Is the compressor very hot? I dont like beginners shooting liquid freon into systems. Find the signal on the wiring diagram that you are missing at the relay and continue to follow it back. A neutral wire is not required for a 3 phase motor. This easy-to-use book covers the following capacitor types: Ceramic, Plastic Film, Aluminum Electrolytic, Tantalum, Glass, Mica, and others. The problem is a bad compressor or fan run capacitor. The relay eliminates starting capacitor from the circuit after starting the compressor. After purging the air out of the hose connect the hose to the new fitting on the low side.
Sometimes I use water from a hose and gently let it run over the compressor to cool it down quickly. The relay and contactors are like any other electric device, it needs both wires to work. Red, and black go to a control box. . The voltage type relay also used in this circuit. Terminal 86 goes hot with the key on. About 90% of the time it is the indoor evaporator coil leaking.
To help you understand this with more detail I have placed additional information to this article which includes links to the motor control section where you will find more information and examples of typical wiring diagrams. Chances are your vehicle uses R-12 refrigerant, you can check by looking at the stickers under the hood. If you do not find the problem that is causing the fuse to blow right away then you will need more than one fuse for testing. If you are in an area of the country where insects are prominent in and around air conditions, then I would suggest you blow your contactor out with compressed air or check and make sure you do not have any insects in between the contactor points at the beginning of each cooling season. You might want to purchase a Super-Boost hard start capacitor. Also, it doesn't specify which way the capacitor should go, so I don't know if it means the wire with the connector which came already on the capacitor goes to S and the other connection which I would have to put on goes to R or vice versa.
Although careful precaution has been taken in the preparation of this website information, we assume no responsibility for omissions or errors. All control devices and load devices are located on the horizontal lines between these outer vertical lines. Most of the time, this will require removing the control unit to test. Note that there may be more than one. First place the rubber thing over the threaded post on the compressor so that the terminals fit through one of the two openings and it is flat on the compressor.
The readings on gauges are in pressure psi. You might have to tape the blower door safety switch, to keep the voltage on so you can perform this test. These are Also the refrigerant Changing from refrigerant R-12 to R-134a If you would like to change the gas from R-12 to R-134 something you can do yourself now that you can buy the little cans again, Read below for help. If you bought a R-134 retrofit kit then you may be confused by the directions on the kit. The potential relay should be mounted with the mounting tab up. The schematic symbols used to represent relays are the same as those for manually operated switches, except that relay symbols often include a solenoid coil.
Please click on the thumbnail below if you would like to read the instructions. The original text of the 1993 compressor diagnosis article had the resistance explanation backwards. It seems weird that if you loose refrigerant you would think that the system would warm up but thats not how it works. This is really fun when it is 90 plus degrees out! I forgot to mark the wires I took off. Getting rid of an old mechanical thermostat will definitely save you in the long run.
The black and blue wires from the 3 phase are connected to the pressure switch and then connected to the motor. You must note that in electrical wiring schematic the position of the switch is shown as it appears when there is no power applied to that circuit. If you look at the inside of the gauge there is a pressure temprature chart printed on the gauges for r-12, r-22, r-502. When we move the manual switch up to the 'Cool' position, 24 volts will flow through the 'Cool' switch, thermal switch, low pressure switch, and high pressure switch, and energize relay C Contactor. It always works in circuit.
There is an Allen screw that can be placed in either the bottom or top of the brass terminal. I along with friends also in the ac trade say they have not had any failures do to the oil breakdown. Good oval Good round capacitor on the right. The transformer has 2 wires coming out with 24 v. A start device matched with an appropriately sized capacitor to cover the range of compressors for the intended application one size does not fit all The use of compressor start devices results from a need to ensure that a compressor usually air conditioning will start under voltage conditions that are less than ideal. All the relays in the system have 24-volt coils. I could not believe it! Pull the outdoor disconnect or indoor breaker that controls the air conditioner.
You would hook up the right color coded wire to use the voltage that you have. Furthermore, you can lower energy bills and energy cost by installing a smart thermostat or a programmable thermostat. Loads are devices that consume power and convert it to some other form of energy, such as motion or heat. This is not advice but the typical straight air conditioner or gas furnace as opposed to a heat pump with electric heat strips could possibly use 12 or 14 gauge copper for the air handler with controls and a fractional horsepower blower. Due to this, it may cause electric faults by short circuit. We do not sell condenser fan motors. Voltage sensing technology that monitors for motor start current sensing devices require internal fuse protection.