Hokkaido V-Design Series User manual

R32
Refrigerant
Air Conditioners
Heat Pump “Wall” Type DC Inverter Models
1 Phase, 220-240V, 50Hz Power Supply
V-Design Series:
HKEU (262, 352) ZAL-B
HCNI (262, 352) ZA
Service Manual [
Release 1.0 ]
(optional)

V-Design Series: “Wall” Type R32 AC: Table of Contents
Table of Contents
Table of Contents
SAFETY PRECAUTIONS .................................................................................................................................... I
1. SPECIFICATIONS ...................................................................................................................................... [1]-1
1.1 PRODUCT OVERVIEW........................................................................................................................ [1]-1
1.2 TECHNICAL DATA TABLES .............................................................................................................. [1]-2
1.3 PIPE LENGTH AND DROP HEIGHT.................................................................................................. [1]-3
1.4 ELECTRICAL WIRING DIAGRAMS ................................................................................................... [1]-4
2. PRODUCT FEATURES ............................................................................................................................ [2]-1
2.1 DISPLAY FUNCTION ......................................................................................................................... [2]-1
2.2 SAFETY FEATURES..........................................................................................................................[2]-2
2.3 BASIC FUNCTIONS...........................................................................................................................[2]-3
2.4 OPTIONAL FUNCTIONS...................................................................................................................[2]-7
3. MAINTENANCE ....................................................................................................................................... [3]-1
3.1 FIRST TIME INSTALLATION CHECK ................................................................................................ [3]-1
3.2 REFRIGERANT RECHARGE..............................................................................................................[3]-3
3.3 RE-INSTALLATION........................................................................................................................... [3]-4
4. INDOOR UNITS DISASSEMBLY............................................................................................................. [4]-1
4.1 INDOOR UNITS DIMENSIONS.......................................................................................................... [4]-1
4.2 DISASSEMBLING THE INDOOR UNIT............................................................................................ [4]-2
5. OUTDOOR UNITS DISASSEMBLY......................................................................................................... [5]-1
5.1 OUTDOOR UNITS DIMENSIONS...................................................................................................... [5]-1
5.2 DISASSEMBLING THE OUTDOOR UNIT.........................................................................................[5]-2
6. TROUBLESHOOTING ............................................................................................................................. [6]-1
6.1 SAFETY CAUTION............................................................................................................................. [6]-1
6.2 GENERAL TROUBLESHOOTING .................................................................................................... [6]-2
6.3 COMPLAIN RECORD FORM............................................................................................................ [6]-3
6.4 INFORMATION INQUIRY................................................................................................................. [6]-5
6.5 ERROR DIAGNOSIS AND TROUBLESHOOTING WITHOUT ERROR CODE............................... [6]-8
6.6 QUICK MAINTENANCE BY ERROR CODE ...................................................................................[6]-14
6.7 TROUBLESHOOTING BY ERROR CODE ...................................................................................... [6]-15
6.8 CHECK PROCEDURES................................................................................................................... [6]-33
7. APPENDIX................................................................................................................................................ [7]-1
7.1 TEMPERATURE SENSOR RESISTANCE VALUE TABLES ............................................................... [7]-1
7.2 PRESSURE ON SERVICE PORT (R32 REFRIGERANT)...................................................................[7]-3

V-Design Series “Wall” Type R32 AC: Safety Precautions
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SAFETY PRECAUTIONS
CAUTION
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WARNING
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CAUTION
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WARNING
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CAUTION
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WARNING
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1. Precautions
To prevent personal injury, or property or unit damage, adhere
to all precautionary measures and instructions outlined in this
Manual. Before servicing a unit, refer to this Service Manual
and its relevant sections.
Failure to adhere to all precautionary measures listed in this
section may result in personal injury, damage to the unit or to
property, or in extreme cases, death.
1.1 In case of Accidents or Emergency
WARNING: indicates a potentially hazardous situation
which if not avoided could result in serious personal
injury, or death.
CAUTION: indicates a potentially hazardous situation
which if not avoided could result in minor or moderate
personal injury, or unit damage.
If a gas leak is suspected, immediately turn off the gas
appliance and ventilate the area before turning the
unit on.
If strange sounds or smoke is detected coming from
the unit, turn the breaker off and disconnect the power
supply cable.
If the unit comes into contact with liquid, contact an
authorized Service Center.
If liquid from the batteries makes contact with skin or
clothing, immediately rinse or wash the area well with
clean water.
Do not insert hands or other objects into the air inlet or
outlet while the unit is plugged in.
Do not operate the unit with wet hands.
Do not use a remote controller that has previously
been exposed to battery damage or battery leakage.
Clean and ventilate the unit at regular intervals when
operating it near a stove or near similar devices.
Do not use the unit during severe weather conditions.
If possible, disconnect he product from the power
supply source before such occurrences.
1.2 Pre-Installation and Installation
Use this unit only on a dedicated circuit.
Damage to the installation area could cause the unit to
fall, potentially resulting in personal injury, property
damage, or product failure.
Only qualified personnel should disassemble, install,
remove, or repair the unit.
Only a qualified electrician should perform electrical
work. For more information, contact your dealer, re-
seller, or an authorized Service Center.
1.3 Operation and Maintenance
While unpacking, be careful of sharp edges around
the unit as well as the edges of the fins on the conden-
ser and evaporator.
Do not use defective or under-rated circuit breakers.
Ensure the unit is properly grounded and that a de-
dicated circuit and breaker are installed.
Do not modify or extend the power cable. Ensure the
power cable is secure and not damaged during opera-
tion.
Do not unplug the power supply plug during opera-
tion.
Do not store or use flammable materials near the unit.
Do not open the inlet grill of the unit during operation.
Do not touch the electrostatic filter if the unit is equip-
ped with one.
Do not block the inlet or outlet of air flow to the unit.
Do not use harsh detergents, solvents, or similar
items to clean the unit. Use a soft cloth for cleaning.
Do not touch the metal parts of the unit when remo-
ving the air filter as they are very sharp.
Do not step on or place anything on the unit or outdo-
or units.
Do not drink water drained from the unit.
Avoid direct skin contact with water drained from the
unit.
Use a firm stool or step ladder according to manufac-
turer procedures when cleaning or maintaining the
unit.
Do not install or operate the unit for an extended
period of time in areas with high humidity or in an
environment directly exposing it to sea wind or salt
spray.
Do not install the unit on a defective or damaged
installation stand, or in an unsecure location.
Ensure the unit is installed at a level position.
Do not install the unit where noise or air discharge
created by the outdoor unit will negatively impact the
environment or nearby residences.
Do not expose skin directly to the air discharged by
the unit for prolonged periods of time.
Ensure the unit operates in areas without splashes of
water or other liquids.
Ensure the drain hose is installed correctly to ensure
proper water drainage.
When lifting or transporting the unit, it is recommen-
ded that two or more people are used for this task.
When the unit is not to be used for an extended time,
disconnect the power supply or turn off the circuit
breaker.

V-Design Series “Wall” Type R32 AC: Safety Precautions
II
2. Information about servicing (for flammable refrigerants)
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2.1 Checks to the area
Prior to beginning work on systems containing flam-
mable refrigerants, safety checks are necessary to
ensure that the risk of ignition is minimized.
For repairs to the refrigerating system, the following
precautions shall be complied with prior to conducting
work on the system.
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2.2 Work procedure
Work shall be undertaken under a controlled procedure
so as to minimise the risk of a flammable gas or vapour
being present while the work is being performed.
2.3 Work area
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All maintenance staff and others working in the local
area shall be instructed on the nature of work being
carried out.
Work in confined spaces shall be avoided.
The area around the work space shall be sectioned off.
Ensure that the conditions within the area have been
made safe by control of flammable material.
2.4 Checking for presence of refrigerant
The area shall be checked with an appropriate refrige-
rant detector prior to and during work, to ensure the
technician is aware of potentially flammable atmosphe-
res.
Ensure that the leak detection equipment being used is
suitable for use with flammable refrigerants, i.e. no
sparking, adequately sealed or intrinsically safe.
2.5 Presence of fire extinguisher
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If any hot work is to be conducted on the refrigeration
equipment or any associated parts, appropriate fire ex-
tinguishing equipment shall be available to hand.
Have a dry powder or CO2 fire extinguisher adjacent to
the charging area.
2.6 No ignition sources
No person carrying out work in relation to a refrigeration
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.
All possible ignition sources, including cigarette smok-
ing, 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 equip-
ment is to be surveyed to make sure that there are no
flammable hazards or ignition risks.
NO SMOKING signs shall be displayed.
2.7 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.
2.8 Checks to the refrigeration equipment
Where electrical components are being changed,
they
shall be fit for the purpose and to the correct
spe-
cification.
At all times the manufacturer’s maintenance and service
guidelines shall be followed.
If in doubt consult the manufacturer’s technical depart-
ment for assistance.
The following checks shall be applied to
installations
using flammable refrigerants:
The charge size 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.
Refrigeration 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 suitably protected against being
so
corroded.
2.9 Checks to electrical devices
Repair and maintenance to electrical components
shall
include initial safety checks and component
inspection
procedures.
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. This shall be reported to
the
owner of the equipment so all parties are advised.
Initial safety checks shall include:
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.

V-Design Series “Wall” Type R32 AC: Safety Precautions
III
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2.10 Repairs to sealed components
During repairs to sealed components, all electrical sup-
plies 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 ope-
rating 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 ca-
bles, 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 degra-
ded 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 effective-
ness of some types of leak detection equipment.
Intrinsically safe components do not have to be isolated
prior to working on them.
2.11 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. Other parts may result in the ignition of
refrigerant in the atmosphere from a leak.
2.12 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.
2.13 Detection of flammable refrigerants
Under no circumstances shall potential sources of igni-
tion be used in the searching for or detection of refrige-
rant leaks.
A halide torch (or any other detector using a naked fla-
me) shall not be used.
2.14 Leak detection methods
The following leak detection methods are deemed
ac-
ceptable for systems containing flammable refrigerants.
Electronic leak detectors shall be used to detect flam-
mable refrigerants, but the sensitivity may not be ade-
quate, or may need re-calibration. (Detection equip-
ment shall be calibrated in a refrigerant-free area.)
Ensure that the detector itself 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 percenta-
ge of gas (25 % maximum) is confirmed.
Leak detection fluids are suitable for use with most
refrigerants but the use of detergents containing chlori-
ne 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 remo-
ved or 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.
Oxygen free nitrogen (OFN) shall then be
purged
through the system both before and during the
braz-
ing process.
2.15 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 again 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 flushed with OFN to render the
unit
safe. This process may need to be repeated several
ti-
mes. Compressed air or oxygen shall not be used for
this
task.
Flushing 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 ignition sources and there is ventilation available.

V-Design Series “Wall” Type R32 AC: Safety Precautions
IV
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2.16 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 minimi-
ze the amount of refrigerant contained in them.
Cylinders shall be kept upright.
Ensure that the refrigeration system is earthed prior to
charging the system with refrigerant.
Label the system when charging is complete (if not
already done).
Extreme care shall be taken not to overfill the refrige-
ration system.
Prior to recharging the system it shall be pressure
tested with OFN.
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.
2.17 Decommissioning
Before carrying out this procedure, it is essential that the
technician is completely familiar with the equipment and all its
detail.
It is recommended good practice that all refrigerants are re-
covered safely.
Prior to the task being carried out, an oil and refrigerant sample
shall be taken.
Prior to re-use of reclaimed refrigerant, analysis is required.
It is essential that electrical power is available before the task
is commenced.
Become familiar with the equipment and its operation.
Isolate system electrically.
Before attempting the procedure ensure that:
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Mechanical handling equipment is available, if requi-
red, 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.
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Pump down refrigerant in the system, if possible.
If a vacuum is not possible, make a manifold so that
refrigerant can be removed from various parts of the
system.
Make sure that cylinder is situated on the scales before
recovery takes place.
Start the recovery machine and operate in accordance
with manufacturer’s instructions.
Do not overfill cylinders. (No more than 80% volume
liquid charge).
Do not exceed the maximum working pressure of the
cylinder, even temporarily.
When the cylinders have been filled correctly and the
process is completed, make sure that the cylinders and
the equipment are removed from site promptly and all
isolation valves on the equipment are closed off.
Recovered refrigerant shall not be charged into another
refrigeration system unless it has been cleaned and
checked.
2.18 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.
2.19 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 em-
ployed.
Ensure that the correct numbers of cylinders for holding
the total system refrigerant 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.
Empty 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 weighting scales shall be
available and in good working order.
Hoses shall be complete with leak-free disconnect cou-
plings and in good condition.
Before using the recovery machine, check that it is in
satisfactory working order, it has been properly maintai-
ned 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 refrige-
rant supplier in the correct recovery cylinder, and the
relevant “Waste Transfer Note” was 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.
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V-Design Series “Wall” Type R32 AC: 1. Specications
[1]-1
1. SPECIFICATIONS
1.1 PRODUCT OVERVIEW
V-DESIGN DC INVERTER
Clean air, design, high performance
Wi-Fi control Simplicity of
installation Simplicity of maintenance
Conveniently control
air conditioners via
smartphone. HKM-Wi-
Fi is a simple, intuitive
app that allows users to
control air conditioning
wherever you are.
Available for iOS and
Android.
The condensate drain
pipe is characterised
by flexibility and the
possibility of two
applications (right and
left). The new layout of
the indoor unit mounting
brackets makes wall
application more secure.
V DESIGN wall unit
design facilitates all
maintenance, removal
and cleaning operations.
High density filter
These removed dust
and pollen by up to
80%, improving room air
quality.
The V-DESIGN colour
display allows for
at-a-glance
understanding of which
operating mode is
activated on the unit
(blue light for cooling,
orange light for heating).
Light effects Storing air flow
louvre position
When the V-Design
is switched back on,
this function allows
the horizontal flap to
maintain the same angle
tilt used and stored
during the last unit use.
Auto-brightness
When the room light
is off, the display goes
dark slowly after 5s, the
fan speed is reduced
and the buzzer goes into
silent mode. When the
room is back to light,
these functions resume
automatically according
to normal operation.
In both cooling and
heating modes, Turbo
function allows the user
to quickly reach desired
temperature to quickly
cool or heat rooms.
Turbo function
RESIDENTIAL R32

V-Design Series “Wall” Type R32 AC: 1. Specications
[1]-2
1.2 TECHNICAL DATA TABLES
RESIDENTIAL R32
V-DESIGN DC INVERTER
Dark silver
Wall
(optional)
1 EU Delegated Regulation No.626/2011 on the new labelling indicating the energy consumption of air conditioners. 2 EU Regulation No.206/2012 - - Value measured according to harmonised standard EN14825. 3 Value measured according to
harmonised standard EN14511. 4 Refrigerant leakage contributes to climate change. When released into the atmosphere, refrigerants with a lower global warming potential (GWP) contribute less to global warming than those with a higher GWP.
This appliance contains a refrigerant with a GWP of 675. If 1 kg of this refrigerant fluid were released into the atmosphere, therefore, the impact on global warming would be 675 times higher than 1 kg of CO2, over a period of 100 years. Under no
circumstances should the user try to intervene on the refrigerant circuit or disassemble the product. Always contact qualified personnel if necessary.
Characteristics
HKEU 262-352 ZAL-B
2.64~3.52 kW | 2 available power levels
A++/A+ | Seasonal energy efficiency class in cooling/
heating mode
6.7/4.0 (2.64 kW) | SEER/SCOP values
-15~50° C| -15~30° C | Operating range in cooling and
heating
21 dB(A) | Extremely quiet
182 mm deep | Compact dimensions
Installation flexibility | Up to 25 m splitting length and
10 m height difference between O.U. and I.U.
Indoor unit model HKEU 262 ZAL-B HKEU 352 ZAL-B
Outdoor unit model HCNI 262 ZA HCNI 352 ZA
Type DC-Inverter heat pump
Control (included) Remote control
Rated capacity (T=35°C)
Cooling
kW 2.64 (1.23~3.30) 3.52 (1.39~4.44)
Rated absorbed power (T=35°C) kW 0.71 (0.10~1.26) 1.21 (0.13~1.43)
Rated energy eciency coecient EER
3
3.72 2.91
Seasonal energy eciency class 626/2011
1
A++ A++
Seasonal energy eciency index SEER
2
6.7 6.1
Annual energy consumption kWh/a 141 206
Theoretical load (Pdesignc) kW 2.7 3.5
Rated capacity (T=7°C)
Heating
kW 2.93 (0.85~3.72) 3.81 (1.23~4.36)
Rated absorbed power (T=7°C) kW 0.77 (0.13-1.32) 1.34 (0.11-1.34)
Rated energy performance coecient COP
3
3.80 2.84
Energy eciency class (average season) 626/2011
1
A+ A+
Seasonal energy eciency class index (average season) SCOP
2
4.0 4.0
Annual energy consumption kWh/a 1015 1015
Theoretical load (Pdesignh) @-10° C kW 2.9 2.9
Operating limits (external temperature) Cooling °C -15~50 -15~50
Heating °C -15~30 -15~30
Electrical data
Power Outdoor unit Ph-V-Hz 1Ph - 220/240V - 50Hz
Power cable Type 3 x 2.5 mm
2
Connection wires between I.U. and O.U. no. 5 5
Rated absorbed current (min~max) Cooling A 3.1 (0.4~5.5) 5.3 (0.6-6.2)
Heating A 3.4 (0.5-5.7) 4.9 (0.5-5.8)
Maximum current A 10 10
Maximum absorbed power kW 2.2 2.2
Refrigerant circuit
Refrigerant (GWP)
4
R32 (675) R32 (675)
Quantity refrigerant pre-load Kg 0.8 0.8
Tons of CO2 equivalent t 0.540 0.540
Diameter of refrigerant piping on liquid/gas mm (inches) ø6.35(1/4") - ø9.52(3/8") ø6.35(1/4") - ø9.52(3/8")
Max splitting length m 25 25
Max height dierence I.U./O.U. m 10 10
Splitting length without additional load m 5 5
Additional load g/m 12 12
Indoor unit specications
Dimensions LxDxH mm 897x182x312 897x182x312
Net weight Kg 9.9 9.9
Sound pressure level (I.U.) Hi/Mi/Lo dB(A) 37.5/26/21 37.5/26/21
Sound power level (U.I.) Hi dB(A) 50 50
Handled air volume Hi/Mi/Lo m
3
/h 530/421/305 530/421/305
Motor power (Output) W 20 20
Specications of outdoor units
Dimensions LxDxH mm 770x300x555 770x300x555
Net weight Kg 27 27
Sound pressure level (O.U.) dB(A) 54 54
Sound power level (O.U.) dB(A) 63 63
Handled air (Max) m
3
/h 2000 2000
Motor power (Output) W 63 63
Optional parts
Wired remote control NO
Centralised control NO
Wi-Fi module HKM-WIFI
Standard remote control
with built-in temperature sensor
(Follow me function)

V-Design Series “Wall” Type R32 AC: 1. Specications
[1]-3
1.3 PIPE LENGTH AND DROP HEIGHT
Models Standard Length Max Pipe Length Max Elevation Additional R32 Charge
5m 25m 12g/m
10m
The length and elevation of connection pipe are shown in the table below.
If the pipe length exceeds max. pipe length corresponding to refrigerant precharge, additional refrigerant (R32) should be
charged to ensure nominal cooling/heating capacity and prevent any damages to the air conditioner.
If oil flows back into the outdoor unit’s compressor, this might cause liquid compression or deterioration of oil return. Oil traps in
the rising gas pipe can prevent this.
If indoor unit is installed higher than outdoor unit, oil trap should be set every 10m of vertical distance.
If the outdoor unit is installed higher than the indoor unit, proper oil should return to the compressor along with the suction of
refrigerant to keep lubrication of compressor.
If the suction flow velocity drops below 7.62m/s, oil won’t return to the compressor. An oil trap should be installed every 6m of
vertical distance.
1. Indoor unit is installed higher than outdoor unit 2. Outdoor unit is installed higher than indoor unit.
Gas piping
Oil trap
Outdoor unit
Liquid piping
Liquid piping
10m
10m
10m
10m
Gas piping
Oil trap
Outdoor unit
Indoor unit
Indoor unit
HKEU 262 ZAL-B
HCNI 352 ZA
HKEU 352 ZAL-B
HCNI 352 ZA

V-Design Series “Wall” Type R32 AC: 1. Specications
[1]-4
1.4 ELECTRICAL WIRING DIAGRAMS

Indoor Units: HKEU (262, 352) ZAL-B Models
Notes: 1. The wiring diagram is for explanation purose only. The actual shape of the components may be different. 2. Components inside the dotted-lines rectangles may be optional.
16022000030632
Yellow/Green
W 1(L) 2(N) S
Indoor Unit to Outdoor Unit
White
Red
Blue (or Black)
Yellow
N_IN CN31
L_IN
L_OUT
CN12 CN24 CN33
CN18 CN26
Display Board
Optional
Plasma
Optional
4(8) 2
P_1
5 5 5
53
M
Indoor Motor
Panel Motor
LED Board
CN22
Vertical Motor
Optional
CN19
Louver Motor
CN27
CN15
Pipe Temperature Sensor
ION Optional
Oxygen enrichment (anion generator)

V-Design Series “Wall” Type R32 AC: 1. Specications
[1]-5
Abbreviation Explanation
Y/G
ION
CAP
PLASMA
L
N
HEATER
T1
T2
Yellow-Green Conductor
Positive and Negative Ion Generator
Capacitor
Electronic Dust Collector
LIVE
NEUTRAL
The Electric Heating Belt of Indoor Unit
Indoor Room Temperature Sensor
Coil Temperature Sensor of Indoor Heat Exchanger
Indoor Units Abbreviations:

V-Design Series “Wall” Type R32 AC: 1. Specications
[1]-6
Outdoor Units: HCNI (262, 352) ZA Models
16022000019533
Notes:
1. The wiring diagram is for explanation purose only. The actual shape of the components may be different.
2. Components inside the dotted-lines rectangles may be optional.
3. As the standby control needs, the cross section area of cable connected to W, 1(L), 2(N) must be selected to suit the
maximum system current. The maximum system current is equal to the sum of indoor unit and outdoor unit rated current.
Reactor
1005AL
CN9
CN32
Optional
Blue or White
Blue
or White
Blue
Red
Black
Blue
Red
Black
Compressor
UVW
CN21
Optional
Discharge Temp. Sensor Condenser Temp. Sensor Outdoor air Temp. Sensor
DC-Fan
Optional
3
CN7 CN31
5/6
Electronic
Expansion Valve
Optional
Main Board
Yellow/
Green
Yellow/
Green
CN 1A
CN3 CN1 CN2
CN16
Blue
Yellow/
Green
Yellow or Black
Blue or Black
Red
W 1(L) 2(N) S L N
Optional
to Indoor Unit
Power Supply
1Ph, 220-240V, 50 Hz
CN60
Blue
CN17
Red
CN15
White
CN25
Optional
Optional
Yellow/
Green
Optional
Optional
Optional
4-Way
Optional
Crankcase
Heater
Pan
Heater
Capacitor
3/5 5
Optional
AC-Fan
CN30
CN29
CN28
CN50

V-Design Series “Wall” Type R32 AC: 1. Specications
[1]-7
Abbreviation Explanation
4-WAY
AC-FAN
DC-FAN
CT1
COMP
T3
T4
TH
TP
Gas Valve Assembly / 4-WAY VALVE
Alternating Current FAN
Direct Currente FAN
AC Current Detector
Compressor
Coil Temperature of Condenser
Outdoor Ambient Temperature
Compressor Suction Temperature
Compressor Discharge Temperature
Outdoor Units Abbreviations:
EEV
L-PRO
H-PRO
Electronic Expansion Valve
Low Pressure Switch
High Pressure Switch

V-Design Series “Wall” Type R32 AC: 2. Product Features
[2]-1
2. PRODUCT FEATURES
2.1 DISPLAY FUNCTION

Unit display functions:
Display
Function
Temperature
Room temperature
Activation of Timer ON, Fresh, Swing, Turbo, or Silent (3s)
Cancellation of Timer OFF, Fresh, Swing, Turbo, or Silent (3s)
Defrost
Warming in heating mode
Self-clean (available on select units only)
Heating in room temperature under 8°C
WiFi control (available on select units only)
ECO function (available on select units only)
V-shape light area:
Note:
Please select the display function according to your purchased product.
It lights up in different color, according to the operation mode:
• In (AUTO) COOL and DRY mode, the light is blue.
• In (AUTO) HEAT mode, the light is orange.
• The light is OFF in Fan mode.
• When room light is turned off, the display window will slowly darken after 5 seconds, and the buzzer will be turned off. It will
be
back to normal after the light is turned on.
V-shape light area
Temperature (Fan and Drying mode)
Set temperature value

V-Design Series “Wall” Type R32 AC: 2. Product Features
[2]-2
2.2 SAFETY FEATURES

Compressor 3-minute delay at restart
Compressor functions are delayed for up to 1 minute upon the first startup of the unit, and are delayed for up to 3 minutes upon
subsequent unit restarts.
Zero crossing detection error protection (except for DC fan units)
If AC cannot detect zero crossing signal for 4 minutes or the zero crossing signal time interval is not correct, the unit will stop and
the LED will display the failure.
The correct zero crossing signal time interval should be between 6-13ms.
Automatic shut-off based on discharge temperature
If the compressor discharge temperature exceeds a certain level for a period of time, the compressor ceases operation.
Automatic shut-off based on fan speed
If the indoor fan speed registers below 300RPM for an extended period of time, the unit ceases operation and the corresponding
error code is displayed on the indoor unit.
Inverter module protection
The inverter module has an automatic shut-off mechanism based on the unit’s current, voltage, and temperature. If automatic
shut-off is initiated, the corresponding error code is displayed on the indoor unit and the unit ceases operation.
Indoor fan delayed operation
• When the unit starts, the louver is automatically activated and the indoor fan will operate after a period of 7 seconds.
• If the unit is in heating mode, the indoor fan is regulated by the anti-cold wind function.
Sensor redundancy and automatic shut-off
• If one temperature sensor malfunctions, the air conditioner continues operation and displays the corresponding error code,
allowing for emergency use.
• When more than one temperature sensor is malfunctioning, the air conditioner ceases operation.
Refrigerant leakage detection
This function is active only when cooling mode is selected.
It will detect if the compressor is being damaged by refrigerant leakage or by compressor overload.
This is measured using the coil temperature of evaporator T2 when the compressor is in operation.

V-Design Series “Wall” Type R32 AC: 2. Product Features
[2]-3
2.3 BASIC FUNCTIONS
2.3.1 Table
Note:
The detailed description of Case 1 or Case 2 is shown in the following function sections (from 2.3.4 to
2.3.6).
Functions
Cooling Mode & Heating Mode Heating Mode
Auto Mode
Outdoor Fan Control Defrosting Mode
Cases
Case 1: Compressor
Frequency and T4
Case 2:
T4
Case 1: T3 and T4,
15 min
Case 2: T3,
10 min
A = 2°C
B = -2°C
Models
HKEU 262 ZAL-B
HKEU 352 ZAL-B

V-Design Series “Wall” Type R32 AC: 2. Product Features
[2]-4
Unit element abbreviations:
Abbreviation Element
T1 Indoor room temperature.
T2 Coil temperature of evaporator.
T3 Coil temperature of condenser.
T4 Outdoor ambient temperature.
TS Set temperature.
Td Control target temperature.
TP Compressor discharge temperature.
Setting fan speed Actual fan speed
H+ (H+ = H+G)
M+ (M+ = M + Z)
H- (H- = H-G)
AH (H = H)
B
C
D
E
F
G
H
I
M (M = M)
L+ (L+ = L+D)
L- (L- = L - D)
H
M
L
a
b
c
d
T1-Td
e
2.3.2 Abbreviation
In this manual, such as TCE1, TCE2... etc., they are well-
setting parameter of EEPROM.
2.3.3 Fan Mode
When fan mode is activated:
• The outdoor fan and compressor are stopped.
• Temperature control is disabled and no temperature setting
is displayed.
• The indoor fan speed can be set to high, medium, low, or
auto.
• The louver operations are identical to those in cooling mode.
• Auto fan: In fan-only mode, AC operates the same as auto
fan in cooling mode with the temperature set at 24°C.
2.3.4 Cooling Mode
2.3.4.1 Compressor Control
Cooling temperature compensation (∆T5) is a well-setting
parameter of EEPROM. Its value ranges from -2°C to 2°C.
The default value is 0.
• When T1-Ts < ∆T5-2°C, the compressor ceases operation.
• When T1-Ts > ∆T5+3°C, the compressor continues opera-
tion.
• When the AC is operating in mute (silent) mode, the
compressor operates at a low frequency.
• When the current exceeds the preset value, the current
protection function activates and the compressor ceases
operation.
2.3.4.2 Indoor Fan Control
• In cooling mode, the indoor fan operates continuously. The
fan speed can be set to high, medium, low, or auto.
• If the compressor ceases operation when the configured
temperature is reached, the indoor fan motor operates at the
minimum or configured speed.
• The indoor fan is controlled as below:
T1-Td °C
M- (M- = M - Z)
L (L = L)
• The auto fan acts as below rules:
2.3.4.3 Outdoor Fan Control
Case 1:
• The outdoor unit will be run at different fan speed according
to T4 and compressor frequency.
• For different outdoor units, the fan speeds are different.
Case 2:
• The outdoor unit will be run at different fan speed according
to T4.
• For different outdoor units, the fan speeds are different.
2.3.4.4 Condenser Temperature Protection
When condenser temperature is higher than setting value,
the compressor ceases operation.
2.3.4.5 Evaporator Temperature Protection
When evaporator temperature drops below a configured
value, the compressor and outdoor fan cease operation.
2.3.5 Heating Mode
2.3.5.1 Compressor Control
Heating temperature compensation (∆T3) is a well-setting
parameter of EEPROM. Its value ranges from -6°C to 6°C.
• When T1-Ts > -∆T3, the compressor ceases operation.
• When T1-Ts < -∆T3-1.5°C, the compressor continues ope-
ration.
• When the AC is operating in mute (silent) mode, the
compressor operates at a low frequency.
• When the current exceeds the preset value, the current
protection function activates and the compressor ceases
operation.
2.3.5.2 Indoor Fan Control
• When the compressor is on, the indoor fan speed can be set
to high, medium, low
, or auto. And the anti-cold wind function
has the priority.
• Anti-cold air function:
• The indoor fan is controlled by the indoor temperature T1
and indoor unit coil temperature T2.
T2
Setting fan speed
H
M+
M
L
Super slow
Fan off
TEL0
TEL0 +23 -
∆ TE1
TEL0 +21 -
∆ TE1
TEL0 +19 -
∆ TE1
TEL0 +17 -
∆ TE1
TEL0 +15 -
∆ TE1
TEL0 +13 -
∆ TE1
TEL0 +18 -
∆ TE1
TEL0 +16 -
∆ TE1
TEL0 +14 -
∆ TE1
TEL0 +12 -
∆ TE1
TEL0 +10 -
∆ TE1

V-Design Series “Wall” Type R32 AC: 2. Product Features
[2]-5
Actual fan speed
L
H
M
T1-Td
• When the indoor temperature T1 reaches the setting tempe-
rature, the compressor will stop, the indoor fan motor runs at
the minimum speed or setting speed. (The anti-cold air fun-
ction is valid).
• The indoor fan is controlled as below:
T1 ≥19°C ΔTE1 = 0
15°C ≤T1 ≤18°C ΔTE1 = 19°C-T1
T1 < 15°C ΔTE1 = 4°C
T1-Td °C
Setting fan speed
H+ (H+ = H+G)
M+ (M+ = M + Z)
H- (H- = H-G)
H (H = H)
M (M = M)
L+ (L+ = L+D)
L- (L- = L - D)
M- (M- = M - Z)
L (L = L)
• Auto fan action in heating mode:
2.3.5.3 Outdoor Fan Control:
Case 1:
• The outdoor unit will be run at different fan speed according
to T4 and compressor frequency.
• For different outdoor units, the fan speeds are different.
Case 2:
• The outdoor unit will be run at different fan speed according
to T4.
• For different outdoor units, the fan speeds are different.
• If any one of the following conditions is satisfied, defrosting
ends and the machine switches to normal heating mode:
• T3 rises above TCDE1.
• T3 maintained above TCDE2 for 80 seconds.
• Unit runs for 15 minutes consecutively in defrosting
mode.
Case 2:
• The unit enters defrosting mode according to the temperatu-
re value of T3 as well as the compressor running time.
• In defrosting mode, the compressor continues to run, the
indoor and outdoor motor will cease operation, the defrost
light of the indoor unit will turn on, and the “ ” symbol is
displayed.
2.3.5.4 Defrosting mode
Case 1:
• The unit enters defrosting mode according to the temperatu-
re value of T3 and T4 as well as the compressor running time.
• In defrosting mode, the compressor continues to run, the
indoor and outdoor motor will cease operation, the defrost
light of the indoor unit will turn on, and the “ ” symbol is
displayed.
Running mode
∆T > ACooling
Fan-only
∆T < B Heating*
• If any one of the following conditions is satisfied,
defrosting
ends and the machine switches to normal heating mode:
• T3 rises above TCDE1.
• T3 is maintained above TCDE2 for 80 seconds.
• Unit runs for 10 minutes consecutively in
defrosting
mode.
2.3.5.5 Evaporator Temperature Protection
When the evaporator temperature exceeds a preset protec-
tion value, the compressor ceases operation.
2.3.6 Auto-mode
• This mode can be selected with the remote controller
and
the setting temperature can be changed between
17°C-
30°C.
• In auto mode, the machine selects cooling, heating,
or
fan-only mode on the basis of ∆T (∆T =T1-TS).
(Heating*: In auto mode, cooling only models run the fan.)
• Indoor fan will run at auto fan speed.
• The louver operates same as in relevant mode.
• If the machine switches mode between heating and
cooling,
the compressor will keep stopping for certain time and
then
choose mode according to ∆T.
∆T
B°C ≤ ∆T ≤ A
2.3.7 Drying mode
• Indoor fan speed is fixed at breeze and can’t be
changed.
The louver angle is the same as in cooling mode.
• All protections are active and the same as that in
cooling
mode.
2.3.8 Forced operation function
Press the AUTO/COOL button, the AC will run as in
below
sequence:
Forced auto → Forced cooling → Off

V-Design Series “Wall” Type R32 AC: 2. Product Features
[2]-6
• Forced auto mode:
Forced auto mode operates the same as normal auto mode
with a preset temperature of 24°C.
• The unit exits forced operation when it receives the following
signals:
• Switch on.
• Switch off.
• Timer on.
• Timer off.
• Changes in:
- Mode.
- Fan speed.
- Sleep mode.
- Follow me.
• Forced defrosting mode:
• Press AUTO/COOL button continuously for 5 sec. under
forced cooling mode to enter this mode.
• Indoor fan will stop, defrosting lamp will light on.
• Quit this mode and turn off the unit when:
- Quit normal defrosting.
- Turn off by RC.
- Press AUTO/COOL button continuously for 5 sec. again.
2.3.9 Sleep function
• The sleep function is available in cooling, heating, or auto
mode.
• The operational process for sleep mode is as follows:
• When cooling, the temperature rises 1°C (to not higher
than 30°C) every hour. After 2 hours, the temperature
stops rising and the indoor fan is fixed at low speed.
• When heating, the temperature decreases 1°C (to not
lower than 17°C) every hour. After 2 hours, the temperatu-
re stops decreasing and the indoor fan is fixed at low
speed. Anti-cold wind function takes priority.
• The operating time for sleep mode is 8 hours, after which
the unit exits this mode and does not switch off.
2.3.10 Auto-Restart function
• The indoor unit has an auto-restart module that allows the
unit to restart automatically.
The module automatically stores the current settings (not
including the swing setting) and, in the case of a sudden
power failure, it will restore those setting automatically within
3 minutes after power returns.
• If the unit was in forced cooling mode, it will run in this
mode for 30 minutes and turn to auto mode with temperatu-
re set to 24°C.
• If there is a power failure while the unit is running, the
compressor starts 3 minutes after the unit restarts. If the unit
was already off before the power failure, the compressor
starts 1 minute after the unit restarts.
• Forced cooling mode:
The compressor and outdoor fan continue to run and the
indoor fan runs at breeze speed. After running for 30 minutes,
the AC will switch to auto mode with a preset temperature of
24°C.
2.3.11 Refrigerant Leakage Detection
With this new technology, the display area will show “EC”
when the outdoor unit detects refrigerant leakage.
2.3.12 Ionizer / Plasma (for some models)
Press “Fresh” for at least 2 seconds on the remote control to
enable the IONIZER function.
While this function is active, the Ionizer / Plasma Dust Collec-
tor (depending on models) is energized and will help to
remove pollen and impurities from the air.

V-Design Series “Wall” Type R32 AC: 2. Product Features
[2]-7
2.4 OPTIONAL FUNCTIONS
2.4.1 8°C Heating
In heating mode, the temperature can be set to as low as 8°C,
preventing the indoor area from freezing if unoccupied during
severe cold weather.
2.4.2 Self Clean
• If you press “Self Clean” when the unit is in cooling or drying
mode:
• For cooling only models, the indoor unit will run in low fan
mode for a certain time, then ceases operation.
• For heat pump models, the indoor unit will run in fan-only
mode, then low heat, and finally in fan-only mode.
• Self Clean function keeps the indoor unit dry and prevents
mold growth.
• When match with multi outdoor unit, this function is disa-
bled.
2.4.3 Follow Me
• If you press “Follow Me” on the remote, the indoor unit will
beep. This indicates the follow me function is active.
• Once active, the remote control will send a signal every 3
minutes, with no beeps. The unit automatically sets the
temperature according to the measurements from the re-
mote control temperature sensor.
• The unit will only change modes if the information from the
remote control makes it necessary, not from the unit’s
temperature setting.
• If the unit does not receive a signal for 7 minutes or you
press “Follow Me,” the function turns off. The unit regulates
temperature based on its own sensor and settings.
2.4.4 SILENCE
• Press “Silence” on the remote control to enable the SILEN-
CE function.
While this function is active, the compressor frequency is
maintained at a lower level than F2. The indoor unit will run
at faint breeze, which reduces noise to the lowest possible
level.
• When indoor unit is matched with multi outdoor unit, this
function is disabled.