If you are looking for a comprehensive guide to understand and install an AC start run capacitor, you have landed on the right page. In this article, we will discuss everything related to a start run capacitor wiring diagram. This includes what a start run capacitor is, its function, types, and how to install it.
What is a Start Run Capacitor?
A start run capacitor is an electrical component that provides an electrical charge to start the motor of an AC unit. It is an essential component that keeps the motor running smoothly, and without it, the motor may not operate or even get damaged. A start run capacitor looks similar to a battery, but it holds an electrical charge temporarily instead of a continuous electric supply.
Types of Start Run Capacitors
There are two primary types of start run capacitors that you can use for an AC unit. These include:
| Start Capacitors | Run Capacitors |
|---|---|
| Used to start the motor | Used to keep the motor running |
| High capacitance but low voltage rating | Low capacitance but high voltage rating |
| Provides a brief burst of energy to start the motor | Provides a continuous supply of energy to keep the motor running |
How to Install a Start Run Capacitor?
Installing a start run capacitor is not much complicated, but you need to follow a few steps to accomplish the task successfully. Below are the steps to install a start run capacitor:
Step 1: Turn Off the Power
Before you start working on the AC unit, make sure that you turn off the power supply. This is to avoid any electrical accident and keep you safe from electric shock. Shut off both the power supply and the circuit breaker to ensure total safety.
Step 2: Find and Identify the Capacitor
Once you turn off the power, locate the capacitor on the AC unit. You can check the user manual or consult an expert in case of difficulty in finding the capacitor.
Step 3: Identify the Wires
After finding the capacitor, identify the wires attached to it. There are mainly three wires attached to the capacitor, i.e., a common wire, a fan wire, and a hermetic wire.
Step 4: Remove the Old Capacitor
Now, remove the old capacitor by detaching the wires from it. Make sure you note down the wire’s position or take a picture to avoid any confusion while connecting the new capacitor.
Step 5: Connect the New Capacitor
After removing the old capacitor, it’s time to install the new one. Follow the wiring diagram and connect the wires accordingly. Make sure you connect the wires correctly; otherwise, it may lead to motor damage.
FAQs
Q1. How do I know if my start run capacitor is bad?
If your AC motor is not starting, or it starts with a humming sound and fails, it is a sign that your start run capacitor is bad. You can also test the capacitor’s voltage using a digital multimeter, and if the reading is below the recommended range, then it’s a sure sign of a bad capacitor.
Q2. What is the difference between run and start capacitors?
Start capacitors are used to provide the initial boost to start the motor, while run capacitors are used to keep the motor running smoothly. Start capacitors have high capacitance but low voltage rating, while run capacitors have low capacitance but high voltage rating.
Q3. Can I replace my start run capacitor myself?
Yes, you can replace your start run capacitor yourself, but make sure you follow all the safety precautions and wiring diagrams correctly. If you are not confident or lack technical knowledge, it is better to consult an expert or a professional technician.
Q4. How much does it cost to replace a start run capacitor?
The cost of replacing a start run capacitor depends on the model and type of capacitor used. On average, a start run capacitor replacement may cost you between $50 to $150.
Q5. Can I use a start capacitor as a run capacitor?
No, you cannot use a start capacitor as a run capacitor. Both capacitors are designed for different purposes, and they have different specifications. Using a start capacitor as a run capacitor may lead to motor damage, and it may also create an electrical hazard.
In conclusion, a start run capacitor is an essential component that helps in the smooth operation of an AC unit. Installing it correctly can save you from future motor damage and also improve the efficiency of your unit.
