Gravitational drainage
1
Reattach the drain cap.
2
Insert flexible drain hose into lower drain pipe and
fix it with hose band.
3
Remove drain pump connector CN504.
Upper pipe
Lower pipe
Move the drain cap from
the lower pipe to the
upper pipe.
CN504
Red
Black
Drain up
When a down-gradient cannot be secured for the drain pipe, drain-up
piping is possible.
• The height of the drain pipe must be 33.5" (850 mm) or less from the
underside of the indoor unit.
• Take the drain pipe out of the drain pipe joint with the indoor unit in
11.8" (300 mm) or less, and bend up the pipe vertically.
• Immediately after the pipe is bent up vertically, lay the pipe making a
down-gradient.
For drain pipes that will be
connected after setup, make
a downward slope of 1/100
or more.
Drain up setup dimensions
Flexible drain hose
(supplied)
11.8” (300)
or less
33.5" (850)
or less
24.3" (618)
or less
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
• To ensure the power has been turned off.
• Disconnect the float switch connector (3P: red) from the connector (CN34: red) on the printed circuit board inside
the electrical control box.
• Connect a 208/230V supply voltage to (L) and (N) on the power supply terminal block.
(Do not apply a 208/230V voltage to (U1), (U2), (A), (B) 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: 1.5L to 2L (1/3 to 0.5 gallon)
• 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.
208/230V~60 Hz
Pull out connector CN34
(Red) from P.C. board.
Black
Black
Red
White
Supply water hose
Access panel
– 12 –
EN
23-EN
24-EN
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