Daikin RZQ100HY4A User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Outdoor Unit
Inverter
Pair Type
4/5/6 HP Class
Si281317

Service Manual
Removal Procedure
Outdoor Unit
Applicable Models
zHeat Pump
RZQ100HY4A
RZQ125HY4A
RZQ160HY4A

Si281317
Removal Procedure 1
Table of Contents
1. Procedure to Remove Outside Panels....................................................2
2. Procedure to Remove Propeller Fan and Fan Motor ..............................3
3. Procedure to Remove Switch Box ..........................................................4
4. Procedure to Remove PCB Assy (1).......................................................6
5. Procedure to Remove PCB Assy (2).......................................................7
6. Procedure to Remove PCB Assy (3).......................................................8
7. Procedure to Remove Low Pressure Sensor,
Electronic Expansion Valve, and Others.................................................9
8. Procedure to Remove Thermistor .........................................................10
9. Procedure to Remove Four Way Valve.................................................11
10.Procedure to Remove Compressor.......................................................12

Procedure to Remove Outside Panels Si281317
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
1For the suction grille,
pull the lower parts (in 7
places) frontward,
disengage the hooks at
the top of the grille with
a slotted screwdriver,
and then press the
overall grille downward
to disassemble it.
2For the front panel (side
front panel), unscrew a
single mounting screw
and then press this
panel downward to
remove it.
3For the top panel,
unscrew the 8 mounting
screws and then
remove this panel.
4For the front panel of
the piping cover,
unscrew a single
mounting screw and
then remove this panel.
5For the side panel of
the piping cover,
unscrew the 4 mounting
screws and then
remove this panel.
6For the side rear panel,
unscrew the 6 mounting
screws and then
remove this panel.
Hooks Suction grille
Top panel
Front panel of
piping cover
Front
panel Side panel of piping
cover
Side
rear
panel

Si281317 Procedure to Remove Propeller Fan and Fan Motor
Removal Procedure 3
2. 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
Remove the front and top
panels in accordance with
the Procedure to remove
Outside Panels.
1. Remove the propeller fan
1Unscrew the 4 screws
that fix the air discharge
grille and disengage the
4 hooks at the top and
bottom of the grille, and
then remove this air
discharge grille.
2Unfasten the fan lock
nut that fixes the
propeller fan.
2. Remove the fan motor In order to disconnect the
connector, do not pull the
lead wire. Hold the
connector part and then
press the hooks.
Cautions in mounting the
motor
Be sure to fix the motor lead
wire with a clamp. Not
heeding this caution will
cause the entanglement of
the lead wire around the fan,
which will result in damage
to the fan.
1Remove the connector
for the fan motor from
the PCB.
(X206A, X207A)
2The lead wire is
clamped in 3 places.
(Click on partition
plate×3 places)
3Unscrew the 3 screws
that fix the front panel
and then pull up the
lead wire.
4Unfastening the 4 lock
bolts from the fan motor
enables the removal of
this fan motor.
Air discharge grille
Fan lock nut
Propeller fan
Hooks
Hooks
Hooks
Connector for fan motor
Screws
(3 numbers)
Clamp
Bolts (4 numbers)
Lead wire Propeller fan

Procedure to Remove Switch Box Si281317
4Removal Procedure
3. 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
Remove the front and top
panels in accordance with
the Procedure to remove
Outside Panels.
If the top panel cannot be
removed, this switch box will
be able to be dismounted
without removing the top
panel.
1Remove all connectors
and Fasten terminals,
which have a
connection to the switch
box.
Remove the lead
wire from the
terminal of the high
pressure switch.
Remove the lead
wire of the
compressor from
the terminal cover of
this compressor.
Disconnect the relay
connector from the
lead wire of the
reactor.
Disconnect the relay
connector(s) from
the lead wire of the
fan motor(s).
Remove the lead
wire from the
terminal of the high
pressure switch and
low pressure
sensor.
Disconnect the
respective
connectors from the
following parts on
the PCB.
• Each thermistor
• Coil of four way
valve
• Coil of solenoid
valve
Fixing screw of
switch box

Si281317 Procedure to Remove Switch Box
Removal Procedure 5
2Unscrew the 2 screws
that fix the switch box.
3In order to remove the
switch box, disengage
the 3 hooks (1 on the
right and 2 on the left),
and then pull out this
switch box frontward or
upward.
Step Procedure Points
Hook
Hook
Hook

Procedure to Remove PCB Assy (1) Si281317
6Removal Procedure
4. Procedure to Remove PCB Assy (1)
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
Remove the front, top and
side panels in accordance
with the Procedure to
remove Outside Panels.
1. Remove the PCB (for
control)
1Disconnect all
connectors.
Remove the lead
wire from the
terminal cover of the
compressor.

Remove the lead
wire from the
terminal of the high
pressure switch and
low pressure sensor.
Disconnect the
respective
connectors from the
following parts on
the PCB.
• Each thermistor
• Four way valve
coil
• Solenoid valve
coil
2Unscrew a single
screw from the PCB
assy (for control
use).
Note:
The plastic casing and the PCB
are boned to each other.
Therefore, for the replacement
of these parts, replace by a set
of the PCB assy.
3In order to remove
the PCB (for control
use) from a fixing
plate, disengage the
3 hooks.
Fixing screw of PCB assy
(for control use)
Hooks
Plastic casing
PCB

Si281317 Procedure to Remove PCB Assy (2)
Removal Procedure 7
5. Procedure to Remove PCB Assy (2)
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
2. Remove the PCB (for
inverter)
1Disconnect all
connectors.
Unscrew the 3 screws
that fix the mounting
plate of electrical
components (for
control).
2Disengage the hooks in
2 places to remove the
mounting plate of
electrical components
(for control).
3In order to remove the
PCB assy (for inverter),
unscrew a single screw.
Note:
The plastic casing and the PCB are bonded to each
other. Therefore, for the replacement of these parts,
replace by a set of the PCB assy.
Hooks
Plastic casing
PCB
Fixing screw

Procedure to Remove PCB Assy (3) Si281317
8Removal Procedure
6. Procedure to Remove PCB Assy (3)
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
3. Remove the PCB unit (for
inverter).
1Unscrew the 4 screws
that fix the PCB and the
radiation fin.
2Disengage the 2 hooks,
and then while peeling
off silicon, remove the
PCB (for inverter).
3Disengage the 4
mounting screws to
remove the radiation
fin.
PCB mounting plate
Radiation fin