Hitachi Set Free mini-HNRQ1 Series User manual

Service Manual
< Outdoor Units >
Power Supply Model
220-240V/1Ph/50Hz
RAS-3.0HNBRKQ1
RAS-3.5HNBRKQ1
RAS-4.0HNBRKQ1
RAS-4.5HNBRKQ1
RAS-5.0HNBRKQ1
RAS-6.0HNBRKQ1
RAS-6.5HNBRKQ1
380-415V/3Ph/50Hz
RAS-7.0HNBRMQ1
RAS-8.0HNBRMQ1
RAS-10HNBRMQ1
RAS-11HNBRMQ1
RAS-12HNBRMQ1
HS2019266A
SERVICE MANUAL
HEAT PUMP AIR CONDITIONERS
- SET FREE mini-HNRQ1 SERIES VRF CONDITIONERS SYSTEM -

i
Contents
Installation .........................................................................................................................................................1
1. Before Installation .........................................................................................................................................2
1.1 Necessary Tools and Instrument List for the Installation ......................................................................... 2
1.2 Structure..................................................................................................................................................4
1.3 Refrigerant Cycle Diagram ......................................................................................................................7
1.4 Model of Outdoor Unit .............................................................................................................................8
1.5 Transportation .........................................................................................................................................9
1.6 Factory Supplied Accessories ...............................................................................................................10
2. Outdoor Unit Installation.............................................................................................................................. 11
2.1 Installation Location and Precautions.................................................................................................... 11
2.2 Service Space .......................................................................................................................................13
2.3 Installation Work....................................................................................................................................16
3. Refrigerant Piping Work .............................................................................................................................. 18
3.1 Precaution for Refrigerant Piping ..........................................................................................................18
3.2 Model of Branch Pipe ............................................................................................................................21
3.3 Refrigerant Piping Size..........................................................................................................................22
3.4 Refrigerant Piping Work for Outdoor Unit..............................................................................................24
3.5 Air Tight Test..........................................................................................................................................26
3.6 Vacuuming............................................................................................................................................. 27
3.7 Additional Refrigerant Charge Calculation ............................................................................................28
3.8 Additional Refrigerant Charge Work......................................................................................................29
3.9 Pressure Measurement .........................................................................................................................30
4. Electrical Wiring...........................................................................................................................................30
4.1 General Check ......................................................................................................................................31
4.2 Electrical Wiring Connection ................................................................................................................. 32
4.3 Electrical Wiring for Outdoor Unit ..........................................................................................................34
5. DIP Switch Setting of Outdoor Unit ............................................................................................................. 36
6. Test Run ......................................................................................................................................................38
6.1 Before Test Run.....................................................................................................................................38
6.2 Test Run by DIP Switch of Outdoor Unit................................................................................................38
6.3 Test Run by Wired Controller.................................................................................................................39
7. Safety and Control Device Setting...............................................................................................................40
8. Drain Adapter: DC-01Q (Optional Parts) ....................................................................................................41
Troubleshooting...............................................................................................................................................43
1. Initial Troubleshooting..................................................................................................................................44
1.1 Checking Electrical Wiring and Power Source ......................................................................................44
1.2 Location of Printed Circuit Boards.........................................................................................................46
1.3 Checking Rotary Switch and DIP Switch Settings.................................................................................54
1.4 Checking Wired Controller .................................................................................................................... 57
1.5 Checking Using 7-Segment Display......................................................................................................61
1.6 Checking of Protection Control Information...........................................................................................72
2. Troubleshooting Procedures........................................................................................................................73
2.1 Alarm Code Indication of Wired Controller ............................................................................................73
2.2 Troubleshooting Using Alarm Codes ..................................................................................................... 74
3. Procedures for Checking...........................................................................................................................105
3.1 Checking Method for Outdoor Unit PCB of 3~6.5HP .......................................................................... 105
3.2 Checking Method for PCBA of 7~12HP...............................................................................................109
3.3 Checking Method of Electronic Expansion Valve ................................................................................ 115
Maintenance..................................................................................................................................................121

ii
1. Outdoor Unit ..............................................................................................................................................122
1.1 Removing Service Cover.....................................................................................................................122
1.2 Removing Air Outlet Grille ...................................................................................................................123
1.3 Removing Upper Cover.......................................................................................................................124
1.4 Removing Lower Service Cover and Rear Cover ...............................................................................125
1.5 Removing Outdoor Fan Motor.............................................................................................................126
1.6 Removing Electrical Box .....................................................................................................................128
1.7 Removing Compressor........................................................................................................................132
1.8 Removing High Pressure Switch and Pressure Sensor ...................................................................... 134
1.9 Removing 4-Way Valve Coil ................................................................................................................135
1.10 Removing Electronic Expansion Valve Coil....................................................................................... 136
1.11 Removing Solenoid Valve Coil (SVA) ................................................................................................137
1.12 Removing 4-Way Valve .....................................................................................................................138
1.13 Removing Electronic Expansion Valve and Solenoid Valve .............................................................. 139
2. Main Parts ................................................................................................................................................. 140
2.1 Inverter ...............................................................................................................................................140
2.2 Rotary Compressor .............................................................................................................................144
2.3 Scroll Compressor...............................................................................................................................145
2.4 Thermistor ...........................................................................................................................................146
2.5 Electronic Expansion Valve for Outdoor Units..................................................................................... 147
2.6 Pressure Sensor..................................................................................................................................148
2.7 High Pressure Switch ..........................................................................................................................149
2.8 Noise Filter (NF1) ................................................................................................................................149
2.9 Reader (DCL) ......................................................................................................................................150
External Input/Output and Function Setting...................................................................................................151
1. External Input/Output Setting Method ....................................................................................................... 152
2. Exteral Input and Output Settings..............................................................................................................154
2.1 Denition of External Input and Output Settings ................................................................................. 154
2.2 External Input Function Setting ..........................................................................................................155
2.3 External Output Function Setting ........................................................................................................159
3. Function Setting.........................................................................................................................................161
4. Service and Maintenance Record by 7-Segment Display ......................................................................... 164
Field Work Instructions..................................................................................................................................165
1. Caution for Refrigerant Leakage ............................................................................................................... 166
2. Modications of Charging Refrigerants .................................................................................................... 166
3. Maintenance Work.....................................................................................................................................166
4. Service and Maintenance Record ............................................................................................................. 168
5. Saturation Curve for Refrigerant................................................................................................................169
Service Parts List...........................................................................................................................................170

I
Temperature DB: Dry Bulb, WB: Wet Bulb
Maximum Minimum
Cooling
Operation
Indoor 32°C DB/23°C WB 21°C DB/15°C WB
Outdoor Stable 48°C DB Interval 48~52°C DB -5°C DB *
Heating
Operation
Indoor 27°C DB 15°C DB
Outdoor 24°C DB/15°C WB Stable -15°C WB Interval -20~-15°C WB
Note:
*: When RAS-7.0~12HNBRMQ1 outdoor units are connected with the RCIM-0.8FSN4 or RCD-0.8~1.0FSN3 or RCS-0.8~1.0FSN, if only
one of these indoor unit is operating in cooling mode, the minimum outdoor temperature is limited to 5°C DB.
IMPORTANT NOTICE
●The company pursues a policy of continuous improvement in design and performance of products. The
right is therefore reserved to vary specications without notice.
●The company cannot anticipate every possible circumstance that might involve a potential hazard.
●This heat pump air conditioner is designed for standard 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 process.
● Do not install the unit in the following places. It may cause a re, deformation, corrosion or failure:
* Places where oil (including machinery oil).
* Places where a lot of sulde gas drifts such as in hot spring.
* Places where inammable gas may generate or ow.
* Places where strong salty wind blows or with an atmosphere of acidity or alkalinity such as coastal
regions.
● Do not install the unit in the place where silicon gas drifts. If the silicon gas attaches to the surface of
heat exchanger, the n surface repels water. As a result, drain water splashes outside the drain pan and
splashed water runs into 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
electromagnetic wave generates from medical equipment.
* Do not install the unit in the place where the electromagnetic wave is directly radiated to the electrical
box, wired controller cable or switch.
* Install the unit at least 3 meters away from electromagnetic wave such as a radio.
● Do not install the unit in the place where the breeze directly blows to the animals and plants. It could
adversely a󰀨ect the animals and plants.
● The installation and service engineering should be in accordance with the local laws and regulations.
● If you have any questions, contact your distributor or dealer.
● The installation of this air conditioner can only be carried out by dealers or specialists. If the user installs
the air conditioner by himself, it may cause leakage, electric shock or re.
●This manual gives a common description and information for this heat pump air conditioner and also for
other models.
● To protect the environment, do not discard the product at will, the company can provide recycling services
as per the relevant provisions of the country, and provide replaceable components as per national
standards.
● 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 English speaking
people. If this is not the case, the customer should be added safety, caution and operating signs in the
native language.
● This heat pump air conditioner has been designed for the following temperatures. Operate the heat pump
air conditioner within this range.

II
<Signal Words>
● Signal words 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.
NOTICE :NOTICE, used with the safety alert symbol, indicates a hazardous situation which, if
not avoided, could result in minor or moderate injury.
NOTE : NOTE is useful information for operation and/or maintenance.
DANGER
!
● Do not perform installation work, refrigerant piping work, drain pump, drain piping and electrical
wiring connection without referring to our installation manual. If performed without following the
instructions, it may result in a system leakage, electric shock or a re.
● Do not pour water into the indoor or outdoor unit. These products are equipped with electrical parts.
If poured, it will cause a serious electrical shock.
● Do not open the service cover and the PCB for the indoor and outdoor unit without turning OFF the
main power supply, this may lead to serious safety accidents.
● Do not touch or adjust safety devices inside the indoor or outdoor units. If these devices are touched
or readjusted, serious accidents may occur.
● Refrigerant leakage can cause di󰀩culty with breathing due to insu󰀩cient air. If a refrigerant leakage
is found, immediately turn OFF the main power supply, extinguish any open ame, and then contact
the service dealer.
● Make sure to perform air-tight testing.
●The refrigerant R410A used in this product (uorocarbon) is not ammable, non-toxic, and odourless.
If there is refrigerant leakage, exposure to open ame produces toxic gases. Also, the refrigerant
gas is heavier than air, if the area is lled with refrigerant gas, it may cause su󰀨ocation to the people
in the vicinity.When conducting leak detection and air-tight testing, lling with oxygen, acetylene or
ammable and toxic gas may cause explosion. Nitrogen is recommended for this test.
● The refrigerant safety leakage standard for construction and operation systems are determined as
per local regulations or standards.
● Use a medium induction speed above ELB (Earth Leakage Breaker with action time of 0.1 seconds
or less). Otherwise, this may cause electric shock or re.
● Do not install the product in places where there is high density of oil mist, ammable gas, salt spray,
or toxic gases (such as sulphide), and so on.
● During installation, connect the refrigerant pipe rmly before the compressor starts running. For
maintenance, stop the compressor before moving, handling and removing the refrigerant pipe.
● Do not short-circuit the protective devices (such as pressure switches and so on) during operation.
Otherwise it may cause a re or explosion.

III
WARNING
!
● Please do not use sprays such as pesticide, oil paint, hair spray or other ammable gases within 1
meter of the unit.
● If the circuit breaker acts or fuse acts frequently, please stop the system operation immediately and
contact your local dealer or customer service.
● Ensure that the grounding wire is securely connected. If not, it may cause an electrical failure. Do
not connect the grounding wire to the gas pipe, tap water pipe, lightning rod or telephone grounding
wire.
● Use fuse of specied capacity.
● While you perform brazing, ensure that there are no combustible around it. Please wear leather
gloves while using refrigerant to prevent freezing.
● Prevent mice and other small animals damaging the wiring and the electrical components. If
unprotected parts are bitten, it may lead to re.
● Securely connect and x the wiring, do not apply external force on terminal blocks, this may cause
the terminal to loosen and can cause a re.
●Ensure that the foundation is robust enough to install the unit. If not, the appliance can fall and break.
●Do not install the unit in the presence of large amounts of oil, steam, organic solvents and corrosive
gases (ammonia, sulphide and acid, so on). Because corrosion may cause refrigerant leakage,
electrical failure, performance degradation and unit damage.
● Please follow the installation manual and all the relevant provisions, standards for electrical
construction. Otherwise, electric failure of re may occur due to insu󰀩cient capacity or mismatch of
specications.
● Use specied wiring between the units and select the correct wiring between the appliances.
Otherwise,it will cause an electrical malfunction or re.
● Make sure that the terminals are tightened with the specied torque. Otherwise it will cause a re or
electrical fault at the terminal block.
● 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.
● If there is re, please cut-o󰀨 the power supply immediately.
● This appliance can be used by children aged from 8 years and above and persons with reduced
physical, sensory or mental capabilities or lack of experience and knowledge if they have been given
supervision or instruction concerning use of the appliance in a safe way and understand the hazards
involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be
made by children without supervision.
● 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 wiring rules.
● The appliance shall be installed in accordance with national wiring regulations.
● The maximum working pressure is 4.15MPa. This maximum working pressure shall be considered
when connecting the outdoor unit to indoor units.
● The refrigerant used in the outdoor unit is R410A. Please refer to “Additional Refrigerant Charge” of
this manual for the refrigerant charging.
● The outdoor unit shall only be connected to indoor units suitable for the same refrigerant (R410A).
● The unit is a partial unit air conditioner, complying with partial unit requirements of the International
Standard, and must only be connected to other units that have been conrmed as complying with
corresponding partial unit requirements of the International Standard.

IV
NOTICE
●Do not tread on the product or place sundries on the product.
●Do not place or put any material on the product or inside the product.
● Provide a strong and correct foundation so that:
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.
NOTE:
● Please do not install indoor unit, outdoor unit, wired controller and wiring within 3m of strong
electromagnetic radiation appliance (For example: medical device).
● After a long time shut down, if you want to restart the appliance, please power the crankcase heating
band to work 12 hours prior to operation.
● Before switching on the outdoor unit, make sure that it is not covered by snow and ice.
● The heat pump air conditioner may not work properly if:
* The power of the transformer which supplies power is equal or less than the electric power of the
air conditioner.
* Power supply for high-power equipment is too close to the power wire of the air conditioner.
Device*: (Ex) Lift, container crane, rectier 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.
In the case mentioned above, the power wire of the air conditioner generates a large induced surge
voltage due to the abrupt change in the power consumption of the power equipment and the switch
action.
● Therefore, to protect the power supply to the system, before performing electric construction, please
carefully check the eld installation specications and standards.
● It is recommended to ventilate the room every 3 to 4 hours.
●Reduction in heat pump air conditioner heating capacity is observed due to the degradation of
outdoor environmental temperature. Therefore, in some low temperature areas, it is recommended
to use auxiliary heating device while installing heat pump air conditioner.
● Only a professional maintenance personnel can perform maintenance work for this air conditioner.

1
Installation

2
INSTALLATION
1. Before Installation
1.1 Necessary Tools and Instrument List for the Installation
No. Tool No. Tool
1 Handsaw 12 Wrench
2 Phillips Screwdriver, Slotted Screwdriver 13 Scale
3 Vacuum pump 14 Charging Cylinder
4 Refrigerant Gas Hose 15 Gauge Manifold
5 Megohmmeter 16 Wire Cutters
6 Copper Pipe Bender 17 Gas Leak Detector
7 Manual Water Pump (for Indoor Unit) 18 Leveller
8 Pliers 19 Crimper for solderless Terminals
9 Pipe Cutter 20 Hoist (for Indoor Unit)
10 Brazing Kit 21 Ammeter
11 Hexagon Wrench 22 Voltage Meter
It is recommended to use specially designated tools for handling R410A refrigerant.

3
INSTALLATION
■: Interchangeability is available with current R22 ●: Only for Refrigerant R410A (No Interchangeability with R22)
◎: Prohibited ★: Only for Refrigerant R407C (No Interchangeability with R22)
Measuring Instrument and Tool
Interchangeability with
R22 Reason of Non-Interchangeability and Attention
(○: Strictly Required) Use
R410A R407C
Refrigerant
Pipe
Pipe Cutter,
Chamfering
Reamer
■ ■ ─ Cutting Pipe
Removing Burrs
Flaring Tool ■ ■ * The aring tools for R407C are applicable to R22.
* If using aring tube, make dimension of tube larger
for R410A.
* In case of hard temper pipe, aring is not available.
Flaring for Tubes
Extrusion
Adjustment
Gauge
● ─
Dimensional Control
for Extruded Portion
of Tube after Flaring
Pipe
Bender ■ ■ *In case of hard temper pipe, bending is not available.
Use elbow for bend and braze. Bending
Expanding Tool ■ ■ *In case of hard temper pipe, expanding of tube is
not available..Use socket for connecting tube. Expanding Tubes
Torque Wrench
● ■ *For 12.7mm D., 15.88mm D., wrench size is up 2mm. Connection of
Flare Nut
■ ■ *For 6.35mm D., 9.52mm D., 19.05mm D., wrench
size is the same.
Brazing Tool ■ ■ * Perform correct brazing work. Brazing for Tubes
Nitrogen Gas ■ ■ *Strict control against pollution (Blow nitrogen
during brazing.)
Prevention from
Oxidation during
Brazing
Lubrication
Oil (for Flare
Surface
●★
*Use a synthetic oil which is equivalent to the the oil
used in the refrigeration cycle.
*Synthetic oil absorbs moisture quickly.
Applying Oil to the
Flared Surface
Vacuum
Drying;
Refrigerant
Charge
Refrigerant
Cylinder ●★
*Check refrigerant cylinder color.
○:
Liquid refrigerant charging is required regarding
zeotropic refrigerant.
Refrigerant
Charging
Vacuum Pump ■ ■ ○:
It is required to mount a vacuum pump adapter
(check valve) to prevent oil of the vacuum pump
from being pulled when the vacuum pump stops.
Vacuum
Pumping
Adapter for
Vacuum Pump
(Check Valve)
※●★
Manifold
Valve ●★
○:
Use manifold and charging hoses designed for
each refrigerant as design pessure is different.Do
not share manifold and charging hoses with other
refrigerant type to prevent mixing of different types
of refrigerant oil. (If use, it may cause cycle choking
or compressor failure.)
Standard of Connection Screw: R410A: UNF1/2,
R407C: UNF7/16.
Vacuum Pumping,
Vacuum Holding,
Refrigerant
Charging and Check
of Pressures
Charging Hose ●★
Charging
Cylinder ◎ ◎ *Use the weight scale. ─
Weight ■ ■ ─
Measuring
Instrument for
Refrigerant
Charging
Refrigerant Gas
Leakage
Detector
*●★*Use a detector designed for each refrigerant as
detecting method is different. Gas Leakage Check
※: Interchangeability with R407C.

4
INSTALLATION
1.2 Structure
Model: RAS-3.0~3.5HNBRKQ1
No. Part Name No. Part Name No. Part Name No. Part name
1 Chassis 7 Filter 13 Solenoid Valve 19 Accumulator
2Vibration Absorder 8 High Pressure Sensor 14 Low Pressure Sensor 20 Air Outlet
3 Crankcase Heater 9 High Pressure Switch 15 4-Way Valve 21 Propeller Fan
4 Compressor 10 Oil Separator 16 Check Joint 22 Fan Motor
5 Liquid Stop Valve 11 Electronic Expansion
Valve 17 Check Valve 23 Air Inlet
6 Gas Stop Valve 12 Electrical Box 18 Filter 24 Heat Exchanger

5
INSTALLATION
Model: RAS-4.0~6.5HNBRKQ1
No. Part Name No. Part Name No. Part Name No. Part name
1 Chassis 7 Filter 13 Electrical Box 19 Air Outlet
2Vibration Absorder 8 High Pressure Sensor 14 Check Joint 20 Propeller Fan
3 Crankcase Heater 9 High Pressure Switch 15 Low Pressure Sensor 21 Fan Motor
4 Compressor 10 Filter 16 4-Way Valve 22 Air Inlet
5 Liquid Stop Valve 11 Check Valve 17 Accumulator 23 Heat Exchanger
6 Gas Stop Valve 12 Solenoid Valve 18 Electronic Expansion
Valve 24 Oil Separator

6
INSTALLATION
Model: RAS-7.0~12HNBRMQ1
No. Part Name No. Part Name No. Part Name No. Part name
1 Chassis 7 Filter 13 Solenoid Valve 19 Accumulator
2Vibration
Absorder 8 High Pressure Sensor 14 Low Pressure Sensor 20 Air Outlet
3 Crankcase Heater 9 High Pressure Switch 15 4-Way Valve 21 Propeller Fan
4 Compressor 10 Oil Separator 16 Check Joint 22 Fan Motor
5 Liquid Stop Valve 11 Electronic Expansion
Valve 17 Check Valve 23 Air Inlet
6 Gas Stop Valve 12 Electrical Box 18 Filter 24 Heat Exchanger

7
INSTALLATION
1.3 Refrigerant Cycle Diagram
Model:RAS-3.0~6.5HNBRKQ1 Model:RAS-7.0~12HNBRMQ1
No. Part Name No. Part Name No. Part Name
1 Compressor 10 Fan Motor 19 Oil Capillary Tube
2 Oil Separator 11 Distributor 20 Filter 4
3 High Pressure Switch 12 Filter 1 21 Solenoid Valve
4 High Pressure Sensor 13 Electronic Expansion Valve 22 Low Pressure Sensor
5 Check Valve 14 Filter 2 23 Crankcase Heater
6 4-Way Valve 15 Liquid Stop Valve 24 Filter 5
7 Check Joint 16 Gas Stop Valve 25 Bypass Capillary Tube
8 Gas Collector 17 Filter 3 26 Heat Exchanger
9 Propeller Fan 18 Accumulator 27 Y-shaped Joint

8
INSTALLATION
1.4 Model of Outdoor Unit
The number of indoor units that can be connected to an outdoor unit is dened in the following table :
Table 1.1 System Combination
Outdoor Unit Type
Min. Total Capacity of
the indoor units can be
connected
(kW)
Max. Total Capacity of
the indoor units can be
connected
(kW)
Numbers of the indoor
units can be connected
(Q’ty)
Min. Capacity at
Individual Operation
(kW)
RAS-3.0HNBRKQ1 4.0 10.40 2~4 2.2
RAS-3.5HNBRKQ1 5.0 13.00 2~5 2.2
RAS-4.0HNBRKQ1 5.6 14.56 2~6 2.2
RAS-4.5HNBRKQ1 6.0 15.60 2~6 2.2
RAS-5.0HNBRKQ1 7.0 18.20 2~7 2.2
RAS-6.0HNBRKQ1 8.0 20.80 2~8 2.2
RAS-6.5HNBRKQ1 9.0 23.40 2~9 2.2
RAS-7.0HNBRMQ1 10.0 26.00 2~10 2.2
RAS-8.0HNBRMQ1 11.2 29.10 2~10 2.2
RAS-10HNBRMQ1 14.1 36.50 2~10(13) △2.2
RAS-11HNBRMQ1 15.5 40.30 2~10(14) △2.2
RAS-12HNBRMQ1 16.8 43.60 2~10(15) △2.2
Notes:
(1) The connectable indoor unit capacity ratio can be calculated as follows:
Connectable Indoor Unit Capacity Ratio = Total Indoor Unit Capacity / Total Outdoor Unit Capacity.
(2) It is suggested that the total capacity of indoor units which are operated simultaneously should not exceed the capacity of outdoor
units under the following conditions. Otherwise, there is a decrease in operating performance.
●When there are some 4-way cassette indoor units and high wall indoor units in the system;
●When the outdoor air temperature is 43°C or more during the outdoor unit cooling operation;
●When the outdoor air temperature is lower than -10°C during the outdoor unit heating operation.
(3) When operating the outdoor unit under low heating load conditions and the outdoor temperature is 15°C WB or more, only one indoor
unit is in the operation, the outdoor unit will be Thermo-OFF* to protect the compressor from failure.
(4) *: When RAS-7.0~12HNBRMQ1 outdoor units are connected with the RCIM-0.8FSN4 or RCD-0.8~1.0FSN3 or RCS-0.8~1.0FSN,
if only one of these indoor unit is operating in cooling mode, the minimum outdoor temperature is limited to 5°C DB.
(5) For the same system, if the connectable indoor unit capacity ratio is over than 100%, and which all the indoor units operate
simultaneously, capacity of every indoor unit should be less than its rated capacity.
(6) △: When the number of indoor units which are connected to the model of RAS-10~12HNBRMQ1 outdoor unit is over than 10 units,
the following restrictions are also required to meet.
(a) The piping system must be divided into two main pipes, the total capacity and the number of the units connected to each main
pipe should be as equal as possible.
(b) The maximum height difference between outdoor and indoor units is 30 meters and the maximum height difference between indoor
units is 10 meters, the longest piping length between the branch pipe to the connected indoor unit is 10 meters.
(c) The connectable indoor unit capacity ratio should not be more than 105%.
(d) Only 0.8~4.0HP of ducted indoor units can be selected.
No.1
No.10
No.2 No.3 No.4 No.5 No.6 No.7
No.8 No.9 No.11No.12No.13 No.14
No.15
*Thermo-ON: The outdoor unit and some indoor units are running;
Thermo-OFF: The outdoor unit and some indoor units are standby, but don’t run.

9
INSTALLATION
1.5 Transportation
Transport the product as near to the installation location before unwrapping the package.
●Do not put any material or stand on the product.
●Apply two lifting wires onto the outdoor unit, when lifting it by crane.
(1) The Method of Hanging
When hanging the unit, ensure a balance of the unit, ensure the safety and lift up smoothly.
(a) Do not unwrap the package until the hanging work is nished.
(b) The hanging work can be followed the next gure:
More than 60°
Wire Rope
0.7m~1.0m
Apply rope
through the
square hole
Do not remove
corrugated paper
frame and plastic
band
Notes:
●Make sure the unit is in horizontal while lifting.
●Do not hook with the plastic bands.
●If the unit is lifted after unwrapping the package, protect the unit with the corner paddings or
cloth.
Attach corner padding or cloth here
CAUTION
!

10
INSTALLATION
(2) The weight of outdoor unit.
Model Net Weight (kg) Gross Weight (kg)
RAS-3.0HNBRKQ1
RAS-3.5HNBRKQ1 75 85
RAS-4.0HNBRKQ1
RAS-4.5HNBRKQ1
RAS-5.0HNBRKQ1
114 124
RAS-6.0HNBRKQ1
RAS-6.5HNBRKQ1 118 128
RAS-7.0HNBRMQ1
RAS-8.0HNBRMQ1 154 168
RAS-10HNBRMQ1
RAS-11HNBRMQ1
RAS-12HNBRMQ1
172 187
Do not place or leave any other objects (cables, tools) inside the outdoor unit or control board and verify
that nothing remains there prior to installation and test run. Ignoring the instructions can lead to damage and
re incidents.
1.6 Factory Supplied Accessories
The accessories are packed in the outdoor unit, please check that in the package.
Accessory Appearance Quantity Remarks
Plastic Bag 1
RAS models
IOM 1
Wire Clamp (big) 1
Only for RAS-3.0~6.5HNBRKQ1
Wire Clamp (small) 3
Magnetic Ring (big) 2
Magnetic Ring
(small) 1
Washer 4
Wire Clamp (big) 2
Only for RAS-7.0~12HNBRMQ1
Pipe Adapter 1 1
Pipe Adapter 2 1
Note:
If any of these accessories are not packed in the unit, please contact your distributor.
WARNING
!

11
INSTALLATION
2. Outdoor Unit Installation
2.1 Installation Location and Precautions
●When installing the unit into:
●A wall: Make sure the wall is strong enough to hold the weight of the unit. It may be necessary to
construct a strong wood or metal frame to provide added support.
●A room: Properly insulate any refrigerant tubing run inside a room to prevent “sweating” that can
cause dripping and water damage to wall and oors.
●Damp or uneven areas: Use a raised concrete pad or concrete blocks to provide a solid and level
foundation for the unit to prevent water damage and abnormal vibration.
●An area with high winds: Securely anchor the outdoor unit down with bolts and a metal frame.
Provide a suitable wall for wind prevention (eld-supplied).
●A snowy area: Install the outdoor unit on a raised platform that is higher than drifting snow.
Provide snow roof for snow prevention (eld-supplied).
●Do not install the unit in the following places. Otherwise, it can result in an explosion, re, deformation,
corrosion, or product failure.
● Explosive or ammable atmosphere.
● Where a re, oil, steam, or powder can directly enter the unit, such as in close proximity or
directly above a kitchen stove.
●Where oil (including machinery oil) may be present.
●Where corrosive gases such as chlorine, bromine, or sulphide can accumulate, such as near a
hot tub or hot spring.
● Where dense, salt-laden airow is heavy, such as in coastal regions.
●Where the air quality is of high acidity.
●Where harmful gases can be generated from decomposition.
●Do not install the indoor unit where such dripping can cause moisture damage or uneven locations: Use a
raised concrete pad or concrete blocks to provide a solid and level foundation for the unit to prevent
water damage and abnormal vibration. Do not position the drain pipe for the indoor unit near any
sanitary sewers where corrosive gases may be present.
●Before performing any brazing work, be sure that there are no ammable materials or open ames nearby.
●Perform a test run to ensure normal operation. Safety guards, shields, barriers, covers, and protective
devices must be in place while the compressor/unit is operating. During the test run, keep ngers and
clothing away from any moving parts.
●Clean up the site when nished, remember to check that no metal scraps or bits of wiring have been left
behind inside the unit being installed.
●After installation work for the system has been completed, explain the “Safety Precautions”, the proper
use and maintenance of the unit to the customer according to the information in all manuals that came
with the system. All manuals and warranty information must be given to the user or be left near the
Indoor Unit.

12
INSTALLATION
●Select a direction where a strong wind does not blow to the air outlet surface or the air inlet surface.
●If a suitable location cannot be found, the windbreak wall or fence should be installation to prevent a strong
wind blows to air inlet or outlet of the outdoor unit. Make sure to provide sufcient space around
the outdoor unit for operation and maintenance.
Notes:
●If strong wind blows to the air outlet directly, the needed airow volume cannot be maintained and the outdoor unit may be
difcult to operate normally.
●If excessively strong wind blows to the air outlet consecutively, it may cause the propeller fan or the fan motor breakage by high
speed rotation or overload.

13
INSTALLATION
2.2 Service Space
When the outdoor unit is installed, the allowed service space is as follows:
●If there is not enough service space for air inlets and outlets, it may result in a performance
drop-off and mechanical issues due to insufcient air intake.
●Additionally, adequate srvice space is required for service maintenance access.
(1) Obstacles on the inlet side
(a) There is no obstacle in the upper side. Unit: mm
Single Installation Multiple Installation
(b) There are obstacles upper side Unit: mm
Single Installation Multiple Installation