Daikin RKM50PRV16 User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
5.0/6.0/7.1 kW Class
Outdoor Unit
Inverter
Pair Type
Si001405EB

Service Manual
Removal Procedure
Outdoor Unit
zCooling Only
RKM50PRV16
RKM60PRV16
RKM50QRV16
RKM60QRV16
RKM50RRV16
RKM60RRV16
RKMA50QRV16
RKMA60QRV16
RKMA50RRV16
RKMA60RRV16
RKMD50QRV16
RKMD60QRV16
RKMD50RRV16
RKMD60RRV16
RKP71QRV16
RKP71RRV16
RKPA71QRV16
RKPA71RRV16
RKPD71QRV16
RKPD71RRV16

Si001405EB
Removal Procedure 1
Table of Contents
1. Outer Panels ...........................................................................................2
2. Outdoor Fan / Fan Motor.........................................................................4
3. Electrical Box ..........................................................................................6
4. PCBs .....................................................................................................10
5. Thermistor ASSY ..................................................................................12
6. Partition Plate / Sound Blankets............................................................14
7. Electronic Expansion Valve...................................................................16
8. Compressor...........................................................................................18
Note: The illustrations may be slightly different depending on the model.

Outer Panels Si001405EB
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.
2 Remove the 4 screws,
and then the left side
cover.
3 Remove the 7 screws
of the front panel.
Top panel
(R20218)
Left side cover
(R20219)
(R23688)
Front panel

Si001405EB Outer Panels
Removal Procedure 3
4 Remove the 4 screws
of the discharge grille.
5 Unfasten the 2 hooks
and remove the front
panel.
When reassembling, make
sure that the 2 hooks are
securely fastened.
6 Unfasten the 6 hooks
and remove the
discharge grille.
Step Procedure Points
(R23689)
Discharge
grille
Hook
(R20221)
(R20222)
Hook
Hook
Discharge grille

Outdoor Fan / Fan Motor Si001405EB
4Removal Procedure
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 Cut the clamp.
2 Disconnect the
connector [S79].
[S79]: fan motor
3 Release the fan motor
lead wire from the 2
slits and the 4 hooks on
the electrical box.
(R23690)
Clamp
[S79]
(R20224)
(R20429)
Hook
Slit

Si001405EB Outdoor Fan / Fan Motor
Removal Procedure 5
4 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.
5
6
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.
7 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.
8 Remove the 4 screws,
and then the fan motor.
Step Procedure Points
Nut Outdoor fan
(R20225)
10 mm
(0.39 inch)
(R18954)
Fan motor fixing frame
(R20226)
(R22574)
(R18433)
Hook
Fan motor lead wire
(R3249)
Lead wire Outdoor fan
(R19433)
Fan motor

Electrical Box Si001405EB
6Removal Procedure
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 Cut the clamp.
2 Disconnect the
connector [S79].
[S79]: fan motor
3 Disconnect the
connector [S20].
[S20]: electronic expansion
valve coil
(R23690)
Clamp
[S79]
(R20224)
[S20]
(R20227)

Si001405EB Electrical Box
Removal Procedure 7
4 Disconnect the
connector [S40].
[S40]: overload protector
5 Disconnect the
connector [S90].
[S90]: thermistors
6 Cut the clamp.
7 Disconnect the relay
connector for the
compressor.
Step Procedure Points
[S40]
(R20228)
[S90]
(R20229)
(R20230)
Clamp
Relay connector
for compressor (R20231)

Electrical Box Si001405EB
8Removal Procedure
8
9
Remove the screw.
Slide the stop valve
cover downward and
remove it.
When reassembling, make
sure to fit the 3 hooks.
10 Remove the 3 screws,
and then the wire
fixture.
Step Procedure Points
(R20232)
Stop valve cover
(R20233)
Hook
(R18441)
Wire fixture

Si001405EB Electrical Box
Removal Procedure 9
11 Remove the 7 screws
and disconnect the
connecting wire and the
power supply wire.
12 Remove the 2 screws
on the right side panel.
13
14
Remove the screw on
the partition plate.
Lift up and remove the
electrical box.
Step Procedure Points
(R20431)
Connecting wire Power supply wire
Terminal
board
(R20432)
Right side panel
Electrical box
(R20234)

PCBs Si001405EB
10 Removal Procedure
4. PCBs
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.
2
3
Disconnect the 3
connectors from the
terminal board.
Remove the screw and
release the earth/
ground wire (upper).
4 Cut the 2 clamps.
Electrical box cover
(R20235)
Connector
(R23794)
Earth/ground wire (upper)
screw
(R23817)
HN1 (white)
HL1 (black) S (red)
Clamp
(R20238)

Si001405EB PCBs
Removal Procedure 11
5 Disconnect the relay
connector for the fan
motor.
6 Remove the 7 screws.
7 Remove the main PCB.
8
9
Turn over the electrical
box.
Pinch the 4 clamps and
remove the relay PCB.
Step Procedure Points
(R20239)
Relay connector
for fan motor
(R20240)
Main PCB
(R20241)
(R20242)
Relay PCB
Clamp
Clamp

Thermistor ASSY Si001405EB
12 Removal Procedure
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 Pull out the outdoor
temperature thermistor.
When reassembling, pass
the outdoor temperature
thermistor through the top U-
bend of the outdoor heat
exchanger.
2
3
Remove the 5 screws
of the right side panel.
Remove the right side
panel.
4
5
Cut the clamp.
Pull out the outdoor
heat exchanger
thermistor.
Be careful not to lose the clip
for the thermistor.
(R19516)
Outdoor temperature thermistor
(R23691)
(R19517)
Right side panel
Clamp
(R20244)
Outdoor heat
exchanger
thermistor
(R3264)
Clip

Si001405EB Thermistor ASSY
Removal Procedure 13
6
7
Release the discharge
pipe thermistor.
Remove the thermistor
ASSY.
Be careful not to lose the
fixture for the thermistor.
Step Procedure Points
Discharge pipe
thermistor
(R22575)
(R20246)
Thermistor ASSY
(R20430)
Fixture

Partition Plate / Sound Blankets Si001405EB
14 Removal Procedure
6. Partition Plate / 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 2 screws,
and then the partition
plate.
Since the piping ports are
torn easily, remove the
sound blanket carefully.
2
3
Untie the string and
open the sound blanket
(outer).
Pull out the sound
blanket (outer).
4 Remove the sound
blanket (top).
(R23692)
Partition plate
(R20248)
Sound blanket (outer)
(R20249)
Sound blanket (top)

Si001405EB Partition Plate / Sound Blankets
Removal Procedure 15
5 Pull out the sound
blanket (inner).
6 Pull out the sound
blanket (bottom).
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
Step Procedure Points
Sound blanket (inner) R20250
(R19453)
Sound blanket
(bottom)

Electronic Expansion Valve Si001405EB
16 Removal Procedure
7. Electronic Expansion Valve
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 Pull out the electronic
expansion valve coil.
2 Remove the terminal
cover.
(R20251)
Electronic
expansion valve
coil
Terminal cover
(R20252)

Si001405EB Electronic Expansion Valve
Removal Procedure 17
3
4
Remove the protection
bushing.
Disconnect the
compressor lead wires
and the overload
protector.
5
6
Remove the putties.
Heat up the 2 brazed
parts and remove the
electronic expansion
valve.
Step Procedure Points
(R22576)
U (red)
W (blue)
V (yellow)
Protection
bushing
Overload
protector
Putty
(R20254)
Brazed
part
Electronic
expansion
valve

Compressor Si001405EB
18 Removal Procedure
8. Compressor
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.)
Since it may happen that the refrigerant oil in the compressor catches fire, prepare wet
cloth so as to extinguish fire immediately.
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.
2
3
Remove the protection
bushing.
Disconnect the
compressor lead wires
and the overload
protector.
Terminal cover
(R20252)
(R22576)
U (red)
W (blue)
V (yellow)
Protection
bushing
Overload
protector