HITACHI RAK-DH24PCBST, RAC-DH24PCBST Split Unit Air Conditioner
Specifications
- Indoor Unit Model: RAK-DH24PCBST
- Outdoor Unit Model: RAC-DH24PCBST
- Refrigerant: R32
- Electrical Standards: Thailand Engineering Institute under The Royal Patronage of His Majesty
Installation Guidelines
Before installation, carefully read the installation manual to ensure proper installation procedures. Inform customers about correct operation of installation.
Warning
- Use a torque wrench for flare nut tightening to prevent gas leakage.
- Avoid sharp bending of pipes to prevent gas leakage and potential ignition.
- Ensure installation is done by a qualified technician to prevent water leakage, short circuit, or fire hazards.
Electrical Installation
Follow Thailand’s Engineering Institute standards for electrical connections.Use specified wire for connecting indoor and outdoor units, ensuring tight connections to prevent overheating and fire hazards.
Refrigerant Handling
Only use specified refrigerant (R32) during installation or removal to avoid abnormal pressure levels and potential ruptures. Ventilate fully in case of refrigerant gas leaks to prevent poisonous gas formation upon contact with fire.
Maintenance and Repairs
Avoid unauthorized modifications to the air conditioner to prevent dangerous situations. Call a qualified technician for repairs to avoid water leakage, electric shock, or fire hazards.
Frequently Asked Questions
Q: Can I install the air conditioner myself?
A: It is recommended to have a qualified technician install the unit to prevent potential hazards like water leakage, short circuit, or fire. Unauthorized installation may void warranty and cause safety issues.
Q: What refrigerant should I use during installation?
A: Use only the specified refrigerant R32 to ensure proper functioning of the air conditioner and avoid pressure-related issues.
Q: How do I prevent gas leaks during installation?
A: Make sure to tighten all connections properly, use the specified components, and ventilate the area in case of a gas leak to prevent any dangerous situations.
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INSTRUCTION MANUAL
FOR SERVICE PERSONNEL ONLY
Carefully read through the procedures of proper installation before starting installation work.
The sales agent should inform customers regarding the correct operation of installation.
Tools Needed
Tools Needed For Installation Work + Screwdriver Measuring Tape Knife Saw Pipe Cutter Hexagonal Wrench Key ( 4mm) Power Drill (ø 65mm ~ ø 80mm) Vacuum Pump Pliers or Wrench Torque Wrench Vacuum Pump Adaptor Flare Tool Gas Leakage Detector Manifold Valve Charge Hose Reammer File
! WARNING
Flare nut must use a torque wrench without fail. Tighten with the specified tightening torque. If the flare nut is tightened too much, after a long period of time, the flare nut breaks, Gas leakage, stagnation, touching fire, rarely cause ignition.
Sharp bending of the pipe use the polyethylene rod, bend not crushed the pipe. Gas leakage from the crushed part, stagnation, touching fire, rarely cause ignition.
Please request your sales agent or qualified technician to install your unit. Water leakage, short circuit or fire may occur if you do the installation work yourself.
Please observe the instructions stated in the installation manual during the process of installation. Improper installation may cause water leakage, electric shock and fire.
Make sure that the units are mounted at locations which are able to provide full support to the weight of the units. If not, the units may collapse and impose danger.
Must install air conditioner according to the electrical installation standards for Thailand of the Engineering Institue of Thailand under The Royal Patronage of His Majesty (the King).
Be sure to use the specified wire for connecting the indoor and outdoor units. Please ensure that the connections are tight after the conductors of the wire are inserted into the terminals. Improper insertion and loose contact may cause over-heating and fire.
Please use the specified components for installation work. Otherwise, the units may collapse or water leakage, electric shock and fire may occur.
Be sure to use the specified piping set for R32. Otherwise, this may result in broken copper pipes or faults.
When installing or removing an air conditioner, only specified refrigerant (R32) shall be allowed, do not allow air or moisture to remain in the refrigeration cycle. Otherwise, pressure in the refrigeration cycle may become abnormally high so that a rupture may be caused.
Be sure to ventilate fully if a refrigerant gas leak while at work. If the refrigerant gas comes into contact with fire, a poisonous gas may occur. Be aware that refrigerants may not contain an odour.
After completion of installation work, check to make sure that there is no refrigeration gas leakage. If the refrigerant gas leaks into the room, coming into contact with fire in the fandriven heater, space heater, etc., a poisonous gas may occur.
Unauthorized modifications to the air conditioner may be dangerous. If a breakdown occurs please call a qualified air conditioner technician or electrician. Improper repairs may result in water leakage, electric shock and fire, etc.
! CAUTION
A circuit breaker must be installed. Without a circuit breaker or fuse the danger of electric shock exists. A main switch with a contact gap of more than 3mm has to be installed in the power supply line to the outdoor unit.
Do not install the unit near a location where there is flammable gas. The outdoor unit may catch fire if flammable gas leaks around it.
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.
Please ensure smooth flow of water when installing the drain hose. Piping shall be suitable supported with a maximum spacing of 1m between the supports.
SAFETY PRECAUTION
Read the safety precautions carefully before operating the unit. The contents of this section are vital to ensure safety. Please pay special attention to the following sign.
! WARNING …….. Incorrect methods of installation may cause death or serious injury.
! CAUTION ……… Improper installation may result in serious consequence. Be sure that the unit operates in proper condition after installation. Explain to customer the proper way of operating the unit as described in the user’s guide.
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THE CHOICE OF MOUNTING SITE (Please note the following matters and obtain permission from customer before installation).
! WARNING
The unit should be mounted at stable, non-vibratory location which can provide full support to the unit.
! WARNING
The outdoor unit must be mounted at a location which can support heavy weight. Otherwise, noise and vibration will increase.
INDOOR UNIT OUTDOOR UNIT
! CAUTION
No nearby heat source and no obstruction near the air outlet is allowed.
The clearance distances from top, right and left are specified in figure below.
The location must be convenient for water drainage and pipe connection with the Outdoor unit.
To avoid interference from noise please place the unit and its remote controller at least 1m from the radio, television and inverter type fluorescent lamp.
To avoid any error in signal transmission from the remote controller, please put the controller far away from high-frequency machines and high-power wireless systems.
The installation height of indoor unit must be 2.5m or more.
Names of Indoor Components
No. Component’s Name Qty Mounting Plate
Direction of Piping
! CAUTION
Selecting the installation location: Suitable location that will reduce the impact from rain and direct sun that may affect the unit performance. Besides that, ventillation must be good and clear of obstruction.
The air blown out of the unit should not point directly to animals or plants. The clearances of the unit from top, left, right and front are specified in
figure below. At least three of the above sides must be open air. Be sure that the hot air blown out of the unit and noise do not disturb
the neighbourhood. Do not install at a location where there is flammable gas, steam, oil and
smoke. The location must be convenient for water drainage. Place the outdoor unit and its connection wire at least 1m away from the
antenna or signal line of television, radio or telephone. This is to avoid noise interference. Do not install outdoor unit facing strong wind direction. It may damage the fan motor. Do not install the outdoor unit in a place where small animals may build their nests. If small animal goes inside the unit and touches the electrical parts, failure of the unit, smoke or fire may be caused. Request your customer to keep the surrounding of the unit is clean.
1
1
Figure showing the Installation of Indoor and Outdoor Unit.
Screw for Mounting Plate
2
(4.1×32) 6
Holder for Remote Controller
3
1
AAA Size Battery
4
2
Screw for holder of
Remote Controller 5
2
(3.1×16)
There are 6 directions allowed, namely, horizontally perpendicular to the unit, vertically down from right, horizontally out from right, horizontally out to left, horizontally out to right, vertically down from left.
Dimension of Mounting Stand of the outdoor unit
(unit : mm)
! CAUTION
In case the pipe length is more than the recommended length for chargeless, add refrigerant R32 as below. Do not exceed the maximum pipe length.
Model
Factory Indoor Chargeless Additional Maximum
charge R32 Amin (m2) up to
R32 charge R32
RAC-DH24PCBST 1.35kg 1.72m2
30m
1.35kg
2
Be sure to
1
completely
seal any
gap with
putty.
about 450mm
Remote Controller
6
1
Purifying Filter
7
2
! CAUTION
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.
Mechanical connectors used indoor shall comply with ISO 14903. When mechanical connectors are reused indoors, sealing parts shall be renewed. When flare joints are reused indoors, the flare part shall be re-frabricated.
Refrigerant tubing shall be protected or enclosed to avoid damage.
! WARNING
Flare connection only at outside of building
! CAUTION
Installation of pipe length less than minimum pipe length requirement (3 meters) may generate an abnormal sound.
6
4 3
Refrigerant piping must be protected from physical damage. Install a plastic cover or equivalent.
The indoor piping should be insulated with the enclosed insulation pipe. (If the insulator is insufficient, please use commercial products).
kept max. 20m.
The connection of insulated drain hose.
Please use insulated drain hose for the indoor piping (commercial product).
INDOOR UNIT
1 Installation of Hanger, Wall Penetration and Installation of Protection Pipe
! CAUTION
The draining of the water container inside the indoor unit can be done from the left. Therefore the mounting plate must be fixed horizontally or slightly tilted towards the side of drain hose. Otherwise, condensed water may overflow the water container.
Direct Mounting On The Wall
Please use hidden beams in the wall to hold the mounting plate.
15mm
660mm
145mm
145mm
42.5mm
36mm
294mm
115mm
65
105mm
67mm 950mm
Drain Hose
Level Line Weight
Screw for mounting plate Mounting plate
Wall hole
Screw the hanger at the positions possibly near the upper and lower hooks where the indoor unit is hung. Use 4 or more screws to fix the hanger.
Procedures of Installation and Precautions
Procedures to fix the mounting plate.
1. Drill holes on wall. 2. Push plug into the holes. 3. Fix the mounting plate on wall
(As shown below)
(As shown below)
with 4.1 x 32 screw
(As shown in figure below)
2 Installation of the Indoor Unit
VERTICALLY DOWNWARD PIPING
Preparation Connect connecting cord. Pull out the pipe, connecting cord and drain
hose.
Installation The upper part of the indoor unit is hanged on the mounting plate. The projection at the lower part of the indoor unit is hooked onto the mounting plate.
! CAUTION
HORIZONTAL PIPING
Please pull the lower part of the indoor unit outwards to check if the unit is hooked onto the mounting plate. Improper installation may cause vibration and noise.
Preparation
Change of Drain Hose and Installation Procedures. Exchange the location of drain hose and drain cap during horizontal piping as shown
in figure below. Be sure to plug in the drain hose until the insulating material folds upon itself.
Please use pliers to pull out the drain cap. (This is an easier way to remove the drain cap).
Connect the connecting cord after removing electrical cover. (Refer to “CONNECTION OF POWER CORD”)
After adjustment, fit the connecting cord and pipes into the space available under the indoor unit.
Drain hose
Pipe Connecting cord
Binding band
Binding band can be installed to whichever side of the installation points. However, it is recommended to attach it on the right side viewing from the rear.
Insulation pipe (must be wrapped with vinyl tape at every 120 mm)
! CAUTION
The rubber strap used for fixing the insulator should not be tied with great force. Otherwise, this will damage heat insulation and causes water condensation.
THE CONNECTION OF REFRIGERATING PIPE DURING THE
INSTALLATION OF INDOOR UNIT
Preparation To Install Refrigerating Pipes
The end of the refrigerating pipes are at locations marked with ” ” symbol.
! CAUTION
Please fix in the plastic core after flaring to avoid copper chips entering the pipes.
1100 mm
Installation
Hang the Indoor unit onto the mounting plate. Use the temporary stand at the back of the Indoor unit to push its lower part 15cm forwards. Place the drain hose through the hole on the wall. Wrap the refrigerating pipes with insulation pipe after connecting refrigerating
pipe. Connect the connecting cord after removing electrical cover. (Refer to
“Connection of Power Cord”) After adjustment, the connecting cord and refrigerating pipes are placed
into the space available under the Indoor unit. The projection of Indoor unit must hook to the mounting plate.
Projection Hook
about 15cm
Procedures to fix the holder of remote control.
1. Drill holes on wall. 2. Push plug into the holes.
(As shown below)
(As shown below)
Drain cap
Remove the cap for drain hose installation
Bottom Cover Removal and Installation When connecting the refrigerant pipe, the bottom cover can be removed for easy installation.
Bottom cover installation Put the 4 claws at front of the bottom cover into the
indoor unit notch. Push the left and right claw of bottom cover into the unit.
Refrigerating pipe
Heat insulation pipe Connecting cord
Wall hole
Pipe Cable
Drain hose
Drain layout of backward piping from left
3 Installation of Drain Hose
Claw
Indoor unit notch
Protection pipe
Drain hose Connecting cord
Bottom cover Connected
section
Wall Penetration and Installation of Protection Pipe
Drill a ø 65mm hole on
wall which is slightly tilted towards the outdoor side.
! WARNING
Drill the wall at a small angle. Cut the protection pipe according to the wall thickness. Empty gap in the sleeve
Be sure that the wire is not in contact with any metal in the wall. Please use the protection pipe as wire passing through the hollow part of the wall so as to prevent the possibility of
of protection pipe should
damaged by mouse.
be completely sealed with putty to avoid dripping of rain water into the room.
Unless it seals completely, any air with high humidity flows from outdoor and dew may drop.
! CAUTION
Condensed water may leak out if not inserted properly.
INSTALLATION OF REFRIGERATING PIPES AFTER CONNECTION
The refrigerating pipes should be adjusted to fit into the hole on the wall and then ready for further connection.
The terminals of 2 connected pipes must be covered with insulator used for terminal connection. Then the pipes are wrapped with insulation pipe.
! CAUTION
Do not guide the drain hose to places where corrosive gases (sulfur, ammonia, etc.) are generated, such as septic tanks and sewer. Corrosive gas may flow backward from the drain hose to the indoor unit, corrode the copper pipe, or it may cause offensive odors in the room.
Cut the drain hose at a position 100 mm higher than the floor surface. It may cause water leakage due to air lock or clogging of foreign matter.
! CAUTION
Above 100mm
Be sure that the drain hose is not loosely connected or bend.
!
You are free to choose the side (left or right) for the installation of drain hose. Please ensure the smooth flow of condensed water of the Indoor unit during
CAUTION installation. (Carelessness may result in water leakage.)
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OUTDOOR UNIT
Please mount the Outdoor unit on stable ground to prevent vibration and increase of noise level.
Decide the location for piping after sorting out the different types of pipe available.
Open the service valve cover by unscrewing the screws as shown below.
Use the two spanners on the service valve nuts to tighten and loosen so that the service valve will not deform. Gas leak from the crushed part, stagnation, touching fire, rarely cause ignition.
PURGING OF REFRIGERANT IS PROHIBITED Purging of refrigerant will cause the unit to be lacked of refrigerant which may affect the capacity performance and lead to severe dew formation causing problem such as dew water drop or splashing from the unit.
Do not solder pipes or other parts filled with refrigerant with low-temperature doped welding wire, such as tinalloyed lead-doped metal.
When connecting pipes. If you tighten the flare nut by excess torque, the service valve on the small pipe side may be broken. The flare nut on the small pipe side should be torqued to 122 – 165lbf. in (140 – 190kgf.cm).
! WARNING
BURST HAZARD Do not allow air, etc. to get into refrigerant cycle (piping)
RISK OF EXPLOSION Compressor must be stopped before removing refrigerant pipes. All service valve must be fully closed after pumping down operation.
INSTALLATION OF REFRIGERATING PIPES AND AIR REMOVAL
1 Preparation of Pipe
Use a pipe cutter to cut the copper pipe.
! CAUTION
Jagged edge will cause leakage. Point the side to be trimmed downwards during trimming to prevent copper
chips from entering the pipe. Before flaring, please put on the flare nut.
Recommend to use R32 flaring tool.
Outer
Thickness
Diameter (mm) (mm)
6.35 (1/4)
0.8
12.70 (1/2)
0.8
Flare tool for R32
Clutch type
0.0 ~ 0.5 0.0 ~ 0.5
A (mm)
Conventional flare tool
Clutch type Wing nut type
1.0~1.5
1.5~2.0
1.0~1.5
1.5~2.5
2 Pipe Connection
! CAUTION
When removing flare nut from the Indoor unit, please ensure to use proper tooling.
Prevent pipe from coming in contact with water or working in wet area.
Small dia. side
Outer dia.of pipe
Torque N·m (kgf · cm)
6.35 (1/4″) 13.7 18.6 (140 190)
Large dia. side
12.7 (1/2″) 44.1 53.9 (450 550)
Valve Small dia. side 6.35 (1/4″) 19.6 24.5 (200 ~ 250) head cap Large dia. side 12.7 (1/2″) 29.4 34.3 (300 ~ 350)
Valve core cap
12.3 15.7 (125 ~ 160)
3 Removal Of Air From The Pipe And Gas Leakage Inspection
Procedures of using Vacuum Pump for Air Removal
As shown in right figure, remove the cap of valve core. Then, connect the charge hose.
1 Remove the cap of valve head. Connect the
vacuum pump adapter to the vacuum pump and connect the charge hose to the adapter.
Fully tighten the “Hi” knob of the manifold valve and completely unscrew the “Lo” knob. Run the vacuum pump for about 10~15
2 minutes, then completely tighten the “Lo”
knob and switch off the vacuum pump. After vacuuming, confirm that the needle of the manifold gauge is stable for 3~5 minutes.
When the meter reaches – 101KPa (-76cmHg) during pumping, fully tighten the shuttle.
Meter showing pressure
Lo Hi
Charge hose
Valve
Valve
Closed
R32 Manifold valve
Vacuum pump
Vacuum pump adapter
When pumping starts, slightly loosen the flare nut to check of air sucked in. Then tighten the flare nut.
AIR REMOVAL
Remove the charge hose and tighten the cap
3 of valve core. Check the cap’s periphery if
there is any gas leakage.
Completely unscrew the spindle of the
4
service valve (at 2 places) in anti-clockwise direction to allow the flow of refrigerant (using
Hexagonal Wrench key).
Re-cap the service valve and tighten using
5 wrench. Check the cap’s periphery if there is
any gas leakage. The task is then completed.
! CAUTION
Prevent moisture from entering pipe connection. Refrigerating machine oil not be applied to the outside
of the flare. When refrigerating oil is applied to the outside of the flare, cracking of the flare nut, destruction of the flare and gas leakage may occur due to the excessive tightening of the flare nut. When using the control valve, do not use deteriorated packing. And, do not overtighten the steering wheel. Gas leakage from the service valve part, stagnation, touching fire, rarely cause ignition.
Gas Leakage Inspection
Please use gas leakage detector to check if leakage occurs at the connection of Flare nut as shown on the right.
If gas leakage occurs, further tighten the connection to stop leakage. (Use the detector provided for R32)
WARNING
CONNECTION OF POWER CORD
! WARNING THIS APPLIANCE MUST BE EARTHED.
Must install air conditioner according to the electrical installation standards for Thailand of the Engineering Institue of Thailand under The Royal Patronage of His Majesty (the King).
Procedures of Wiring
In case that power is supplied from Indoor Unit
! WARNING
Leave some space in the connecting cord for maintenance purpose and be sure to secure it with the cord band.
Secure the connecting cord along the coated part of the wire using the cord band. Do not exert pressure on the wire as this may cause overheating or fire.
Supply cords, current- carrying conductors become taut before earthing conductor, if the cord slips out of the cord band.
Detail of cutting the connecting cord Outdoor Unit
Indoor Unit
Checking for the electric source and the voltage range
Before installation, the power source must be checked and necessary wiring work must be completed. To make the wiring capacity proper, use the wire gauge list below for the wiring from house distribution fuse box to the outdoor unit in consideration of the locked rotor current.
Investigate the power supply capacity and other electrical conditions at the installation location. Depending on the model of room air conditioner to be installed, request the customer to make arrangements for the necessary electrical work etc. The electrical work includes the wiring work up the outdoor. In localities where electrical conditions are poor, use of a voltage regulation is recommended.
Wiring Of The Indoor Unit
For wire connection of the Indoor unit, you need to remove front panel and electrical cover.
Method to remove front panel Please refer to Instruction Manual “Removing the Front Panel”
under “Cleaning of Front Panel”.
When removing the connecting wires for the indoor unit, please remove the low cover panel in front of the unit.
! WARNING
The naked part of the wire core should be 10 mm fix it to the terminal tightly. Then try to pull the individual wire to check if the contact is tight. Improper insertion may burn the terminal.
Be sure to use only wire specified for the use of air-conditioner.
Please refer to the manual for wire connection and the wiring technique should meet the standard of the electrical installation.
There is an AC voltage drop between the LN terminal if the power is on. Therefore, be sure to remove the plug from its socket.
After remove the screw and band, put the connecting cords and fix the band with screw.
Connect the earth cord
Method to remove electrical cover
Remove the screw and electrical cover. Insert the connecting cord (1, 2, 3) from the back of unit. Fixed the wire to terminal wires firmly as shown as below.
Screw
Electrical cover Connecting cord
Wiring Of The Outdoor Unit
Please remove the side plate for wire connection.
If you cannot attach the side plate due to the connecting
cord, press the connecting cord in direction to the front
!
panel to fix it.
WARNING
Be sure that the hooks of the side plate is fixed in certainly. Otherwise water leakage may occur and this causes short
circuit or faults.
1 2 3 Earth terminal
IMPORTANT
Wire length Wire gauge
up to 30m
1.5mm2
! CAUTION
Note: Outdoor supply cords shall not be
lighter than polychloroprene sheathed flexible cord, 60245 IEC 57.
IMPORTANT Fuse Capacity 16A
HOW TO REMOVE OR ATTACH THE FRONT COVER
How to Remove the Front Cover
1 Remove the front panel Move
2
Arm
1
1 Push the end of the right-side arm outward to release the tab.
2 Move the left-side arm outward to release the left tab, and then pull the panel towards you.
2 Remove the filters.
3 After removing 3 screws, remove the cover of electric box, pull the center of the front cover towards you and release the claws.
4 Pull the side faces (lower sections) of the front cover towards you as shown in the figure and remove the cover.
How to Attach the Front Cover
1 After installing the front cover onto the unit, hook three claws at upper side of the cover securely. Then, push the center of the front cover to lock the claws.
2 Assemble the cover of electric box.
3 Tighten the 3 screws.
4 Install the filter.
5 Attaching the Front Panel
Insert the shaft of the left arm along the step on the unit into the hole.
Securely insert the shaft of the right arm along the step on the unit
into the hole.
Make sure that the front panel is securely attached, and then close
the front panel. Claw
Claw
Claw Cover Screw
Claw
! CAUTION
Please remove this spacer as it is for transportation purposes only. Vibration and noise might occur if it is not removed.
Screw
HOW TO REMOVE INDOOR UNIT
Push up the (PUSH) sections at the bottom of the indoor unit and pull the bottom plate towards you. Then the claws are released from the stationary plate. (The (PUSH) sections are indicated by 2 arrows as below figure)
FINAL STAGE OF INSTALLATION
1
Insulation And Maintenance Of Pipe Connection
The connected terminals should be completely sealed with heat insulator and then tied up with rubber strap.
Please tie the pipe and power line together with vinyl tape as shown in the figure showing the installation of Indoor and Outdoor units. Then fix their position with holders.
To enchance the heat insulation and to prevent water condensation, please cover the outdoor part of the drain hose and pipe with insulation pipe.
Completely seal any gap with putty.
3
Power Source And Operation Test
Power Source
! CAUTION
Please use a new socket. Accident may occur due to the use of old socket because of poor contact.
Please plug in and then remove the plug for 2 3 times. This is to ensure that the plug is completely plugged into the socket.
Keep additional length for the power cord and do not render the plug under external force as this may cause poor contact.
Do not fix the power cord with U-shape nail.
Operation Test
Please ensure that the air conditioner is in normal operating condition during the operation test.
Explain to your customer the proper operation procedures as described in the user’s manual.
Trial run
Be sure to measure the supply voltage before connecting the power cord into the power outlet.
Perform a trial run to make sure that the air
conditioner operates properly.
1. Operate with Cooling Mode.
2. Press the ROOM TEMPERATURE button to set the
temperature to 16°C for cooling mode. Set the fan
speed to ”
” (High).
3. Operate the air conditioner for at least 20 minutes
and make sure that the air from the air conditioner
is cool.
4. Press the ON/Off button on the remote controller to
make sure that the air conditioner stops running.
If the indication lamps of the indoor unit blink with
sounding the buzzar during the operation test,
perform a check following the procedures below.
Indicator Blinking Mode
What to check
All indicators blink once repeatedly
Make sure that the voltage of the power outlet is correct according to the product specification.
All indicators blink twice repeatedly.
Make sure that the connecting cord is connected correctly and securely.
All indication lamps blink three times repeatedly.
Make sure that the spindles of both service valves are open. (Outdoor fan might operate for near 15 minutes after the operation stop for the protection. For the reoperation at that case, do it after outdoor fan will stop.)
If connecting cord cable connection is not correct, the timer lamp may blink 12 times or blink 21 times during the operation test. If this occurs, check the connection of the connecting cord cable. Please check the service guide for details.
To reset the power supply by switching the circuit breaker OFF, and ON only after waiting for at least 5 minutes; or pressing the temporary switch button only once while the power is OFF.
! CAUTION
Don’t operate for over 5 minutes with the situation that the spindle of the service valve is closed. This will cause the defect.
Don’t operate by Cool Mode or Dry Mode with the door and windows opened, (the room humidity is always above 80%) for a long period of time. Water will condense and drip down occasionally. This will wet your furniture.
Explain to your customer the proper operation procedures as described in the user`s manual.
If the indoor unit won`t operate, check the cable for correct connection.
Turn on the lamp in the room where the indoor unit is installed and check the remote controller for normal operation.
Pump Down Method When Reuse Existing Piping (R410A Model) for R32 Model
Compressor oil of R410A model is insoluble in compressor oil of R32 model. The mixing of compressor oil may cause damage of compressor.
Possibility of Mixing Reuse of piping of R410A model is dangerous because of its
compressor oil.
When reuse piping of R410A model, pump down must be carried out properly to ensure compressor oil which is remained inside piping is collected away.
! CAUTION
Reuse of piping R410A model only apply if previous model is Hitachi and proper pump down method is used.
2
Installation Of Remote Controller
The remote controller can be placed in its holder which is fixed on wall or beam.
To operate the remote controller at its holder, please ensure that the unit can receive signal transmitted from the controller at the place where the holder is to be fixed. The unit will beep when signal is received from the remote controller. The signal transmission is weaken by the fluorescent light. Therefore, during the installation of the remote control holder, please switch on the light, even during day time, to determine the mounting location of the holder.
The controller should be insert from top into bottom side of the holder as shown below.
To Reuse Old Piping
Piping of R410A model can be reused only when air-conditioner is properly pumped down.
The purpose of pump down is to collect back the compressor oil (which is mixed with refrigerant and circulating inside refrigeration cycle) properly into the outdoor unit of air conditioner.
Proper Pump Down Method 1 Operate air conditioner at cooling mode for 10~15 minutes
Most Important Process Purpose: To make the oil & refrigerant mix together. They are in separated condition when air conditioner is stopped.
2 After 10~15 minutes of pre operation, close 2s valve. After 3 minutes, close 3s valve.
Mixed refrigerant & oil will be collected into outdoor unit.
3 Take out air conditioner unit.
It is advisable to flush the piping with R32 to avoid any contamination remain before new installation.
4 Install New Refrigerant air conditioner
! WARNING
Transport Details Marking and storage Air conditioners that use flammable refrigerants. Transportation of air conditioners containing combustible
refrigerant Disposal of air conditioners using flammable refrigerants Air conditioning storage Storage of air conditioners in packaging (not yet sold)
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Explanation of symbols displayed on unit
WARNING
This symbol shows that this equipment uses a flammable refrigerant. If the refrigerant is leaked, together with an external ignition source, there is a possibility of ignition.
CAUTION
This symbol shows that the Operation Instructions 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 there is information included in the Operation Manual and/or Installation Manual.
! WARNING
Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer. Any unfit method or using incompatible material may cause product damage, burst and serious injury.
The appliance/pipe-work shall be stored in a well ventilated room with floor area larger than Amin(m2) and without any continuously operating ignition source. Keep away from open flames, any operating gas appliances or any operating electric heater. Else, it may explode and cause injury or death.
The appliance/pipe-work shall be installed, and/or operated in a room with floor area larger than Amin(m2) and keep away ignition sources, such as heat/spark/open flame or hazardous areas such as gas appliances, gas cooking, reticulated gas supply systems or electric cooking appliances, etc.
Do not pierce or burn as the appliance is pressurized. Do not expose the appliance to heat, flame, sparks, or other sources of ignition. Else, it may explode and cause injury or death.
Documents / Resources
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HITACHI RAK-DH24PCBST, RAC-DH24PCBST Split Unit Air Conditioner [pdf] Installation Guide RAK-DH24PCBST, RAC-DH24PCBST, RAK-DH24PCBST RAC-DH24PCBST Split Unit Air Conditioner, RAK-DH24PCBST RAC-DH24PCBST, Split Unit Air Conditioner, Unit Air Conditioner, Air Conditioner, AC |
