Daikin R21NUV1 User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Outdoor Unit
Non-Inverter
Pair Type
2.5 HP Class
Si241307

Service Manual
Removal Procedure
Outdoor Unit
Applicable Models
zCooling Only
R21NUV1

Si241307
Removal Procedure 1
Table of Contents
1. Procedure to Remove Outside Panels....................................................2
2. Procedure to Remove El. Compo. Box ...................................................3
3. Procedure to Remove Compressor.........................................................6

Procedure to Remove Outside Panels Si241307
2Removal Procedure
1. Procedure to Remove Outside Panels
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
1To dismount the top
panel, remove the 4
mounting screws (A).
2To dismount the front
panel, remove the 6
mounting screws (B).
3To dismount the service
cover, remove the 2
mounting screws.
4To dismount the side
panel, remove the 6
mounting screws.
Interconnecting
wire terminal
Power supply
terminal
Earth terminal
Top panel
(A)
Service cove
r
Side panel
(B)
Front panel
(B)
(B)
(A)
(A)
(A)
(B)
(B)
(B)
(C)
(C)
(C)
(C)(C)
Side plate

Si241307 Procedure to Remove El. Compo. Box
Removal Procedure 3
2. Procedure to Remove El. Compo. Box
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
1Remove the wire
harness connectors
from the PCB.
2Dismount the outdoor
air thermistor and the
heat exchanger
thermistor.
Attach to the 3rd
row of heat
exchanger pipe at
30mm from the left
end.
Route thermistor
wire through the
specified section to
prevent wire pinching.
Thermistor
Thermistor retaining spring

Procedure to Remove El. Compo. Box Si241307
4Removal Procedure
Step Procedure Points
Terminal code is printed. Do
not scorch the indication with
the flame of welder.
Also record terminal code
ON a memo paper in case
the indication becomes
illegible.
Connect the lead wires to
the proper fasten terminals.
S….Yellow
M….Red
C….Blue
3Remove the terminal
cover.
4Remove the
compressor protective
device and the 3
terminals together with
the mounting plate.
S yellow M red
C blue
Blue Yellow
Red

Si241307 Procedure to Remove El. Compo. Box
Removal Procedure 5
Step Procedure Points
5Remove the screw.
6Take off the el. compo.
box.

Procedure to Remove Compressor Si241307
6Removal Procedure
3. Procedure to Remove Compressor
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
Make sure that refrigerant
is completely empty in the
circuit before
disassembling. Warning
If refrigerant gas leaks during
servicing work, ventilate the
area. (If refrigerant gas
contacts flames, hazardous
gas can be generate.)
1Disconnect the suction
pipe and the discharge
pipe of the compressor
at brazed sections.
Discharge
pipe
Suction pipe

Si241307 Procedure to Remove Compressor
Removal Procedure 7
Step Procedure Points
2After disconnecting the
refrigerant pipes,
remove the 3 washer
nuts that secure the
compressor. Use open-
end washer nut (a)
located on the right
front side.
3Use T-handle box
wrench to loosen the
nuts (b) and (c).
(a)
(c)
(b)
Open-end
wrench
T-handle box wrench

Revision History
Month / Year Version Revised contents
01 / 2013 Si241307 First edition