THE NEW CHARGE OF R-22. There should be a label on the side of the a/c unit that states what the factory charge was. This is only a starting point. Once you have the factory charge in the system, then turn on the unit and allow it to stabilize (5 min) . Check pressure on low side and check teperature on low side pipe. Temperature of pipe should be 8 to 15 degrees above what the boiling point of the refrigerant is for the current pressure you are reading. If the temperature is more than 15 degrees, add R-22 in 4oz increments allowing 5min in between each time you add until you are in the "zone". When you do this, your head pressure needs to be 225-250. if you need to cover the coil or block the outdoor fan to do this then do it. Hook up the vacuum pump and start over
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it is a 3 ton condensor you still can buy r22 freon condensors new but they have nitrogen charge and its expensive to charge I recommend to go with 3 ton goodman condensor which is new 410a puron and also change indoor coil and flush the line set so you dont endure the high cost of new copper lines these new systems come with 10 years warranty and the r22 systems come with only five years
There should be a name plate with the model and serial # which will tell you what the factory charge is for the unit plus 15 to 25 feet of line set. If you weight in the charge you should be pretty close...... In AC mode you should run around 125# suction and about 265 head pressure with 70 degree ambient F. If you have the right charge in the heat pump and you are still running 25# suction pressure in the Air Condition mode then you have a restriction filter drier or TXV locking up..... Did you replace the filter drier when you fixed the leak was the leak on the suction side if so then you definitely need to change the filter drier.
Gas leak in your system. Don't run the unit further as it will pump the oil from compressor. Find leak by pressuring nitrogen up to 300 psi.And with soap solution you can find leak. Even with leak detector you can find.
After finding out the leak arrest with brazing and then recheck for pressure hold up. Vacumise and then do gas charging. Please call repairman to do professional job.
Hello Scott,Your new ac is OVERCHARGED with freon.Shut it off,let it cool down and recover/remove freon.The compressor has an internal pressure valve that makes the (hiss).It will stop when the charge is adjusted.Call them back to do it.
condenser fan won't come on. solution check the capacitor if good ohm out the fan to see if it is bad. If bad replace fan motor with new one.
2. compressor will not come on. solution check the contactor to see if engaging this applies to problem 1 also. If engages check the capacitor on the herm side if it is bad replace. If good check compressor to see if the compressor is bad. Should it be bad replace compressor.
3. High head pressure not cooling properly dirty condenser coils. Clean coils. With hose and water.
4. Low head pressure frosting accruing on suction line. Check freon levels. Also check inside air filter for being dirty.
5. Condenser unit is failing to come on. solution check the power source check the contactor should the main power be bad check main breaker and replace any slow blow fuses that are bad. Should the contactor be bad check transformer to ensure 24 volts going to secondary side on contactor. Inspect the two wire going to outside unit condenser. replace any broken wire any bad transformer or bad contactor.
depends on where you live there are supply houses that carry goodman products the motor is a 3 1/2 ton unit or bring the motor to motor shop they can cross reference that number to another motor that would work fine
You have a restriction in the system. Probably in the TXV or orifice in the A/H. The burn out sent trash/fragments through the system. I would open the sytem and blow nitrogen through, then pull a deep vacuum. You may need to install a low side filter/drier. When you open the system change out the high side drier again for sure.
The things that can cause this problem are lack of or poor airflow over the Evaporator coil. Or a low system charge. Or quite possibly a restriction in the line on the low side. When they replaced the compressor did they purge the line set with nitrogen and pull a deep vaccum? This is imperative when replacing a condensing unit to ensure that no residual particles are left in the line set to create a restriction.