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

Si281317 Procedure to Remove Low Pressure Sensor, Electronic Expansion Valve, and Others
Removal Procedure 9
7. Procedure to Remove Low Pressure Sensor,
Electronic Expansion Valve, and Others
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 parts related
to the outside panel and
the switch box in
accordance with the
Procedure to remove
Outside Panels.
1. Remove the electronic
expansion valve
1Pull out the coil from the
electronic expansion
valve upward.
2Strip off the brazed
sections in 2 places on
the body of the valve
and then remove this
body.
2. Remove the high
pressure switch
1Disconnect the
terminals from the high
pressure switch and
then strip off the brazed
section on the switch.
3. Remove the solenoid
valve
1Unscrew a single screw
from the solenoid valve
coil and then remove
this coil.
2Strip off the brazed
sections in 2 places on
the main unit of the
solenoid valve and then
remove this body.
4. Remove the low pressure
sensor
1Disconnect the
terminals from the low
pressure sensor and
then strip off the brazed
section on the switch.
Low pressure sensor
High
pressure
switch
Electronic
expansion
valve coil
Body of
electronic
expansion
valve
Solenoid
valve coil
Body of
solenoid
valve

Procedure to Remove Thermistor Si281317
10 Removal Procedure
8. 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
Remove the front and top
panels in accordance with
the Procedure to remove
Outside Panel and others
1In order to remove the
discharge pipe
thermistor, pinch the
mounting spring and
pull out this thermistor.
2For the heat exchanger
distributor pipe
thermistor, pull the
clamp frontward and
then remove this
thermistor.
3In order to remove the
outdoor air thermistor,
pull out this thermistor
frontward and then slide
it to the right.
4For the suction pipe
thermistor, pull this
thermistor frontward
and then remove it.
Discharge pipe thermistor Suction pipe thermistor
Heat exchanger distributor pipe
thermistor
Thermistor
Thermistor
Outdoor air thermistor
Thermistor
Thermistor
Clamp
Thermistor
Thermistor

Si281317 Procedure to Remove Four Way Valve
Removal Procedure 11
9. Procedure to Remove Four Way Valve
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 parts related
to the outside panel and
the switch box in
accordance with the
Procedure to remove
Outside Panels.
Check to be sure there are
no more refrigerants left in
the unit before starting this
removal.
In order to prevent a gas
welding flame from having
influence on other pipes,
protect them with a sheet or
iron plate used for welding
operation.
Caution:
While in installation of the
four way valve, in order to
prevent the main unit from
reaching a temperature of
120°C or more, expose the
valve to a flame while
cooling it with a wet rag.
1Unscrew a single screw
that fixes the four way
valve coil and then
remove this coil.
2Strip off the brazed
sections in 4 places on
body of the four way
valve and then remove
this body.
(A)
(B)
(D)
(C)
Four way
valve coil
Screw
Body of four
way valve

Procedure to Remove Compressor Si281317
12 Removal Procedure
10.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
Remove the parts related
to the outside panel and
the switch box in
accordance with the
Removal Procedure for
Outside Panels.
Check to be sure there are
no more refrigerants left in
the unit before starting this
removal.
Color of terminal pins
1 of the 2 nuts that fix the
compressor is located
outside the partition plate.
Caution:
If the brazed sections are
directly stripped off from the
pipes, oil may catch fire.
Be sure to cut the pipes in
advance with a pipe cutter.
1Unscrew the 5 screws
from the stop valve
mounting plate.
2Disconnect the gas
piping and liquid piping.
3Press the protrusion
from both sides to
remove the terminal
cover.
4Remove the lead wires
from the terminal pins.
5Remove the sound
insulation (1), (2), and
vibration-isolating putty.
6Unlock the nuts (∗) that
fix the compressor.
A total of 3 nuts are
provided.
7Strip off the brazed
sections (in 2 places∗).
Before stripping off the
brazed sections, be
sure to cut the suction
and discharge pipes
with a pipe cutter. (See
Caution in the column
of Points.)
8Lift up the compressor
to pull out it.
Cut here
(on suction pipe)
Cut here
(on discharge pipe) W (Black)
(Red) U
V (White)

Revision History
Month / Year Version Revised contents
01/2013 Si281317 First edition

Head Office:
Umeda Center Bldg., 2-4-12, Nakazaki-Nishi,
Kita-ku, Osaka, 530-8323 Japan
Tokyo Office:
JR Shinagawa East Bldg., 2-18-1, Konan,
Minato-ku, Tokyo, 108-0075 Japan
http://www.daikin.com/global_ac/
All rights reserved
c
Warning
zDaikin products are manufactured for export to numerous countries throughout the world. Prior to
purchase, please confirm with your local authorised importer, distributor and/or retailer whether this
product conforms to the applicable standards, and is suitable for use, in the region where the product
will be used. This statement does not purport to exclude, restrict or modify the application of any local
legislation.
zAsk a qualified installer or contractor to install this product. Do not try to install the product yourself.
Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion.
zUse only those parts and accessories supplied or specified by Daikin. Ask a qualified installer or
contractor to install those parts and accessories. Use of unauthorised parts and accessories or
improper installation of parts and accessories can result in water or refrigerant leakage, electrical
shock, fire or explosion.
zRead the User's Manual carefully before using this product. The User's Manual provides important
safety instructions and warnings. Be sure to follow these instructions and warnings.
If you have any enquiries, please contact your local importer, distributor and/or retailer.
Cautions on product corrosion
1. Air conditioners should not be installed in areas where corrosive gases, such as acid gas or alkaline gas, are produced.
2. If the outdoor unit is to be installed close to the sea shore, direct exposure to the sea breeze should be avoided. If you need to install
the outdoor unit close to the sea shore, contact your local distributor.
Dealer
z
Specifications, designs and other content appearing in this brochure are current as of January 2013 but subject to change without notice.
Si281317
01/2013 AK