Pump Down; Address Switches - Carrier p3 series Owners And Installation Manual

PUMP DOWN

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.
• Turn the unit on for approximately 3 minutes in cooling mode.

ADDRESS SWITCHES

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 switch is on the back of remote control. and
the other is in the PCB side. Address switch is set as A when you purchase the unit.
Remote control
• Remove the lid of battery case.
• Assign the address switch of one remote control as B.
• Press the RST button with a sharp object.
LR03(AM4)1.5V
LR03(AM4)1.5V
• Close two-way valve all the way.
• Close three-way valve all the way.
Indoor unit
• Turn off the unit and pull out the power plug.
• Remove the insert grille and terminal block cover.
• Assign the address switch of one indoor unit as B.
RST TA
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