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INSTALLATION MANUAL English AIR CONDITIONER INDOOR UNIT (Cassette Type) For authorized service personnel only. Refer to the rating label with the serial number. MADE IN THAILAND PART No. 9381798025-03 9381798025-03_IM_EN.indd i 9/29/2560 BE 16:37 INSTALLATION MANUAL CAUTION PART No. 9381798025-03 Indoor Unit (Cassette Type) Indicates a potentially hazardous situation that may result in minor or moderate injury or damage to property. Read carefully all safety information written in this manual before you install or use the air conditioner. Contents 1. SAFETY PRECAUTIONS ……………………………………………………………… 1 Install the product by following local codes and regulations in force at the place of installation, and the instructions provided by the manufacturer. 2. ABOUT THIS PRODUCT ………………………………………………………………… 1 2.1. Special tools for R410A …………………………………………………………… 1 2.2. Accessories ………………………………………………………………………… 1 2.3. Optional parts ……………………………………………………………………… 2 This product is part of a set constituting an air conditioner. The product must not be installed alone or be installed with non-authorized device by the manufacturer. 3. GENERAL SPECIFICATION …………………………………………………………… 2 3.1. Selecting the pipe material ………………………………………………………… 2 3.2. Pipe requirement …………………………………………………………………… 2 3.3. Electrical requirement ……………………………………………………………… 3 To protect the persons, earth (ground) the product correctly, and use the power cable combined with an Earth Leakage Circuit Breaker (ELCB). 4. INSTALLATION WORK ………………………………………………………………… 3 4.1. Selecting an installation location ………………………………………………… 3 4.2. Installation dimension ……………………………………………………………… 3 4.3. Installing the unit …………………………………………………………………… 3 4.4. Installing the drain pipe …………………………………………………………… 4 Do not touch the fins of the heat exchanger. Touching the heat exchanger fins could result in damage to the fins or personal injury such as skin rupture. 5. PIPE INSTALLATION …………………………………………………………………… 5 5.1. Flare connection (pipe connection) ……………………………………………… 5 5.2. Installing heat insulation …………………………………………………………… 6 This product contains no user-serviceable parts. Always consult experienced service technicians for repairing. 6. ELECTRICAL WIRING …………………………………………………………………… 6 6.1. Wiring method ……………………………………………………………………… 7 7. CASSETTE GRILLE INSTALLATION…………………………………………………… 8 8. REMOTE CONTROLLER INSTALLATION …………………………………………… 8 9. FUNCTION SETTING …………………………………………………………………… 8 9.1. Turning on the power ……………………………………………………………… 8 9.2. Setting method ……………………………………………………………………… 8 9.3. RC Sensor setting ………………………………………………………………… 8 9.4. Function Details …………………………………………………………………… 9 10. SPECIAL INSTALLATION METHODS ……………………………………………… 10.1. Setting the address ……………………………………………………………… 10.2. Setting the DIP switch …………………………………………………………… 10.3. Group control …………………………………………………………………… 10 10 10 10 11. OPTION AND OTHER CONNECTABLE DEVICES ………………………………… 11 11.1. Optional parts …………………………………………………………………… 11 11.2. External input and output ……………………………………………………… 11 Always use a separate power supply line protected by a circuit breaker operating on all wires with a distance between contact of 3 mm for this product. This product is not explosion proof, and therefore should not be installed in explosive atmosphere. To avoid getting an electric shock, never touch the electrical components soon after the power supply has been turned off. After turning off the power, always wait 5 minutes or more before you touch the electrical components. When moving or relocating the air conditioner, consult experienced service technicians for disconnection and reinstallation of the product. Do not place any other electrical products or household belongings under the product. Condensation dripping from the product might get them wet, and may cause damage or malfunction to the property. 2. ABOUT THIS PRODUCT 2. 1. Special tools for R410A Tool name Gauge manifold 12. CHECK LIST …………………………………………………………………………… 12 13. TEST RUN ……………………………………………………………………………… 12 14. CUSTOMER GUIDANCE ……………………………………………………………… 12 Pressure is high and cannot be measured with a R22 gauge. To prevent erroneous mixing of other refrigerants, the diameter of each port has been changed. It is recommended to use gauge with seals -0.1 to 5.3 MPa (-1 to 53 bar) for high pressure. -0.1 to 3.8 MPa (-1 to 38 bar) for low pressure. Charge hose To increase pressure resistance, the hose material and base size were changed. (R410A) Vacuum pump A conventional vacuum pump can be used by installing a vacuum pump adapter. (Use of a vacuum pump with a series motor is prohibited.) 15. ERROR CODES ……………………………………………………………………… 12 Note: This manual describes how to install the air conditioner described above. Handling and installation shall only be done by professionals as outlined in this manual. Change from R22 to R410A Gas leakage detector Special gas leakage detector for HFC refrigerant R410A. Copper pipes 1. SAFETY PRECAUTIONS • Be sure to read this manual thoroughly before installation. • The warnings and precautions indicated in this Manual contain important information pertaining to your safety. Be sure to observe them. • Hand this Manual, together with the operating manual, to the customer. Request the customer to keep them on hand for future use, such as for relocating or repairing the unit. WARNING Indicates a potentially or imminently hazardous situation which, if not avoided, could result in death or serious injury. Installation of this product must be done by experienced service technicians or professional installers only in accordance with this manual. Installation by nonprofessional or improper installation of the product may cause serious accidents such as injury, water leakage, electric shock, or fire. If the product is installed in disregard of the instructions in this manual, it will void the manufacturer’s warranty. Do not turn on the power until all work has been completed. Turning on the power before the work is completed can cause serious accidents such as electric shock or fire. If refrigerant leaks when you are working, ventilate the area. If the leaking refrigerant is exposed to a direct flame it may produce a toxic gas. Do not use this equipment with air or any other unspecified refrigerant in the refrigerant lines. Excess pressure can cause a rupture. Installation must be performed in accordance with regulations, codes, or standards for electrical wiring and equipment in each country, region, or the installation place. 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. It is necessary to use seamless copper pipes and it is desirable that the amount of residual oil is less than 40 mg/10 m. Do not use copper pipes having a collapsed, deformed or discolored portion (especially on the interior surface). Otherwise, the expansion valve or capillary tube may become blocked with contaminants. As an air conditioner using R410A incurs pressure higher than when using R22, it is necessary to choose adequate materials. WARNING • Use specified R410A piping only. For indoor units, use R410A flare less joint nut assy only. For outdoor units, use R410A flare nuts only. Use of pipes, flare less nuts or flare nuts other than specified, may cause product malfunction, burst piping, or injury due to high internal pressure of the refrigerant cycle caused by any inflow air. • Use (refill or replace with) specified refrigerant (R410A) only. Use of unspecified refrigerant can cause product malfunction, burst, or injury. • Do not mix any gas or impurities except specified refrigerant (R410A). Inflow of air or application of unspecified material makes the internal pressure of the refrigerant cycle too high, and may cause product malfunction, burst of piping, or injury. 2. 2. Accessories WARNING For installation purposes, be sure to use the parts supplied by the manufacturer or other prescribed parts. The use of non-prescribed parts can cause serious accidents such as the unit falling, water leakage, electric shock, or fire. • The following installation parts are furnished. Use them as required. • Keep the installation manual in a safe place and do not discard any other accessories until the installation work has been completed. En-1 9381798025-03_IM_EN.indd 1 9/29/2560 BE 16:37 Name and Shape Installation manual Template (Carton top) Q’ty 1 Description 3. 1. Selecting the pipe material For installing indoor unit Do not use existing pipes. For installing indoor unit 8 For indoor side pipe joint (Gas pipe) Coupler heat insulation (Large) 1 Coupler heat insulation (Small) 1 For indoor side pipe joint (Liquid pipe) For installing drain pipe Insulation 1 Hose Band CAUTION 1 Washer Drain hose 3. GENERAL SPECIFICATION (This book) 1 1 Drain hose heat insulation For installing drain pipe VP25 (O.D.32, I.D.25) For installing drain hose For installing drain pipe Use pipes that have clean external and internal sides without any contamination which may cause trouble during use, such as sulfur, oxide, dust, cutting waste, oil, or water. It is necessary to use seamless copper pipes. Material : Phosphor deoxidized seamless copper pipes It is desirable that the amount of residual oil is less than 40 mg/10 m. Do not use copper pipes that have a collapsed, deformed, or discolored portion (especially on the interior surface). Otherwise, the expansion valve or capillary tube may become blocked with contaminants. Improper pipe selection will degrade performance. As an air conditioner using R410A incurs pressure higher than when using conventional refrigerant, it is necessary to choose adequate materials. • Thicknesses of copper pipes used with R410A are as shown in the table. • Never use copper pipes thinner than those indicated in the table even if they are available on the market. Pipe outside diameter [mm (in.)] Thickness [mm] 6.35 (1/4) 0.8 1 Cable tie (Large) For connection pipe fixing. 4 Only one is used for this model. Cable tie (Small) 9.52 (3/8) 0.8 12.70 (1/2) 0.8 15.88 (5/8) 1.0 19.05 (3/4) 1.2 2 3. 2. Pipe requirement Remote controller cable For connecting the remote controller 1 CAUTION Refer to the installation manual of the outdoor unit for description of the length of connecting pipe or for difference of its elevation. 2. 3. Optional parts Parts name Model No. Summary Wired Remote Controller UTY-RNR*Z1 For air conditioner operation (2-wire type) IR receiver unit UTY-LBT*C* For air conditioner operation Wide panel UTG-AKXA-W Wide panel hides the gap between the ceiling hole and the Cassette grille. Panel spacer UTG-BKXA-W Installation in a space of 56 mm or greater is possible by using panel spacer when the height behind the ceiling is low. Air outlet shutter plate UTR-YDZK Install the plate at outlet when carrying out 3-way direction operation Insulation kit for High humidity UTZ-KXRA Install when the condition under the roof is over 80% in humidity and over 30°C in temperature. External input and output PCB UTY-XCSX For connecting external devices External input and output PCB box UTZ-GXRA For installing the External input and output PCB External connect kit Communication kit UTY-XWZXZG For control output port UTY-TWRXZ1 For wired remote controller (2-wire type) Type Diameter [mm (in.)] Liquid Gas 18/25 6.35 (1/4) 15.88 (5/8) 40/50 9.52 (3/8) 19.05 (3/4) • Use pipe with water-resistant heat insulation. CAUTION Install heat insulation around both the gas and liquid pipes. Failure to do so may cause water leaks. Use heat insulation with heat resistance above 120 °C. (Reverse cycle model only) In addition, if the humidity level at the installation location of the refrigerant piping is expected to exceed 70 %, install heat insulation around the refrigerant piping. If the expected humidity level is 70-80 %, use heat insulation that is 15 mm or thicker and if the expected humidity exceeds 80 %, use heat insulation that is 20 mm or thicker. If heat insulation is used that is not as thick as specified, condensation may form on the surface of the insulation. In addition, use heat insulation with heat conductivity of 0.045 W/(m·K) or less (at 20 °C). En-2 9381798025-03_IM_EN.indd 2 9/29/2560 BE 16:37 3. 3. Electrical requirement The indoor unit is powered from the outdoor unit. Do not power indoor unit from separate power source. WARNING Standard for electrical wiring and equipment differs in each country or region. Before you start electrical working, confirm related regulations, codes, or standards. Cable Conductor size (mm2) Type Remarks Connection cable 1.5 (MIN.) Type 60245 IEC57 3Wire+Earth (Ground) Max. Cable Length: Limit voltage drop to less than 2%. Increase cable gauge if voltage drop is 2% or more. Conductor size (mm2) Type Remote controller cable (3-wire type) 0.33 Sheathed PVC cable Polar 3 wire Remote controller cable (2-wire type) 0.33 to 1.25 Sheathed PVC cable Non-polar 2 wire, twisted pair Correct initial installation location is important because it is difficult to move unit after it is installed. 4. 2. Installation dimension • The ceiling rear height as shown in the figure. Unit: m Remarks 3 or more 4. INSTALLATION WORK 1 or more Strong and durable ceiling 1.8 or more Cable (1) Locate where the air can be distributed evenly throughout the room by the unit. (2) The inlet and outlet ports should not be obstructed; the air should be able to blow all over the room. (3) Leave the space required to service the air conditioner. (4) Install the unit where connection to the outdoor unit is easy. (5) Install the unit where the connection pipe can be easily installed. (6) Install the unit where the drain pipe can be easily installed. (7) Install the unit where noise and vibrations are not amplified. (8) Take servicing, etc., into consideration and leave the spaces. Also install the unit where the filter can be removed. (9) Do not install the unit where it will be exposed to direct sunlight. 1.5 or more Obstruction Floor WARNING Do not turn on the power until all installation work is complete. Carrying and installation of the unit should be performed by a sufficient number of people and with sufficient equipment that is adequate for the weight of the unit. Performing such work with an insufficient number of people or with inadequate equipment could result in dropping of the unit or personal injury. • This product can be installed at a height of up to 4.2 m. However, if the heights of the ceiling is higher than 3.2 m or lower than 2.7 m, it is necessary to set the position from remote controller. (See 9. FUNCTION SETTING) Unit : mm Discharge direction setting • The discharge direction can be selected as shown in the following figure. 100 or more* CAUTION For installation details, refer to the technical data. * Please ensure sufficient service access during installation. 4. 1. Selecting an installation location Decide the mounting position together with the customer as follows. WARNING Select installation locations that can properly support the weight of the indoor unit and which will not amplify sound or vibration. If the installation location is not strong enough, the indoor unit may fall and cause injuries. Install the units securely so that they do not topple or fall. CAUTION Do not install the indoor unit in the following areas: • Area with high salt content, such as at the seaside. It will deteriorate metal parts, causing the parts to fall or the unit to leak water. • Area filled with mineral oil or containing a large amount of splashed oil or steam, such as a kitchen. It will deteriorate plastic parts, causing the parts to fall or the unit to leak water. • Area that generates substances that adversely affect the equipment, such as sulfuric gas, chlorine gas, acid, or alkali. It will cause the copper pipes and brazed joints to corrode, which can cause refrigerant leakage. • Area that can cause combustible gas to leak, contains suspended carbon fibers or flammable dust, or volatile inflammables such as paint thinner or gasoline. If gas leaks and settles around the unit, it can cause a fire. • Area where animals may urinate on the unit or ammonia may be generated. Do not use the unit for special purposes, such as storing food, raising animals, growing plants, or preserving precision devices or art objects. It can degrade the quality of the preserved or stored objects. Do not install where there is the danger of combustible gas leakage. (4 directions) (3 directions) • For a 3-way outlet, make sure to perform the function setting on the remote control. Also, make sure to use the optional shutter plate to block the outlet. • The ceiling height cannot be set in the 3-way outlet mode. Therefore, do not change the setting in the setting the ceiling height. (See 9. FUNCTION SETTING) • When the outlet is shut, be sure to install the optional Air outlet shutter plate kit. For the details of installation, please refer to installation manual of the kit. 4. 3. Installing the unit WARNING Carrying and installation of the unit should be performed by a sufficient number of people and with sufficient equipment that is adequate for the weight of the unit. Performing such work with an insufficient number of people or with inadequate equipment could result in dropping of the unit or personal injury. If the job is done with the panel frame only, there is a risk that the unit will come loose. Please take care. When fastening the hangers, make the bolt positions uniform. Do not install the unit near a source of heat, steam, or flammable gas. Install the unit where drainage does not cause any trouble. Install the indoor unit, outdoor unit, power supply cable, transmission cable, and remote control cable at least 1 m away from a television or radio receivers. The purpose of this is to prevent TV reception interference or radio noise. (Even if they are installed more than 1 m apart, you could still receive noise under some signal conditions.) Install the unit where ambient temperature does not reach 60°C or more. Take a measure such as ventilation for an environment in which heat is retained. If children under 10 years old may approach the unit, take preventive measures so that they cannot reach the unit. Install the indoor unit on the place where the height from the floor is more than 1.8 m. Use the “Insulation kit for high humidity” (option), when the condition under the roof is over 80% in humidity and over 30°C in temperature. Otherwise, there is a risk of condensation on the ceiling. En-3 9381798025-03_IM_EN.indd 3 9/29/2560 BE 16:37 4.3.1. Position the ceiling hole and hanging bolts (1) Positions of the ceiling opening, hanging bolt pitch, piping and ducts. • Ceiling opening and hanging bolt pitch. 130 200 50 130 130 Unit: mm 50 - 100 200 - 205 • Use hanging bolts of M8-M10. A B 4.3.2. Body installation (1) Install the attached washer and nut (prepared on site) onto the hanging bolt. (2) Hook the body onto the hanging bolt. (3) Adjust the dimensions of the ceiling surface from the body. After installing the Cassette grille, you can make fine adjustment of the height of the body. For details, refer to the installation manual of the Cassette grille. 39 10 130 20 - 45 20 - 45 840(Body frame) 20 - 45 860 - 910(Ceiling opening) 950(Panel frame) 768(Hanging bolt pitch) 20 - 45 950(Panel frame) 860 - 910(Ceiling opening) 840(Body frame) 796(Hanging bolt pitch) (2) Setting the positions of hanging bolt and ceiling opening. • Use an installation template (packaging top surface) to set the positions of the hanging bolt and ceiling opening and drill holes. (3) Hanging structure. • Select a strong structure for the hanging location. • If necessary, reinforce the hanging bolt with quake proof columnar support material to prevent shaking. Dimension (mm) Type A B 18/25 246 256 40/50 288 298 • Refrigerant piping and drain piping positions. WARNING Perform final tightening by tightening the double nut firmly. Be sure to install the body horizontally and adjust the height below the body and the ceiling surface properly. Unit: mm 80 Hanging bolt (locally purchased) 10 Nut A (locally purchased) Liquid pipe 293 45 After installing the body, tighten the nuts. 180 140 342 Washer (Accessories) • Distribution ducts and fresh air inlet positions. 100 83 100 83 Cut out Drain pipe Refrigerant pipe Using a level, or vinyl hose filled with water, fine adjust so that the body is level. Inclined installation so as the drain pipe side is higher may cause a malfunction of the float switch, and may cause water leakage. Drain pipe 10 × 3.2 hole 352 Detailed diagram of distribution duct connecting port (4 sides) 114 bolt pitch 232 Unit: mm 4.3.3. Leveling 163 90 Distribution duct connecting port Distribution duct connecting port Distribution duct connecting port Fresh air inlet position Nut B (Double Nut) (locally purchased) Unit: mm 10~15 200 Drain pipe (Connect the attached drain hose) Washer (Accessories) Gas pipe 95 Cut out 163 Distribution duct connecting port 4× Fresh air inlet position Vinyl hoses 3.2 hole NOTES: Conduct proper insulation when connecting the distribution ducts and fresh air inlet. Insulation 4. 4. Installing the drain pipe WARNING Do not insert the drain piping into the sewer where sulfurous gas occurs. (Heat exchange erosion may occur.) Insulate the parts properly so that water will not drip from the connection parts. Check for proper drainage after the construction by using the visible portion of transparent drain port and the drain piping final outlet on the body. CAUTION Do not apply adhesive agent on the drain port of the body. (Use the attached drain hose and connect the drain piping.) Fresh air inlet position NOTES: When introducing fresh air into the indoor unit, please remove the insulation affixed to the drain pan. Install the drain pipe: • Install the drain pipe with downward gradient (1/50 to 1/100) and so there are no rises or traps in the pipe. • Use general hard polyvinyl chloride pipe (VP25) [outside diameter 32 mm] and connect it with adhesive (polyvinyl chloride) so that there is no leakage. • When the pipe is long, install supporters. • Do not perform air bleeding. • Always heat insulate the indoor side of the drain pipe. • If it is impossible to have sufficient gradient of pipe, perform drain lift-up. En-4 9381798025-03_IM_EN.indd 4 9/29/2560 BE 16:37 (a) Top view Pipe size Drain pipe (b) Side view VP25 VP25 (O.D. 32 mm) Hanging fittings Applying area of adhesive 35 1.5 to 2 m Hose band Gauge line (d) Hose opening view 5-10 20 VP25 (O.D. 32 mm) Downward gradient 1/100 to 1/50 PROHIBITED: Wind the attached heat insulation around the hose band Make sure the alignment is on top (c) Top view Trap Rise Air bleeding When lifting up drain: • Height of inclined pipe should be less than 850 mm from the ceiling. A rise dimension over this range will cause leakage. • Lift up the pipe vertically at the position of 300 mm or less from the unit. Downward gradient 300 mm or less 1/100 to 1/50 VP25 (O.D. 32 mm) local arrangement 850 mm or less Horizontal or upward gradient 850 mm or less 4 or less VP30 (O.D. 38 mm) or more Downward gradient 1/100 to 1/50 Make sure there are no gaps Unit: mm 5. PIPE INSTALLATION WARNING During installation, make sure that the refrigerant pipe is attached firmly before you run the compressor. Do not operate the compressor under the condition of refrigerant piping not attached properly with 2-way or 3-way valve open. This may cause abnormal pressure in the refrigeration cycle that leads to breakage and even injury. During the pump-down operation, make sure that the compressor is turned off before you remove the refrigerant piping. Do not remove the connection pipe while the compressor is in operation with 2-way or 3-way valve open. This may cause abnormal pressure in the refrigeration cycle that leads to breakage and even injury. When installing and relocating the air conditioner, do not mix gases other than the specified refrigerant R410A to enter the refrigerant cycle. If air or other gas enters the refrigerant cycle, the pressure inside the cycle will rise to an abnormally high value and cause breakage, injury, etc. If refrigerant leaks while work is being carried out, ventilate the area. If the refrigerant comes in contact with a flame, it produces a toxic gas. Working procedure (1) Install the attached drain hose to the drain port of the body. Attach hose band on top of the drain hose. (2) Use vinyl adhesive agent to glue the drain piping (PVC pipe VP25) which is prepared on site or elbow socket. (Apply color adhesive agent evenly until the gauge line and seal.) (3) Check the drainage. (4) Install the heat insulation. (5) Use the attached heat insulation to insulate the drain port and band parts of the body. Install the knob faces upward Attached hose band CAUTION Be more careful so that foreign matter (oil, water, etc.) does not enter the piping than with refrigerant R410A models. Also, when storing the piping, securely seal the openings by pinching, taping, etc. While brazing the pipes, be sure to purge with dry nitrogen gas. 5. 1. Flare connection (pipe connection) 5.1.1. Flaring Attached drain hose heat insulation Locally arranged vinyl pipe Attached drain hose • Use special pipe cutter and flare tool exclusive for R410A. (1) Cut the connection pipe to the necessary length with a pipe cutter. (2) Hold the pipe downward so that cuttings will not enter the pipe and remove any burrs. (3) Insert the flare nut (always use the flare nut attached to the indoor and outdoor units respectively) onto the pipe and perform the flare processing with a flare tool. Leakage of refrigerant may result if other flare nuts are used. (4) Protect the pipes by pinching them or with tape to prevent dust, dirt, or water from entering the pipes. Check if [L] is flared uniformly and is not cracked or scratched. B Die A Attached heat insulation Pipe L En-5 9381798025-03_IM_EN.indd 5 9/29/2560 BE 16:37 Dimension A [mm] Pipe outside diameter Flare tool for R410A, clutch [mm (in.)] type 0 Dimension B-0.4 [mm] 6.35 (1/4) 9.52 (3/8) 12.70 (1/2) 0 to 0.5 Tightening torque [N·m (kgf·cm)] 6.35 (1/4) dia. 16 to 18 (160 to 180) 9.52 (3/8) dia. 32 to 42 (320 to 420) 9.1 12.70 (1/2) dia. 49 to 61 (490 to 610) 13.2 15.88 (5/8) dia. 63 to 75 (630 to 750) 16.6 19.05 (3/4) dia. 90 to 110 (900 to 1,100) 15.88 (5/8) 19.7 19.05 (3/4) 24.0 When using conventional flare tools to flare R410A pipes, the dimension A should be approximately 0.5 mm more than indicated in the table (for flaring with R410A flare tools) to achieve the specified flaring. Use a thickness gauge to measure the dimension A. Width across flats Flare nut [mm (in.)] Pipe outside diameter [mm (in.)] Width across flats of Flare nut [mm] 6.35 (1/4) 17 9.52 (3/8) 22 12.70 (1/2) 26 15.88 (5/8) 29 19.05 (3/4) 36 5.1.2 Bending pipes 5. 2. Installing heat insulation Install the heat insulation material after performing a refrigerant leak check (see the Installation Manual for the outdoor unit for details). 5.2.1 COUPLER HEAT INSULATION No gaps Coupler heat insulation (Accessory) Be sure to overlap the insulation. Indoor unit side • If pipes are shaped by hand, be careful not to collapse them. • Do not bend the pipes at an angle more than 90°. • When pipes are repeatedly bend or stretched, the material will harden, making it difficult to bend or stretch them any more. • Do not bend or stretch the pipes more than 3 times. Cable ties (large) (Accessory) CAUTION Pipes CAUTION To prevent breaking of the pipe, avoid sharp bends. If the pipe is bent repeatedly at the same place, it will break. (Gas and liquid pipes) There should be no gaps between the insulation and the product. CAUTION 5.1.3. Pipe connection CAUTION Be sure to connect the pipe against the port on the indoor unit and the outdoor unit correctly. If the centering is improper, the flare nut cannot tightened smoothly. If the flare nut is forced to turn, the threads will be damaged. Do not remove the flare nut from the indoor unit pipe until immediately before connecting the connection pipe. Do not use mineral oil on flared part. Prevent mineral oil from getting into the system as this would reduce the lifetime of the units. (1) Detach the caps and plugs from the pipes. (2) Center the pipe against the port on the indoor unit, and then turn the flare nut by hand. Connection pipe (Gas) Connection pipe (Liquid) After connecting the piping, check the all joints for gas leakage with gas leak detector. When inspecting gas leakage, always use the vacuum pump for pressure. Do not use nitrogen gas. Install heat insulation around both the large (gas) and small (liquid) pipes. Failure to do so may cause water leaks. 6. ELECTRICAL WIRING WARNING Electrical work must be performed in accordance with this Manual by a person certified under the national or regional regulations. Be sure to use a dedicated circuit for the unit. An insufficient power supply circuit or improperly performed electrical work can cause serious accidents such as electric shock or fire. Before starting work, check that power is not being supplied to the indoor unit and outdoor unit. Use the included connection cables and power cables or ones specified by the manufacturer. Improper connections, insufficient insulation, or exceeding the allowable current can cause electric shock or fire. (3) When the flare nut is tightened properly by your hand, hold the body side coupling with a separate spanner, then tighten with a torque wrench. (Refer to the following table for the flare nut tightening torques.) CAUTION Hold the torque wrench at its grip, keeping it in the right angle with the pipe, in order to tighten the flare nut correctly. Tighten the flare nuts with a torque wrench using the specified tightening method. Otherwise, the flare nuts could break after a prolonged period, causing refrigerant to leak and generate a hazardous gas if the refrigerant comes into contact with a flame. Tighten with 2 wrenches. Holding wrench Torque wrench Indoor unit pipe (Body side) Flare nut For wiring, use the prescribed type of cables, connect them securely, making sure that there are no external forces of the cables applied to the terminal connections. Improperly connected or secured cables can cause serious accidents such as overheating the terminals, electric shock, or fire. Do not modify the power cables, use extension cables, or use any branches in the wiring. Improper connections, insufficient insulation, or exceeding the allowable current can cause electric shock or fire. Match the terminal board numbers and connection cable colors with those of the outdoor unit. Erroneous wiring may cause burning of the electric parts. Securely connect the connection cables to the terminal board. In addition, secure the cables with wiring holders. Improper connections, either in the wiring or at the ends of the wiring, can cause a malfunction, electric shock, or fire. Always fasten the outside covering of the connection cable with the cable clamp. (If the insulator is chafed, electric leakage may occur.) Securely install the electrical box cover on the unit. An improperly installed electrical box cover can cause serious accidents such as electric shock or fire through exposure to dust or water. Install sleeves into any holes made in the walls for wiring. Otherwise, a short circuit could result. Install a earth (ground) leakage breaker. In addition, install the earth (ground) leakage breaker so that the entire AC main power supply is cut off at the same time. Otherwise, electric shock or fire could result. Always connect the earth (ground) cable. Improper earthing (grounding) work can cause electric shocks. Connection pipe Install the remote controller cables so as not to be touched directly with your hand. Perform wiring work in accordance with standards so that the air conditioner can be operated safely and positively. Unit shall be earthed (grounded) in compliance with the applicable local and national codes. En-6 9381798025-03_IM_EN.indd 6 9/29/2560 BE 16:37 CAUTION WARNING If the indoor unit connection cable and power supply are wired incorrectly, the air conditioner may be damaged or cause malfunction. Ground the unit. Do not connect the earth (ground) cable to a gas pipe, water pipe, lightning rod, or a telephone earth (ground) cable. Improper earthing (grounding) may cause electric shock. Use ring terminals and tighten the terminal screws to the specified torques, otherwise, it may cause abnormal overheating and possibly cause serious damage inside the unit. Tightening torque [N·m (kgf·cm)] M4 screw 1.2 to 1.8 (12 to 18) Screw with special washer Do not connect power supply cables to the transmission or remote controller terminals, as this will damage the product. Never bundle the power supply cable and transmission cable together. Bundling these cables together will cause miss operation. When handling PCB, static electricity charged in the body may cause malfunction of the PCB. Follow the cautions below: • Establish a ground for the indoor and outdoor units and peripheral devices. • Cut power (breaker) off. • Touch metal part of the indoor and outdoor units for more than 10 seconds to discharge static electricity charged in the body. • Do not touch terminals of parts and patterns implemented on PCB. Be careful not to generate a spark as follows for using a flammable refrigerant. • Do not remove the fuse while power is on. • Do not disconnect plug from the wall outlet and the wiring while the power is on. • It is recommended to position the outlet connection in a high position. Place the cords so that they do not get tangled. Wire Screw with special washer Ring terminal Wire Ring terminal Terminal blocks Remote controller cable For 2 -wire type For 3-wire type 30 mm 30 mm 6.1.3. Wiring procedure 6. 1. Wiring method Connection cable 6.1.1. Connection diagrams Control line Connection cable to outdoor unit Earth (ground) line Power line Power line Connection cable Control line Outdoor unit Remote controller cable Wired remote controller cable 3-wire type DIP switch 2-wire type Red White Black or Earth (ground) Control box Red White Print circuit board (PCB) 3-wire type 2-wire type 6.1.2. Connection cable preparation Power supply cable or connection cable Keep the earth (ground) wire longer than the other wires. 30 mm Earth (ground) wire 40 mm or re mo Power supply cable or connection cable Black White White Red • Use a 4-core wire cable. Red How to connect wiring to the terminals. (1) Use ring terminals with insulating sleeves as shown in the following figure to connect to the terminal block. (2) Securely crimp the ring terminals to the wires using an appropriate tool so that the wires do not come loose. ip Str 10 mm Remote controller Remote controller cable Remote controller Remote controller cable Ring terminal Factory setting Set to “3 WIRE” Connecting the Optional parts “2 WIRE” Sleeve (3) Use the specified wires, connect them securely, and fasten them so that there is no stress placed on the terminals. (4) Use an appropriate screwdriver to tighten the terminal screws. Do not use a screwdriver that is too small, otherwise, the screw heads may be damaged and prevent the screws from being properly tightened. (5) Do not tighten the terminal screws too much, otherwise, the screws may break. (6) Refer to the following table for the terminal screw tightening torques. *Earth (Ground) the remote controller if it has a earth (ground) wire. CAUTION Tighten the indoor unit connection wire and power supply indoor and outdoor unit, terminal board connections firmly with the terminal board screws. Faulty connection may cause a fire. Connect the indoor unit connection wire by matching the numbers of the outdoor and indoor units terminal board numbers as shown in terminal label. Be sure to refer to the connection diagram for the correct field wiring. Wrong wiring causes malfunction of the unit. En-7 9381798025-03_IM_EN.indd 7 9/29/2560 BE 16:37 6.1.4. Connection wiring (4) Replace the Control box cover and Wiring cover. Securely tighten the screws. CAUTION Be careful not to mistake the power supply cable and connection wires when installing. Install so that the wires for the remote controller will not come in contact with other connection wires. (1) Remove the control box cover and wiring cover by loosening the screws. Wiring connecting port Wiring cover Control box cover Cure the wiring connecting port and remote controller connecting port with paste or heat insulation so that insects or dust will not enter the unit CAUTION Do not bundle the remote controller cable, or wire the remote controller cable in parallel, with the indoor unit connection wire (to the outdoor unit) and the power supply cable. It may cause erroneous operation. 7. CASSETTE GRILLE INSTALLATION • Install according to the installation manual for Cassette grille. • Be sure to confirm there is no gap between the panel and main unit after installing the Cassette grille. 8. REMOTE CONTROLLER INSTALLATION (2) Thread each cable through the holes or indents of the cabinet and connect the wires. (3) After wiring is complete, secure the cables with the cable clamps. • Install according to the installation manual for Remote controller. 9. FUNCTION SETTING Cable clamp Power supply cable or connection cable 9. 1. Turning on the power CAUTION Recheck the wiring. Incorrect wiring will cause trouble. When initially starting up this unit, the following setting screen will be displayed. Settings configured at this stage can be changed afterwards. 2 3 9. 2. Setting method 1 See installation manual of remote controller. 9. 3. RC Sensor setting Detail (a) The detection location of the room temperature can be selected from the following two examples. Choose the detection location that is best for the installation location. A. Indoor unit setting (factory setting) Cable tie (small) (Accessory) A Y1 The room temperature is detected by the indoor unit temperature sensor. Indoor unit Y2 Y3 1 2 B. Remote controller setting Remote controller cable The room temperature is detected by the remote controller temperature sensor. B Indoor unit Detail (b) En-8 9381798025-03_IM_EN.indd 8 9/29/2560 BE 16:37 Auto restart CAUTION When selecting the “Remote controller setting”, if the detected temperature value between the temperature sensor of the indoor unit and the temperature sensor of the remote controller varies significantly, it is likely to return to the control status of temperature sensor of the indoor unit temporarily. As the temperature sensor of remote controller detects the temperature near the wall, when there is a certain difference between the room temperature and the wall temperature, the sensor will not detect the room temperature correctly sometimes. Especially when the outer side of the wall on which the sensor is positioned is exposed to the open air, it is recommended to use the temperature sensor of the indoor unit to detect the room temperature when the indoor and outdoor temperature difference is significant. The temperature sensor of the remote controller is not only used when there is a problem in the detection of the temperature sensor of the indoor unit. Filter sign Select appropriate intervals for displaying the filter sign on the indoor unit according to the estimated amount of dust in the air of the room. If the indication is not required, select "No indication" (03). (♦... Factory setting) Setting value 11 (♦... Factory setting) Function number 40 Setting value Setting description 00 Enable 01 Disable * Auto restart is an emergency function such as for power outage etc. Do not attempt to use this function in normal operation. Be sure to operate the unit by remote controller or external device. Room temperature sensor switching Standard (2500 hours) 01 Long interval (4400 hours) 02 Short interval (1250 hours) 03 No indication 42 Setting value Setting description 00 Indoor unit 01 Both Remote controller custom code ♦ (Only for wireless remote controller) The indoor unit custom code can be changed. Select the appropriate custom code. (♦... Factory setting) Function number Select the appropriate ceiling height according to the place of installation. (♦... Factory setting) Setting value 20 Setting description 00 Standard (3.0 m : 18/25 type) (3.2 m : 40/50 type) 01 High ceiling (3.5 m : 18/25 type) (4.2 m : 40/50 type) 02 ♦ 44 Function number Select the appropriate number of outlet directions according to the installation conditions. (♦... Factory setting) 22 ♦ Room temperature control for cooling Depending on the installed environment, correction of the room temperature sensor may be required. Select the appropriate control setting according to the installed environment. (♦... Factory setting) Function number Setting value 30 Standard 01 Lower control 02 Slightly higher control ♦ 31 02 C 03 D ♦ Setting value Setting description 00 Operation/Stop mode 1 01 (Setting prohibited) 02 Forced stop mode 03 Operation/Stop mode 2 ♦ Function number 48 Setting value Setting description 00 Both 01 Wired remote controller ♦ Switching functions for external output terminal Functions of the external output terminal can be switched. (♦... Factory setting) Function number Higher control Depending on the installed environment, correction of the room temperature sensor may be required. Select the appropriate control setting according to the installed environment. (♦... Factory setting) Setting value B To use the temperature sensor on the wired remote controller only, change the setting to "Wired remote controller" (01). This function will only work if the function setting 42 is set at "Both" (01) (♦... Factory setting) Room temperature control for heating Function number A 01 Room temperature sensor switching (Aux.) Setting description 00 03 46 Setting description 4-way 3-way Setting description 00 "Operation/Stop" mode or "Forced stop" mode can be selected. (♦... Factory setting) Low ceiling (2.7 m) Outlet directions Setting value 00 01 Setting value External input control The ceiling height values are for the 4-way outlet. Do not change this setting in the 3-way outlet mode. Function number ♦ 00: Sensor on the indoor unit is active. 01: Sensors on both indoor unit and wired remote controller are active. * Remote controller sensor must be turned on by using the remote controller Setting description 00 Function number Ceiling height Function number ♦ (Only for wireless remote controller) When using the Wired remote controller temperature sensor, change the setting to "Both" (01). (♦... Factory setting) 9. 4. Function Details Function number Enable or disable automatic restart after a power interruption. 60 Setting value Setting description 00 Operation status 09 Error status 10 Indoor unit fan operation status 11 External heater ♦ Setting description 00 Standard 01 Lower control 02 Slightly lower control 03 Higher control ♦ En-9 9381798025-03_IM_EN.indd 9 9/29/2560 BE 16:37 Setting record Remote controller address • Record any changes to the settings in the following table. Function number Setting 11 Filter sign 20 Ceiling height 22 Outlet directions 30 31 Setting Value Room temperature control for indoor unit sensor 40 Auto restart 42 Room temperature sensor switching 44 Remote controller custom code 46 External input control 48 Room temperature sensor switching (Aux.) 60 Switching function for external outlet terminal Cooling Heating (1) 3-wire type DIP switch (RC AD SW)...Factory setting “00” When connecting multiple indoor units to 1 standard wired remote controller, set the address at RC AD SW in sequence from “00”. (2) 2-wire type DIP switch (RC AD SW)...Factory setting “00” Since the remote controller address settings are automatically configured, you do not need to configure them. If configuring manually, it is necessary to configure both the indoor unit and the remote controller. For details, please refer to the remote controller manual. Setting Setting range Remote controller address After completing the function setting, be sure to turn off the power and turn it on again. Example 1 2 3 4 RC AD If 4 indoor units are connected. Indoor unit RC AD SW 00 CAUTION ON Setting example 00 00 to 15 Indoor unit 10. SPECIAL INSTALLATION METHODS Type of switch Indoor unit RC AD SW 01 Indoor unit RC AD SW 02 RC AD SW 03 Be sure to turn off the electrical breaker before making settings. Do not set the DIP switch or rotary switch of this unit except as specified in this manual or the operating manual supplied with the air conditioner. Setting the switches other than specified will cause an accident or trouble. Remote controller Do not touch the circuit board and circuit board parts directly with your hands. Otherwise, injury or electric shock could result. Set the R.C. address in accordance with the following table. Use an insulated screwdriver to set the dip switches. Indoor unit 10. 1. Setting the address R.C. address 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 DIP SWITCH No. 1 OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 2 OFF OFF ON ON OFF OFF ON ON OFF OFF ON ON OFF OFF ON ON 3 OFF OFF OFF OFF ON ON ON ON OFF OFF OFF OFF ON ON ON ON 4 OFF OFF OFF OFF OFF OFF OFF OFF ON ON ON ON ON ON ON ON Note: Be sure to set consecutive R.C. address. The indoor units cannot be operated if a number is skipped. 1 2 3 10. 2. Setting the DIP switch See installation manual of remote controller. Y1 Y2 Y3 10. 3. Group control 1 2 CAUTION Group control is only possible between units with remote controllers of the same type. To confirm the type of remote controller, see the back of the remote controller or “2.3. Optional parts”. ON 1 2 3 4 With a single remote controller, up to 16 units can be simultaneously operated. RC AD I.U. A I.U. B C I.U. D I.U. E Master A, B, C, D, E : Remote controller cable. (Refer to 3.3. Electrical requirement.) A+B+C+D+E ≤ 500 m. En-10 9381798025-03_IM_EN.indd 10 9/29/2560 BE 16:37 Operation behavior 11. OPTION AND OTHER CONNECTABLE DEVICES ● Input signal type ON WARNING Regulation of cable differs from each locality, refer in accordance with local rules. OFF Edge ● When function setting is “Operation/Stop” mode 1. Input signal 1 2 3 Command OFF → ON Operation ON → OFF Stop Y1 ● When function setting is “Forced stop” mode. Y2 Y3 Input signal Command 1 2 Terminal (External in) CN48 CN65 CN47 (IR receiver) (External in/out PCB) (External out) 11. 1. Optional parts OFF → ON Forced stop ON → OFF Normal * When the forced stop is triggered, indoor unit stops and Operation/Stop operation by a remote controller is restricted. ● When function setting is "Operation/Stop" mode 2. Input signal This air conditioner can be connected with the following optional kits. For details on how to install optional parts, refer to the installation manual included in each item. Option type Connector No. UTY-LBT*C* (IR Receiver) CN48 UTY-XWZXZG (Connect wire) CN47*1 UTY-XCSX (External input and output PCB) CN65*2 *1: For external output terminal setting, refer to Function No.60 in "9. FUNCTION SETTING". *2: Various settings are available by using the optional External input and output PCB. 11. 2. External input and output Command OFF → ON Operation ON → OFF Stop (R.C. disabled) 11.2.2. External output • A twisted pair cable (22AWG) should be used. Maximum length of cable is 25 m (82 ft.). • Use an external input and output cable with appropriate external dimension, depending on the number of cables to be installed. • Output voltage: Hi DC12V±2V, Lo 0V. • Permissible current: 50mA Output select ● When interlocking with external device 11.2.1. External input • Indoor unit functions such as Operation/Stop or Forced stop can be done by using indoor unit terminals. • “Operation/Stop” mode or “Forced stop” mode can be selected with function setting of indoor unit. • A twisted pair cable (22 AWG) should be used. Maximum length of cable is 150 m (492 ft.). • Use an external input and output cable with appropriate external dimension, depending on the number of cables to be installed. • The wire connection should be separate from the power cable line. Terminal PCB Connected device CN47 Relay (locally purchased) or ● When displaying "Operation/Stop" PCB Resistor CN47 LED Connected device Operation behavior *If function setting "60" is set to "00" Function setting Connected device ● Dry contact terminal 00 When a power supply is unnecessary at the input device you want to connect, use the Dry contact terminal. PCB 09 *1 Terminal (External in) 60 10 Connected device 11 *1: The switch can be used on the following condition: DC 12 V to 24 V, 1 mA to 15 mA. Status Stop Output voltage 0V Operation Normal DC 12 V 0V Error DC 12 V Indoor unit fan stop Indoor unit fan operation 0V DC 12 V External heater OFF 0V External heater ON DC 12V 11.2.3. Connection methods Wire modification • Remove insulation from wire attached to wire kit connector. • Remove insulation from locally purchased cable. Use crimp type insulated butt connector to join field cable and wire kit wire. • Connect the wire with connecting wire with solder. IMPORTANT: Be sure to insulate the connection between the wires. Locally purchased Option parts External output wire Solder and insulate the connected parts. En-11 9381798025-03_IM_EN.indd 11 9/29/2560 BE 16:37 • Connecting wires to the terminals. Use ring terminals with insulating sleeves to connect to the terminal block. • Connection terminals and wiring arrangement In following figure, all the possible connections are done for description. In actual installation, connections will differ according to each installation requirements. By the wired remote controller • For the operation method, refer to the installation manual and the operating manual of the wired remote controller. The Operation indicator lamp and Timer indicator lamp will simultaneously flash during the test run mode. Heating test run will begin in a few minutes when HEAT is selected by the remote controller [reverse cycle model only]. 14. CUSTOMER GUIDANCE PCB 1 2 3 Explain the following to the customer in accordance with the operating manual: (1) Starting and stopping method, operation switching, temperature adjustment, timer, air flow switching, and other remote controller unit operations. (2) Cleaning and maintenance of the product, and other items such as air filters and air louvers if applicable. (3) Give the operating and installation manuals to the customer. (4) If the signal code is changed, explain to the customer how it changed (the system returns to signal code A when the batteries in the remote controller unit are replaced). *(4) is applicable to using wireless remote controller. External input/output PCB communication wire External output wire Clamp 15. ERROR CODES If you use a wired type remote controller, error codes will appear on the remote controller display. For more information, refer to the installation manual of the remote controller. If you use a wireless remote controller, the lamps on the IR receiver unit will output error codes by way of blinking patterns. Refer to the lamp blinking patterns and error codes in the following tables. An error display is displayed only during operation. Clamp Error display Y1 Y2 Y3 1 Wired remote TIMER ECONOMY OPERATION controller lamp lamp lamp (green) Error code (orange) (green) Description 2 External input wire (1) (1) Serial communication error (1) (2) Wired remote controller communication error (1) (5) Check run unfinished (1) (6) Peripheral unit transmission PCB connection error (1) (8) External communication error (2) (1) (2) (2) Indoor unit capacity error (2) (3) Combination error 12. CHECK LIST Pay special attention to the following check items when installing the indoor unit(s). After installation is complete, be sure to check the following check items again. CHECK ITEMS If not performed correctly Has the indoor unit been installed correctly? Vibration, noise, indoor unit may drop Has there been a check for gas leaks (refrigerant pipes)? No cooling, No heating Has heat insulation work been completed? Water leakage Does water drain easily from the indoor units? Water leakage Are the wires and pipes all connected completely? No operation, heat or burn damage CHECK BOX Unit number or Refrigerant circuit address setting error [Simultaneous Multi] • Connection unit number error (indoor secondary unit) [Simultaneous Multi] • Connection unit number error (indoor unit or branch unit) [Flexible Multi] (2) (4) (2) (6) Indoor unit address setting error (2) (7) Primary unit, secondary unit setup error [Simultaneous Multi] (2) (9) Connection unit number error in wired remote controller system (3) (1) Power supply interruption error (3) (2) Indoor unit PCB model information error (3) (5) Manual auto switch error (3) (9) Indoor unit power supply error for fan motor (3) (10) Indoor unit communication circuit (wired remote controller) error (4) (1) Room temp. sensor error By the wireless remote controller (with “TEST RUN” button) • To start test run, press the “START/STOP” button and the “TEST RUN” button on the remote controller. • To end test run, press the remote controller “START/STOP” button. (4) (2) Indoor unit Heat Ex. Middle temp. sensor error (4) (4) Human sensor error By the indoor unit or IR receiver unit • To start test run, press the “MANUAL AUTO” button of the unit for more than 10 seconds (forced cooling). • To end test run, press the “MANUAL AUTO” button for more than 3 seconds or press the remote controller “START/STOP” button. (5) (1) Indoor unit fan motor error (5) (3) Drain pump error Is the connection cable the specified No operation, heat or burn damthickness? age Are the inlets and outlets free of any No cooling, No heating obstacles? After installation is completed, has the proper operation and handling been explained to the user? 13. TEST RUN Check items (1) Is operation of each button on the remote control unit normal? (2) Does each lamp light normally? (3) Do airflow direction louvers operate normally? (4) Is the drain normal? (5) Do not have an abnormal noise and vibration during operation? Do not operate the air conditioner in test run for a long time. [Operation method] Depending on your installation, choose from the following: En-12 9381798025-03_IM_EN.indd 12 9/29/2560 BE 16:37 Error display Wired remote TIMER ECONOMY OPERATION controller lamp lamp lamp (green) Error code (orange) (green) Description (5) (7) Damper error (5) (15) Indoor unit error (6) (1) Outdoor unit reverse/missing phase and wiring error (6) (2) Outdoor unit main PCB model information error or communication error (6) (3) Inverter error (6) (4) Active filter error, PFC circuit error (6) (5) Trip terminal L error (6) (8) Outdoor unit rush current limiting resister temp. rise error (6) (10) Display PCB microcomputers communication error (7) (1) Discharge temp. sensor error (7) (2) Compressor temp. sensor error (7) (3) Outdoor unit Heat Ex. liquid temp. sensor error (7) (4) Outdoor temp. sensor error (7) (5) Suction Gas temp. sensor error (7) (6) • 2-way valve temp. sensor error • 3-way valve temp. sensor error (7) (7) Heat sink temp. sensor error • Sub-cool Heat Ex. gas inlet temp. sensor error • Sub-cool Heat Ex. gas outlet temp. sensor error (8) (2) (8) (3) Liquid pipe temp. sensor error (8) (4) Current sensor error (8) (6) (9) (4) Trip detection (9) (5) Compressor rotor position detection error (permanent stop) (9) (7) Outdoor unit fan motor 1 error (9) (8) Outdoor unit fan motor 2 error (9) (9) 4-way valve error (9) (10) Coil (expansion valve) error (10) (1) Discharge temp. error (10) (3) Compressor temp. error (10) (4) High pressure error (10) (5) Low pressure error (13) (2) Branch boxes error [Flexible Multi] Display mode • Discharge pressure sensor error • Suction pressure sensor error • High pressure switch error : 0.5s ON / 0.5s OFF : 0.1s ON / 0.1s OFF ( ) : Number of flashing En-13 9381798025-03_IM_EN.indd 13 9/29/2560 BE 16:37
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