Table of Contents
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Outdoor Unit Single Zone Ductless System − Sizes 09 to 24
TABLE OF CONTENTS
Safety CONSIDERATIONS
INTRODUCTION
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WIRING DIAGRAM
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DISASSEMBLY INSTRUCTIONS
APPENDIX
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SAFETY CONSIDERATIONS
Installing, starting up, and servicing air−conditioning equipment can be
hazardous due to system pressures, electrical components, and
equipment location (roofs, elevated structures, etc.).
Only trained, qualified installers and service mechanics should install,
start−up, and service this equipment.
Untrained personnel can perform basic maintenance functions such as
cleaning coils. All other operations should be performed by trained
service personnel.
When working on the equipment, observe precautions in the literature
and on tags, stickers, and labels attached to the equipment.
Follow all safety codes. Wear safety glasses and work gloves. Keep
quenching cloth and fire extinguisher nearby when brazing. Use care in
handling, rigging, and setting bulky equipment.
Read this manual thoroughly and follow all warnings or cautions included
in literature and attached to the unit. Consult local building codes and
National Electrical Code (NEC) for special requirements. Recognize safety
information. This is the safety−alert symbol
on the unit and in instructions or manuals, be alert to the potential for
personal injury. Understand these signal words: DANGER, WARNING,
and CAUTION.
DLCERA
SERVICE MANUAL
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. When you see this symbol
Specifications subject to change without notice.
These words are used with the safety−alert symbol. DANGER
identifies the most serious hazards which will result in severe personal
PAGE
injury or death. WARNING signifies hazards which could result in
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personal injury or death. CAUTION is used to identify unsafe practices
which may result in minor personal injury or product and property
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damage. NOTE is used to highlight suggestions which will result in
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enhanced installation, reliability, or operation.
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ELECTRICAL SHOCK HAZARD
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Failure to follow this warning could result in personal
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injury or death.
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Before installing, modifying, or servicing system, main
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electrical disconnect switch must be in the OFF
position. There may be more than 1 disconnect switch.
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Lock out and tag switch with a suitable warning label.
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Failure to follow this caution may result in equipment
damage or improper operation.
Do not bury more than 36 in. (914 mm) of refrigerant pipe
in the ground. If any section of pipe is buried, there must be
a 6 in. (152 mm) vertical rise to the valve connections on
the outdoor units. If more than the recommended length is
buried, refrigerant may migrate to the cooler buried section
during extended periods of system shutdown. This causes
refrigerant slugging and could possibly damage the
Compressor at start−up.
INTRODUCTION
This Service Manual provides the necessary information to service, repair,
and maintain the outdoor units. Section 2 of this manual has an appendix
with data required to perform troubleshooting. Use the Table of Contents
to locate a desired topic.
WARNING
WARNING
EXPLOSION HAZARD
Failure to follow this warning could
result in death, serious personal injury,
and/or property damage.
Never use air or gases containing
oxygen for leak testing or operating
refrigerant compressors. Pressurized
mixtures of air or gases containing
oxygen can lead to an explosion.
CAUTION
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Related Manuals for Midea DLCERAA12AAJ
Summary of Contents for Midea DLCERAA12AAJ
- Page 1 DLCERA SERVICE MANUAL Outdoor Unit Single Zone Ductless System − Sizes 09 to 24 These words are used with the safety−alert symbol. DANGER TABLE OF CONTENTS identifies the most serious hazards which will result in severe personal PAGE injury or death. WARNING signifies hazards which could result in SAFETY CONSIDERATIONS .
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Page 2: Model/Serial Number Nomenclatures
MODEL/SERIAL NUMBER NOMENCLATURES Table 1—Unit Sizes SYSTEM TONS BTUh VOLTAGE - PHASE OUTDOOR MODEL 1.00 12,000 115-1 DLCERAA12AAJ Cooling Only 1.00 12,000 208/230-1 DLCERAA12AAK 1.50 18,000 208/230-1 DLCERAA18AAK 2.00 24,000 208/230-1 DLCERAA24AAK 1.00 12,000 115-1 DLCERAH12AAJ 0.75 9,000 208/230-1 DLCERAH09AAK Heating Pump 1.00... -
Page 3: Specifications
SPECIFICATIONS Table 2—Specifications (Cooling Only) COOLING ONLY Size System Outdoor Model DLCERAA12AAJ DLCERAA12AAK DLCERAA18AAK DLCERAA24AAK Voltage, Phase, Cycle V/Ph/Hz 115-1-60 208/230-1-60 208/230-1-60 208/230-1-60 Electrical MOCP - Fuse Rating Cooling Outdoor DB Operating ° F(° C) 0~ 122 (-17~ 50) 0~ 122 (-17~ 50) - Page 4 SPECIFICATIONS (CONT) Table 3—Specifications (Heat Pump) HEAT PUMP Size System Outdoor Model DLCERAH12AAJ DLCERAH09AAK DLCERAH12AAK DLCERAH18AAK DLCERAH24AAK Voltage, Phase, Cycle V/Ph/Hz 115-1-60 208/230-1-60 208/230-1-60 208/230-1-60 208/230-1-60 Electrical MOCP - Fuse Rating Cooling Outdoor DB Min ° F(° C) 0~ 122 (-17~ 50) 0~ 122 (-17~ 50) 0~ 122 (-17~ 50) 0~ 122 (-17~ 50)
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Page 5: Dimensions
DIMENSIONS Table 4—Dimensions System Size Height (H) in. (mm) Width (W) in. (mm) Depth (D) in. (mm) Weight-Net lbs. (kg) (115V) 21.85(555) 30.31(770) 11.81(300) 57.8(26.2) Cooling (208/230V) 21.85(555) 30.31(770) 11.81(300) 53.8(24.4) Only (208/230V) 21.81(554) 31.50(800) 13.11(333) 70.1(31.8) (208/230V) 27.64(702) 33.27(845) 14.29(363) 88.6(40.2) System Size... - Page 6 DIMENSIONS − OUTDOOR (CONT) 20.24 (514) 13.11 (333) 31.50 (800) 2.76 (7 0) 2.43 (6 1.8) 0.87 (2 2) 2.43 (6 1.6) Unit: inch(mm) Fig. 2 - Size 18K 32808001101 Specifications subject to change without notice.
- Page 7 DIMENSIONS − OUTDOOR (CONT) Unit: inch (mm) Fig. 3 - Size 24K Specifications subject to change without notice. 32808001101...
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Page 8: Clearances
CLEARANCES Air-inlet Air-outlet Fig. 4 - Outdoor Unit Clearance Table 5—Clearances UNIT MINIMUM VALUE in. (mm) 24 (610) 24 (610) 24 (610) 4 (101) 4 (101) NOTE: The outdoor unit must be mounted at least 2in. (50mm) above the maximum anticipated snow depth. Fig. -
Page 9: Electrical Data
ELECTRICAL DATA Table 6—Electrical Data Outdoor Unit Size Volts-PH-Hz (115V) (208/230V) (208/230V) (208/230V) Cooling Only Max – Min* 127-104 253-187 253-187 253-187 Oper. Voltage Power Supply MOCP Compressor Outdoor Fan Motor Rated HP 0.054 0.054 0.065 0.068 Output Outdoor Unit Size Volts-PH-Hz (115V) (208/230V) -
Page 10: Connection Diagrams
CONNECTION DIAGRAM 208/230-1-60 115-1-60 FIELD POWER SUPPLY CONNECTING CABLE FIELD POWER SUPPLY CONNECTING CABLE OUTDOOR TO INDOOR OUTDOOR TO INDOOR L1 L2 L1 L2 Main Power to Indoor Indoor Indoor Power to Main Indoor Unit Power Supply Indoor Unit Signal Indoor Indoor Unit Signal... - Page 11 WIRING DIAGRAMS (CONT) Notes: YELLOW OR BLACK This symbol indicates the element BL UE BLUE OR BLACK is optional, the actual shape shall BROWN prevail. CN 1A INDOOR UNIT POWER SUPPLY OPTIONAL CN 60 REACTOR 4-WAY BLUE 1005AL OPTIONAL CN 17 CRANKCASE MAIN HEATER...
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Page 12: Outdoor Wiring Diagram
WIRING DIAGRAMS (CONTINUED) Applicable to Applicable to OUT DOOR OUT DOOR the units adopting the units adopting AC FAN DC FAN DC motor only AC motor only BLUE BROWN CN414 BLUE CN13 CN12 BLUE OUTDOOR OPTIONAL MAIN CN30 CN6-1 (BLACK) BLUE CN10 COMPRESSOR... - Page 13 WIRING DIAGRAMS (CONTINUED) 16022000B23636 BLACK BLUE According to the real objects L1 L2 CN 3 L1 L2 OPTIONAL OPTIONAL 4-WAY OPTIONAL CRANKCASE OUTDOOR HEATER BLUE CN 29 BLUE MAIN CN 28 BLACK CN 27 BLACK COMPRESSOR CN 17 CN 414 Notes: This symbol indicates the element is optional,...
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Page 14: Refrigeration Cycle Diagrams
REFRIGERATION CYCLE DIAGRAMS INDOOR OUTDOOR CHECK VALVE LIQUID SIDE (Heating Model only) 2−WAY VALVE CAPILIARY TUBE HEAT HEAT EXCHANGE EXCHANGE (EVAPORATOR) (CONDENSER) T1 Room temp. sensor T2 Evaporator temp. sensor GAS SIDE 4−WAY VALVE 3−WAY VALVE ACCUMULATOR COOLING COMPRESSOR HEATING Fig. -
Page 15: Refrigerant Lines
REFRIGERANT LINES General Refrigerant Line Sizing 1. The outdoor units are shipped with a full charge of R410A 4. Both lines must be insulated. Use a minimum of 1/2in. (12.7 refrigerant. All charges, line sizing, and capacities are based on mm) thick insulation. -
Page 16: System Evacuation And Charging
Deep Vacuum Method SYSTEM EVACUATION AND The deep vacuum method requires a vacuum pump capable of pulling a CHARGING vacuum of 500 microns and a vacuum gage capable of accurately measuring this vacuum depth. The deep vacuum method is the most CAUTION positive way of assuring a system is free of air and liquid water (see Fig. -
Page 17: Electronic Functions
ELECTRONIC FUNCTIONS Abbreviation Main Protection T1: Indoor room temperature Three minute delay for compressor restart T2: Coil temperature of evaporator Less than a 1 minute delay for the initial start*up and a 3 minute delay T3: Coil temperature of condenser for subsequent starts. - Page 18 Fig. 18 - Auto Fan Fig. 21 - Compressor Temperature Protection COOLING Mode Compressor Running Rules: When the condenser temperature temperature is higher than the setting value, the compressor stops. When T1*Ts < 28.4 F(*2 C), the compressor stops. Compressor Running Rules When T1*TS >...
- Page 19 Table 8—Auto Mode ΔT=T1-Ts Running mode ΔT＞2℃ Cooling -2≤ΔT≤2℃ Fan-only ΔT<-2℃ Heating Fig. 23 - Auto Fan Action in HEATING Mode The indoor fan runs under auto fan in the relevant mode. The louver operates same as in relevant mode. If the machine switches mode DEFROST Mode between HEATING and COOLING, the compressor stops for 15 The air conditioner enters the DEFROST mode according to the T3...
- Page 20 Refrigerant Leak Detection Open Condition: When the compressor is active, the value of the Coil temperature of evaporator T2 has no change or very little change. With this new technology, the display area displays “EC” when the outdoor unit detects a refrigerant leak. This function is only active in F (8 C) Heating cooling mode.
- Page 21 When the air conditioner enters the information enquiry status, it displays the code value for 25 seconds (see Table 10). Table 10—Information Enquiry ENQUIRY DISPLAY VALUE MEANING REMARK INFORMATION -1F,-1E,-1d,-1c, -25,-24,-23,-22,-21,-20 -1b,-1A 1. The displaying temperature is the actual value. -19—99 -19—99 2.
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Page 22: Troubleshooting
TROUBLESHOOTING Safety Electricity power is kept in capacitors even if the power supply is shut off. NOTE: Remember to discharge the electricity power in capacitor. Electrolytic Capacitors (HIGH VOLTAGE! CAUTION!) Fig. 25 - Electrolytic Capacitors Ω For other models, please connect discharge resistance (approximately 100 40W) or a soldering iron (plug) between the +, −... -
Page 23: Outdoor Unit Diagnostic Guides
OUTDOOR UNIT DIAGNOSTIC GUIDES Table 11—Diagnostic Guides OPERATION LAMP TIMER LAMP DISPLAY LED STATUS ☆ Indoor unit EEPROM parameter error 1 time ☆ Indoor / outdoor units communication error 2 times ☆ 3 times Zero-crossing signal detection error ☆ Indoor fan speed has been out of control 4 times ☆... -
Page 24: Pcb Diagrams
PCB DIAGRAMS connect to PFC Capacitor when is on, 100−130V AC output connect to reactor when is on, 100−130V AC output US− KFR− 35W/BP3N1− (115V+RX62T+41560).D.13.WP2− 1 CN4_1 CN4_2 CN4_3 C N4_4 connect to Ground bridge REACTOR connect to N−line DSA1 (100−130VAC INPUT) connect to L−line (100−130VAC INPUT) - Page 25 PCB DIAGRAMS (CONT) Fig. 29 - Sizes 18k−24k (208−230V) NOTE: After power on, LED3(Green color) and LED2(Red color) will flash if the unit has some problems. Table 12—LED Codes LED3 LED2 Problems IU display (Green) (Red) Standby for normal Operation normally ☆...
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Page 26: Diagnosis And Solution
DIAGNOSIS AND SOLUTION EEPROM Parameter Error Diagnosis and Solution (E0/F4) Error Code E0/F4 Malfunction decision conditions Indoor or outdoor PCB main chip does not receive feedback from the EEPROM chip. Installation mistake Supposed causes PCB faulty Troubleshooting Power off, then restart the unit 2 minutes later. - Page 27 DIAGNOSIS AND SOLUTION (CONT) Indoor / outdoor unit’s communication diagnosis and solution (E1) Error Code Indoor unit does not receive the feedback from outdoor unit during 110 seconds and this condition Malfunction Decision Conditions happens four times continuously. Wiring mistake Supposed Causes Indoor or outdoor PCB faulty Troubleshooting...
- Page 28 DIAGNOSIS AND SOLUTION (CONT) Fig. 32 - Test the DC Voltage Use a multimeter to test the DC voltage between L2 port and S port of the outdoor unit. The red pin of the multimeter connects with the L2 port while the black pin is for the S port.
- Page 29 DIAGNOSIS AND SOLUTION (CONT) Zero crossing detection error diagnosis and solution (E2) Error Code When the PCB does not receive a zero crossing signal feedback for 4 minutes or the zero crossing signal Malfunction decision conditions time interval is abnormal. Connection mistake Supposed causes PCB faulty...
- Page 30 DIAGNOSIS AND SOLUTION (CONT) Fan speed has been out of control diagnosis and solution (E3/F5) Error Code E3/F5 When indoor fan speed remains too low (300RPM) for certain time, the unit stops and the LED displays Malfunction decision conditions the failure. Wiring mistake Fan assembly faulty Supposed causes...
- Page 31 DIAGNOSIS AND SOLUTION (CONT) Index 1 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 voltage value is not in the range shown in Table 13 or Table 14, the PCB has an issue and needs to be replaced.
- Page 32 DIAGNOSIS AND SOLUTION (CONT) Open circuit or short circuit of temperature sensor diagnosis and solution (E4/E5/F1/F2/F3) Error Code E4/E5/F1/F2/F3 Malfunction decision conditions If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED displays the failure. Wiring mistake Supposed causes Sensor faulty PCB faulty...
- Page 33 DIAGNOSIS AND SOLUTION (CONT) Refrigerant Leakage Detection diagnosis and solution (EC) Error Code Define the evaporator coil temp.T2 of the compressor. It starts running in Tcool. At first, 5 minutes after the compressor starts up, if T2 ＜Tcool－35.6 F (Tcool－2 C) does not run for 4 Malfunction decision conditions seconds and this situation occurs 3 times, the display area displays“EC”and the air conditioner will...
- Page 34 DIAGNOSIS AND SOLUTION (CONT) Overload current protection diagnosis and solution (F0) Error Code Malfunction decision conditions An abnormal current rise is detected by checking the specified current detection circuit. Power supply problems System blockage Supposed causes PCB faulty Wiring mistake Compressor malfunction Troubleshooting Stop the unit...
- Page 35 DIAGNOSIS AND SOLUTION (CONT) IPM malfunction or IGBT over−strong current protection diagnosis and solution (P0) Error Code When the voltage signal, that the IPM sends to the compressor drive chip is abnormal, the display LED Malfunction decision conditions displays P0”and the air conditioner turns off. Wiring mistake IPM malfunction Supposed causes...
- Page 36 DIAGNOSIS AND SOLUTION (CONT) Fig. 36 - P−U Fig. 37 - P−V 32808001101 Specifications subject to change without notice.
- Page 37 DIAGNOSIS AND SOLUTION (CONT) Fig. 38 - P−W Fig. 39 - N−U Specifications subject to change without notice. 32808001101...
- Page 38 DIAGNOSIS AND SOLUTION (CONT) Fig. 40 - N−V Fig. 41 - N−W 32808001101 Specifications subject to change without notice.
- Page 39 DIAGNOSIS AND SOLUTION (CONT) Over voltage or too low voltage protection diagnosis and solution (P1) Error Code Malfunction decision conditions An abnormal voltage rise or drop is detected by checking the specified voltage detection circuit. Power supply problems Supposed causes System leakage or block PCB faulty Troubleshooting...
- Page 40 DIAGNOSIS AND SOLUTION (CONT) High temperature protection of compressor top diagnosis and solution (P2) Error Code Malfunction decision conditions If the sampling voltage is not 5V, the LED displays the failure. Power supply problems Supposed causes System leakage or block PCB faulty Troubleshooting Check if the Fastening screws...
- Page 41 DIAGNOSIS AND SOLUTION (CONT) Inverter compressor drive error diagnosis and solution (P4) Error Code An abnormal inverter compressor drive is detected by a special detection circuit, including communication Malfunction decision conditions signal detection, voltage detection, compressor rotation speed signal detection, etc. Wiring mistake IPM malfunction Supposed causes...
- Page 42 DIAGNOSIS AND SOLUTION (CONT) Main Parts Check Temperature Sensor Checking Disconnect the temperature sensor from the PCB, measure the resistance value with a tester. Fig. 43 - Tester Temperature sensors. Room temp.(T1) sensor, Indoor coil temp.(T2) sensor, Outdoor coil temp.(T3) sensor, Outdoor ambient temp.(T4) sensor, Compressor discharge temp.(T5) sensor.
- Page 43 DIAGNOSIS AND SOLUTION (CONT) Compressor Checking Measure the resistance value of each winding by using the tester. Fig. 44 - Tester Table 15—Compressor Checking Position Resistance Value ASN98D22UFZ ASM135D23UFZ ATF235D22UMT ATF250D22UMT Blue - Red 1.57Ω 1.75 Ω 0.75 Ω Blue - Black 0.75 Ω...
- Page 44 DIAGNOSIS AND SOLUTION (CONT) IPM Continuity Check Turn off the power, let the large capacity electrolytic capacitors discharge completely, and dismount the IPM. Use a digital tester to measure the resistance between P and UVWN; UVW and N. Table 16—IPM Continuity Check Digital Tester Normal Resistance Value Digital Tester...
- Page 45 Pressure on Service Port Table 18—Cooling Chart ODT/IDT °F °C (23.89) (29.44) (35) (40.56) (46.11) 70/59 10.1 75/63 10.7 80/67 11.2 ODT/IDT °F °C (23.89) (29.44) (35) (40.56) (46.11) 70/59 75/63 80/67 ODT/IDT °F °C (23.89) (29.44) (35) (40.56) (46.11) 70/59 0.82 0.78...
- Page 46 Pressure on Service Port (Cont) Table 19—Heating Chart 57/53 47/43 37/33 27/23 17/13 ODT/IDT °F °C (13.89/11.67) (8.33/6.11) (2.78/0.56) (-2.78/-5) (-8.33/-10.56) 30.3 28.5 25.3 22.8 20.8 32.5 30.0 26.6 25.4 23.3 33.8 31.5 27.8 26.3 24.9 57/53 47/43 37/33 27/23 17/13 ODT/IDT °F...
- Page 47 DISASSEMBLY INSTRUCTIONS SIZES 12K (115V) Panel plate How to remove the panel plate. Top panel screws (3), 1 screws is under the big handle 1. Stop the air conditioner and turn “OFF” the Big handle power breaker. (3 screws) 2. Remove the big handle first, and then remove the top cover (3 screws).
- Page 48 DISASSEMBLY INSTRUCTIONS SIZES 12K (115V) (CONT) How to remove the fan assembly assembly. 1) Remove the nut securing the fan, and remove the fan. 2) After removing the top cover, release the hooks and open the electronic control box cover. Disconnect the fan motor connector from the electronic control...
- Page 49 DISASSEMBLY INSTRUCTIONS SIZES 12K (115V) (CONT) 4) Remove the fan motor screws (4) then remove the motor. Specifications subject to change without notice. 32808001101...
- Page 50 DISASSEMBLY INSTRUCTIONS SIZES 12K (115V) (CONT) Electrical How to remove the parts electrical parts. 1) After you complete the steps in item 1 and 2, remove the compressor connector. 2) Pull out the two blue wires connected to the four way valve. 3) Pull out connectors of the condenser coil temp.
- Page 51 DISASSEMBLY INSTRUCTIONS SIZES 12K (115V) (CONT) 4) Disconnect the electronic expansion valve wire from the control board. 5) Remove the ground wires. 6) Remove the wires (1,2,3). 7) Remove the electronic control box. Specifications subject to change without notice. 32808001101...
- Page 52 DISASSEMBLY INSTRUCTIONS SIZES 12K (115V) (CONT) Four-way How to remove the valve four-way valve. The picture of four-way valve may be different from your actual valve. 1) Perform the work of sections 1 and 3. 2) Recover refrigerant from the refrigerant circuit.
- Page 53 DISASSEMBLY INSTRUCTIONS SIZES 9−12K (208−230V) Part name Procedures Remarks Panel plate How to remove the panel plate. Top panel screws (3 screws, 1 screw is under the big handle) 1) Stop the air conditioner and turn “OFF” the power breaker. Handler screws (3) Front panel screws (6) 2) Remove the big handle...
- Page 54 DISASSEMBLY INSTRUCTIONS SIZES 9−12K (208−230V) (CONT) How to remove the fan assembly assembly. 1) After removing the panel plate using section 1, remove the hex nut securing the fan then remove the fan. 2) Release the hooks and open the Compressor T3, T4, T5 sensor electronic control box...
- Page 55 DISASSEMBLY INSTRUCTIONS SIZES 9−12K (208−230V) (CONT) 3) Disconnect the fan motor connector and from the electronic control board. 4) Remove the fan motor screws (4). Then remove the fan motor. Electrical How to remove the parts electrical parts. 1) After completing the work in sections 1 and 2, remove the compressor...
- Page 56 DISASSEMBLY INSTRUCTIONS SIZES 9−12K (208−230V) (CONT) 3) Pull out connectors of the condenser coil temp. sensor (T3),outdoor ambient temp. sensor (T4) and discharge temp. sensor (T5). 4) Disconnect the electronic expansion valve wire. 5) Remove the grounding screw. 6) Remove the wires (1, 2, 3).
- Page 57 DISASSEMBLY INSTRUCTIONS SIZES 9−12K (208−230V) (CONT) Four-way How to remove the valve four-way valve. The picture of four-way valve may differ from your actual valve. 1) Complete the steps in sections 1, 3. 2) Recover refrigerant from the refrigerant circuit. 3) Remove the coil screw then remove the coil.
- Page 58 DISASSEMBLY INSTRUCTIONS SIZES 18K (208−230V) Part name Procedures Remarks Panel plate How to remove the panel plate. 1) Stop the air conditioner and turn Top panel screws (3) the power breaker. Big handle screws (3) Front panel screws (9) 2) Remove the top panel screws (3).
- Page 59 DISASSEMBLY INSTRUCTIONS SIZES 18K (208−230V) (CONT) How to remove the fan assembly assembly. 1) After removing the panel plate using section 1, remove the hex nut securing the fan then remove the fan. 2) After removing the top cover, release the hooks then open the electronic control box cover.
- Page 60 DISASSEMBLY INSTRUCTIONS SIZES 18K (208−230V) (CONT) Disconnect the connector for fan motor from the electronic control board. Remove the fan motor screws. Then remove the fan motor. Electrical How to remove the parts electrical parts. 1) Complete the work of items 1 and 2, then remove the compressor and...
- Page 61 DISASSEMBLY INSTRUCTIONS SIZES 18K (208−230V) (CONT) 2) Pull out the two blue wires connected to the four way valve. 3) Remove the connectors of the condenser coil temp. sensor (T3),outdoor ambient temp. sensor (T4) and discharge temp. sensor (T5). 4) Disconnect the electronic expansion valve wire.
- Page 62 DISASSEMBLY INSTRUCTIONS SIZES 18K (208−230V) (CONT) 5) Remove the electric heaters. 6) Remove the grounding screw. 7) Remove the wires (1, 2, 3 or L1, L2, S). Then remove the electronic control box. 32808001101 Specifications subject to change without notice.
- Page 63 DISASSEMBLY INSTRUCTIONS SIZES 18K (208−230V) (CONT) Four-way How to remove the valve four-way valve. The picture of four-way valve may differ from your 1) Complete the steps in actual valve. sections 1, 3. 2) Recover refrigerant from the refrigerant circuit. 3) Remove the coil screw then remove the coil.
- Page 64 DISASSEMBLY INSTRUCTIONS SIZES 24K (208−230V) Part name Procedures Remarks Panel plate How to remove the panel Big handle screws (4) plate. 1) Stop the air Top panel screws (3), 1 screw is under the big handle) conditioner and turn “OFF” the power breaker.
- Page 65 DISASSEMBLY INSTRUCTIONS SIZES 24K (208−230V) (CONT) How to remove the fan assembly assembly. Electronic control box 1) Remove the panel plate using the steps in section 1. 2) Remove the nut securing the fan, then remove the fan. Compressor 3) Release the hooks and remove the screws.
- Page 66 DISASSEMBLY INSTRUCTIONS SIZES 24K (208−230V) (CONT) Compressor Pressure switch T3, T4, T5, sensor wire 4) Disconnect the fan motor connector from the electronic control board. 5) Remove the fan motor screws (4) of the fan Electronic expansion Motor wire 4 way valve motor, then remove the motor.
- Page 67 DISASSEMBLY INSTRUCTIONS SIZES 24K (208−230V) (CONT) Electrical How to remove the parts electrical parts. After completing the work in sections 1 and 2, remove the compressor connector. 2) Pull out the two blue wires connected with the four way valve. Pull out connectors of the condenser coil temp.
- Page 68 DISASSEMBLY INSTRUCTIONS SIZES 24K (208−230V) (CONT) Disconnect the pressure switch connector. Disconnect the electronic expansion valve wire from the control board. Remove the ground wires. Remove the wires (1, 2, 3 or L1, L2, S). Then remove the electronic control box. 32808001101 Specifications subject to change without notice.
- Page 69 DISASSEMBLY INSTRUCTIONS SIZES 24K (208−230V) (CONT) Four-way How to remove the valve four-way valve. The picture of four-way valve may differ from your 1) Complete the steps in actual valve. sections 1, 3. 2) Recover the refrigerant from the refrigerant circuit.
- Page 70 APPENDIX 1 ° Table 20—Temperature Sensor Resistance Value Table for T1, T2, T3, 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...
- Page 71 APPENDIX 2 ° Table 21—Temperature Sensor Resistance Value Table for T5 ( C−−K) °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm 542.7 68.66 13.59 3.702 511.9 65.62 13.11 3.595 62.73 12.65 3.492 455.9 59.98 12.21...
- Page 72 APPENDIX 3 Δ ° Δ ° Table 22— F)=9 C)/5 °C °F °C °F °C °F °C °F °C °F 69.8 123.8 179.6 235.4 24.8 71.6 125.6 181.4 237.2 26.6 73.4 127.4 183.2 28.4 75.2 129.2 240.8 30.2 186.8 242.6 25.5 77.9 132.8...