Mitsubishi Heavy Industries FDT28KXE6A Service Manual page 142

Drain pipe (continued)
Drain pump operation
In case electrical wiring work fi nished
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 fi nished
Drain pump will run continuously when the dip switch"SW7-1" on the indoor unit PCB is turned ON,
the Connector CNB is disconnected, and then the power supply (220-240VAC on the terminal block
[ and ] or [ and ] ) is turned ON.
Make sure to turn OFF "SW7-1" and reconnect the Connector CNB after the test..
Wiring-out position and wiring connection
Electrical installation work must be performed according to the installation manual by an electrical
installation service provider qualifi ed by a power provider of the country, and be executed according
to the technical standards and other regulations applicable to electrical installation in the country.
Be sure to use an exclusive circuit.
Use specifi ed cord, fasten the wiring to the terminal securely, and hold the cord securely in order not
to apply unexpected stress on the terminal.
Do not put both power source line and signal line on the same route. It may cause
miscommunication and malfunction.
Be sure to do D type earth work.
For the details of electrical wiring work, see attached instruction manual for electrical wiring work.
1. Remove a lid of the control box (2 screws).
2. Hold each wiring inside the unit and fasten them to terminal block securely.
3. Fix the wiring with clamp.
4. Install a lid of the control box back to original place.
Single split (PAC) series
Signal side terminal block
VRF (KX) series
Panel installation
After wiring work fi nished, install the panel on the indoor unit.
Refer to attached panel installation manual for details.
Accessory items
1 Hook 1 piece
2 Chain 2 pieces
3 Bolt 4 pieces
4 Screw 1 piece
5 Screw 2 pieces
Power source side terminal block
Earth
Wiring between indoor
and outdoor unit
Remote controller line
Wiring clamp
Power source side terminal block
Earth
Indoor power source line
Signal line (shielded cord)
Remote controller line
Wiring clamp
Earth (signal line)
Signal side terminal block
(see next page)
For fi xing temporarily
For installing the panel
For attaching a hook
For attaching a chain
Panel installation (continued)
Work procedure
1. Make sure that the indoor unit is positioned at the correct height with the supplied level gauge.
Remove the level gauge before you install the panel.
2. Screw the two bolts of the supplied four bolts by about 5mm. ( mark
3. Attach the supplied hook to the indoor unit with the screw (1 screw). [Figure 2]
4. Open the air return grille.
5. Remove the screw of a corner panel and remove a corner panel. (four places) [Figure 3]
6. Hang the panel on two bolts. ( mark
7. Rotate the hook and put it into the slot of the panel. And install the panel temporarily.
[Figure 5]
8. Tighten the two bolts which were used to install the panel temporarily and the other two bolts.
9. Open a lid of the control box.
10. Fix the louver motor wiring and the drain pump wiring with clamp. And put louver motor wiring into
the control box. [Figure 6]
11. Connect the connector of louver motor. [Figure 6]
12. Attach two chains to the air return grille with two screws. [Figure 7]
13. Install the corner panels back to original places. At that time attach the chains to the panel with
screws together.
14. Close the air return grille.
Corner panel
Screw
[Figure 3]

Chain
[Figure 7]
Check list after installation
Check the following items after all installation work completed.
Check if
The indoor and outdoor units are fi xed securely?
Inspection for leakage is done?
Insulation work is properly done?
Water is drained properly?
Supply voltage is same as mentioned in the model name plate?
There is mis-wiring or mis-connection of piping?
Earth wiring is connected properly?
Cable size comply with specifi ed size?
Any obstacle blocks airfl ow on air inlet and outlet?
139
- -
) [Figure 4]
Control box
Drain hose Side
Piping side
[Figure 2]


[Figure 1]
[Figure 5]


[Figure 5]
[Figure 4]
Drain pump connector
Louver motor connector
Chain
Expected trouble
Falling, vibration, noise
Insuffi cient capacity
Water leakage
Water leakage
PCB burnt out, not working at all
PCB burnt out, not working at all
Electric shock
PCB burnt out, not working at all
Insuffi cient capacity
PJA012D756
) [Figure 1]
Wire intake
Wiring clamp
Louver motor wiring
[Figure 6]
Check
A