Summary of Contents for Mars Comfort-Aire Century SVH09SB-0
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Service Manual SVH-SB Series Inverter Single Zone Ductless Mini-Split SVH09SB-0 SVH09SB-1 SVH12SB-0 SVH12SB-1 SVH18SB-1 SVH24SB-1 www.marsdelivers.com...
Table of Contents §. Safety Precautions Precautions Information servicing(For flammable materials) §. Specifications Model Reference Pipe length and the Drop Height Electrical Wiring Diagrams §. Product Features Display Functions Safety Features Basic Features Optional Features §. Maintenance First Time Installation Checks Refrigerant Recharge Re-Installation §.
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Table of Contents §. Troubleshooting Safety Caution General Troubleshooting Complaint Record Form Information Inquiry Error Diagnosis and Troubleshooting Without Error Code Quick Maintenance by Error Code Troubleshooting by Error Code Check Procedures Appendix Temperature Sensor Resistance Value Table for T1,T2,T3 and T4 (°C – K) Temperature Sensor Resistance Value Table for TP(for some units) (°C –...
1. Precautions CAUTION To prevent personal injury, or property or unit damage, • • While unpacking be careful of sharp edges around adhere to all precautionary measures and instructions the unit as well as the edges of the fins on the con- denser and evaporator.
2. Information servicing(For • Prior to work taking place, the area around the equipment is to be surveyed to make sure that there are no flammable flammable materials) hazards or ignition risks. • NO SMOKING signs shall be displayed. Checks to the area Ventilated area •...
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• that capacitors are discharged: this shall be done in shall also take into account the effects of aging or a safe manner to avoid possibility of sparking; continual vibration from sources such as compressors or fans. • that there no live electrical components and wiring are exposed while charging, recovering or purging 2.13 Detection of flammable refrigerants the system;...
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• The refrigerant charge shall be recovered into the • Before attempting the procedure ensure that: correct recovery cylinders. The system shall be flushed • mechanical handling equipment is available, if with OFN to render the unit safe. This process may required, for handling refrigerant cylinders;...
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• Empty recovery cylinders are evacuated and, if • The recovered refrigerant shall be returned to the possible, cooled before recovery occurs. refrigerant supplier in the correct recovery cylinder, and the relevant Waste Transfer Note arranged. Do not • The recovery equipment shall be in good working mix refrigerants in recovery units and especially not in order with a set of instructions concerning the cylinders.
Specifications Contents Model Reference ....................2 Pipe Length and Drop Height ................3 Electrical Wiring Diagrams ..................4...
1. Model Reference Refer to the following table to determine the specific indoor and outdoor unit model. Indoor Unit Model Outdoor Unit Model Capacity (Btu/h) Power Supply A-SVH09SB-0 B-SVH09SB-0 115V~, 60Hz, 1Phase A-SVH12SB-0 B-SVH12SB-0 A-SVH12SB-1 B-SVH12SB-1 208/230V~, 60Hz, A-SVH18SB-1 B-SVH18SB-1 1Phase A-SVH24SB-1 B-SVH24SB-1...
2. Pipe Length and Drop Height The length and elevation of connection pipe are shown in the table below. if the pipe length exceeds max pipe length, additional refrigerant should be charged to ensure nominal cooling/heating capacity. Capacity(Btu) Standard Length Max Pipe Length Max Elevation Additional Refrigerant...
3. Electrical Wiring Diagrams Indoor and outdoor unit wiring diagram Indoor Unit Outdoor Unit IDU Model IDU Wiring Diagram ODU Model ODU Wiring Diagram A-SVH09SB-0 B-SVH09SB-0 16022000031649 A-SVH12SB-0 B-SVH12SB-0 A-SVH12SB-1 16022000020361 B-SVH12SB-1 16022000019673 A-SVH18SB-1 B-SVH18SB-1 16022000020500 A-SVH24SB-1 B-SVH24SB-1 Outdoor unit printed circuit board diagram Outdoor Unit ODU Model ODU Printed Circuit Board...
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Indoor unit abbreviations Abbreviation Paraphrase Yellow-Green Conductor Positive and Negative Ion Generator Capacitor PLASMA Electronic Dust Collector LIVE NEUTRAL Heater The Electric Heating Belt of Indoor Unit Indoor Room Temperature Coil Temperature of Indoor Heat Exchanger Outdoor unit abbreviations Abbreviation Paraphrase 4-WAY Gas Valve Assembly/4-WAY VALVE...
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Indoor unit wiring diagram: 16022000020361 OPTIONAL OPTIONAL INDOOR WIRING DIAGRAM Applicable to AC motor only 5(3or2) HEATER SWITCH BOARD CN701 OPTIONAL E 12V/5V HA HB OPTIONAL To Randomly To Remote Switch To CCM Comm.Bus or To Remote Alarm Connected 485 Wire-controller Wire-controller - - - - This symbol indicates the element is optional,the actual...
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Name Meaning Earth: connect to Ground Power Supply N_in: connect to N-line (100-130V AC input) L_in: connect to L-line (100-130V AC input) CN16 S: connect to indoor unit communication 4-WAY CN60 connect to 4 way valve, 100-130V AC when is ON. HEAT1 CN17 connect to compressor heater, 100-130V AC when is ON...
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Name Meaning Earth: connect to Ground N_in: connect to N-line (208-230V AC input) CN1A L_in: connect to L-line (208-230V AC input) CN16 S: connect to indoor unit communication HEAT1 CN17 connect to compressor heater, 208-230V AC when is ON 4-WAY CN60 connect to 4 way valve, 208-230V AC when is ON.
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Name Meaning Earth: connect to Ground Power Supply N_in: connect to N-line (208-230V AC input) L_in: connect to L-line (208-230V AC input) S: connect to indoor unit communication 4-WAY CN60 connect to 4 way valve, 208-230V AC when is ON. AC-FAN connect to AC fan HEAT2...
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Product Features Contents Display Functions s ....................2 Safety Features ......................3 Basic Functions .......................4 Table ......................4 Abbreviation ....................5 Fan Mode ......................5 Cooling Mode ....................5 Heating Mode(Heat Pump Units) ..............5 Auto-mode ....................7 Drying Mode ....................7 Forced Operation Function ................7 Sleep Function ....................8 3.10 Auto-Restart Function ..................8 3.11 Refrigerant Leakage Detection ...............8 3.12 Ionizer/Plasma (for some models) ..............8...
1. Display Function Unit display functions fresh defrost run timer fresh defrost run timer fresh defrost run timer Display A Display B Display C Display D Display E Display F Display Function Fresh(available on select units only) fresh or Defrost defrost or When the unit is on run or...
2. Safety Features Compressor three-minute delay at restart Compressor functions are delayed for up to one minute upon the first startup of the unit, and are delayed for up to three minutes upon subsequent unit restarts. Zero crossing detection error protection(Except for DC fan units) If AC can not detect zero crossing signal for 4 minutes or the zero crossing signal time interval is not correct, the unit will stop and the LED will display the failure.
3. Basic Functions Table Cooling Mode&Heating Heating Mode mode Functions Auto Mode Outdoor Fan Control Defrosting Mode Case 1: Case 1:T3 Case 2: Compressor Case A=2°C(3.6°F), Cases and T4,15 Case 1-1 T3,10 Frequency and 2:T4 B=-2°C(-3.6°F) A-SVH09SB-0/B-SVH09SB-0 A-SVH12SB-0/B-SVH12SB-0 Models A-SVH12SB-1/B-SVH12SB-1 A-SVH18SB-1/BSVH18SB-1 A-SVH24SB-1/B-SVH24SB-1 Note: The detailed description of case 1 or case 2 is shown in the following function sections 3.4 &...
Abbreviation auto. • If the compressor ceases operation when the Unit element abbreviations configured temperature is reached, the indoor fan motor operates at the minimum or configured speed. Abbreviation Element • The indoor fan is controlled as below: Indoor room temperature Setting fan T1-Td ℃(°F) Actual fan speed...
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parameter of EEPROM. It’s value ranges from -6°C to 6°C. T1-Td • When T1-Ts>-∆T3, the compressor ceases operation. • When T1-Ts<-∆T3-1.5°C(2.7°F), the compressor continues operation. • When the AC is operating in mute mode, the compressor operates at a low frequency. •...
Case 1-1(for some models): time and then choose mode according to ∆T. • If T3 is lower than 3°C(37.4°F). and compressor Drying mode running time is more than 120 minutes, If any one of the following conditions is satisfied, defrosting ends •...
Sleep function • If the unit was in forced cooling mode, it will run in this mode for 30 minutes and turn to auto mode with • The sleep function is available in cooling, heating, or temperature set to 24°C(76°F). auto mode.
4. Optional Functions Follow me • If you press “Follow Me” on the remote, the indoor 46°F Heating unit will beep. This indicates the follow me function is active. In heating mode, the temperature can be set to as low as 8°C, preventing the indoor area from freezing if •...
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Maintenance Contents First Time Installation Check .................2 Refrigerant Recharge ....................4 Re-Installation .......................5 Indoor Unit ....................5 Outdoor Unit ....................7...
1. First Time Installation Check Air and moisture trapped in the refrigerant system affects To prevent air and moisture from affecting the air the performance of the air conditioner by: conditioner’s performance, the indoor unit, as well as the pipes between the indoor and outdoor unit, must be be •...
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Procedure: • If the pressure successfully reaches -0.1 MPa Tighten the flare nuts of the indoor and outdoor (14.5 Psi), fully close the Handle Lo valve, then units, and confirm that both the 2- and 3-way valves cease vacuum pump operations. are closed.
2. Refrigerant Recharge mA A Procedure: Close both 2- and 3-way valves. 3-way valves. Slightly connect the Handle Lo charge hose to the Operate the air conditioner in cooling mode to charge 3-way service port. the system with liquid refrigerant. Connect the charge hose to the valve at the bottom When the electronic scale displays the correct of the cylinder.
3. Re-Installation Indoor Unit Collecting the refrigerant into the outdoor unit Procedure: Close the 3-way valve so that the gauge rests Confirm that the 2- and 3-way valves are opened. between 0.3 MPa (43.5 Psi) and 0.5 MPa (72.5 Psi). Connect the charge hose with the push pin of Handle Lo to the 3-way valve’s gas service port.
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Air purging with vacuum pump Procedure: • If the pressure successfully reaches -0.1 MPa Tighten the flare nuts of the indoor and outdoor (14.5 Psi), fully close the Handle Lo valve, then units, and confirm that both the 2- and 3-way valves cease vacuum pump operations.
Outdoor Unit Evacuation for the whole system Procedure: Wait for 5 minutes then check whether the gauge Confirm that the 2- and 3-way valves are opened. needle moves after turning off the vacuum pump. If Connect the vacuum pump to the 3-way valve’s the gauge needle moves backward, check whether service port.
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Refrigerant charging mA A Procedure: Close both 2- and 3-way valves. Fully open the Handle Lo manifold valve, 2- and 3-way valves. Slightly connect the Handle Lo charge hose to the 3-way service port. Operate the air conditioner in cooling mode to charge the system with liquid refrigerant.
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Indoor Unit Disassembly Contents Dimension ......................2 Indoor Unit Disassembly ..................3 Front Panel ....................3 Electrical parts ....................8 Evaporator ....................12 Fan motor and fan ..................14 Step motor ....................16 Drain Hose ....................17...
2. Disassembly Indoor unit Front Panel Procedure Illustration 1) Hold the front panel by the tabs on Front Panel the both sides and lift it (see CJ_ AF_001). CJ_AF_001 2) Push up the bottom of an air filter, and then pull it out downwards (see CJ_AF_002).
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Procedure Illustration 3) Open the horizontal louver and push the hook towards left to open it (see CJ_AF_003). Horizontal Louver Hook CJ_AF_003 4) Bend the horizontal louver lightly by both hands to loosen the hooks, then remove the horizontal louver (see CJ_AF_004).
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Procedure Illustration 5) Remove 1 screw and then remove the electrical cover(see CJ_AF_005-1 and CJ_AF_005-2). CJ_AF_005-1 CJ_AF_005-2 6) Disconnect the connector for display board(see CJ_AF_005-3) . CJ_AF_005-3 7) Remove the display board(see CJ_ AF_005-4). CJ_AF_005-4 CJ_AF_005 Note: This section is for reference only. Actual unit appearance may vary. ...
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Procedure Illustration 8) Open the screw caps(2) and the remove the screws(see CJ_AF_006). 9) Release the 4 hooks. CJ_AF_006 10) Release the seven hooks in the back (see CJ_AF_007). Hooks CJ_AF_007 Note: This section is for reference only. Actual unit appearance may vary. ...
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Procedure 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_008). CJ_AF_008 Panel Frame Note: This section is for reference only. Actual unit appearance may vary. ...
Electrical parts Note: Remove the front panel (refer to 1. Front panel) before disassembling electrical parts. Procedure Illustration 1) Remove the fixing screw and then remove the cover of electronic box and the terminal cover (see CJ_AF_009). Electronic Cover Fixing Screw CJ_AF_009 2) Pull out the room temperature sensor (T1) and the coil temperature sensor...
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Procedure Illustration 4) Remove the fixing screw (see CJ_ AF_011-1). 5) Pull out the Electrical control box along the direction indicated in right image. to remove it (CJ_AF_011-2). Fixing Screw CJ_AF_011-1 Electronic Box CJ_AF_011-2 Swing Motor Applicable to AC Motor Only Indoor Fan Motor 6) Disconnect the wires.
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Procedure Illustration 7) Remove the fixing screw, then remove the capacitor of fan motor (see CJ_ AF_013). Capacitor of Fan Motor CJ_AF_013 Note: This section is for reference only. Actual unit appearance may vary. Indoor Unit Disassembly 10 Indoor Unit Assembly 10...
Evaporator Note: Remove the front panel and electrical parts (refer to 1. Front panel and 2. Electrical parts) before disassembling evaporator. Procedure Illustration 1) Disassemble the pipe holder located at the rear of the unit (see CJ_AF_014). Pipe Holder CJ_AF_014 2) Remove the screws on the evaporator located at the fixed plate (see CJ_AF_015).
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Procedure Illustration 4) Pull out the evaporator (see CJ_AF_017). Evaporator CJ_AF_017 Note: This section is for reference only. Actual unit appearance may vary. Indoor Unit Disassembly 12 Indoor Unit Assembly 12...
Fan motor and fan Note: Remove the front panel, electrical parts and evaporator (refer to 1. Front panel, 2. Electrical parts, and 3. Evaporator). before disassembling fan motor and fan. Procedure Illustration 1) Remove the two screws and remove the fixing board of the fan motor (see CJ_ AF_018).
Step motor Note: Remove the front panel and electrical 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_021). Stepping Motor CJ_AF_021 Note: This section is for reference only. Actual unit appearance may vary. ...
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Outdoor Unit Disassembly Contents Outdoor Unit Table ....................2 Dimension ......................3 Outdoor Unit Disassembly ..................18 Panel Plate ....................18 Electrical Parts .....................43 Fan Assembly ....................60 Fan Motor ....................61 Sound blanket .....................62 Four-way valve .....................63 Compressor ....................64...
9 9 , , 1 1 2 2 K K Panel Plate 28.62 10.63 17.80 28.35 2.76 1.30 1.93 0.43 Outdoor Unit Disassembly 13 Outdoor Unit Assembly 3...
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For US models: 9 9 , , 1 1 2 2 K K 28.62 10.63 17.80 2.76 28.35 1.30 1.93 0.43 Outdoor Unit Disassembly 14 Outdoor Unit Assembly 4...
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1 1 8 8 K K Panel Plate 30.87 11.93 17.80 2.76 29.88 0.70 2.44 0.39 Outdoor Unit Disassembly 15 Outdoor Unit Assembly 5...
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For US models: 1 1 8 8 K K 30.87 11.93 17.80 2.76 29.88 0.70 2.44 2.44 0.39 Outdoor Unit Disassembly 16 Outdoor Unit Assembly 6...
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2 2 4 4 K K Panel Plate Outdoor Unit Disassembly 18 Outdoor Unit Assembly 7...
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For US models: 2 2 4 4 K K Outdoor Unit Disassembly 19 Outdoor Unit Assembly 8...
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6. 9 9 K K Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screw of the big handle and then remove the big handle (1 screw) (see CJ_X130_001). Big Handle CJ_X130_001 Top Cover 3) Remove the screws of the top cover and then remove the top cover (3 screws).
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Procedure Illustration 4) Remove the screws of water collecting cover and then remove the water collecting cover (2 screws) (see CJ_ X130_003). Water Collecting Cover CJ_X130_003 5) Remove the screws of the front panel and then remove the front panel (6 screws(onoff models) or 8 screws(inverter models) (see CJ_ X130_004).
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Procedure Illustration 6) Remove the screws of the right panel and then remove the right panel (5 screws) (see CJ_X130_005). Right Panel CJ_X130_005 Note: This section is for reference only. Actual unit appearance may vary. Outdoor Unit Disassembly 38 ...
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7. 1 1 2 2 K K & & 1 1 8 8 K K Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screw of the big handle and then remove the big handle (1 screws) (see CJ_X230_001).
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Procedure Illustration 4) Remove the screws of water collecting cover and then remove the water collecting cover (2 screws) (see CJ_ X230_003). Water Collecting Cover CJ_X230_003 5) Remove the screws of the front panel and then remove the front panel (7 screws(onoff models) or 9 screws(inverter models) (see CJ_ X230_004).
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Procedure Illustration 6) Remove the screws of the right panel and then remove the right panel (5 screws) (see CJ_X230_005). Right Panel CJ_X230_005 Note: This section is for reference only. Actual unit appearance may vary. Outdoor Unit Disassembly 41 ...
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8. 2 2 4 4 K K Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screw of the big handle and then remove the big handle (1 screw) (see CJ_X430_001). Big Handle CJ_X430_001 Top Cover 3) Remove the screws of the top cover and then remove the top cover (3...
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Procedure Illustration 4) Remove the screws of water collecting cover and then remove the water collecting cover (2 screws) (see CJ_ X430_003). Water Collecting Cover CJ_X430_003 5) Remove the screws of the front panel and then remove the front panel (7 screws(onoff models) or 9 screws(inverter models) (see CJ_ X430_004).
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Procedure Illustration 6) Remove the screws of the right panel and then remove the right panel (6 screws) (see CJ_X430_005). Right Panel CJ_X430_005 Note: This section is for reference only. Actual unit appearance may vary. Outdoor Unit Disassembly 44 ...
Electrical parts Antistatic gloves must be worn when you disassemble the electronic box. WARNING: Note: Remove the air outlet grille(refer to 3.1 Panel Plate) before disassembling electrical parts. PCB for ON-OFF Models 1. PCB board 1 Procedure Illustration 1) Remove the two screws fixed the electronic control board (see CJ_ ODU_PCB_001).
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Procedure Illustration 8) For models with subzero refrigeration control board, remove 3 screws of it showed in the figure. CJ_ODU_PCB_001-03 9) The subzero refrigeration control board is in the back of the medal sheet. CJ_ODU_PCB_001-04 Note: This section is for reference only. Actual unit appearance may vary. ...
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2. PCB board 2 Procedure Illustration Fan Motor 1) Disconnect the wires connected to the compressor. (Red wire connects 4-Way Valve Compressor with PCB board, others connects with terminals) (see CJ_ODU_PCB_002-1) 2) Disconnect the connectors for fan motor. (Blue wire, red wire, brown wire and black wire.
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3. PCB board 3 Procedure Illustration Earth wire 1) Disconnect the connectors for fan Fan motor motor (see CJ_ODU_PCB_003). 2) Disconnect the wires connected to the compressor (see CJ_ODU_ PCB_003). 3) Disconnect the wires connected to Pipe temperature sensor (see CJ_ ODU_PCB_003).
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PCB for Inverter Models 4. PCB board 4 Procedure Illustration 1) Remove the screws of the top cover. (2 screws) (see CJ_ODU_PCB_004- 1 ). CJ_ODU_PCB_004-1 2) Unfix the hooks and then open the electronic control box cover (4 hooks) (see CJ_ODU_PCB_004-2 ). 3) Disconnect the connector for fan motor from the electronic control board (see CJ_ODU_PCB_004-3 ).
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5. PCB board 5 Procedure Illustration 1) Unfix the hooks and then open the electronic control box cover (4 hooks) (see CJ_ODU_PCB_005-1 ). 4-Way Valve 2) Disconnect the connector for fan CJ_ODU_PCB_005-1 motor from the electronic control board (see CJ_ODU_PCB_005-2 ). 3) Remove the connector for the Reactor compressor (see CJ_ODU_PCB_005-...
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5. PCB board 6 Procedure Illustration 1) Remove the screws and unfix the hooks, then open the electronic control box cover (5 screws and 2 hooks )(see CJ_ODU_PCB_006-1 ). CJ_ODU_PCB_006-1 2) Disconnect the connector for fan motor from the electronic control board (see CJ_ODU_PCB_006-2 ).
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6. PCB board 7 Procedure Illustration 1) Remove the screws of the top cover. (1 screws) (see CJ_ODU_PCB_007- 1 ). CJ_ODU_PCB_007-1 2) Unfix the hooks and then open the electronic control box cover (5 hooks) (see CJ_ODU_PCB_007-2 ). CJ_ODU_PCB_007-2 3) Disconnect the connector for fan motor from the IPM board (see CJ_ ODU_PCB_007-3 ).
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Procedure Illustration 5) Pull out the wire connected with the terminal. (see CJ_ODU_PCB_007-4 ). T3/T4 6) Pull out connectors of the condenser coil temp. sensor(T3),outdoor ambient temp. sensor(T4) and discharge temp. sensor(TP) (see CJ_ODU_PCB_007-4 ). 7) Disconnect the electronic expansion valve wire (see Fig CJ_ODU_PCB_007- 4 ).
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7. PCB board 8 Procedure Illustration 1) Unfix the hooks and then open the electronic control box cover (4 hooks) (see CJ_ODU_PCB_008-1 ). 2) Disconnect the connector for outdoor DC fan from the electronic control board (see CJ_ODU_ PCB_008-2 ). 3) Remove the connector for the compressor (see CJ_ODU_PCB_008- 2 ).
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9. PCB board 9 Procedure Illustration 1) Disconnect the connector for compressor and release the ground wire(1 screw). (see CJ_ODU_ PCB_009-1 ). 2) Pull out the wires from electrical supporting plate and turn over the CJ_ODU_PCB_009-1 electronic control assembly. (see CJ_ODU_PCB_009-2 ).
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Procedure Illustration 4) Remove the fixing board (2 hooks) (see CJ_ODU_PCB_009-4 ). CJ_ODU_PCB_009-4 5) Disconnect the connectors from the electronic control board (see CJ_ODU_PCB_009-5 ). CJ_ODU_PCB_009-5 6) Then remove the electronic control board (4 hooks).(see CJ_ODU_ PCB_009-6 ). CJ_ODU_PCB_009-6 Note: This section is for reference only. Actual unit appearance may vary. ...
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10. PCB board 10 Procedure Illustration 1) Unfix the hooks and then open the electronic control box cover (4 hooks) (see CJ_ODU_PCB_010-1 ). CJ_ODU_PCB_010-1 2) Remove 4 screws on the electronic control board and then turn over the electronic control board (see CJ_ODU_PCB_010-2 ).
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Procedure Illustration 3) Pull out the connectors (see CJ_ ODU_PCB_010-3 ). 4) Remove the 9 screws and unfix the 3 hooks and then remove the electronic control board(see CJ_ ODU_PCB_010-3 ). CJ_ODU_PCB_010-3 5) Remove two screws and then remove the electronic control box subassembly on partition board assembly.
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Procedure Illustration 6) Remove two screws and two connectors and then remove the inverter control board (see CJ_ODU_ PCB_010-5 ). CJ_ODU_PCB_010-5 Note: This section is for reference only. Actual unit appearance may vary. Outdoor Unit Disassembly 59 Outdoor Unit Assembly 32...
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11. PCB board 11 Procedure Illustration 1) Disconnect the connector for compressor and release the ground wire(1 screw). (see CJ_ODU_ PCB_0011-1 ). 2) Pull out the wires from electrical supporting plate and turn over the CJ_ODU_PCB_011-1 electronic control assembly. (see CJ_ODU_PCB_011-2 ).
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Procedure Illustration 4) Remove the fixing board (2 hooks) (see CJ_ODU_PCB_011-4 ). CJ_ODU_PCB_011-4 5) Disconnect the connectors from the electronic control board (see CJ_ODU_PCB_011-5 ). CJ_ODU_PCB_011-5 6) Then remove the electronic control board (4 hooks).(see CJ_ODU_ PCB_011-6 ). CJ_ODU_PCB_011-6 Note: This section is for reference only. Actual unit appearance may vary. ...
Fan Assembly Note: Remove the panel plate (refer to 3.1 Panel Plate) before disassembling fan. Procedure Illustration 1) Remove the nut securing the fan with a spanner (see CJ_ODU_ FAN_001). 2) Remove the fan. D-cut CJ_ODU_FAN_001 Note: This section is for reference only. Actual unit appearance may vary. ...
Fan Motor Note: Remove the panel plate and the connection of fan motor on PCB (refer to 3.1 Panel Plate and 3.2 Electrical parts) before disassembling fan motor. Procedure Illustration 3) Remove the fixing screws of the fan motor (4 screws) (see CJ_ODU_MOTOR_001). 4) Remove the fan motor.
Sound blanket Note: Remove the panel plate (refer to 3.1 Panel plate) before disassembling sound blanket. Procedure Illustration 1) Remove the sound blanket (side and top) (see CJ_ODU_BLANKET_001). Sound Blanket(top) Sound Blanket(side) CJ_ODU_BLANKET_001 Note: This section is for reference only. Actual unit appearance may vary. ...
Four-way valve (for heat pump models) WARNING: Evacuate the system and confirm that there is no refrigerant left in the system before removing the four-way valve and the compressor. (For R32 & R290, you should evacuate the system with the vacuum pump; flush the system with nitrogen;...
Compressor WARNING: Evacuate the system and confirm that there is no refrigerant left in the system before removing the four-way valve and the compressor. (For R32 & R290, you should evacuate the system with the vacuum pump; flush the system with nitrogen; then repeat the two steps before heating up the brazed parts. The operations above should be implemented by professionals.) Note: Remove the panel plate, connection of compressor on PCB (refer to 3.1 Panel plate and 3.2 Electrical parts) before disassembling sound blanket.
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Procedure Illustration 3) Remove the hex nuts and washers securing the compressor, located on the bottom plate (see CJ_ODU_COMP_003). CJ_ODU_COMP_003 Suction Pipe 4) Heat up the brazed parts and then remove the the discharge pipe and the suction pipe (see CJ_ODU_COMP_004). Discharge Pipe 5) Lift the compressor from the base pan assembly with pliers.
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Troubleshooting Contents Safety Caution .......................3 General Troubleshooting ..................4 Complain Record Form ..................6 Information Inquiry ....................8 Error Diagnosis and Troubleshooting Without Error Code .......11 Remote maintenance ...................11 Field maintenance ..................12 Quick Maintenance by Error Code ..............17 Troubleshooting by Error Code ................17 TS01 EEPROM Parameter Error Diagnosis and Solution TS02 Indoor and Outdoor Unit Communication Error Diagnosis and Solution TS03 Zero-crossing Signal Detection Error Diagnosis and Solution...
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Contents TS09 IPM Malfunction or IGBT Over-strong Current Protection Diagnosis and Solution TS10 Over Voltage or Too Low Voltage Protection Diagnosis and Solution TS11 Top temperature Protection of Compressor or High Temperature Protection of IPM Module or High Pressure Protection Diagnosis and Solution TS12 Inverter Compressor Drive Error Diagnosis and Solution TS13 Low Pressure Protection Diagnosis and Solution TS14 Indoor units mode conflic Diagnosis and Solution...
1. Safety Caution WARNING Be sure to turn off all power supplies or disconnect all wires to avoid electric shock. While checking indoor/outdoor PCB, please equip oneself with antistatic gloves or wrist strap to avoid damage to the board. WARNING Electricity remains in capacitors even when the power supply is off.
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When the indoor unit encounters a recognized error on different models , 1. the running LED with flash in a corresponding series, the timer LED may turn on or begin flashing; 2. an error code will be displayed; 3. both 1 and 2. These error codes are described in the following tables: Running Timer...
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Indoor room temperature sensor T1 is in open circuit or has short 6 times EH 60 TS05-IDU circuited Evaporator coil middle temperature sensor T2 is in open circuit or 6 times TS05-IDU EH 61 has short circuited 12 times The outdoor fan speed is operating outside of the normal range TS04-ODU EC 07 9 times...
3. Complain Record Form Complain Record Form Request No.: Date: Installation Date: Service Date: Customer Information Name Telephone No. Home Address Email Product Information Indoor Unit Model Outdoor Unit Model Serial No. of indoor unit Serial No. of outdoor unit Working Mode □Cooling □Heating...
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Indoor coil temperature Outdoor coil temperature Ambient temperature Outlet temperature of indoor coil Discharge temperature Sunction temperature Targeted Frequency Actual Frequency Indoor fan speed Outdoor fan speed EXV opening steps Compressor continuous running time Causes of compressor stop. A0, A1, b0, b1, b2, b3, b4, b5, b6, dL, Ac, Uo, Td, dA, Reserved dS, dT...
4. Information Inquiry • To enter information inquiry status, complete the following procedure within ten seconds: • Press LED(or DO NOT DISTURB) 3 times. • Press SWING(or AIR DIRECTION) 3 times. • Finish 1 and 2 within 10 seconds, you will hear beeps for two seconds, which means the unit goes into parameter checking mode.
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Displayed Displayed code Explanation Meaning Additional Notes value Room temperature 1. All displayed temperatures use actual values. Indoor coil temperature 2. All temperatures are -1F,-1E,-1d,-1c,- -25,-24,-23,-22, displayed in °C regardless Outdoor coil 1b,-1A -21,-20 of remote used. temperature -19—99 -19—99 3.
5. Error Diagnosis and Troubleshooting Without Error Code WARNING Be sure to turn off unit before any maintenance to prevent damage or injury. Remote maintenance SUGGESTION: When troubles occur, please check the following points with customers before field maintenance. Problem Solution Unit will not start 13-14...
Field maintenance Problem Solution Unit will not start 15-16 Compressor will not start but fans run 15-16 Compressor and condenser (outdoor) fan will not start 15-16 Evaporator (indoor) fan will not start 15-16 Condenser (Outdoor) fan will not start 15-16 Unit runs, but shortly stops 15-16 Compressor short-cycles due to overload...
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1.Remote Maintenance Electrical Circuit Refrigerant Circuit Possible causes of trouble Unit will not start ☆ ☆ ☆ ☆ The power switch is on but fans will not start ☆ ☆ ☆ The temperature on the display board cannot be set ☆...
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1.Remote Maintenance Others Possible causes of trouble 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 The unit starts up and stops frequently ☆...
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2.Field Maintenance Refrigerant Circuit Others Possible causes of trouble Unit will not start Compressor will not start but fans run ☆ Compressor and condenser (outdoor) fan will not start Evaporator (indoor) fan will not start Condenser (Outdoor) fan will not start Unit runs, but shortly stops ☆...
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2.Field Maintenance Electrical Circuit Possible causes of trouble Unit will not start ☆ ☆ ☆ ☆ ☆ ☆ Compressor will not start but fans run ☆ ☆ ☆ ☆ ☆ Compressor and condenser (outdoor) fan will not start ☆ ☆ ☆...
6. Quick Maintenance by Error Code If you do not have the time to test which specific parts are faulty, you can directly change the required parts according the error code. You can find the parts to replace by error code in the following table. Error Code Part requiring EH 00/...
TS01-IDU: Indoor EEPROM parameter error diagnosis and solution Description: Indoor PCB main chip does not receive feedback from EEPROM chip. Recommended parts to prepare: • Indoor PCB Troubleshooting and repair: Shut off the power supply and turn it on 2 minutes later. Is it still displaying The unit is operating normally.
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TS01-ODU: Outdoor EEPROM parameter error or Compressor driven chip EEPROM parameter error diagnosis and solution Description: Outdoor PCB main chip does not receive feedback from EEPROM chip or compressor driven chip. Recommended parts to prepare: • Outdoor PCB Troubleshooting and repair: Shut off the power supply and turn it on 2 minutes later.
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TS02-S-INV: Indoor and outdoor unit communication error diagnosis and solution Description: Indoor unit can not communicate with outdoor unit Recommended parts to prepare: • Indoor PCB • Outdoor PCB • Short-circuited component Troubleshooting and repair: Power off, then restart the unit after 2 minutes.
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Remarks: • Use a multimeter to test the DC voltage between 2 port(or S or L2 port) and 3 port(or N or S port) of outdoor unit. The red pin of multimeter connects with 2 port(or S or L2 port) while the black pin is for 3 port(or N or S port) . •...
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TS03: Zero crossing detection error diagnosis and solution Description: When PCB does not receive zero crossing signal feedback for 4 minutes or the zero crossing signal time interval is abnormal. Recommended parts to prepare: • Connection wires • Indoor main PCB Troubleshooting and repair: Check the connections and power supply.
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TS04-S-IDU: The Indoor fan speed is operating outside of normal range diagnosis and solution) Description: When indoor fan speed keeps too low or too high for a certain time, the LED displays the failure code and the AC turns off. Recommended parts to prepare: •...
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Index: 1. DC Fan Motor(control chip is in fan motor) Power on and when the unit is in standby, measure the voltage of pin1-pin3, pin4-pin3 in fan motor connector. If the value of the voltage is not in the range showing in below table, the PCB must has problems and need to be replaced. •...
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TS04-ODU: The outdoor fan speed is operating outside of normal range diagnosis and solution) Description: When outdoor fan speed keeps too low or too high for a certain time, the LED displays the failure code and the AC turns off. Recommended parts to prepare: •...
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Index: 1. Outdoor DC Fan Motor (control chip is in outdoor PCB) Release the UVW connector. Measure the resistance of U-V, U-W, V-W. If the resistance is not equal to each other, the fan motor must has problems and need to be replaced. otherwise the PCB must has problems and need to be replaced. 2.
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TS05-IDU: Open circuit or short circuit of indoor temperature sensor(T1, T2) diagnosis and solution Description: If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED displays the failure code. Recommended parts to prepare: • Connection wires •...
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TS05-ODU: Open circuit or short circuit of outdoor temperature sensor(T3, T4, TP, T2B,TH) diagnosis and solution Description: If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED displays the failure code. Recommended parts to prepare: • Connection wires •...
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TS06-INV: Refrigerant Leakage Detection diagnosis and solution Description: Define the evaporator coil temperature T2 of the compressor just starts running as Tcool. In the beginning 5 minutes after the compressor starts up, if T2 < Tcool-1°C(1.8°F) does not keep continuous 4 seconds and compressor running frequency higher than 50Hz does not keep for 3 minutes, and this situation happens 3 times, the LED displays the failure code and the AC turns off.
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TS07: Indoor PCB / Display board communication error diagnosis and solution Description: Indoor PCB does not receive feedback from the display board. Recommended parts to prepare: • Communication wire • Indoor PCB • Display board Troubleshooting and repair: Power off, then restart the unit 2 minutes later Is it still displaying the error code? The unit functions normally...
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TS08-S: Current overload protection diagnosis and solution Description: An abnormal current rise is detected by checking the specified current detection circuit. Recommended parts to prepare: • Connection wires • Reactor • Outdoor fan • Outdoor PCB Troubleshooting and repair: Was the protection activated Was the protection activated in standby? in standby?
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TS09-S: IPM malfunction or IGBT over-strong current protection diagnosis and solution Description: When the voltage signal the IPM sends to the compressor drive chip is abnormal, the LED displays the failure code and the AC turns off. Recommended parts to prepare: •...
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Index: 1. IPM Continuity Check WARNING Electricity remains in capacitors even when the power supply is off. Ensure the capacitors are fully discharged before troubleshooting. 1. Turn off outdoor unit and disconnect power supply. 2. Discharge electrolytic capacitors and ensure all energy-storage unit has been discharged. 3.
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4. Compressor check Disconnect the compressor and check the resistance between U-V, V-W and U-W, and all 3 values should be equal. If not, the compressor is faulty and should be replaced. Note: The picture and the value are only for reference, actual condition and specific value may vary. Troubleshooting ...
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TS10-S: Over voltage or too low voltage protection diagnosis and solution Description: Abnormal increases or decreases in voltage are detected by checking the specified voltage detection circuit. Recommended parts to prepare: • Power supply wires • IPM module board • PCB •...
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TS11-S-INV: Top temperature protection of compressor or High temperature protection of IPM module or High pressure protection diagnosis and solution Description: For some models with overload protection, If the sampling voltage is not 5V, the LED will display the failure. If the temperature of IPM module is higher than a certain value, the LED displays the failure code.
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Check the fastening screws on the PCB and IPM radiator. Replace the outdoor Are they fixed tightly? control PCB. Tighten the screws and apply silicon grease. Note: For certain models, outdoor PCB could not be removed separately. In this case, the outdoor electric control box should be replaced as a whole.
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High pressure protection High pressure protection Are the high pressure switch Are the high pressure switch Connect high pressure switch and Connect high pressure switch and and main control boar wired and main control boar wired mian control board mian control board correctly? correctly? Is the high pressure...
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TS12-S: Inverter compressor drive error diagnosis and solution Description: An abnormal inverter compressor drive is detected by a special detection circuit, including communication signal detection, voltage detection, compressor rotation speed signal detection and so on. Recommended parts to prepare: • Connection wires •...
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TS13-INV: Low pressure protection diagnosis and solution Description: Outdoor pressure switch cut off the system because low pressure is lower than 0.13 MPa, the LED displays the failure code. Recommended parts to prepare: • Connection wires • Outdoor PCB • Low pressure protector •...
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Low pressure protection Low pressure protection Are the low pressure protector Are the low pressure protector and main control board wired and main control board wired Reconnect the low pressure protector and main Reconnect the low pressure protector and main properly? properly? control board...
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TS14: Indoor units mode conflict (match with multi outdoor unit) Description: The indoor units cannot work cooling mode and heating at same time. Heating mode has a priority. • Suppose Indoor unit A working in cooling mode or fan mode, and indoor unit B is set to heating mode, then A will change to off and B will work in heating mode.
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TS33: Communication error between outdoor main chip and compressor driven chip diagnosis and solution Description: The main chip cannot detect the compressor driven chip Recommended parts to prepare: • Outdoor main PCB • Electric control box Troubleshooting and repair: Shut off the power supply and Shut off the power supply and turn it on 2 minutes later.
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8. Check Procedures 8.1 Temperature Sensor Check WARNING Be sure to turn off all power supplies or disconnect all wires to avoid electric shock. Operate after compressor and coil have returned to normal temperature in case of injury. 1. Disconnect the temperature sensor from PCB (Refer to Chapter 5&6. Indoor&Outdoor Unit Disassembly). 2.
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Note: The picture and the value are only for reference, actual condition and specific value may vary. 8.3 IPM Continuity Check WARNING Electricity remains in capacitors even when the power supply is off. Ensure the capacitors are fully discharged before troubleshooting. 1.
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Note: The picture and the value are only for reference, actual condition and specific value may vary. Troubleshooting Troubleshooting 48...
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Appendix Contents Temperature Sensor Resistance Value Table for T1, T2, T3, and T4 (°C – K) ..2 Temperature Sensor Resistance Value Table for TP (for some units)(°C --K) ..3 iii) Pressure On Service Port ..................4...
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i) Temperature Sensor Resistance Value Table for T1,T2,T3 and T4 (°C – K) °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm 115.266 12.6431 2.35774 0.62973 108.146 12.0561 2.27249 0.61148 101.517 11.5 2.19073 0.59386 96.3423 10.9731...
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ii) Temperature Sensor Resistance Value Table for TP(for some units) (°C --K) °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm...
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