Mitsubishi Heavy Industries FDC112KXEN6 Technical Manual page 213

Procedures
q Supply about 1000 cc of water to the unit through the air outlet by using a feed water pump.
w Check the drain while cooling operation.
nsert water supply hose
for 20mm ~ 30mm to
supply water.
( nsert hose facing
toward bottom.)
Remove grommet
Make sure to nstall
it back after test.
Outline of bottom drain piping work
● If the bottom drain piping can be done with a
descending gradient (1/50-1/100), it is
possible to connect the pipes as shown in the
drawing below.
Uncoupling the drain motor connector
● Uncouple the connector CNR for the drain
motor as illustrated in the drawing on the right.
(
Note: If the unit is run with the connector
coupled, drain water will be discharged from
the upper drain pipe joint, causing a water
leak.
Drain pump operation
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.
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.
Attached drain hose clamp
Drain
Main
piping
unit
Drain situation can be checked with transparent socket.
f 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.
onnecting port of bottom drain pipes
Rubber stopper (to be removed)
)
For drain motor
connector CNR (blue)
209
- -
Pour water into a convex joint
onnecting port of top drain pipe
Standard hard polyvinyl
chloride pipes
.C. board
Insulating material