Models SSH-I304BE/SRH-I304BE SHIVAKI SERVICE MANUAL
Contents
1. At the moment the blower is stopped up down vane auto switch is stopped and if blower is started auto switch is re operated Especially it occurs while dehumidifying or heating A ___ _ __ __ _ _____ _ _ _______ ___ __ ____ ______ ___ _ _ _ _ _ __ ________ ___ ____ PCB ass y check 16 Air Conditioner Service Manual 3 5 Left right louver does not operate at all Louver link cam assembly check Motor shaft assembly check If a constant torque is felt when rotating louver by hands the assembled condition is normal ol Connector check Disconnection short circuit malconnection Blower operating condition check At the moment the room fan is stopped louver auto swing is stopped and if room fan is started auto swing is re operated Especially it occurs while dehumidifying or heating AS PCB ass y check Step motor driving circuit Synchronous motor driving circuit 17 Air Conditioner Service Manual 3 6 Function setting by remocon is disable Power input after power off Operation ON by remocon e UCheck the transmission signal of remocon If there is no remocon transmission signal Liquid crystal remocon signal blinked check the battery or remocon operation Button remocon LED blinked If product receiving is not checked e UCheck the product receiving check the display PCB2. o EN gt Oa o mu o S aS ala en en o E 5 JE ga O Air Conditioner Service Manual WIRING DIAGRAM MODEL SSH I304BE SRH I304BE INDOOR UNIT mew CM MAIN CONTROL PCB 11 DISPLAY iC P2 H m VAL P5 4 a 053 o imum imn ane p9 9 M EVAPORATOR PART MOTOR PROTECTOR INSIDE OR OUTSIDE MAN OPTIONAL FART qus PC MOTOR MOTOR OUTDOOR UNIT COMPRESSOR VALVE IE YLW GRN YLW GRN INSID WHITE BLACK WHITE RED PURPLE y RED BLACO WHITE ME YELLOW ORANGE 3 BLUE WHITE BROWN T ES FAN EL BRON CAPACITOR py yg E ON RED YLV GN CONTACTOR 0 YLW GRN pH D 1 HI FAN MOTOROPTIONAL PART INDOOR UNIT OUTDOOR UNIT PROTECTOR INSIDE Air Conditioner Service Manual Operation Details Remote controller TEMP button Increase the temperature or time by 1 unit TEMP DOWN button Decrease the temperature or time by 1 unit ON OFF button To switch the conditioner on and off FAN SPEED button
3. Buzzer sounds Switchover the air flow by remocon In cooling mode if compressor is stopped blower is operated at low fan In dehumidifying mode to enhance the dehumidifying effect blower is operated at low fan heating mode blower is stopped or operated at low fan according to the situations defrosting hot start compressor off In Sleep operation mode blower is operated without switched over low or middle fan n artificial intelligence mode room fan switching over is not possible by remocon PCB ass y check Display PCB assy check Connector damage 18 Air Conditioner Service Manual 3 7 Cooling heating conversion is disable Heating operation ON by remocon 4 way valve connection check outdoor unit connecting wire check PCB ass y check Switchover into cooling operation by remocon and after about 30 sec check the 4 way valve relay output 4 way valve OFF If 4 way valve is OFF the refrigerant flowing sounds pee due to cycle switchover occurs 4 way valve coil resistance check 19 Air Conditioner Service Manual 4 Installation Fundamentals Leakage Freon 1 4 Case 1 Key Factor Pipe cutting Troubles amp Gas leaks due to the mal flared copper pipes with non rectangular section Causes Defect Details Cutting curved pipe leads mal rectangular section And it makes gas leakage Guidelines
4. Make pipe straight before cutting and it makes a rectangular section 20 Air Conditioner Service Manual Leakage Freon 2 4 Case 2 Key Factor Removing burrs of pipes Troubles amp Causes Gas Leaks due to the burrs caused by cutting and not removing properly Defect Details Burrs not removed properly after cutting Flaring the pipe with burrs not removed after cutting can make freon gas leakages Burrs won t make smooth contacting surfaces Guidelines Burrs should be removed clearly with REAMER Only clean surfaces prevent gas leakages 21 Air Conditioner Service Manual Leakage Freon 3 4 Case 3 Factor Flaring works Troubles Gas leaks and connecting troubles on tubings caused by the inaccurate sizing during flaring Causes works Defect Details Pipe worked with large Pipe worked with small sized sized b won t be b will make small contact assemsled into the nut with nut and gas leak against even a weak shock Guidelines Recommending sizes for several pipes which make proper connectings unit mm a Pipe dia b Hight c Flared dia 96 35 1 0 1 3 8 3 8 7 99 52 0 81 0 12 0 12 4 012 70 0 5 0 8 15 4 15 8 915 8 0 5 0 8 18 6 19 0 919 05 0 0 5 23 3 22 9 22 Air Conditioner Service Manual Leakage Freon 4 4 Factor Flare nut s fastening Troubles amp Damaged
5. at COOLING or DRY operation Pipes and Power Connection Cord The figures in this manual are based on the external view of a standard model Consequently the shape may differ from that of the air conditioner you have selected Air Conditioner Service Manmual Installation Instructions jnstallation Diagram gt Distance from ceiling should be over 50 mm Distance from wall should be over 50mm 4 Distance from the wall should be over 50mm Distance from floor should be over 2500mm Air intake distance from the wall Air intake distance from should be over 250mm the wall should be NS Y over 250mm xk e Above figure is only a simple presentation of the unit it may not match the external appearance of the unit you purchased Installation must be performed in accordance with the national wiring standards by authorized personnel only Very Important Installation must done by a registered qualified installer Refer warranty section at the back of this manual Air Conditioner Service Manual imensions Product D 20 mm 57 Indoor Unit S Wireless remote controller Outdoor Unit Unit mm en MIS v
6. for outdoor Fan rotates reversely and the unit will be shutdown with overload Fixing screw Circu it breaker Exclusive Air discharge Reversed flow Guidelines B Fix screws firmly E Confirm the R S T phase lines respectively b Each phase should be matched Circuit breaker one by one Exclusive RST 37 TCL Conditioner Service Manual Wiring mistake 2 2 Case 19 Factor Poor electric insulation Meu bles amp Major electrical problems not operating properly by bad insulations of connecting cables auses Defect Details Poor electric insulations of connecting cables between indoor and outdoor Insulation break Badly insulated or damaged cables To indoor Black From outdoor Cupper pipes Guidelines How to confirm the correct insulations of connecting cables for the troubles be insulation break 1 Outdoor runs on main electric power s supply Short between white and red cables Fuse melts on compressor s running O Short between red cable and copper pipe Fuse melts on main electric power s supply O Short between black or white cable and copper pipe Main electric braker operates on electric power s supply O Short between black or white cables Main electric braker operates after 10 20 min from electric power s supply O Short between black or white cables Occurs after drainage break into badly insulated p
7. Figure 1 Hi C RT ST 1C 2 C 4C Figure 1 Cooling automatic airflow When the temperature changes lead to changes in airflow speed the switch can only be made orderly and every grade of air flow speed runs 1 minute at least 10 Air Conditioner Service Manual 3 Dry mode running into this mode the Air cond firstly operates for 3 minutes according to cooling mode set temperature is 7 C and then takes the detected backflow air temperature minus 2 C as a new set temperature the minimum value of 5 C and runs according to cooling mode indoor fan operates at low speed at this moment the setting operation of Fan speed is invalid but Swing is adjustable 4 Heating mode On the Heating mode the room temperature is repaired After repaired the room temperature display on the LED 3 1 The control of the compressor a When ST CRT21 C the compressor is running b When ST CRT lt 1 C the compressor is off c When 1 CxST CRT 1C the compressor keeps its original state 2 Outdoor fan motor and the compressor run simultaneously except for defrosting 3 The control of indoor fan motor a Indoor fan motor can operate by automatic low middle and high airflow speed circularly b indoor fan motor s the automatic airflow speed control Indoor fan motor can operate by automatic as shown in Figure 2 ST CRT 1C 2 C 4 C Figure 2 Heating automatic airflow When the temperature changes lea
8. To select the fan speed of auto low mid high TIMER button To set automatic switching on off SLEEP button To activate the function SLEEP ECO button In cooling mode press this button temperature will increase 2 C on the base of setting temperature In heating mode press this button the temperature will decrease 2 C on the base of setting temperature MODE button To select the mode of operation SUPER button TIMER ANTI MILDEW SUPER ECO SLEEP HEALTHY 290 0293090 In cooling mode press this button the unit will give the maximum cooling temperature with 16 C In heating mode press this button the unit will give 2 the maximum heating temperature with 31 C SWING button To activate or deactivate of the movement of the DEFLECTORS DISPLAY button To switch on off the LED display if present HEALTHY button To switch on off HEALTHY funtion It is a button which controls the ionizer or plasma generator only for inverter type RESET button To restart REMOTE CONTROL DISPLAY RESET Note Each mode and relevant function will be further specified in following pages Remote Control The remote controller isnot presetting as Cooling Only Air Conditioner or Heat Pump by manufacturer Each time after the remote controller replace batteries or is energized the arrowhead will flashes the front of or Cool on LCD of the remote c
9. or less the compressor is bad Conduct the pump down test of system to check the compression capacity Power off the product Close the service valve of liquid line Rotate the valve rod clockwise to close the valve rod Start product and observe the suction pressure If compressor is normal by pumping down the system pressure is kept 0 5 psiG 0 0 35kg cm G and if the suction pressure increases the compressor is bad due to the internal leak or valve damage 4 The compressor to be assumed as bad compression should be replaced If running for a long time in a bad compression condition abnormal superheat may occur and the compressor motor is burnt Clean the cycle 3 Overcurrent flowing while running Check the working pressure and if there is no trouble it is assumed as the compressor bearing damage Replace the compressor Excessive refrigerant charging may cause the overcurrent Air Conditioner Service Manual 2 Refrigerant system 2 1 Refrigerant system troubleshooting Check the following items when troubleshooting the refrigerant system 1 The thermostat setting or remocon temperature setting is not wrong 2 Air filter is not cleaned 3 Blower fan control switch is not at low 4 Ventilation lever is not opened 5 There is no obstacle in suction or discharge side of outdoor unit 6 Dirty heat exchanger causes the heat exchanging efficiency to be down Thorough cleaning 7 Cooling heating
10. seconds either then the machine stops and goes into indoor fan motor failure protection buzzer rings three times and running light flashes at 6 times per 8 seceonds When the failure is confirmed once there is feedback signal the failue is relieved automatic 16 Air Conditioner Service Manual EXPLOSION VIEW Mode SSH I304BE INDOOR UNIT 27 26 25 24 23 52 01 15 17 Air Conditioner Service Manual EXPLOSION VIEW MODEL SRH I304BE OUTDOOR UNIT 6 27 5 A SN 24 m 23 xb 9 2 21 20 4 19 A N 18 S 12 15 16 11 18 Air Conditioner Service Manual Indoor Unit SSH I304BE 1 7080030001 pie 6 1070701048 Waer Drainage Assembly wo Face Frame O 9 wo 10 DmyPcB remove DiwhyPCBBo 3 I2 1070190058 1 as on 3 esos 3 1 1071990077 Display PCBCover 3 15 imo EewkaBoxCoe 3 16 qms Vae qiios 1090700403 1 v 073000120 as 1070701450 28 1070060003 Remo Controller Supponer 1 17900
11. 4 Especially for working on rooftop prepare a place to keep tools and take care to prevent from falling 5 While running pump down work test run do not insert hands into fan 6 Clean the Indoor outdoor connecting pipes and the manifold gauge edges to be free from dust or moisture 7 Be sure to fill refrigerant to the specified level If refrigerant is too much or short the capacity is down and trouble may occur 8 Keep tools well and check the measuring machine periodically Air Conditioner Service Manual 3 Troubleshooting 3 1 Product does not operate at all Power receptable voltage Product input voltage connecting pipe PCB assy fuse varistor pattern Power input voltage Driving load terminal Display PCB connector Connector contact check AC about 14 3V Power trans output voltage General model PCB assy check 13 Air Conditioner Service Manual 3 2 Room fan does not operate at all Connector contact check Motor output connector Motor capacitor Motor bearing inserted state Fan Blower fixed state Fan Blower contact state Motor related parts check Coil resistance TP Motor detail check Motor capacitor Motor insulation resistance Error code check Communication effor Blower lock sensing In dehumidifying heating or artificia
12. 60070 ele Not shown in Explosion view Air Conditioner Service Manual Outdoor Unit SRH I304BE 3 h s 3 moss comme i Motor Supporer 1 s uoi jowderMow o 6 7 oso Left Grille Supporter 1081990047 Plate n i D 2 2 2 2 24 2 2 27 20 Air Conditioner Service Manual 1 TROUBLE SHOOTING INDEX 1 Electric parts 2 Refrigerant system 3 Troubleshooting 4 Installation Fundamentals Air Conditioner Service Manual 1 Electric parts is compressor and motor fan that finally drives after power is supplied And it is necessary to check the inter nal factors like switches protectors or lead wires that are needed to reach the compressor and motor fan to see if their connections are normal and the external factors to see if voltage is normally supplied 1 1 External factors check 1 Working power and voltage drop The rated voltage for airconditioner is specified in a workable range In order to operate airconditioner normally it is desirable for the working voltage and minimum starting voltage to be within the following chart range Especially just the fact that the voltage when airconditioner is not at work is within the working voltage range is insufficient and the voltage is sure to be within the working voltage range by measu
13. Manual Leakage Drainage 2 5 Case 6 1 Drain hose extend adding another hose Factor 2 Drain hose laying Troubles amp Causes Water leaks came from the extending or laying work of drain hose Defect Details 1 Improperly extended drain hose 2 Curved or upward drain hose Water leaks through the inside connected drain Drain hose Guidelines E Connect the extending hose outside and seal Install the drain hose straightened and with bond and finish by taping downward Drain hose Extending hose _ Downward 25 Air Conditioner Service Manual Leakage Drainage 3 5 Case 7 Factor Drain piping and ending Troubles amp Water leaks caused by upwarded drain hose along the wall through hole and clogged drain Causes hose with water Defect Details 1 Upwarded drain hose along the wall through 2 Clogged drain hose with water Drainage can t flow down across the wall Drainage can t flow down along the hose Guidelines E The wall through hole should be downward Don t make drain hose clogged with water Arrange gap 26 Air Conditioner Service Manual Leakage Drainage 4 5 Case 8 Factor Insulation work on connecting parts and hidden parts of tubings Troubles amp Water leaks caused by wrong insulation works on tubing lines Causes Defect Details 1 Incomplete insulation works on tube 2 Un insulated hidden parts connec
14. PT1 settles for IPT1 IPTmax AIPT 8 C b 15 gt 50 running time t5z50min the compressor runs cumulatively t5 is removable and could be less than t1 c IPT lt 40 C and lasts 2min Running into defrosting on condition 1 the first running time of set defrosting is F 8min after running a defrosting cycle the defrosting time should be determined and adjusted Figure 3 Condition 2 When running time is more than or equal to 120 min compressor is running accumulatively the indoor temperature is less than 35 for 2 min sustained Running into defrosting under condition 2 defrosting time set is 8 min Condition 3 after the compressor is operating for 20min continuously the indoor temperature is less than 23 C which is anti cold wind temperature when the fan stops running including temperature droping when compressor operating not including the compressor s starting course and the machine runs into defrosting according to any one condiciton as below Running into defrosting under condition 3 defrosting time set is 10 min a Running into the first defrosting in 20 min after start up b The interval from last defrosting equivalent to or more than 50 min stopping the compressor or the machine in standby is allowed in the meantime Option 2 No Jumper JC and no OPT outdoor sensor when the compressor runs for 45 min if the indoor coil temperature is less than 40 C for 2 min the machine runs int
15. SHIVAKI WALL MOUNTED SPLIT TYPE AIR CONDITIONERS SERVICE MANUAL No TE121023 Models SSH 1304BE SRH 1304BE CONTENTS 1 IMPORTANT NOTICE m 2 2 TECHNICAL SPECIFICATION 3 3 WIRING DIAGRAM tnn 8 4 OPERATION DETAILS 9 5 EXPLOSION VIEW 17 6 PARISLIST 49 7 ANNEX 1 TROUBLE SHOOTING Air Conditioner Service Manual IMPORTANT NOTICE This service manual is intended for use by individuals possessing adequate backgrounds of electrical electronic and mechanical experience Any attempt to repair the appliance may result in personal injury and property damage The manufacturer or seller cannot be responsible for the interpretation of this information nor can it assume any liability in connection with its use The information specifications and parameter are subject to change due to technical modification or improvement without any prior notice The accurate specifications are presented on the nameplate label How to order spare parts To have your order filled promptly and correctly please furnish the following information 1 Model No with Indoor or Outdoor 2 No in the Explosion View 3 Part Name 4 The quantity you ordered Air Conditioner Service Manual Summary and features Panel 2 a For fixed type Models Remarks SSH I304BE SRH I304BE Fixed type 220 240V 50Hz Air Conditioner Service Manual Technical Specificat
16. ailures happens the PCB alarms and buzzer rings three times Failure code appears and the PCB operates protection procedures Air Conditioner Service Manual Failure code For the machine has LED the code displays on LED for no LED machine the code reflects by the running light Failure Running Light Flash LED Display RT Sensor Failure Once Period E1 IPT Sensor Failure Twice Period E2 Indoor Fan Motor Failure 6 times Period E6 When there is LED displaying failure code the code is displayed statically if there are several failure codes should be reported at the same time then failure codes appears one by one every eight seconds correspondingly a Sensors failure protection when the 5 temperature is out of the range 50 lt T lt 110 then sensor failue is determined Once RT IPT sensor failures appear the compressor stops and indoor and outdoor fan motors shut off Remote controller deesn t response to any signal except for shutdown During failure the machine can run in fan mode After the failure is settled the PCB restores to standby status b Failure protection of Indoor PG fan motor If there is no feedback signal of rotate speed within 5 the indoor fan motor stops at the same time the compressor outdoor fan moto four way valve and auxiliary electric heater etc cut downn 10 seconds later the indoor fan motor restarts once there is no feedback signal of rotate speed within 5
17. allowed if the length of the cord does not exceed 2m 1 2 Internal factors check E Operation switch Rotary switch Remocon Power supply Function parts Operation indicator lamp Relay reversing coil Conductor Thermistor 1 2 1 Insulation resistance Compressor Protector Motor Fan Pressure switch O L P Fuse Measure the insulation resistance between live part and dead metal part by 500V insulation resistor to check if the insulation resistance is more than 10 1 2 2 Insulation resistance measurement of compressor Measure the insulation resistance of compressor between compressor terminal and dead metal part by insu lation resistor and the insulation resistance should be above 10 Compressor may change the insulation resistance while running Accordingly measure the insulation resistance just after running as needed Note For R 22 used in airconditioner the dielectric rate on liquid state is high If a contaminant is mixed into R 22 the electric resistance is extremely low and the poor insulation is occurred Accordingly be sure to prevent contaminants from mixing into refrigerant system Air Conditioner Service Manual 1 2 3 Running capacitor 1 Earth inspection between terminal and body As shown in Figure 1 connect a resistor between one side terminal and body of condenser to check for continuity 2 Capacity inspection 1 Remove the lea
18. arts 38 Air Conditioner Service Manual Bad smells amp Gases Case 20 Factor Bad smells and gases delivered by drain line Troubles amp Bad smells and gases from outside Ex ditch are discharged from the system Causes Be careful not to be confused as if it s from the system Defect Details E Discharging bad smells amp gases Bad smells amp gases can be discharged through the drain hose from ditch etc Bad smells amp gases Guidelines Add trap on the drain line Bad smells amp gases are protected by the trap 39
19. d to changes in airflow speed the switch can only be made orderly and every grade of air flow speed runs 1 minute at least 4 Vane motor control run as set state 5 4 way valve control a Under heating mode the four way valve maintains well connected status including the compressor stops on set condition but except for the defrosting process b When the mode switches into the heating mode or start up four way valves will open 5 Seconds before the compressor starts while the mode exits from the heating mode or turn off the four way valve will close 2min after after the shut down the compressor 6 Defrosting function During defrosting once mode switch temperature setting signals received and the buzzer and display make response immediately but the other operations won t implemented until defrosting finished During defrosting the signals of on off timing sleep airflow speed ans swing will be responded but the airflow speed and swing should be in accordance with anti cold air rules Except the above signal processing during defrosting no other signals will be dealt with but only a loud buzz During defrosting electrical heating stops compulsively Defrosting enter and exit pragram Option 1 with jumper JC The condition of enter defrosting run into defrosting once any of condition 1 2 and 3 met Air Conditioner Service Manual Condition 1 As shown in figure 3 Defination The followings are all required to meet a I
20. d wire from both terminals of condenser to be checked 2 Contact both terminals of lead wire for 2 3 sec and discharge Be sure to perform to prevent the tester damage before measuring 3 After discharging contact both terminals of tester with the terminal of condenser to see the dial vibrating direction of resistor See Figure 2 There are three kinds of dial vibrating direction in tester and each vibrating direction and symptom is as follows A Normal Dial shakes instantaneously and returns to the original state immediately B Short Dial remains moved C Capacity consumed up Dial does not move at all Figure 1 Figure 2 1 2 4 Motor fan 1 Power off remove motor fan and test independently 2 Measure the resistance of main coil sub coil and control coil in motor 3 Use a good quality of capacitor in testing 4 Diagnose the following troubles by the independent test and replace motor a Motor is not started b 9 Motor rotation rises very slowly Bearing failure The shaft does not move Arc occurs in the motor inside wes Smoke emits from motor inside f Excessive noise Air Conditioner Service Manual Measuring main coil resistance White lt gt Black Black Measuring sub coil resistance Brown Black Measuring control coil resistance Red lt gt Black Red 1 2 5 Thermostat There are 3 kinds of thermostat malfunction 1 Leak of gas charged in sen
21. e is normally 3 10 Air Conditioner Service Manual Pressure measurement of low pressure side Indoor Unit High pressure Liquid side tube Outdoor Unit Closed Closed As shown in Figure above connect the manifold gauge to the low pressure gas side tube of condenser and mea sure the pressure 2 1 3 Symptoms and actions 1 Short of refrigerant The short of refrigerant appears in a slightly different symptom as 1 no refrigerant or 2 short of refrigerant 1 Symptoms 2 Judgement method 3 Actions The temperature difference of suction discharge air is 8 or less the running current is less than the rated current and the pressure of low pressure side is low These are symtoms changed by short of refrigerant Frost is formed from the capillary tube outlet to the evaporator inlet The suction pipe of compressor is not cold The temperature of suction pipe is similar to the outdoor temperature The pressure of low pressure side in cooling is 4kg cm2 G or less Surrounding temperature 30 or over Refrigerant oil comes out from the evaporator condenser connections and each welded portion Finding the gas leak place Find the gas leak area Check at balance pressure of 5kg cm2 G or over Charge refrigerant to the specified level Check for gas leak 2 Closing of refrigerant system 1 Symptoms 2 Judgement method If the refrigerant system of straine
22. flares by over fastening make gas leakages Causes And incompletely fastened nuts too Defect Details Damaged Flares by over fastening Incompletely fastened nuts gt 4 7 Indoor Side Guidelines W Fastening Torques of Flare Nuts Tube Dia mm 6 35 9 52 15 88 19 05 W Torque wrench is required for proper fastenings E Check gas leakages of 4 fastened points and welded Torques Kg Cm points with soap bubbles ctc 160 200 High pressure points amid compressor s running 350 450 Low pressure points amid compressor s not running 450 550 550 650 23 Air Conditioner Service Manual Leakage Drainage 1 5 Case 5 1 Indoors leveling Factor 2 Drain hose connecting Troubles amp Causes Water leaks caused by the inclined indoor unit and the drain hose s bad connecting Defect Details 1 Non leveled indoor 2 Mal linked drain hose Slanted Evaporator Horizon Drain pan 4 drainage 4 leaks Connect hoses with drain pan Guidelines E Indoors need to be leveled E Confirm the water draining is good or not by For a better drain the install plate may be poring water into the drain pan Med are qo TANT panis E Connecting parts of drain pan and hose should be well fixed with bond for waterproofing Install plate V Weight 24 Air Conditioner Service
23. igure 4 Defrosting process 7 Auxiliary Electric heating function 1 The default condition is automatic on off the electric heating function 2 The conditions of auxiliary electric heating all the following conditions must be met a the compressor runs for more than 3min b indoor fan runs normally c not in defrosting state d auxiliary electric heating is turned off for more than 30s e ST RT23 C f RT lt 22 g IPTs43 C 3 The conditions of stopping auxiliary electric heating any one of the following conditions met the state stops a the compressor stops b RT224 C c IPT248 C d indoor fan stops e running into sleeping function 5 Fan mode 1 Indoor fan motor control Air Conditioner Service Manual indoor fan motor is running at setting speed the speed is same as that of heating 2 Vane motor control running according to the setting 3 The outdoor unit is not working under fan mode 6 Sleeping mode 1 Under sleep mode the indoor fan motor is running at a low airflow speed except that the power light and sleep light are on timer light is on off according to the setting state running light is off LED is off after displaying 5min 2 Temperature control 1 From cool mode to sleep mode one hour later the operates Temp ST 1 another one hour later the operates Temp ST 2 after then unchanged 2 From heating mode to sleep mode one hour later the operates ST 1 another one hour la
24. ions S ae ss E CAN Electrical Data Power supply 220 240V 50Hz 1P 198 264 12 7 11 5 2715 2445 1357 5 Refrigerating System Refrigerant Charge R410A 1720g Rotary Compressor PA270G2CS 4MU1 GMCC Evaporator Hydrophilic amp Louver Fin Innergroover tube type 97 Condenser Louver or Corrugated Fin Innergroover tube type 7 Expansion device Capillary tube Defrosting system Microcomputer controlled reverse system Fan System Colne Indoor fan speed CO 8 Connections Net dimensions Indoor Packing dimensions Air Conditioner Service Manual Identification of Parts Air Intake Nos AirQutlet _ pun Louver Horizontal Adjustment Louver Charcoal Filter optional 7 Electrostatic Filter AirFilter Remote Controller Airintake gt Outdoor Unit DH Drain Hose gt NJ PN Note Condensate water drains
25. l intelligence Operation room fan may be off Motor driving circuit Relay output 14 Air Conditioner Service Manual 3 3 Compressor or outdoor fan does not operate at all Re input after power off Set the desired temperature of remocon to be lower by 2 C or over than room temperature and start the cooling operation Repeat running stopping at a short time period Does not operate at all Temperature sensor Thermistor and evaporator jolose check surface contact check open Clearance is needed 5mm Connector check Connector check Contact amp power Contact amp power Disconnection short circuit OLP High pressure switch check of connecting wire Low pressure switch check Electric wire connection Operation mode check for outdoor side dehumidifying check Compressor amp motor detail check Insulation resistance Coil resistance PCB assy check Capacitor capacity Compressor OLP Temperature sensing circuit Relay output 15 Air Conditioner Service Manual 3 4 Up down vane does not operate at all Vane bending structures interferance check Motor shaft assembly check constant torque is felt when rotating vane by hands the assembled condition is normal p 1i Connector check Disconnection short circuit malconnection Blower operating condition check
26. load is not increased 8 Too many persons are in room Cooling 9 The insulation of window gap is not wrong If there is no trouble from the above checks and also if there is no trouble on the electric appliances of airconditioner body it is assumed as refrigerant system failure a Set aircon to High cool run cooling for 15 min or more and measure the temperature difference of suc tion discharge air in indoor unit Adjust the wind direction so that wind is discharged to the front direction in the installed condition b Measure the voltage and current in running condition Measure the pressure of low pressure side in cooling condition If the temperature is low convert into the test switch 2 1 1 Temperature difference and current of suction discharge air in evaporator No temperature difference Gas leak almost Refrigerant 80 or less of rated current cycle closed Temperature difference of suction discharge air Running current measurement Temperature diff Under 8 Gas leak refrigerant cycle 80 or less of rated current closed bad compressor Temperature diff Under 8 Rated current or over Excessive refrigerant charging Temperature diff 8 C or over No refrigerant cycle trouble Temperature difference of suction discharge air Normally the temperature difference is based at 10 Actually the judgemnt criteria is 8 C because when the room humidity is high the
27. n quantity com pare the in and out air temperature after 15 m in Air out from com pressor s running lt Temp diff gt Cooling 8deg Heating 14deg E Detect the gas leakages before insulation tubing confirm new welded points 29 Air Conditioner Service Manual Cooling capacity 1 5 Case 11 Factor Spacing for the air flows in split type air conditioners amp Cooling capacity downs by bad air flows Defect Details 1 The space for air intake is too narrow 2 The space for air discharge is too narrow Guidelines E Ensure the distance needed for air flows W Bad air flows lead cooling capacity s drop The product may not run normally as the accumulated heat make compressor stop by protecting device s work like PTC 30 Air Conditioner Service Manual Cooling capacity 2 5 Case 12 Factor Spacing for the air flows in window type air conditioners 8 Cooling capacity downs bad air flows Defect Details 1 The space for air intake is too narrow 2 The space for air discharge is too narrow Closed air intake flow Closed air discharge flow Guidelines E Ensure not to disturb the air intake flows W Ensure not to disturb the air discharge flows The awning is recommended for a optimum cooling 31 Air Conditioner Service Manual Cooling capacity 3 5 Ca
28. o defrosting and lasts for 3min otherwise when the compressor runs for 120 min the machine runs into defrosting automatically and last for 10 min Option 3 No jumper JC but with OPT outdoor sensor When heating when the temperature of outdoor unit under heat exchange is lower than E C 4 C and the compressor runs for 45 min then the machine runs into defrosting and last for 10 min Option 4 When heating when the outdoor fan motor stopped but the compressor not stopped 12 Air Conditioner Service Manual accumulative total 30min then the machine runs into defrosting and last for 8 min if the accumulative total less than 30min but accord with one of the condition option 1 3 them the machine runs into defrosting at the option 1 3 and the accumulative tota time restarts from O Conditions for quitting defrostng 1 The quitting conditions for option 1 and option 2 the machine quits from defrosting if any one below condition met a Defrosring time is over b When it runs in defrosting for three minutes the IPT indoor coil temperature rises 15 C or above from the bottom point 2 The quitting conditions for option 3 When gt 20 C or defrosting for more than 10 min then quit from defrosting 3 Defrosting process shown in Figure 4 The indoor fan runs in anti cold wind mode Outdoor Fan 4 Valve Compressor Relay pe I 393 153 Defrostingtime 12min 195 1 5 F
29. off or in case of an accidently power cut the A C is able to retain and restore the original mode when being turned on or the power supply is resumed if the auto restart function activated power down after power on while if the auto restart fundction isn t activated the A C enters standby state Heat pump Mode Initial RT Initial ST Cooling RT226 C 23 C Dehumifying 26 C gt RT220 C 18 C Heating RT lt 20 C 23 C Cooling only Mode Initial RT Initial ST Cooling RT226 C 23 C Dehumifying 26 C gt RT220 C 18 C Ventilating RT lt 20 C Under automatic mode including from automatic converted into dehumidifying Dry mode when the temperature up and down signals from the remote controller is received the setting temperature ST adjusts correspondingly to the current room temperature plus or minus 1 C the automatic regulating temperature range is 2 C 2 Cooling mode 1 The control of the compressor a When RT ST21 C the compressor is running b When RT ST lt 1 C the compressor is off c When 1 CSRT ST lt 1 C the compressor keeps its original state 2 Outdoor fan motor and the compressor run simultaneously except for defrosting 3 The control of indoor fan motor a Indoor fan motor can operate by automatic low middle and high airflow speed circularly b Indoor fan motor s the automatic airflow speed control Indoor fan motor can operate by automatic as shown in
30. ontroller User can preset the remote controller type depending on the air conditioner type you have purchased as follows Press any button when the arrowhead flashes onthe frontof Cool Cooling Only isset Press any button when the arrowhead flashes onthe frontof Heat Heat Pump is set If yu don t press any button within 10 seconds the remote controlleris presetas Heat Pump automatically Note If the air conditioner you purchased 1 a Cooling Only one butyou presetthe remote controller as Heat Pump it doesn t bring any matter Butif the air conditioner you purchased is a Heat Pump one and you presetthe remote controller as Cooling Only then you CAN NOT preset the Heating operation with the remote controller Air Conditioner Service Manual Electronic controller 1 Automatic mode 1 Initial RT determines the working mode and mode is determined effective only once unless A C shut down then re started If from other modes switches to autoamatic mode including mode conversion after shutdown it should be that the compress stop more than 3 min then temperature judgement and automatic mode are conducted it can conduct immediately from fan mode switched to automatic the indoor fan stops three minutes later the response is made and start up Within 3 min the output as Showing the room temperature indoor fans starts or anti cold airflow the outdoor fan stops 2 With memory controller once being turned
31. plit vertical 5m horizontal 10m 3 0 HP 9 vertical 5m horizontal 10m PAC 3 5 Hp J vertical 5m horizontal 20m 34 Air Conditioner Service Manual Noise 1 2 Case 16 Factor Unstable installing units Ho amp Noise from the unstably installed parts and units Defect Details 1 Unstable installed outdoor unit 2 Released fittings and fasteners Indoor unit Slanted Guidelines E Install the unit balanced stably using specified legs etc E To prevent vibrations and noises fasten tightly all me Parallel the connecting parts for electric heater steam line aralle air duct line etc 35 Air Conditioner Service Manual Noise 2 2 Case 17 Factor Unstably fixed tubings HS amp Noise and vibration form the tubings Defect Details E Unstable fixing of surplus tubings will make vibrations and noises during the compressor s running Guidelines E Cut away the surplus tubings But if there are any surplus tubings left for some reasons be sure to fix them stably with fixing bands a Fixing band 36 Air Conditioner Service Manual Wiring mistake 1 2 Case 18 Factor Wiring in 3 phase electric power lines amp Major electrical problems not operating properly by bad wirings Defect Details 1 Not firmly fixed screws of electric power 2 Wiring mistake of fan s electric power lines lines It can be led to critical accidents
32. r or capillary tube is closed pressure drops at the outlet of closed area and refrigerant evaporates to form and attach dew or frost The running current is less than the rated current and the pressure of low pres sure side is lower than the normal If completely closed the pressure of low pressure side is to be Okg cm2 G as time goes by The same symptoms as the short of refrigerant appears and the same phenome non occurs even if refrigerant is sealed It takes 3 min or more for refrigerant to balance If running in the condition the temperature of discharge gas becomes higher the refrigerant oil is deteriorated and the life time may be affected Compressor motor may be burnt Air Conditioner Service Manual 3 Overcharge 1 Symptoms e The temperature difference of suction discharge air is 8 C or less the running current is higher than the specified current the pressure of low pressure side is high and the compressor and suction pipe are cold If running in the condition pressure switch activates at overload operation to make continuous operation impossible compressor is difficult to start and fuse or breaker is easy to be disconnected O Dischage the refrigerant By 3 5kg cm2G Y Charge refrigerant to the specified level Check for gas leak 2 Actions 4 Bad compression 1 Symptoms The temperature difference of suction discharge air is little the running current is less than the specified current
33. ring in a operating condi tion Input voltage V1 Usable voltage Product rating 10 Voltage drop Voltage gt Running voltage V3 Starting voltage V2 Time 2 Electric wire capacity The electric wire for airconditioner should have an allowable current more than the load current of the circuit and be able to control the voltage drop by the load current within 296 And it should be a thickness capable of keeping the voltage drop by a starting current within 1096 and espe cially for an airconditioner of single phase the voltage drop Flicker voltage by the starting currnet be within about 5 V1 V2 Voltage drop by the starting current of airconditioner Flicker voltage V1 V3 Voltage drop by the normal running current of airconditioner V1 V3 Vi V2 X 100 lt 2 B case 100 lt 5 A case 1 1 In case of using an airconditioner a low voltage area where power supply voltage is low especially the Flicker voltage due to inadequate wires may cause the fluorescent light to be off or may affect the other electric products So care should be taken to the wiring work Air Conditioner Service Manual 3 Wire thickness required Rated current appliance A Nominal cross sectional area mm Up to and including 6 Over 40 up to and including 63 For rated currents up to 3A a nominal cross sectional area of 0 5mm is only
34. rvice Manual 1 3 Compressor trouble diagnosis 1 3 1 Electrical troubles 1 Ground test Test single phase and three phase in the same manner 1 Shut off the power supply to product 2 Remove the wires connected to the compres sor terminal 8 Clean the compressor terminal and discharge suction pipe 4 Measure the resistance of discharge suction 4 pipe and each terminal by using a R x 1K p Ohm Meter scale of Ohm meter Rx1K b If dial moves remarkably the terminal is in ground state So replace the compressor 2 Wrong wiring check of compressor terminal Examine the wiring diagram of compressor terminal or the electric circuit diagram of product on the cover of compressor terminal to check if there is wrong wiring 3 Checking of wire disconnection or overload protector O L P operating condition This check is to see the wire terminal condition of motor inside and for a single phase compressor with O L P built in it identifies the O L P operating condition and wire disconnection 1 Shut off the power supply to product 2 Remove the wires connected to the compres sor terminal 3 After checking the ground state cool the compressor sufficiently at room temperature For single phase compressor 4 Measure the resistance of each terminal by Ohm meter R x 1K scale and if dial does not move compressor is in opened condition For three phase compressor 5 Measure the resis
35. s activated And the compressor indoor fan motor restores the original state 3 Overheating protection IPT 2 55 C the outdoor fan stops IPT 2 65 C the compressor stops indoor fan motor runs at high speed forcibly When IPT lt 48 C outdoor fan motor and the compressor open indoor fan motor restores the original state 4 Anti cold wind control in heating a When runing into the heating mode once the compressor fails to comply with the start up conditions the wind speed is regulated according to the coil temperature in 2 min including stopping the indoor fan motor 2 min later the indoor fan motor stops If the compressor starts up within 2 min then operating by Figure 5 Under heating process to close the compressor including the downtime protection the wind speed is regulated according to the coil temperature in 1min including stopping the indoor fan 41min later the fan is stoped forcibly b When the indoor fan motor running at a low speed wind and in anti cold wind operation once electric heating opens the vane immediately withdraws from the anti cold windy location and turn back to normal vane angle When electric heating closes indoor fan motor go on to run at low speed wind accordingly the vane turns to anti cold windy location Sel Speed Sel Speed mU Low Speed SUE amemus ButdoIp BC Stop the fan Figure 5 Anti cold Wind 2 The following table shows the fault protections When f
36. se 13 Factor Improper installation and awning for outdoor unit Troubles amp Causes Cooling capacity downs by improper air flows and awning Defect Details 1 The outdoor shut in a verandah does not work normally The air around the outdoor unit arise too high Verandah Guidelines B Discharged air should be outward and not E Establish a proper awning disturbed Living room 32 Air Conditioner Service Manual Cooling capacity 4 5 Case 14 Factor Using crushed tubes and changed tubes 8 Cooling capacity downs by the crushed tubes and changed tubes Defect Details 1 Crushed tube by improper bending works Crushed area 2 Changed tubing from specified tubes Not using proper tubes designed for each product Guidelines E To get a good shaped tube after bending E In changing air conditioning unit the tubes too use specified spring or bending tools should be changed with proper ones Spring for bending Bending tool 33 Air Conditioner Service Manual Cooling capacity 5 5 Case 15 Factor Long distance tubings Jrgunps amp Cooling capacity downs by long distance tubings Defect Details E installed too high beyond recommended height difference between indoor and outdoor unit Higher than recommended 1st floor Guidelines Recommending maximum distances between indoor and outdoor unit RAC S
37. sor part 2 Short of contact point 3 Wrong wiring Switch off at room temperature 18 30 turn carefully the knob of thermostat from 1 to 10 the number may be different or a figure be used according to model or reversely and click sounds After the sound is heard turn reversely to check again the click sounds If click sounds the thermostat is in normal If room temperature exceeds 30 test should be done after cooling by putting the sensor part of thermostat into a cold water container because the contact point is not opened If knob is turned but click does not sound remove the thermostat cover and examine the contact point The fused contact point should be replaced with a new thermostat If contact point is not closed despite of the sensor temperature being sufficiently high the gas at the sensor part may be leaked In this case replace the thermostat When replacing thermostat be sure to conduct after performing carefully as the above content 1 2 6 Thermistor Pull out the lead wire of thermistor terminal to test continuity Connect a tester to the terminal of thermistor and measure the resistance The resistance value varies according to the measuring condition and temperature so in order to vary temperature forcibly put water in cool the sensor part of thermistor and then measure the resistance and also measure in a condition that the sensor part of thermistor becomes warm by hands Air Conditioner Se
38. tance of each terminal by Ohm meter R x 1K scale and if dial does not move the wire between two terminals is disconnected Action Replace the compressor Single phase Three phase OLP may be operated by the following causes so be sure to find and remove the cause 1 Operation at low voltage 2 Defects of operation or starting device 3 Overheat of compressor motor due to the condensing coil closing condensing motor defects liquid line close or injection capillary close Air Conditioner Service Manual 1 3 2 Mechanical troubles 1 Not starting 1 Phenomenon Compressor is not started but the starting current continues to flow 2 Checking Check capacitor for a type where a capacitor for compressor starting or operating is used b If there is no trouble it is judged as lock due to the wear of compressor inside or the damage of lubricating device Replace the compressor 2 Poor compression 1 Phenomenon Compressor is at work but the cooling capacity is weak the pressure of high pressure side is low and the pressure of low pressure side is high 2 Cause Damage of valve in compressor inside damage of connecting rod or crank shaft or other internal leak 8 Checking a Stop and then start the condenser fan and if the pressure of high pressure side does not increase the compressor is bad b Measure the temperature of discharge pipe in compressor and if it is abnormally low temperature 50
39. temperature difference is small and when humidity is low it becomes large Air Conditioner Service Manual 2 1 2 Pressure and temperature of refrigerant Capillary Tube Indoor Side o gt o o gt Low pressure Gas side tube The pressure in normal condition shows the figure in the right side table but the pressure P1 of high pressure side tube is affected Compressor Outdoor Side Compressor Measuring place Pressure kg cm G greatly by the temperature change and about 16kg cm G in a low P1 About19 5 temperature condition indoor outdoor 21 30 2 About 5 0 The pressure fluctuation is affected by the tube length or insulation as well as temperature change so measure the pressure P2 of low pressure side for the trouble shooting of refrigerant system Trouble finding by pressure temperature gt Pressure Temperature Ca se Explanation than normal than normal Bad compression C kI Higher Compressor failure Bad revers ing Valve Higher Cooling load is small Current flows weakly Normal Liquid refrigerant suction High pressure is not Excessive refrigerant charging increased rapidly in early running stage Gas short Gas leak Current is low Lower Higher Closed Pipe internal Current is low Note The high low temperature is a figure converted into pressure The low pressure is normally 4 5 6 0kg cm G Temperatur
40. ter the operates Temp ST 2 after then unchanged 3 the machine will automatically shut up after running 8 hours under sleep mode Timer on start up and sleep mode are implemented at the same time and the sleep mode can not be functioned 7 Timing fuction The timing scale is between 1h to 12h the displayed time is shown by 1 hour as the unit 8 Emergency switch ON OFF 1 When stand by to operate by pressing the emergency switch as follows To Press the emergency switch in three seconds the buzzer rings once and to release the machine runs into cooling mode if to holding on the buzzer rings twince then the machine runs into heating mode while when the machine is on to press the emergency Switch the buzzer rings once and then the machine shut down 2 The machine is running mandatorily as the selected mode within 30min after emergency operation indoor fan motor is running in high speed and vane board is swinging The machine runs into automatic mode 30min later the selected mode unchanged the set temperature is 23 C rotate speed of indoor fan motor is automatic and vane board is swinging too 3 To press the emergency button when the machine operating then the machine runs into stand by state 4 Under emergency operation the Compressor s time lapse protection anti frosting protection in cooling Overheating protection in heating and sensor fault protection and defrost operate are effective 5 Under emergenc
41. the pressure of high pressure side is low and the pressure of low pressure is high Close service valve of high pressure side in condenser front seat and connect the manifold gauge to the service valve of low pressure side Close the valve If the dial of pressure gauge does not indicate Okg cm G or less by cooling in the con dition the compressor is judged as bad 2 Judgement method Outdoor Note If pressure gauge is near Okg cm G immediately stop the cooling Otherwise air flows into the refrigerating cycle or the compressor motor coating is taken off to cause the poor insulation So care should be taken Air Conditioner Service Manual 2 1 4 Summary of check items by cause Check item Suction discharge air Rated current Low pressure High pressure temp diff of evaporator Cause Cooling 8 C Heating 14 C Cooling Heating Cooling Heating Cooling Heating Short of refrigerant Capillary closing a part Outdoor heat exchanger e e contaminated Indoor heat exchanger contaminated Bad compressor 2 2 Precautions on repair 1 When discharging refrigerant from pipe or body the discharge outlet should direct the direction where nobody exists 2 Do not work near fire or flame 3 Work in a large space if possible and arrange the scaffold
42. ting parts Ceiling amp 49 49 68 68 48 49 48 E Drainage flows Drainage flows down down from the from incompletely hidden parts insulated parts Guidelines Completely insulate weak points like pipe connection and hidden parts Ceiling 8 Use designated i Hidden parts like behind insulations on pipe the ceiling is a weak point connecting parts too 27 Air Conditioner Service Manual Leakage Drainage 5 5 Factor Tubing and taping works against the waterdrops Case 9 Troubles amp Causes Water leaks by the waterdrops led by wrong tubing and taping works Defect Details 1 Pipe from upside lead waterdrops rain drainage etc into the room outdoor unit 2 Wrong taping direction lead waterdrops into the room too A Re wate ate a amp PL ES Outdoor unit Downward Guidelines Waterdrops E Make U trap against the waterdrop inflow Outdoor unit E tapings should be upward form downside Taping direction Indoor unit 28 Air Conditioner Service Manual Freon shortage Case 10 Factor Tube Extending and freon adding amp Cooling capacity downs by the freon shortage Defect Details 1 Not adding freon for extended tubings 2 Gas leakage on welded points for extending tubings Guidelines E Ensure to add freon after extending tubings For a simple check of proper freo
43. y operation once effective signal from remote controller is received then the machine exits form the emergency mode and operate according to the setting from remote controller 9 Auto restart function 1 The PCB retains the setting parameters in case of power off When the power supply is resumed the machine which has been started up the power off memory function is able to restore into the original running state automatically 2 To press the emergency button and power on and hold on 10 seconds exit from the power off memory function buzzer rings four tomes default no this function 10 Protection Troubleshooting functions 14 Air Conditioner Service Manual 1 Compressor s protection function a The PCB which has Power off memory function once this function is started up the compressor goes along 3min delay protection when power on If the PCB hasn t been started up this function even when the PCB is power on the compressor doesn t process 3 min delay function b Compressor s 3 min interval protection the compressor can t start up until 3 min later except for defrosting process c After the compressor started the 5 state isn t subject to the changes on in 3min 2 Anti frosting protection of indoor evaporator If IPT 0 C detected in consecutive 5 min compressor and outdoor motor stoped indoor fan motor runs at high speed forcibly IPT gt 5 detected 3min later then outdoor fan i
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