How to Lubricate Motor on Fujitsu Inverter: A Comprehensive Guide

Maintaining the motor on your Fujitsu inverter is crucial for ensuring optimal performance and longevity of your air conditioning system. This comprehensive guide will walk you through the step-by-step process of lubricating the motor, providing you with the technical expertise and hands-on approach to keep your Fujitsu inverter running smoothly.

Preparing for Lubrication

Before you begin the lubrication process, it’s essential to ensure that the power to the air conditioning unit is turned off. This can be done by locating the circuit breaker or fuse box and switching off the power supply to the unit. Failing to do so can result in serious safety hazards and potential damage to the equipment.

Next, you’ll need to remove the cover of the indoor unit to expose the blower wheel and motor. This is typically done by unscrewing or unclipping the cover, which is usually held in place by screws or clips. Be sure to handle the cover carefully to avoid any damage.

Locating the Motor

how to lubricate motor on Fujitsu inverterImage source: Fujitsu AC by Dinkun Chen

The motor on a Fujitsu inverter is typically located near the blower wheel, either as a separate component or integrated into the blower assembly. Carefully inspect the area to identify the motor’s location, as this will be crucial for the next steps.

Identifying Lubrication Points

The motor on a Fujitsu inverter may have one or more lubrication points, which are usually located at the ends of the motor shaft. These points are typically marked with a small lubrication fitting or a grease zerk, making them easily identifiable.

Applying Lubricant

Once you’ve located the lubrication points, it’s time to apply the lubricant. Use a high-quality, high-temperature grease and a grease gun or a syringe to apply a small amount of the lubricant to each lubrication point. Be cautious not to overfill the grease fittings, as this can lead to damage to the motor.

When applying the lubricant, it’s essential to follow the manufacturer’s recommendations regarding the type and amount of grease to be used. Consult the Fujitsu inverter’s owner’s manual or contact the manufacturer for specific instructions.

Reassembling the Unit

After lubricating the motor, it’s time to reassemble the indoor unit. Carefully replace the cover, ensuring that it is securely fastened in place. This step is crucial to maintain the proper airflow and prevent any potential issues with the air conditioning system.

Restoring Power and Testing

Once the unit is reassembled, turn the power back on at the circuit breaker or fuse box. Then, test the air conditioning system to ensure that it is operating correctly. Monitor the system for any unusual noises, vibrations, or performance issues, and address them promptly if they arise.

Maintenance Considerations

It’s important to note that not all motors can be lubricated, and some may require professional service. Always consult the owner’s manual or contact the manufacturer for specific instructions before attempting to lubricate the motor.

Regular maintenance, including periodic lubrication, is essential for the longevity and optimal performance of your Fujitsu inverter. By following the steps outlined in this guide, you can ensure that your air conditioning system continues to operate efficiently and effectively.


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