Daikin RKM33NV2S User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Outdoor Unit
Inverter
Pair Type
6.0/7.0/7.1/8.0/8.5/9.0 kW Class
33000 Btu/h Class
Si001272EC

Service Manual
Removal Procedure
Outdoor Unit
zCooling Only zHeat Pump
RKM33NV2S RXM71NVLT
RXM80NVLT
RKS33JV2S RXM90NVLT
RKS85HVM RXS60KBVMA
RKS85JVMG RXS70MVLT
RXS80MVLT
RKS70MVLT RXS90MVLT
RKS80MVLT
RKS90MVLT

Si001272EC
Removal Procedure 1
Table of Contents
1. Outer Panels ...........................................................................................2
2. Electrical Box ..........................................................................................7
3. PCBs .....................................................................................................10
4. Fan Motor..............................................................................................12
5. Coils / Thermistors ................................................................................13
6. Sound Blankets .....................................................................................15
7. Compressor...........................................................................................16
Note: The illustrations may be slightly different depending on the model.
The illustrations are for heat pump models as representative.

Outer Panels Si001272EC
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 suction grille. The hooks are secured in
the clearances of the
outdoor heat exchanger fins.
1
2
Unfasten the 3 hooks at
the top.
Unfasten the 3 hooks at
the middle.
3 Unfasten the 3 hooks at
the bottom and remove
the suction grille.
2. Remove the top and right
side panels.
1
2
Remove the 9 screws,
and then the top panel.
Remove the 5 screws
on the right side panel.
3
4
Slide the right side
panel downward to
unfasten the 2 hooks on
the back side.
Remove the right side
panel.
(R16619)
Suction grille
(R9587)
Top panel
Right
side
panel
(R18690)
Hook
(R18072)

Si001272EC Outer Panels
Removal Procedure 3
3. Remove the front panel
(2).
1
2
Remove the screw.
Slide the front panel (2)
downward to unfasten
the 3 hooks.
3 Remove the front panel
(2).
4. Remove the front panel
(1).
Remove the discharge grille
and the outdoor fan before
removing the front panel (1).
1
2
Remove the 4 screws
on the discharge grille.
Pull the bottom of the
discharge grille and
remove it.
3 Remove the nut, and
then the outdoor fan.
Nut size: M8
When reassembling, align
the mark of the outdoor
fan with the D-cut section of
the motor shaft.
Step Procedure Points
Front
panel (2)
Hook
(R23986)
(R16718)
Discharge grille
Front panel (1)
(R18039)
(R18880)
Outdoor fan
13 mm
(0.51 inch)
(R18965)

Outer Panels Si001272EC
4Removal Procedure
4
5
Remove the 5 screws
on the front side.
Remove the screw at
the bottom of the left
side.
6 Remove the screw at
the bottom of the back
side.
7 Release the hook and
remove the front panel
(1).
Step Procedure Points
(R18040)
(R9602)
(R24010)
Front panel (1)

Si001272EC Outer Panels
Removal Procedure 5
5. Remove the rear panel.
1
2
Remove the 2 screws
on the partition plate
(2).
Lift up slightly and
remove the partition
plate (2).
3 Remove the 3 screws,
and then the wire
fixture.
4
5
Remove the 7 screws
of the terminal block.
Detach the connecting
wire and the power
supply wire.
6Remove the 5 screws. When the unit has an
auxiliary heat exchanger,
remove the 4 screws.
Step Procedure Points
Rear panel
Partition
plate (2)
(R16720)
(R18882)
Wire
fixture
Connecting wire
Power supply wire
Terminal block
(R23987)
Rear panel
(R18043)
Rear panel
(R18883)
Auxiliary heat
exchanger

Outer Panels Si001272EC
6Removal Procedure
7
8
Remove the screw on
the stop valve mounting
plate.
Lift the rear panel
upward to unfasten the
2 hooks.
9 Release the hooks on
the inner-side of the
rear panel and detach
the outdoor
temperature thermistor
holder.
10 Remove the rear panel.
Step Procedure Points
(R18073)
Hook
Stop valve
mounting plate
Outdoor temperature thermistor holder
Inner side of the rear panel
(R23988)
Rear panel (R16640)

Si001272EC Electrical Box
Removal Procedure 7
2. 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 Remove the screw on
the partition plate (1).
2
3
Remove the screw on
the stop valve mounting
plate.
Remove the 2 screws
to detach the earth/
ground wires.
4
5
Disconnect the
connector [S70].
Release the 4 clamps
attached to the
electrical box.
[S70]: fan motor
When reassembling, insert
each clamp into the hole.
Some models do not have a
harness for four way valve
coil.
Partition plate (1)
(R16917)
Earth/ground
wire
Stop valve
mounting plate (R18969)
[S70]
(R23989)
For the electronic
expansion valve coil
harness
For the thermistor
ASSY harnesses
For the four way
valve coil
harness
For the fan
motor harness
(R23990)

Electrical Box Si001272EC
8Removal Procedure
6 Release the fan motor
lead wire.
★: When reassembling, do not
use these 3 hooks.
7 Disconnect the
connectors [S20], [S80]
and [S90].
[S20]: electronic expansion
valve coil
[S80]: four way valve coil
[S90]: thermistors
The cooling only models do
not have a harness for [S80].
8 Pull out the clamp and
release the compressor
lead wire from the
partition plate (1).
9 Disconnect the relay
connector for the
overload protector and
the compressor.
Step Procedure Points

(R18249)
Fan motor lead wire
[S20] [S90] [S80]
(R9622)
(R24011)
Clamp
Partition
plate (1)
(R9625)

Si001272EC Electrical Box
Removal Procedure 9
10
11
Release the thermistor
harness from the hook
at the bottom of
electrical box.
Pull out the clamp of the
thermistor harness from
the hole of the electrical
box.
12
13
Slide the electrical box
leftward to unfasten the
hook.
Lift up and remove the
electrical box.
Step Procedure Points
Fixing position for the
thermistor harness
Hook
(R23991)
When reassembling, insert
the clamp into the hole.
Hook
Electrical box
(R23992)

PCBs Si001272EC
10 Removal Procedure
3. 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 cover of
the electrical box.
Release the 4 hooks
indicated by ▼.
2 Disconnect the
connectors [S52] and
[S102] from the service
monitor PCB.
[S52], [S102]: main PCB
3 Detach the 4 clamps
with pliers and remove
the service monitor
PCB.
4
5
Remove the screws of
the terminal board and
the earth/ground wire.
Unfasten the hook on
the right.
Cover
(R9611)
(R6427)
Service monitor PCB
[S52] [S102]
(R16707)
Clamp
(R16708)
Terminal board
Earth/ground
wire
Hook
(R23993)

Si001272EC PCBs
Removal Procedure 11
6
7
Open the terminal
board.
Disconnect the
harnesses.
1: Black
2: White
3: Red
L1: Black
L2: Brown
N1: White
N2: Blue
8 Disconnect the 2
harnesses for the
reactor [HR1] and
[HR2].
[HR1] : white
[HR2] : blue
The harness for [HR2] has a
ferrite core.
9
10
Remove the 3 screws
of the main PCB.
Release the 4 hooks.
11 Lift up and remove the
main PCB.
Step Procedure Points
(R18053)
12 3 L1N1
N2
L2
[HR1] [HR2] Ferrite core
(R5286)
(R18054)
Hook Hook
(R5289)
Main PCB

Fan Motor Si001272EC
12 Removal Procedure
4. 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 2 clamps.
2
3
Remove the 2 bottom
screws.
Remove the 2 top
screws.
Be sure to remove the
bottom screws first. If the top
screws are removed first, the
fan motor may tilt down or
fall and cause injury.
4 Remove the fan motor. When reassembling, make
sure that the wire harness is
facing downward.
(R9630)
Top screw
Bottom screw
(R24012)
Fan motor
(R6443)
Harness
(R6444)

Si001272EC Coils / Thermistors
Removal Procedure 13
5. Coils / Thermistors
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 electronic
expansion valve coil.
1 Pull out the electronic
expansion valve coil.
2. Remove the thermistors. The position of the outdoor
heat exchanger thermistor
varies depending on the
model.
Be careful not to lose the clip
for the thermistor.
1 Pull out the outdoor
heat exchanger
thermistor.
2
3
Slightly open the sound
blanket (outer).
Remove the sound
blanket (top upper).
You can remove the
thermistors without removing
the electrical box.
(1) Disconnect [S90] from the
electrical box (main PCB).
(2) Release the thermistor
harness from the hook at the
bottom of electrical box.
(3) Pull out the clamp of the
thermistor harness from the
hole of the electrical box.
The design of the sound
blankets varies depending
on the model.
Electronic
expansion
valve coil
(R9631)
Outdoor heat exchanger thermistor
(R17236)
(R22516)
Clip
Sound blanket
(top upper) Sound blanket
(outer)
(R18075)

Coils / Thermistors Si001272EC
14 Removal Procedure
4 Remove the discharge
pipe thermistor.
Be careful not to lose the
fixtures for the thermistors.
5 At the back side, open
the outdoor
temperature thermistor
holder.
6 Release the outdoor
temperature thermistor.
3. Remove the four way
valve coil.
The cooling only models
have no four way valve coil.
1 Remove the screw, and
then the four way valve
coil.
Step Procedure Points
(R9635)
Discharge pipe thermistor
Fixture
(R21395)
Outdoor temperature thermistor holder
(R9636)
Outdoor temperature thermistor (R9637)
(R18076)
Four way valve coil

Si001272EC Sound Blankets
Removal Procedure 15
6. 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
Open the sound blanket
(outer).
Remove the sound
blanket (top upper).
The sound blanket is fragile.
Pass the discharge pipe
through it carefully.
The design of the sound
blankets varies depending
on the model.
Since piping ports are torn
easily, remove the sound
blanket carefully.
3
4
Remove the screw and
slightly push the
partition plate (1) to the
left for easy work.
Remove the sound
blanket (outer).
5 Remove the sound
blanket (inner).
The sound blanket is fragile.
Be careful of the notches of
the compressor mount (4
locations).
(R18077)
Sound blanket
(outer)
Sound blanket
(top upper)
Partition plate (1)
Sound blanket
(outer)
(R18055)
Sound blanket
(inner)
Compressor mount
(R23998)

Compressor Si001272EC
16 Removal Procedure
7. 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
(R9650)

Si001272EC Compressor
Removal Procedure 17
2
3
Pull out the 3
compressor lead wires.
Remove the overload
protector (OL).
4 Heat up the 2 brazed
parts and withdraw the
pipings with pliers.
Some models have putties.
Make sure to remove the
putties beforehand.
5
6
Remove the 3 nuts.
Remove the
compressor.
Step Procedure Points
W (blue)
U (red)
V (yellow)
OL
(R9471)
(R9646)
(R7021)

Revision History
Month / Year Version Revised contents
11 / 2012 Si001272 First edition
04 / 2013 Si001272_A Model addition: RKS33JV2S, RKS85HVM, RKS85JVMG, RK(X)S70/80/90MVLT
08 / 2015 Si001272EB Model addition: RKM33NV2S, RXM71/80/90NVLT
09 / 2016 Si001272EC Correction of errors