The AC fan capacitor is an essential component of an air conditioning system that helps to start the motor and keep it running smoothly. Understanding how to wire the AC fan capacitor is crucial for proper functioning of the AC unit. In this article, we will discuss the wiring diagram of an AC fan capacitor in detail.
What is an AC Fan Capacitor?
The AC fan capacitor is a small cylindrical device that stores electrical energy and releases it when needed to start up the motor. It is usually located inside the AC unit near the motor. The AC fan capacitor has two terminals that are labeled as “HERM” and “FAN”. These terminals are used to connect the capacitor to the motor and the power supply.
Types of AC Fan Capacitors
There are two types of AC fan capacitors – start capacitor and run capacitor. A start capacitor is used to provide an extra boost of power to start up the motor while a run capacitor is used to keep the motor running smoothly. It is important to choose the correct type of capacitor for your AC unit as using the wrong one can damage the motor and cause other problems.
Wiring Diagram of AC Fan Capacitor
The wiring diagram of an AC fan capacitor consists of three wires – HERM terminal, FAN terminal, and common terminal. The HERM terminal is used to connect the capacitor to the compressor motor, while the FAN terminal is used to connect it to the fan motor. The common terminal is used to connect the capacitor to the power supply.
How to Wire an AC Fan Capacitor?
Now that we know what an AC fan capacitor is and what its wiring diagram looks like, let’s take a look at how to wire it properly. Follow the steps below:
Step 1 – Turn Off Power Supply
Before starting any electrical work, make sure to turn off the power supply to the AC unit to prevent electrocution and other accidents. Locate the main circuit breaker of the AC unit and turn it off.
Step 2 – Remove Cover
Remove the cover of the AC unit to access the capacitor. The capacitor is usually located near the motor.
Step 3 – Disconnect Old Capacitor
Disconnect the old capacitor by removing the wires attached to it. Make note of which wire is connected to which terminal for later reference.
Step 4 – Connect New Capacitor
Connect the new capacitor to the motor and power supply by connecting the wires to the correct terminals as per the wiring diagram. Make sure to tighten the wire connectors properly to avoid any loose connections.
Step 5 – Test the Unit
After wiring the new capacitor, replace the cover of the AC unit and turn on the power supply. Test the AC unit to ensure it is functioning properly. If there are any issues, revisit the wiring to ensure everything is connected properly.
FAQs
Q1. Why is the AC fan capacitor important?
A1. The AC fan capacitor is important as it helps to start up the motor and keep it running smoothly. It stores electrical energy and releases it when needed to provide an extra boost to start up the motor.
Q2. What happens if the AC fan capacitor is faulty?
A2. If the AC fan capacitor is faulty, it can lead to various issues such as the motor not starting up, the motor making a humming noise or running slowly, and the AC unit not cooling properly. It is important to get it replaced as soon as possible.
Q3. Can I replace the AC fan capacitor myself?
A3. Yes, you can replace the AC fan capacitor yourself. However, it is important to follow the proper safety precautions and ensure the wiring is done correctly to avoid any accidents or damage to the AC unit.
Q4. How do I know which type of capacitor to use for my AC unit?
A4. You can refer to the user manual of your AC unit or consult with a professional to determine which type of capacitor is suitable for your AC unit.
| Terminal | Description |
|---|---|
| HERM | Used to connect capacitor to compressor motor |
| FAN | Used to connect capacitor to fan motor |
| Common | Used to connect capacitor to power supply |
