Mitsubishi Heavy Industries FDC112KXEN6 Technical Manual page 197

f) Air bleed should not be provided in any event.
● When it is necessary to raise the drain head, the limitation is up to 600mm below the bottom face of ceiling where the
unit is installed. The distance is the dimension of the pipe which is installed perpendicularly from a point close to the
output for drain pipe connection.
Drain test
[Perform this before installing the ornament panel]
● Perform this upon completion of electrical work.
● Gradually introduce 2,000~3,000cc of water as shown below.
Fill from outlet port
● Connect the remote control switch and set to cooling operation. The drain pump will operate with the compressor on.
● Test whether or not the water is draining while listening to the operating sounds of the electric motor for the drain water.
Check the drainage condition by using the transparent socket.
● Check that water is draining smoothly and that there is no water dripping from the connections or other areas.
Forced drain pump operation
Setup from a unit side.
q In case electrical wiring work finished
Drain pump can be operated by remote controller (wired).
For the operation method, refer to Operation for drain pump in the installation manual for wiring work.
w In case electrical wiring work not finished
Drain pump will run continuously when the dip switch "W7-1" on the indoor unit PCB is turned ON, the Connector CNB is
disconnected, and then the power supply (230VAC on the terminal block q and w) is turned ON.
Make sure to turn OFF "W7-1" and reconnect the Connector CNB after the test.
95~3 5
Drain hose (accessory)
Drain piping connection port
(
Indoor
unit
Joints for VP- 0 (field procurement)
If the electrical work has not been completed, connect a convex joint
in the drain pipe connection to provide a water inlet.
Then, check if water leaks from the piping system and that drain flows
through the drain pipe normally.
Drain hose (provided)
193
- -
Unit : mm
Pour water into a convex joint
)