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INVENTOR FSAI-SU-93AE3, Service Manual

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INVENTOR FSAI-SU-93AE3 Service Manual Download Page 83

Tr

oubleshooting

 Page 79 

5.7  E7 (Indoor PCB /Display board communication error)

Description

: Indoor PCB does not receive feedback from Display board for 120 seconds.

Recommended parts to prepare:

•  Wiring mistake

•  Faulty PCB

•  Display board malfunction

Troubleshooting and repair:

Power off, then restart the unit 

2 minutes later.

Is it still displaying 

the error code?

Check the wirings and 

connection.

YES

The unit is operating normally.

NO

Are all the 

connections 

good?

 Correct the connection

or replace  the Wirings.

NO

Replace the indoor main 

PCB.

YES

Is the error 

extinguished?

Replace the Display board.

NO

Summary of Contents for FSAI-SU-93AE3

Page 1: ...icing the unit please read this at first Always contact with your service center if meet problem FSAI SU 123AE3 FSOAI SU 123AE3 FSAI SU 93AE3 FSOAI SU 93AE3 FSAIF SU 183AE3 FSOAIF SU 183AE3 FSAIF SU 2...

Page 2: ......

Page 3: ...embly 20 1 Maintenance 2 Disassembly 5 Troubleshooting 59 1 Safety Caution 2 General Troubleshooting 3 Error Diagnosis and Troubleshooting Without Error Code 4 Quick Maintenance by Error Code 5 Troubl...

Page 4: ......

Page 5: ...Contents 1 Precautions 2 2 Information servicing 3 Safety Precautions...

Page 6: ...uld perform electri cal work For more information contact your dealer seller or an authorized service center CAUTION While unpacking be careful of sharp edges around the unit as well as the edges of t...

Page 7: ...ng place the area around the equipment is to be surveyed to make sure that there are no flammable hazards or ignition risks NO SMOKING signs shall be displayed 2 7 Ventilated area Ensure that the area...

Page 8: ...tion of refrigerant in the atmosphere from a leak 2 12 Cabling Check that cabling will not be subject to wear corrosion excessive pressure vibration sharp edges or any other adverse environmental effe...

Page 9: ...re use of reclaimed refrigerant It is essential that electrical power is available before the task is commenced Become familiar with the equipment and its operation Isolate system electrically Before...

Page 10: ...ociated electrical components are sealed to prevent ignition in the event of a refrigerant release Consult manufacturer if in doubt The recovered refrigerant shall be returned to the refrigerant suppl...

Page 11: ...Contents 1 Model Reference 8 2 Electrical Wiring Diagrams 9 2 1 Indoor Unit 9 2 2 Outdoor Unit 11 Specifications...

Page 12: ...ic indoor and outdoor unit model number of your purchased equipment Indoor Unit Model Outdoor Unit Model Capacity Btu Power Supply 9k 220 240V 50Hz 1Phase 12k 18k 24k FSAI SU 93AE3 FSAI SU 123AE3 FSAI...

Page 13: ...ation Paraphrase Y G Yellow Green Conductor ION Positive and Negative Ion Generator CAP Capacitor PLASMA Electronic Dust Collector L LIVE N NEUTRAL Heater The Electric Heating Belt of Indoor Unit T1 I...

Page 14: ...trol feature X Y E 12V 5V HA HB To CCM Comm Bus or 485 Wire controller To Randomly Connected Wire controller To Remote Switch To Remote Alarm 4 3 This symbol indicates the element is optional the actu...

Page 15: ...C Current Detector COMP Compressor L PRO Low Pressure Switch H PRO High Pressure Switch EEV Electronic Expansion Valve 4 WAY OPTIONAL DC FAN CN 7 AC FAN CAPACITOR PAN HEATER CRANKCASE HEATER BROWN I N...

Page 16: ...EATER 2 HEATER 1 OPTIONAL C N 4 BROWN BLUE 16022000019069 YELLOW 3 Applicable to the units adopting DC motor only Applicable to the units adopting AC motor only CN3 CN30 TO I NDO O R UNI T PO W ER SU...

Page 17: ...ode 15 1 6 Heating Mode 15 1 7 Auto mode 16 1 8 Drying Mode 16 1 9 Forced Operation Function 16 1 10 Sleep Function 16 1 11 Auto Restart Function 16 1 12 Refrigerant Leakage Detection 17 1 13 8 C Heat...

Page 18: ...ism based on the unit s current voltage and temperature If automatic shutoff is initiated the corresponding error code is displayed on the indoor unit and the unit ceases operation Indoor fan delayed...

Page 19: ...means the temperature compensation When T1 Ts T the compressor ceases operation When T1 Ts T 1 5 C the compressor continues operation When the AC is operating in mute mode the compressor operates at...

Page 20: ...the temperature rises 1 C to not higher than 30 C every hour After 2 hours the temperature stops rising and the indoor fan is fixed at low speed When heating the temperature decreases 1 C to not lower...

Page 21: ...s or you press Follow Me the function turns off The unit regulates temperature based on its own sensor and settings 1 16 Silence Optional Press Silence on the remote control to enable the SILENCE func...

Page 22: ...erature Ambient temperature Outlet temperature of indoor coil Discharge temperature Suction temperature Targeted frequency Actual frequency IF Indoor fan speed 0 1 2 3 4 14 FF OFF Low speed Medium spe...

Page 23: ...Product Features Page 19 Displayed code Explanation Displayed value Meaning Additional Notes A0 Reserved 0 FF 2 28 5 20 5 25 A1 0 1 2 3 4 5 6 L A U T A 5 T...

Page 24: ...ce 21 1 1 First Time Installation Check 21 1 2 Refrigerant Recharge 23 1 3 Re Installation 24 1 3 1 Indoor Unit 24 1 3 2 Outdoor Unit 26 2 Disassembly 28 2 1 Indoor Unit 28 2 2 Outdoor Unit 40 Mainten...

Page 25: ...event air and moisture from affecting the air conditioner s performance the indoor unit as well as the pipes between the indoor and outdoor unit must be be leak tested and evacuated Leak test soap wat...

Page 26: ...evacuating for an additional 20 minutes If the pressure does not achieve 0 1 MPa 14 5 Psi after 50 minutes check for leakage If the pressure successfully reaches 0 1 MPa 14 5 Psi fully close the Hand...

Page 27: ...om of the cylinder 4 If the refrigerant is R410A invert the cylinder to ensure a complete liquid charge 5 Open the valve at the bottom of the cylinder for 5 seconds to purge the air in the charge hose...

Page 28: ...3 way valve s gas service port 3 Open the Handle Lo manifold valve to purge air from the charge hose for 5 seconds and then close it quickly 4 Close the 2 way valve 5 Operate the air conditioner in co...

Page 29: ...d meter indicates 0 1 MPa 14 5 Psi If the meter does not indicate 0 1 MPa 14 5 Psi after 30 minutes continue evacuating for an additional 20 minutes If the pressure does not achieve 0 1 MPa 14 5 Psi a...

Page 30: ...uate the system for approximately one hour Confirm that the compound meter indicates 0 1 MPa 14 5Psi 4 Close the valve Low side on the charge set and turn off the vacuum pump 5 Wait for 5 minutes then...

Page 31: ...he cylinder to ensure a complete liquid charge 5 Open the valve at the bottom of the cylinder for 5 seconds to purge the air in the charge hose then fully tighten the charge hose with push pin Handle...

Page 32: ...tion 1 Hold the front panel by the tabs on the both sides and lift it see CJ_AF_ INV_001 2 Push up the bottom of an air filter and then pull it out downwards see CJ_AF_INV_002 CJ_AF_INV_001 CJ_AF_INV_...

Page 33: ...e hook towards left to open it see CJ_AF_INV_003 4 Bend the horizontal louver lightly by both hands to loosen the hooks then remove the horizontal louver see CJ_AF_INV_004 CJ_AF_INV_003 CJ_AF_INV_004...

Page 34: ...over see CJ_AF_INV_005 1 and CJ_AF_INV_005 2 6 Disconnect the connector for display board see CJ_AF_INV_005 3 7 Remove the display board see CJ_AF_ INV_005 4 CJ_AF_INV_005 Note This section is for ref...

Page 35: ...on 8 Open the screw caps 2 and the remove the screws see CJ_AF_ INV_006 9 Release the 4 hooks 10 Release the seven hooks in the back see CJ_AF_INV_007 CJ_AF_INV_006 CJ_AF_INV_007 Note This section is...

Page 36: ...Illustration 11 Pull out the panel frame while pushing the hook through a clearance between the panel frame and the heat exchanger see CJ_AF_INV_008 CJ_AF_INV_008 Note This section is for reference on...

Page 37: ...ve the cover of electronic box and the terminal cover see CJ_AF_ INV_009 2 Pull out the room temperature sensor T1 and the coil temperature sensor T2 see CJ_AF_INV_010 3 Remove the two screws used for...

Page 38: ...ght image to remove it CJ_AF_INV_011 2 6 Disconnect the wires Then remove the electronic main board CJ_AF_ INV_012 CJ_AF_INV_011 2 CJ_AF_INV_012 Note This section is for reference only Actual unit app...

Page 39: ...y Page 35 Procedure Illustration 7 Remove the fixing screw then remove the capacitor of fan motor see CJ_AF_ INV_013 CJ_AF_INV_013 Note This section is for reference only Actual unit appearance may va...

Page 40: ...Disassemble the pipe holder located at the rear of the unit see CJ_AF_INV_014 2 Remove the screws on the evaporator located at the fixed plate see CJ_AF_ INV_015 3 Remove the two screws on the evapora...

Page 41: ...Maintenance and Disassembly Page 37 Procedure Illustration 4 Pull out the evaporator see CJ_AF_ INV_017 CJ_AF_INV_017 Note This section is for reference only Actual unit appearance may vary Evaporator...

Page 42: ...or and fan Procedure Illustration 1 Remove the two screws and remove the fixing board of the fan motor see CJ_AF_ INV_018 2 Remove the Bearing sleeve see CJ_AF_ INV_019 3 Remove the fixing screw see C...

Page 43: ...ctrical parts refer to 1 Front panel 2 Electrical parts before disassembling step motor Procedure Illustration 1 Remove the two screws then remove the stepping motor see CJ_AF_INV_021 CJ_AF_INV_021 No...

Page 44: ...handle and then remove the big handle 1 screws see CJ_AB30_INV_001 3 Remove the screws of the top cover and then remove the top cover 3 screws One of the screws is located underneath the big handle se...

Page 45: ...front panel and then remove the front panel 6 screws see CJ_AB30_INV_003 5 Remove the screws of water collecting cover 1 screw see CJ_AB30_ INV_004 CJ_AB30_INV_003 CJ_AB30_INV_004 Note This section is...

Page 46: ...age 42 Procedure Illustration 1 Remove the screws of the right panel and then remove the right panel 5 screws see CJ_AB30_INV_005 CJ_AB30_INV_005 Note This section is for reference only Actual unit ap...

Page 47: ...and then remove the big handle 1 screws see CJ_B30_INV_001 3 Remove the screws of the top cover and then remove the top cover 3 screws One of the screws is located underneath the big handle see CJ_ B3...

Page 48: ...remove the front panel 8 screws see CJ_B30_INV_003 2 Remove the screws of water collecting cover and then remove the water collecting cover 1 screw see CJ_B30_ INV_004 CJ_B30_INV_003 CJ_B30_INV_004 N...

Page 49: ...Page 45 Procedure Illustration 3 Remove the screws of the right panel and then remove the right panel 5 screws see CJ_B30_INV_005 CJ_B30_INV_005 Note This section is for reference only Actual unit app...

Page 50: ...d then remove the big handle 1 screws see CJ_CA30_INV_001 3 Remove the screws of the top cover and then remove the top cover 3 screws One of the screws is located underneath the big handle see CJ_ CA3...

Page 51: ...emove the front panel 7 screws see CJ_CA30_INV_003 5 Remove the screws of water collecting cover and then remove the water collecting cover 1 screw see CJ_ CA30_INV_004 CJ_CA30_INV_003 CJ_CA30_INV_004...

Page 52: ...age 48 Procedure Illustration 1 Remove the screws of the right panel and then remove the right panel 6 screws see CJ_CA30_INV_005 CJ_CA30_INV_005 Note This section is for reference only Actual unit ap...

Page 53: ...an with a spanner see CJ_ODU_ INV_001 2 Remove the fan 3 Remove the screws of the top cover 2 screws see CJ_ODU_INV_002 4 Unfix the hooks and then open the electronic control box cover 4 hooks see CJ_...

Page 54: ...ector for fan motor from the electronic control board see CJ_ODU_INV_004 6 Remove the fixing screws of the fan motor 4 screws see CJ_ODU_INV_005 7 Remove the fan motor CJ_ODU_INV_004 CJ_ODU_INV_005 No...

Page 55: ...g the fan with a spanner see CJ_ODU_ INV_006 2 Remove the fan 3 Unfix the hooks and then open the electronic control box cover 4 hooks see CJ_ODU_INV_007 CJ_ODU_INV_006 CJ_ODU_INV_007 Note This sectio...

Page 56: ...connector for fan motor from the electronic control board see CJ_ODU_INV_008 5 Remove the fixing screws of the fan motor 4 screws see CJ_ODU_INV_009 6 Remove the fan motor CJ_ODU_INV_008 CJ_ODU_INV_0...

Page 57: ...0 2 Pull out the two blue wires connected with the four way valve CJ_ODU_ INV_010 3 Pull out connectors of the condenser coil temp sensor T3 outdoor ambient temp sensor T4 and discharge temp sensor TP...

Page 58: ...T3 outdoor ambient temp sensor T4 and discharge temp sensor T5 see CJ_ODU_INV_011 4 Disconnect the electronic expansion valve wire see Fig CJ_ODU_INV_011 5 Remove the connector for the DR and reactor...

Page 59: ...he panel plate electrical parts and fan assembly refer to 1 Panel plate 2 Electrical parts and 3 Fan assembly before disassembling sound blanket Procedure Illustration 1 Remove the sound blanket side...

Page 60: ...e electrical parts and fan assembly refer to 1 Panel plate 2 Electrical parts and 3 Fan assembly before disassembling four way valve Procedure Illustration 1 Heat up the brazed parts and then detach t...

Page 61: ...an assembly refer to 1 Panel plate 2 Electrical parts and 3 Fan assembly before disassembling compressor Procedure Illustration 1 Remove the flange nut of terminal cover and remove the terminal cover...

Page 62: ...e bottom plate see CJ_ODU_INV_016 4 Heat up the brazed parts and then remove the the discharge pipe and the suction pipe see CJ_ODU_INV_017 5 Lift the compressor from the base pan assembly with pliers...

Page 63: ...ommunication error 73 5 4 E2 Zero crossing detection error diagnosis and solution 75 5 4 E3 F5 Fan speed is operating outside of the normal range diagnosis and solution 76 5 5 E4 E5 F1 F2 F3 Open circ...

Page 64: ...5 10 P1 Over voltage or too low voltage protection diagnosis and solution 83 5 11 P2 High temperature protection of IPM module diagnosis and solution 84 5 12 P4 Inverter compressor drive error diagno...

Page 65: ...scharged before troubleshooting For other models connect discharge resistance approx 100 40W or a soldering iron plug between the positive and negative terminals of the electrolytic capacitor The term...

Page 66: ...EC Refrigerant leak detected Page 80 F0 Overload current protection Page 81 F1 Outdoor ambient temperature sensor T4 open circuit or short circuit Page 78 F2 Condenser coil temperature sensor T3 is i...

Page 67: ...field maintenance Problem Solution 1 Unit will not start Page 66 67 2 The power switch is on but fans will not start Page 66 67 3 The temperature on the display board cannot be set Page 66 67 4 Unit...

Page 68: ...69 5 Condenser Outdoor fan will not start Page 68 69 6 Unit runs but shortly stops Page 68 69 7 Compressor short cycles due to overload Page 68 69 8 High discharge pressure Page 68 69 9 Low discharge...

Page 69: ...x x x x x x Outdoor fan motor x x X x x x x x x Temperature sensor x x x x x T2 Sensor x x x x x x x x Additional refrigerant x x x x x x x x x Compressor x x x x x x x x IPM board x x x x x x x x x...

Page 70: ...g frequently Unit will not start The power switch is on but fans will not start The temperature on the display board cannot be set Unit is on but the wind is not cold hot Unit runs but shortly stops T...

Page 71: ...or outlet of either unit is blocked Interference from cell phone towers and remote boosters Shipping plates remain attached Check heat load Tighten bolts or screws Close all the windows and doors Rem...

Page 72: ...t Condenser Outdoor fan will not start Unit runs but shortly stops Compressor short cycles due to overload High discharge pressure Low discharge pressure High suction pressure Low suction pressure Uni...

Page 73: ...ulb Heavy load condition Loosen hold down bolts and or screws Shipping plates remain attached Poor choices of capacity Contact of piping with other piping or external plate Replace the compressor Leak...

Page 74: ...T1 sensor Indoor coil temp T2 sensor Outdoor coil temp T3 sensor Outdoor ambient temp T4 sensor Compressor discharge temp Tp sensor Measure the resistance value of each winding by using the multi mete...

Page 75: ...acity 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 teste...

Page 76: ...d turn it on 2 minutes later Is it still displaying the error code The unit is operating normally NO If the EEPROM chip is welded on main PCB replace the main PCB directly Otherwise check if the EEPRO...

Page 77: ...rating normally NO Measure Vs Vs is the voltage between S and N of outdoor unit Red pan S Black pan N YES Is the voltage moving alternately between Positive and negative Check the outdoor wiring conne...

Page 78: ...eshooting Page 74 Remarks Use a multimeter to test the resistance of the reactor which does not connect with capacitor The normal value should be around zero ohm Otherwise the reactor must have malfun...

Page 79: ...eedback for 4 minutes or the zero crossing signal time interval is abnormal Recommended parts to prepare Connection mistake Faulty PCB Troubleshooting and repair Check the connections and power supply...

Page 80: ...5 Recommended parts to prepare Wiring mistake Faulty fan assembly Faulty fan motor Faulty PCB Troubleshooting and repair YES Power off then restart the unit after 2 minutes Is it within normal paramet...

Page 81: ...s and need to be replaced DC motor voltage input and output voltage 220 240V No Color Signal Voltage 1 Red Vs Vm 280V 380V 2 3 Black GND 0V 4 White Vcc 14 17 5V 5 Yellow Vsp 0 5 6V 6 Blue FG 14 17 5V...

Page 82: ...than 4 94V the LED will display the failure Recommended parts to prepare Wiring mistake Faulty sensor Faulty PCB Troubleshooting and repair Check the connection between temperature sensor and PCB Repl...

Page 83: ...mistake Faulty PCB Display board malfunction Troubleshooting and repair Power off then restart the unit 2 minutes later Is it still displaying the error code Check the wirings and connection YES The...

Page 84: ...the display area will show EC and AC will turn off Recommended parts to prepare Faulty T2 sensor Faulty indoor PCB System problems such as leakage or blockages Troubleshooting and repair Power off the...

Page 85: ...malfunction Troubleshooting and repair Check the power supply Do any exist Are they within acceptable parameters Are they properly connected Is it in working order Replace the outdoor unit Is it in w...

Page 86: ...lty outdoor PCB Troubleshooting and repair Check the wiring between PCB and compressor Does an error exist Ensure proper connections or replace the wires and connectors YES Check the IPM NO Is it in w...

Page 87: ...oubleshooting and repair Check the power supply Is it in working order Turn off the unit NO Check the connections and wires YES Are they in working order Ensure proper connections or replace the wires...

Page 88: ...of IPM module is higher than setting value the LED displays this failure code Recommended parts to prepare Faulty PCB Connection problems Troubleshooting and repair Check the fastening screws on the...

Page 89: ...ssembly Compressor malfunction Faulty outdoor PCB Troubleshooting and repair Check the wiring between the PCB and compressor Is it improperly wired Ensure proper connections or replace the wires and c...

Page 90: ...Contents i Temperature Sensor Resistance Value Table for T1 T2 T3 and T4 C K 87 ii Temperature Sensor Resistance Value Table for TP C K 88 iii Pressure On Service Port 89 Appendix...

Page 91: ...71 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 0 359...

Page 92: ...78 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...

Page 93: ...44 95 35 105 40 56 115 46 11 120 48 89 PSI 70 59 95 96 108 118 121 115 119 128 150 157 PSI 75 63 99 101 117 128 126 122 129 135 158 165 PSI 80 67 105 106 125 141 138 132 135 143 165 176 PSI 90 73 114...

Page 94: ...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 0 2 17 19 17 18 27 28 PSI 55 448 421 374 337 308 273 244 PSI 65 480 444 394 375 346 303 282 PSI 75 499 466 411 389 369...

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