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ok..in my experience there is not one only reason why this happen...
1st. if this air con have repair before or install a new compressor and the supply power is 3phase the reason why this happen is improper wiring.
2nd. what type of aircon? window type or split unit or centralize?
3rd. if the unit is split type.. there is a type of splite type dont have a filter drier.. that's why the discharge line make it cool.. there is many reason why this happen in air con..
ok i just share my knowledge.. im mark angelo manuel.. from philippince..
You need to check the freon level first because it low............
What else can I help you with?
Does low suction pressure have an effect on reciprocating compressors?
At very low suction pressure, the suction valves of reciprocating compressor will not work and there will be no gas in the cylinder during compression stroke, resulting some damage to the suction valves. If low suction pressure trip protection is not provided there can be some abnormal damage.
How is work quench valve in reefer?
A refrigeration circuit is provided with a quench line connecting the liquid line and the suction line and containing a QEV. The QEV is controlled responsive to the superheat of the refrigerant supplied to the compressor. By injecting liquid refrigerant downstream of the suction modulation valve and the sensor for the TXV, the system can be operated at low capacity without overheating the compressor oil.
Where is the only permanent suction line in a heat pump?
The only permanent suction line in a heat pump is located between the evaporator and the compressor. This line carries the low-pressure refrigerant vapor from the evaporator, where it absorbs heat, to the compressor, where it is compressed into a high-pressure gas. This continuous flow is essential for the heat pump's operation, allowing it to transfer heat efficiently from one location to another.
What causes heating in Bitzer compressor?
Heating in a Bitzer compressor can be caused by several factors, including inadequate lubrication, excessive refrigerant flow, or a malfunctioning valve. High discharge pressure or low suction pressure can also lead to overheating. Additionally, accumulation of dirt and debris can obstruct airflow and reduce cooling efficiency, resulting in increased temperatures. Regular maintenance and monitoring of operating conditions are essential to prevent overheating.
How does pump-down works in refrigeration?
When the call for cooling is satisfied, a solenoid valve closes, stopping the flow of refrigerant into the metering device. A pressure switch that controls the compressor will keep the compressor running until the pressure in the suction line reaches a low pressure. Usually this is just above 0 psig. When a call for cooling opens the solenoid valve, the pressure in the suction line starts to rise. When it reaches the set-point of the pressure switch, the compressor will start again. As a reminder. only trained and qualified personnel should work on refrigeration systems. There are many things that can be dangerous or possibly lethal while working on refrigerant systems.
Is the suction line the high side?
No, the liquid (discharge) line is the high pressure side. The suction line is the low pressure side.
What is an ac discharge and suction lines?
AC discharge and suction lines are components of an air conditioning system. The discharge line carries high-pressure refrigerant gas from the compressor to the condenser, where it releases heat and condenses into a liquid. In contrast, the suction line transports low-pressure refrigerant gas from the evaporator back to the compressor, where it is compressed and cycled again. Proper insulation and maintenance of these lines are crucial for efficient system performance.
Could low refrigerant cause the suction line not to be cool or sweating?
Yes, low refrigerant levels can cause the suction line to not be cool or sweating. When refrigerant is insufficient, the cooling process is compromised, leading to less heat absorption and inadequate cooling of the suction line. This can result in reduced efficiency and potentially cause the system to malfunction if not addressed. Regular maintenance and monitoring of refrigerant levels are essential to ensure optimal performance.
What effects appear if you reduce the diameter of impeller?
Suction head will decrease Delivery head will decrease. Discharge will increase at low suction and delivery head. discharge stagnate at low head than rated head.
What causes your home AC compressor to keep getting too hot and quit cooling?
Defective pressure switch not cutting out on hi-head pressure The compressor depends on the suction line for coolong the motor, if its low on freon then the suction line will not be cool enough to cool motor windings.
Where is the low pressure for the AC to refill freon?
on the large ref line (suction line)
Which port on AC compressor is low pressure 1999 Chevy blazer?
They may be marked "S" and "D" for suction (low side) and discharge (high side). A simpler way would be to look at the lines going into and out of the AC.... the smaller line will be the high pressure line, while the larger line will be the low pressure line. The low pressure line will connect at the compressor inlet, and the high pressure line will connect at the compressor outlet.
What would cause an air conditioner to have low suction and high discharge?
Low suction and high discharge in an air conditioner can be caused by several factors, including low refrigerant levels due to leaks, a clogged air filter restricting airflow, or an issue with the compressor itself. Additionally, a malfunctioning expansion valve can lead to improper refrigerant flow, exacerbating the problem. These conditions can hinder the system's ability to cool effectively and may require professional diagnosis and repair.
What is a suction line on an Air Conditioner?
The suction line connects the evaporator outlet and the compressor intlet. Low pressure refrigerator vapour is drawn from the evaporator to the compressor through this line.
How do you know if you have a leak in the central air unit?
The system will not cool if it is low on refrigerant. Check the suction line and see if it feels cold and is sweating. The suction line is the larger of the 2 and is covered in black insulation. If it is not sweating or if it is warm to the touch, you are probably low on refrigerant. If you have to have refrigerant added more than once, it's a sure bet there is a leak in the system.j3h.
Where is the only true discharge line on a heat pump?
The only true discharge line on a heat pump is located on the compressor. This line carries the high-pressure refrigerant gas that has been compressed by the compressor and is then directed towards the condenser. It's important to distinguish this from the suction line, which carries the low-pressure refrigerant back to the compressor. Proper identification of these lines is crucial for maintenance and troubleshooting.
What should the low pressure be for a 404a refrigerant on a freezer?
18-20psig suction 250-270 psig discharge In freezers pressures are ok .I got it ,but the mention pressure of suction 18-20 discharge 250-270 at what temprature in centegrade it should be.
