Mitsubishi Heavy Industries FDT28KXE6A Service Manual page 147

⑥Drain pipe (continued)
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"SW7-1" on the indoor unit PCB is turned ON, the Connec-
tor CNB is disconnected, and then the power supply (230VAC on the terminal block ① and ②) is turned ON.
Make sure to turn OFF "SW7-1" and reconnect the Connector CNB after the test.
In case of gravity drainage
1. Remove the rubber plug and insulation from the gravity drainage port.
2. Connect the drain hose (VP-20) using the Gravity drainage connecting tube (option) and
secure firmly with a clamp.
(﹡If the drain tube is directly connected with the gravity drainage port, the drain pan could not
be removed.)
3. Find CNR drain motor connector (blue, 2P) in the control box, and remove it.
(﹡If the unit is used with this connector being connected, the drainage will go out through
the standard drain connecting port, causing leaks.)
Transparent soft tube
(option)
Insulation
Rubber plug
(Remove)
Control box
Gravity drainage port
⑦Wiring-out position and wiring connection
● Electrical installation work must be performed according to the installation manual by an
electrical installation service provider qualified 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 specified 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 miscommu-
nication 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 a terminal block securely.
3. Fix the wiring with supplied screw, nut and washer.
4. Install the removed parts back to original place.
CNW1 CNM3 CNJ2
General hard type
PV pipe VP-20
Connector for drain motor CNR (blue, 2P)
Remove
CNR
Signal line
(Shielded cord)
Remote controller
line
Indoor power
source line
Earth
⑧Panel installation
●Attach the panel on the indoor unit after electrical wiring work.
Work procedure
1. Using the paper pattern attached as an accessory, check to ensure the unit height and
ceiling opening are finished true to the specified dimensions.
Remove the suction panel from the panel assembly. (Ref. below diagram)
Suction panel
Panel assembly
2. Among the bolts which are attached to the panel, 2 screw must
be inserted 5mm at the diagonal positions.
3. Hang the panel on the 2 bolts and temporarily tighten them.
4. Tighten the temporarily tightened 2 bolts and the remaining
2 bolts.
5. Tighten the 2 short bolts (15mm) at the louver supporting section of
blower outlet central part.
6. Connect the connecter of louver motor and limit switch through the
side cutout of control box.
7. When the louver motor does not operate by the remote controller operation, check the
connection of the connector, turn off the power for 10 seconds or longer, and reset.
⑨Check list after installation
●Check the following items after all installation work completed.
Check if
The indoor and outdoor units are fixed 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 specified size?
Any obstacle blocks airflow on air inlet and outlet?
144
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Pin(B)
Panel outer
Pin(A)
frame
Remove
Panel inside
parts
Short bolt
(Sectional view of blower
outlet central part)
Passing through this side cutout
Connect to relay connector
in the controll box.
Expected trouble
Falling, vibration, noise
Insufficient 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
Insufficient capacity
PJB012D227
Louver support
Check
A