Screw size and tightening torque
Power supply terminal
Earth screw
Communication wire connection
1. Insert the communication wires from lower right of the electrical control box and connect them to the
communication terminal blocks.
2. Fix the communication wires with the cord clamp on the right of the terminal block and fix them with the cord
clamp on the sealing material under the electrical control box, and then get the wires through the cutout on the
sealing material to pull them outside the electrical control box. Tear upper and lower of the cutout on the sealing
material with your hands before getting the wires through the cutout.
Screw size and tightening torque
Communication wire terminal
153-EN
IM_1141001201-2_Book.indd 77
IM_1141001201-2_Book.indd 77
Tightening torque
Screw size
(N•m)
M6
2.5 to 3.0
M8
5.5 to 6.6
Uc: Communication wiring between outdoor units
Uh: Central control device
SHIELD: Shield wire
Uv: Communication wiring between Indoor unit
Tightening torque
Screw size
(N•m)
M4
1.2 to 1.4
– 77 –
9
Address setting
On this unit, it is required to set the addresses of the indoor units before starting air conditioning.
Set the addresses following the steps below.
CAUTION
• Be sure to complete the electric wiring before setting the addresses.
• If you turn on the outdoor unit before turning on the indoor units, the CODE No. [E19] is indicated on the
7 - segment display on the interface P.C. board of the outdoor unit until the indoor units are turned on. This is not
a malfunction.
• It may take up to ten minutes (normally about five minutes) to address one refrigerant line automatically.
• Settings on the outdoor unit are required for automatic addressing. (Address setting is not started simply by
turning on the power.)
• Running the unit is not required for address setting.
Before setting the address, set the DIP-SW on the header outdoor unit interface P.C. board.
1. Follow the steps below to open the electrical control box cover
(1). Loosen the screws on the left and right side of the electrical control box cover.
(2). Remove the screw A for MMY-MUP220 and MUP240.
(There is no screw A for MMY-MUP080, MUP100, MUP120, MUP140, MUP160, MUP180 and MUP200)
(3). Hold the lower side of the electrical control box cover to draw it toward you while lifting it up, and remove the
electrical control box cover.
Screw A
154-EN
5/2/2564 BE 16:27
5/2/2564 BE 16:27