47
English
Installation Procedure
Basic segment display
CAUTION
• Open the gas side and liquid side service valve completely
after charging the refrigerant. (If you operate the air
conditioner with the service valve closed, the important parts
may be damaged.)
• Put on safety equipment when charging refrigerant.
• Do not charge the refrigerant when you adjust or control other
product such as indoor units or EEV kits.
• If you charge the refrigerant with the front cabinet open, be
very careful with the fan on the top of the product to prevent
personal injury.
• When the ambient temperature is low in winter time, do
not heat the refrigerant container to speed up the charging
process. There is risk of explosion.
• Beware for possibility of refrigerant leakage when you connect
the manifold gauge to the charging port for heating.
• Close the valve of the refrigerant container immediately after
charging the refrigerant. If not, there might be a change in
entire amount of refrigerant.
Using service valve for gas
• After charging the refrigerant, close all caps as shown in the
illustration.
• Tightening torque for the cap of refrigerant charging port
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• Tightening torque for the cap of control part
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• Opening/closing torque for the valve
– Ø19.05mm (Ø3/4inch) : 10 N·m (7.4 lbf·ft)
Cap for the control part
Cap for the refrigerant
charging port
Step Display content Display
At initial power input Checking segment display
SEG 1 SEG 2 SEG 3 SEG 4
“8” “8” “8” “8”
While setting communication between
indoor and outdoor unit (Addressing)
Number of connected indoor units
SEG 1 SEG 2 SEG 3 SEG 4
“A” “d”
Number of communicated
units
Refer to "View Mode" for
communication address
After communication setting
(usual occasion)
MCU, Indoor unit address
SEG 1 SEG 2 SEG 3 SEG 4
I/U: “A”
MCU: “C”
I/U: “0”
MCU: “1”
Reception address (in decimal
number)
࢜ I/U : Indoor unit
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