TopPage SERVICE MANUAL S6721AEXM24HRT MULTI SPLIT TYPE ROOM AIR CONDITIONERS OUTDOOR UNIT MODELS AE-XM24HR In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used. CONTENTS CHAPTER 1. SPECIFICATION [1] SPECIFICATION............................................ 1-1 [2] EXTERNAL DIMENSION............................... 1-2 [3] CAPACITY TABLE ...........................
AEXM24HR CHAPTER 1. SPECIFICATION AEXM24HR Service Manual [1] SPECIFICATION MODEL ITEMS Cooling capacity 4-INDOOR OPERTION Heating capacity 4-INDOOR OPERTION Moisture removal (at cooling)✩ Electrical data Phase Rated frequency Rated voltage Rated current Rated input ✩ (Min. - Max.
AEXM24HR [2] EXTERNAL DIMENSION 150 150 590 361 383 75 51.3 16 940 890 50 37 320 Figure OUTDOOR UNIT ˴ [3] CAPACITY TABLE 1.
AEXM24HR 2. COOLING CAPACITY TABLE Operating Status 4Room 3Room 2Room 1Room Combination of Indoor Units Cooling Capacity (kW) A B C D A B C D 09 12 09 12 09 09 07 09 12 12 09 09 07 12 12 09 09 07 12 09 07 09 09 09 07 09 07 07 09 09 07 09 07 07 09 07 09 07 07 OFF OFF OFF 09 07 09 07 07 07 07 09 07 07 07 07 07 OFF OFF OFF OFF OFF OFF OFF OFF 09 07 07 07 07 07 07 OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF 1.75 2.40 1.85 2.55 1.97 2.10 1.75 2.27 2.91 3.14 2.45 2.50 1.97 3.20 3.
AEXM24HR [5] WIRING DIAGRAMS 1.
from DC FAN MOTOR from 4-WAY VALVE from IPM PWB 1–5 from THERMISTOR COMP.TEMP. COMP.T HEAT EXCHANGER TEMP OUT DOOR TEMP. SUCTION TEMP. from EXPANSION VALVE A from EXPANSION VALVE B from EXPANSION VALVE C from EXPANSION VALVE D from THERMISTOR (SUCTION) Figure CONTROL P.W.B and DISPLAY P.W.
AEXM24HR 3. PRINTED WIRING BOARD from CONTROL PWB CN14 from ELECTROLYTIC CAPACITOR C10(+) from ELECTROLYTIC CAPACITOR C10(-) from COMPRESSOR TERMINAL W "ORANGE" from COMPRESSOR TERMINAL U "RED" from COMPRESSOR TERMINAL V "WHITE" from CONTROL PWB BCN1 figure IPM P.W.
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AEXM24HR Manual CHAPTER 2.
AEXM24HR [2] FUNCTION 1. OUTDOOR UNIT if the temperature of any of indoor heat exchangers exceeds the overheating prevention line 1 or 2 during heating, the operating 1.1. FREQUENCY CONTROL frequency is lowered by approximately 5 to 15Hz. (1) AC current peak control AE-XM24HR After that , the frequency is lowered approximately 5Hz once every Cooling mode 16.5A Heating mode 16.5A 60 seconds or approximately 15Hz once every 90 seconds.
AEXM24HR compressor is stopped, if the temperature is below 85°C,another When the indoor unit of a room requests for the cooling operation to starting try will be made. Three retries are allowed.
AEXM24HR More than 20 min. More than 20 min. Heating operation start Defrosting Max. 10 min. More than 20 min. Defrosting Max. 10 min. (3) During defrosting When defrosting begins, the compressor stops. Approximately 1 minutes later, the compressor reactivates in the refrigeration cycle, and the outdoor heat exchanger is defrosted. Each mode is as follows: The outdoor fan is stopped The operating frequency is as shown in the table below The indoor fan is stopped All expansion valve are open.
AEXM24HR 2. Active Filter Circuit This circuit uses active filter and IPM as the figure below for the high efficiency operation of compressor. Active filter Choke coil Rectification circuit AC + Noise filter circuit Comp ressor IPM Sine wave current ON/OFF Voltage raise signal Compressor Driving signal Control source Positional detection IPM Control source IC1 2.1.
AEXM24HR L + DB D Control Ei + Vs IC RL Vo C IGBT - L1 (+) L2 P (-) Io PFC control 1 2 3 4 5 6 BCN13 Active Filter Circuit 2.3. Active Filter Driving Electronics Circuit At the operation of compressor, the microcomputer (IC1), as the 50th pin gets “H”, will turn the transistor Q4 ON through the transistor Q3. By this, 18V is supplied to the 3rd pin of connector BCN13 of the active filter and the active filter will be turned ON. 2.4.
AEXM24HR 1. Brief explanation of bootstrap system (single power drive system) To supply power to the upper-phase IC, the microcomputer (IC1) turns ON the lower-phase IGBT (LU, LV, LW). It results in a charging current that flows through the electrolytic capacitor in each upper-phase IC input and charges the bootstrap capacitor up to 15V voltage. The power supply for the subsequent stages is stored when the lower-phase IGBT is ON in common drive control of the compressor.
AEXM24HR microcomputer works in an internal processing so that detection is enabled only when it is ON. Based on the position signal detected, actual PWM waveform output timing is determined. Since it does not use a filter circuit, the accuracy of detection. The microcomputer works in an internal processing to eliminate spiky voltage during the regenerative process.
AEXM24HR IPM FUSE 101 250V 20A P S FC1 C121 630v 0.33Ǵ TU TV TW C R N CIN C119 1000p R201 100KF ZD101 R113 18KF R100 0.015 5V Z D8 15V 8 1 IC1 C96 1000P Y R200 1K C97 0.1μ 4 2 + 3 IC9 0V Inverter current detection circuit R202 20KF R203 2.
CHAPTER 3. FUNCTION AND OPERATION OF PROTECTIVE PROCEDURES [1] PROTECTIVE FUNCTIONS AND OPERATIONS FUNCTION AND OPERATION OF PROTECTIVE PROCEDURES NO. Function Operation Description Detection time Restart condition Restarts time 1 DC over current Compressor is stopped if a current approximately 50A or more flows in the power transistor module.
NO. Function 8 AC abnormal current Operation Description Detection time Compressor is stopped, if the oper- During ating frequency is above 70Hz and compressor the compressor current is below operation 0.8A. Restarts condition Restarts In Out time door door Automatically re4 times Yes starts after safety time (180 seconds) Yes During 9 Serial signal INDOOR error If open, while timer LED blinks, op- operation eration is continued. If short, operation is continued.
[2] TROUBLESHOOTING GUIDE T R OUB L E S HOOT ING G UIDE 1. S E L F -DIA G NOS IS F UNC T ION A ND DIS P L A Y MODE (1) T o call out the content of the s elf-diagnos is memory, hold down the emergency operation button for more than five s econds when the indoor unit is not operating. a) According to the content of the self-diagnosis memory, the Operation LE D (main category) and the P lasmacluster Ion LE Ds (s ub-category) flas h in s ync with the T imer LE D on the indoor unit.
3–4 8 time Indoor/outdoor units in complete shutdown Indoor/outdoor units in complete shutdown Indoor/outdoor units in complete shutdown 7 time Indoor/outdoor units in complete shutdown 12 time 11 time 9 time 6 time 5 time 2 time 1 time Normal flashing -1 Operation lamp(RED) Cluster lamp(BLUE) Operation lamp(RED) Cluster lamp(BLUE) 6 12 -0 12 _ (1)Change the heat-sink thermistor.
3–5 X Indoor/outdoor units in operation Indoor/outdoor units in operation X X Indoor/outdoor units in complete shutdown Indoor unit in operation Outdoor unit in complete shutdown X 14 time Indoor/outdoor units in complete shutdown Indoor unit in operation Outdoor unit in complete shutdown 13 time Drain pump unit Drain pump unit error 30 -0 30 Operation lamp(RED) Cluster lamp(BLUE) EEPROM data error Indoor unit control PCB 20 -0 20 Operation lamp(RED) Cluster lamp(BLUE) Indoor unit fan err
CHECK METHOD (OUTDOOR) CAUTION IN CHECKING PRINTED CIRCUIT BOARDS (PWB) Non-insulated control circuit The GND terminals of the low-voltage circuits (control circuits for microcomputer and thermistors and drive circuits for expansion valve and relays) on the control printed circuit board (PWB) are connected to the compressor drive power supply (370-VDC negative terminal). Therefore, exercise utmost caution to prevent electric shock.
Figure 1 Cautions when attaching or removing the board When operating only the outdoor unit (cooling 55 Hz fixed mode) To make only the outdoor unit run in cooling mode, and apply a voltage of 220 ~ 240V AC to L and N on the terminal board and push the PUMP DOWN SWITCH (SW1). (Avoid operating the outdoor unit alone for long periods of time.
Figure 2 Temperature properties of outdoor thermistors 1 1 8 8 Connector CN8A Connector CN8C TH2 : Heat exchanger pipe thermistor (CN8A 3 - 4 ) TH3 : Outdoor temp. thermistor (CN8A 5 - 6 ) TH4 : Suction thermistor (CN8A 7 - 8 ) TH6 : Thermistor unit A (CN8C 1 - 2 ) TH7 : Thermistor unit B (CN8C 3 - 4 ) TH8 : Thermistor unit C (CN8C 5 - 6 ) TH9 : Thermistor unit D (CN8C 7 - 8 ) Resistance ( ǡ ) Resistance ( ǡ ) TH1 compressor thermistor (CN8A 1 - 2 ) 500k 400k 25 ͠ resistance 45 k 300k 200k 5.
3–9 Check the pressure. The cooling cycle is abnormal. 1. When all rooms are not cooled Yes Repair the wiring between the units. Check that the power between the terminal board " N " and " L " of the indoor unit is AC 230V, 50Hz. No Are the timer lamps of the indoor units in all rooms flashing ? No Is the compressor of the outdoor unit operating ? Press the OPERATION button to start operating the air-conditioner.
3 – 10 Replace the thermistor. No Is the resistance value of the ther mistor for the compressor (TH1), heat Yes ex-changer (TH2) or outdoor temperature (TH3) or suction (TH4, TH6-9) correct? Open circuit of the outdoor thermistor A No Check the voltage (15V). No AC overcurrent Yes Connect CN3 Yes Replace the fan motor. No Inspect the compres sor, heat exchanger and piping. The cycle is abnormal .
3 – 11 R epair the wiring between the units . No R eplace the indoor control P W B . Y es C heck that the power between the terminal board "N" and "1" of the indoor unit is AC 230V . No Is the timer lamp of the indoor unit in the room not cooled flashing ? to 18 ͠㧕 P ress the OP E R AT ION button to start operating the air-conditioner. (S et the cooling mode No Is the timer lamp of the indoor unit in the room not cooled flashing ? Y es Y es R eplace the thermistor.
3 When all rooms are not heated Does the air get cooler in the cooling operation mode? Ye s No Refer to 1 All rooms are not cooled. Press the ON switch on the remote control to run the air conditioner. Set the temperature to 32͠ in the heating mode and start operation. No Ye s Is the outdoor compressor running? No Ye s To A Check the four-way valve. Has the cycle been switched? No The heating cycle is normal.
AEXM24HR CHAPTER 4. REFRIGERATION CYCLE AEXM24HR Service Manual [1] REFRIGERATION SYCLE 1.
AEXM24HR 2. Cycle temperature and ｐressurre in stop valve (AEXM24HR) Running unit 07 & 07 & 07 & 07 (4 units) 12 (1 unit) 09 (1 unit) 07 (1 unit) no opration mode Cool(MAX) Cool(Test run) Heat(MAX) Heat(Test run) 88 43 13 14 71 40 16 17 74 14 31 0 48 5 24 3 1.12MPa(abs) 1.23MPa(abs) 2.33MPa(abs) 1.
AEXM24HR 3. PERFORMANCE CURVES NOT E : T otal cooling capacity and total input with 4 units running. (R unning frequency: HZ) (R unning frequency: HZ) 2400 Input(W) 2400 2200 17 1800 16 15 14 1600 36 34 32 7.5 7.0 6.5 6.0 24 26 28 30 32 34 36 38 40 42 2000 1800 Heating capacity(kW) C ooling capacity(kW) 13 2200 8.0 30 7.0 28 6.0 5.0 -6 44 -4 Outside air temp. (͠) F ig. Outlet air temp. (͠) 2000 Outlet air temp.
AEXM24HR Gauge manifold Compound gauge Lo Hi Hose Service port Stop valve (gas side) Stop valve (liquid side) Vacuume pump adapter Service port Hexagon socket screw key 4 mm Valve shaft cap OPEN Pump down (Pump down is adopted in the case of unit removal for re installation, abandonment, repair etc.) Pump down is to collect the refrigerant into the outdoor unit by control of the stop valves and the compressor. (1) Turn the circuit breaker on. (2) Check that all LED (1.2.3.
AEXM24HR MISWIRING CHECK Miswiring check must be performed after installation, reinstallation and service. UNIT BB UNIT UNIT AA UNIT LEDD22 LE LEDD11 LE This multi-type air conditioner is designed with a WIRE CHECK SWITCH on the outdoor unit, and miswiring of unit-to-unit wiring will be self-corrected by microcomputer. LED 33 LE UNIT CC UNIT SSW W 22 WIREECHECK WIR C HE C K Miswiring check may not be performed when the outdoor temperature is below 5°C .
AEXM24HR Service CHAPTER 5. DISASSEMBLING PROCEDURE AEXM24HR [1] OUTDOOR UNIT Manual 4) Remove the 6 screws fixing the rear guard. 1) Remove the 5 screws fixing the front panel R and slide the front panel R down. 5) Remove the 11 screws fixing the side cover R. 2) Remove the 10 screws fixing the top cover. 6) Remove the 6 screws fixing the side cabinet L. 3) Remove the 6 screws fixing thefront panel L. 7) Cut the insulators. 8) Remove the 2 screws fixing the control box cover.
AEXM24HR 9) Disconnect the 7 connectors. 12)Remove the 5 screws fixing the controlbox assembly. Fan motor / Reverse valve Thermistor/ Expansion valve 13).Cut the2 insulators. C ut 10)Remove the compressor cover. Compressor cover 11)Remove the terminal cover and disconnect 3 terminals. 14)Remove the 3 screws fixing the bulkhead. note: Caution to the connectors‘ position when reinstalling.
AEXM24HR 15)Remove the 1 nut fixing the propeller fan. 19)Position of the thermistors Note :Caution to the position when reinstalling. L oos e G reen 16)remove the 2 screws fixing the motor angle. Orange B lack 17)Cut the fixing bands. Yellow B rown 18)Remove the 4 screws fixing the fan motor.
AEXM24HR 20)How to disassemble the control box assembly 1.Cut the wire fixing band.(3 points) 2. Remove the 4 screws fixing the PWB. 3. Unlock the spacer's lock. Instal this SHORT-CIRCUIT CONNECTOR in a new CONTROL PWB at CONTROL PWB exchange.
AEXM24HR 5–5
AEXM24HR 5–6
AEXM24HR PartsGuide PARTS GUIDE MALTI SPLIT TYPE ROOM AIR CONDITIONERS OUTDOOR UNIT MODELS AE-XM24HR CONTENTS [1] CONTROL BOX PARTS [5] PACKING PARTS [2] CABINET AND PARTS [6] ACCESSORY PARTS [3] CYCLE PARTS INDEX [4] OTHER PARTS Parts marked with " " are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintaining the safety and performance of the set. This document has been published to be used for after sales service only.
AEXM24HR NO.
AEXM24HR [2] CABINET AND PARTS 2-37 2-23 1-45 2-70 2-40 1-71 1-44 2-24 2-26 1-48 2-20 1-60 2-17 1-12 1-66 1-58 1-36 2-9 1-66 1-63 2-38 2-6 1-5-2 1-61 3-15 1-65 4-1 1-46 2-5 1-70 1-4 1-5-1 1-59 2-39 2-31 1-69 1-4 2-36 1-76 1-62 1-52 2-41 1-62 1-2 4-3 2-19 2-20 4-3 1-11 2-25 2-28 4-1 1-3 4-8 2-1 2-5 2-7 2-4 2-49 2-2 2-48 2-46 2-21 1-1 4-9 2-3 2-12 2-10 2-56 2-52 2-22 2-47 2-61 2-62 4-3 2-9 2-53 2-15 4-3 4-3 2-8 2-13 4-4 4-3 2-57 4-3 2-14 3 2-55
AEXM24HR NO.
AEXM24HR [3] CYCLE PARTS 3-14 3-21 3-8 3-35 3-25 2-34 1-69 3-9 3-24 1-54 3-10 3-7 3-17 1-78 2-35 2-33 3-12 3-1-1 3-17 3-23 1-73 3-1-1 3-17 3-1-1 4-6 3-17 3-22 2-67 3-13 2-69 3-1-1 2-68 3-33 3-11 3-31 2-30 3-34 3-30 3-32 3-28 2-66 2-30 3-34 3-30 3-32 2-63 3-28 3-2 3-30 2-30 3-34 3-32 3-28 4-5 3-34 3-30 2-64 3-29 3-5 3-32 3-5-1 2-30 2-16 3-5-2 5
AEXM24HR NO.
AEXM24HR NO. PRICE NEW PART RANK MARK RANK PARTS CODE DESCRIPTION [5] PACKING PARTS 5-1 5-2 5-3 CPADBA072JBKZ CPADBA073JBKZ SPAKCC381JBEZ BOTTOM PAD ASS'Y PACKING PAD ASS'Y PACKING CASE AR AH BE [6] ACCESSORY PARTS 6-5 6-1 6-7 NO.
AEXM24HR INDEX PARTS CODE [ C ] CCHS-A862JBKZ CCIL-A112JBEZ CMOTLB051JBEZ CPADBA072JBKZ CPADBA073JBKZ [ D ] DBOX-A044JBWZ DSGY-C010JBKZ DSGY-C167JBKZ DSGY-C285JBKZ DVLV-A668JBKZ DVLV-A669JBKZ DVLV-A841JBKZ DVLV-A842JBKZ DVLV-A843JBKZ DVLV-A847JBKZ [ F ] FCMPRA240JBKZ FW-VZA073JBKZ [ G ] GCAB-A247JBTB GCAB-A248JBTB GCAB-A303JBTA GFTASA002JBFA GGADFA028JBTA GGADRA001JBTA GLEG-A029JBE0 GLEGMA043JBTB GPLTMA062JBTB GPLTMA066JBTA [ J JHNDPA016JBFA [ L LANG-A540JBWZ LANGKA163JBPZ LANGKA164JBPZ LANGKA165JBPZ LANG
AEXM24HR PARTS CODE [ S ] SPAKCC381JBEZ [ T ] TINS-B107JBRZ TINS-B108JBRZ TINS-B109JBRZ TLAB-B709JBRA TLABBA146JBRA TLAB-C770JBRA TLAB-C773JBRZ TLABCC373JBRZ TLAB-D231JBRZ TLAB-D234JBRZ TLAB-D247JBRZ TLAB-D257JBEZ TSPC-F845JBRZ [ V ] VHDD25VB60+-1 No.
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