Page 1 DUCTLESS WALL-MOUNT MINI SPLIT INVERTER+ AND INVERTER++ AIR CONDITIONER / HEAT PUMP SYSTEM QUANTUM INVERTER SERIES (WYS-20, WYS-22, Single-Zone) SERVICE & TROUBLESHOOTING MANUAL (FOR USE BY QUALIFIED PERSONNEL ONLY) INVERTER Model Numbers Encompassed: 20 SEER Series (WYS-20, Quantum Inverter+): WYS009AMFI20RL (comprised of YN009AMFI20RPD + WS009AMFI20HLD)
Page 2 Table of Contents §. Safety Precautions Precautions Information Disclosures (For flammable materials) §. Specifications Model Reference Pipe Length and Drop Height Refrigerant Cycle Diagrams Electrical Wiring Diagrams §. Product Features Display Function Safety Features Basic Features Optional Features §. Maintenance First Time Installation Check Refrigerant Recharging Re-Installation...
Page 3 Table of Contents §. Troubleshooting Safety Caution General Troubleshooting Complain Record Form 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 –...
Page 4 Safety Precautions Contents Precautions............................2 Information Disclosures (For flammable materials)............3...
Page 5 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 condenser and evaporator.
Page 6 2. Information Disclosures • Prior to work taking place, the area around the equipment is to be surveyed to make sure that there are no flammable (For flammable materials) hazards or ignition risks. • NO SMOKING signs shall be displayed. Checks to the area Ventilated area •...
Page 7 • 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;...
Page 8 • 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;...
Page 9 • 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.
Page 10 Specifications Contents Model Reference..........................2 Pipe Length and Drop Height......................3 Refrigerant Cycle Diagrams......................4 Electrical Wiring Diagrams......................8...
Page 11 Model Reference Refer to the following table to determine the specific indoor and outdoor unit model. Outdoor Unit Model Indoor Unit Model Capacity (Btu/h) Power Supply YN009GMFI22RPE WS009GMFI22RPE 9,000 YN009GMFI20RPD WS009GMFI20RPD YN012GMFI22RPE WS012GMFI22RPE 12,000 YN012GMFI20RPD WS012GMFI20RPD YN018GMFI22RPE WS018GMFI22RPE 208/230V~, 60Hz, 18,000 1Phase YN018GMFI20RPD...
Page 12 2. Pipe Length, Adjustment Charge, and Drop Height The length and elevation of connection pipe are shown in the table below. If the pipe length exceeds or falls below* the standard pipe length range, refrigerant should be adjusted to ensure nominal cooling/heating capacity. Capacity(Btu/h) Standard Length Max Pipe Length...
Page 13 3. Refrigerant Cycle Diagrams YN009AMFI20RPD, YN012AMFI20RPD, YN009GMFI20RPD, YN012GMFI20RPD YN018GMFI20RPD Specifications  ...
Page 14 YN009AMFI22RPE, YN012AMFI22RPE, YN009GMFI22RPE, YN012GMFI22RPE Only for YN012AMFI22RPE, there is an Accumulator. YN018GMFI22RPE Specifications  ...
Page 15 YN024GMFI20RPD YN024GMFI22RPE, YN030GMFI20RPD Specifications  ...
Page 16 YN036GMFI20RPD Specifications  ...
Page 17 4. Electrical Wiring Diagrams Indoor and Outdoor Unit Wiring Diagram Outdoor Unit Indoor Unit ODU Model ODU Wiring Diagram IDU Model IDU Wiring Diagram YN009AMFI22RPE WS009AMFI22HLE WS012AMFI22HLE YN012AMFI22RPE 22000035851 WS009AMFI20HLD YN009AMFI20RPD YN012AMFI20RPD WS012AMFI20HLD YN009GMFI22RPE WS009GMFI22HLE WS012GMFI22HLE YN012GMFI22RPE YN009GMFI20RPD WS009GMFI20HLD 22000035853 22000019694 WS012GMFI20HLD YN012GMFI20RPD...
Page 18 Outdoor Unit PCB (Printed Circuit Board) Diagram Outdoor Unit ODU Model ODU Printed Circuit Board ODU IPM Printed Circuit Board YN009AMFI22RPE YN012AMFI22RPE 22000047115 YN009AMFI20RPD YN012AMFI20RPD YN009GMFI22RPE YN012GMFI22RPE 22000048121 YN009GMFI20RPD YN012GMFI20RPD 22000046453 YN018GMFI20RPD YN018GMFI22RPE 22000048064 YN024GMFI22RPE YN024GMFI20RPD YN030GMFI20RPD 22000047742 YN036GMFI20RPD Specifications 9 ...
Page 19 Indoor Unit Abbreviations Abbreviation Definition Yellow-Green Conductor Positive and Negative Ion Generator Capacitor PLASMA Electronic Dust Collector LINE NEUTRAL Indoor Room Temperature Coil Temperature of Indoor Heat Exchanger Outdoor Unit Abbreviations Abbreviation Definition 4-WAY Gas Valve Assembly/4-WAY VALVE AC-FAN Alternating Current FAN DC-FAN Direct Current FAN AC Current Detector...
Page 20 Indoor Unit Wiring Diagram: 22000019694 ALL INDOOR UNIT MODELS Specifications  ...
Page 21 Outdoor Unit Wiring Diagram: 22000035851 YN009AMFI22RPE, YN012AMFI22RPE, YN009AMFI20RPD, YN012AMFI20RPD Specifications  ...
Page 22 Outdoor Unit Wiring Diagram: 22000035853 YN009GMFI22RPE, YN012GMFI22RPE, YN009GMFI20RPD, YN012GMFI20RPD Specifications  ...
Page 23 Outdoor Unit Wiring Diagram: 22000035849 YN018GMFI22RPE, YN024GMFI22RPE, YN024GMFI20RPD Specifications  ...
Page 24 Outdoor Unit Wiring Diagram: 22000036331 YN030GMFI20RPD, YN036GMFI20RPD BLACK BLUE COMP_ TOP OPTIOna l CN3 2 CN2 9 CN3 0 CN2 6 CN4 2 CN1 6 BLACK BLUE BLUE CN2 0 OPTIONAL HE AT1 CN 8 BLACK CN2 1 WHITE OPTIONAL HE AT2 CN3 6 BLACK...
Page 25 Outdoor Unit Wiring Diagram: 22000047115 YN009AMFI22RPE, YN012AMFI22RPE, YN009AMFI20RPD, YN012AMFI20RPD Specifications  ...
Page 26 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...
Page 27 Outdoor Unit Wiring Diagram: 22000048121, 22000046453 YN009GMFI22RPE, YN012GMFI22RPE, YN009GMFI20RPD, YN012GMFI20RPD, YN018GMFI20RPD Specifications  ...
Page 28 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.
Page 29 Outdoor Unit Wiring Diagram: 22000048064 YN018GMFI22RPE, YN024GMFI22RPE, YN024GMFI20RPD RC 2 VU B Specifications  ...
Page 30 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...
Page 31 Outdoor Unit Wiring Diagram: 22000047742 YN030GMFI20RPD, YN036GMFI20RPD Specifications  ...
Page 32 Name Meaning CN11 N_in: connect to N-line (208-230V AC input) Power Supply CN12 L_in: connect to L-line (208-230V AC input) EEV-A CN16 EEV-B CN13 EEV-C EEV-D CN15 connect to electric expansion valve EEV-E EEV-F CN17 EEV-G CN14 connect to pipe temp. sensor T3, ambient temp. sensor T4, exhaust T3 T4 TP CN26 temp.
Page 33 Name Meaning HEAT_D CN20 connect to the heater, 208-230V AC when is ON CN21 HEAT_Y CN36 4-WAY CN38 connect to 4 way valve, 208-230V AC when is ON. CN27 connect to key board CN1 Note: This section is for reference only. Please take practicality as standard. Specifications ...
Page 34: Table Of Contents
Product Features Contents Display Function ........................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 .........................7 3.10 Auto-Restart Function ......................7 3.11 Refrigerant Leakage Detection ..................8...
Page 35: Display Function
Display Function Unit display functions Display Function Fresh(available on select units only) Defrost When the unit is on When TIMER is on ECO function (available on select units only) Lights up in different color according to the operation mode(some units)： Under COOL and DRY mode, it displays as cool color.
Page 36: Safety Features
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.
Page 37: Basic Functions
3. Basic Functions Table Cooling Mode & Heating mode Heating Mode Functions Auto Mode Outdoor Fan Control Defrosting Mode Case 1: Case 1:T3 and Case 2: A=2°C(3.6°F), Cases Compressor Case 2:T4 T4,15 min T3,10 min B=-2°C(-3.6°F) Frequency and T4 YN009AMFI20RPD YN012AMFI20RPD YN009AMFI22RPE YN012AMFI22RPE...
Page 38: Abbreviation
Abbreviation • 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 °C(°F) Actual fan speed...
Page 39 parameter of EEPROM. Its value ranges from -6°C to 6°C. T1-Td • When T1-Ts>-ΔT3, the compressor ceases operation. • When T1-Ts<-ΔT3-1.5°C (2.7 °F), the compressor continues operation. • When the AC is operating in mute mode, the compressor operates at a low frequency. •...
Page 40: Auto-Mode
• If any one of the following conditions is satisfied, • Forced auto mode: defrosting ends and the machine switches to normal Forced auto mode operates the same as normal auto mode heating mode: with a preset temperature of 24°C (76°F). •...
Page 41: Refrigerant Leakage Detection
Follow me failure, will restore those setting automatically within 3 minutes after power returns. • If you press “Follow Me” on the remote, the indoor • If the unit was in forced cooling mode, it will run in unit will beep. This indicates the follow me function is this mode for 30 minutes and turn to auto mode with active.
Page 42 Maintenance Contents First Time Installation Check ......................2 Refrigerant Recharging ........................4 Re-Installation ..........................5 Indoor Unit ...........................5 Outdoor Unit ........................7...
Page 43: First Time Installation Check
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 •...
Page 44 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.
Page 45: Refrigerant Recharging
2. Refrigerant Recharging m A A CO M Procedure: Close both 2- and 3-way valves. Operate the air conditioner in cooling mode to charge the system with liquid refrigerant. Slightly connect the Handle Lo charge hose to the 3-way service port. When the electronic scale displays the correct weight (refer to the gauge and the pressure of the Connect the charge hose to the valve at the bottom...
Page 46: Re-Installation
3. Re-Installation Indoor Unit Capturing the refrigerant into the outdoor unit: Procedure: Confirm that the 2- and 3-way valves are opened. Close the 3-way valve so that the gauge rests between 0.3 MPa (43.5 Psi) and 0.5 MPa (72.5 Psi). Connect the charge hose with the push pin of Handle Disconnect the charge set and mount the caps of Lo to the 3-way valve’...
Page 47 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.
Page 48: Outdoor Unit
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.
Page 49 Refrigerant Charging: m A A CO M 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.
Page 50 Indoor Unit Disassembly Contents Dimension ............................2 Indoor Unit Disassembly(9k~24k)....................3 Front Panel ........................3 Electrical parts .........................9 Evaporator .........................13 Fan motor and fan ......................15 Step motor .........................17 Drain Hose ........................18 Indoor Unit Disassembly(30k~36k)..................19 Front Panel ........................19 Electrical parts .......................26 Evaporator ........................29 Fan motor and fan ......................31 Step motor ........................32 Drain Hose ........................34...
Page 51 Dimensions Capacity Size Class W (in.) D (in.) H (in.) 28”-3/8 7”-3/8 11”-3/8 31”-5/8 9K~12K 7”-1/2 11”-3/4 38” 8”-1/2 12”-1/2 42”-1/2 18K~24K 8”-7/8 13”-1/4 49”-5/8 30K~36K 11”-1/8 14”-1/4 Size Class A: WS009AMFI20HLD / WS009GMFI20HLD Size Class B: WS009GMFI22HLE / WS012GMFI22HLE / WS009AMFI22HLE / WS012AMFI22HLE / WS012AMFI20HLD / WS012GMFI20HLD Size Class C: WS018GMFI20HLD Size Class D:...
Page 52 2. Indoor Unit Disassembly (9,000 ~ 24,000 BTU) 2.1. Front Panel Disassembly Procedure Illustration 1) Hold the front panel by the tabs on Front Panel the both sides and lift it (see Fig. 1). Figure 1 2) Push up the bottom of an air filter (step 1), and then pull it out downwards (step 2) (see Fig.
Page 53 Procedure Illustration 3) Open the horizontal louver and push the hook towards left to open it (see Figure 3). Horizontal Louver Hook Figure 3 4) Bend the horizontal louver lightly by both hands to loosen the hooks, then remove the horizontal louver (see Figure 4).
Page 54 Procedure Illustration 5) Pry the electrical cover by a screw driver, and rotate it towars left, then remove it (see Fig. 5). Figure 5 6) Disconnect the connector for display board (see Fig. 6). Figure 6 Note: This section is for reference only. Actual unit appearance may vary. Indoor Unit Disassembly ...
Page 55 Procedure Illustration 7) Slid the front panel side to side to release each axis (see Fig. 7 ). Figure 7 8) Open the screw cap and then remove the 3 screws (see Fig. 8). Figure 8 Note: This section is for reference only. Actual unit appearance may vary. Indoor Unit Disassembly ...
Page 56 Procedure Illustration 9) Release the hooks with hands . (see Fig. 9). Figure 9 10) Release the 5 hooks in the back (see Fig. 10). Figure 10 11) Pull out the panel frame while pushing the hook through a clearance between the panel frame and the heat exchanger (see Fig.
Page 57 Procedure Illustration 12) Release the 5 hooks of the vertical blades, then pull the vertical blades rightward and remove it (see Fig. 12). Figure 12 13) Remove 1 screw of the display board. (see Fig. 13). 14) Rotate the display board in the direction shown in the right picture.
Page 58 2.2. Electrical Parts Disassembly (Antistatic gloves must be worn.) Note: Remove the front panel (refer to 2.1. Front Panel Disassembly) prior to disassembling electrical parts. Procedure Illustration Ground Screws 1) Cut the ribbon with a cutter, then pull out the coil temperature sensor (T2) (see Fig.
Page 59 Procedure Illustration 4) Remove the fixed devices of the connectors (see Fig. 16). Figure 16 5) Disconnect the connectors of fan motor, the step motor and the T2 sensor (see Fig. 17). Figure 17 6) Open the left side plate of electronic control box (see Fig.
Page 60 Procedure Illustration 7) Open the two clips on the front of the electric box (see Fig. 19). Figure 19 8) Open the upper cover plate of electronic control box (see Fig. 20). Figure 20 Note: This section is for reference only. Actual unit appearance may vary. Indoor Unit Disassembly ...
Page 61 Procedure Illustration 9) Remove 1 screw and open the 2 clips along the direction indicated in right image (see Fig. 21). Figure 21 Display Board 10) Pull out the electrical main board along the direction indicated in right image to remove it (see Fig. 22). Terminal (1L) Terminal (W) Terminal (S)
Page 62 2.3. Evaporator Disassembly Note: Remove the front panel and electrical parts (refer to 2.1. Front Panel Disassembly and 2.2. Electrical Parts Disassembly) before disassembling the evaporator. Procedure Illustration 1) Disassemble the pipe holder located at the rear of the unit (see Fig. 23). Figure 23 2) Remove the 1 screw on the evaporator located at the fixed plate (see Fig.
Page 63 Procedure Illustration Release the hook on the evaporator (see Fig. 25). Figure 25 Remote the one screw on the evaporator located at the fixed plate (see Fig. 26). Figure 26 5) Pull out the evaporator (see Fig. 27). Figure 27 Note: This section is for reference only.
Page 64 2.4. Fan Motor and Fan Disassembly Note: Remove the front panel, electrical parts and evaporator (refer to 2.1. Front Panel Disassembly, 2.2. Electrical Parts Disassembly, and 2.3. Evaporator Disassembly) prior to disassembling fan motor and fan. Procedure Illustration 1) Remove the two screws and remove the cover of the fan motor (see Fig.
Page 65 Procedure Illustration 3) Remove the fastening screw (see Fig. 30). 4) Pull out the fan motor and fan assembly from the side. Figure 30 Fastening Screw Note: This section is for reference only. Actual unit appearance may vary. Indoor Unit Disassembly ...
Page 66 2.5. Step Motor Disassembly Note: Remove the front panel and electrical parts (refer to 2.1. Front Panel Disassembly, 2.2. Electrical Parts Disassembly) before disassembling step motor. Procedure Illustration 1) Remove the two screws, then remove the step motor (see Fig. 31). Step Motor Figure 31 Note: This section is for reference only.
Page 67 2.6. Drain Hose Removal Procedure Illustration 1) Rotate the fixed wire clockwise as depicted in right-hand image (see Fig. 32). Figure 32 2) Pull up the drain hose to remove it (see Fig. 33). Figure 33 Note: This section is for reference only. Actual unit appearance may vary. Indoor Unit Disassembly ...
Page 68: Indoor Unit Disassembly(9K~24K)
3. Indoor Unit Disassembly (30,000 ~ 36,000 BTU) 3.1. Front Panel Procedure Illustration 1) Hold the front panel by the tabs on the both sides and lift it (see Fig. 1). Figure 1 Push up the bottom of an air filter (step 1), and then pull it out downwards (step 2) (see Fig.
Page 69 Procedure Illustration 3) Open the horizontal louver(below) and bend the louver lightly to loosen the leftmost hook, then push the hook towards right to loosen the second hook (see Fig. 3). 4) Remove the horizontal louver(below) towards the left (see Fig. 3). Figure 3 5) Remove the horizontal louver(above) with the same way (see Fig.
Page 70 Procedure Illustration 6) Pry the electrical cover using a screw driver, and rotate it towards left, then remove it (see Fig. 5). Figure 5 7) Pull out the connector wire, and then disconnect the connector for display board (see Fig. 6). Figure 6 Note: This section is for reference only.
Page 71 Procedure Illustration 8) Slid the front panel side to side to release each axis (see Fig. 7). Figure 7 9) Open the screw caps and then remove the 4 screws (see Fig. 8). 10) Remove the 4 screws ﬁxing the panel frame (see Fig.
Page 72 Procedure Illustration 11) Release the hooks with hands . (see Fig. 9). Figure 9 12) Release the 5 hooks in the back (see Fig. 10). Figure 10 Note: This section is for reference only. Actual unit appearance may vary. Indoor Unit Disassembly ...
Page 73 Procedure Illustration 13) Pull out the panel frame while pushing the hook through a clearance between the panel frame and the heat exchanger (see Fig. 11). Figure 11 14) Remove 1 screw of the display board. (see Fig. 12). Figure 12 Note: This section is for reference only.
Page 74 Procedure Illustration 15) Rotate the display board in the direction shown in the right picture Fig. 13). (see Figure 13 16) Remove 1 screw of the wiﬁ module (see Fig. 14). Figure 14 17) Rotate the wiﬁ module in the direction shown in the right picture (see Fig.
Page 75: Electrical Parts
3.2. Electrical Parts Disassembly (Antistatic gloves must be worn.) Note: Remove the front panel (refer to 3.1. Front Panel Disassembly) prior to disassembling electrical parts. Procedure Illustration 1) Remove 2 fastening screws of the electrical control box subassembly (see Fig. 16). Figure 16 2) Disconnect the connectors (see Fig.
Page 76 Procedure Illustration 3) Cut the ribbon with a cutter, then pull out the coil temperature sensor (T2) (see Fig. 18). 4) Remove one fastening screw of the electronic control box and two screws used for the ground connection (see Fig. 18). 5) Remove fixed clamp of temperature sensor (see Fig.
Page 77 Procedure Illustration 6) Pull out the electrical main board along the direction indicated in right image (see Fig. 19). Figure 19 7) Disconnect the connectors and remove main control board (see Fig. 20). Figure 20 Note: This section is for reference only. Actual unit appearance may vary. Indoor Unit Disassembly 28...
Page 78: Evaporator
3.3. Evaporator Disassembly Note: Remove the front panel and electrical parts (refer to 3.1. Front Panel Disassembly and 3.2. Electrical Parts Disassembly) before disassembling the evaporator. Procedure Illustration 1) Disassemble the pipe holder located at the rear of the unit (see Fig. 21). Figure 21 2) Remove the 3 screws on the evaporator located at the ﬁxed plate (see Fig.
Page 79 Procedure Illustration 3) Remove the 4 screws of the fan motor cover (see Fig. 23). Figure 23 4) Pull out the evaporator (see Fig. 24). Figure 24 Note: This section is for reference only. Actual unit appearance may vary. Indoor Unit Disassembly 30...
Page 80 3.4. Fan Motor and Fan Disassembly Note: Remove the front panel, electrical parts and evaporator (refer to 3.1. Front Panel Disassembly, 3.2. Electrical Parts Disassembly, and 3.3. Evaporator Disassembly) prior to disassembling fan motor and fan. Procedure Illustration 1) Remove the bearing sleeve (see Fig. 25). Figure 25 2) Remove the fastening screw (see Fig.
Page 81: Step Motor
3.5. Step Motor Disassembly Note: Remove the front panel and electrical parts (refer to 3.1. Front Panel Disassembly, 3.2. Electrical Parts Disassembly) before disassembling step motor. Procedure Illustration 1) Remove the 3 screws, then remove the horizontal swing motor(above)(see Fig. 27). Figure 27 2) Remove the 2 screws, then remove the horizontal swing motor(below)(see...
Page 82 Procedure Illustration (for some units) 4) Remove 1 screw, then remove the Positive and negative ion generator (see Fig. 29). Figure 29 (for some units) 5) Remove 2 screws, then remove the vertical swing motor (see Fig. 30). Figure 30 Note: This section is for reference only.
Page 83 3.6. Drain Hose Removal Procedure Illustration 1) Pull up the drain hose to remove it (see Fig. 31). Figure 31 Note: This section is for reference only. Actual unit appearance may vary. Indoor Unit Disassembly 34 ...
Page 84 Outdoor Unit Disassembly Contents Outdoor Unit Matching Table ......................2 Outdoor Unit Dimensions ......................3 Outdoor Unit Disassembly ......................7 Panel Plate Disassembly ....................7 Electrical Components Disassembly ................16 Fan Assembly Disassembly ..................20 Insulation Blanket Removal ..................22 Four-Way Valve Removal ....................23 Compressor Removal....................24...
Page 85: Outdoor Unit Matching Table
Outdoor Unit Table Outdoor Unit Panel Type and PCB Matching Table Refer to the following table to determine the reference plate and PCB configuration for each outdoor unit model. Outdoor Unit Model Panel Plate Type PCB Configuration Power Supply YN009GMFI22RPE YN009GMFI20RPD EW-1 PT-1...
Page 86: Outdoor Unit Dimensions
2. Outdoor Unit Dimensions 2.1 Outdoor Unit Dimensions of Panel Plate PT-1 Scope of Models Covered: YN009GMFI22RPE / YN009GMFI20RPD / YN012GMFI22RPE / YN012GMFI20RPD YN009AMFI22RPE / YN009AMFI20RPD / YN012AMFI22RPE / YN012AMFI20RPD 30”-7/8 (784) 11”-15/16 (303) 30”-1/8 (765) 32”-7/8 (835) 17”-13/16 (452) 11/16”...
Page 87 2.2 Outdoor Unit Dimensions of Panel Plate PT-2 Scope of Models Covered: YN018GMFI20RPD 13” (330) 7/16” (11.4) 20”-1/8 (511) 31”-11/16 (805) 34”-7/16 (874) R1” (R26) 17”-11/16 (449) R3/16” (R5) 1”-15/16 (49) 1”-5/16 (32.7) Outdoor Unit Disassembly  ...
Page 88 2.3 Outdoor Unit Dimensions of Panel Plate PT-3 Scope of Models Covered: YN018GMFI22RPE / YN024GMFI20RPD 35”-1/4 (895) 26”-1/8 (663) 35”-1/16 (890) 13”-7/16 (342) 37”-5/8 (955) 2”-3/8 (61) 2”-15/16 (74) 1/2” (12) Outdoor Unit Disassembly  ...
Page 89 2.4 Outdoor Unit Dimensions of Panel Plate PT-4 Scope of Models Covered: YN024GMFI22RPE / YN030GMFI20RPD / YN036GMFI20RPD 40”-9/16 (1030) 37”-1/4 (946) 7”-3/8 (188) 16”-1/8 (410) 26”-1/2 (673) 3”-9/16 (91) 18”-1/8 (461) 2”-7/8 (73) 15/16” (24) R3/8” (R10) R1/4” (R6) Outdoor Unit Disassembly ...
Page 90: Outdoor Unit Disassembly
3. Outdoor Unit Disassembly 3.1. Panel Plate Disassembly 3.1.1. Panel Plate Disassembly (PT-1, PT-2) Scope of Models Covered: YN009GMFI22RPE / YN009GMFI20RPD / YN012GMFI22RPE / YN012GMFI20RPD / YN018GMFI20RPD YN009AMFI22RPE / YN009AMFI20RPD / YN012AMFI22RPE / YN012AMFI20RPD Procedure Illustration 1) Turn off the air conditioner and the power breaker.
Page 91 Procedure Illustration 4) Remove the screws of the valve cover and then remove the valve cover (2 screws) (see Fig. 3). Valve Cover Figure 3 5) Remove the screws of the front panel and then remove the front panel (9 screws) (see Fig. 4). Front Panel Figure 4 Note: This section is for reference only.
Page 92 Procedure Illustration 6) Remove the screws of the right panel and then remove the right panel (5 screws) (see Fig. 5). Right Panel Figure 5 Note: This section is for reference only. Actual unit appearance may vary. Outdoor Unit Disassembly ...
Page 93 3.1.2. Panel Plate Disassembly (PT-3) Scope of Models Covered: YN018GMFI22RPE / YN024GMFI20RPD 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 (1-3 screws) (see Fig. 1). Big Handle (Some Models) 3 Screws Figure 1...
Page 94 Procedure Illustration 4) Remove the screws of the valve cover and then remove the valve cover (2 screws) (see Fig. 3). Valve Cover Figure 3 5) Remove the screws of the front panel and then remove the front panel (9 screws) (see Fig. 4). Front Panel Figure 4 Note: This section is for reference only.
Page 95 Procedure Illustration 6) Remove the screws of the right panel and then remove the right panel (6 screws) (see Fig. 5). Right Panel Figure 5 Note: This section is for reference only. Actual unit appearance may vary. Outdoor Unit Disassembly ...
Page 96 3.1.3. Panel Plate Disassembly (PT-4) Scope of Models Covered: YN024GMFI22RPE / YN030GMFI20RPD / YN036GMFI20RPD Procedure Illustration 1) Turn off the air conditioner and the Big Handle power breaker. 2) Remove the screws of the big handle and then remove the big handle (2-3 screws) (see Fig.
Page 97 Procedure Illustration 4) Remove the screws of the front right panel and then remove the front right panel (2 screws) (see Fig. 3). Front Right Panel Figure 3 5) Remove the screws of the front panel and then remove the front panel (9 screws) (see Fig.
Page 98 Procedure Illustration 6) Remove the screws of the valve cover and then remove the valve cover (2 screws) (see Fig. 5). Valve Cover Figure 5 7) Remove the screws of the right panel and then remove the right panel (8 screws) (see Fig. 6). Right Panel Figure 6 Note: This section is for reference only.
Page 99: Electrical Components Disassembly
Electrical Components Disassembly Antistatic gloves must be worn when you disassemble the electronic box. WARNING: Note: Remove the air outlet grille (refer to 3.1 Panel Plate Disassembly) prior to disassembling electrical parts. 3.2.1. Electronic Control Box Subassembly Removal (EW-1, EW-2) Scope of Models Covered: YN009GMFI22RPE / YN009GMFI20RPD / YN012GMFI22RPE / YN012GMFI20RPD / YN018GMFI20RPD YN009AMFI22RPE / YN009AMFI20RPD / YN012AMFI22RPE / YN012AMFI20RPD...
Page 100 3.2.2. Electronic Control Box Subassembly Removal (EW-3) Scope of Models Covered: YN018GMFI22RPE / YN024GMFI20RPD / YN024GMFI22RPE Procedure Illustration 1) Remove the 5 screws, and release two hooks, then remove the electronic control box subassembly. see Fig. 1). Note: Electric control box cover cannot be removed.
Page 101 3.2.3. Electronic Control Box Subassembly Removal (EW-4) Scope of Models Covered: YN030GMFI20RPD / YN036GMFI20RPD Procedure Illustration 1) Release the hooks, and then open the cover (4 hooks total)(see Fig. 1). Figure 1 2) Remove 6 screws on the electronic control board and then remove the electronic control box subassembly (see Fig.
Page 102 Procedure Illustration 3) Pull out the connector, remove one screw and then remove the key board subassembly on terminal board. (see Fig. 3). Figure 3 Note: This section is for reference only. Actual unit appearance may vary. Outdoor Unit Disassembly ...
Page 103: Fan Assembly Disassembly
Fan Assembly Disassembly 3.3.1. Fan Blade Removal Note: Remove the air outlet grille (refer to 3.1 Panel Plate Disassembly) prior to disassembling fan parts. Procedure Illustration 1) Remove the nut securing the fan with a spanner (see Fig. 1). 2) Remove the fan blade. Figure 1 Note: This section is for reference only.
Page 104 3.3.2. Fan Motor Removal Note: Remove the panel plate and the connection of fan motor on PCB (refer to 3.1 Panel Plate Disassembly and 3.2 Electrical Components Disassembly) prior to disassembling fan motor. Procedure Illustration 3) Remove the fastening screws of the fan motor (4 screws) (see Fig.
Page 105: Insulation Blanket Removal
Insulation Blanket Removal Note: Remove the panel plate (refer to 3.1 Panel Plate Disassembly) before removing the insulation blanket. Procedure Illustration 1) Remove the insulation blanket (side and top) (see Fig. 1). Insulation Blanket(Top) (Applicable to models with blanket) Insulation Blanket(Side) (Applicable to models with blanket) Figure 1 Note: This section is for reference only.
Page 106: Four-Way Valve Removal
Four-Way Valve Removal WARNING: Evacuate the system and conﬁrm that there is no refrigerant left in the system before removing the four-way valve and the compressor. (The operation below should be performed by professionals.) (For R32/R290 systems, evacuate the system with the vacuum pump, flush the system with nitrogen, and repeat those two steps prior to heating up the brazed parts.) Note: Remove the panel plate, connection of four-way valve on PCB (refer to 3.1 Panel Plate Disassembly and 3.2 Electrical Components Disassembly), and insulation blanket, prior to disassembling the four-way valve.
Page 107: Compressor Removal
Compressor Removal WARNING: Evacuate the system and conﬁrm that there is no refrigerant left in the system before removing the four-way valve and the compressor. (The operation below should be performed by professionals.) (For R32/R290 systems, evacuate the system with the vacuum pump, flush the system with nitrogen, and repeat those two steps prior to heating up the brazed parts.) Note: Remove the panel plate, connection of four-way valve on PCB (refer to 3.1 Panel Plate Disassembly and 3.2 Electrical Components Disassembly), and insulation blanket, prior to disassembling the compressor.
Page 108 Procedure Illustration 3) Remove the hex nuts and washers that secure the compressor, located on the bottom plate (see Fig. 3). Figure 3 Suction Pipe 4) Heat up the brazed parts and then remove the discharge pipe as well as the suction pipe (see Fig.
Page 109 Troubleshooting Contents Safety Caution ................................3 General Troubleshooting ............................4 Complain Record Form ............................. 7 Information Inquiry ..............................9 Error Diagnosis and Troubleshooting Without Error Code ................12 Remote Maintenance ..........................12 Field Maintenance ............................13 Quick Maintenance by Error Code ........................18 Troubleshooting by Error Code ..........................E0/EH 00/ EH 0A / F4/EC 51 (EEPROM parameter error diagnosis and solution) ....
Page 110 Troubleshooting Contents F0/PC 08 (Current overload protection diagnosis and solution) ........... P0/PC 00 (IPM malfunction or IGBT over-strong current protection diagnosis and solution) ..............................30 7.10 P1/PC 01 (Over voltage or too low voltage protection diagnosis and solution) ....7.11 P2/PC 02 (High temperature protection of IPM module or High pressure protection diagnosis and solution) ....................32 P4/PC 04 (Inverter compressor drive error diagnosis and solution) ........
Page 111: Safety Caution
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. Ensure the capacitors are fully discharged before troubleshooting.
Page 112: General Troubleshooting
2. General Troubleshooting Error Display (Indoor Unit) When the indoor unit encounters a recognized error, the operation lamp will ﬂash in a corresponding series, the timer lamp may turn on or begin ﬂashing, and an error code will be displayed. These error codes are described in the following tables: Operation Timer...
Page 113 For some models Operation Timer Error Information Solution Lamp Lamp Display EH 00/ 1 time Indoor unit EEPROM parameter error TS19 EH 0A 2 times Indoor / outdoor unit communication error TS20 EL 01 3 times Zero-crossing signal detection error(for some models) TS22 EL 02 4 times...
Page 114 LED Flash Frequency: ..Error Display (For Some Outdoor Units) There are 2 LED lights (RED color and GREEN color) welded in outdoor main board. After power on, LED show different actions when encounter different problems. Problem LED(GREEN) LED(RED) Solution Standby normally Operate normally...
Page 115: Complain Record Form
3. Complaint Record Form Complaint 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 □Fan only □Cooling...
Page 116 Parameter Checking information by Remote controller Displaying code Displaying code meaning Display value Display value meaning Room temperature 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...
Page 117: Information Inquiry
4. Information Inquiry • To enter information inquiry status, complete the following procedure within ten seconds: 1. Press LED(or DO NOT DISTURB) 3 times. 2. 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.
Page 118 Displayed Displayed code Explanation Meaning Additional Notes value 1. All displayed temperatures Room temperature 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.
Page 119 Displayed Displayed code Explanation Meaning Additional Notes value 0-FF 2-28 Reserved 5-20 5-25 Troubleshooting  ...
Page 120: Error Diagnosis And Troubleshooting Without Error Code
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 prior to field maintenance. Problem Solution Unit will not start...
Page 121: Field Maintenance
Field maintenance Problem Solution Unit will not start TS16 - TS17 Compressor will not start but fans run TS16 - TS17 Compressor and condenser (outdoor) fan will not start TS16 - TS17 Evaporator (indoor) fan will not start TS16 - TS17 Condenser (Outdoor) fan will not start TS16 - TS17 Unit runs, but shortly stops...
Page 122 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 ☆...
Page 123 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 ☆...
Page 124 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 ☆...
Page 125 2.Field Maintenance Electrical Circuit Possible causes of trouble Unit will not start ☆ ☆ ☆ ☆ ☆ ☆ Compressor will not start but fans run ☆ ☆ ☆ ☆ ☆ Compressor and condenser fan will not start ☆ ☆ ☆ Evaporator (Indoor) fan will not start ☆...
Page 126: Quick Maintenance By Error Code
6. Quick Maintenance by Error Code If you do not have the time or tools to test which specific parts are faulty, you can directly change the required parts according to the error code. You can find the parts to replace by error code in the following table. Error Code Part requiring E7/Eb...
Page 127: Troubleshooting By Error Code
7. Troubleshooting by Error Code E0/EH 00/EH 0A / F4/EC 51 (EEPROM parameter error diagnosis and solution) Description: Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip. Recommended parts to prepare: • Indoor PCB • Outdoor PCB Troubleshooting and repair: Shut off the power supply and turn it on 2 minutes later.
Page 128: E1/El 01 (Indoor And Outdoor Unit Communication Error Diagnosis And Solution)
E1/EL 01 (Indoor and outdoor unit communication error diagnosis and solution) Description: Indoor unit cannot 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.
Page 129 Remarks: • Use a multimeter to test the DC voltage between #2 port(or S/L2 port) and #3 port(or N/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). •...
Page 130: E2/Eh 02 (Zero-Crossing Detection Error Diagnosis And Solution)
E2/EH 02 (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 • PCB Troubleshooting and repair: Check the connections and power supply.
Page 131: E3/Eh 03 / F5/Ec 07 (Fan Speed Outside Of The Normal Range Diagnosis And Solution)
E3/EH 03 / F5/EC 07 (Fan speed is operating outside of normal range diagnosis and solution) Description: When indoor / 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: •...
Page 132 Index: 1. Indoor or Outdoor 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 within the range showing in table below, the PCB has faulted and needs to be replaced. •...
Page 133 3. Indoor AC Fan Motor Power on and set the unit running in fan mode at high fan speed. After running for 15 seconds, measure the voltage of pin1 and pin2. If the value of the voltage is less than 100V(208~240V power supply) or 50V (115V power supply), the PCB faulted and needs to be replaced.
Page 134: E4/Eh 60/E5/Eh 61/F1/Ec 53/F2/Ec 52/F3/Ec 54/F6/Ec56 (Open Circuit Or Short Circuit Of Temperature Sensor Diagnosis And Solution)
E4/EH 60/E5/EH 61/F1/EC 53/F2/EC 52/F3/EC 54/F6/EC56 (Open circuit or short circuit of temperature sensor 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: •...
Page 135: E7/Eh 0B (Indoor Pcb / Display Board Communication Error Diagnosis And Solution)
E7/EH 0b (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 The unit functions normally Is it still displaying the error code?
Page 136: Ec/El 0C (Refrigerant Leakage Detection Diagnosis And Solution)
EC/EL 0C (Refrigerant Leakage Detection diagnosis and solution) Description: Define the evaporator coil temperature T2 of the compressor just starts running as Tcool. In the first 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.
Page 137: F0/Pc 08 (Current Overload Protection Diagnosis And Solution)
F0/PC 08 (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 in standby ? Restart the unit when the power...
Page 138: P0/Pc 00(Ipm Malfunction Or Igbt Over-Strong Current Protection Diagnosis And Solution)
P0/PC 00(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: •...
Page 139: P1/Pc 01(Over Voltage Or Too Low Voltage Protection Diagnosis And Solution)
7.10 P1/PC 01(Over voltage or too low voltage protection diagnosis and solution) Description: Abnormal increases or decreases in voltage are detected by the specified voltage detection circuit. Recommended parts to prepare: • Power supply wires • IPM module board • PCB •...
Page 140: P2/Pc 02(High Temperature Protection Of Ipm Module Or High Pressure Protection Diagnosis And Solution)
7.11 P2/PC 02(High temperature protection of IPM module or High pressure protection diagnosis and solution) Description: If the temperature of IPM module is higher than a certain value, the LED displays the failure code. For some models with high pressure switch, outdoor pressure switch cut off the system because high pressure is higher than 638 PSI, and then the LED displays the failure code.
Page 141 High pressure protection Are the high pressure switch Connect high pressure switch and main control board wired and main control board correctly? Is the high pressure protector defective? Method : Disconnect the plug. Measure the resistance of the high pressure protector. If the Replace high pressure protector protector is normal the value is 0.
Page 142: P4/Pc 04(Inverter Compressor Drive Error Diagnosis And Solution)
7.12 P4/PC 04(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: •...
Page 143: P6/Pc 03(High Pressure Protection Or Low Pressure Protection Diagnosis And Solution)
7.13 P6/PC 03(High pressure protection or Low pressure protection diagnosis and solution) Description: Outdoor pressure switch cut off the system because high pressure is higher than 638 PSI or outdoor pressure switch cut off the system because low pressure is lower than 19 PSI, the LED displays the failure code. Recommended parts to prepare: •...
Page 144 Low pressure protection Are the low pressure protector and main control board wired Reconnect the low pressure protector properly ? and main control board Is the low pressure protector defective? Method : Disconnect the plug. Measure the resistance of the Replace low pressure protector low pressure protector.
Page 145: Check Procedures
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 to avoid risk of injury. 1. Disconnect the temperature sensor from PCB (Refer to Chapter 5 & 6, “Indoor & Outdoor Unit Disassembly”). 2.
Page 146 Resistance Value KSK103D33UEZ3 KSN140D21UFZ KSN140D58UFZ KSN98D64UFZ3 KTM240D43UKT KTF250D22UMT Blue-Red 1.86Ω Blue-Black 1.03Ω 0.75Ω 2.13Ω 2.75Ω 1.28Ω Red-Black Reference Table for Outdoor Condensing Unit Compressor Models YN009AMFI22RPE YN009GMFI22RPE KSK103D33UEZ3 YN012AMFI22RPE YN012GMFI22RPE YN009AMFI20RPD YN009GMFI20RPD YN012AMFI20RPD YN012GMFI20RPD KSN98D64UFZ3 KSN140D21UFZ YN018GMFI20RPD KTM240D43UKT YN024GMFI20RPD YN024GMFI22RPE KTF250D22UMT YN030GMFI20RPD YN036GMFI20RPD KSN140D58UFZ...
Page 147 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. Turn off outdoor unit and disconnect power supply. 2. Discharge electrolytic capacitors and ensure all energy-storage unit has been discharged. 3.
Page 148 8.4 Indoor AC Fan Motor Check Power on and set the unit running in fan mode at high fan speed. After running for 15 seconds, measure the voltage of pin1 and pin2. If the value of the voltage is less than 100V(208~240V power supply) or 50V (115V power supply), the PCB has faulted and need to be replaced.
Page 149 8.5 4-way Valve Check 1. Power on the system, and use a digital tester to measure the voltage. When the unit operates in cooling, it is 0V. When the unit operates in heating, it is about 230VAC. If the value of the voltage is not in the range, the PCB has faulted and needs to be replaced. Red Brown Blue Orange Yellow White 2.
Page 150 8.6 EXV Check WARNING Electricity remains in capacitors even when the power supply is off. Ensure the capacitors are fully discharged before troubleshooting. 1. Disconnect the connector from outdoor PCB. 2. Measure the resistance value of each winding using a multi-meter. 3.
Page 151 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...
Page 152 i) Temperature Sensor Resistance Value Table for T1,T2,T3 and T4 (°C – °F - 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 2.27249 108.146 12.0561 0.61148 2.19073 101.517 11.5 0.59386...
Page 153 ii) Temperature Sensor Resistance Value Table for TP(for some units) (°C - °F - K) °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm 68.66 13.59 542.7 3.702 65.62 13.11 511.9 3.595 62.73 12.65 3.492 59.98...
Page 154 iii) Pressure On Service Port Cooling chart(R410A): ODU(DB) °F(°C) 0(-17) 5(-15) 95 (35) (-9.44) (7.22) (23.89) (29.44) (40.56) (46.11) (48.89) IDU(DB/WB) 70/59 (21.11/15) 10.1 10.6 75/63 (23.89/17.22) 10.7 11.2 80/67 (26.67/19.44) 11.2 11.9 90/73 (32.22/22.78) 10.5 10.3 10.0 10.6 12.4 13.0 70/59 (21.11/15) 75/63 (23.89/17.22)
Page 155 Heating chart (R410A) : ODU(DB/WB) 17/13 57/53 47/43 37/33 27/23 0/-2 -17/-18 °F(°C) (13.89/11.67) (8.33/6.11) (2.78/0.56) (-2.78/-5) (-8.33/-10.56) (-17/-19) (-27/-28) IDU(DB) 55(12.78) 30.3 28.5 25.3 22.8 20.8 18.5 16.5 65(18.33) 32.5 30.0 26.6 25.4 23.3 20.5 19.0 75(23.89) 33.8 31.5 27.8 26.3 24.9...
Page 156 System Pressure Table-R410A Pressure Temperature Pressure Temperature °C °F °C °F 14.5 -51.623 -60.921 2350 23.5 340.75 38.817 101.871 21.75 -43.327 -45.989 2400 39.68 103.424 -36.992 -34.586 2450 24.5 355.25 40.531 104.956 36.25 -31.795 -25.231 2500 362.5 41.368 106.462 43.5 -27.351 -17.232 2550...

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Pioneer QUANTUM INVERTER Series Service & Troubleshooting Manual

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Indoor Unit Disassembly(9K~24K)

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