FILE NO. SVM-03008 SERVICE MANUAL AIR CONDITIONER SPLIT WALL TYPE RAS-13UKV-E2 / RAS-13UAV-E2 Jun.
FILE NO. SVM-03008 CONTENTS 1. SPECIFICATIONS 1-1 1-2 1-2 2. REFRIGERANT R410A 2-1 2-2 2-3 2-4. 2-5. 3. 7. 6-1 Refrigerant Cycle Diagram 6-2 Operation Data CONTROL BLOCK DIAGRAM Indoor Unit Outdoor Unit (Inverter Assembly) OPERATION DESCRIPTION 8-1 8-2 8-3 8-4 8-5 8-6 8-7 9. Indoor Unit Outdoor Unit REFRIGERANT CYCLE DIAGRAM 7-1 7-2 8. Indoor Unit Outdoor Unit SPECIFICATION OF ELECTRICAL PARTS 5-1 5-2 6. Indoor Unit Outdoor Unit WIRING DIAGRAM 4-1 4-2 5.
FILE NO. SVM-03008 10. HOW TO DIAGNOSE THE TROUBLE 10-1 10-2 10-3 10-4 10-5 10-6 10-7 10-8 10-9 First Confirmation Primary Judgment Judgment by Flashing LED of Indoor Unit Self-Diagnosis by Remote Control (Check Code) Judgment of Trouble by Every Symptom Check Code 1C (Miswiring in indoor/outdoor units) and 1E How to Diagnose Trouble in Outdoor Unit How to Check Simply the Main Parts How to Simply Judge Whether Outdoor Fan Motor is Good or Bad 11.
FILE NO. SVM-03008 1. SPECIFICATIONS 1-1.
FILE NO. SVM-03008 1-2. Operation Characteristic Curve 7 7 6 6 5 5 Current (A) Current (A) 4 3 2 0 0 20 40 60 80 3 2 • Conditions Indoor : DB 27°C/WB 19°C Outdoor : DB 35°C Air flow : High Pipe length : 5m 230V 1 4 • Conditions Indoor : DB 20°C Outdoor : DB 7°C/WB 6°C Air flow : High Pipe length : 5m 230V 1 0 100 0 Compressor speed (rps) 20 40 60 80 100 Compressor speed (rps) 1-3.
FILE NO. SVM-03008 2. 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-03008 Table 2-2-1 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-03008 Table 2-2-3 Dimensions related to flare processing for R410A A (mm) Outer diameter (mm) Thickness (mm) 1/4 6.35 3/8 Nominal diameter Conventional flare tool Flare tool for R410A clutch type Clutch type Wing nut type 0.8 0 to 0.5 1.0 to 1.5 1.5 to 2.0 9.52 0.8 0 to 0.5 1.0 to 1.5 1.5 to 2.0 1/2 12.70 0.8 0 to 0.5 1.0 to 1.5 2.0 to 2.5 5/8 15.88 1.0 0 to 0.5 1.0 to 1.5 2.0 to 2.
FILE NO. SVM-03008 Fig. 2-2-2 Relations between flare nut and flare seal surface (2) Flare Connecting Procedures and Precautions a) Make sure that the flare and union portions do not have any scar or dust, etc. When it is strong, the flare nut may crack and may be made non-removable. When choosing the tightening torque, comply with values designated by manufacturers. Table 2-2-7 shows reference values. b) Correctly align the processed flare surface with the union axis.
FILE NO. SVM-03008 2-3. Tools 2-3-1. Required tools The service port diameter of packed valve of the outdoor unit in the air conditioner 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 ∅12.70 copper pipe) of the refrigerant piping are lengthened.
FILE NO. SVM-03008 2-4. 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-03008 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-03008 (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-03008 3. CONSTRUCTION VIEWS 3-1. Indoor Unit Front panel Air filter Air inlet Heat exchanger 208 790 48 Air outlet 6 6 60 60 275 Back body Knock out system 48 Knock out system 64 53 590 120 80 Hanger Drain hose (0.54m) Connecting pipe (0.43m) (Flare ∅6.35) Connecting pipe (0.33m) Flare ∅9.
FILE NO. SVM-03008 3-2. Outdoor Unit A 102 B Detail drawing (Front Leg) 310 302 R15 125 ∅6 Hole 310 302 ∅6 Hole 52 36 115 310 302 32.5 A Detail drawing (Back Leg) 600 36 ∅11 x 14 Hole R5.5 R15 B ∅30 Drain outlet ∅436 52 2-∅11 x 14 Hole (For ∅8-∅10 anchor bolt) FAN GUARD COVER PV 265 530 Z 270 600 310 330 90 780 62 Electrical part cover 54 120 75 Liquid side (Flare ∅6.35) Gas side (Flare ∅9.
FILE NO. SVM-03008 4. WIRING DIAGRAM 4-1. Indoor Unit Table 4-1-1 Simple Check for Failure Diagnosis Diagnosis Result Check Item 1 OPERATION INDICATOR Check to see if the OPERATION indicator goes on and off when the main switch or breaker is turned on. (Check the primary and secondary voltage of the transformer.) 2 TERMINAL BLOCK Check the power supply voltage between 1 and 2. (Refer to the name plate.) (Check the primary and secondary voltage of the transformer.
FILE NO. SVM-03008 4-2.
FILE NO. SVM-03008 5. SPECIFICATION OF ELECTRICAL PARTS 5-1. Indoor Unit No. Parts name Type ICF-340-30-2 Specifications 1 Fan motor (for indoor) DC 340 V, 30 W 2 Thermo.
FILE NO. SVM-03008 6. REFRIGERANT CYCLE DIAGRAM 6-1. Refrigerant Cycle Diagram INDOOR UNIT T1 Temp. measurement Cross flow fan P Pressure measurement Gauge attaching port Vacuum pump connecting port Deoxidized copper pipe Outer dia. : 6.35 mm Thickness : 0.8 mm Sectional shape of heat insulator Deoxidized copper pipe Outer dia. : 9.52 mm Thickness : 0.8 mm Allowable pipe length Allowable height difference : 10m Indoor heat exchanger Max.
FILE NO. SVM-03008 6-2. Operation Data Temperature condition (°C) Indoor Outdoor 27/19 35/– Heat exchanger pipe temp. Standard pressure P (MPa) T1 (°C) T2 (°C) Indoor fan mode 13UKV-E2 0.8 to 1.0 9 to 11 49 to 45 High Model name Outdoor Compressor fan revolution mode (rps) High 77 Temperature condition (°C) Indoor Outdoor 20/– 7/6 Heat exchanger pipe temp. Standard pressure P (MPa) T1 (°C) T2 (°C) Indoor fan mode 13UKV-E2 2.5 to 2.
FILE NO. SVM-03008 7. CONTROL BLOCK DIAGRAM 7-1. Indoor Unit Indoor Unit Control Panel M.C.U Heat Exchanger Sensor Temperature Sensor 36.7KHz Operation Display • 3-minute Delay at Restart for Compressor Filter Sign Display Initiallizing Circuit • Processing (Temperature Processing) PRE DEF.
– 21 – Heat exchanger temp.sensor Suction temp. sensor Outdoor air temp. sensor Discharge temp. sensor 220 − 240 V 50/60 Hz Noise Filter Inddor unit send/receive circuit For INDOOR UNIT Relay circuit 4-way valve P.M.V. Converter (AC → DC) Driver circuit of P.M.V.
FILE NO. SVM-03008 8. OPERATION DESCRIPTION 8-1. Outlined of Air Conditioner Control This air conditioner is a capacity-variable type air conditioner, which uses DC motor for the indoor fan motor and the outdoor fan motor. And the capacity proportional control compressor which can change the motor speed in the range from 13 to 110 rps is mounted. The DC motor drive circuit is mounted to the indoor unit. The compressor and the inverter to control fan motor are mounted to the outdoor unit.
FILE NO. SVM-03008 (3) Contents of operation command signal (Serial signal) from indoor unit controller to outdoor unit controller The following three types of signals are sent from the indoor unit controller. • Operation mode set on the remote control • Compressor revolution command signal defined by indoor temperature and set temperature (Correction along with variation of room temperature and correction of indoor heat exchanger temperature are added.
FILE NO. SVM-03008 8-1-4. Prevent-freezing control 8-1.7. Indoor fan control (DC fan motor) The indoor heat exchanger sensor detects refrigerant vapor temperature in COOL/DRY operation. If the temperature is below the specified value, compressor motor speed is reduced so that operation is performed in temperature below the specified value to preventfreezing of indoor heat exchanger. (1) The indoor fan is operated by the stepless speed change DC motor. 8-1-5. P.M.V. (Pulse Modulating Valve) Using P.M.V.
FILE NO. SVM-03008 8-1-8. Outdoor fan control (DC fan motor) Although the outdoor fan motor drives the outdoor fan by non-step variable system of the revolution speed, the revolution speed is restricted to three steps on the convenience of controlling. If a strong wind is lashing outside of the room, the operation may be continued as the outdoor fan stops in order to protect the outdoor fan motor. If a fan lock occurred due to entering of foreign matter, the air conditioner stops and an alarm is displayed.
FILE NO. SVM-03008 8-2. Description of Operation Circuit • • Turning [ON] the breaker flashes the operation lamp. (1Hz) This is the display of power-ON (or notification of power failure). When pushing [START/STOP] button of the remote control, receive sound is issued from the main unit, and the next operations are performed together with opening the vertical air flow louvers. 8-2-1. Cooling operation (The Remote Control MODE Button is Set to the COOL Position) • • (Room temp.) − (Set temp.
FILE NO. SVM-03008 (4) Limit for maximum compressor motor speed by indoor fan speed When outdoor temperature sensor detected 32°C or lower, and indoor heat exchanger sensor detected 17°C or lower, the maximum compressor motor speed is limited by the indoor fan speed. For example, the compressor motor speed is limited as described in the table below. Table 8-2-1 6) Control 6 (F zone) : Operation stop zone If TD detect value exceeds 117°C during operation, stop the operation immediately.
FILE NO. SVM-03008 8-2-2. DRY operation (The Remote Control MODE Button is Set to the DRY Position) • • • • Set 0 LOW temp. −0.5 Once the setting is made, the operation mode is −1 memorized in the microcomputer so that the same −1.5 * 12 operation can be effected thereafter simply by −2 * pushing [START/STOP] button. Dry operation signal is transmitted to outdoor unit. M+ The Cooling operation giving priority to dehumidifying, which restrains the indoor fan speed −5.
FILE NO. SVM-03008 FAN AUTO FAN Manual In starting In stability • Until 12 minutes passed after operation start • When 12 to 25 minutes passed after operation start and room temp. is 3°C or lower than set temp. • When 12 to 25 minutes passed after operation start and room temp. is higher than (set temp. –3°C) • When 25 minutes or more passed after operation start • Room temp. < Set • Room temp. temp. –4°C Set temp. –3.5°C Outside air temp. (°C) [In starting and in stability] TO 9.8A 16.0 15.
FILE NO. SVM-03008 2) Defrost operation Operation of the compressor is stopped once, turn off power coupler for 4-way valves after 10 seconds, and then exchange the 4-way valves. After 20 seconds, restart operation of the compressor. Turn off the outdoor fan just when the compressor stopped. If temperature of the indoor heat exchanger lowered than 38°C, stop the indoor fan. 3) Defrost reset Resetting operation from defrost to heating is performed when anyone of the following conditions is satisfied. a.
FILE NO. SVM-03008 8-3. Temporary Operation • Temporary Auto operation, existence of Auto Restart, and Temporary Cooling operation can be set by the TEMPORARY button of the indoor controller. TEMPORARY button TEMPORARY button Fig. 8-3-1 Table 8-3-1 TEMPORARY button Control OFF → ON Temporary Auto operation start After pushing button for 3 seconds Auto Restart control select After pushing button for 10 seconds Temporary Cooling operation start 8-3-1.
FILE NO. SVM-03008 8-4. Auto Restart Function 8-4-1. How to set auto restart function The 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 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.
FILE NO. SVM-03008 8-4-2. How to cancel 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 control after the main power supply is turned off. • When the system is on standby (Not operating) Operation Motions The unit is on standby. → Push [TEMPORARY] button for more than three seconds. The unit starts to operate. → 0 3S After approx.
FILE NO. SVM-03008 $ Memory button (MEMO) Keep pushing the MEMO button for 2 seconds 8-6-1. Parts name of remote control from the beginning, or keep pushing the button for 2 seconds after pushing it once for a short time. 1 Infrared signal emitter Then the set data is stored in the memory and Transmits a signal to the indoor unit. is displayed. 2 START/STOP button % Automatic operation button (AUTO) Push the button to start operation.
FILE NO. SVM-03008 8-6-2. Names and functions of indications on remote control [Display] All indications, except for clock time indication, are indicated by pushing the START/STOP button. 1 Transmission mark This transmission mark , indicates when the remote controller transmits signals to the indoor unit. 2 Mode display Indicates the current operation mode.
FILE NO. SVM-03008 8-7. Hi POWER Mode ([Hi POWER] button on the remote control is pushed.) When [Hi POWER] button is pushed while the indoor unit is in Auto, Cooling or Heating operation, Hi POWER mark is indicated on the display of the remote control and the unit operates as follows. (1) Automatic operation • The indoor unit operates in according to the current operation. (2) Cooling operation • The preset temperature drops 1°C. (The value of the preset temperature on the remote controller does not change.
FILE NO. SVM-03008 9. INSTALLATION PROCEDURE 9-1. Safety Cautions For general public use Power supply cord of parts of appliance for outdoor use shall be at least polychloroprene sheathed flexible cord (design H07RN-F), or cord designation 245 IEC66. (1.5 mm2 or more) CAUTION New Refrigerant Air conditioner Installation • THIS AIR CONDITIONER USES THE NEW HFC REFRGERANT (R410A), WHICH DOES NOT DESTROY THE OZONE LAYER.
FILE NO. SVM-03008 DANGER • FOR USE BY QUALIFIED PERSONS ONLY. • TURN OFF MAIN POWER SUPPLY BEFORE ATTEMPTING ANY ELECTRICAL WORK. MAKE SURE ALL POWER SWITCHES ARE OFF. FAILURE TO DO SO MAY CAUSE ELECTRIC SHOCK. • CONNECT THE CONNECTING CABLE CORRECTLY. IF THE CONNECTING CABLE IS CONNECTED WRONGLY, ELECTRIC PARTS MAY BE DAMAGED. • CHECK THE EARTH WIRE THAT IT IS NOT BROKEN OR DISCONNECTED BEFORE INSTALLATION. • DO NOT INSTALL NEAR CONCENTRATIONS OF COMBUSTIBLE GAS OR GAS VAPORS.
FILE NO. SVM-03008 65 mm or more 9-1-1. Installation Diagram of Indoor and Outdoor Units 170 or m mm ore For the rear left and left piping Hook Wall 1 Installation plate Hoo Air (At tac h to 5 Zeolite filter filte 170 or m mm ore k Insert the cushion between the indoor unit and wall, and lift the indoor unit for better operation. Do not allow the drain hose to get slack.
FILE NO. SVM-03008 9-1-2. Optional installation parts Part Code Q’ty Parts name A Refrigerant piping Liquid side : ∅6.35 mm Gas side : ∅9.52 mm B Pipe insulating material (polyethylene foam, 6 mm thick) C Putty, PVC tapes One each 1 One each 600 Suction side 76 310 115 Diffuser Drain hole 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-03008 9-1-3. 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 Zeolite 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 Purifying filter x 1 Drain nipple* x 1 The part marked with asterisk (*) is packaged with the outdoor unit.
FILE NO. SVM-03008 9-1-4. 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-03008 9-2-2. Cutting a hole and mounting installation plate 9-2. Indoor Unit 9-2-1. Installation place • 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. • A place that allows easy installation of the piping to the outdoor unit. • A place which allows the front panel to be opened.
FILE NO. SVM-03008 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. 9-2-3. Electrical work 1. The supply voltage must be the same as the rated voltage of the air conditioner.
FILE NO. SVM-03008 9-2-4. Wiring connection 9-2-5. 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-03008 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-03008 9-2-6. Indoor unit fixing 2. Put water in the drain pan and make sure that the water is drained out of doors. 1. Pass the pipe through the hole in the wall, and hook 3. When connecting extension drain hose, insulate the the indoor unit on the installation plate at the upper connecting part of extension drain hose with shield hooks. pipe. 2. Swing the indoor unit to right and left to confirm that it is firmly hooked up on the installation plate. Shield pipe 3.
FILE NO. SVM-03008 9-3. Outdoor Unit 9-3-2. Refrigerant piping connection 9-3-1. 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-03008 (Unit : N·m) 9-3-3. Evacuating 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) After the piping has been connected to the indoor unit, you can perform the air purge together at once. • Tightening torque of flare pipe connections The operating pressure of R410A is higher than that of R22. (Approx. 1.6 times).
FILE NO. SVM-03008 • 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: Liquid side (∅6.35 mm) 16 to 18 N·m (1.6 to 1.8 kgf·m) Service port 9 to 10 N·m (0.9 to 1.0 kgf·m) Power cord Connecting cable 1 2 3 L N 10 30 to 42 N·m (3.0 to 4.2 kgf·m) Hexagonal wrench is required. 40 30 m 4m 10 10 10 Gas side (∅9.
FILE NO. SVM-03008 9-3-5. Gas leak test 9-3-7. Auto restart setting Check places for indoor unit (Flare nut connection) This product is designed so that, after a power failure, it can restart automatically in the same operating mode as before the power failure. Valve cover Information The product was shipped with Auto Restart function in the off position. Turn it on as required.
FILE NO. SVM-03008 10. 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 10-1 No.
FILE NO. SVM-03008 10-1-3. 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 10-1-1 No.
FILE NO. SVM-03008 10-3. 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 10-3-1 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-03008 10-4. Self-Diagnosis by Remote Control (Check Code) (1) If the lamps are indicated as shown B to H in Table 10-3-1, excute the self-diagnosis by the remote control. (2) When the remote control is set to the service mode, the indoor control diagnoses the operation condition and indicate the information of the self-diagnosis on the display of the remote control with the check codes.
FILE NO. SVM-03008 10-4-2. Caution at servicing (1) After servicing, push the START/STOP 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-03008 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-03008 10-5. Judgment of Trouble by Every Symptom 10-5-1. Indoor unit (Including remote contro) (1) Power is not turned on (Does not operate entirely) 1. Is the supply voltage normal? 2. Is the normal voltage provided to the outdoor unit? 3. Is the crossover cable connected properly? 4. Is the fuse (F01) blown? Operation Check Item Considerable principle cause Turn off power supply once, and 5 second later, turn it on again.
FILE NO. SVM-03008 (2) Power is not turned on though Indoor P.C. board is replaced Turn on power supply. Does operation lamp flash? YES NO Is wired connectly to white and black lead wires of terminal block? NO Correct wirng. YES To item of Power supply is not turned on .
FILE NO. SVM-03008 (3) Only indoor fan motor does not operate. (1) Is it possible to detect the power supply voltage (200 – 240 V) between 1 and 2 on the terminal block? (2) Does the indoor fan motor operate in cooling operation? (In heating operation, the indoor fan motor does not operate for approximately 5 minutes after it is turned on, to prevent a cold air from blowing in.) Turn off power supply once, and turn it on again.
FILE NO. SVM-03008 (4) Indoor fan motor automatically starts to rotate by turning on power supply. The IC is built in the indoor fan motor. Therefore the P.C. board is also mounted to 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. (Remove 4 screws.) (2) Remove the cover of the fan motor lead wires.
FILE NO. SVM-03008 (5) Troubleshooting for remote control Press START/STOP button. Is transmission mark indicated? The unit does not beep at all. OPERATION lamp on indoor unit is not 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 nearby? NO NO YES Does indoor unit operate when moving remote control near receiver or indoor unit? Press START/STOP button.
FILE NO. SVM-03008 10-5-2. 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-03008 10-6. 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-03008 10-7. How to Diagnose Trouble in Outdoor Unit 10-7-1. Summarized inner diagnosis of inverter assembly Table 10-7-1 Diagnosis/Process flowchart Item Contents Preparation Remove connector of compressor. Check Check 15 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-03008 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-03008 (3) Check procedures Table 10-8-1 No. Procedure Check points (Symptom) 1 Turn off the power supply and remove the P.C. board assembly from electronic parts base. Remove the connecting cables from the terminal block. Check whether or not the fuse (F01) is blown. Impulse voltage was applied or the indoor fan motor short-circuited. 2 Remove the connector of the motor and turn on the power supply.
FILE NO. SVM-03008 10-8-2. P.C. board layout GND +12V +5V Bottom View (For the Top View, refer to page 65.) [1] Sensor characteristic table 100 Resistance value (kΩ) 90 80 TD 70 60 50 40 30 20 TA, TC, TO, TE, TS 10 0 0 10 20 30 40 50 Temperature (°C) – 68 – TD TA TC TO TE TS : : : : : : Discharge temp. sensor Room temp. sensor Heat exchanger temp. sensor Outdoor temp. sensor Outdoor heat exchanger temp. sensor Suction temp.
FILE NO. SVM-03008 10-8-3. 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 10°C 20°C 25°C 30°C 40°C 20.7 12.6 10.0 7.9 4.5 TA, TC (kΩ) 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-03008 10-8-5. Checking Method for Each Part No. Electrolytic capacitor (For raising pressure, smoothing) Checking procedure 1. Turn OFF the power supply breaker. 2. Discharge all three capacitors completely. 3. Check that safety valve at the bottom of capacitor is not broken. 4. Check that vessel is not swollen or exploded. 5. Check that electrolytic liquid does not blow off. 6. Check that the normal charging characteristics are show in continuity test by the tester.
FILE NO. SVM-03008 10-9. 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-03008 11. HOW TO REPLACE THE MAIN PARTS 11-1. Indoor Unit No. 1 Part name Front panel Procedures How to remove the front panel 1) Stop 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 4 screws fixing the front panel. 3) Open the horizontal louver, and then remove the front panel from the back body by pulling it toward you.
FILE NO. SVM-03008 No. 4 Part name Heat exchanger Procedures Remarks 1) Remove the front panel, electrical part and the horizontal louver with the procedure 3. 2) Remove the pipe holder on the rear side of the main unit. 3) Remove 2 screws of the heat exchanger on the base bearing side. 4) Remove 2 screws of the heat exchanger on the left side (upper and lower) from the back body, and then pull out the upper side of the heat exchanger slowly.
FILE NO. SVM-03008 No. 6 Part name Cross flow fan Procedures 1) Remove the front panel, electrical part, horizontal louver and the heat exchanger with the procedure 4. 2) Remove 2 screws of the band motor (L) and other 2 screws of the band motor (R) and then remove the cross flow fan. 3) Loosen the set screw of the cross flow fan then disconnect the fan and the fan motor. Notice For position of the fan motor connector and drawing out of the lead cables, refer to the procedure 5.
FILE NO. SVM-03008 11-2. Microcomputer No. 1 Part name Procedures Remarks 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. Common procedure Replace the thermal fuse, terminal block, microcomputer ass’y and the P.C. board ass’y
FILE NO. SVM-03008 11-3. Outdoor Unit No. 1 Part name Common procedure Procedures Remarks 1. Detachment 1) Stop operation of the air conditioner, and turn off the main switch of the breaker for 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 wiring cover (ST1T∅4 x 10s 2 pcs.), and then remove connecting cable. 4) Remove the upper cabinet. (ST1T∅4 x 10s 2 pcs.
FILE NO. SVM-03008 No. 3 Part name Inverter assembly Procedures 1) Perform work of item 1 of 1. 2) Remove screw (ST1T∅4 x 10s 2 pc.) of the upper part of the front cabinet. • If removing the inverter cover in this condition, P.C. board can be checked. • If there is no space in the upper part of the upper cabinet, perform work of 2. Remarks Inverter cover P. C. board (Soldered surface) Be careful to check the inverter because high-voltage circuit is incorporated in it.
FILE NO. SVM-03008 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 relay connectors from P07, 08 (2P, White) and P12, 13 (2P, Yellow). 2.
FILE NO. SVM-03008 No. 6 Part name Fan motor Procedures 1) Perform work of item 1 of 1 and 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 fan motor from the inverter. 5) Remove the fixing screws (3 pcs.) holding by hand so that the fan motor does not fall.
FILE NO. SVM-03008 No. Part name 9 Pulse modulating valve coil Procedures 1. Detachment 1) Perform work of item 1 of 1, and 2, 3, 5. 2) Turn the coil clockwise (counterclockwise) by 90 degrees, and remove coil from the pulse modulating valve. 2. Attachment 1) Set take-out part of the lead wire of coil to the coil inserting position of the pulse modulating valve, and attach the coil.
FILE NO. SVM-03008 No. " Part name Replacement of temperature sensor for servicing only Common service parts of sensor TO, TS, TE, TD 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 thermal sensor side and tear the tip of lead wire in two, then strip the covering part. 4) Pass the stripped part through the thermal constringent tube.
FILE NO. SVM-03008
FILE NO. SVM-03008 12. EXPLODED VIEWS AND PARTS LIST 12-1. Indoor Unit (E-Parts Assy) 405 406 403 402 404 401 Location No. Part No. Location No. Description Part No. Description 401 43T69319 Temperature Sensor, TC 10kΩ 25°C 404 43T62003 Cord Clamp 402 43T60001 Terminal, 2P AC300V, 20A 405 43169079 P.C. Board ASSY, WRS-LED 403 43T69320 Temperature Sensor, TA 10kΩ 25°C 406 43T69322 P.C.
FILE NO. SVM-03008 12-2. Indoor Unit 217 216 217 214 210 211 218 225 208 215 203 212 219 220 201 205 207 204 233 222 223 224 202 221 209 231 232 226 Electric Parts Assembly 229 204 234 Location No. 228 227 206 Part No. Description Location No. Part No.
FILE NO. SVM-03008 12-3. Outdoor Unit Location No. Part No. Description Location No. Part No.
FILE NO. SVM-03008 12-4. Outdoor Unit (E-Parts Assy) 701 704 702 706 TE Sensor (∅6) TS Sensor (∅6) TO Sensor (∅6) 707 TD Sensor (∅4) 705 703 3 412 3 2 1 Location No. Part No. Description Location No. Part No. Description 701 43T62312 Heatsink 705 43T50305 Temperature Sensor 702 43T69345 P.C. Board 706 43T50304 Temperature Sensor 703 43T60027 Terminal 6P 707 43T62313 Base-Plate-P.C.
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