Daikin RXN25KEV1B User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
2.5/3.5 kW Class
Outdoor Unit
Inverter
Pair Type
Si001161

Service Manual
Removal Procedure
Outdoor Unit
Applicable Models
zHeat Pump
RXN25KEV1B
RXN35KEV1B
RXN425KC
RXN435KC

Si001161
Removal Procedure 1
Table of Contents
1. Removal of Outer Panels ........................................................................2
2. Removal of Outdoor Fan / Fan Motor .....................................................4
3. Removal of Electrical Box / PCB.............................................................6
4. Removal of Sound Blankets..................................................................14
5. Removal of Four Way Valve .................................................................16
6. Removal of Compressor .......................................................................19
Note: The illustrations may be slightly different depending on the model.

Removal of Outer Panels Si001161
2Removal Procedure
1. Removal of Outer Panels
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 3 hooks.
1Remove the screw of
the stop valve cover.
Pull down the stop
valve cover and remove
it.
(R10707)
(R15858)
(R10709)
Stop valve
cover
(R14606)
Shield plate
Hook

Si001161 Removal of Outer Panels
Removal Procedure 3
2Remove the 3 screws
(right: 1 screw, left: 2
screws) and remove the
top panel.
3Remove the 5 screws
of the front panel.
4Lift up the left side and
unfasten the hooks.
5Unfasten the right side
hooks and remove the
front panel.
6
7
Remove the 4 screws
of the discharge grille.
Unfasten the 6 hooks
and remove the
discharge grille.
Step Procedure Points
(R10711)
Top panel
Front panel
(R10712)
(R10713)
(R10714)
Discharge grille

Removal of Outdoor Fan / Fan Motor Si001161
4Removal Procedure
2. Removal of Outdoor Fan / 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. Remove the outdoor fan. Preparation
Remove the panels
according to the “Removal
of Outer Panels”.
Nut size: M6
1
2
Remove the nut of the
outdoor fan.
Remove the outdoor
fan.
When reassembling, align
the mark of the outdoor
fan with the D-cut section of
the motor shaft.
2. Remove the fan motor. [S70]: fan motor
When reassembling, set the
fan motor lead wire into the
hook.
1
2
Disconnect the
connector for the fan
motor [S70].
Release the fan motor
lead wire from the hook.
3Release the fan motor
lead wire from the 3
hooks.
When reassembling set the
fan motor lead wire into the
3 hooks.
(R17480)
Shaft
D-cut
Nut
Mark
Outdoor fan
10 mm
(R12236)
[S70] Hook Fan motor
lead wire
(R14491)
(R14492)

Si001161 Removal of Outdoor Fan / Fan Motor
Removal Procedure 5
4Remove the screw and
remove the fan motor
fixing frame.
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.
5Release the fan motor
lead wire from the
hooks.
When reassembling, set the
clamped position under the
lower hook of the fan motor
fixing flame.
6Remove the 3 screws
and remove the fan
motor.
Step Procedure Points
Fan motor fixing frame
(R15874)
(R3249)
Lead wire Outdoor fan
(R14494)
Clamp
(R14495)
Fan motor

Removal of Electrical Box / PCB Si001161
6Removal Procedure
3. Removal of Electrical Box / PCB
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 PCB. Preparation
Remove the panels
according to the “Removal
of Outer Panels”.
Some models have another
wiring for outdoor power-
receiving system.
1Remove the screws
and release the
connecting wire.
2Remove the 3 screws
and remove the wire
clamp.
3
4
Disconnect the
connector for the fan
motor [S70].
Release the fan motor
lead wire from the hook.
[S70]: fan motor
5Release the fan motor
lead wire from the 3
hooks.
(R17481)
Connecting wire
(R15875)
Wire
clamp
[S70] Hook Fan motor
lead wire
(R14491)
(R14492)

Si001161 Removal of Electrical Box / PCB
Removal Procedure 7
6Remove the screw on
the rear side of the right
side panel.
7Remove the 4 screws
on the right side panel.
8Unfasten the hook on
the rear side.
When reassembling, make
sure to fit the hook.
9Release the outdoor
temperature thermistor
from the outdoor heat
exchanger.
Step Procedure Points
(R15876)
Right
side
panel
(R14499)
(R14500)
Outdoor
temperature
thermistor (R16052)

Removal of Electrical Box / PCB Si001161
8Removal Procedure
10 Unfasten the hook, and
remove the right side
panel.
11 Pull out the terminals
from the terminal board
except the earth wire.
1 : black, upper
2 : white, lower
3 : red, upper
: green, lower
12 Remove the screw and
release the earth wire.
13 Disconnect the
connector [S80].
[S80]: four way valve coil
The harness of the four way
valve coil and the harness of
the reactor cross each other.
Step Procedure Points
(R14502)
Right
side
panel
Hook
Red
Earth wire
White
(R17482)
Black
(R17483)
Earth wire
(R14505)
[S80]
Reactor