Heat Pump Troubleshooting
Heat pumps are very important appliances when it comes to maintaining a healthy as well as hearty atmosphere in your residential or commercial premises. But for them to work properly, you need to know the troubleshooting tips that can help you to diagnose problems with them when they malfunction. Before you start troubleshooting the heat pump, it is important that you first of all turn off the power supply at the main circuit breaker. Some of the problems that you will notice in a malfunctioning heat pump include insufficient heat production or no heat production at all, low as well as high head pressure, noisy heating equipment or the heat pump freezing.
Insufficient heat production in a heat pump is usually caused by obstructions in the air ducts. It may also be caused by low thermostat setting as well as presence of dirt in the air filters, so you will need to check those problems and rectify them. If you notice low and high head pressure in the heat pump, it will probably be because of a faulty blower or accumulation of dirt and dust in the evaporators and filters. To fix this problem, you will need to look up the defrosting option in the unit. If it is available, use it to defrost the system and also check the compressor for any issues. Also check the calibration of the thermostat.
During troubleshooting of the heat pump, you may notice bad compressor suction as well as discharge valves. In such a case, you will need to get gauge manifold hoses and then connect them to the connection port on every valve. Make sure that the suction as well as discharge valves are open, and then close the suction valve only while ensuring that the compressor is on. For a bad discharge valve, you will need to make sure that the suction valve is closed and then start the compressor. Pump the compressor in the deepest of the valve as possible.
Another problem with the heat pump could be liquid slugging. You can resolve this problem before the compressor goes bad. When the compressor receives liquid slug, you will hear because it will have a sound such as that of metal against metal clattering. You can separate the liquid by either refrigerant slugging or oil slugging. Refrigerant slugging is where you install a suction accumulator in the suction line that leads to the compressor or heat the trace areas that could be trapping liquid during off periods. Oil slugging on the other hand involves evacuating the entire refrigerant out of the system and also getting rid of oil from the compressor.
Overtime, the compressor bearings can become worn out. It is therefore important to also check them out when you are troubleshooting the system to avoid a case of poor refrigerant performance. The bearings can also be worn out if the compressor is not getting enough lubrication. There are some cases when you might need to replace the entire compressor, while in some cases you may need you to rebuild it.