

The Daikin Outdoor Heat Pump RX18RMVJU is a high-efficiency HVAC solution designed for residential and commercial applications. This model offers reliable heating and cooling performance, ensuring optimal comfort while minimizing energy consumption. Ideal for various climates, it features advanced technology for enhanced durability and efficiency.
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Tensioning Guide
Belt-diagram
C-120 pulleys
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Daily Electrical System Inspection
Replace Roller and Pulley
Install Engine B-120
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Motion Industries
Applied Industrial Technologies
Electrical Brothers
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Drive Motor
B2 Rollers
Tensioning System
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Daikin Outdoor Heat Pump RX18RMVJU
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Outer Panel Removal
Warning: Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work.
Remove the 6 screws and remove the top panel.
Remove the 8 screws of the front panel.
Slide the fan motor fixing frame to the left and unfasten the 2 hooks.
Unfasten the 2 hooks on the right side.
Remove the front panel.
Remove the 4 screws of the discharge grille.
Unfasten the 2 hooks and remove the discharge grille.
Sign off on the outer panel removal
Electronic Expansion Valve / Four Way Valve Removal
Warning: Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work.
Be careful not to get yourself burnt with the pipes and other parts that are heated by the gas brazing machine.
If the refrigerant gas leaks during work, ventilate the room. (If the refrigerant gas is exposed to flames, toxic gas may be generated.)
Caution: From the viewpoint of global environment protection, do not discharge the refrigerant gas in the atmosphere. Make sure to collect all the refrigerant gas.
Cautions for restoration: 1. Restore the piping by non-oxidation brazing. 2. It is required to prevent the carbonization of the oil inside the four way valve and the deterioration of the gaskets affected by heat. (Keep below 120°C (248°F).) For the sake of this, wrap the four way valve with wet cloth and provide water so that the cloth does not dry.
Note Before working, make sure that the refrigerant gas is empty in the circuit.
Be sure to apply nitrogen replacement when heating up the brazed part.
Do not use a metal saw for cutting pipes by all means because the sawdust comes into the circuit.
When withdrawing the pipes, be careful not to pinch them firmly with pliers. The pipes may get deformed.
Compressor Removal
Warning: Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work.
Warning: Be careful not to get yourself burnt with the pipes and other parts that are heated by the gas brazing machine.
Warning: If the refrigerant gas leaks during work, ventilate the room. (If the refrigerant gas is exposed to flames, toxic gas may be generated.)
Warning: Since it may happen that the refrigerant oil in the compressor catches fire, prepare wet cloth so as to extinguish fire immediately.
Caution: From the viewpoint of global environment protection, do not discharge the refrigerant gas in the atmosphere. Make sure to collect all the refrigerant gas.
Caution: Restore the piping by non-oxidation brazing.
Note: Before working, make sure that the refrigerant gas is empty in the circuit.
Note: Be sure to apply nitrogen replacement when heating up the brazed part.
Note: Do not use a metal saw for cutting pipes by all means because the sawdust comes into the circuit.
Sound Blanket Removal
Warning: Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work.
Sound blanket (back) removed carefully to avoid tearing the piping ports
Sound blanket (top) removed
Sound blanket (outer) opened and pulled up
Sound blanket (inner) removed
When reassembling, fit the sound blankets in the following order.
Select the sound blanket fitted first
Select the sound blanket fitted second
Select the sound blanket fitted third
Outdoor Fan / Fan Motor Removal
Warning: Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work.
Remove the drip proof cover
Remove the 2 screws of the terminal cover
Open the terminal cover and pull down to unfasten the 2 hooks
Remove the terminal cover
Disconnect the connector [S70]
Pull out the clamp of the fan motor lead wire (on the outer side of the electrical box)
Release the fan motor lead wire from the groove and unfasten the 2 hooks
Remove the nut and remove the outdoor fan
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