Mitsubishi Heavy Industries FDT28KXE6A Service Manual page 150

Drain pipe (continued)
Drain test
After installation of drain pipe, make sure that drain system work in good condition and no water
leakage from joint and drain pan. Check if the motor sound of drain pump is normal or not.
Do drain test even if installation of heating season.
For new building cases, make sure to complete the test before hanging the ceiling.
1. Pour water of about 1000cc into the drain pan in the indoor unit by pump so as not to get the
electrical component wet.
2. Make sure that water is drained out properly and there is no water leakage from any joints of the
drain pipe at the test.
Confi rm that the water is properly drained out while the drain motor is operating. At the drain socket
(transparent), it is possible to check if the water is drained out properly.
3. Unplug the drain plug on the indoor unit to remove remaining water on the drain pan after the test,
and re-plug it. And insulate the drain pipe properly fi nally.
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 (230VAC on the terminal block
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 clamps.
4. Install the removed parts back to original place.
L
Remote controller
line
Signal line
(Shielded cord)
Signal side terminal block
Power source side
terminal block
N
Earth (Signal line)
Earth
Indoor power
source line
Panel installation
Attach the panel on the indoor unit after electrical wiring work.
Refer to attached manual for panel installation for details.
Open the grille and remove the baffl e plate.
(Loosing the two screws.)
Screw the two installation screws to the indoor
unit.
Hook the panel the two screws (-
the panel approximately 10mm along the allow
in following fi gure. Screw left fi ve installation
screw to the indoor unit.
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?
147
- -
Connect the connectors of louver motor and
limit switch using "opening" space.
Ceiling opening
Baffle plate
Return the baffl e plate at its original position.
Close the grille.
Confi rm the grille fi xed with a hook securely.
* The grille may take the liberty to open if grille is not
fi xed securely.
Detail A
), and slide
Sliding direction
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
PJC012D012
Opening
Connector
Check