Mitsubishi Electric FDT125VNVF Technical Manual page 215

⑥
Drain pipe (continued)
Drain test
l 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.
l Do drain test even if installation of heating season.
l 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.
Confirm 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 finally.
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 Connector CNB is disconnected, and then the power supply (220-240VAC on the terminal block
[ ① and ②] or [ Ⓛ and Ⓝ ] ) is turned ON.
Make sure to turn OFF "SW7-1" and reconnect the Connector CNB after the test.
⑦
Wiring-out position and wiring connection
l 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.
l 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.
l Do not put both power source line and signal line on the same route. It may cause
miscommunication and malfunction.
l Be sure to do D type earth work.
l For the details of electrical wiring work, see attached instruction manual for electrical wiring work.
1. Remove a lid of the control box (1 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
Signal side terminal block
Drain plug
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)
-
⑧
Panel installation
l After wiring work finished, install the panel on the indoor unit.
l Refer to attached panel installation manual for details.
Accessory items
1 Hook
2 Chain
3 Bolt
4 Screw
5 Screw
l Attach the panel on the indoor unit after electrical wiring work.
l Refer to attached manual for panel installation for details.
⑨
Check list after installation
l 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?
214
-
'12 • PAC-T-174
(see next page)
1 piece For fixing temporarily
2 pieces
4 pieces For installing the panel
1 piece For attaching a hook
2 pieces For attaching a chain
（See next page）
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
PJA012D786
PJA012D781
Check