TECHNICAL DATA & SERVICE MANUAL SPLIT
Contents
1. Unit mm 2 DIMENSIONAL DATA SAP FR99EH SAP FTR129EH Unit mm 190 m e e Genter of tubing hole 74 975 4 places Wide tube 12 7 1 2 Narrow tube 6 35 1 4 2 Drain hose 226 10 3 PERFORMANCE DATA 3 1 Air Throw Distance Chart SAP FTR129EH Floor mounted Room air temp 27 C Fan speed High o Axis air velocity m s Vertical distance m N TNS 6 Axis air velocity N N y e Flap angle N p angie 60 N 0 1 2 3 4 5 6 7 Horizontal distance m Room air temp 20 C Fan speed High e Axis air velocity e Flap angle 1 0 Axis air velocity m s Vertical distance m 20 0 1 2 3 4 5 6 7 Horizontal distance m 11 SAP FTR129EH Ceiling mounted Room air temp 27 C Fan speed High Horizontal distance m Cayo 1 2 3 4 5 6 7 DES 6 Axis air velocity gE EE 1 zo e Fl2. 4 way valve Indoor fan Standby lamp Indoor heat exch coil temp Tc C 32 C Release of cold draft prevention NOTE 1 Refer to 5 7 Cold Draft Prevention 21 6 TROUBLESHOOTING 6 1 Check before and after troubleshooting AN WARNING Hazardous voltage can cause ELECTRIC SHOCK or DEATH Disconnect power or turn off circuit breaker before you start checking or servicing 6 1 1 Check power supply wiring Check that power supply wires are correctly connected to terminals Land N on the terminal plate in the indoor unit 6 1 2 Check inter unit wiring Check that inter unit wiring is correctly connected to the outdoor unit from the indoor unit 6 1 3 Check power supply Check that voltage is in specified range 410 of the rating Check that power is being supplied 6 1 4 Check lead wires and connectors in indoor and outdoor units Check that coating of lead wires is not damaged Check that lead wires and connectors are firmly connected Check that wiring is correct 22 6 2 Air conditioner does not operate 6 2 1 Circuit breaker trips or fuse blows A When the circuit breaker is set to ON it is tripped soon Resetting is not possible There is a possibility of ground fault Check insulation resistance If resistance value is 2MQ or less insulation is defective NO WARNING Set circuit breaker to OFF D Remove inter unit wi
3. if the pointer bounces to a great extent and then gradually returns to its original position The range of deflection and deflection time differ according to the capacity of the capacitor 33 8 1 Changing Address of Remote Control Unit in Indoor Unit If you are installing more than 1 indoor unit up to 2 in the same room it is necessary for you to assign each unit its own address so each can be operated by its own separate remote control unit You assign the addresses by matching the remocon address on the PCB of each indoor unit with the switch positions of its remote control unit To change address on PCB 1 Set the switch n 2 to off position on the address dip switch S01 see detail on figure PCB ASSY To change address on Remote Control Unit NB Once changed you cannot restore the original address 1 Remove the batteries before changing the address 2 Remove tab marked A to change the address of the remote control unit when is removed the address is automatically set to B 3 After inserting the batteries press ACL button NG A SN gt ACL button 34 SANYO Airconditioners Europe S r l Via Bisceglie No 76 20152 Milano Italy
4. 6 3 Some part of air conditioner does not operate 27 6 4 Air conditioner operates but abnormalities are observed 29 6 5 If a sensor is defective 31 7 CHECKING ELECTRICAL COMPONENTS 32 7 1 Measurement of Insulation Resistance 32 7 2 Checking Continuity of Fuse on PCB Ass y 33 7 3 Checking Motor Capacitor 33 8 MAINTENANCE 34 8 1 Changing Address of Remote Control Unit in Indoor Unit 34 1 SPECIFICATIONS 1 1 Unit Specifications SAP FR99EH 220 240 V 50 Hz 230 V See catalogue with the requested matching m h 400 Microprocessor C thermostat Wireless remote control unit ON OFF 24 hours amp Daily program 1 hour OFF 3 and Auto 1 Hi Manual Manual Washable Anti Mold High 51 Flare type 6 35 1 4 9 52 3 8 R22 or R407C Optional Optional Horizontal Vertical Narrow tube Wide tube Height Width Depth Height Width Depth Net Shipping DATA SUBJECT TO CHANGE WITHOUT NOTICE Performance Capacity Air circulation Controls Temperature controls Control unit Timer Fan speed Airflow direction Air Filter Operation Sound Refrigerant tubing connections Refrigerant tube diameter Refrigerant Refrigerant tube kit Air clean filter Dimensions amp Weic Unit dimensions Package dimensions Weight Shipping volume SAP FTR129EH 220 240 V 50 Hz Voltage rating 230 V Performance Capacity See catalogue with the requested matchi
5. Set speed Set speed 5 5 Compressor Overcurrent Protection Cooling Dry and Heating This function prevents the compressor from being damaged by overcurrent When the compressor current exceeds either H1 A for 2 seconds or H2 A for 8 seconds both compressor and outdoor fan stop Trip At the same time operation lamp in front of the indoor unit flashes 6 After 3 minutes this function automatically releases and resumes operation until tripping repeats 8 times If the tripping repeats 9 times or more the unit stops its operation 2 Me v Trip H1 A Compressor current A H2 A 6 sec i 7 sec 11 sec The compressor current shown as H1 and H2 in the chart differ by models 9000 BTU h 12000 BTU h o o 16 22A 7A 10A 17 5 6 Overload Prevention Heating Overload prevention prevents overheating of the indoor heat exchange coil This function works either when the temperature of indoor heat exchange coil goes up or compressor current rises to a certain level E Temperature of indoor heat exchange coil sensor When the temperature of the indoor heat exchange coil rises above A2 C and if the indoor fan is L low speed then the fan speed changes from L low speed to M medium speed Vhen the temperature of the indoor heat exchange coil rises above A1 C the outdoor fan stops A1 A2 Indoor heat exch coil temp C A4 Outdoor fan ON OFF ON Indoor fan Hor
6. 185 DATA SUBJECT TO CHANGE WITHOUT NOTICE XR129EH SA Microprocessor SAP FTR129EH Controller PCB Part No Controls Control circuit fuse 250 V 3 15 A Remote Control Unit RCS 6HPS4E G Cross flow 2 130 L 180 K48407 M01596 1 4 1160 21 0 29 65 GRY WHT 298 343 WHT PNK 421 485 WHT VLT 93 5 108 VLT ORG 93 5 108 ORG YEL 211 243 Thermal protection 145 5 Automatic Synchro motor M2LJ24ZE31 AC 208 230 V 50 60 Hz 8 2 5 3 2 5 3 16 45x1596 Aluminium plate fin Copper tube 2 1 8 0 192 DATA SUBJECT TO CHANGE WITHOUT NOTICE Fan amp Fan Motor Dia and lenght Fan motor model Q ty No of poles rpm 230 V High Nominal output Running Amps Power input Coil resistance Ambient temp 25 C Safety devices Type Operating temp Open Close Run capacitor Flap Motor Type Model Rating No of poles rpm Nominal output Coil resistance Ambient temp 25 C Heat Exch Coil Coil Rows Fin pitch Face area 1 3 Other Component Specifications SAP FR99EH SAP FTR129EH ATR J105 Primary AC 230 V 50 60 Hz Secondary 19 V 0 526 A Capacity 10 VA Coil resistance Q at 21 C Primary WHT WHT 205 10 Secondary BRN BRN 2 Thermal cut off temp 150 C Thermistor Coil sensor TH1 Resistance KO Thermistor Room sensor TH2 Resistance KO
7. ECIAL PRECAUTIONS During installation connect before the refrigerant system and then the wiring one proceed in the reverse orden when removing the units MES wren wiring ELECTRICAL SHOCK CAN CAUSE SEVERE JAN PERSONAL INJURY OR DEATH ONLY A QUALIFIED EXPERIENCED ELECTRICIANS SHOULD ATTEMPT TO WIRE THIS SYSTEM lt Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked to ensure the grounding Highly dangerous electrical voltages are used in this system Carefully refer to the wiring diagram and these instructions when wiring Improper connections and inadequate grounding can cause accidental injury and death Table of Contents Page 1 SPECIFICATIONS 4 1 1 Unit specifications 4 1 2 Major Component specifications 6 1 3 Other Component specifications 8 2 DIMENSIONAL DATA 9 3 PERFORMANCE DATA 11 3 1 Air Throw Distance Chart 11 4 ELECTRICAL DATA 13 4 1 Electric Wiring Diagrams 13 5 FUNCTION 14 5 1 Room Temperature Control 14 5 2 Dry Operation Dehumidification 16 5 3 Automatic Switching between Cooling and Heating 16 5 4 Freeze Prevention Cooling and Dry 17 5 5 Compressor Overcurrent Protection Cooling Dry and Heating 17 5 6 Overload Prevention Heating 18 5 7 Cold Draft Prevention Heating 19 5 8 Defrosting Operation Heating 20 6 TROUBLESHOOTING 22 6 1 Check before and after troubleshooting 22 6 2 Air conditioner does not operate 23
8. MorL H gt H MOM L M Compressor ON NOTE The operation temperature shown as A1 A2 A3 and A4 in the chart differ by models 9000 BTU h 12000 BTU h A1 58 C A2 56 C A3 50 C A4 46 C Compressor current detection When the compressor current rises above B1 A and if the indoor fan is L low speed then the fan speed changes from L low speed to M medium speed At the same time the outdoor fan stops its operation When the compressor current drops to B2 A the outdoor fan resumes its operation When the compressor current drops below B3 A indoor fan returns to operate in set speed Compressor B1 current A B2 B3 Outdoor fan ON OFF ON Indoor fan HorMorL H gt H MOM LM Compressor ON NOTE The compressor current shown as B1 B2 and B3 in the chart differ by models 9000 BTU h 12000 BTU h B1 6 5A 9 5A B2 44A 6 5A B3 44A 6 5A 18 5 7 Cold Draft Prevention Heating This function controls indoor fan speed so a strong draft of cold air will not blow out before the indoor heat exchange coil have sufficiently warmed up STANDBY lamp on front of the indoor unit lights up when this function is working 6 Indoor fan operates in LL until indoor heat exchange coil temperature reaches 32 C 6 In case of after releasing the defrosting indoor fan halt its operation until the coil temperature r
9. Replace the thermistor NOTE Alarm Signal Operation lamp on the front side of the indoor unit will flash on and off when either indoor coil thermistor or room air thermistor is defective At the same time the outdoor unit will stop Indoor unit will operate only for ventilation 31 7 CHECKING ELECTRICAL COMPONENTS power plug Local supply Re Insulation tester The shape of the power plug may differ from that of the air conditioner which you are servicing Fig 1 Terminal plate olle Clip Copper tube or metallic part Fig 2 Clip Copper tube or metallic part Insulation tester Fig 3 From fan motor compressor and other parts P sd ng Il b Metallic ES part A Clip i x gt 4 jo O li Insulation tester Fig 4 7 1 Measurement of Insulation Resistance The insulation is in good condition if the resistance exceeds 2MQ 7 1 1 Power Supply Wires Clamp the grounding terminal of the power plug with a lead clip of the insulation resistance tester and measure the resistance by placing a probe on either of the two power terminals Fig 1 Then also measure the resistance between the grounding and other power terminals Fig 1 7 1 2 Indoor Unit Clamp a metallic part of the unit with the lead clip of the insulation resistance tester and measure the resistance by placing a probe on each terminal screw where power suppl
10. TECHNICAL DATA S O amp SERVICE MANUAL INDOOR UNIT SAP FR99EH SAP FTR129EH SPLIT SYSTEM AIR CONDITIONER SAP FR99EH 1 85208179 SAP FTR129EH 1 85208181 SAP FR99EH Floor Mounted SAP FTR129EH Ceiling Mounted 0 8180 279 0 07 2002 SM940013 Ground the unit following local electrical codes The Yellow Green wire cannot be used for any connection different from the ground connection Connect all wiring tightly Loose wiring may cause overheating at connection points and a possible fire hazard lt Do not allow wiring to touch the refrigerant tubing compressor or any moving paris of the fan lt Do not use multi core cable when wiring the power supply and control lines Use separate cables for each type of line When transporting Be careful when picking up and moving the indoor and outdoor units Get a partner to help and bend your knees when lifting to reduce strain on your back Sharp edges or thin aluminium fins on the air conditioner can cut your fingers When installing In a ceiling or wall Make sure the ceiling wall is strong enough to hold the unit weight It may be necessary to build a strong wooden or metal frame to provide added support In a room Properly insulate any tubing run inside a room to prevent sweating which can cause dripping and water damage to walls and floors In moist or uneven locations Use a raised concret
11. ap angle 5 O 2 i D DN ag s 8 3 NR Um o N o gt gt 45 Room air temp 20 C Fan speed High Horizontal distance m 2 70 1 2 3 4 5 6 7 6 Axis air velocity 5 5 8 e Flap angle E 0 gt 38 A co 3 N 25 NRE lt gt 1 80 12 SUPPLY OUTDOOR POWER UNIT TH2 ROOM BLK WHT GRN YEL BLK BRN RED BLU GRN YEL WHT WHT SAP FTR129EH CONTROLLER 13 4 ELECTRICAL DATA 4 1 Electric Wiring Diagrams SAP FR99EH GRN YEL gt SE GRN YEL BLK BLK BLK BLK WHT e 5 FUNCTION 5 1 Room Temperature Control Cooling Room temperature control is obtained by cycling the compressor ON and OFF under control of the room temperature sensor in the remote control unit The room temperature and other information is transmitted every 5 minutes by the remote control unit to the controller in the indoor unit Signal from remote control unit 5 minutes 5 minutes 5 minutes 5 minutes 5 minutes 5 minutes 5 minutes Thermo Thermo Thermo Thermo Thermo Thermo Thermo OFF ON OFF ON ON ON xn a T 1 C settemp T C 4 wy L aa aaa e More than 5 minutes 5 minutes ee or Set speed 3 minutes Room temp OFF N Ton Compressor OFF Outdoor fan OFF AM li Ind
12. e base to provide a solid level foundation for the outdoor unit This prevents damage and abnormal vibrations In area with strong winds Securely anchor the outdoor unit down with bolts and a metal frame Provide a suitable air baffle In a snowy area for heat pump type systems Install the outdoor unit on a raised platform that is higher than drifting snow Provide snow vents When connecting refrigerant tubing Keep all tubing runs as short as possible Use the flare method for connecting tubing Apply refrigerant lubricant to the matching surfaces of the flare and union tubes before connecting them screw by hand and then tighten the nut with a torque wrench for a leak free connection Check carefully for leaks before starting the test run NOTE Depending on the system type liquid and gas lines may be either narrow or wide Therefore to avoid confusion the refrigerant tubing for your particular model is specified as narrow tube for liquid wide tube for gas When servicing Turn the power OFF at the main power board before opening the unit to check or repair electrical parts and wiring Keep your fingers and clothing away from any moving parts Clean up the site after the work remembering to check that no metal scraps or bits of wiring have been left inside the unit being serviced Ventilate the room during the installation or testng the refrigeration system make sure that after the installati
13. each 32 C When the coil temperature rises above Tc C indoor fan operates in set speed Max 10minutes Tc Indoor heat exch coil temp C Indoor fan Set speed OFF or Standby lamp ORBE Release of cold draft prevention NOTE The operation temperature shown as Tc in the chart differs by models uu 9000 BTU h 12000 BTU h 19 5 8 Defrosting Operation Heating Reverse cycle Defrosting Defrosting Sequence Heating Operation compressor 4 way valve Frost Detection Frosting is assumed mostly under the following condition indoor heat exchanger coil temperature drops 0 8 c per 6 minutes and it repeats 3 times in succession integrated operating time of compressor is longer than 3 hours temperature of indoor heat exchanger coil immediately before thermo goes off is below Td 5 6 C etc NOTE The values shown as Td differs according to the models 9000BTUNh 12000 BTU h Reverse cycle defrosting operation compressor ON outdoor fan OFF 4 way valve OFF indoor fan cold draft prevention mode Releasing of defrosting Defrosting operation lasts 8 to 12 minutes max compressor current during reverse cycle defrosting operation exceeds certain ampere 20 Defrosting Mode Timing Chart Start of defrosting Release of defrosting 4 4 60 seconds Max 8 to 12 minutes 60 seconds Compressor Outdoor fan Solenoid coil
14. ice by hand Fan motor burnout gt or foreign matter in Repair or replace bearings Measure resistance of outdoor fan motor winding OK Check fan motor capacitor 27 6 3 4 Only compressor does not run Check compressor motor Overload relay is working capacitor C1 Either OLR T or OLR A YES Measure resistance of Temperature of compressor compressor motor winding is abnormally high YES Y YES Refrigerant gas shortage Charge refrigerant gas R22 NO Y Measure Power supply voltage Rotor may be locked up The voltage is too low 28 6 4 Air conditioner operates but abnormalities are observed 6 4 1 Operation does not switch from HEAT to COOL or COOL to HEAT Remote control unit may be defective Receiver in lamp Ass y may be defective Measure resistance of 4 way valve s winding COOL HEAT Check voltage between terminals No 1 and No 4 at the terminal plate AC 220 240V No voltage appears Indoor PCB Ass y is defective HEAT COOL Check voltage between terminals No 1 and No 4 at the terminal plate 0V 29 Change position of remote control unit Insulate both wide and narrow tubes separately and then 6 4 2 Poor cooling or heating Check position of
15. ition NO Set OPERATION selector switch to ON Measure resistance of indoor and outdoor fan motor winding on Measure resistance of compressor motor winding CM es Measure resistance of 4 way valve s winding OK Replace the fuse FM PR gt Cancel the timer mode gt Clean transmitter gt Clean receiver If fuse has been blown 25 First remote control unit is defective Measure resistance of primary and TR C Check remote control unit Try to run with another remote control unit Check for residue buildup on transmitter of remote control unit Check for residue buildup on remote control receiver on front of indoor unit D Check fuse on the indoor PCB Ass y Check fuse on indoor PCB Ass y for continuity F Check operation lamp to see if light is ON Light is OFF secondary winding of transformer Indoor PCB Ass y is defective E Check TIMER on the remote control unit YES Timer is turned ON Check to see if ON O or is displayed on remote control HEAT Is room temperature too high Try to raise setting temperature by temperature setting button button Outdoor unit still does not run Try to run usi
16. ng m h 700 Air circulation Microprocessor C thermostat Wireless remote control unit Timer ON OFF 24 hours amp Daily program 1 hour OFF Fan speed 3 and Auto 1 Hi Airflow direction Horizontal Manual Vertical Auto Air Filter Washable Anti Mold Operation Sound High 55 Refrigerant tubing connections Flare type Controls Temperature controls Control unit Refrigerant Narrow tube in 6 35 1 4 tube diameter Wide tube in 12 7 1 2 R22 or R407C Refrigerant Optional Optional Refrigerant tube kit Air clean filter Dimensions amp Weight Unit dimensions Height Width Depth Package dimensions Height Width Depth Weight Net Shipping Shipping volume DATA SUBJECT TO CHANGE WITHOUT NOTICE 1 2 Major Component Specifications SAP FR99EH Controller PCB Part No XR99EH SA Controls Microprocessor Control circuit fuse 250 V 3 15 A Remote Control Unit RCS 6HPS4E G Fan amp Fan Motor Cross flow Dia and lenght 1 100 L 410 Fan motor model Q ty K35406 M01892 1 No of poles rpm 230 V High 4 1196 Nominal output 27 Running Amps 0 12 Power input 26 Coil resistance Ambient temp 25 C GRY WHT 545 630 WHT VLT 92 105 VLT YEL 62 771 GRY BRN 78 90 Safety devices Type Thermal protection Operating temp Open 150 x 10 Automatic Run capacitor 1 450 Heat Exch Coil Aluminium plate fin Copper tube 1 1 4 Face area 0
17. ng another remote control unit OK Remote control unit is defective 26 6 2 3 Only outdoor unit does not run A Check setting temperature COOL ls room temperature too low Try to lower setting temperature by temperature setting button button Outdoor unit still does not run Try to run using another remote control unit Remote control unit is defective 6 2 4 Only Indoor unit does not run Indoor PCB Ass y is defective 6 3 Some part of air conditioner does not operate 6 3 1 Only indoor fan does not run Check fan casing gt foreign matter on gt inside Remove foreign matter or repair Fan cannot e Check fan rotation be turned Turn fan gently once or twice by hand Fan motor burnout o or foreign matter in gt Repair or replace bearings When fan speed is changed does applied voltage between lead wires BRN and WHT change as well Measure resistance of indoor fan motor winding OK Check fan motor capacitor PCB Ass y is defective 6 3 2 Only flap motor does not run Measure resistance of flap motor winding 6 3 3 Only outdoor fan does not run Check fan casing gt foreign matter on gt inside Remove foreign Fan cannot matter or repair e Check fan rotation be turned Turn fan gently once or tw
18. o turn the compressor ON until the compressor has been OFF for at least 5 minutes To protect the compressor from stalling out when trying to start against the high side refrigerant pressure the control circuit has a built in automatic time delay to allow the internal pressure to equalize As a protective measure the control circuit switches the compressor OFF after 5 minutes or more of compressor operation Thermo ON When the room temperature is below T 1 C T C is set temperature Compressor ON Thermo OFF When the room temperature is equal to or above set temperature T C Compressor OFF NOTE 1 Refer to 5 7 Cold Draft Prevention 15 5 2 Dry Operation Dehumidification Dry operation uses the ability of the cooling cycle to remove moisture from the air but by running at low level to dehumidify without greatly reducing the room temperature The air conditioner repeats the cycle of turning ON and OFF automatically as shown in the chart below according to the room temperature Room temp Cooling operation T 2 C Dry A zone Compressor Continuous operation FMI indoor fan L low speed LL very low speed intermittent ventilation Set temp T C only while the compressor is ON TA C Dry B zone Compressor Intermittent operation ON for 3 minutes and OFF for 9 minutes FMI indoor fan L low speed LL very low speed intermittent ventilation only while the compresso
19. on no gas leaks are present because this could produce toxic gas and dangerous if in contact with flames or heat sources IMPORTANT Please read before installation This air conditioning system meets strict safety and operating standards For the installer or service person it is important to install or service the system so that it operates safely and efficiently For safe installation and trouble free operation you must Carefully read this instruction booklet before beginning Follow each installation or repair step exactly as shown Observe all local state and national electrical codes Pay close attention to all warning and caution notices given in this manual The unit must be supplied with a dedicated electrical line AN EN This symbol refers to a hazard or unsafe practice which can result in severe personal injury or death N CAUTION This symbol refers a hazard or unsafe practice which can result in personal injury or product or property damage If necessary get help These instructions are all you need for most installation sites and maintenance conditions If you require help for a special problem contact our sale service outlet or your certified dealer for additional instructions In case of improper installation The manufacturer shall in no way be responsible for improper installation or maintenance service including failure to follow the instructions in this document SP
20. oor fan The control circuit will not attempt to turn the compressor ON until the compressor has been OFF for at least 3 minutes To protect the compressor from stalling out when trying to start against the high side refrigerant pressure the control circuit has a built in automatic time delay to allow the internal pressure to equalize As a protective measure the control circuit switches the compressor OFF after 5 minutes or more of compressor operation Thermo ON When the room temperature is above T 1 C T C is set temperature Compressor ON Thermo OFF When the room temperature is equal to or below set temperature T C Compressor OFF 14 Heating Room temperature control is obtained by cycling the compressor ON and OFF under control of the room temperature sensor in the remote control unit The room temperature and other information is transmitted every 5 minutes by the remote control unit to the controller in the indoor unit Signal from remote control unit More than 5 minutes 5 minutes 5 minutes 5 minutes 5 minutes 5 minutes 5 minutes Thermo Thermo Thermo Thermo ON OFF ON OFF Ci pa aa en EE minutes 5 minutes Room temp orr Outdoor fan Indoor fan Set speed Indoor heat exch 5 coil temp 2 Tc C Pa Solenoid coil 4 way valve OFF ON Reversing cycle Operation button OFF ON 6 The control circuit will not attempt t
21. r is ON Room temp 15 CAA Monitor zone Both the indoor and outdoor units stop NOTE 6 Intermittent ventilation occurs by switching the indoor fan speed between L gt LL Dry operation does not occur when the room temperature is under 15 C which is the monitor zone When the compressor stops the indoor fan stops as well 5 3 Automatic Switching between Cooling and Heating When AUTO mode is selected the microprocessor calculates the difference between the set temperature and the room temperature and automatically switches to COOLING or HEATING mode to maintain the desired temperature Room temp gt Set temp COOL Room temp gt Set temp HEAT This means that if the room temperature is higher than or equal to the set temperature COOLING operation begins If the room temperature is lower than the set temperature HEATING operation begins 16 5 4 Freeze Prevention Cooling and Dry This function prevents freezing of the indoor heat exchange coil When the compressor has been running for 6 minutes or more and the temperature of the indoor heat exchange coil falls below 2 4 C the control circuit stops the compressor for at least 6 minutes The compressor does not start again until the temperature rises above 8 C or 6 minutes has elapsed Thermo OFF Room temp Thermo ON T 1 C Set temp T C M h Indoor heat exch 6 IRE coil temp 2 4 C More than 6 minutes Indoor fan
22. remote control unit YES Cool or warm air from air conditioner reaches position directly Wide and narrow tubes between indoor unit and outdoor unit are insulated tape together YES Temperature difference Measure temperature of suction and is small Possibility of Charge refrigerant discharge air of air conditioner gas shortage gas Clean filter Set fan speed to either HIGH or MEDIUM Reduce cooling or heating load or replace the air conditioner with larger capacity Set temperature to higher or lower value using temperature setting buttons of the remote control unit Change position of remote control unit Temperature difference between suction and discharge air is large enough approx 10 deg or more Check for clogging of air filter Air filter is clogged YES Fan speed is set to LOW Review cooling load estimate if performance of air conditioner is normal 6 4 3 Excessive cooling or heating NO Set temperature is suitable Remote control unit is placed where it can detect room temperature properly 30 6 5 If a sensor is defective 6 5 1 Thermistor TH1 or TH2 is defective Operation lamp on front side of YES Indoor coil thermistor TH1 or room indoor unit is flashing on and off air thermistor TH2 is defective YES
23. res from NO Insulation of terminal plate in outdoor unit outdoor unit Measure insulation resistance is defective of outdoor unit Measure insulation resistance of electrical parts in outdoor unit 2 Remove inter unit wires from terminal plate in indoor unit Insulation of NO Then pull the power plug out of gt indoor unit the wall outlet is defective Measure insulation resistance of indoor unit Measure insulation resistance of electrical parts in indoor unit 23 is tripped gt Reset breaker B Circuit breaker trips in several minutes after turning the air conditioner on 6 There is a possibility of short circuit Check capacity of circuit breaker Replace with suitable Capacity of circuit breaker is one larger capacity suitable In case of Heating operation Measure resistance of outdoor fan Measure resistance of 4 way valve s motor winding winding Measure resistance of compressor motor winding 6 2 2 Neither indoor nor outdoor unit runs A Power is not supplied Circuit breaker Check power supply Power is being supplied to the indoor unit Wait for recovery or contact power company Power failure B Check OPERATION selector switch in the indoor unit gt Indoor PCB Ass y is defective 24 OPERATION selector switch is set YES in ON pos
24. y lines are connected on the terminal plate Fig 2 7 1 3 Outdoor Unit Clamp an aluminum plate fin or copper tube with the lead clip of the insulation resistance tester and measure the resistance by placing a probe on each terminal screw on the terminal plate Fig 2 Note that the ground line terminal should be skipped for the check 7 1 4 Measurement of Insulation Resistance for Electrical Parts Disconnect the lead wires of the desired electric part from terminal plate capacitor etc Similarly disconnect the connector Then measure the insulation resistance Figs 3 and 4 NOTE Refer to Electric Wiring Diagram If the probe cannot enter the poles because the hole is too narrow then use a probe with a thinner pin 32 Fuse PCB Ass y D Fig 5 Fig 6 Fig 7 Fuse Multimeter Fan motor capacitor V ri Compressor motor capacitor 7 2 Checking Continuity of Fuse on PCB Ass y Remove the PCB Ass y from the electrical component box Then pull out the fuse from the PCB Ass y Fig 5 Check for continuity using a multimeter as shown in Fig 6 7 3 Checking Motor Capacitor Remove the lead wires from the capacitor terminals and then place a probe on the capacitor terminals as shown in Fig 7 Observe the deflection of the pointer setting the resistance measuring range of the multimeter to the maximum value The capacitor is good
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