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Pump down means collecting all the refrigerant in the system back into the outdoor unit without losing any refrigerant gas.
Pump down is used when the unit is moved or for servicing the refrigerant circuit.
• Close three-way valve halfway. • Close two-way valve all the way.
• Turn the unit on for approximately 3 minutes in cooling mode. • Close three-way valve all the way.
If you are installing two indoor units in the same room, it is necessary for you to assign each unit its own address
so each can be operated by its own remote control. One address selector is in the PCB side and the other is
configured by remote controller. The address selector is set to A when you purchase the unit.
PUMP DOWN
• Refer the “remote control configuration” at page. 9
• Turn off the unit and pull out the power plug.
• Remove the insert grille and terminal block cover.
• Assign the address selector of one indoor unit as B.
Indoor unit
Remote control
ADDRESS SWITCHES