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COMFORT-AIRE A-SVH09SA-0, Service Manual

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COMFORT-AIRE A-SVH09SA-0 Service Manual Download Page 2

Service Manual  -  

SVH 09/12/18/24 Series

2

CONTENTS 

1.  Precaution ...................................................................................................................................

.

.............. 

3

 

1.1 Safety Precaution .......................................................................................................................... 

3

 

1.2 Warning ......................................................................................................................................... 

3

 

2.  Part Names ..........................................................................................................................................

..

..... 

6

 

2.1 Model Names of Indoor/Outdoor Units ......................................................................................... 

6

2.2 Indoor/Outdoor units ...................................................................................................................... 

7

 

3.  Dimension

s

 ............................................................................................................................................

..

... 

8

 

3.1 Indoor Unit ..................................................................................................................................... 

8

 

3.2 Outdoor Unit ................................................................................................................................ 

11

 

4.  Refrigerant Cycle Diagram...................................................................................................................... 1

2

 

5.  Wiring Diagram ......................................................................................................................................... 1

3

 

6. Installation Details .................................................................................................................................... 1

3

 

6.1 Wrench torque sheet for installation ............................................................................................ 1

3

 

6.2 Connecting the cables ................................................................................................................. 1

3

 

6.3 Pipe length and the elevation ...................................................................................................... 1

3

 

6.4 Installation for the first time ......................................................................................................... 1

4

 

6.5 Adding the refrigerant after the system 

has been in operation

 .

..

................................................ 1

4

 

6.6 Re-installation 

after

 the indoor unit 

has been 

repaired .

...

........................................................... 1

5

 

6.7 Re-installation 

after

 the outdoor unit 

has been

 repaired 

 

.

...

......................................................... 1

6

 

7.  Operation Characteristics ....................................................................................................................... 1

7

 

8. Electronic Function ...............................................................................................................................

.

.. 1

8

8.1 Abbreviation ................................................................................................................................. 1

8

 

8.2 Display Function .......................................................................................................................... 1

8

8.3 Main Protection ............................................................................................................................ 1

9

 

8.4 Operation Modes and Functions ................................................................................................. 

20

 

9. Troubleshooting ....................................................................................................................................... 

2

6

9.1 Indoor Unit Error Display .............................................................................................................. 2

7

9.2 Outdoor Unit Error Display (TBD) ................................................................................................ 2

9

9.3 Diagnosis and Solution ................................................................................................................ 

33

 

10. Disassembly Instructions ........................................................................................................................ 

5

8

10.1 Indoor Unit .................................................................................................................................. 5

8

10.2 Outdoor Unit ............................................................................................................................... 6

7

WARNING 

Installation MUST conform with local building codes or, in the absence of local codes, with the
National Electrical Code NFPA70/ANSI C1-1993 or current edition and Canadian Electrical
Code Part1 CSA C.22.1.

The information contained in the manual is intended for use by a qualified service technician
familiar with safety procedures and equipped with the proper tools and test instruments.

Installation or repairs made by unqualified persons can result in hazards to you and others.

Failure to carefully read and follow all instructions in this manual can result in equipment
malfunction, property damage, personal injury and/or death.

This service manual is only for service engineer to use.

Summary of Contents for A-SVH09SA-0

Page 1: ...SVH09SA 0 A SVH09SA 1 B SVH09SA 1 A SVH12SA 0 B SVH12SA 0 A SVH12SA 1 B SVH12SA 1 A SVH18SA 1 B SVH18SA 1 A SVH24SA 1 B SVH24SA 1 www marsdelivers com Service Manual SVH Series Inverter Single Zone Ductless Mini Split ...

Page 2: ...ction 18 8 3 Main Protection 19 8 4 Operation Modes and Functions 20 9 Troubleshooting 26 9 1 Indoor Unit Error Display 27 9 2 Outdoor Unit Error Display TBD 29 9 3 Diagnosis and Solution 33 10 Disassembly Instructions 58 10 1 Indoor Unit 58 10 2 Outdoor Unit 67 WARNING Installation MUST conform with local building codes or in the absence of local codes with the National Electrical Code NFPA70 ANS...

Page 3: ...ally careful of the case edges and the fins on the condenser and evaporator For installation always contact the dealer or an authorized service center Do not install the product on a defective installation stand Be sure the installation area does not deteriorate with age If the base collapses the air conditioner could fall with it causing property damage product failure and personal injury Do not ...

Page 4: ...at water is drained away properly A bad connection may cause water leakage Keep level even when installing the product It can avoid vibration or water leakage Do not install the product where the noise or hot air from the outdoor unit could disturb the neighborhood It may cause a problem for your neighbors Use two or more people to lift and transport the product Do not install the product where it...

Page 5: ...ontrol with new ones of the same type Do not mix old and new batteries or different types of batteries There is risk of fire or explosion Do not recharge or disassemble the batteries Do not dispose of batteries in a fire They may burn or explode If the liquid from the batteries gets onto your skin or clothes wash it well with clean water Do not use the remote if the batteries have leaked ...

Page 6: ... 1 Model Names of Indoor Outdoor Units Series Capacity Indoor Units Outdoor Units Inverter 9K 9K 12K 12K 18K 24K B SVH09SA 1 A SVH09SA 1 B SVH12SA 0 A SVH12SA 0 B SVH12SA 1 A SVH12SA 1 B SVH18SA 1 A SVH18SA 1 B SVH24SA 1 A SVH24SA 1 B SVH09SA 0 A SVH09SA 0 ...

Page 7: ...Service Manual SVH 09 12 18 24 Series 7 2 2 Indoor Outdoor units ...

Page 8: ... 3 1 Indoor Unit Model WxDxH mm WxDxH inch Mounted plate B SVH09SA 0 B SVH09SA 1 715x194x285 28 15x7 64x11 22 A B SVH12SA 0 B SVH12SA 1 805x194x285 31 69x7 64x11 22 B B SVH18SA 1 957x213x302 37 68x8 39x11 89 C B SVH24SA 1 1040x220x327 40 94x8 67x12 87 D ...

Page 9: ...Service Manual SVH 09 12 18 24 Series 9 7 For Mounting Plate A For Mounting Plate B For Mounting Plate C ...

Page 10: ...Service Manual SVH 09 12 18 24 Series 10 For Mounting Plate D ...

Page 11: ...ppearance of your units may be different Model W D H W1 A B A SVH09SA 0 A SVH09SA 1 A SVH12SA 0 A SVH12SA 1 770 mm 300 mm 555 mm 840 mm 487 mm 298 mm 30 31 inch 11 81 inch 21 85 inch 33 07 inch 19 17 inch 11 73 inch A SVH18SA 1 800 mm 333 mm 554 mm 870 mm 514 mm 340 mm 31 50 inch 13 11 inch 21 81 inch 34 25 inch 20 24 inch 13 39 inch A SVH24SA 1 845 mm 363 mm 702 mm 914 mm 540 mm 350 mm 33 27 inch...

Page 12: ...le Diagram LIQUID SIDE GAS SIDE HEAT EXCHANGE EVAPORATOR HEAT EXCHANGE CONDENSER COMPRESSOR 2 WAY VALVE 3 WAY VALVE 4 WAY VALVE COOLING HEATING T2 Evaporator temp sensor T1 Room temp sensor ACCUMULATOR INDOOR OUTDOOR CHECK VALVE Heating Model only CAPILIARY TUBE ...

Page 13: ... side panel of the unit Please refer to the nameplate before selecting the cable fuse and switch 6 3 Pipe length and the elevation Models Pipe size Gas Liquid A SVH09SA 0 B SVH09SA 0 3 8in Ф9 52mm 1 4in Ф6 35mm A SVH09SA 1 B SVH09SA 1 3 8in Ф9 52mm 1 4in Ф6 35mm A SVH12SA 0 B SVH12SA 0 1 2in Ф12 7mm 1 4in Ф6 35mm A SVH12SA 1 B SVH12SA 1 1 2in Ф12 7mm 1 4in Ф6 35mm A SVH18SA 1 B SVH18SA 1 1 2in Ф12...

Page 14: ...the manifold valve 5 Operate the vacuum pump to evacuate 6 Make evacuation for 30 minutes and check whether the compound meter indicates 0 1Mpa 14 5Psi If the meter does not indicate 0 1Mpa 14 5Psi after pumping 30 minutes it should be pumped 20 minutes more If the pressure can t achieve 0 1Mpa 14 5Psi after pumping 50 minutes please check if there are some leakage points Fully close the handle Lo...

Page 15: ...o the 3 way valves gas service port 3 Air purging of the charge hose Open the handle Lo valve of the manifold valve slightly to purge air from the charge hose for 5 seconds and then close it quickly 4 Set the 2 way valve to the close position 5 Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 0 1 Mpa 14 5Psi 6 Set the 3 way valve to the closed position immediat...

Page 16: ...t the charge hose from the vacuum pump 2 Refrigerant charging Procedure 1 Connect the charge hose to the charging cylinder open the 2 way valve and the 3 way valve Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder If the refrigerant is R410A make the cylinder bottom up to ensure liquid charge 2 Purge the air from the charge hose Open the...

Page 17: ... 9ΔT 5 32 CAUTION 1 If the air conditioner is used beyond the above conditions certain safety protection features may come into operation and cause the unit to operate abnormally 2 The room relative humidity should be less than 80 If the air conditioner operates beyond this figure the surface of the air conditioner may attract condensation Please set the vertical air flow louver to its maximum ang...

Page 18: ...play for some units Displays the temperature settings when the air conditioner is operational Displays the room temperature in Fan and Drying mode Displays the self diagnostic codes Displays for three seconds when Timer ON Fresh Swing Turbo or Silence feature is activated Displays for three seconds when Timer OFF Fresh Swing Turbo or Silence feature is canceled Displays under defrosting operation ...

Page 19: ...ctive immediately and the indoor fan will open seven seconds later If the unit runs in heating mode the indoor fan will be also controlled by anti cold wind function 8 3 7 Compressor preheating functions Preheating permitting condition When T4 outdoor ambient temperature 3 C the preheating function will be activated 8 3 8 Sensor protection at open circuit and breaking disconnection When there is o...

Page 20: ...mpressor will run at low frequency When the current is more than setting value the current protection function will be activated and the compressor will stop 8 4 2 2 Outdoor fan running rules The outdoor unit will be run at different fan speed according to T4 For different outdoor units the fan speeds are different High Low 8 4 2 3 Indoor fan running rules In cooling mode indoor fan runs all the t...

Page 21: ...door unit will be run at different fan speed according to T4 For different outdoor units the fan speeds are different Low High 8 4 3 3 Indoor fan running rules When the compressor is on the indoor fan can be set to high med low auto And the anti cold wind function has the priority The indoor fan is controlled as below Setting fan speed Actual fan speed H H H G A H H B C M M M Z D M M M E F L L L D...

Page 22: ... mode The action of forced auto mode is the same as normal auto mode with 75 F setting temperature When AC receives signals such as switch on switch off timer on timer off mode setting fan speed setting sleeping mode setting follow me setting it will quit the forced operation 8 4 7 Sleep function 8 4 7 1 The sleep function is available in cooling heating or auto mode 8 4 7 2 Operation process in s...

Page 23: ...ction is initiated When the indoor PCB receives the signal which is sent from remote controller every 3 minutes the buzzer will not respond When the unit is running with follow me function the PCB will control the unit according to the temperature from follow me signal and the temperature collection function of room temperature sensor will be shielded but the error detecting function of room tempe...

Page 24: ...tails are as follows Inquiry information Displaying code Meaning T1 T1 T1 temp T2 T2 T2 temp T3 T3 T3 temp T4 T4 T4 temp T2B Tb T2B temp TP TP TP temp TH TH TH temp Targeted Frequency FT Targeted Frequency Actual Frequency Fr Actual Frequency Indoor fan speed IF Indoor fan speed Outdoor fan speed OF Outdoor fan speed EXV opening angle LA EXV opening angle Compressor continuous running time CT Comp...

Page 25: ... c9 120 121 129 d0 d1 d9 130 131 139 E0 E1 E9 140 141 149 F0 F1 F9 150 151 159 Indoor fan speed Outdoor fan speed 0 OFF 1 2 3 4 Low speed Medium speed High speed Turbo For some big capacity motors 14 FF Actual fan speed Display value x 10 The unit is RPM For some small capacity motors display value is from 14 FF hexadecimal the corresponding fan speed range is from 200 2550RPM EXV opening angle 0 ...

Page 26: ...rget to discharge the electricity in capacitor Electrolytic Capacitors HIGH VOLTAGE CAUTION For other models please connect discharge resistance approx 100Ω 40W or soldering iron plug between terminals of the electrolytic capacitor on the contrary side of the outdoor PCB Note The picture above is only for reference The plug of your side may be different ...

Page 27: ...e temperature sensor TP open circuit or short circuit 5 times O F4 Outdoor unit EEPROM parameter error 6 times O F5 Outdoor fan speed has been out of control 1 times P0 IPM malfunction or IGBT over strong current protection 2 times P1 Over voltage or over low voltage protection 3 times P2 High temperature protection of IPM module or compressor top 4 times P3 Outdoor ambient temperature too low 5 t...

Page 28: ... SVH 09 12 18 24 Series 28 Troubleshooting Use the remote controller If the unit does not respond to the remote the indoor PCB needs to be replaced if the unit does respond then the display board needs to be replaced ...

Page 29: ...Service Manual SVH 09 12 18 24 Series 29 9 2 Outdoor unit error display TBD For A SVH09SA 0 A SVH12SA 0 ...

Page 30: ...Service Manual SVH 09 12 18 24 Series 30 For A SVH09SA 1 A SVH12SA 1 ...

Page 31: ...Service Manual SVH 09 12 18 24 Series 31 For A SVH18SA 1 A SVH24SA 1 ...

Page 32: ...en LED2 Red IU display 1 standby for normal O X 2 Operation normally X O 3 IPM malfunction or IGBT over strong current protection X P0 4 Over voltage or too low voltage protection O O P1 5 EEPROM parameter error O E5 6 Inverter compressor drive error X P4 7 Inverter compressor drive error O P4 8 Inverter compressor drive error P4 O light X off 2 5Hz flash ...

Page 33: ...rom EEPROM chip Possible causes Installation error PCB faulty Troubleshooting Yes Replace the indoor outdoor main PCB Power off then restart the unit 2 minutes later EEPROM A read only memory whose contents can be erased and reprogrammed using a pulsed voltage For the location of EEPROM chip please refer to the below photos Indoor PCB Outdoor PCB Note The two photos above are only for reference yo...

Page 34: ...aulty Troubleshooting No Yes Yes No No Yes No Yes No Power off then restart the unit 2 minutes later Is the error extinguished Measure Vs Is the voltage moving alternately between 25V to 25V Check the outdoor wiring connection Is the wiring correct Replace the reactor Does reactor check normal Check the indoor wiring connection Is the wiring correct Replace the indoor main PCB Power on Is the erro...

Page 35: ...is running normally the voltage will move alternately between 25V to 25V If the outdoor unit has malfunction the voltage will move alternately with positive value While if the indoor unit has malfunction the voltage will be a certain value Remark Use a multimeter to test the resistance of the reactor which does not connect with capacitor The normal value should be around zero ohms Otherwise the re...

Page 36: ...s not receive zero crossing signal feedback for 4 minutes or the zero crossing signal time interval is abnormal Possible causes Connection error PCB faulty Troubleshooting Check if the connections and power supply is normal Correct the connections Turn on the unit when the power supply is good No Yes Indoor main PCB is defective Replace indoor main PCB ...

Page 37: ...auses Wiring error Fan assembly faulty Fan motor faulty PCB faulty Troubleshooting Power off then restart the unit 2 minutes later Does unit operate normally Shut off the power supply Can you rotate the fan by hand Issue resolved Find out the cause and resolve Check the wiring of fan motor OK Yes No No Correct the connections No No Replace the fan motor OK Yes Yes Measure the voltage for the fan m...

Page 38: ...115V NO Color Signal Voltage 1 Red Vs Vm 140V 190V 2 3 Black GND 0V 4 White Vcc 14 17 5V 5 Yellow Vsp 0 5 6V 6 Blue FG 14 17 5V 2 Outdoor DC Fan Motor control chip is in outdoor PCB Power on and check if the fan can run normally if the fan can run normally the PCB must be replaced If the fan can t run normally measure the resistance of each two pins If the resistance is not equal to each other the...

Page 39: ...tions If the sampling voltage is lower than 0 06V or higher than 4 94V the LED will display the failure Possible causes Wiring error Sensor faulty PCB faulty Troubleshooting Check the connection between temperature sensor and PCB OK Correct the connection No Yes Replace indoor or outdoor main PCB Measure the resistance value of the sensor OK Replace the sensor No Yes ...

Page 40: ...es the display area will Possible causes T2 sensor faulty Indoor PCB faulty System problems such as leakage or blockage Troubleshooting Is there cool air blowing out from indoor air outlet Yes Yes Check if T2 sensor is well connected Correct the instal lation or replace T2 sensor Does the problem remain No Is there any leakage Especially the connection parts such as the gas valve and the liquid va...

Page 41: ... faulty Wiring error Compressor malfunction Troubleshooting Check the power supply Is it normal Check the connections and wires Is it well connected Stop the unit Check the power supply No Yes No Correct the connections or replace the wires Yes Replace the outdoor main PCB Yes Check the reactor Is it normal No Replace the reactor Is there any blockage Yes Clear the blockage No Check the compressor...

Page 42: ... wiring between main PCB and compressor Are the wires and connectors broken Correct the connection or replace the wires and connectors Yes No IPM continuity check Check if the IPM terminal resistance values are uniform Replace the IPM board or replace the main PCB if the IPM board and main PCB are integrated together No Check if the outdoor fan runs properly or the outdoor unit ventilation is good...

Page 43: ...Service Manual SVH 09 12 18 24 Series 43 For example P U P V Note The photos below are only for reference it may vary from your side ...

Page 44: ...Service Manual SVH 09 12 18 24 Series 44 P W N U ...

Page 45: ...Service Manual SVH 09 12 18 24 Series 45 41 N V N W ...

Page 46: ...ossible causes Power supply problems System leakage or blockage PCB faulty Troubleshooting Check the power supply OK Check the connections and wires OK Stop the unit No Yes No Correct the connections or replace the wires Yes Replace the reactor Yes No Replace the IPM board Check the voltage between P and N OK Check the reactor OK Yes No Replace outdoor main PCB Remark Measure the DC voltage betwee...

Page 47: ...door and outdoor units are obstructed Clear up the air inlet and outlet or the heat exchanger of indoor and outdoor units Yes No Turn off the power supply and turn it on 10 minutes later Check if the temperature of compressor Top Is more than 90 No Yes Check if the refrigerant system is normal Repair the refrigerant system Replace the outdoor control PCB Yes Check if all the connection especially ...

Page 48: ... connection or replace the wires and connectors No Check if the IPM installed correctly Correct the installation tighten the screws and apply silicon grease No IPM continuity check Check if the IPM terminal resistance values are uniform Yes Replace the IPM board or replace the main PCB if the IPM board and main PCB are integrated together No Check if the outdoor fan runs properly or the outdoor un...

Page 49: ...e capacity electrolytic capacitors discharge completely and dismount the IPM Use a digital tester to measure the resistance between P and UVWN UVW and N Digital tester Normal resistance value Digital tester Normal resistance value Red Black Several MΩ Red Black Several MΩ P N U N U V V W W Red ...

Page 50: ...he temperature sensor from PCB measure the resistance value with a tester Temperature sensors Room temp T1 sensor Indoor coil temp T2 sensor Outdoor coil temp T3 sensor Outdoor ambient temp T4 sensor Compressor discharge temp T5 sensor Measure the resistance value of each winding by using the multi meter ...

Page 51: ... 99 5 87359 77 171 1 29078 117 243 0 38991 2 28 39 8239 38 100 5 62961 78 172 1 25423 118 244 0 37956 1 30 37 1988 39 102 5 39689 79 174 1 2133 119 246 0 36954 0 32 35 2024 40 104 5 17519 80 176 1 17393 120 248 0 35982 1 34 33 3269 41 106 4 96392 81 178 1 13604 121 250 0 35042 2 36 31 5635 42 108 4 76253 82 180 1 09958 122 252 0 3413 3 37 29 9058 43 109 4 5705 83 181 1 06448 123 253 0 33246 4 39 2...

Page 52: ... 75 167 8 084 115 239 2 422 4 25 222 8 36 97 34 32 76 169 7 82 116 241 2 357 3 27 211 4 37 99 32 94 77 171 7 566 117 243 2 294 2 28 200 7 38 100 31 62 78 172 7 321 118 244 2 233 1 30 190 5 39 102 30 36 79 174 7 086 119 246 2 174 0 32 180 9 40 104 29 15 80 176 6 859 120 248 2 117 1 34 171 9 41 106 28 81 178 6 641 121 250 2 061 2 36 163 3 42 108 26 9 82 180 6 43 122 252 2 007 3 37 155 2 43 109 25 86...

Page 53: ...6 63 145 4 94 201 2 125 257 4 39 2 33 91 4 64 147 2 95 203 126 258 8 4 5 40 1 34 93 2 65 149 96 204 8 127 260 6 5 41 35 95 66 150 8 97 206 6 128 262 4 6 42 8 36 96 8 67 152 6 98 208 4 129 264 2 7 44 6 37 98 6 68 154 4 99 210 2 130 266 8 46 4 38 100 4 69 156 2 100 212 131 267 8 9 48 2 39 102 2 70 158 101 213 8 132 269 6 10 50 40 104 71 159 8 102 215 6 133 271 4 11 51 8 41 105 8 72 161 6 103 217 4 1...

Page 54: ...09 12 18 24 Series 54 2 Compressor checking Measure the resistance value of each winding by using the tester Position Resistance Value ASN98D22UFZ ASM135D23UFZ ATF235D22UMT Blue Red 1 57Ω 1 75 Ω 0 75 Ω Blue Black Red Blue ...

Page 55: ...tance between P and UVWN UVW and N Digital tester Normal resistance value Digital tester Normal resistance value Red Black Several MΩ Red Black Several MΩ P N U N U V V W W Red 4 Fan Motor Measure the resistance value of each winding by using the tester Model YKT 32 6 202L YKT 32 6 3L YKT 48 6 206 YKT 63 6 200L Brand Tongde Welling Welling Welling Black Red Main Ω 86 213 152 88 5 Blue Black AUX Ω ...

Page 56: ...8 9 9 1 9 6 11 2 F C ODT IDT 75 23 89 85 29 44 95 35 105 40 56 115 46 11 PSI 70 59 119 113 117 125 147 PSI 75 63 124 120 126 132 155 PSI 80 67 135 129 132 140 162 F C ODT IDT 75 23 89 85 29 44 95 35 105 40 56 115 46 11 MPA 70 59 0 82 0 78 0 81 0 86 1 01 MPA 75 63 0 86 0 83 0 87 0 91 1 07 MPA 80 67 0 93 0 89 0 91 0 96 1 12 0 0 2 0 4 0 6 0 8 0 10 0 12 0 75 23 89 85 29 44 95 35 105 40 56 115 46 11 70...

Page 57: ...11 67 47 43 8 33 6 11 37 33 2 78 0 56 27 23 2 78 5 17 13 8 33 10 56 PSI 55 439 413 367 330 302 PSI 65 471 435 386 368 339 PSI 75 489 457 403 381 362 F C ODT IDT 57 53 13 89 11 67 47 43 8 33 6 11 37 33 2 78 0 56 27 23 2 78 5 17 13 8 33 10 56 MPA 55 3 03 2 85 2 53 2 28 2 08 MPA 65 3 25 3 00 2 66 2 54 2 33 MPA 75 3 38 3 15 2 78 2 63 2 49 0 0 5 0 10 0 15 0 20 0 25 0 30 0 35 0 40 0 57 53 13 89 11 67 47...

Page 58: ... 10 1 Indoor unit 10 1 1 How to Remove the filter Step 1 Press the button on the both sides of the indoor unit Open the panel Step 2 Press the A and B then pull the filter 10 1 2 How to Remove the horizontal louver Step 1 Open the horizontal louver push the locker to the right to open it Step 2 Bend the horizontal louver lightly remove it from the indoor unit ...

Page 59: ...ndoor unit Open the panel Step 2 Press the button on both sides of panel Remove the panel 10 1 4 How to Remove the display box Step 1 Open the panel assembly remove 1 screw and electrical cover Step 2 Loosen the display board connector to remove it 10 1 3 How to Remove the panel assembly ...

Page 60: ... Series 60 10 1 5 How to Remove the PCB Step 1 Remove screw A B C D E Step 2 Pull the lock A and B outward then Grab C and D with two hands so that the snap fit inside can be disassembled this is the key step for removing the frame ...

Page 61: ... 24 Series 61 57 Step 3 Remove screws A B C to remove the cover of the electronic cover and terminal cover Step 4 Remove the cement of fan motor signal wire with a tool Step 5 Disconnect the wires the PCB can be seen and removed ...

Page 62: ...62 10 1 6 How to remove the electrical control box Step 1 Remove the 3 screws of earth wire Step 2 Pull the lock upward to pull out the room temp sensor Step 3 Cut off the tie strap to pull out the coil temp sensor B from the sensor holders ...

Page 63: ...12 18 24 Series 63 59 Step 4 Remove screw A and B to remove the cover of the electronic cover and terminal cover Then remove the screw C Step 5 Pull out the electrical control box along the direction indicated in right image ...

Page 64: ...dex fingers and pull it away from the installation plate along the direction indicated in right image about 25 degree Step 2 Disconnect the copper pipe to remove the unit from wall Remove the panel filter electric cover display box louver electric control box and frame part according to the previous steps Step 3 Unfold the Pipe clamp locker A and B along the direction indicated in right image ...

Page 65: ...rvice Manual SVH 09 12 18 24 Series 65 Step 4 Remove 3 screws shown in the pictures Step 5 Hold out against the lock of fan motor with screwdriver then pull to position A and the evaporator can be removed ...

Page 66: ...f fan motor 90 degrees to remove it Step 8 Remove the screw C and the fan motor can be removed 10 1 8 How to Remove the Chassis assembly Step 1 After removing the evaporator and cover of fan motor then remove the fan motor and cross flow fan together Step 2 Remove the bearing base After that the chassis is disassembled ...

Page 67: ...res Remarks 1 Panel plate How to remove the panel plate 1 Stop operation of the air conditioner and turn OFF the power breaker 2 Remove the big handle first then remove the top cover 3 screws 3 Remove the screws of front panel 7 screws 4 Remove the screws of the right side panel 11 screws 2 4 3 3 Screws of front panel 7 screws Screws of top panel 3 screws 1 screws is under the big handle 3 screw o...

Page 68: ...ssembly 1 After removing the panel plate following procedure 1 2 Remove the nut fixing the fan and remove the fan 3 After removing the top cover unfix the hooks and then open the electronic control box cover 2 3 compressor T3 T4 T5 sensor Motor Electronic expansion valve 4 way valve ...

Page 69: ...Service Manual SVH 09 12 18 24 Series 69 4 Disconnect the connector for fan motor from the electronic control board 5 Remove the four fixing screws of the fan motor then remove the motor 5 ...

Page 70: ...electrical parts 1 After completing item 1 and item 2 remove the connector for the compressor 2 Pull out the two blue wires connected with the four way valve 3 Pull out connectors of the condenser coil temp sensor T3 outdoor ambient temp sensor T4 and discharge temp sensor T5 1 2 3 ...

Page 71: ...vice Manual SVH 09 12 18 24 Series 71 4 Disconnect the electronic expansion valve wire from the control board 5 Remove the ground wires 6 Remove the wires 1 2 3 7 Then remove the electronic control box 5 6 ...

Page 72: ...way valve and pipe 5 Then the four way valve assembly can be removed The picture of four way valve may be different from the one on your side 5 Compressor How to remove the compressor 1 After performing item 1 3 Recover refrigerant from the refrigerant circuit 2 Remove the discharge pipe and suction pipe with a burner 3 Remove the hex nuts and washers fixing the compressor on bottom plate 4 Lift t...

Page 73: ...tion of the air conditioner and turn OFF the power breaker 1 Remove the big handle first and then remove the top panel 3 screws 3 Remove the screws of front panel 6 screws 4 Remove the screws of the right side panel 8 screws 2 4 3 Screws of top panel 3 screws 1 screw is under the big handler 3 screws of the big handler 6 screws of front panel ...

Page 74: ...e the fan assembly 1 After removing the panel plate following procedure 1 remove the hex nut fixing the fan and then remove the fan 2 Unfix the hooks and then open the electronic control box cover 1 2 compressor T3 T4 T5 sensor Motor Electronic expansion valve 4 way valve ...

Page 75: ...e electronic control board 4 Remove the four fixing screws of the fan motor Then remove the fan motor 3 Electrical parts How to remove the electrical parts 1 After item 1 and item 2 remove the connectors for the compressor 2 Pull out the two blue wires connected with the four way valve 1 3 4 2 ...

Page 76: ...nnectors of the condenser coil temp sensor T3 outdoor ambient temp sensor T4 and discharge temp sensor T5 4 Disconnect the electronic expansion valve wire 5 Remove the grounding screw 6 Remove the Wires 1 2 3 Then remove the electronic control box 3 4 5 6 ...

Page 77: ...way valve and pipe 5 Now the four way valve assembly can be removed The picture of four way valve may be different from the one on your side 3 4 5 Compressor How to remove the compressor 1 After completing item 1 3 Recover refrigerant from the refrigerant circuit 2 Remove the discharge pipe and suction pipe with a torch 3 Remove the hex nuts and washers fixing the compressor on bottom plate 4 Lift...

Page 78: ...ow to remove the panel plate 1 Stop operation of the air conditioner and turn OFF the power breaker 2 Remove the top panel 3 screws 3 Remove the screws of front panel 9 screws 4 Remove the screws of the right side panel 8 screws 2 4 3 3 screws of top panel 9 screws of front panel 3 screws of big handle ...

Page 79: ...orm the following procedure 1 Remove the hex nut fixing the fan and then remove the fan 2 After removing the top cover unfix the hooks and then open the electronic control box cover 1 2 T3 T4 T5 sensor wire Motor wire Electronic expansion valve Compressor wire 4 way valve wire Electric pipe heater and Crankcase electric heater ...

Page 80: ... for fan motor from the electronic control board 4 Remove the four fixing screws of the fan motor Then remove the fan motor 3 Electrical parts How to remove the electrical parts 1 After finishing item 1 and item 2 remove the connectors for the compressor and reactor 1 3 4 ...

Page 81: ...77 2 Pull out the two blue wires connected with the four way valve 3 Pull out connectors of the condenser coil temp sensor T3 outdoor ambient temp sensor T4 and discharge temp sensor T5 4 Disconnect the electronic expansion valve wire 3 3 4 2 ...

Page 82: ...Service Manual SVH 09 12 18 24 Series 82 5 Remove the electric heaters 6 Remove the grounding screw 7 Remove the Wires 1 2 3 or L1 L2 S Then remove the electronic control box 5 7 ...

Page 83: ... way valve and pipe 6 Then the four way valve assembly can be removed The picture of four way valve may be different from the one on your side 3 5 Compressor How to remove the compressor 1 After completing item 1 3 Recover refrigerant from the refrigerant circuit 2 Remove the discharge pipe and suction pipe with a torch 3 Remove the hex nuts and washers fixing the compressor on bottom plate 4 Lift...

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