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Gravitational drainage
1
Reattach the drain cap.
* For gravitational drainage, remove the white connector
(CN504) on the upper left of the circuit board in the
electrical control box.
2
Insert fl exible drain hose into lower drain pipe and
fi x it with hose band.
3
Remove drain pump connector CN504.
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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 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
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.
Upper pipe
Lower pipe
Move the drain cap from
the lower pipe to the
upper pipe.
CN504
Red
Black
For drain pipes that will be
connected after setup, make a
downward slope of 1/100 or more.
300 or less
Flexible drain hose
(supplied)
Drain up setup dimensions
– 11 –
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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 220V to 240V supply voltage to (1) and (2) on the power supply terminal block.
(Do not apply a 220V to 240V voltage to (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: 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.
220V to 240V
1
2
White
Black
Red
Black
Pull out connector CN34
(Red) from P.C. board.
Supply water hose
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