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21-EN
22-EN
Check the draining
In the test run, check that water drain is properly performed and water does not leak from the connecting part of
the pipes. When doing this, also check that no abnormal sounds are heard from the drain pump motor. Check
draining also when installed in heating period.
When the electrical and wiring work has been completed
Pour some water by following the method shown in the following figure. Then, while performing a cooling operation,
check that the water drains from the drain pipe connecting port (transparent) and that no water is leaking from the
drain pipe.
When the electrical and wiring work has not been completed
• Disconnect the float switch connector (3P: red) from the connector (CN34: red) on the printed circuit board inside
the electrical control box. (Before doing this, the power must be turned off.)
• Connect a 208 V to 240 V supply voltage to (L) and (N) on the power supply terminal block. (Do not apply a 208
V to 240 V voltage to (A), (B), (U
1
), (U
2
) of the terminal block. Otherwise, the printed circuit board may be
damaged.)
• Pour the water by following the method shown in the following figure. (Amount of water poured: 1500 cc to 2000
cc)
• When the power is turned on, the drain pump automatically starts running. Check whether the water is draining
from the drain pipe connecting port, and check that no water is leaking from the drain pipe.
• After checking that the water drains and there are no water leaks, turn off the power, connect the float switch
connector to its original location (CN34) on the printed circuit board, and return the electrical control box to its
original position.
Supply water hose
Pull out connector CN34
(Red) from P.C. board.
White
Red
Black
Black
208 V to 230 V: 60 Hz
220 V to 240 V: 50 Hz
Access panel
Heat insulating process
• As shown in the figure, cover the flexible hose and hose band with the attached heat insulator up to the bottom
of the indoor unit tightly.
• Cover the drain pipe tightly with a heat insulator procured locally so that it overlaps with the attached heat
insulator of the drain connecting section.
Connecting method of the duct
CAUTION
Incomplete heat insulation of the supply air flange and sealing may occur dewing resulted in falling of water drop.
Wrap the attached heat insulator tightly from
the surface of the indoor unit.
Heat insulator of the drain
connecting section
(accessory)
In
doo
r un
it
Heat insulator
(locally procured)
Flange (locally procured)
Aluminum tape (locally procured)
Aluminum tape (locally procured)
Under surface
Air discharge side
Indoor unit
Air intake side
Connect a duct to the
outside of the flange
Duct: Insulation material
(locally procured)
Flange
