1. Refrigerant Recovery: The refrigerant in the air conditioner must be collected into the outdoor unit. Before disassembling the unit, start the air conditioner and set it to cooling mode. Wait for the compressor to run for 5–10 minutes, and once the cooling condition is normal, unscrew the protective caps on the liquid and gas pipe connections of the outdoor unit. Close the shut-off valve on the high-pressure (thin) pipe. After 1 minute, if condensation forms on the outside of the pipe, immediately close the shut-off valve on the low-pressure (thick) pipe. Quickly turn off the machine, unplug the power cord, and use a wrench to tighten the protective cap. At this point, the refrigerant recovery process is complete. You can also use the forced start button on the indoor unit to power on and check whether there are any other issues with the indoor or outdoor units. This helps avoid problems after relocating the air conditioner.
2. Dismantle the indoor unit After recovering the refrigerant, the indoor unit can be dismantled. Use a wrench to unscrew the lock nut connecting the indoor unit, then use a prepared sealing cap to cover and protect the threads of the indoor unit connection to prevent damage during transportation. Next, use a Phillips screwdriver to remove the control wires. At the same time, make marks to avoid incorrect connections during installation. If the signal or power lines are connected incorrectly, it may cause the outdoor unit not to operate or the machine to be uncontrollable. The indoor unit mounting plate is usually fixed quite firmly and can be difficult to remove; after taking it off, place it on a flat concrete surface and gently tap it to flatten and adjust it.
3. After unscrewing the outdoor unit connection lock nut, use the prepared sealing tape to tightly wrap the threads of the outdoor unit connection joint. Then use a wrench to loosen the fixing screws on the base of the outdoor unit. When removing and lowering the outdoor unit, it is best to use a rope to support it. During the unloading process, pay attention to balance to avoid vibration and bumps, and ensure safety. Carefully straighten the connecting pipes of the outdoor air conditioner, and use the four prepared caps to seal the four ends of the connecting pipes to prevent dust and moisture from entering. Once the caps are in place, finally secure them with plastic bags and coil them properly for easy handling.
4. Installation After confirming the positions of the indoor and outdoor units, immediately install the indoor unit mounting plate. Once the outdoor unit and the indoor unit mounting plate are securely installed, straighten the connecting pipes and check for any kinks or dents. Next, inspect the flared ends; if there are any cracks, they need to be re-flared to prevent refrigerant leaks. Finally, check the control wires. Once the pipes, control wires, and drain pipe are all confirmed to be in good condition, bundle them together and seal the pipe connections. When passing through walls, two people should work together from inside and outside the wall to carefully guide the pipes through to avoid damage. Connect the pipes to the indoor and outdoor units and attach the control wires. Next, remove the air from the pipes and the indoor unit. The method is as follows:
(1) Tighten the connected outdoor unit joints (thin) and use a special wrench to loosen the valve stem of the stop valve by about one turn.
(2) When you hear squeaking from the outdoor unit joint (thick) for about 30 seconds, tighten the (thick) joint with a wrench.
(3) Loosen the valve stem on the check valve installed on the (thick) pipe.
(4) Completely loosen the valve stem of the stop valve on the (thin) pipe. At this point, the air conditioner evacuation is complete.
(5) Finally, use a detergent to check for leaks, carefully observing whether any bubbles appear at each joint. After confirming there is no leakage in the system, tighten the valve safety cap, and the unit can be started for trial operation.
(6) If the air conditioner operates normally but the cooling effect is poor and the outlet air temperature of the indoor unit does not meet the requirements, consider adding Freon refrigerant.
(7) After the refrigerant is fully charged, the relocation work is completely finished.
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Post time: Nov-25-2025