Panasonic CU-3KE19NBU, CS-MKE9NB4U, CU-4KE31NBU, CU-4KE24NBU, CZ-18BT1U Checking the Drainage, 10a

3-5. Checking the Drainage

After wiring and drain piping are completed, use the following pro- cedure to check that the water will drain smoothly. For this, pre- pare a bucket and wiping cloth to catch and wipe up spilled water.

Be sure to do the wiring between the units before installing the ceiling panel. (Refer to 3-8. Wiring Instructions for Inter-unit Connections)

(1)Turn on the power. (Here, “power” refers to the power supply from the outdoor unit.)

(2)Slowly pour approx. 16 ounces (500 ml) of water into the drain pan to check drainage. (Fig. 6-10a)

(3)Remove the 2 screws from the control box cover, then open the cover. Be careful not to drop the cover at this time.

(4)Disconnect the FS 3P connector (red) on the control PCB and operate the drain pump. (Fig. 6-10b) Check the water flow through the transparent drain pipe and see if there is any leakage.

(5)When the check of drainage is complete, reconnect the FS 3P connector and remount the control cover.

Water drain

Over 4"

(100mm)

Control box

Plastic container	Drain pan outlet
for water intake	Water
	(Approx. 16 ounces (500m ) )

Fig. 6-10a

Control box

)/$3

The drain pump will continue to CAUTION operate for a minimum of 6 min-

utes after the FS 3P connector is reconnected.

3-6. How to Install the Ceiling Panel

Checking the unit position

FS IND RC

Fig. 6-10b

Amust be within the range of 1/2"(13mm) to 23/32"(18mm). (Fig. 6-11) If not within this range, malfunction or other trouble may occur.

Indoor unit

(1)Check that the ceiling hole is 23-5/8" (600 mm)
23-5/8" (600 mm) (Fig. 6-11)

(2)Confirm that the position of the indoor unit and the ceiling as shown in the diagram. If the positions of the ceiling sur- face and unit do not match, air leakage, water leakage, flap operation failure, or other problems may occur. (Fig. 6-11)

ACeilingopening

dimension

Ceiling side /DWFK

Fig. 6-11

NO Flap

CAUTION

Never place the panel face-down. Neither hang it ver- tically nor place it on top of a projecting object. Plac- ing it face-down will damage the surface.

Do not touch the flap or apply force to it. (This may cause flap malfunction.) (Fig. 6-12)

3-6-1. Before Installing the Ceiling Panel

(1)Remove the air-intake grille and air filter from the ceiling panel.

a)Press on and slide the two latches of the air-intake grille with your thumb in the direction shown by the arrow 1 to open the grille. (Figs. 6-13 and 6-14)

b)With the air-intake grille opened, remove the grille hinge from the ceiling panel by sliding it in the direction shown by the arrow 2 . (Fig. 6-15)

Fig. 6-12 Fig. 6-13

Ceiling panel

Air-intake grille

1

1

Air-intake grille hinge

Fig. 6-14

2

Fig. 6-15

9