FILE NO.
FILE NO. SVM-07008 CONTENTS 1. SAFETY PRECAUTIONS .......................................................................... 2 2. SPECIFICATIONS ..................................................................................... 4 3. REFRIGERANT R410A ............................................................................. 6 4. CONSTRUCTION VIEWS ........................................................................ 14 5. WIRING DIAGRAM .............................................................
FILE NO. SVM-07008 1. SAFETY PRECAUTIONS For general public use Power supply cord of outdoor unit shall be more than 1.5 mm2 (H07RN-F or 60245IEC66) polychloroprene sheathed flexible cord. • • • • Read this “SAFETY PRECAUTIONS” carefully before servicing. The precautions described below include the important items regarding safety. Observe them without fail. After the servicing work, perform a trial operation to check for any problem.
FILE NO. SVM-07008 • DO NOT INSTALL NEAR CONCENTRATIONS OF COMBUSTIBLE GAS OR GAS VAPORS. FAILURE TO FOLLOW THIS INSTRUCTION CAN RESULT IN FIRE OR EXPLOSION. • TO PREVENT THE INDOOR UNIT FROM OVERHEATING AND CAUSING A FIRE HAZARD, PLACE THE UNIT WELL AWAY (MORE THAN 2 M) FROM HEAT SOURCES SUCH AS RADIATORS, HEAT REGISTORS, FURNACE, STOVES, ETC.
FILE NO. SVM-07008 2. SPECIFICATIONS 2-1. Specifications Unit model Indoor RAS-10SKV-E, RAS-10SKV-A Outdoor RAS-10SAV-E, RAS-10SAV-A Cooling capacity (kW) 2.5 Cooling capacity range (kW) 1.1 - 3.0 Heating capacity (kW) 3.2 Heating capacity range (kW) 0.9 - 4.1 Power supply Electric 1Ph/50Hz/220-240V Indoor characteristic Operation mode Running current Outdoor (A) noise (W) 30 30 (%) 87 87 Cooling Heating (A) 3.44 - 3.16 3.96- 3.
FILE NO. SVM-07008 2-2. Operation Characteristic Curve 6 6 5 5 4 4 Current (A) Current (A) 3 2 3 2 Conditions Conditions Indoor : DB 27oC/WB 19oC 1 Indoor : DB 20oC 1 Outdoor : DB 35oC Air Flow : High Pip Length : 5m Voltage : 230V 0 Outdoor : DB 7oC/WB 6oC Air Flow : High Pip Length : 5m Voltage : 230V 0 0 10 20 30 40 50 60 70 80 90 100 110 120 0 10 20 30 Compressor Speed (rps) 40 50 60 70 80 90 100 110 120 Compressor Speed (rps) 2-3.
FILE NO. SVM-07008 3. REFRIGERANT R410A This air conditioner adopts the new refrigerant HFC (R410A) which does not damage the ozone layer. The working pressure of the new refrigerant R410A is 1.6 times higher than conventional refrigerant (R22).
FILE NO. SVM-07008 Table 3-2-1 Thicknesses of annealed copper pipes Thickness (mm) Nominal diameter Outer diameter (mm) R410A R22 1/4 6.35 0.80 0.80 3/8 9.52 0.80 0.80 1/2 12.70 0.80 0.80 5/8 15.88 1.00 1.00 2. Joints For copper pipes, flare joints or socket joints are used. Prior to use, be sure to remove all contaminants. a) Flare Joints Flare joints used to connect the copper pipes cannot be used for pipings whose outer diameter exceeds 20 mm.
FILE NO. SVM-07008 d) Flare Processing Make certain that a clamp bar and copper pipe have been cleaned. By means of the clamp bar, perform the flare processing correctly. Use either a flare tool for R410A or conventional flare tool. Flare processing dimensions differ according to the type of flare tool. When using a conventional flare tool, be sure to secure “dimension A” by using a gauge for size adjustment. ØD A Fig.
FILE NO. SVM-07008 Table 3-2-6 Flare and flare nut dimensions for R22 Dimension (mm) Nominal diameter Outer diameter (mm) Thickness (mm) A B C D Flare nut width (mm) 1/4 6.35 0.8 9.0 9.2 6.5 13 17 3/8 9.52 0.8 13.0 13.5 9.7 20 22 1/2 12.70 0.8 16.2 16.0 12.9 20 24 5/8 15.88 1.0 19.7 19.0 16.0 23 27 3/4 19.05 1.0 23.3 24.0 19.2 34 36 45˚ 6˚ to 4 B A C 43˚ D to 4 5˚ Fig. 3-2-2 Relations between flare nut and flare seal surface 2.
FILE NO. SVM-07008 3-3. Tools 3-3-1. Required Tools The service port diameter of packed valve of the outdoor unit in the air-water heat pump using R410A is changed to prevent mixing of other refrigerant. To reinforce the pressure-resisting strength, flare processing dimensions and opposite side dimension of flare nut (For Ø12.7 copper pipe) of the refrigerant piping are lengthened.
FILE NO. SVM-07008 3-4. Recharging of Refrigerant When it is necessary to recharge refrigerant, charge the specified amount of new refrigerant according to the following steps. Recover the refrigerant, and check no refrigerant remains in the equipment. When the compound gauge’s pointer has indicated –0.1 Mpa (–76 cmHg), place the handle Low in the fully closed position, and turn off the vacuum pump’s power switch. Connect the charge hose to packed valve service port at the outdoor unit’s gas side.
FILE NO. SVM-07008 1. Be sure to make setting so that liquid can be charged. 2. When using a cylinder equipped with a siphon, liquid can be charged without turning it upside down. It is necessary for charging refrigerant under condition of liquid because R410A is mixed type of refrigerant. Accordingly, when charging refrigerant from the refrigerant cylinder to the equipment, charge it turning the cylinder upside down if cylinder is not equipped with siphon.
FILE NO. SVM-07008 2. Characteristics required for flux • Activated temperature of flux coincides with the brazing temperature. • Due to a wide effective temperature range, flux is hard to carbonize. • It is easy to remove slag after brazing. • The corrosive action to the treated metal and brazing filler is minimum. • It excels in coating performance and is harmless to the human body.
FILE NO. SVM-07008 4. CONSTRUCTION VIEWS 4-1. Indoor Unit Front panel Air filter Air inlet Heat exchanger 195 58 Air outlet Knock out system 8 8 60 52 250 740 50 50 Knock out system 60 55 55 60 105 135 500 Connecting pipe (0.37m) (Flare 6.35) 290 Drain hose (0.5m) Hanger Connecting pipe (0.37m) (Flare 9.
FILE NO. SVM-07008 4-2.
FILE NO. SVM-07008 5. WIRING DIAGRAM 5-1.
5-2. Outdoor Unit FILE NO.
FILE NO. SVM-07008 6. SPECIFICATION OF ELECTRICAL PARTS 6-1. Indoor Unit No. Parts name 1 Fan motor (for indoor) 2 Thermo.
FILE NO. SVM-07008 6-2. Outdoor Unit (RAS-10SAV-E, RAS-10SAV-A) No. 1 Parts name Model name Rating SC coil L01 GET-0451 0.6mH, 15A (Noise filter) L03 GET-0452 2.0 mH, 10A 2 DC-DC transformer SWT-72 3 Reactor 4 Outside fan motor SKF-240-20B-1 5 Fan control relay G5NB-1A 6 Outside air temp. sensor (TO sensor) (Inverter attached) 10kΩ (25°C) 7 Heat exchanger temp. sensor (TE sensor) (Inverter attached) 10kΩ (25°C) 8 Dischenge temp.
FILE NO. SVM-07008 7. REFRIGERANT CYCLE DIAGRAM 7-1. Refrigerant Cycle Diagram RAS-10SKV-E / RAS-10SAV-E RAS-10SKV-A / RAS-10SAV-A INDOOR UNIT T1 Temp. measurement Indoor heat exchanger P Pressure measurement Gauge attaching port Vacuum pump connecting port TA Deoxidized copper pipe Outer dia. : 6.35mm Thickness : 0.8mm Sectional shape of heat insulator Deoxidized copper pipe Outer dia. : 9.52mm Thickness : 0.8mm Allowable pipe length Cross flow fan Allowable height difference : 10m TC Max.
FILE NO. SVM-07008 7-2. Operation Data Tempeature Model name condition(°C) RASIndoor Outdoor 27/19 35/10SKV-E 10SKV-A Standard pressure P (MPa) Heat exchanger pipe temp. T1 (°C) T2 (°C) 0.9 to 1.1 9 to 11 Standard pressure P (MPa) Heat exchanger pipe temp.
FILE NO. SVM-07008 8. CONTROL BLOCK DIAGRAM 8-1. Indoor Unit Indoor Unit Control Panel M.C.U Heat Exchanger Sensor Temperature Sensor Infrared Rays Signal Receiver Infrared Rays 36.
– 23 – Heat Exchanger temp. sensor Outdoor air temp. sensor Discharge temp. sensor signal 1 230V 50Hz For INDOOR UNIT Noise filter Converter (AC DC) 1. PWM synthesis function 2. Input current release control 3. IGBT over-current detect control 4. Outdoor fan control 5. High power factor correction control 6.Signal communication to indoor unit M. C. U M. C. U High power factor correction circuit Input current sensor P.C.
FILE NO. SVM-07008 9.
FILE NO. SVM-07008 9-2. Operation Description 1. Basic operation ........................................................................................................... 26 1. Operation control ................................................................................................... 26 2. Cooling/Heating operation ..................................................................................... 27 3. AUTO operation ............................................................................
FILE NO. SVM-07008 9-2. Operation Description Item Operation flow and applicable data, etc. 1. Basic operation Description 1. Operation control Receiving the user’s operation condition setup, the operation statuses of indoor/outdoor units are controlled. 1) The operation conditions are selected by the remote controller as shown in the below. 2) A signal is sent by ON button of the remote controller.
FILE NO. SVM-07008 Item 1. Basic operation Operation flow and applicable data, etc. Description 2. Cooling/Heating operation The operations are performed in the following parts by controls according to cooling/heating conditions. 1) Receiving the operation ON signal of the remote controller, the cooling or heating operation signal starts being transferred form the indoor controller to the outdoor unit. 2) At the indoor unit side, the indoor fan is operated according to the contents of “2.
FILE NO. SVM-07008 Item Operation flow and applicable data, etc. 2. Indoor fan motor control (This operation controls the fan speed at indoor unit side.) The indoor fan (cross flow fan) is operated by the phasecontrol induction motor. The fan rotates in 5 stages in MANUAL mode, and in 5 stages in AUTO mode, respectively. (Table 1) COOL ON Fan speed setup MANUAL (Fig. 1) Fan speed Indication AUTO L W6 L+ (L + M) / 2 M W9 M+ (M + H) / 2 H WC (Fig.
FILE NO. SVM-07008 Item Operation flow and applicable data, etc. 2. Indoor fan motor control Description 1) When setting the fan speed to L, L+, M, M+ or H on the remote controller, the operation is performed with the constant speed shown in Fig. 3 and Table 1. 2) When setting the fan speed to AUTO on the remote controller, revolution of the fan motor is controlled to the fan speed level shown in Fig. 5 according to the set temperature and room temperature.
FILE NO. SVM-07008 Item 3. Capacity control Operation flow and applicable data, etc. Description The cooling or heating capacity depending on the load is adjusted. According to difference between the setup value of temperature and the room temperature, the capacity is adjusted by the compressor revolution. 1) The difference between set temperature on remote controller (Ts) and room temperature (Ta) is calculated.
FILE NO. SVM-07008 Item Operation flow and applicable data, etc. Indoor heat exchanger temperature 5. Release protective control by tempera- (Prevent-freezing control for indoor heat exchanger) ture of indoor heat In cooling/dry operation, the sensor of indoor heat exchanger exchanger detects evaporation temperature and controls the compressor speed so that temperature of the heat exchanger does not exceed the specified value.
FILE NO. SVM-07008 Item Operation flow and applicable data, etc. 6. Defrost control (This function removes frost adhered to the outdoor (Only in heating heat exchanger.) operation) The temperature sensor of the outdoor heat exchanger (Te sensor) judges the frosting status of the outdoor heat exchanger and the defrost operation is performed with 4-way valve reverse defrost system.
FILE NO. SVM-07008 Item Operation flow and applicable data, etc. Description 7. Louver control This function controls the air direction of the indoor unit. 1) Louver • The position is automatically controlled according to the operation position mode (COOL/HEAT). • The set louver position is stored in memory by the microcomputer, and the louver returns to the stored position when the next operation is performed.
FILE NO. SVM-07008 Item 8. ECO operation Operation flow and applicable data, etc. Description When pressing [ECO] button on the remote controller, a Economic operation is performed. This function operates the air conditioner with the difference between the set and the room temperature as shown in the following figure. 12 11 10 9 8 7 6 5 4 3 2 +6.5 +6.0 +5.5 +5.0 +4.5 +4.0 +3.5 +3.0 +2.5 +2.0 +1.5 +1.0 1 +0.5 Dry Max *12 *11 *10 *9 *8 Min Hz TSC -0.5 -1.
FILE NO. SVM-07008 Item Operation flow and applicable data, etc. 9. Temporary operation Pressing [RESET] button starts the temporary operation of [AUTO] operation. When keeping [RESET] button pressed for 10 seconds or more, the temporary [COOL] operation is performed. YES Filter lamp ON Press RESET button.
FILE NO. SVM-07008 Item Description Operation flow and applicable data, etc. 11. Self-Cleaning function Unit now performing cooling or dry operation Press “STOP” button Only timer indicator lights, and Self Cleaning operation starts 1. Purpose The Self-Cleaning operation is to minimize the growth of mold, bacteria etc. by running the fan and drying so as to keep the inside of the air conditioner clean.
FILE NO. SVM-07008 Item Operation flow and applicable data, etc. Description • Self-Cleaning diagram 11. Self-Cleaning function Operation display ON OFF OFF FCU fan ON rpm is depend on presetting. ON (500RPM) OFF FCU louver OPEN OPEN (12.7º) CLOSE Timer display ON or OFF depend on presetting of timer function. ON ON or OFF depend on presetting of timer function. Compressor ON or OFF depend on presetting per room temperature.
FILE NO. SVM-07008 Item 13. Romote-A or B selection Operation flow and applicable data, etc. Setting the remote controller To separate using of remote control for each indoor unit in case of 2 air conditioner are installed nearly. Remote Control B Setup. 1) Press RESET button on the indoor unit to turn the air conditioner ON. 2) Point the remote control at the indoor unit. 3) Push and hold CHK • button on the Remote Control by thetip of the pencil. "00" will be shown shown on the display.
FILE NO. SVM-07008 Item 14. QUIET mode Description Operation flow and applicable data, etc. When the [QUIET] button is pressed, the fan of the indoor unit will be restricted the revolving speed at speed L − until the [QUIET] button is pressed once again (cancel Quiet mode). Quiet mode is the system which, control the revolving speed of indoor fan to work constantly at lower than speed L. In addition, noise level of indoor unit is less than usual. Remarks : 1. Quiet mode is unable to work in dry mode. 2.
FILE NO. SVM-07008 Item 17. Hi-POWER Mode Operation flow and applicable data, etc. Description ([Hi-POWER] button on the remote controller is pressed) When [Hi-POWER] button is pressed while the indoor unit is in Auto, Cooling or Heating operation, HiPOWER mark is indicated on the display of the remote controller and the unit operates as follows. 1. Automatic operation • The indoor unit operates in according to the current operation. 2.
FILE NO. SVM-07008 9-3. Auto Restart Function This indoor unit is equipped with an automatic restarting function which allows the unit to restart operating with the set operating conditions in the event of a power supply being accidentally shut down. The operation will resume without warning three minutes after power is restored. This function is not set to work when shipped from the factory. Therefore it is necessary to set it to work. 9-3-1.
FILE NO. SVM-07008 9-3-2. How to Cancel the Auto Restart Function To cancel auto restart function, proceed as follows : Repeat the setting procedure : the unit receives the signal and beeps three times. The unit will be required to be turned on with the remote controller after the main power supply is turned off. • When the system is on stand-by (not operating) Operation Press [RESET] button for more than three seconds. (Less than 10 seconds) Motions The unit is on standby. ↓ The unit starts to operate.
FILE NO. SVM-07008 9-4. Remote control 9-4-1.
FILE NO. SVM-07008 4. DRY OPERATION (COOLING ONLY) For dehumidification, a moderate cooling performance is controlled automatically. 1. Press MODE : Select Dry . 2. Press MODE : Set the desired temperature. 5. Hi-POWER OPERATION To automatically control room temperature and airflow for faster cooling or heating operation (except in DRY and FAN ONLY mode) Press HI-POWER : Start and stop the operation. 6.
FILE NO. SVM-07008 9. PRESET OPERATION Set your preferred operation for future use. The setting will be memorized by the unit for future operation (except air flow direction). 1. Select your preferred operation. 2. Press and hold PRESET for 3 seconds to memorize the setting. The P mark displays. 3. Press PRESET : Operate the preset operation. 10. AUTO RESTART OPERATION To automatically restart the conditioner after the power failure (Power of the unit must be on.) Setting 1.
FILE NO. SVM-07008 9-4-3. Name and Functions of Indications on Remote Controller [Display] All indications, except for the clock time indicator, are displayed by pressing the 1. Transmission mark This transmission mark indicates when the remote controller transmits signals to the indoor unit. 5. TIMER and clock time indicator The time setting for timer operation or the clock time is indicated. The current time is always indicated except during TIMER operation. 2.
FILE NO. SVM-07008 10. INSTALLATION PROCEDURE 170 mm or m 65 mm or more 10-1-1. Installation Diagram of Indoor and Outdoor Units ore For the rear left and left piping Hook Hoo 170 k A ir (A t t 5 3 ac h to t he Super Oxi Deo filter Batteries f ro n 6 8 f ilt e 1 Installation plate mm or m ore r Wall Insert the cushion between the indoor unit and wall, and tilt the indoor unit for better operation. Do not allow the drain hose to get slack. Cut the piping hole sloped slightly .
FILE NO. SVM-07008 10-1-2. Optional installation parts Part Code Parts name Refrigerant piping Liquid side : ∅6.35 mm Gas side : ∅9.52 mm A B Pipe insulating material (polyethylene foam, 6 mm thick) C Putty, PVC tapes Q'ty One each 1 One each 500 mm Air inlet 53 mm 280 mm 97 mm Air outlet Drain outlet Fig. 9-1-2 • Secure the outdoor unit with the fixing bolts and nuts if the unit is likely to be exposed to a strong wind.
FILE NO. SVM-07008 10-1-3. Accessory and installation parts Part No. Part name (Q’ty) 1 Part No. Part name (Q’ty) 4 Installation plate x 1 2 8 Others Flat head wood screw ∅3.1 x 16 s x 2 Super Oxi Deo filter x 1 6 Battery x 2 Mounting screw ∅4 x 25 s x 6 Remote control holder x 1 Wireless remote control x 1 Part name (Q’ty) 7 5 3 Part No. 9 Super Sterilizer filter x 1 Drain nipple* x 1 The part marked with asterisk (*) is packaged with the outdoor unit.
FILE NO. SVM-07008 10-1-4. Installation/Servicing Tools In the case of an air conditioner using R410A, in order to prevent any other refrigerant from being charged accidentally, the service port diameter of the outdoor unit control valve (3 way valve) has been changed. (1/2 UNF 20 threads per inch) • In order to increase the pressure resisting strength of the refrigerant piping, flare processing diameter and size of opposite side of flare nuts has been changed.
FILE NO. SVM-07008-1 10-2-2. Cutting a hole and mounting installation plate 10-2. Indoor Unit 10-2-1. Installation place 65 42 mm • A place which provides the spaces around the When installing the refrigerant pipes from the rear. indoor unit as shown in the above diagram. • A place where there is no obstacle near the air inlet and outlet. 90 mm • A place that allows easy installation of the piping to 66 mm the outdoor unit. • A place which allows the front panel to be opened.
FILE NO. SVM-07008 1. Securely fit the installation plate onto the wall by screwing it in the upper and lower parts to hook up the indoor unit. 2. To mount the installation plate on a concrete wall with anchor bolts, utilize the anchor bolt holes as illustrated in the above figure. 3. Install the installation plate horizontally in the wall. 10-2-3. Electrical work 1.
FILE NO. SVM-07008 10-2-4. Wiring connection 10-2-5. Piping and drain hose installation Wiring of the connecting cable can be carried out without removing of the front panel. * CAUTION • Be sure to refer to the wiring system diagram labeled inside the front panel. • Check local electrical cords and also any specific wiring instructions or limitations.
FILE NO. SVM-07008 1) Insert hexagonal wrench (∅4 mm) in a center head. Bend the connecting pipe so that it is laid within 43 mm above the wall surface. If the connecting pipe is laid exceeding 43 mm above the wall surface, the indoor unit may unstably be set on the wall. When bending the connecting pipe, make sure to use a spring bender so ∅4 mm as not to crush the pipe. Bend the connection pipe within a radius of 30 mm (∅6.35) 40 mm (∅9.52).
FILE NO. SVM-07008 10-3. Outdoor Unit 10-3-2. Refrigerant piping connection 10-3-1. Installation place • A place which provides the spaces around the outdoor unit as shown in the left diagram. • A place which can bear the weight of the outdoor unit and does not allow an increase in noise level and vibration. • A place where the operation noise and discharged air do not disturb users neighbors. • A place which is not exposed to a strong wind. • A place free of a leakage of combustible gases.
FILE NO. SVM-07008-1 (Unit : Nám) 10-3-3. Evacuating After the piping has been connected to the indoor unit, you can perform the air purge together at once. Outer dia. of copper pipe Tightening torque ∅6.35 mm 16 to 18 (1.6 to 1.8 kgf·m) ∅9.52 mm 30 to 42 (3.0 to 4.2 kgf·m) Tightening torque of flare pipe connections The operating pressure of R410A is higher than that of R22. (Approx. 1.6 times).
FILE NO. SVM-07008 Open the valve stem all the way out; but do not try to open it beyond the stopper. Securely tighten the valve stem cap with torque in the following table: Service port 9 to 10 N·m (0.9 to 1.0 kgf·m) 1 2 3 L N 10 16 to 18 N·m (1.6 to 1.8 kgf·m) 60 45 50 40 Earth line Earth line Hexagonal wrench is required. 4m 10 Liquid side (∅6.35 mm) Power cord Connecting cable 10 30 to 42 N·m (3.0 to 4.
FILE NO. SVM-07008 10-3-7. Test operation 10-3-5. Gas leak test To switch the TEST RUN (COOL) mode, press RESET button for 10 sec. (The beeper will make a short beep.) Check places for indoor unit (Flare nut connection) Valve cover Electric parts cover Check places for outdoor unit Fig. 10-3-13 Fig. 10-3-10 10-3-8. Auto restart setting This product is designed so that, after a power failure, it can restart automatically in the same operating mode as before the power failure.
FILE NO. SVM-07008 11. HOW TO DIAGNOSE THE TROUBLE The pulse modulating circuits are mounted to both indoor and outdoor units. Therefore, diagnose troubles according to the diagnosis procedure as described below. (Refer to the check points in servicing written on the wiring diagrams attached to the indoor/outdoor units.) Table 11-1 No.
FILE NO. SVM-07008 11-1-3. Operation which is not a trouble (Program operation) For controlling the air conditioner, the program operations are built in the microcomputer as described in the following table. If a claim is made for running operation, check whether or not it meets to the contents in the following table. When it does, we inform you that it is not trouble of equipment, but it is indispensable for controlling and maintaining of air conditioner. Table 11-1-1 No.
FILE NO. SVM-07008 11-3. Judgment by Flashing LED of Indoor Unit While the indoor unit monitors the operation status of the air conditioner, if the protective circuit operates, the contents of self-diagnosis are displayed with block on the indoor unit indication section. Table 11-3-1 Item A Indoor indication Check code Block display OPERATION (Green) Flashing display (1 Hz) Description for self-diagnosis Power failure (when power is ON) lamp flashes.
FILE NO. SVM-07008-1 11-4. Self-Diagnosis by Remote Controller (Check Code) 1. If the lamps are indicated as shown B to E in Table 11-3-1, execute the self-diagnosis by the remote controller. 2. When the remote controller is set to the service mode, the indoor controller diagnoses the operation condition and indicates the information of the self-diagnosis on the display of the remote controller with the check codes.
FILE NO. SVM-07008 11-4-2. Caution at servicing (1) After servicing, push the [ ] button to return to the normal mode. (2) After servicing by the check code, turn off breaker of the power supply, and turn on breaker of the power supply again so that memory in the microcomputer returns the initial status. However, the check codes are not deleted even if the power supply is turned off because they are stored in the fixed memory.
FILE NO. SVM-7008 Block distinction Check code Block Operation of diagnosis function Check code Cause of operation Air conditioner status Remarks Judgment and action Inverter over-current protective circuit operates. (Short time) Position-detect circuit error or short-circuit between windings of compressor All off Displayed when error is detected. All off Displayed when error is detected. Current-detect circuit error All off Displayed when error is detected.
FILE NO. SVM-07008 11-5. Judgement of Trouble by Every Symptom 11-5-1. Indoor unit (Including remote controller) (1) Power is not turned on (Does not operate entirely) Turn off power supply once, and 5 second later, turn it on again.
FILE NO. SVM-07008 (2) Power is not turned on though Indoor P.C. board is replaced Turn on power supply. NO Does operation lamp flash? Is wired correctly to white and black lead wires of terminal board? YES NO Correct wiring. YES To item of “Power is not turned on”.
FILE NO. SVM-07008 (3) Only the indoor fan does not operate. Shut off the power supply once. Turn the power supply. Does the fan stop in no operating status? NO Replace the P.C. board. Control P.C. board is defective. YES Start the operation with low fan setting in cool operation.
FILE NO. SVM-07008 (4) Indoor fan motor starts rotating by turning on power supply alone. The IC is built in the indoor fan motor. Therefore the P.C. board is also mounted to the inside of the motor. If the P.C. board is soldered imperfectly or the IC is defective, the fan motor may automatically rotate by turning on power supply. (1) Remove the front panel. (2) Remove cover of the fan motor lead wires. (3) Check DC voltage with CN31 connector while the fan rotating.
FILE NO. SVM-07008 (5) Troubleshooting for remote control The unit does not beep at all. OPERATION lamp on indoor unit is not indicated. Press [ ] button. Is transmission mark indicated? NO YES Is receiver on indoor unit exposed to direct sunlight? Press RESET button on remote control with tip of pencil. NO YES Is there any thyristor fluorescent light nearly? NO NO YES Does indoor unit operate when moving remote control near receiver or indoor unit? Press [ ] button.
FILE NO. SVM-07008 11-5-2. Wiring Failure (Interconnecting and serial signal wire) (1) Outdoor unit does not operate. 1) Is the voltage between indoor terminal block 2 and 3 varied? Confirm that transmission from indoor to outdoor is correctly performed based on the following diagram. NOTE: • Measurement should be performed 2 minutes and 30 seconds after starting of the operation. • Be sure to prepare a diode for judgment.
FILE NO. SVM-07008 11-6. Check Code 1C (Miswiring in indoor/outdoor units) and 1E 1C 1E Gas leakage, disconnection of TS/TC sensors (Check code 02, 1C) Discharge temp. error, gas leakage (Check code 03, 1E) Valve drive check Is coil of the pulse modulation valve (P.M.V.) correctly set? NO Set it correctly. YES Is connector of coil connected to inverter? NO Set it correctly.
FILE NO. SVM-07008 11-7. How to Diagnose Trouble in Outdoor Unit 11-7-1. Summarized inner diagnosis of inverter assembly Table 11-7-1 Diagnosis/Process flowchart Item Contents Preparation Remove connector of compressor. Check Check 25 A fuse (Part No.F01). NG OK Replace fuse. Turn “OFF” the power breaker, and remove 3P connector which connects inverter and compressor. • Check whether 25 A fuse on the control board assembly is blown or not.
FILE NO. SVM-07008 Diagnosis/Process flowchart A B Item Contents Check C Check winding of compressor. Check winding resistance between phases of compressor, and resistance between outdoor frames by using a tester. • Is not grounded. • Is not short-circuited between windings. • Winding is not opened. NG OK NG Check fan motor position detect signal. Replace compressor. Operation Replace outdoor fan motor.
FILE NO. SVM-07008 (3) Checking procedure. Table 11-6-1 No. Procedure Check Point (Symptom) Causes 1 Shut off the power supply and remove the P.C. board assembly from the electronic parts base. Remove the connecting cable from the terminal block. 1. Is the fuse blown? 1. Application of shock voltage. Overload by short-circuit of the parts. 2 Remove the connector for the motor, and turn the power on. If the OPERATION lamp blinks (0.5 sec. : ON, 0.5 sec.
FILE NO. SVM-07008 100 Resistance value (k ) 90 80 TD 70 60 50 40 TD TA TC TO TE 30 20 TA, TC, TO, TE 10 0 0 10 20 30 40 50 Temperature (˚C) – 75 – : Discharge temp. sensor : Room temp. sensor : Heat exchanger temp. sensor : Outdoor temp. sensor : Outdoor heat exchanger temp. sensor.
FILE NO. SVM-07008 11-8-3. Indoor unit (Other parts) No. 1 Part name Room temp. (TA) sensor Heat exchanger (TC) sensor Checking procedure Disconnect the connector and measure the resistance value with tester. (Normal temp.) Temperature Sensor TA, TC (kΩ) 10°C 20°C 25°C 30°C 40°C 20.7 12.6 10.0 7.9 4.5 2 Remote control To item of How to judge whether remote control is good or bad of the Judgment of trouble by symptom.
FILE NO. SVM-07008 3 Outdoor temperature sensor Disconnect the connector, and measure resistance value with the tester. (Normal temperature) (TO), discharge temperature sensor (TD), suction temperature Temperature sensor (TS), outdoor heat 10°C 20°C 30°C 40°C 50°C Sensor exchanger temperature sensor (TE) TA, TC (k ) 105 64 41 27 18 TGa : Heat pump model only. TO, TS, TE : Refer to the TA, TC characteristic table in Indoor (Refer to Table 10-8-3, No.1). 11-8-5. Checking Method for Each Part No.
FILE NO. SVM-7008 11-9. How to Simply Judge Whether Outdoor Fan Motor is Good or Bad 1. Symptom • Outdoor fan motor does not rotate. • Outdoor fan motor stops within several ten seconds though it starts rotating. • Outdoor fan motor rotates or does not rotate according to the position where the fan stopped., etc. Remote controller check code “02 : Outdoor block, 1A : Outdoor fan drive system error” 2. Cause The following causes are considered when the outdoor fan motor does not normally rotate.
FILE NO. SVM-07008 12. PART REPLACEMENT 12-1. Indoor Unit No. 1 Part name Front panel Procedures How to remove the front panel 1) Stop the operation of the air conditioner and turn off its main power supply. 2) Pull the air inlet grille toward you to open it and remove the air inlet grille. Then remove the 2 screws fixing the front panel. 3) First open the horizontal louver, and then remove the front panel from the back body by pulling it toward you.
FILE NO. SVM-07008 No. Part name Procedures 4 Heat exchanger 1) Remove the front panel, electrical part and the horizontal louver following procedure 3. 2) Remove the pipe holder at the rear side of main unit. 3) Remove the 2 screws on the heat exchanger at the base bearing.
FILE NO. SVM-07008 12-2. Microcomputer No. 1 Part name Common procedure Procedures 1) Turn the power supply off to stop the operation of air conditioner. 2) Remove the front panel. • Remove the 4 fixing screws. 3) Remove the electrical part base.
Component side – 81 – Remarks Replace the thermal fuse, terminal block, microcomputer ass’y and the P.C.FILE NO. SVM-07008
FILE NO. SVM-07008 12-3-1. Outdoor Unit No. 1 Part name Common procedure Procedures 1. Detachment 1) Stop operation of the air conditioner, and turn off the main switch and breaker of the air conditioner. 2) Remove the valve cover. (ST1T∅4 x 10s 1 pc) • After removing screw, remove the valve cover pulling it downward. 3) Remove the wiring cover (ST1T∅4 x 10s 2 pcs.), and then remove the power cord, connecting cable, and cord clamp (ST2T∅4 x 16s 3 pcs.). 4) Remove the upper cabinet. (ST1T∅4 x 10s 5 pcs.
FILE NO. SVM-07008 No. 3 Part name Inverter assembly Procedures Remarks 1) Perform work of item 1 of 1. 2) Remove screw (ST1T∅4 x 10s 1 pc.) of the upper part of the front cabinet. • If removing the inverter cover in this condition, the P.C. board can be checked. • If there is no space in the upper part of the upper cabinet, perform work of 2. Inverter cover PC board (Soldered surface) Be careful when checking the inverter because high-voltage circuit is incorporated in it.
FILE NO. SVM-07008 No. 4 Part name Control board assembly Procedures 1) Disconnect lead wires and connectors connected from the control board assembly to other parts. 1. Lead wires • Connection with terminal block : 3 wires (Black, White, Orange) • Connection with compressor : remove the connector (3P) • Connection with reactor : remove the connector (2P) 2.
FILE NO. SVM-07008 No. ƒ Compressor Reactor 1) Perform work of item 1 of 1 and 1 of 2. 2) Remove the flange nut fixing the fan motor and the propeller fan. • Flange nut is loosened by turning clockwise. (To tighten the flange nut, turn counterclockwise.) 3) Remove the propeller fan. 4) Disconnect the connector for the fan motor from the inverter. 5) Remove the fixing screws (4 pcs.) holding the fan motor by hand so that it does not fall.
FILE NO. SVM-07008 No. † Part name Fan guard Procedures Remarks 1. Detachment 1) Perform work of item 1 of 1 and 1 of 2. Requirement: Perform the work on a corrugated cardboard, cloth, etc. to prevent scratches to the product. 2) Remove the front cabinet, and place it down so that the fan guard side faces downwards. 3) Remove the hooking claws by pushing a minus screwdriver according to the arrow mark in the right figure, and remove the fan guard. 2.
FILE NO. SVM-07008 No. Part name ! Replacement of temperature sensor for servicing only Procedures Remarks 1) Cut the sensor 100 mm longer than old one. 2) Cut the protective tube after pulling out it (200 mm). 3) Move the protective tube toward the Common service thermal sensor side and tear the tip of parts of sensor lead wire in two, then strip the covering TO, TS, TE, TD part. 4) Pass the stripped part through the thermal constringent tube.
FILE NO. SVM 07008 13. EXPLODED VIEWS AND PARTS LIST 13-1. Indoor Unit (E-Parts Assy) 411 405 401 403 410 Location No. Part No. 401 403 404 43T60365 43T69319 43T69320 404 Description Location No. Part No.
FILE NO. SVM-07008 13-2. Indoor Unit Location No. Part No. 201 202 202 43T00478 43T09402 43T09404 203 204 205 206 207 208 209 210 211 212 43T03357 43T80317 43T09392 43T70313 43T79301 43T21363 43T44387 43T47353 43T47355 43T11319 Description Location No. Part No.
FILE NO. SVM-07008 13-3. Outdoor Unit Location Part 1 2 3 4 5 6 7 8 9 10 11 12 13 14 43T19335 43T20324 43T00482 43T43403 43T62323 43T19336 43T47308 43T46331 43T47332 43T46332 43T47331 43T21396 43T47001 43T19312 Description Location No. Part No.
FILE NO. SVM-07008 13-4. Outdoor Unit (E-Parts Assy) 701 704 702 707 703 708 706 705 Location Part 701 702 703 704 43T62320 43T69620 43T60352 43T60326 Description Location No. Part No.
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