Daikin RKM71PVMA User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
7.1 kW Class
Outdoor Unit
Inverter
Pair Type
Si001422E

Service Manual
Removal Procedure
Outdoor Unit
zCooling Only zHeat Pump
RKM71PVMA RXM71PVMA

Si001422E
Removal Procedure 1
Table of Contents
1. Outer Panels ...........................................................................................2
2. Electrical Box ..........................................................................................7
3. PCB.......................................................................................................10
4. Fan Motor..............................................................................................14
5. Coils / Thermistor ASSY .......................................................................15
6. Sound Blankets .....................................................................................17
7. Compressor...........................................................................................19
Note: The illustrations may be slightly different depending on the model.
The illustrations are for heat pump models as representative.

Outer Panels Si001422E
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
1Unfasten the 2 hooks
on the bottom of the
suction grille.
2Slide downward the
suction grille to
unfasten the upper 3
hooks.
3Remove the suction
grille.
4Remove the 8 screws
and remove the top
panel.
Hook
Suction
grille
Hook (R21473)
(R21474)
Top panel
(R21475)

Si001422E Outer Panels
Removal Procedure 3
5Remove the 5 screws
of the front panel (2).
6Slide downward the
front panel (2) to
unfasten the hook.
When reassembling, make
sure to fit the hook.
7Remove the 2 screws
of the right side panel.
8Slide down the right
side panel and remove
it.
When reassembling, make
sure to fit the 2 hooks.
Step Procedure Points
Front panel (2)
(R21476)
Hook
(R21477)
Right side panel
(R21478)
(R21479)

Outer Panels Si001422E
4Removal Procedure
9Remove 4 screws on
the discharge grille.
Remove the discharge grille
and the outdoor fan first to
remove the front panel (1).
10 Pull the bottom of the
discharge grille.
11 Slide downward the
discharge grille to
unfasten the upper 2
hooks.
When reassembling, make
sure to fit the 4 hooks.
12 Remove the nut and
remove the outdoor fan.
Nut size: M8
When reassembling, align
the Wmark of the outdoor
fan with the D-cut section of
the motor shaft.
13 Remove the 5 screws
of the front panel (1).
Step Procedure Points
Discharge grille
(R21480)
(R21481)
Nut
Outdoor fan
(R21482)
13 mm
(R20767)
(0.51 inch)
Front panel (1)
(R21483) (R21484)

Si001422E Outer Panels
Removal Procedure 5
14 Lift up the front panel
(1) to unfasten the
hook.
15 Remove the front panel
(1).
16 Remove the screw of
the partition plate (2).
17 Slide the partition plate
(2) to the left and lift up
to remove it.
18 Remove the 3 screws
and remove the wire
fixture.
19 Remove the 11 screws
on the terminal boards
and release the demand
communication wire,
connecting wire, power
supply wire.
In case that the demand
adaptor is attached
optionally, remove the
demand adaptor first.
Step Procedure Points
(R21485)
Partition plate (2)
Hook
(R21486)
(R21487)
Wire fixture
Demand
communication
wire Connecting
wire
Power supply
wire
(R21488)
Demand
adaptor
(R21489)

Outer Panels Si001422E
6Removal Procedure
20 Detach the outdoor
temperature thermistor
holder.
21 Release the thermistor
harness from the slit.
22 Remove the 5 screws
and remove the rear
panel.
When reassembling, make
sure to fit the 2 hooks.
Step Procedure Points
Outdoor temperature
thermistor holder
(R21490)
Slit
(R21676)
Rear panel
(R21677)
(R21678)

Si001422E 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
1Remove the 2 screws
and detach the earth /
ground wires.
2Disconnect the
connector [S70].
[S70]: fan motor
3Release the fan motor
lead wire from the slit
and the 5 hooks.
4Disconnect the
connector [S20].
[S20]: electronic expansion
valve coil
5Pull out the clamp and
release the harness.
Terminal board Earth / ground wire
(R21679)
[S70]
(R21680)
Hook
Hook
Slit
(R21681)
[S20] Clamp
(R21682)

Electrical Box Si001422E
8Removal Procedure
6Disconnect the
connector [S90].
[S90]: thermistors
When reassembling, insert
each clamp into the small
holes.
When reassembling, insert
the clamp of the thermistor
ASSY harness into the hole
as below.
7Pull out the clamp and
release the harness.
8Disconnect the
connector [S40].
[S40]: overload protector
9Release the harness
from the hook.
10 Disconnect the
connector [S80].
[S80]: four way valve coil
Cooling only models have no
harness for [S80].
11 Pull out the clamp and
release the harness.
12 Release the thermistor
harness from the hook
on the bottom of the
electrical box.
When reassembling, insert
the clamp into the small
hole.
13 Pull out the clamp.
Step Procedure Points
[S90] Clamp
(R21683) Thermistor ASSY harness
(R21725)
Electronic expansion
valve coil harness
[S40] Hook
(R21684)
[S80]
(R21685)
Clamp
Hook
Clamp
(R21686)
Fixing position for the
thermistor harness
(R21726)

Si001422E Electrical Box
Removal Procedure 9
14 Disconnect the relay
connector for the
compressor and pull out
the clamp.
15 Remove the 2 screws.
16 Lift up and remove the
electrical box.
When reassembling, make
sure to fit the hook.
Step Procedure Points
Clamp
Relay
connector for
compressor (R21687)
(R21688)
Electrical
box
(R21689)
Hook

PCB Si001422E
10 Removal Procedure
3. 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 service
monitor PCB.
1Peel off the filament
tape and open the
electrical box cover.
2Disconnect the
connectors [S2], [S52],
[S102].
[S2]: demand control PCB
[S52] [S102]: main PCB
Cooling only models have no
connector for [S2].
Cooling only models have no
terminal block for smart
meter.
3Release the harness
from the hook and
groove.
In case of cooling models,
the service monitor PCB is
fixed with clamps instead of
the hooks.
Pinch the 4 clamps and
remove the service monitor
PCB.
4Unfasten the 2 hooks
and remove the service
monitor PCB.
Electrical box cover
Filament tape
(R21690)
[S102]
[S52]
[S2]
(R21691)
Terminal block
for smart meter
Hook
(R21692)
Clamp
(R21694)
(R21693)
Service monitor PCB
Hook
Hook

Si001422E PCB
Removal Procedure 11
2. Remove the main PCB.
1Remove the screw on
the terminal block for
smart meter.
Cooling only models have no
terminal block for smart
meter.
2Remove the earth /
ground screw.
3Remove the screw.
4Unfasten the hook on
the right and open the
terminal board cover.
5Pull out all the
terminals.
When reassembling,
connect the connectors as
below.
Cooling only models have no
connector [LA].
[HR1]: reactor (white)
[HR2]: reactor (blue)
The harness for [HR2] has a
ferrite core.
6Pull out the terminals
[HR1], [HR2] from the
main PCB.
Step Procedure Points
Terminal
block for
smart meter
Earth /
ground wire
(R21695)
Hook
(R21696)
(R21697)
1 (black)
L1 (black)
2 (white)
N1 (white)
L2 (brown)
N2 (blue)
LA (black)
LA (white)
3 (red)
(R21698)
[HR1] [HR2]
(R21699)

PCB Si001422E
12 Removal Procedure
7Remove the 3 screws
and unfasten the 4
hooks.
8Lift up and remove the
main PCB.
3. Remove the reactor.
1Remove the 4 screws.
2Remove the reactor.
Step Procedure Points
Hook
Hook
(R21700)
Main PCB
(R21701)
(R21702)
Reactor
(R21703)

Si001422E PCB
Removal Procedure 13
4. Remove the demand
control PCB.
Some models have no
demand controller.
1Remove the 2 screws.
2Lift up and remove the
demand control unit.
3Unfasten the 2 hooks
and open the cover.
4Remove the screw.
5Unfasten the hook and
remove the demand
control PCB.
Step Procedure Points
(R21704)
Demand control unit
(R21705)
Cover
(R21706)
Demand control PCB
Hook
(R21707)

Fan Motor Si001422E
14 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
1Cut the 2 clamps.
2Remove the 2 lower
screws of the fan motor.
Be sure to remove the lower
screws (1) first. If the top
screws (2) are removed first,
the fan motor may tilt down
or fall and cause injury
because its center of gravity
is shifted to the front.
3Then remove the 2
upper screws.
4Remove the fan motor. When reassembling, make
sure that the wire harness is
facing downward.
Clamp
Clamp
(R21708)
(2)
(1)
(R6442)
Fan motor
(R6443)
Harness
(R6444)

Si001422E Coils / Thermistor ASSY
Removal Procedure 15
5. Coils / 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. Remove the electronic
expansion valve coil.
1Pull out the electronic
expansion valve coil.
2. Remove the four way
valve coil.
1Remove the screw.
2Pull out the four way
valve coil.
Electronic
expansion
valve coil
(R21709)
(R21710)
Four way valve coil
(R21711)

Coils / Thermistor ASSY Si001422E
16 Removal Procedure
3. Remove the thermistor
ASSY.
Be careful not to lose the clip
for the thermistor.
1Cut the clamp.
2Pull out the outdoor
heat exchanger
thermistor.
3Slightly open the sound
blanket (outer) and the
sound blanket (top
upper).
Be careful not to lose the
fixture for the thermistor.
4Detach the discharge
pipe thermistor and
remove the thermistor
ASSY.
Step Procedure Points
Clamp
Outdoor heat
exchanger thermistor
(R21712)
Clip
(R3264)
Sound blanket
(top upper)
Discharge pipe
thermistor
Sound blanket
(outer)
(R21713)
Fixture
(R21715)
Thermistor
ASSY
(R21714)

Si001422E Sound Blankets
Removal Procedure 17
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
1Remove the sound
blanket (top upper).
Since the piping ports on the
sound blanket are torn
easily, remove the sound
blanket carefully.
2Remove the sound
blanket (top lower).
3Open the sound blanket
(outer) and remove it.
Sound blanket
(top upper)
(R21716)
Sound blanket
(top lower)
(R21717)
Sound blanket
(outer)
(R21718)

Sound Blankets Si001422E
18 Removal Procedure
4Remove the sound
blanket (inner).
Step Procedure Points
Sound blanket (inner)
(R21719)