Panasonic WH-SDC12K6E5 User manual

Operating Instructions
Air-to-Water Heatpump
ENGLISH
Before operating the system, please read these
operating instructions thoroughly and keep them
for future reference.
WEB-ACXF55-36191-EN
Model No.
Indoor Unit Outdoor Unit
WH-SDC0309K3E5
WH-SDC0309K6E5
WH-UDZ03KE5
WH-UDZ05KE5
WH-UDZ07KE5
WH-UDZ09KE5
WH-SDC12K6E5 WH-UDZ12KE5
WH-SDC09K3E8
WH-SDC09K9E8
WH-SDC12K9E8
WH-SDC16K9E8
WH-UDZ09KE8
WH-UDZ09KE8
WH-UDZ12KE8
WH-UDZ16KE8
WH-SXC09K3E5
WH-SXC09K6E5
WH-SXC12K6E5
WH-UXZ09KE5
WH-UXZ09KE5
WH-UXZ12KE5
WH-SXC09K3E8
WH-SXC09K9E8
WH-SXC12K9E8
WH-UXZ09KE8
WH-UXZ09KE8
WH-UXZ12KE8
WH-SXC16K9E8 WH-UXZ16KE8

2
Table of contents
System overview, Operating conditions ............................3
Safety precautions .......................................................4-16
Remote Controller buttons and display .....................17-18
Initialization .....................................................................19
Quick Menu ....................................................................20
How to use the Quick Menu ......................................21-25
Menus ........................................................................26-47
For user
1 Function setup ...................................................26-27
1.1 Weekly timer
1.2 Holiday timer
1.3 Quiet timer
1.4 Quiet priority
1.5 Room heater
1.6 Tank heater
1.7 Sterilization
2 System check .........................................................28
2.1 Energy monitor
2.2 System information
2.3 Error history
2.4 Compressor
2.5 Heater
3 Personal setup ...................................................29-30
3.1 Remote control No.
3.2 Touch sound
3.3 LCD contrast
3.4 Backlight
3.5 Backlight intensity
3.6 Clock format
3.7 Date & Time
3.8 Language
3.9 Unlock password
4 Service contact .......................................................30
4.1 Contact 1 / Contact 2
For installer
5 Installer setup > System setup ..........................31-41
5.1 Optional PCB connectivity
5.2 Zone & Sensor
5.3 Heater capacity
5.4 Anti freezing
5.5 DHW capacity
5.6 Buffer tank connection
5.7 Base pan heater
5.8 Alternative outdoor sensor
5.9 Bivalent connection
5.10 External SW
5.11 Solar connection
5.12 External error signal
5.13 Demand control
5.14 SG ready
5.15 External compressor SW
5.16 Circulation liquid
5.17 Heat-Cool SW
5.18 Force heater
5.19 Force defrost
5.20 Defrost signal
5.21 Pump flowrate
5.22 DHW Defrost
5.23 Heating control
5.24 External meter
6 Installer setup > Operation setup ......................42-46
6.1 Heat
6.2 Cool
6.3 Auto
6.4 Tank
7 Installer setup > Service setup ..........................46-47
7.1 Pump maximum speed
7.2 Pump down
7.3 Dry concrete
7.4 Service contact
8 Installer setup > Remote control setup ...................47
Cleaning instructions .................................................48-49
Troubleshooting .........................................................50-51
Information .................................................................52-53
Thank you for purchasing Panasonic product.
Installation Instructions attached.
Serial number and production year please refer to name plate.

Before use, make sure the system has been installed correctly by an
authorised dealer according to the given instructions.
• Panasonic Air-to-Water Heatpump is a split system, consisting of two units: indoor and outdoor units. This system is designed
to operate with Panasonic Water Tank Unit. Unless used together with the Panasonic Water Tank Unit, Panasonic does not
guarantee any normal operation nor the reliability of the system.
• These operating instructions describe how to operate the system using the indoor and outdoor units.
• As for the operation of other products such as water tank, radiator, external thermo controller, and underfloor units, refer to the
operating instructions of each product.
• Some functions described in this manual may not be applicable to your system.
• Consult your nearest authorised dealer for further information.
Operating conditions
HEATING (CIRCUIT) *1, *2 COOLING (CIRCUIT)
Water outlet temperature (°C)
(Min. / Max.) 20 / 55 (Below Ambient -15 °C) *3
20 / 60 (Above Ambient -10 °C) *35 / 20
Outdoor ambient temperature (°C)
(Min. / Max.)
-20 / 35 (WH-UDZ03KE5)
-25 / 35 (WH-UDZ05/07/09/12KE5) / (WH-UDZ09/12/16KE8)
-28 / 35 (WH-UXZ series) 10 / 43
When the outdoor temperature is out of the range in the table, the heating capacity will drop significantly and the outdoor unit may stop
operating for its protection.
The unit will restart automatically after the outdoor temperature returns to the specified range.
*1The system is locked to operate without COOL mode. It can be unlocked only by authorised installers or our authorised service partners.
*2Only displayed when COOL mode is unlocked (This means when COOL mode is available)
*3Between outdoor ambient -10 °C and -15 °C, the water outlet temperature gradually decreases from 60 °C to 55 °C.
Outdoor
Unit
Power Supply
Solar Panel
Radiator
Shower
Fan Coil
Unit
Floor
Heating
Water Tank Unit
Indoor Unit
Remote Controller
The illustrations in this manual are for explanation purposes only and may differ from the actual unit.
They are subject to change without notice for future improvement.
System overview
Note:
Not recommended to open the Front Plate.
(For authorised dealer/specialist use only)
Front Plate
3

4
Safety precautions
To prevent personal injury, injury to others
or property damage, please comply with the
following:
Incorrect operation due to failure to follow
instructions below may cause harm or
damage, the seriousness of which is classified
as below:
WARNING
This sign
warns of
death or
serious
injury.
CAUTION
This sign
warns of
injury or
damage to
property.
The instructions to be followed are classified
by the following symbols:
This symbol denotes an
action that is PROHIBITED.
These symbols denote
actions COMPULSORY.
WARNING
Indoor unit and outdoor unit
This appliance can be used by
children aged from 8 years and above
and persons with reduced physical,
sensory or mental capabilities or
lack of experience and knowledge
if they have been given supervision
or instruction concerning use of
the appliance in a safe way and
understand the hazards involved.
Children shall not play with the
appliance. Cleaning and user
maintenance shall not be made by
children without supervision.
Please consult an authorised dealer
or specialist to clean the internal
parts, repair, install, remove,
disassemble and reinstall the unit.
Improper handling will cause leakage,
electric shock or fire.
Confirm with authorised dealer or
specialist on usage of any specified
refrigerant type. Using refrigerant type
other than the specified may cause
product damage, burst and injury etc.
Do not use means to accelerate
the defrosting process or to clean,
other than those recommended by
manufacturer.
Any unfit method or using
incompatible material may cause
product damage, burst and serious
injury.
Do not install the unit in a potentially
explosive or flammable atmosphere.
Failure to do so could result in fire.

5
Do not insert your fingers or
other objects into the Air to
water indoor or outdoor unit,
rotating parts may cause injury.
Do not touch the outdoor unit during
lightning, it may cause electric shock.
Do not sit or step on the unit,
you may fall down accidentally.
Do not install the indoor unit outdoors.
This is designed for indoor installation
only.
Power supply
Do not use a modified
cord, joint cord,
extension cord or
unspecified cord to
prevent overheating
and fire.
To prevent overheating, fire or electric
shock:
•Do not share the same power outlet
with other equipment.
•Do not operate with wet hands.
•Do not over bend the power supply
cord.
If the supply cord is damaged, it must
be replaced by the manufacturer,
service agent or similarly qualified
persons in order to avoid a hazard.
This unit is equipped with Residual
Current Circuit Breaker/Earth
Leakage Circuit Breaker (RCCB/
ELCB). Ask an authorised dealer
to check RCCB/ELCB operation
regularly, especially after installation,
inspection, and maintenance. RCCB/
ELCB malfunction may result in
electric shock and/or fire.
It is strongly recommended that Install
Residual Current Device (RCD)
on-site to prevent electric shock and/
or fire.
Before obtaining access to
terminals, all supply circuits must be
disconnected.
Stop using the product if any
abnormality/failure occurs and
disconnect the power supply.
(Risk of smoke/fire/electric
shock)
Examples of abnormality/failure
•RCCB/ELCB trips frequently.
•Burning smell is observed.
•Abnormal noise or vibration of the
unit is observed.
•Hot water leaks from the indoor unit.
Contact your local dealer immediately
for maintenance/repair.
Wear gloves during inspection and
maintenance.
This equipment must be earthed to
prevent electrical shock or fire.
Prevent electric shock by switching off
the power supply:
-Before cleaning or servicing,
-When extended non-use.
This appliance is for multiple uses. To
avoid electric shock, burn and/or fatal
injury, make sure to disconnect all
power supplies before accessing any
terminal in the indoor unit.

6
Safety precautions
CAUTION
Indoor unit and outdoor unit
Do not wash the indoor unit with
water, benzine, thinner or scouring
powder to avoid damage or corrosion
at the unit.
Do not install the unit close to
any combustibles or at bathroom.
Otherwise, it may cause electric
shock and/or fire.
Do not touch the sharp
aluminium fin, sharp parts
may cause injury.
Do not use the system during
sterilisation in order to prevent
scalding with hot water, or
overheating of shower.
Do not dismantle the unit for cleaning
purpose to avoid injury.
Do not step onto an unstable bench
when cleaning the unit to avoid injury.
Do not place a vase or water
container on the unit. Water may enter
the unit and degrade the insulation.
This may cause an electric shock.
Prevent water leakage by ensuring
drainage pipe is:
-Connected properly,
-Kept clear of gutters and containers,
or
-Not immersed in water
After a long period of use or use with
any combustible equipment, aerate
the room regularly.
After a long period of use, make
sure the installation rack does not
deteriorate to prevent the unit from
falling down.
Remote Controller
Do not wet the Remote Controller.
Failure to do so may result in electric
shock and/or fire.
Do not press the buttons on the
Remote Controller using hard and
sharp objects. Failure to do so may
cause damage to the unit.
Do not wash the Remote Controller
using water, benzine, thinner or
scouring powder.
Do not inspect or maintain the
Remote Controller by yourself.
Consult an authorised dealer in order
to prevent personal injury caused by
incorrect operation.

7
WARNING
This appliance is filled with R32
(mild flammable refrigerant).
If the refrigerant is leaked and
exposed to an external ignition
source, there is a risk of fire.
Indoor unit and outdoor unit
The appliance shall be installed, and/
or operated in a room with floor area
larger than Amin (m²) and keep away
from ignition sources, such as heat/
sparks/open flame or hazardous
areas such as gas appliances,
gas cooking, reticulated gas
supply systems or electric cooking
appliances, etc. (Refer to Installation
instructions table for Amin (m²))
Be aware that refrigerant may
not contain an odour, highly
recommended to ensure suitable
flammable refrigerant gas detectors
are present, operating and able to
warn of a leak.
Keep any required ventilation
openings clear of obstruction.
Do not pierce or burn as the appliance
is pressurized. Do not expose the
appliance to heat, flame, sparks, or
other sources of ignition. Else it may
explode and cause injury or death.
Precaution for using R32
refrigerant
The basic installation work procedures are
the same as conventional refrigerant (R410A,
R22) models.
Since the working pressure is
higher than that of refrigerant R22
models, some of the piping and
installation and service tools are
special. Especially, when replacing
a refrigerant R22 model with a new
refrigerant R32 model, always replace
the conventional piping and flare nuts
with the R32 and R410A piping and
flare nuts on the outdoor unit side.
For R32 and R410A, the same flare
nut on the outdoor unit side and pipe
can be used.
The mixing of different refrigerants
within a system is prohibited. Models
that use refrigerant R32 and R410A
have a different charging port thread
diameter to prevent erroneous
charging with refrigerant R22 and for
safety.
Therefore, check beforehand.
[The charging port thread diameter for
R32 and R410A is 1/2 inch.]
Must always ensure that foreign
matter (oil, water, etc.) does not
enter the piping. Also, when storing
the piping, securely seal the opening
by pinching, taping, etc. (Handling of
R32 is similar to R410A.)
•Operation, maintenance, repairing
and refrigerant recovery should be
carried out by trained and certified
personnel in the use of flammable
refrigerants and as recommended
by the manufacturer. Any personnel
conducting an operation, servicing
or maintenance on a system or
associated parts of the equipment
should be trained and certified.

8
Safety precautions
•Any part of refrigerating circuit
(evaporators, air coolers, AHU,
condensers or liquid receivers) or
piping should not be located in the
proximity of heat sources, open
flames, operating gas appliance or
an operating electric heater.
•The user/owner or their authorised
representative shall regularly check
the alarms, mechanical ventilation
and detectors, at least once a
year, where as required by national
regulations, to ensure their correct
functioning.
•A logbook shall be maintained. The
results of these checks shall be
recorded in the logbook.
•In case of ventilations in occupied
spaces shall be checked to confirm
no obstruction.
•Before a new refrigerating system
is put into service, the person
responsible for placing the system
in operation should ensure that
trained and certified operating
personnel are instructed on the
basis of the instruction manual
about the construction, supervision,
operation and maintenance of the
refrigerating system, as well as the
safety measures to be observed,
and the properties and handling of
the refrigerant used.
•The general requirement of trained
and certified personnel are indicated
as below:
a) Knowledge of legislation,
regulations and standards
relating to flammable refrigerants;
and,
b) Detailed knowledge of and
skills in handling flammable
refrigerants, personal protective
equipment, refrigerant leakage
prevention, handling of cylinders,
charging, leak detection,
recovery and disposal; and,
c) Able to understand and to apply in
practice the requirements in the
national legislation, regulations
and Standards; and,
d) Continuously undergo regular
and further training to maintain
this expertise.
e) Air-conditioner piping in the
occupied space shall be installed
in such a way to protect against
accidental damage in operation
and service.
f) Precautions shall be taken to
avoid excessive vibration or
pulsation to refrigerating piping.
g) Ensure protection devices,
refrigerating piping and fittings
are well protected against
adverse environmental effects
(such as the danger of water
collecting and freezing in relief
pipes or the accumulation of dirt
and debris).
h) Expansion and contraction of
long runs piping in refrigerating
systems shall be designed and
installed securely (mounted
and guarded) to minimize the
likelihood hydraulic shock
damaging the system.
i) Protect the refrigerating system
from accidental rupture due to
moving furniture or reconstruction
activities.
j) To ensure no leaking, field-made
refrigerant joints indoors shall
be tightness tested. The test
method shall have a sensitivity
of 5 grams per year of refrigerant
or better under a pressure of at
least 0.25 times the maximum
allowable pressure (>1.04 MPa,
max 4.15 MPa). No leak shall be
detected.

9
1. Installation (Space)
•Product with flammable refrigerants,
shall be installed according to the
minimum room area, Amin (m²)
mentioned in Installation Instructions.
•In case of field charge, the effect
on refrigerant charge caused by
the different pipe length has to be
quantified, measured and labelled.
•Must ensure the installation of pipe-
work shall be kept to a minimum.
Avoid use dented pipe and do not
allow acute bending.
•Must ensure that pipe-work shall be
protected from physical damage.
•Must comply with national gas
regulations, state municipal rules
and legislation. Notify relevant
authorities in accordance with all
applicable regulations.
•Must ensure mechanical connections
be accessible for maintenance
purposes.
•In cases that require mechanical
ventilation, ventilation openings shall
be kept clear of obstruction.
•When disposal of the product, do
follow to the precautions in #12 and
comply with national regulations.
Always contact to local municipal
offices for proper handling.
2. Servicing
2-1. Service personnel
•The system is inspected, regularly
supervised and maintained by
a trained and certified service
personnel who is employed by the
person user or party responsible.
•Ensure the actual refrigerant charge
is in accordance with the room
size within which the refrigerant
containing parts are installed.
•Ensure refrigerant charge not to
leak.
•Any qualified person who is involved
with working on or breaking into
a refrigerant circuit should hold
a current valid certificate from an
industry-accredited assessment
authority, which authorizes their
competence to handle refrigerants
safely in accordance with an
industry recognised assessment
specification.
•Servicing shall only be performed
as recommended by the equipment
manufacturer. Maintenance and
repair requiring the assistance of
other skilled personnel shall be
carried out under the supervision of
the person competent in the use of
flammable refrigerants.
•Servicing shall be performed only as
recommended by the manufacturer.

10
Safety precautions
2-2. Work
•Prior to beginning work on systems
containing flammable refrigerants,
safety checks are necessary to
ensure that the risk of ignition
is minimised. For repair to the
refrigerating system, the precautions
in #2-2 to #2-8 must be followed
before conducting work on the
system.
•Work shall be undertaken under
a controlled procedure so as to
minimize the risk of a flammable gas
or vapour being present while the
work is being performed.
•All maintenance staff and others
working in the local area shall be
instructed and supervised on the
nature of work being carried out.
•Avoid working in confined spaces.
Always ensure away from source, at
least 2 meter of safety distance, or
zoning of free space area of at least
2 meter in radius.
•Wear appropriate protective
equipment, including respiratory
protection, as conditions warrant.
•Keep all sources of ignition and hot
metal surfaces away.
2-3. Checking for presence of
refrigerant
•The area shall be checked with an
appropriate refrigerant detector prior
to and during work, to ensure the
technician is aware of potentially
flammable atmospheres.
•Ensure that the leak detection
equipment being used is suitable for
use with flammable refrigerants, i.e.
non sparking, adequately sealed or
intrinsically safe.
•In case of leakage/spillage
happened, immediately ventilate
area and stay upwind and away from
spill/release.
•In case of leakage/spillage
happened, do notify persons down
wind of the leaking/spill, isolate
immediate hazard area and keep
unauthorized personnel out.
2-4. Presence of fire extinguisher
•If any hot work is to be conducted
on the refrigerating equipment or
any associated parts, appropriate
fire extinguishing equipment shall be
available at hand.
•Have a dry powder or CO2fire
extinguisher adjacent to the charging
area.

11
2-5. No ignition sources
•No person carrying out work in
relation to a refrigerating system
which involves exposing any pipe
work that contains or has contained
flammable refrigerant shall use
any sources of ignition in such a
manner that it may lead to the risk
of fire or explosion. They must not
be smoking when carrying out such
work.
•All possible ignition sources,
including cigarette smoking, should
be kept sufficiently far away from
the site of installation, repairing,
removing and disposal, during which
flammable refrigerant can possibly
be released to the surrounding
space.
•Prior to work taking place, the area
around the equipment is to be
surveyed to make sure that there
are no flammable hazards or ignition
risks.
•“No Smoking” signs shall be
displayed.
2-6. Ventilated area
•Ensure that the area is in the open
or that it is adequately ventilated
before breaking into the system or
conducting any hot work.
•A degree of ventilation shall continue
during the period that the work is
carried out.
•The ventilation should safely
disperse any released refrigerant
and preferably expel it externally into
the atmosphere.
2-7. Checks to the refrigerating
equipment
•Where electrical components are
being changed, they shall be fit
for the purpose and to the correct
specification.
•At all times the manufacturer’s
maintenance and service guidelines
shall be followed.
•If in doubt consult the manufacturer’s
technical department for assistance.
•The following checks shall be
applied to installations using
flammable refrigerants.
-The actual refrigerant charge
is in accordance with the room
size within which the refrigerant
containing parts are installed.
-The ventilation machinery and
outlets are operating adequately
and are not obstructed.
-If an indirect refrigerating circuit is
being used, the secondary circuit
shall be checked for the presence
of refrigerant.
-Marking to the equipment
continues to be visible and legible.
Markings and signs that are
illegible shall be corrected.
-Refrigerating pipe or components
are installed in a position where
they are unlikely to be exposed to
any substance which may corrode
refrigerant containing components,
unless the components are
constructed of materials which
are inherently resistant to being
corroded or are properly protected
against being so corroded.

12
Safety precautions
2-8. Checks to electrical devices
•Repair and maintenance to electrical
components shall include initial
safety checks and component
inspection procedures.
•Initial safety checks shall include but
not limit to:-
-That capacitors are discharged:
this shall be done in a safe manner
to avoid possibility of sparking.
-That there no live electrical
components and wiring are
exposed while charging,
recovering or purging the system.
-That there is continuity of earth
bonding.
•At all times the manufacturer’s
maintenance and service guidelines
shall be followed.
•If in doubt consult the manufacturer’s
technical department for assistance.
•If a fault exists that could
compromise safety, then no electrical
supply shall be connected to the
circuit until it is satisfactorily dealt
with.
•If the fault cannot be corrected
immediately but it is necessary to
continue operation, an adequate
temporary solution shall be used.
•The owner of the equipment must be
informed or reported so all parties
are advised thereinafter.
3. Repairs to sealed components
•During repairs to sealed
components, all electrical supplies
shall be disconnected from the
equipment being worked upon prior
to any removal of sealed covers, etc.
•If it is absolutely necessary to have
an electrical supply to equipment
during servicing, then a permanently
operating form of leak detection shall
be located at the most critical point
to warn of a potentially hazardous
situation.
•Particular attention shall be paid
to the following to ensure that by
working on electrical components,
the casing is not altered in such a
way that the level of protection is
affected. This shall include damage
to cables, excessive number of
connections, terminals not made
to original specification, damage to
seals, incorrect fitting of glands, etc.
•Ensure that apparatus is mounted
securely.
•Ensure that seals or sealing
materials have not degraded such
that they no longer serve the
purpose of preventing the ingress of
flammable atmospheres.
•Replacement parts shall be in
accordance with the manufacturer’s
specifications.
NOTE: The use of silicon sealant may
inhibit the effectiveness of some types
of leak detection equipment.
Intrinsically safe components do not
have to be isolated prior to working
on them.

13
4. Repair to intrinsically safe
components
•Do not apply any permanent
inductive or capacitance loads to
the circuit without ensuring that
this will not exceed the permissible
voltage and current permitted for the
equipment in use.
•Intrinsically safe components are
the only types that can be worked
on while live in the presence of a
flammable atmosphere.
•The test apparatus shall be at the
correct rating.
•Replace components only with
parts specified by the manufacturer.
Unspecified parts by manufacturer
may result ignition of refrigerant in
the atmosphere from a leak.
5. Cabling
•Check that cabling will not be
subject to wear, corrosion, excessive
pressure, vibration, sharp edges or
any other adverse environmental
effects.
•The check shall also take into
account the effects of aging or
continual vibration from sources
such as compressors or fans.
6. Detection of flammable
refrigerants
•Under no circumstances shall
potential sources of ignition be used
in the searching or detection of
refrigerant leaks.
•A halide torch (or any other detector
using a naked flame) shall not be
used.
7. The following leak detection
methods are deemed acceptable
for all refrigerant systems
•No leaks shall be detected using
detection equipment with sensitivity
to detect leakage of 5g/year of
refrigerant or better under a pressure
of at least 0.25 times the maximum
allowable pressure (>1.04 MPa, max
4.15 MPa), for example, a universal
sniffer.
•Electronic leak detectors may
be used to detect flammable
refrigerants, but the sensitivity may
not be adequate, or may need re-
calibration.
(Detection equipment shall be
calibrated in a refrigerant-free area.)
•Ensure that the detector is not a
potential source of ignition and is
suitable for the refrigerant used.
•Leak detection equipment shall be
set at a percentage of the LFL of the
refrigerant and shall be calibrated
to the refrigerant employed and the
appropriate percentage of gas (25 %
maximum) is confirmed.
•Leak detection fluids are also
suitable for use with most
refrigerants, for example, bubble
method and fluorescent method
agents. The use of detergents
containing chlorine shall be avoided
as the chlorine may react with the
refrigerant and corrode the copper
pipe-work.
•If a leak is suspected, all naked
flames shall be removed/
extinguished.
•If a leakage of refrigerant is found
which requires brazing, all of the
refrigerant shall be recovered from
the system, or isolated (by means
of shut off valves) in a part of the
system remote from the leak. The
precautions in #8 must be followed
to remove the refrigerant.

14
Safety precautions
8. Removal and evacuation
•When breaking into the refrigerant
circuit to make repairs – or for
any other purpose – conventional
procedures shall be used. However,
it is important that best practice
is followed since flammability is
a consideration. The following
procedure shall be adhered to:
remove refrigerant -> purge the
circuit with inert gas -> evacuate ->
purge with inert gas -> open the
circuit by cutting or brazing.
•The refrigerant charge shall be
recovered into the correct recovery
cylinders.
•The system shall be purged with
OFN to render the appliance safe.
•This process may need to be
repeated several times.
•Compressed air or oxygen shall not
be used for this task.
•Purging shall be achieved by
breaking the vacuum in the system
with OFN and continuing to fill until
the working pressure is achieved,
then venting to atmosphere, and
finally pulling down to a vacuum.
•This process shall be repeated until
no refrigerant is within the system.
•When the final OFN charge is used,
the system shall be vented down to
atmospheric pressure to enable work
to take place.
•This operation is absolutely vital if
brazing operations on the pipe work
are to take place.
•Ensure that the outlet for the vacuum
pump is not close to any potential
ignition sources and there is
ventilation available.
OFN = oxygen free nitrogen, type of
inert gas.
9. Charging procedures
•In addition to conventional
charging procedures, the following
requirements shall be followed.
-Ensure that contamination of
different refrigerants does not
occur when using charging
equipment.
-Hoses or lines shall be as short as
possible to minimize the amount of
refrigerant contained in them.
-Cylinders shall be kept in an
appropriate position according to
the instructions.
-Ensure that the refrigerating
system is earthed prior to charging
the system with refrigerant.
-Label the system when charging is
complete (if not already).
-Extreme care shall be taken not to
over fill the refrigerating system.
•Prior to recharging the system it
shall be pressure tested with OFN
(refer to #7).
•The system shall be leak tested on
completion of charging but prior to
commissioning.
•A follow up leak test shall be carried
out prior to leaving the site.
•Electrostatic charge may accumulate
and create a hazardous condition
when charging and discharging the
refrigerant. To avoid fire or explosion,
dissipate static electricity during
transfer by grounding and bonding
containers and equipment before
charging/discharging.

15
10. Decommissioning
•Before carrying out this procedure,
it is essential that the technician
is completely familiar with the
equipment and all its details.
•It is recommended good practice
that all refrigerants are recovered
safely.
•Prior to the task being carried
out, an oil and refrigerant sample
shall be taken in case analysis is
required prior to re-use of recovered
refrigerant.
•It is essential that electrical power
is available before the task is
commenced.
a) Become familiar with the
equipment and its operation.
b) Isolate system electrically.
c) Before attempting the procedure
ensure that:
• mechanical handling equipment is
available, if required, for handling
refrigerant cylinders;
• all personal protective equipment
is available and being used
correctly;
• the recovery process is
supervised at all times by a
competent person;
• recovery equipment and cylinders
conform to the appropriate
standards.
d) Pump down refrigerant system, if
possible.
e) If a vacuum is not possible, make
a manifold so that refrigerant can
be removed from various parts of
the system.
f) Make sure that cylinder is situated
on the scales before recovery
takes place.
g) Start the recovery machine and
operate in accordance with
instructions.
h) Do not over fill cylinders. (No
more than 80 % volume liquid
charge).
i) Do not exceed the maximum
working pressure of the cylinder,
even temporarily.
j) When the cylinders have been
filled correctly and the process
completed, make sure that the
cylinders and the equipment
are removed from site promptly
and all isolation valves on the
equipment are closed off.
k) Recovered refrigerant shall not be
charged into another refrigerating
system unless it has been
cleaned and checked.
•Electrostatic charge may accumulate
and create a hazardous condition
when charging or discharging the
refrigerant. To avoid fire or explosion,
dissipate static electricity during
transfer by grounding and bonding
containers and equipment before
charging/discharging.
11. Labelling
•Equipment shall be labelled stating
that it has been de-commissioned
and emptied of refrigerant.
•The label shall be dated and signed.
•Ensure that there are labels on the
equipment stating the equipment
contains flammable refrigerant.

16
Safety precautions
12. Recovery
•When removing refrigerant from
a system, either for servicing or
decommissioning, it is recommended
good practice that all refrigerants are
removed safely.
•When transferring refrigerant
into cylinders, ensure that only
appropriate refrigerant recovery
cylinders are employed.
•Ensure that the correct number of
cylinders for holding the total system
charge are available.
•All cylinders to be used are
designated for the recovered
refrigerant and labelled for that
refrigerant (i.e. special cylinders for
the recovery of refrigerant).
•Cylinders shall be complete with
pressure relief valve and associated
shut-off valves in good working
order.
•Recovery cylinders are evacuated
and, if possible, cooled before
recovery occurs.
•The recovery equipment shall
be in good working order with a
set of instructions concerning the
equipment that is at hand and
shall be suitable for the recovery of
flammable refrigerants.
•In addition, a set of calibrated
weighing scales shall be available
and in good working order.
•Hoses shall be complete with leak-
free disconnect couplings and in
good condition.
•Before using the recovery machine,
check that it is in satisfactory working
order, has been properly maintained
and that any associated electrical
components are sealed to prevent
ignition in the event of a refrigerant
release. Consult manufacturer if in
doubt.
•The recovered refrigerant shall be
returned to the refrigerant supplier
in the correct recovery cylinder, and
the relevant Waste Transfer Note
arranged.
•Do not mix refrigerants in recovery
units and especially not in cylinders.
•If compressors or compressor oils
are to be removed, ensure that
they have been evacuated to an
acceptable level to make certain
that flammable refrigerant does not
remain within the lubricant.
•The evacuation process shall be
carried out prior to returning the
compressor to the suppliers.
•Only electric heating to the
compressor body shall be employed
to accelerate this process.
•When oil is drained from a system, it
shall be carried out safely.

17
Remote Controller buttons and display
The LCD display as shown in this manual are for
instructional purpose only, and may differ from the
actual unit.
Buttons / Indicator
1Quick Menu button
2Back button
Returns to the previous screen
3LCD Display
(Actual - Dark background with white icons)
4Main Menu button
For function setup
5ON/OFF button
Starts/Stops operation
6
Operation indicator
Illuminates during operation, blinks during
alarm.
Press centre
No glove
No pen
2
A
1
4
E
F
5
6
B C D
3
G
Cross key buttons
Selects an item.
Enter button
Fixes the selected content.
Up
Down
Left Right

18
Remote Controller buttons and display
Display
AMode selection
*1, *2 AUTO • Depending on the preset outdoor
temperature, the system selects
HEAT or *1, *2COOL operation
mode.
Auto Heat Auto Cool
*1, *2 COOL • COOL operation is either turned
ON or OFF.
• The outdoor unit provides cooling
to the system.
*1, *2 AUTO
+ TANK
• Depending on the preset outdoor
temperature, the system selects
HEAT + TANK or *1, *2COOL +
TANK operation mode.
Auto Heat Auto Cool
*1, *2 COOL
+ TANK
• The outdoor unit provides cooling
to the system.
• The outdoor unit provides heating
when boiling tank.
HEAT • HEAT operation is either turned
ON or OFF.
• The outdoor unit provides heat to
the system.
TANK • TANK operation is either turned
ON or OFF.
• The outdoor unit provides heat to
the water tank.
HEAT
+ TANK
• The outdoor unit provides heat to
the water tank and the system.
• This mode can be selected only
when the water tank is installed.
* The direction icons point to the currently
active mode.
• Room operation / Tank operation.
• Deice operation.
BOperation icons
The status of operation is displayed.
Icon will not display (under operation OFF screen) whenever operation is OFF except weekly timer.
Holiday operation status Weekly Timer operation status Quiet operation status
Zone:Room Thermostat
→Internal sensor status Powerful operation status Demand Control or SG ready or SHP status
Room Heater status Tank Heater status Solar status
Bivalent status
(Boiler)
CTemperature of each zone
DTime and day
EWater Tank temperature
FOutdoor temperature
GSensor type/Set temperature type icons
Water Temperature
→Compensation curve
Water Temperature
→Direct Pool only
Room Thermostat
→External
Room Thermostat
→Internal Room Thermistor
*1The system is locked to operate without COOL mode. It can be unlocked only by authorised installers or our authorised service partners.
*2Only displayed when COOL mode is unlocked (This means when COOL mode is available).

19
Initialization
Before starting to install the various menu settings, please initiate the Remote Controller by selecting the language of
operation and installing the date and time correctly.
When power is turned on for the first time, it becomes the setting screen automatically. It can also be set from personal
setting of the menu.
Selecting the language LCD blinking
Wait while the display is initializing.
When initializing screen ends, it turns to
normal screen.
When any button is pressed, language
setting screen appears.
1Scroll with and to select the language.
2Press to confirm the selection.
Setting the clock
Clock format
Select Confirm
12:00am,Sat
24h
am/pm
Select Confirm
12:00am,Sat Date & Time
/ 01 / 01
Year/Month/Day
Hour : Min
12 : 00 am2022
1Select with or how to display the time,
either 24h or am/pm format (for example, 15:00
or 3:00 pm).
2Press to confirm the selection.
3Use and to select year, month, day,
hour and minutes. (Select and move with
and press to confirm.)
4Once the time is set, time and day will appear
on the display even if the Remote Controller is
turned OFF.
5Final precaution step to check and confirm
whether outdoor front grille is fixed before
operating the unit for safety purpose.
Select Yes if outdoor front grille is already
fixed. Then it will proceed to main screen.
Select No if outdoor front grille is not yet fixed.
A caution message will pop up to remind on the
installation.
*NOTE : Only applicable for indoor SDC models.
Is O/D front grille fixed?
Select Confirm
12:00am,Sat
Yes
Front grille
No
Is O/D front grille fixed?
Select Confirm
12:00am,Sat
Yes
Front grille
No
To prevent injury, fix
front grille before ope.
Close
Caution
12:00am,Sat
Start

20
After the initial settings have been completed, you can select a quick menu from the following options and edit
the setting.
Select each setting and confirm the setting according to
the instructions displayed at the bottom of the screen.
(The icons refer to each selection key.)
Quick Menu
Force DHW Powerful Quiet Force Heater
Weekly Timer Force Defrost Error Reset R/C Lock
1Press to display the quick menu. 2Use to select menu.
3Press to turn on/off the select menu.
To return to the Main Screen,
Press or .
Quick Menu