Mitsubishi Heavy Industries FDT200VSAWPVH Service Manual page 141

⑥Drain pipe (continued)
● When sharing a drain pipe for more than 1
unit, lay the main pipe 100mm below the
drain outlet of the unit. In addition, select
VP30 or bigger size for main drain pipe.
6. Insulate the drain pipe.
● B e sure to insulate the drain socket and rigid PVC pipe installed indoors otherwise it may cause
dew condensation and water leakage.
※ A fter drainage test implementation, cover the drain socket part with pipe cover (small size), then use
the pipe cover (big size) to cover the pipe cover (small size), clamps and part of the drain hose, and fix
and wrap it with tapes to wrap and make joint part gapless.
Drain up
● The position for drain pipe outlet can be raised up to
850mm above the ceiling. Use elbows for installation
to avoid obstacles inside ceiling. If the horizontal
drain pipe is too long before vertical pipe, the
backflow of water will increase when the unit is
stopped, and it may cause overflow of water from the
drain pan on the indoor unit. In order to avoid
overflow, keep the horizontal pipe length and offset of
the pipe within the limit shown in the figure below.
Drain test
● After installing the drain pipe, make sure that drain system works correctly and that no water leaks
from the joint and drain pan. Check whether the motor sound of the drain pump is normal.
● Conduct a drain test when installing, even during the heating season.
● In the case of new buildings, be sure to complete the test before fixing the ceiling.
1. Pour about 1,000 cc of test water into the drain pan of the indoor unit. Exercise care not to
allow electrical equipment such as the drain pump and other components to become wet
while filling water.
Pour test water through the pipe lid using a feed water pump or a similar device, or through
the refrigerant pipe joint.
● In case of pouring water from the air outlet
Rubber plug
2. Make sure that water drains out completely and that no water leaks from any joints of the
drain pipe during the test.
Test to confirm that the water drains out correctly while listening to the drain pump motor operating sound.
At the drain socket (transparent), it is possible to check whether the water drains out correctly.
3. Unplug the rubber plug on the indoor unit so that the remaining water drains from the drain
pan after the draining test.
After checking the water drainage, fix the rubber plug correctly. Installation work for the drain
pipe must be performed for the entire drain pipe up to the indoor unit.
If the pipe lid has been removed in order to pour water, mount the pipe lid again.
Drain pump operation
● In case electrical wiring work completed
Drain pump can be operated by the wired remote control.
For the operation method, refer to Operation for drain pump in the installation manual for wiring work.
● In case electrical wiring work not completed
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 source (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.
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 miscom-
munication 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. Loosen screws (2 pcs.) on the control box of the unit.
2. Remove the control lid by sliding it in the arrow direction in the figure.
3. Introduce the wiring in the control box, and connect it securely to the terminal block.
4. Fix the wiring with bands as shown below.
5. Install the control lid, with care not to pinch the wiring, and fix the lid with screws (2 pcs.).
VRF ( KX ) series
Band
Earth Band
Power source side Signal side
Power terminal block terminal block
Single Split ( PAC ) series
Band
Earth Band
Power source side Signal side
Power terminal block terminal block
As wide as possible (about100mm)
Descending slopegreater than 1/100 VP30 or bigger
215 to 245mm 100 or less
Drain hose
Joint for VP25 (Prepare on site)
● In case of pouring water from the pipe lid
(1) Remove screws at 2 places.
(2) Release the claws, and remove the lid.
Lid
Claw
Screw Drain pan
Signal line
Band
Screw Control lid
Slide
Band Remote
control line
Main fuse specification
Band
Specification Part No.
Band Remote
T3.15A L250V SSA564A149AF
control line
⑧Panel installation
● Install the panel on the indoor unit after electrical wiring work.
● Refer to the attached manual for panel installation for details.
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?
Power source 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?
⑩How to check the dirt of drain pan and cleanimg the inlet of the drain pump (Maintenance)
The method of checking the dirt of drain pan
1. Remove the panel according to the installation manual of the panel.
2. Check the dirt on the drain pan from the drain cap, and check the drain pump inlet. If the
drain pan is very dirty, remove the drain pan and clean it.
(Before removing drain cap) (After removing drain cap)
Drain cap
Cleaning of drain pump inlet
● It is possible to clean the drain pump inlet and surrounding area by removing the drain cap
only; it is not necessary to remove the drain pan.
● Before removing the drain cap, remove the rubber plug and drain water from the drain pan.
1. Insert the nose of the pliers into the concave portions (2 places) of the drain cap, and rotate
the pliers about 1 turn in the CCW direction. The drain cap is removed.
2. When cleaning the drain pump inlet, use a soft plastic tool. If a metallic tool is used, the
drain cap mounting portion may be scratched and water may leak.
3. Before mounting the drain cap, rinse it and remove any foreign material from the inside of
the cap. If the drain cap is installed with foreign material inside it, it may cause water to leak.
4. Insert the nose of the pliers into the concave portions of the drain cap and rotate the pliers to
install the drain cap. Rotate the drain cap about 1 turn in the CW direction until it stops rotating.
If the drain cap is not rotated for 1 or more turns, the cap will not have been installed correctly.
Remove the drain cap, and then install it again correctly.
5. After tightening the drain cap, make sure the triangle
mark on the drain pan. If these triangle marks are not close to each other, tighten the drain cap further.
6. Refix the rubber plug securely. If the cover is not refixed correctly, it may cause condensation
to form and/or water to leak.
Drain cap
Insert the nose of pliers
into the concave portion,
and turn the drain cap.
Notes for removing the drain pan
● Before removing the drain pan, drain water from the drain pan. Remove the rubber plug
and drain water.
● The drain pan is installed by the temporary installation plate. Remove the 2 drain pan
fixing screws, and loosen the 2 screws of the temporary installation plate.
Slide the temporary installation plate to the outside of the drain pan. And then,it is possible
to remove the drain pan.
● When reinstalling the drain pan, slide the temporary installation plate to the inside and
temporarily fix the drain pan. Then, tighten the 2 drain pan fixing screws and the 2 screws
of the temporary installation plate. Also, refix the rubber plug securely.
Temporary installation plate of the drain pan
Remove the screws.
Loosen the screws.
Temporary installation
plate of the drain pan
140
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'21 • PAC-SM-383
Expected trouble Check
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
Drain pump inlet
( ) mark of the drain cap comes close to the triangle
Drain pump inlet
Triangle (△) mark
Drain pump of drain cap
Drain pan
Exercise care not to scratch
Triangle (△) mark of drain pan
the end, inside, or threads
Tighten the drain cap untill its
of drain cap seal.
triangle marks become close to
those on the drain pan.
Slide the plate
to the outside.
PJF012D509