Removing the fan blade on a Mitsubishi mini split can be a delicate task, but with the right tools and a step-by-step approach, you can easily accomplish this maintenance task. This comprehensive guide will walk you through the process, providing detailed instructions and expert-level insights to ensure a successful fan blade removal.
Preparing for the Task
Before you begin, it’s crucial to ensure that the power to the unit is turned off at the circuit breaker or disconnect box. This safety precaution will prevent any accidental electrical shocks or damage to the unit.
Next, you’ll need to gather the necessary tools:
– Screwdriver set (both flathead and Phillips head)
– Allen wrench set
– Pliers
– Hammer (if needed)
Accessing the Fan Blade
Image source: Mitsubishi ac By Dinkun Chen
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Remove the Front Cover: Begin by unscrewing the screws located at the bottom of the unit to detach the front cover. This will provide you with direct access to the internal components.
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Lower the Drain Pan: The drain pan is typically held in place by tabs. Carefully lower the drain pan to gain better access to the blower wheel and its surrounding parts.
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Locate the Set Screw: On the far right side of the blower wheel, you’ll find a set screw. Use a screwdriver or Allen wrench to loosen this screw, as it secures the blower wheel to the motor shaft.
Removing the Blower Wheel
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Remove the Evaporator Coil Screws: There are three screws on the left side of the evaporator coil. Remove these screws to allow the coil to be lifted out towards you.
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Extract the Blower Wheel: With the evaporator coil removed, you can now safely grab the blower wheel and pull it out. Be cautious not to lose the bearing located on the left side of the blower wheel.
Advanced Techniques
For a more efficient and thorough removal process, consider the following advanced techniques:
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Use a Long Screwdriver or Allen Key: Insert a long screwdriver or Allen key through the cutout in the blower wheel to unscrew the set screw from the hub. This can provide better leverage and access.
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Bend the Evaporator Coil: Gently bend the evaporator coil slightly upwards, which will allow you to slide it out from the left side of the unit.
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Utilize a Hammer: If the drain pan is held in place by a pressure fit, you may need to use a hammer (or a BFH – Big Freaking Hammer) to carefully remove it.
Cleaning and Reassembly
When cleaning the blower wheel, it’s best to avoid using harsh chemicals and instead stick to water-based cleaning methods. This will help preserve the integrity of the components.
To reassemble the unit, simply reverse the steps you took to remove the blower wheel. Ensure that all screws are tightened securely, and the drain pan is properly reinstalled.
Conclusion
Removing the fan blade on a Mitsubishi mini split may seem daunting, but with the right tools and a methodical approach, it can be a straightforward task. By following the detailed instructions and incorporating the advanced techniques outlined in this guide, you can successfully complete this maintenance procedure and keep your mini split unit running efficiently.
Remember to always prioritize safety, work carefully, and refer to the manufacturer’s instructions if you encounter any uncertainties. With this comprehensive guide, you’ll be well on your way to becoming a mini split fan blade removal expert.