Daikin RKH50QRV16 User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
5.0 kW Class
Outdoor Unit
Inverter
Pair Type
Si001409EB

Service Manual
Removal Procedure
Outdoor Unit
zCooling Only
RKH50QRV16
RKH50RRV16
RKP50PRV16
RKP50QRV16
RKPA50QRV16
RKPD50QRV16

Si001409EB
Removal Procedure 1
Table of Contents
1. Outer Panels ...........................................................................................2
2. Outdoor Fan / Fan Motor.........................................................................5
3. Electrical Box ..........................................................................................7
4. PCB.......................................................................................................11
5. Thermistor ASSY ..................................................................................13
6. Reactor / Sound Blankets .....................................................................15
7. Capillary Tube .......................................................................................17
8. Compressor...........................................................................................19
Note: The illustrations may be slightly different depending on the model.

Outer Panels Si001409EB
2Removal Procedure
1. Outer Panels
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1 Remove the 4 screws,
and then the top panel.
The shape of the discharge
grille varies depending on
the model.
2 Remove the 4 screws,
and then the left side
cover.
Some models do not have
the left side cover.
3 For square grille
models, remove the 7
screws of the front
panel.
For round grille models,
remove 8 screws.
For round grille models
Top panel
(R20218)
Left side cover
(R20219)
(R20653)
Front panel
(R23681)

Si001409EB Outer Panels
Removal Procedure 3
4 Unfasten the 2 hooks
and remove the front
panel.
When reassembling, make
sure that the 2 hooks are
securely fastened.
5 Remove the 4 screws
of the discharge grille.
For square grille models
6 Unfasten the 6 hooks
and remove the
discharge grille.
Step Procedure Points
Hook
(R20221)
(R22577)
Discharge grille
(R20654)
Hook
Hook
Discharge grille

Outer Panels Si001409EB
4Removal Procedure
7 Press the 2 projections
from the rear side and
rotate the discharge
grille.
For round grille models
8 Unfasten the 6 hooks
and remove the
discharge grille.
Step Procedure Points
Rear side
Projection
(rear side)
Discharge grille
(R22383)
Hook
Hook (R22384)

Si001409EB Outdoor Fan / Fan Motor
Removal Procedure 5
2. Outdoor Fan / Fan Motor
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1
2
Disconnect the
connector [S70].
Release the fan motor
lead wire from the
groove of the partition
plate and from the 4
hooks on the electrical
box.
This procedure is not
necessary to remove only
the outdoor fan.
[S70]: fan motor
3 Remove the nut, and
then the outdoor fan.
Nut size: M6
When reassembling, align
the mark of the outdoor
fan with the D-cut section of
the motor shaft.
(R20739)
[S70]
Groove
Hook (R19360)
Outdoor fan
(R18431)
10 mm
(0.39 inch)
(R18954)

Outdoor Fan / Fan Motor Si001409EB
6Removal Procedure
4
5
Remove the screw of
the fan motor fixing
frame.
Unfasten the 2 hooks at
the bottom and remove
the fan motor fixing
frame.
When reassembling, fit the 2
lower hooks into the bottom
frame.
6 Open the 2 hooks and
release the fan motor
lead wire.
When reassembling, put the
fan motor lead wire through
the back of the fan motor to
avoid entanglement with the
outdoor fan.
7 Remove the 4 screws,
and then the fan motor.
Step Procedure Points
(R18432)
Fan motor fixing frame
(R22574)
(R18433)
Hook
Fan motor lead wire
(R3249)
Lead wire Outdoor fan
(R18434)
Fan motor

Si001409EB Electrical Box
Removal Procedure 7
3. Electrical Box
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1 Disconnect the
connector [S70].
[S70]: fan motor
2 Disconnect the
connector [S40].
[S40]: overload protector
3
4
Disconnect the
connector [S90].
Cut the clamp.
[S90]: thermistors
(R19362)
[S70]
(R18435)
[S40]
[S90]
(R20614)
Clamp

Electrical Box Si001409EB
8Removal Procedure
5 Disconnect the 2
connectors of the
reactor.
(1) orange
(2) brown
6 Disconnect the relay
connector for the
compressor.
7 Remove the screw, and
then the stop valve
cover.
Step Procedure Points
Reactor
(2)
(1)
(R20615)
(R20616)
Relay connector
(R18440)
Stop valve
cover

Si001409EB Electrical Box
Removal Procedure 9
8 Remove the 3 screws,
and then the wire
fixture.
9 Remove the 7 screws
on the terminal board
and disconnect the
connecting wire and the
power supply wire.
10 Remove the 2 screws
on the right side panel.
Step Procedure Points
(R18441)
Wire fixture
(R20431)
Connecting wire Power supply wire
Terminal
board
(R19364)
Right side panel

Electrical Box Si001409EB
10 Removal Procedure
11 Remove the screw on
the partition plate.
12 Lift and remove the
electrical box.
Step Procedure Points
(R18444)
Partition plate
(R18445)
Electrical box

Si001409EB PCB
Removal Procedure 11
4. PCB
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1 Remove the screw, and
then the electrical box
cover.
Some models have sealing
material.
2
3
Disconnect the 3
connectors from the
terminal board.
Remove the screw and
release the earth/
ground wire (upper).
4 Cut the clamp.
Electrical
box cover
Sealing
material
(R23682)
Connector
(R23794)
Earth/ground wire (upper)
screw
(R20237)
HN1 (white)
HL1 (black) S (red)
Clamp
(R20618)

PCB Si001409EB
12 Removal Procedure
5 Remove the screws,
and then the main PCB.
The main PCB may be fixed
by 5 or 7 screws, depending
on the model.
Step Procedure Points
Main PCB
Pattern 1 (5 screws)
(R23683)
(R23799)
Pattern 2 (7 screws)

Si001409EB Thermistor ASSY
Removal Procedure 13
5. Thermistor ASSY
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1 Detach the holder and
pull out the outdoor
temperature thermistor.
The shape of the protection
net varies depending on the
model.
2
3
Remove the 5 screws
of the right side panel.
Remove the right side
panel.
When reassembling, insert
the 2 lower hooks and the
upper hook of the back.
4 Release the discharge
pipe thermistor.
Be careful not to lose the
fixture for the thermistor.
Holder
Outdoor
temperature
thermistor
(R20620)
Right side panel
(R20621)
Discharge pipe
thermistor
(R22583)
(R20430)
Fixture

Thermistor ASSY Si001409EB
14 Removal Procedure
5 Cut the clamp and pull
out the outdoor heat
exchanger thermistor.
Be careful not to lose the clip
for the thermistor.
6
7
Cut the clamp and
release the thermistor
ASSY.
Remove the thermistor
ASSY.
Step Procedure Points
Clamp
Outdoor heat
exchanger
thermistor
(R20623)
(R3264)
Clip
Clamp
(R20624)
(R20246)
Thermistor ASSY

Si001409EB Reactor / Sound Blankets
Removal Procedure 15
6. Reactor / Sound Blankets
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1 Remove the screw.
2 Remove the reactor. There is a hook at the
bottom of the reactor.
3 Remove the 2 screws,
and then the partition
plate.
Reactor
(R20625)
(R18455)
(R20626)
Partition plate

Reactor / Sound Blankets Si001409EB
16 Removal Procedure
4 Untie the string and pull
out the sound blanket
(outer).
Since the piping ports are
torn easily, remove the
sound blanket carefully.
5 Remove the sound
blanket (top).
Some models do not have
the sound blanket (top).
6 Pull out the sound
blanket (inner).
Some models do not have
the sound blanket (inner).
When reassembling, mount
the sound blankets and the
partition plate in the following
order.
(1) Bottom
(2) Inner
(3) Outer
(4) Top
(5) Partition plate
7 Pull out the sound
blanket (bottom).
Some models do not have
the sound blanket (bottom).
Step Procedure Points
(R20248)
Sound blanket (outer)
(R20249)
Sound blanket (top)
Sound blanket (inner)
(R20250)
(R19453)
Sound blanket (bottom)

Si001409EB Capillary Tube
Removal Procedure 17
7. Capillary Tube
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Be careful not to get yourself burnt with the pipes and other parts that are heated by
the gas brazing machine.
If the refrigerant gas leaks during work, ventilate the room. (If the refrigerant gas is
exposed to flames, toxic gas may be generated.)
Caution From the viewpoint of global environment protection, do not discharge the refrigerant
gas in the atmosphere. Make sure to collect all the refrigerant gas.
Restore the piping by non-oxidation brazing.
Note Before working, make sure that the refrigerant gas is empty in the circuit.
Be sure to apply nitrogen replacement when heating up the brazed part.
Do not use a metal saw for cutting pipes by all means because the sawdust comes into
the circuit.
When withdrawing the pipes, be careful not to pinch them firmly with pliers. The pipes
may get deformed.
Provide a protective sheet or a steel plate so that the brazing flame cannot influence
peripheries.
Be careful so as not to burn the compressor terminals, the name plate, the outdoor
heat exchanger fin.
In case of difficulty with gas brazing machine
1. Disconnect the brazed part where is easy to disconnect and restore.
2. Cut pipes on the main unit with a tube cutter in order to make it easy to disconnect.
Step Procedure Points
1 Remove the terminal
cover. Terminal cover
(R20627)

Capillary Tube Si001409EB
18 Removal Procedure
2
3
Remove the protection
bushing.
Disconnect the
compressor lead wires
and the overload
protector.
4
5
Remove the putties.
Heat up the 2 brazed
parts and remove the
capillary tube.
The shape of the capillary
tube varies depending on the
model.
Step Procedure Points
(R22576)
U (red)
W (blue)
V (yellow)
Protection
bushing
Overload
protector
Putty
Brazed
part
Putty
(R20628)