Daikin FBQ71DVET User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Indoor Unit
Inverter
Pair Type
3/4/5/6 HP Class
Si281313E

Service Manual
Removal Procedure
Outdoor Unit
Applicable Models
zHeat Pump
FBQ71DVET
FBQ100DVET
FBQ125DVET
FBQ140DVET

Si281313E
Removal Procedure 1
Table of Contents
1. Arrangement of Main Parts .....................................................................2
2. Procedure to Remove Switch Box (Lid) ..................................................3
3. Procedure to Remove PCB.....................................................................4
4. Procedure to Remove Drain Pan ............................................................5
5. Procedure to Remove Fan Motor............................................................6
6. Procedure to Remove Drain Pump and Float Switch..............................8
7. Procedure to Remove Thermistors .........................................................9

Arrangement of Main Parts Si281313E
2Removal Procedure
1. Arrangement of Main Parts
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
The arrangement of main
parts is shown below.
Heat exchanger Discharge air thermistor
Heat exchanger thermistor
Service lid (1)
Service lid (2)
Switch box (lid)
Drain piping joint
Liquid piping joint
Gas piping joint
Fan rotor (1)
Fan rotor (2)
Fan motor
Suction air thermistor
(provided to the side of
EL. compo. box)
Air outlet
(procured locally)
Fan rotor (3)
(except FBQ71)

Si281313E Procedure to Remove Switch Box (Lid)
Removal Procedure 3
2. Procedure to Remove Switch Box (Lid)
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
1. Dismount the switch box
(lid).
<Inside of switch box>
1Remove the 3 screws
of the switch box (lid).
The switch box (lid)
L1R
A2P
A1P
A3P
X9A
X2A
X3A
X6A
X10A
X25A X27A
X16A X70A

Procedure to Remove PCB Si281313E
4Removal Procedure
3. Procedure to Remove PCB
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
Dismount the switch box
lid according to the
removal procedure for the
EL. compo. box lid.
1. Remove the connectors
from all the PCBs,
respectively.
1Remove the connectors
from the PCB (A1P).
2Remove the connectors
from the PCB (A2P).
3Remove the connectors
from the PCB (A3P).
2. Remove each PCB.
1Remove the 3 claws
and extract the PCB
(A1P).
Cross section of mounted
PCB (A1P)
2Remove the following
parts of the PCB (A2P).
Mounting screw×4
3Remove the 4 locking
cards of the PCB (A3P)
(except FHMP50AB).
L1R
A2P
A1P
A3P
X9A X1A
X2A
X25A X28A
X27A
X16A X70A
X30A
X15A X18A X13A
X3A
X6A
X10A
L1R
A2P
A1P
A3P
Locking card spacers
Locking card spacers
Ta b
Locking card spacers
(or mounting screws)
Locking card spacers
(or mounting screws)
PCBTa b
Resin case

Si281313E Procedure to Remove Drain Pan
Removal Procedure 5
4. Procedure to Remove Drain Pan
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
1. Inspect the drain pan. Drain pan inspection through
the service port
Precautions for the removal
and attachment of the
service lid (1)
<Removal>
• Check that the wires are not
twisted or get tangled.
<Attachment>
1. Attach the lid (1) after
checking that the wires are
not twisted or tangled.
2. Check that the wires are not
caught between the lid (1)
and side plate.
3. Open the inspection port
after attachment work, and
check that the wires are not
in contact with or caught by
the float and that the float
operates normally.
(Otherwise, repeat
inspection steps 1 through
3.)
The antibacterial agent can
be removed with a single
screw loosened.
Precautions for the
attachment of the drain pan
• Return the removed screws
to the original positions.
• Mount the drain pan
horizontally. (Check that no
sealing material is peeled
off.)
1Remove the 5 screws
and dismount the
service lid (1).
2Inspect the drain pan
(where water is
gathered).
2. Dismount the drain pan.
1Remove the rubber
plug of the water drain
and discharge water
from the drain pan.
(Securely connect the
rubber plug with an
appropriate tool, such
as a screwdriver, after
water is discharged.)
2Remove the 2 screws
and dismount the drain
socket cover (2).
3Remove the following
(implanted) screws and
dismount the backside
panel.
FBQ71: 11 screws
FBQ100 to 140: 14
screws
4Remove the following
(implanted) screws and
dismount the backside
panel.
FBQ71: 7 screws
FBQ100 to 140: 9
screws
5Dismount the drain pan
right under.
Service port
Service lid
Drain pan
Drain pan
Antibacterial
agent
Water drain hole
Drain pan
Bottom plate
Backside plate
Drain socket cover (2)
Screw

Procedure to Remove Fan Motor Si281313E
6Removal Procedure
5. Procedure to Remove 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
Dismount the backside
plate and bottom plate
according to the removal
procedure for the drain
pan.
Dismount the switch box
lid according to the
removal procedure for it.
1. Removal of motor
connectors
1Remove the fan motor
connectors.
2Cut the 3 clamps.
2. Removal of fan housing
FBQ71
Dismount fan housings (1)
and (2) only.
FBQ100 to 140
Fan housings (1), (2), and
(3)
1Press the protruding
part of the fan housing.
2Open the fan housing
downward while
pressing the protruding
part.
3Lift and dismount the
fan housing upward.
Clamp
Clamp
Fan motor
Radiator fins
Backside of EL. compo. box
L1R
A2P
A1P
A3P
Clamp
Inside of EL. compo. box
Fan motor
Fan housing (1)
Fan housing (2)
Fan housing (3)
(except FBQ71)




Si281313E Procedure to Remove Fan Motor
Removal Procedure 7
Step Procedure Points
3. Sliding the coupling Sliding the coupling
Tightening torque of
hexagon socket head
screws at the time of fan
assembly work: 4.5±0.4N·m
Motor mounting bracket
Precautions for fan motor
mounting
• Mount the motor so that the
motor label will be located
next to the fixing screws of
the motor mounting bracket
(see part A).
• Clamp the motor lead wires
securely as they were.
(Make sure that the lead
wires will not come in
contact with any rotating
parts.)
(Make sure that the lead
wires will not come in
contact with any high-
temperature parts.)
• Check that the fan rotor
rotates free of eccentricity.
(FBQ100 to 140 only)
1Loosen the 2 hexagon
socket head screws on
the coupling with a
hexagonal wrench.
2Slide the coupling to the
right-hand side.
4. Removal of motor
1Remove the 2 fixing
screws and dismount
the motor mounting
brackets.
2Dismount the motor
provided with fan rotor
(1).
5. Removal of fan motor
1Loosen the fixing
screws of fan rotor (1)
with a hexagonal
wrench.
2Pull out the fan rotor
and dismount the fan
motor.
Coupling
Fan rotor (1)
Hexagonal wrench
Fan motor
Hexagon socket
head screws
Motor mounting bracket
Screws (Motor label)
Fan rotor (1)
Fan motor
Fan motor
Part A
(Motor label)
Hexagonal
wrench
Coupling
Hexagon socket
head screws
Hexagonal wrench
Hexagon socket
head screws
Motor mounting bracket
Fixing screw

Procedure to Remove Drain Pump and Float Switch Si281313E
8Removal Procedure
6. Procedure to Remove Drain Pump and Float
Switch
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
1. Removal of service lid (1)
assembly
Precautions for the removal
and attachment of the
service lid (1)
<Removal>
• Check that the wires are not
twisted or get tangled.
<Attachment>
1. Attach the lid after checking
that the wires are not twisted
or tangled.
2. Check that the wires are not
caught between the lid (1)
and side plate.
3. Open the inspection port
after attachment work, and
check that the wires are not
in contact with or caught by
the float and that the float
operates normally.
(Otherwise, repeat
inspection steps 1 through
3.)
1Remove the 5 screws
to dismount the service
lid (1) assembly.
2. Removal of drain pump
1Cut the cable tie and
pull out the drain hose.
2Remove the 2 screws
with washers to
dismount the drain
pump.
3. Removal of float switch
1Remove the single
screw and slide the
float switch.
Service lid (1)
Drain hose
Drain pump
Cable tie
Fixing screw
Screw
Float switch