Daikin McQuay RKS25F2V1B User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Outdoor Unit
Inverter
Pair Type
2.5/3.5 kW Class
Si00-771

Service Manual
Removal Procedure
Outdoor Unit
zCooling Only zHeat Pump
RKS25F2V1B RXD25FAV2C
RKS35F2V1B RXD35FAV2C
RXD25FV2C
RXD35FV2C
RXS25F2V1B
RXS35F2V1B
RXS25FV2C
RXS35FV2C

Si00-771
Removal Procedure 1
Table of Contents
1. Removal of Outer Panels / Fan Motor.....................................................2
2. Removal of Electrical Box .....................................................................10
3. Removal of PCB....................................................................................13
4. Removal of Reactor / Partition Plate .....................................................15
5. Removal of Sound Blankets..................................................................16
6. Removal of Four Way Valve .................................................................17
7. Removal of Compressor .......................................................................19
Note: The illustrations may be slightly different depending on the model.
The illustrations are for heat pump models as representative.

Removal of Outer Panels / Fan Motor Si00-771
2Removal Procedure
1. Removal of Outer Panels / Fan Motor
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
1. Appearance features
Take care not to cut your
finger by the fins of the
outdoor heat exchanger.
2. Remove the panels.
The stop valve cover is
united with the shield plate.
When reassembling, make
sure to fit the 5 hooks.
1Remove the screw of
the stop valve cover.
Pull the stop valve
cover downward and
remove it.
(R7186)
(R11890)
Stop
valve
cover
(R7188)
Shield plate
Hook
(R13504)

Si00-771 Removal of Outer Panels / Fan Motor
Removal Procedure 3
2Remove the 3 screws
and lift the top panel.
3Remove the drip proof
plate.
4Remove the 4 screws
and remove the
discharge grille.
The discharge grille has 4
hooks.
Step Procedure Points
Top panel
(R7190)
(R7191)
Drip proof plate
(R7192)
Discharge
grille
(R7193)

Removal of Outer Panels / Fan Motor Si00-771
4Removal Procedure
5Remove the 8 screws
of the front panel.
6Unfasten the hooks.
Pull and remove the
front panel.
The front panel has 4 hooks.
3. Remove the fan motor. Nut size: M6
1Remove the nut of the
outdoor fan.
Step Procedure Points
(R7194)
Front panel
(R17125)
Hook
(R16462)
Outdoor fan
10 mm
(R12236)

Si00-771 Removal of Outer Panels / Fan Motor
Removal Procedure 5
2Remove the outdoor
fan.
When reassembling, align
the mark of the outdoor
fan with the D-cut section of
the motor shaft.
3Cut the clamp.
4Disconnect the
connector for the fan
motor [S70].
5Release the fan motor
lead wire from the hook.
Step Procedure Points
D-cut
(R7197)
(R7198)
[S70]
(R7199)
Fan motor
lead wire
(R16463)

Removal of Outer Panels / Fan Motor Si00-771
6Removal Procedure
6Remove the screw and
remove the fan motor
fixing frame.
When reassembling, fit the
lower hooks into the bottom
frame.
Step Procedure Points
(R17052)
Fan motor fixing frame
(R17053)
(R7206)

Si00-771 Removal of Outer Panels / Fan Motor
Removal Procedure 7
7Open 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 so
as not to be entangled with
the outdoor fan.
8Remove the 4 screws
and remove the fan
motor.
4. Remove the right side
panel.
1Remove the 2 screws
on the rear side.
Step Procedure Points
(R11835)
(R3249)
Lead wire Outdoor fan
(R17133)
Fan motor
(R7207)

Removal of Outer Panels / Fan Motor Si00-771
8Removal Procedure
2Release the outdoor
temperature thermistor.
3Lift up the guard net
and remove it.
4Remove the 4 screws
on the right side panel.
Step Procedure Points
(R7208)
Outdoor temperature thermistor
Guard net
(R7209)
(R7210)
Right side panel

Si00-771 Removal of Outer Panels / Fan Motor
Removal Procedure 9
5Remove the screw near
the stop valves.
6Unfasten the hook on
the rear side.
When reassembling, make
sure to fit the hook.
7Lift up the right side
panel and remove it.
When reassembling, make
sure to fit the hook.
Step Procedure Points
(R16467)
(R7212)
(R16468)
Hook

Removal of Electrical Box Si00-771
10 Removal Procedure
2. Removal of Electrical Box
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
1Disconnect the 2
connectors for the
reactor.
Preparation
Remove the outer panels
and disconnect the
connector for the fan motor
according to the “Removal of
Outer Panels / Fan Motor”.
2Cut the clamp. Some models do not have
the clamp.
3Disconnect the
connector for the
compressor [S30].
When reassembling, coil the
excessive lead wire and
hang the loop on the hook.
(R16469)
(R16470)
(R7216)
[S30]

Si00-771 Removal of Electrical Box
Removal Procedure 11
4Disconnect the
connector for the
overload protector
[S40].
5Disconnect the
connector for the
electronic expansion
valve coil [S20].
When reassembling,
connect the connectors in
the following order.
(1) [S80]
(2) [S20]
(3) [S40]
(4) [S30]
(5) reactor
6Disconnect the
connector for the four
way valve coil [S80].
The cooling only models do
not have the harness for
[S80].
7Release the discharge
pipe thermistor.
Be careful not to lose the
clip for the thermistor.
Step Procedure Points
(R7217)
[S40]
(R7218)
[S20]
(R7219)
[S80]
(R16457)
Discharge pipe thermistor
(R12279)
Clip

Removal of Electrical Box Si00-771
12 Removal Procedure
8Cut the clamp.
9Pull out the outdoor
heat exchanger
thermistor.
Be careful not to lose the
clip for the thermistor.
10 Lift and remove the
electrical box.
Step Procedure Points
(R16471)
(R16472)
Outdoor heat exchanger
thermistor
(R3264)
Clip
(R16473)
Electrical Box

Si00-771 Removal of PCB
Removal Procedure 13
3. Removal of PCB
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
1Feature of the main
PCB
You can remove the main
PCB when you disconnect
the lead wires on the
terminal board without
removing the electrical box.
2Remove the screw on
the terminal board.
3Remove the 2 screws
and detach the earth
wires.
(R16482)
(R7256)
Terminal
board
(R17134)
Earth
wire

Removal of PCB Si00-771
14 Removal Procedure
4Remove the 4 screws.
5
6
Unfasten the 3 hooks
on the upper side.
Lift and pull out the
main PCB.
[S20]: electronic expansion
valve coil
[S30]: compressor
[S40]: overload protector
[S70]: fan motor
[S80]: four way valve coil
[S90]: thermistors
Step Procedure Points
(R16484)
Screw
(R16485)
(R17615)
[S80][S20]
[S90][S30]
[S10]
[S40]
[S70]

Si00-771 Removal of Reactor / Partition Plate
Removal Procedure 15
4. Removal of Reactor / Partition Plate
Procedure 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 reactor. Preparation
Remove the outer panels
according to the “Removal
of Outer Panels / Fan
Motor”.
Remove the electrical box
according to the "Removal
of Electrical Box".
1Remove the screw and
remove the reactor.
2. Remove the partition
plate.
1Remove the 2 screws.
2The partition plate has
2 hooks on the lower
side. Lift and pull the
partition plate to
remove.
When reassembling, fit the
lower hooks into the bottom
frame.
(R16474)
Reactor
(R7225)
(R16475)
Partition plate
Hook (R17054)

Removal of Sound Blankets Si00-771
16 Removal Procedure
5. Removal of Sound Blankets
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
1Open the sound blanket
(outer).
Preparation
Remove the outer panels
according to the “Removal
of Outer Panels / Fan
Motor”.
Remove the electrical box
according to the "Removal
of Electrical Box".
2Lift and remove the
sound blanket (outer).
Since the piping ports are
torn easily, remove the
sound blanket carefully.
3Remove the sound
blanket (top).
4Open and pull the
sound blanket (inner)
out.
(R7229)
Sound blanket (outer)
(R17135)
(R7231)
Sound blanket
(top)
(R7232)
Sound blanket (inner)

Si00-771 Removal of Four Way Valve
Removal Procedure 17
6. Removal of Four Way Valve
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
1Pull out the electronic
expansion valve coil.
2Remove the terminal
cover.
3Disconnect the lead
wires of the
compressor.
4Remove the screw and
remove the four way
valve coil.
The cooling only models do
not have a four way valve
coil.
Electronic
expansion
valve coil
(R7233)
Terminal cover
(R7234)
V
W
U
Red (U)
Yellow (V) Blue (W)
(R7235)
Four way valve coil
(R7247)

Removal of Four Way Valve Si00-771
18 Removal Procedure
5Remove the sheets of
putty. Warning
Be careful not to get yourself
burnt with the pipes and other
parts that are heated by the
gas brazing machine.
Warning
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.
Cautions for restoration
1. Restore the piping by non-
oxidation brazing.
2. It is required to prevent the
carbonization of the oil inside
the four way valve and the
deterioration of the gaskets
affected by heat. (Keep
below 120°C.) For the sake
of this, wrap the four way
valve with wet cloth and
provide water so that the
cloth does not dry.
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.
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.
6Heat up the brazed part
and withdraw the piping
with pliers.
Note:
Never use a metal
saw to cut pipes
because the
sawdust may enter
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.
Step Procedure Points
(R7248)
Four way valve
(R7249)
(R7250)