Daikin R125LUY1 User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Outdoor Unit
Non-Inverter
Pair Type
3/4/5/6 HP Class
Si241312

Service Manual
Removal Procedure
Outdoor Unit
Applicable Models
zCooling Only
R71LUY1
R100LUY1
R125LUY1
R140LUY1

Si241312
Removal Procedure 1
Table of Contents
1. Procedure to Remove Outside Panels....................................................2
2. Procedure to Remove Switch Box ..........................................................3
3. Procedure to Remove Propeller Fan and Fan Motor ..............................4
4. Procedure to Remove PCB Assy............................................................5
5. Procedure to Remove Thermistor ...........................................................6
6. Procedure to Remove Electronic Expansion Valve
and Low Pressure Sensor.......................................................................7
7. Procedure to Remove Compressor.........................................................8

Procedure to Remove Outside Panels Si241312
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
1Pull the lower part (7
positions) of suction
grille to your side and
disengage 3 hooks in
its upper side, then pull
down the entire grille to
remove it.
2To remove the front
panel (front part of the
side panel), dismount 1
screw, and pull down
the panel.
3To remove the top
panel, dismount 8
screws.
4Dismount 1 screw to
remove the front panel
of piping cover.
5Dismount 4 screws to
remove the side panel
of piping cover.
6Dismount 7 screws to
remove the rear part of
the side panel.
Top panel
Suction grille
Piping cover side panel
Piping cover front panel
Rear part of
side panel
Front
panel
Front
panel

Si241312 Procedure to Remove Switch Box
Removal Procedure 3
2. Procedure to Remove Switch Box
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
Removing top panel and
front panel according to
the “Procedure to
Remove Outside Panels”.
1Spread the lower parts
of hooks (3 locations) to
remove the resin cover.
2Remove following
connectors, fastening
terminal from
compressor terminals
and thermistors
according to “Removal
of Thermistor”.
X14A, X15A, X11A,
X12A, X22A, X10A,
X25A
3Dismount 2 screws (∗)
fixing the switch box.
4To remove the switch
box, pull the box
frontward before slide
the left side upward.
Resin cover
Fixing screws (∗)
Hooking parts
Switch box
Hooks
(3 locations)

Procedure to Remove Propeller Fan and Fan Motor Si241312
4Removal Procedure
3. Procedure to Remove Propeller Fan and 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
Removing front panel and
top panel according to the
“Procedure to Remove
Outside Panels”.
1. Removing propeller fan
1Dismount four screws
fixing discharge grille
and disengage 4 hooks
located at upper and
lower sides of the grille
to remove the grille.
2Remove fan stopper
and washer faced nut
fixing propeller fan.
2. Removing the fan motor
1Disconnect the
connector (∗) for fan
motor from the PCB.
(∗)Connector number
R71, 100LU:
X11A, X15A
R125~140LU:
X11A, X12A, X14A,
X15A
Do not pull the lead wire but
hold the connector and press
the hook section when
disconnect the connector.
Precautions for installing
motor
Be sure to fix the motor lead
wire with clampers, or the
lead wire could be caught
with fan resulting damage of
parts.
2Pull out the fastening
terminal from capacitor
(C1R).
3The lead wires are
clamped at 3 locations.
(1 with tie wrap and two
with hooks of partition
plate)
4Dismount 3 screws for
the front panel, and pull
the lead wires to
separate from other
parts.
5Fan motor can be
removed by removing 4
fixing bolts.
Propeller fan
Hooks
Hooks
Fan stopper
Washer faced nut
Capacitor
(C1R)
Clamps
Fan motor
Screws
(3 pieces)
Lead wire Propeller fan

Si241312 Procedure to Remove PCB Assy
Removal Procedure 5
4. Procedure to Remove PCB Assy
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
Removing top panel, front
panel and side panel
according to the
“Procedure to Remove
Outside Panels”.
1Spread the lower parts
of hooks (3 locations) to
remove the resin cover.
2Disconnect all
connectors on the PCB.
3Disconnect 1 screw to
remove the PCB assy.
Claws
Resin cover
Screw
(1 piece)
Glass tube fuse
PCB assy
O F F
1
EMG. DS1
HAP
OFF
HEAT
J1
ON
COOL
234
Dip switch 1 (DS 1)
BS button
HAP Service Monitor LED
Jumper wire
FORCED
DEF,
PUMP
DOWN

Procedure to Remove Thermistor Si241312
6Removal Procedure
5. Procedure to Remove Thermistor
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
Removing top panel, front
panel and side panel
according to the
“Procedure to Remove
Outside Panels”.
1Pick up and pull out the
mounting spring to
remove the discharge
pipe thermistor.
2To remove the heat
exchanger thermistor,
pull the locking piece
frontward.
3To remove the outdoor
air thermistor, draw out
frontward and slide it
rightward.
Outdoor air thermistor
Heat exchanger thermistor
Discharge pipe thermistor
(Inside of muffler)
For R71,100LU
and RY125~140LU
Discharge pipe thermistor
(Side of discharge pipe)
For RY71,100LU
and R125~140LU

Si241312 Procedure to Remove Electronic Expansion Valve and Low Pressure Sensor
Removal Procedure 7
6. Procedure to Remove Electronic Expansion Valve
and Low Pressure Sensor
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
Removing the parts of
outside panel and the
switch box according to
the “Procedure to
Remove Outside Panels”.
Check that the refrigerant is
completely discharged
before starting the
disassembling work.
1. Removing electronic
expansion valve
1Pull up the electronic
expansion valve coil.
2To remove the
electronic expansion
valve, disconnect 2
brazed joints for each
valve.
2. Removing the low
pressure switch
Cover the other piping with
sheet for welding work or
steel sheet to prevent the
piping from influence of torch
flame.
Caution
When installing, use torch
flame while cool the valve
body with wet cloths or the
like to keep it below 120°C.
1Disconnect 1 brazed
joint to remove the low
pressure switch.
Electronic
expansion
valve
Low
pressure
switch
Electronic
expansion
valve coil

Procedure to Remove Compressor Si241312
8Removal Procedure
7. 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
Removing the parts of
outside panel and the
switch box according to
the “Procedure to
Remove Outside Panels”.
Compressor for R71~100
Compressor for R125~140
Check that the refrigerant is
completely discharged
before starting the
disassembling work.
Color of terminal end
R71~100LU
R125~140LU
1 of compressor fixing nuts
is outside of the partition
plate.
Caution
For R125~140LU;
It may cause catching fire on
oil to use torch flame for
disconnecting the brazed
joint before cut the pipes
with pipe cutter.
1Dismount 5 screws to
remove the stop valve
mounting plate.
2Disconnect the gas
piping and the liquid
piping.
3To remove the terminal
cover, press the
protruded section on
both right and left sides.
4Disconnect the lead
wires from the
terminals.
5Remove the sound
insulation (1) and (2).
6Dismount the 4 (∗) nuts
fixing the compressor.
∗3 nuts in the case of
R125~140LU
7Disconnect 2 (∗) brazed
joints.
∗In the case of R125-
140LU;
Cut the suction and
discharge pipe with
pipe cutter before
disconnect the
brazed joints (See
“Caution” in this
page.)
8Lift and take out the
compressor.
Sound insulation (1)
Sound
insulation (2)
Stop valve
mounting plate
Brazed joints
(2 joints)
Compressor
fixing nuts
Compressor
fixing nuts
Cutting position
(Suction pipe)
Cutting position
(Discharge pipe)
T3 (Blue)
T2
(White)
T1 (Red)
W (Blue)
U
(Red)
V
(White)