Daikin RKM25PRV16 User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Outdoor Unit
Inverter
Pair Type
2.5/3.5 kW Class
Si001410EB

Service Manual
Removal Procedure
Outdoor Unit
zCooling Only
RKM25PRV16
RKM35PRV16
RKM25QRV16
RKM35QRV16
RKM25RRV16
RKM35RRV16
RKMA25QRV16
RKMA35QRV16
RKMA25RRV16
RKMA35RRV16
RKMD25QRV16
RKMD35QRV16
RKMD25RRV16
RKMD35RRV16
RKP25RRV16
RKP35RRV16
RKPA25RRV16
RKPA35RRV16
RKPD25RRV16
RKPD35RRV16

Si001410EB
Removal Procedure 1
Table of Contents
1. Outer Panels ...........................................................................................2
2. Outdoor Fan / Fan Motor.........................................................................4
3. Electrical Box ..........................................................................................6
4. Thermistor ASSY ....................................................................................9
5. PCB.......................................................................................................10
6. Reactor / Partition Plate ........................................................................12
7. Sound Blankets .....................................................................................13
8. Electronic Expansion Valve...................................................................14
9. Compressor...........................................................................................16
Note: The illustrations may be slightly different depending on the model.

Outer Panels Si001410EB
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
2
Remove the screw of
the stop valve cover.
Pull down the stop
valve cover and remove
it.
When reassembling, make
sure to fit the 5 hooks.
3
4
Remove the 2 screws,
and then the top panel.
Remove the 4 screws,
and then the discharge
grille.
The discharge grille has 4
hooks.
5 Remove the 7 screws,
and then the front
panel.
The front panel has 4 hooks.
Stop valve
cover
(R20256)
Hook
(R20257)
Top panel
Discharge grille (R20258)
(R20259)
Front panel (R20260) (R20261)

Si001410EB Outer Panels
Removal Procedure 3
6
7
Release the outdoor
temperature thermistor.
Lift up the guard net
and remove it.
Be careful not to cut your
finger on the fins of the
outdoor heat exchanger.
8
9
Remove the 3 screws,
and then the wire
fixture.
Remove the 7 screws
on the terminal board
and disconnect both the
connecting wire and the
power supply wire.
10
11
Remove the 7 screws
on the right side panel.
Lift up the right side
panel and remove it.
When reassembling, make
sure to fit the 2 hooks on the
right and rear side.
Step Procedure Points
Guard net
Outdoor temperature thermistor
(R20734)
Wire fixture
Terminal board
Connecting wire
Power supply wire
(R20263)
Right side panel
Hook
Hook
(R20264)
(R22578)

Outdoor Fan / Fan Motor Si001410EB
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
2
Remove the nut of the
outdoor fan.
Remove the outdoor
fan.
You can remove the outdoor
fan without removing the
right side panel.
Nut size: M6
When reassembling, align
the mark of the outdoor
fan with the D-cut section of
the motor shaft.
3 Disconnect the
connector [S70] or
[S71] depending on the
model.
[S70]/[S71]: fan motor
The location of the
connectors [S70] and [S71]
is different.
4 Release the fan motor
lead wire from the
groove and the hook.
Some models do not have
the hook.
Outdoor fan
Nut
(R23497)
10 mm
(0.39 inch)
(R18954)
[S71] [S70]
(R23498)
Hook Groove
Fan motor
lead wire
(R22579)

Si001410EB Outdoor Fan / Fan Motor
Removal Procedure 5
5 Remove the screw, and
then the fan motor
fixing frame.
When reassembling, fit the 2
lower hooks into the bottom
frame.
6 Unfasten the 2 hooks
and release the fan
motor lead wire.
7 Remove the 4 screws,
and then the fan motor.
When reassembling, put the
fan motor lead wire through
the back of the fan motor to
avoid any entanglement with
the outdoor fan.
Step Procedure Points
Fan motor fixing
frame
(R20635)
Hook
(R20269)
(R22580)
Fan motor lead wire
(R22654)
Fan motor
(R3249)
Lead wire Outdoor fan

Electrical Box Si001410EB
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 [S70] or
[S71].
[S70]/[S71]: fan motor
3 Release the fan motor
lead wire from the
groove and the hook.
Some models do not have
the hook.
4 Disconnect the
connector [S20].
[S20]: electronic expansion
valve coil
Clamp
(R20646)
[S71] [S70]
(R23498)
Hook Groove
Fan motor
lead wire
(R22579)
[S20]
(R20636)

Si001410EB Electrical Box
Removal Procedure 7
5 Disconnect the
connector [S30].
[S30]: compressor
6 Disconnect the
connector [S40].
[S40]: overload protector
7 Disconnect the 2
connectors for the
reactor.
8
9
Disconnect the
connector [S90].
Cut the clamp.
[S90]: thermistors
Step Procedure Points
[S30]
(R20647)
[S40]
(R20648)
Reactor
Brown
Orange
(R20275)
[S90] Clamp
(R20276)

Electrical Box Si001410EB
8Removal Procedure
10 Lift up and remove the
electrical box.
Step Procedure Points
Electrical box
(R23499)

Si001410EB Thermistor ASSY
Removal Procedure 9
4. 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 Release the discharge
pipe thermistor.
Be careful not to lose the
fixture for the thermistor.
2
3
Cut the clamp.
Pull out the outdoor
heat exchanger
thermistor.
The positions of the clamp
and outdoor heat exchanger
thermistor vary depending
on the model.
Be careful not to lose the clip
for the thermistor.
4 Remove the thermistor
ASSY.
Discharge pipe
thermistor
(R20644)
(R20430)
Fixture
Clamp
Outdoor heat
exchanger
thermistor
(R20279)
(R3264)
Clip
Thermistor ASSY
(R23500)

PCB Si001410EB
10 Removal Procedure
5. 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 on
the terminal board.
You can remove the PCB
when you disconnect the
lead wires on the terminal
board without removing the
terminal board.
2
3
Remove the earth/
ground screw (lower).
Disconnect all the
terminals from the
terminal board.
4 Cut the clamp.
Terminal board
(R23501)
(R23503)
Earth/ground
screw (lower)
(R23502)
White
RedBlack
Green
(earth/ground)
Clamp
(R20283)

Si001410EB PCB
Removal Procedure 11
5 Remove the 4 screws.
6 Unfasten the 4 hooks
and remove the PCB.
Step Procedure Points
(R20284)
Hook
Hook
(R23504)

Reactor / Partition Plate Si001410EB
12 Removal Procedure
6. Reactor / Partition Plate
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1
2
Remove the screw.
Slide the reactor to the
left and remove the
reactor.
3 Remove the 2 screws.
4 Lift and remove the
partition plate.
When reassembling, fit the 2
lower hooks into the bottom
frame.
Reactor
(R22676)
(R20650)
Partition plate
Hook (R23505)

Si001410EB Sound Blankets
Removal Procedure 13
7. 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
2
Remove the sound
blanket (top).
Remove the sound
blanket (outer).
Since the piping ports are
torn easily, remove the
sound blankets carefully.
The design of the sound
blankets varies depending
on the model.
Some models have the
sound blanket (top inner).
3 Remove the sound
blanket (inner).
4 Remove the sound
blanket (bottom).
(R20737)
Sound blanket
(outer)
Sound blanket (top)
Sound blanket
(inner)
(R20637)
Sound blanket
(bottom)
(R20638)

Electronic Expansion Valve Si001410EB
14 Removal Procedure
8. 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 Remove the terminal
cover.
Terminal
cover
(R20639)

Si001410EB Electronic Expansion Valve
Removal Procedure 15
2
3
Disconnect the lead
wires of the compressor
and the overload
protector.
Remove the protection
bushing.
4 Pull out the electronic
expansion valve coil.
5
6
7
Remove the putties, if
any.
Heat up the 2 brazed
parts and withdraw the
piping with pliers.
Remove the electronic
expansion valve.
Step Procedure Points
Protection bushing
Overload
protector
V (yellow)
W (blue)
U (red)
(R22677)
Electronic
expansion
valve coil
(R20641)
Brazed part
Brazed part
(R20738)

Compressor Si001410EB
16 Removal Procedure
9. 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.
Terminal
cover
(R20639)

Si001410EB Compressor
Removal Procedure 17
2
3
Disconnect the lead
wires of the compressor
and the overload
protector.
Remove the protection
bushing.
4
5
6
7
Remove the putties, if
any.
Heat up the 2 brazed
parts and disconnect
the pipings.
Remove the 3 nuts of
the compressor.
Lift up the compressor
and remove it.
Step Procedure Points
Protection bushing
Overload
protector
V (yellow)
W (blue)
U (red)
(R22677)
Nut (R22592)

Revision History
Month / Year Version Revised contents
08 / 2014 Si001410E First edition
12 / 2015 Si001410EA Model addition: RKM25/35QRV16, RKMA25/35QRV16, RKMD25/35QRV16
07 / 2016 Si001410EB Model addition: RKM25/35RRV16, RKMA25/35RRV16, RKMD25/35RRV16,
RKP25/35RRV16, RKPA25/35RRV16, RKPD25/35RRV16