Hitachi airCore 700 Instruction Manual

–
OPERATION
INSTALLATION
& MAINTENANCE
MANUAL
–
SINGLE SPLIT
INVERTER SERIES
INDOOR UNITS
MODELS
HIGH ESP DUCTED TYPE
PPIH-3.0UFA1NQ
PPIH-4.0UFA1NQ
PPIH-5.0UFA1NQ
PPIH-6.0UFA1NQ
PPIH-6.5UFA1NQ
EN INSTRUCTION MANUAL
P02131Q
Scan the code to get the electronic manual.

-i-
IMPORTANT NOTICE
• Hitachi pursues a policy of continuous improvement in design and performance of products. The right
is therefore reserved to vary specications without notice.
• Hitachi cannot anticipate every possible circumstance that might involve a potential hazard.
• This heat pump air conditioner is designed for human comfort air conditioning only. Do not use this
heat pump air conditioner for other purposes such as drying clothes, refrigerating foods or for any other
cooling or heating purposes.
•
Signal words (DANGER, WARNING, CAUTION, NOTICE, NOTE) are used to identify levels of hazard seriousness.
Denitions for identifying hazard levels are provided below with their respective signal words.
DANGER
!
: DANGER indicates a hazardous situation which, if not avoided, will result in
death or serious injury.
WARNING
!
: WARNING indicates a hazardous situation which, if not avoided, could result in
death or serious injury.
CAUTION
!
:
CAUTION indicates a hazardous situation which, if not avoided, could result in
minor or moderate injury.
NOTICE
: NOTICE is used to address practices not related to physical injury.
NOTE:NOTE is useful information for operation and/or maintenance.
• Do not install the unit in the place where silicon gas dris. If the silicon gas attaches to the surface of
heat exchanger, the n surface repels water. As a result, drain water splashes outside of the drain pan
and splashed water runs inside of electrical box. In the end, water leakage or electrical devices failure
may occur.
• Pay attention to the following points when the unit is installed in a hospital or other facilities where an
electromagnetic wave generates from a medical equipment.
○Do not install the unit in the place where an electromagnetic wave is directly radiated to the electrical
box, remote control cable or remote control switch.
○Install the unit at least 3 meters away from an electromagnetic wave such as a radio.
• This unit shall be installed in accordance with local codes and regulations.
• The installer and system specialist shall ensure safety against the refrigerant leakage according to
local regulations or standards. The following standards may be applicable, if local regulations are not
available. International Organization for Standardization, ISO5149 or European Standard, EN378 or
Japan Standard, KHKS0010.
• No part of this manual may be reproduced without written permission.
• It is assumed that this heat pump air conditioner will be operated and serviced by persons conversant
in English. If this is not the case, the distributor should add safety, caution and operating signs in the
native language.
• If you have any questions, contact your distributor or dealer of Hitachi.
• This manual gives a common description and information for this heat pump air conditioner which you
operate as well for other models.
•
This system has been designed and tested to operate within the indoor temperature limits as stated
below. The manufacturer cannot guarantee satisfactory performance if the unit is operated for
prolonged periods outside of these limits.
oC
Temperature Range Maximum Minimum
Cooling Operation 32 DB/23 WB 21 DB/15 WB
Heating Operation 27 DB 20 DB
DB: Dry Bulb , WB: Wet Bulb

-ii-
• This manual should be considered as a permanent part of the air conditioning equipment and should
remain with the air conditioning equipment.
DANGER
!
• Do not install pipe work with diameters that are not specied for that model.
• Do not ground units to water pipes, gas pipes, telephone wires, or lightning rods as incomplete
grounding can cause a severe shock hazard resulting in severe injury or death. Additionally, grounding
to gas pipes could cause a gas leak and potential explosion causing severe injury or death.
• Do not install unit in an area where ammable materials are present due to risk of explosions that can
cause serious injury or death.
• Safely dispose all packing and transportation materials in accordance with federal/state/local laws or
ordinances. Packing materials such as nails and other metal or wood parts, including plastic packing
materials used for transportation may cause injuries or death by suocation.
• Refrigerant gas is heavier than air and replaces oxygen. A massive leak can lead to oxygen depletion,
especially in basements, and an asphyxiation hazard could occur leading to serious injury or death.
• If refrigerant gas leaks during installation, ventilate the area immediately. Refrigerant gas may produce
toxic gas if it comes into contact with re. Exposure to this gas could cause severe injury or death.
WARNING
!
• Assure that the maximum operating pressure is checked when connecting to Outdoor UNIT.
• This unit <PPIH-UFA1NQ> is a PARTIAL UNIT AIR CONDITIONER, shall only be connected to an appliance
suitable for the same refrigerant.
• This unit <PPIH-UFA1NQ> is a PARTIAL UNIT AIR CONDITIONER, complying with PARTIAL UNIT
requirements of IEC 60335-1 and IEC 60335-2-40, and must only be connected to other units that have
been conrmed as complying to corresponding PARTIAL UNIT requirements of IEC 60335-1 and IEC
60335-2-40.
• Only qualied personnel licensed or certied in their jurisdiction must carry out the installation work.
Installation must be done in accordance with this installation manual. Improper installation may result
in water leakage, electric shock, or re.
• Pipe work and installation shall be also in compliance with national codes.
• Use only specied accessories and parts for installation work. Failure to use specied parts may result
in water leakage, electric shock, re, or the unit falling.
• Install the air conditioner or heat pump on a foundation strong enough that it can withstand the weight
of the unit. A foundation of insuicient strength may result in the unit falling and causing injuries.
• Take into account strong winds, typhoons, or earthquakes when installing. Improper installation may
result in the unit falling and causing accidents.
• Make sure that a separate power supply circuit is provided for this unit and that all electrical work is
carried out by qualied personnel licensed or certied in their jurisdiction according to local, state, and
national regulations. An insuicient power supply capacity or improper electrical construction may
lead to electric shock or re.
• Make sure that all wiring is secured, that specied wires are used, and that no external forces act on the
terminal connections or wires. Improper connections or installation may result in re.
• When wiring, position the wires so that the electrical wiring box cover can be securely fastened.
Improper positioning of the electrical wiring box cover may result in electric shock, re, or the terminals
overheating.

-iii-
• Before touching electrical parts, turn o the unit.
• The circuit must be protected with safety devices in accordance with local and national codes, i.e. a
circuit breaker.
• Securely fasten the outdoor unit terminal cover (panel). If the terminal cover/panel is not installed
properly, dust or water may enter the outdoor unit causing re or electric shock.
• When a re occurs, cut o the power supply immediately.
CAUTION
!
• Do not touch the switch with wet ngers. Touching a switch with wet ngers can cause electric shock.
• This appliance is not intended for use by persons (including children) with reduced physical, sensory or
mental capabilities, or lack of experience and knowledge, unless they have been given supervision or
instruction concerning use of the appliance by a person responsible for their safety. Children should be
supervised to ensure that they do not play with the appliance.
• Wear adequate personal protective equipment (protective gloves, safety glasses,…) when installing,
maintaining or servicing the system.
• The heat exchanger ns are sharp enough to cut. To avoid injury, wear gloves or cover the ns while
working around them.
• Do not touch the refrigerant pipes during and immediately aer operation as the refrigerant pipes may
be hot or cold, depending on the condition of the refrigerant owing through the refrigerant piping,
compressor, and other refrigerant cycle parts. Your hands may suer burns or frostbite if you touch the
refrigerant pipes. To avoid injury, give the pipes time to return to normal temperature or, if you must
touch them, be sure to wear proper gloves.
• Install drain piping to ensure proper drainage. Improper drain piping may result in water leakage and
property damage.
• Insulate piping to prevent condensation.
• Be careful when transporting the product.
• Do not install the air conditioner or heat pump in the following locations:
○Where a mineral oil mist or oil spray or vapor is produced, for example, in a kitchen. Plastic parts may
deteriorate and fall off or result in water leakage.
○Where corrosive gas, such as sulfurous acid gas, is produced. Corroding copper pipes or soldered
parts may result in refrigerant leakage.
○Near machinery emitting electromagnetic waves. Electromagnetic waves may disturb the operation
of the control system and cause the unit to malfunction.
○Where flammable gas may leak, where there is carbon fiber, or ignitable dust suspension in the air,
or where volatile flammables such as thinner or gasoline are handled. Operating the unit in such
conditions can cause a fire.
• Take adequate measures to prevent the outdoor unit from being used as a shelter by small animals.
Small animals making contact with electrical parts can cause malfunctions, smoke, or re. Instruct the
user to keep the area around the unit clean.
• 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. Cleaning and user maintenance shall not be made by children without supervision.
• Use shielded wires of operation line between the indoor and the outdoor unit. And connect the shielded
part to the earth screw in the electrical box of the indoor unit as shown in the Fig. 1.

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ATransmissionRCS
L-1
N-1
TB1
B12
TB2
ATransmissionRCS
L-1
N-1
TB1
B12
TB2
NL
NL
NL
NL
Earth for Operating Line,
Wired Controller and Remote Sensor
Earth for Power Supply Line
Power Supply Line
Operating Line
Wired Controller and Remote Sensor
(Shielded Twist Pair Cable)
(Shielded Twist Pair Cable)
Fig.1 Earth Wiring
NOTES:
• The indoor unit should be positioned where the unit and interunit wires (outdoor to indoor) are at least
3.3 (1m) away from any televisions or radios. (The unit may cause interference with the picture or
sound.) Depending on the radio waves, a distance of 3.3 (1m) may not be suicient to eliminate the
noise.
• Dismantling the unit, treatment of the refrigerant, oil and additional parts must be done in accordance
with the relevant local, state, and national regulations.
• As maximum allowable pressure is 4.15MPa, minimum allowable pressure is 2.21MPa, the wall
thickness of eld-installed pipes should be selected in accordance with the relevant local, state, and
national regulations.
Explanation of symbols displayed on the indoor unit or outdoor unit
WARNING
These symbols shows that appliance uses a flammable refrigerant. If the
refrigerant is leaked and exposed to an external ignition source, there is
a risk of fire.
CAUTION This symbol shows that the operation manual should be read carefully.
CAUTION This symbol shows that a service personnel should be handling this
equipment with reference to the installation manual.
CAUTION This symbol shows that information is available such as the operating
manual or installation manual.
Correct Disposal of this product
This marking indicates that this product should not be disposed with other household
wastes. To prevent possible harm to environment or human health from uncontrolled
waste disposal, recycle it responsibly to promote the sustainable reuse of material
resources. To return your used device, please use the return and collection systems or
contact the retailer where the product was purchased. They can take this product for
environmental safe recycling.

-v-
Precautions for R32
This air conditioner uses R32 ammable refrigerant. Air conditioner with R32 refrigerant, if not be
treated carefully, may cause serious harm to the human body or surrounding things. Please read the
following instructions carefully before installing, using and maintaining.
WARNING
!
• Do not use means to accelerate the defrosting process or to clean, other than those recommended by
the manufacturer.
• The appliance shall be stored in a room without continuously operating ignition sources (for example:
open ames, an operating gas appliance or an operating electric heater).
• Do not pierce or burn the refrigerant system to avoid the leakage.
• Be aware that refrigerants might not contain an odour.
• Do not charge R32 into system other than those designated for R32.
Do not charge R32 system with oil other than those designated for R32.
• Do not use a reclaim cylinder other than an R32 reclaim cylinder.
• Be sure to only use refrigerant piping approved for use with R32 refrigerant. The use of unapproved
piping may result in explosive rupture.
• The pipe-work shall be securely mounted and guarded from physical damage.
• The national gas regulations shall also be observed when eld-installed refrigerant pipes are required.
• 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. No leak shall be detected; Mechanical connections shall be accessible for
maintenance purposes.
• The joints shall not be reused, unless aer re-aring the pipe.
• Joints made in the installation between parts of the refrigerating system, with outdoor part charged,
shall be made in accordance with the following.
○A brazed, welded, or mechanical connection shall be made before opening the valves to permit
refrigerant to flow between the refrigerating system parts. A vacuum valve shall be provided to
evacuate the interconnecting pipe and/or any uncharged refrigerating system part.
○Mechanical connectors used indoors shall comply with ISO 14903. When mechanical connectors are
reused indoors, sealing parts shall be renewed. When flared joints are reused indoors, the flare part
shall be re-fabricated.
○Refrigerant tubing shall be protected or enclosed to avoid damage.
• That aer completion of eld piping for split systems, the eld pipework shall be pressure tested
with an inert gas and then vacuum tested prior to refrigerant charging, according to the following
requirements:
○The minimum test pressure for the low side of the system shall be the low side design pressure and
the minimum test pressure for the high side of the system shall be the high side design pressure,
unless the high side of the system, cannot be isolated from the low side of the system in which case
the entire system shall be pressure tested to the low side design pressure.
• The appliance shall be stored in a well-ventilated area where the room size corresponds to the room
area as specied.
• The appliances are designed for use at altitudes less than 2000m, may cause serious harm to the
human body or surrounding things if used at altitudes 2000m and above.
• Keep any required ventilation openings clear of obstruction, don’t block air inlet or air outlet,
Otherwise, the cooling or heating capacity will be weakened, even cause system stop operating or

-vi-
safety hazard.
• Maintenance or repair of air conditioner using R32 refrigerant must be carried out aer security check
to minimize risk of incidents.
• Ensure no following objects under the indoor unit:
○Microwaves, ovens and other hot objects.
○Computers and other high electrostatic appliances.
○Sockets that plug frequently.
• Installation, maintenance, service, repairing, removing and disposal operations, shall only be
performed by the qualied personnel or recommended by the manufacturer.
• Every working procedure that aects safety means shall only be carried out by competent persons.
Examples for such working procedures are:
○breaking into the refrigerating circuit;
○opening of sealed components;
○opening of ventilated enclosures.
• Precautions shall be taken to avoid excessive vibration or pulsation to refrigerating piping for the
transport and installation.
• Protection devices, piping and ttings shall be protected as far as possible against adverse
environmental eects, for example the danger of water collecting and freezing in relief pipes or the
accumulation of dirt and debris.
• When installing or repairing the air conditioner and the connecting line is not long enough, the entire
connecting line shall be replaced with the connecting line of the original specication; extension is not
allowed.
• Refrigerating systems shall be so installed as to minimize the likelihood of hydraulic shock damaging
the system.
• The appliance shall be stored and installed so as to prevent mechanical damage from occurring.
• Work shall be undertaken under a controlled procedure so as to minimise the risk of a ammable gas or
vapour being present while the work is being performed.
• All maintenance sta and others working in the local area shall be instructed on the nature of work
being carried out. Work in conned spaces shall be avoided.
• The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure
the non-existence of potentially toxic or ammable atmospheres. Ensure that the leak detection
equipment being used is suitable for use with all applicable refrigerants, i.e. nonsparking, adequately
sealed or intrinsically safe.
• If any hot work is to be conducted on the refrigerating equipment or any associated parts, appropriate
re extinguishing equipment shall be available to hand. Have a dry powder or CO2 re extinguisher
adjacent to the charging area.
• No person carrying out work in relation to a refrigerating system which involves exposing any pipe work
shall use any sources of ignition in such a manner that it can lead to the risk of re or explosion. All
possible ignition sources, including cigarette smoking, should be kept suiciently far away from the site
of installation, repairing, removing and disposal, during which 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 ammable hazards or ignition risks. "No Smoking" signs shall be displayed.
• 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.

-vii-
• Anti-static precautions is necessary for installing and maintenance, for example, wear pure cotton
clothes and gloves.
• If R32 refrigerant leakage occurs during the installation, operators shall immediately detect the
concentration in indoor environment until it reaches a safe level. If the leakage aects the performance
of the machine, please immediately stop the operation, and the air conditioner must be vacuumed
rstly and be returned to the maintenance station for processing.
• Where electrical components are being changed, they shall be t for the purpose and to the correct
specication. At all times the maintenance and service guidelines of this manual shall be followed. If in
doubt, consult the manufacturer’s technical department for assistance. The following checks shall be
applied to installations using R32:
○The refrigerant charge is in accordance with the room size within which the refrigerant containing
parts are installed.
○The ventilation machinery and inlets and outlets are operating adequately and are not obstructed;
and shall keep away from heat source, inflammable or explosive conditions.
○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 can 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.
• 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 no live electrical components and wiring are exposed while charging, recovering or purging the
system.
○that there is continuity of earth bonding.
• Sealed electrical components shall not be repaired.
• Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges or
any other adverse environmental eects. The check shall also take into account the eects of aging or
continual vibration from sources such as compressors or fans.
• Under no circumstances shall potential sources of ignition be used in the searching for or detection of
refrigerant leaks. A halide torch (or any other detector using a naked ame) shall not be used.
• Air-tightness test shall be carried out as guaranteed. Charging oxygen, acetylene or other inammable
and toxic gases during leakage inspection and air-tightness test may lead to explosions. It recommended
to use nitrogen gas for this test.
• The following leak detection methods are deemed acceptable for all refrigerant systems.
○Electronic leak detectors may be used to detect refrigerant leaks but, in the case of flammable
refrigerants, the sensitivity can be inadequate, or can 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 (no more than 25 %) is confirmed.
○The fluid used in leak detection is applicable to most refrigerants. But do not use chloride solvents to
prevent the reaction between chlorine and refrigerants and the corrosion of copper pipeline.
○If a leak is suspected, all naked flames shall be removed/extinguished.

-viii-
○If a leakage of refrigerant is found which requires brazing, all of the refrigerant shall be recovered
from the system, or isolated in a part of the system remote from the leak. Removal of refrigerant shall
be according to this manual.
• When breaking into the refrigerant circuit to make repairs – or for any other purpose – conventional
procedures shall be used. However, for ammable refrigerants it is important that best practice is
followed since ammability is a consideration. The following procedure shall be adhered to:
○safely remove refrigerant following local and national regulations;
○evacuate;
○purge the circuit with inert gas;
○continuously flush with inert gas when using flame to open circuit;
○open the circuit.
• The refrigerant charge shall be recovered into the correct recovery cylinders.
• Purging of the refrigerant circuit shall be achieved by breaking the vacuum in the system with inert gas
and continuing to ll until the working pressure is achieved, then venting to atmosphere, and nally
pulling down to a vacuum. This process shall be repeated until no refrigerant is within the system. The
system shall be vented down to atmospheric pressure to enable work to take place.
• Ensure that the outlet of the vacuum pump is not close to any potential ignition sources and that
ventilation is available.
• 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 minimise 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 labelled).
○Extreme care shall be taken not to overfill the refrigerating system.
• Prior to recharging the system, it shall be pressure-tested with the appropriate purging gas. 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.
• Before carrying out the decommissioning 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 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.
○Become familiar with the equipment and its operation.
○Isolate system electrically.
○Before attempting the procedure, ensure that:
(a) mechanical handling equipment is available, if required, for handling refrigerant cylinders;
(b) all personal protective equipment is available and being used correctly;
(c) the recovery process is supervised at all times by a competent person;
(d) recovery equipment and cylinders conform to the appropriate standards.
○Pump down refrigerant 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 the cylinder is situated on the scales before recovery takes place.
○Start the recovery machine and operate in accordance with 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 completed, make sure that the

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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 refrigerating system unless it has been
cleaned and checked.
• Equipment shall be labelled stating that it has been de-commissioned and emptied of refrigerant. The
label shall be dated and signed. For appliances containing ammable refrigerants, ensure that there are
labels on the equipment stating the equipment contains ammable refrigerant.
• When removing refrigerant from a system, either for servicing or decommissioning, it is required to
follow good practice so 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 is
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-o 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 the ammable refrigerant. Consult
manufacturer if in doubt. 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.
• The recovered refrigerant shall be processed according to local legislation 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 ammable refrigerant does not remain within the lubricant. The
compressor body shall not be heated by an open ame or other ignition sources to accelerate this
process. Draining of oil from a system shall be carried out safely.
• Disposal of equipment shall follow the national regulations.
• The storage of the appliance should be in accordance with the applicable regulations or instructions,
whichever is more stringent.
• The maximum number of pieces of equipment permitted to be stored together notes by each product
package information and standard following ISO 780-2015.
•
Aer completing the installation work, check that the refrigerant gas does not leak throughout the system.
• When installing the unit in a small room, take measures to keep the refrigerant concentration from
exceeding allowable safety limits. Excessive refrigerant leaks, in the event of an accident in a closed
ambient space, can lead to oxygen deciency.
• When installing or relocating the air conditioner, do not let any other substances besides R32, such as
air, enter the refrigerant circuit. The presence of air or foreign matter in the refrigerant circuit causes an
abnormal pressure rise, which may result in equipment damage and even injury.
• Refrigerant R32 in the system must be kept clean, dry, and tight.
○Clean and Dry -- Foreign materials (including mineral oils such as SUNISO oil or moisture) should be
prevented from getting into the system.
○Tight -- R32 does not contain any chlorine, does not destroy the ozone layer, and does not reduce the
earth’s protection again harmful ultraviolet radiation. R32 can contribute to the greenhouse effect if
it is released.
• Only use tools for R32, such as a gauge manifold, charge hose, gas leak detector, reverse ow check
valve, refrigerant charge base, vacuum gauge, or refrigerant recovery equipment.

-x-
• If the conventional refrigerant and refrigerator oil are mixed in R32, the refrigerant may deteriorate.
• For Ducts indoor units, it shall not contain a potential ignition source in the duct system, such as
electrical heating.
• For Duct indoor units, when connected via an air duct system to one or more rooms, the supply and
return air shall be directly ducted to the space. Open areas such as false ceilings shall not be used as a
return air duct.
• Duct indoor units that connected via an air duct system to one or more rooms, auxiliary devices which
can be a potential ignition source shall not be installed in the ductwork. Examples of such potential
ignition sources are hot surfaces and electric switching devices.
• Duct indoor units that connected via an air duct system to one or more rooms are installed in a
room with an area less than Amin [Amin(m2) - see table below], that room shall be without continuously
operating open ames (for example an operating gas appliance) or other potential ignition sources (for
example an operating electric heater, hot surfaces). A ame-producing device may be installed in the
same space if the device is provided with an eective ame arrestor.
• Appliance shall be installed, operated and stored in a room with a oor area larger than Amin (m2) [Amin(m2)
- see table below].
• The installation of pipe-work shall be kept to a room with a oor area larger than Amin(m2) [Amin(m2) - see
table below].
• The unit has requirements on the minimum required room area (Amin) used with dierent refrigerant
charging amount (m). The total amount of refrigerant charged in the system corresponds to the room
area installed in the table below. The calculation result is based on the Ducted-mounted unit, and the
installation height is no less than 2.2m.
Minimum required room area for each refrigerant amount charged
Ducted-mounted units
(No sensor, each room shall be assessed separately)
Installation Height:2.2m
m(kg) Amin(m2) m(kg) Amin(m2)
≤1.842 -3.40 10.068
1.843 5.458 3.60 10.660
2.00 5.922 3.80 11.253
2.20 6.515 4.00 11.845
2.40 7.107 4.20 12.437
2.60 7.699 4.40 13.029
2.80 8.291 4.60 13.622
3.00 8.884 4.80 14.585
3.20 9.476 5.00 15.826
CHECKING PRODUCT RECEIVED
• Upon receiving this product, inspect it for any shipping damage. Claims for damage, either apparent or
concealed, should be led immediately with the shipping company.
• Check the model number, electrical characteristics (power supply, voltage and frequency) and
accessories to determine if they are correct.
The standard utilization of the unit shall be explained in these instructions. Therefore, the utilization of
the unit other than those indicated in these instructions is not recommended. Please contact your local
agent, as the occasion arises.
Hitachi’s liability shall not cover defects arising from the alteration performed by a customer without
Hitachi’s consent in a written form.

-xi-
Table of Contents
1. Safety Summary .............................................................................................................................................1
2. Structure .........................................................................................................................................................3
2.1 Name of Parts ...........................................................................................................................................3
2.2 Necessary Tools and Instrument List for Installation.............................................................................4
3. Transportation and Handling ........................................................................................................................4
3.1 Transportation..........................................................................................................................................4
3.2 Handling of Indoor Unit ...........................................................................................................................4
4. Indoor Unit Installation..................................................................................................................................5
4.1 Factory-Supplied Accessories..................................................................................................................5
4.2 Initial Check..............................................................................................................................................6
4.3 Installation................................................................................................................................................6
5. Refrigerant Piping Work ...............................................................................................................................12
5.1 Piping Materials......................................................................................................................................12
5.2 Piping Connection..................................................................................................................................12
6. Drain Piping ..................................................................................................................................................14
7. Electrical Wiring............................................................................................................................................15
7.1 General Check ........................................................................................................................................15
7.2 Electrical Wiring Connection .................................................................................................................15
7.3 Field Minimum Wire Sizes for Power Source.........................................................................................17
7.4 DIP Switch Setting..................................................................................................................................18
7.5 Setting of External Static Pressure ........................................................................................................20
8. Test Run ........................................................................................................................................................20
9. Safety and Control Device Setting...............................................................................................................20
10. System Description ....................................................................................................................................21
11. Wired remote controller.............................................................................................................................21
12. Before Operation ........................................................................................................................................22
13. Operation Method ......................................................................................................................................22
14. Automatic Control ......................................................................................................................................22
15. Filter Cleaning.............................................................................................................................................23
16. Troubleshooting.........................................................................................................................................23
16.1 If Trouble Still Remains ........................................................................................................................23
16.2 No Operation ........................................................................................................................................23
16.3 Not Cooling or Heating Well ................................................................................................................23
16.4 This is Not Abnormal............................................................................................................................23

-1-
1. Safety Summary
1. Safety Summary
DANGER
!
• Do not perform the installation work, refrigerant piping work, drain pump, drain piping and electrical
wiring connection without referring to our installation manual. If the instructions are not followed, it
may result in a water leakage, electric shock or a re.
• Do not pour water into the indoor unit or outdoor unit. This product contains electrical components
and if wet, can cause serious electrical shock.
• Do not open the service cover or access panel for the indoor or outdoor unit without turning OFF the
main power supply.
• Do not touch or adjust safety devices inside the indoor unit or outdoor unit. If these devices are
touched or readjusted, it may cause a serious accident.
• Refrigerant leakage can cause diiculty with breathing due to insuicient air. Turn OFF the main switch,
extinguish any naked ames and contact your service contractor, if refrigerant leakage occurs.
• The installer and system specialist shall ensure safety against refrigerant leakage according to local
regulations or standards.
• Use the ELB which is above medium reaction speed (residual-current circuit breaker, action time of 0.1s
or less). Otherwise, it may lead to electric shock or re.
• For installation, rmly connect the refrigerant pipe before the compressor starts operating.
For maintenance, relocation and disposal, remove the refrigerant pipe after the compressor stops.
• Do not perform a short-circuit of the protection device such as the pressure switch when operating. It
may cause a re and explosion.
WARNING
!
• Do not use any sprays such as an insecticide, lacquer, hair spray or other ammable gases within
approximately 1 meter from the system.
• If the circuit breaker or fuse is oen activated, stop the system and contact your service contractor.
• Check that the ground wire is securely connected. If the unit is not correctly grounded, it leads electric
shock. Do not connect the ground wiring to a gas piping, water piping, lighting conductor or ground
wiring for telephone.
• Connect a fuse of specied capacity.
• Before performing any brazing work, check to ensure that there is no ammable material around. When
using the refrigerant be sure to wear leather gloves to prevent cold injuries.
• Fix the cables securely. External forces on the terminals could lead to a re.
• Ensure that the wiring terminals are tightened securely with the specied torques. If not, generating re
or an electric shock at the terminal connection part may occur.
CAUTION
!
• Do not step or put any material on the product.
• Do not put any foreign material on the unit or inside the unit.
• Provide a strong and correct foundation so that:

-2-
1. Safety Summary
(a) The outdoor unit is not on an incline.
(b) Abnormal sound does not occur.
(c) The outdoor unit will not fall down due to a strong wind or earthquake.
NOTICE
• Make sure that the outdoor unit is not covered with snow or ice, before operation.
• In some cases, the packaged air conditioner may not be operated normally under the following cases.
* In case that electrical power for the packaged air conditioner is supplied from the same power
transformer as the device*.
* In case that the power source wires for the device* and the packaged air conditioner are located close
to each other.
Device*: (Ex) Lift, container crane, rectifier for electric railway, inverter power device, arc furnace,
electric furnace, large-sized induction motor and large-sized switch. It consumes a large quantity of
electrical power.
Regarding the cases mentioned above, surge voltage may be inducted in the power supply wiring
for the packaged air conditioner due to a rapid change in power consumption of the device and an
activation of switch.
Therefore, check the field regulations and standards before performing electrical work in order to
protect the power supply for the packaged air conditioner.
• If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly
qualied persons in order to avoid a hazard.
• Means for disconnection from the supply mains, which have a contact separation in all poles that
provide full disconnection under overvoltage category III conditions, must be incorporated in the xed
wiring in accordance with the AS/NZS 3000.
• The appliance shall be installed in accordance with relevant local and national wiring regulations.
NOTE:
• It is recommended that the room will be ventilated every 3 to 4 hours.

-3-
2. Structure
2. Structure
2.1 Name of Parts
< PPIH-3.0UFA1NQ - PPIH-6.5UFA1NQ >
350
497
12
3
45
6
7
8
11 12
13
9
10
Unit: mm
No. Part Name Model L1 L2 D1 D2
1Fan PPIH-3.0UFA1NQ 1,076 1,000 800 303
2Fan Motor PPIH-4.0UFA1NQ 1,076 1,000 800 303
3 Heat Exchanger PPIH-5.0UFA1NQ 1,300 1,240 890 393
4Distributor PPIH-6.0UFA1NQ 1,300 1,240 890 393
5Strainer PPIH-6.5UFA1NQ 1,300 1,240 890 393
6 Electrical Control Box
7 Refrigerant Gas Pipe Connection Flange Dimension (H x W, mm)
8 Refrigerant Liquid Pipe Connection Model Air-return Inlet Air-discharge Outlet
9 Drain Pipe Connection PPIH-3.0UFA1NQ
308 x 934 222 x 980
10 Float Switch PPIH-4.0UFA1NQ
11 Drain Pan PPIH-5.0UFA1NQ
308 x 1135 222 x 120412 Air-discharge Outlet PPIH-6.0UFA1NQ
13 Air-return Inlet PPIH-6.5UFA1NQ

-4-
3. Transportation and Handling
2.2 Necessary Tools and Instrument List for Installation
No. Tool No. Tool No. Tool
1 Handsaw 8 Plier 16 Cutter for Wires
2Phillips Screwdriver 9 Pipe Cutter 17 Gas Leak Detector
3 Vacuum Pump 10 Brazing Kit 18 Leveler
4Refrigerant Gas Hose 11 Hexagon Wrench 19 Clamper for Solderless Terminals
5Megohmmeter 12 Spanner 20 Hoist (for Indoor Unit)
6 Copper Pipe Bender 13 Weigher 21 Ammeter
7Manual Water Pump
(for Indoor Unit)
14 Charging Cylinder 22 Voltage Meter
15 Gauge Manifold 23 Wrench
NOTE:
• About vacuum pump, gas hose, charging cylinder, gauge manifold, please use suitable equipments
for R32 respectively. Do not mix other refrigerant.
3. Transportation and Handling
3.1 Transportation
Transport the product as close to the installation location as possible before unpacking.
WARNING
!
• The maximum number of pieces of equipment or the configuration of the equipment permitted to be
transported together will be determined by the applicable local transport regulations.
CAUTION
!
• Do not put any material on the product.
3.2 Handling of Indoor Unit
WARNING
!
• Do not put any foreign material into the indoor unit and check to ensure that none exists in the indoor
unit before the installation and test run. Otherwise, a fire or failure, etc. may occur.
CAUTION
!
• Be careful not to damage on insulation materials of unit’s surface when lifting.

-5-
4. Indoor Unit Installation
4. Indoor Unit Installation
DANGER
!
• Do not install the indoor unit in a ammable environment to avoid re or an explosion.
• Do not install the indoor unit in the laundry.
• The indoor unit should be positioned in a place where:
(1) both the air inlet and air outlet are unobstructed,
(2) the unit is not exposed to direct sunlight,
(3) drainage occurs easily,
(4) the unit is away from sources of heat or steam,
(5) there is no source of machine oil vapor (this may shorten the indoor unit service life),
(6) cool/warm air is circulated throughout the room,
(7) the unit is away from electronic ignition type fluorescent lamps (inverter or rapid start type) as they
may affect the remote controller range,
WARNING
!
• Check to ensure that the ceiling slab is strong enough. If not strong enough, the indoor unit may fall
down on you.
• Do not install the indoor unit outdoors. If installed outdoors, an electric hazard or electric leakage will
occur.
• Indoor units should be installed higher than 2.5 meters from the floor level.
4.1 Factory-Supplied Accessories
Check to ensure that the following accessories are packed with the indoor unit.
NOTE:
• If any of these accessories are not packed with the unit, please contact your contractor.
Table 4.1 Factory-Supplied Accessories
Accessory Q'ty Purpose
Screw 16 For Fixing Flanges
Hose Clamp 1 For Drain Hose Connection
Insulation
(22 ID x 130) 1 For Refrigerant Liquid Piping
Insulation
(40 ID x 130)
1 For Refrigerant Gas Piping
Cord Clamp 5
For Fixing Thermal Insulation for
Refrigerant Pipings
Cord Clamp 6
Magnet Ring 1
For anti-electromagnetic interference of
transmission wires between outdoor and
indoor units

-6-
4. Indoor Unit Installation
4.2 Initial Check
• Install the indoor unit with a proper clearance around it for operation and maintenance working
space, as shown in Fig.4.1.
Unit: mm
* In case that the ceiling board can not
be detected for servicing, prepare a
service access door below the indoor
unit for removing the indoor unit.
Min. 1000 Min. 1000
Min. 600
30 30
3.0HP-4.0HP 800
5.0HP-6.5HP 890
497
3.0HP-4.0HP 1076
5.0HP-6.5HP 1300
3.0HP-4.0HP 1000
5.0HP-6.5HP 1240
Min. 600
Electrical Control Box
Service Access Door
(Min. 450x450)
Fig.4.1 Operation and Installation Space
• Consider the air distribution from the indoor unit to the space of the room, and select a suitable
location so that uniform air temperature in the room can be obtained.
• Do not install flammable parts in the service space for the indoor unit.
• Avoid obstacles which may hamper the air intake or the air discharge flow.
• Do not install the indoor unit in a machine shop or kitchen where vapor from oil or its mist flows to
the indoor unit.
The oil will deposit on the heat exchanger, thereby reducing the indoor unit performance, and may
deform and in the worst case, break the plastic parts of the indoor unit.
• Pay attention to the following points when the indoor unit is installed in a hospital or other
facilities
where there are electronic waves from medical equipment.
(a) Do not install the indoor unit where the electromagnetic wave is directly radiated to the electrical
box, remote control cable or remote control switch.
(b) Install the indoor unit and components as far as practical or at least 3 meters from the
electromagnetic wave radiator.
(c) Prepare a steel box and install the remote control switch in it. Prepare a steel conduit tube and
wire the remote control cable in it. Then, connect the ground wire with the box and the tube.
(d) Install a noise filter when the power supply emits harmful noises.
• To avoid any corrosive action to the heat exchangers, do not install the indoor unit in an acid or
alkaline environment.
4.3 Installation
4.3.1 Mounting on Truss
In the case that the indoor unit is installed in the false ceiling space without hanging, pay attention
to the following items.

-7-
4. Indoor Unit Installation
(1) Apply vibration absorbing mats (10t) under the indoor unit.
< PPIH-3.0UFA1NQ - PPIH-6.5UFA1NQ >
Vibration Absorbing
Mat (10t)
Wooden Bar Tr uss
Indoor Unit
P
Place the three wooden bars on the truss as shown in the figure.
Note that the middle wooden bar should be placed in the center position of the unit.
Tr uss
View from P
Wooden Bar
Vibration Absorbing
Mat (10t)
(2) Apply an auxiliary drain under the indoor unit if the ambient humidity is higher than 80% (RH).
4.3.2 Separating Indoor Unit (If required)
NOTE:
• Separate the indoor unit only when necessary. Disassemble and reassemble on a flat surface.
< PPIH-3.0UFA1NQ - PPIH-4.0UFA1NQ >
Separate the indoor unit in the following order.
(1) Remove the E-BOX cover (2 screws) (Fig.4.2).
Supply Air
Heat Exchanger Compartment
Fan Cover
Return Air
Electrical Box
Electrical Box cover
Fig.4.2
(2) Unplug the float switch, temperature sensor. After removing the insulation tape(store for reuse),
unplug fan motor connectors as below, and unfasten fan motor wiring (Fig.4.3).
Main PCBA
Fan Motor Wiring
and Receiver
Unplug this connector
(float switch and temp.sensors)
Unfastern fan motor wiring
Unplug fan motor connector from rear of E-box
Fig.4.3