Page 1 MULTI-ZONE MINI-SPLIT (DUAL, TRIPLE, QUAD, & FIVE PORT) SERVICE MANUAL For the following models: Indoor Unit Outdoor Unit Wall Mounted Cassette SHE9H4ZIGB SMZCA12H4ZIGX Dual SHE12HZIGB SMZCA18H4ZIGX SMZ18H422ZOGB SHE18HZIGB SMZCA24H4ZIGX SHE24HZIGB SMZCA12H4ZIGC Triple SMZCA18H4ZIGC SMZ24H421ZOGB SMZCA24H4ZIGC Floor/Ceiling SMZFC9H4ZIGX Quad SMZFC12H4ZIGX SMZ30H421ZOGB...
Page 2: Table Of Contents
Table of Contents 1. Precaution ..................................6 1.1 Safety Precaution ................................ 6 1.2 Warning ..................................6 1.3 Caution ..................................7 1.4 Operational ................................. 7 2. Model Names and Definitions ............................8 2.1 Model Names and Definition ............................8 2.2 Types of Indoor Units ..............................1 3.
Page 3 6.2.2 Triple Port ................................18 6.2.3 Quad / Five Port ..............................19 7. System Configuration ..............................21 7.1 System Structure ............................... 21 7.2 Configuration Options ............................... 21 7.2.1 Dual Port Options ............................... 21 7.2.2 Quad Port Options.............................. 22 7.2.3 Quad Port Options.............................. 22 7.2.4 Five Port Options ..............................
Page 4 9.1.3 “FAN” Mode ............................... 35 9.1.4 “HEAT” Mode ..............................36 9.2 Protection Features ..............................37 9.2.1 Mode Conflict (“E7”) ........................... 37 9.2.2 Overload Protection (“E8”) ..........................37 9.2.3 Compressor Overload Protection (“H3”) ......................37 9.2.4 Communication Malfunction (“E6”) ........................37 9.2.5 Intelligent Power Module (IPM) Protection (“H5”) ....................
Page 5 11.12 H5: IPM Protection ..............................56 11.13 H6: Indoor Fan Motor Failure..........................57 11.14 H7: Compressor Desynchronizing ......................... 58 11.15 HC: PFC Protection ..............................59 11.16 Lc: Startup Failure ..............................60 11.17 PU: Capacitor Charging Circuit Error ........................61 11.18 U8: Indoor Fan Motor Zero-Cross Detecting Error....................62 11.19 Maintenance Method for Normal Malfunction ....................
Page 6 13.2.2 Triple Port ............................... 128 13.2.3 Quad Port ............................... 129 13.2.4 Five Port ................................. 130 14. Appendix ..................................131 14.1 Appendix I: Resistance of Ambient Temperature Sensor (15K) for Indoor/Outdoor Units (F1,F3) ...... 131 14.2 Appendix II: Resistance of Tube Temperature Sensor (20K) for Indoor/Outdoor Units (F2,F4) ......132 14.3 Appendix III: Resistance of Exhaust Temperature Sensor (50K) for Outdoor Units (F5) ........
Page 7: Precaution
1. Precaution  Installation MUST conform with local building codes or, in the absence of local codes, with the National Electrical Code NFPA70/ANSI C1-1993 or current edition and Canadian Electrical Code Part1 CSA C.22.1.  The information contained in the manual is intended for use by a qualified service technician familiar with safety procedures and equipped with the proper tools and test instruments.
Page 8: Caution
 When the product is soaked, contact an authorized service center.  Be careful to prevent water from entering the product.  Ventilate the product from time to time when operating with a stove, etc.  Turn the main power off when cleaning or maintaining the product. ...
Page 9: Model Names And Definitions
H: Heat pump X – Internal Code E – Type of Refrigerant 4: R410a F – Rated Voltage Z: 230V Model Type of Unit (I/O) Type of Unit Capacity (BTU) SHE9H4ZIGB 9,000 SHE12H4ZIGB 12,000 Wall Mounted SHE18H4ZIGB 18,000 SHE24H4ZIGB 21,400 SMZC9H4ZIGX...
Page 10: Types Of Indoor Units
2.2 Types of Indoor Units Indoor Unit Type Catalog Number Indoor Unit SHE9H4ZIGB SHE12H4ZIGB Wall-mounted SHE18H4ZIGB SHE24H4ZIGB SMZC9H4ZIGX Console SMZC12H4ZIGX SMZC18H4ZIGX SMZCA12H4ZIGX SMZCA18H4ZIGX SMZCA24H4ZIGX Cassette SMZCA12H4ZIGC SMZCA18H4ZIGC SMZCA24H4ZIGC SMZFC9H4ZIGX SMZFC12H4ZIGX Floor / Ceiling SMZFC18H4ZIGX SMZFC24H4ZIGX SMZD9H4ZIGX SMZD12H4ZIGX Ducted SMZD18H4ZIGX SMZD21H4ZIGX...
Page 11: Dimensions
3. Dimensions 3.1 Indoor Unit 3.1.1 Wall Mounted Model Width Height Depth SHE9H4ZIGB / SHE12H4ZIGB 33.3” 10.8” 7.1” SHE18H4ZIGB 37” 11.7” 7.9” SHE24H4ZIGB 39.6” 12.4” 8.6” 3.1.2 Console Model Width Height Depth SMZC9H4ZIGX SMZC12H4ZIGX 27.6” 23.6” 8.5” SMZC18H4ZIGX 27 6 . "...
Page 12: Cassette
3.1.3 Cassette Model Width Height Depth SMZCA12H4ZIGX Outline Outline Outline SMZCA18H4ZIGX SMZCA24H4ZIGX Outline Outline Outline SMZCA12H4ZIGX & SMZCA18H4ZIGX 25.6" 22.44" 15.75" 22.44" 23.8" 25.6" SMZCA24H4ZIGX Refrigerant pipe Hoisting screws (4 pcs) 26.8" ( Gaps between hoisting screw rods) 33.1" ( Indoor unit) 35"...
Page 13: Floor/Ceiling
3.1.4 Floor/Ceiling Model SMZFC9H4ZIGX SMZFC12H4ZIGX 48.03” 8.86” 27.56” 45.59” 11.02” SMZFC18H4ZIGX SMZFC24H4ZIGX 3.1.4 Ducted Model SMZD9H4ZIGX 29.21" 19.33” 26.06” 24.41” 27.56” 24.21” 30.79” 6.14” 7.87” 25” SMZD12H4ZIGX SMZD18H4ZIGX 37.09” 19.33” 33.94” 32.28 35.43” 24.21” 38.66” 6.14” 7.87” 25” SMZD21H4ZIGX 44.96” 19.33”...
Page 14: Outdoor Unit
3.2 Outdoor Unit 3.2.1 Dual Port SMZ18H422ZOGB...
Page 15: Triple / Quad Port
3.2.2 Triple / Quad Port SMZ24H421ZOGB / SMZ30H421ZOGB...
Page 16: Five Port
3.2.3 Five Port SMZ42H421ZOGB...
Page 17: Refrigeration System Diagram
4. Refrigeration System Diagram Model Ports Capacity (BTU) SMZ18H422ZOGB Dual 18,000 SMZ24H421ZOGB Triple 24,000 A1: Unit A electronic expansion valve A2: Unit A gas pipe temperature sensor A3: Unit A liquid pipe temperature sensor B1: Unit B electronic expansion valve B2: Unit B gas pipe temperature sensor B3: Unit B liquid pipe temperature sensor C1: Unit C electronic expansion valve...
Page 18 Model Ports Capacity (BTU) SMZ30H421ZOGB Quad 30,000 SMZ42H421ZOGB Five 42,000...
Page 19: Key Components
5. Key Components 5.1 Compressor Working Range: 36~110Hz (SMZ18H422ZOGB) 30~100Hz (SMZ24H421ZOGB, SMZ30H421ZOGB) 15~110Hz (SMZ42H421ZOGB) Using the set temperature, unit capacity, indoor and outdoor temperature, the outdoor unit will determine the required load and adjust the working frequency of the compressor. 5.2 Electronic Expansion Valve Opening Angle: 90~480Hz...
Page 20: Wiring Diagram
NOTE: The wiring diagrams shown are subject to change without notice. Please refer to the one supplied with the unit for the most accurate information. 6.1 Indoor Units 6.1.1 Wall Mounted Model Capacity (BTU) SHE9H4ZIGB 9,000 SHE12H4ZIGB 12,000 θ θ...
Page 21: Console
Model Capacity (BTU) SHE24H4ZIGB 21,400 AP2: MAIN BOARD STEPPING MOTOR MOTOR INDOOR UNIT 6.1.2 Console Model Capacity (BTU) SMZC9H4ZIGX 9,000 SMZC12H4ZIGX 12,000 SMZC18H4ZIGX 18,000...
Page 22: Cassette
6.1.3 Cassette Model Capacity (BTU) SMZCA12HZIGX 12,000 SMZCA18HZIGX 14,400 Model Capacity (BTU) SMZCA24HZIGX 22,800 Evaporator Shell...
Page 23 Model Capacity (BTU) SMZCA12HZIGC 12,000 SMZCA18HZIGC 14,400 WIRED ROOM TEMP. TUBE TEMP. WATER PUMP LIQUID LEVEL CONTROLLER CONTACT INDOOR UNIT SENSOR SENSOR MOTOR SWITCH MAGNETIC TERMINAL RING BLOCK WH(BU) N(1) ROOM TUBE PUMP WATER-DTCT COM-MANUAL DOOR-C COM-OUT AP1：PRINTED CIRCUIT BOARD RD(BN) AC-L JUMP...
Page 24: Floor/Ceiling
6.1.4 Floor/Ceiling Model Capacity (BTU) SMZFC9H4ZIGX 8,500 SMZFC12H4ZIGX 11,900 SMZFC18H4ZIGX 17,000 SMZFC24H4ZIGX 22,800 Evaporator Bracket...
Page 25: Ducted
6.1.5 Ducted Model Capacity (BTU) SMZD9H4ZIGX 8,500 SMZD12H4ZIGX 11,900 SMZD18H4ZIGX 15,300 SMZD21H4ZIGX 20,400 SMZD24H4ZIGX 23,800...
Page 26: Outdoor Units
6.2 Outdoor Units 6.2.1 Dual Port SMZ18H422ZOGB TERMINAL POWER BLOCK EXHAUST AC L1 TEMP SENSOR AC L2 AC L - RT 2 OUTROOM T-SENSOR 5YEGN E PE TEMP SENSOR 8YEGN OUTTUBE ELECTRONIC TEMP SENSOR TERMINAL EXPANSION BLOCK VALVE B WH BU 4WAY 4-WAY VALVE ELECTRONIC...
Page 27: Triple Port
6.2.2 Triple Port SMZ24H422ZOGB TERMINAL BLOCK 21BN EXHAUST AC L - AC L1 AC L2 TEMP SENSOR 22BU OUTROOM 10BU 11BN T SENSOR 4YEGN Main Board TEMP SENSOR 12YEGN LINE POWER E PE OUTTUBE TEMP SENSOR LOAD BOTTOM HEAT B - WH BU 20YE BAND HEATER...
Page 28: Quad / Five Port
6.2.3 Quad / Five Port SMZ30H421ZOGB / SMZ42H421ZOGB...
Page 29 Wiring Diagram for SMZ30H421ZOGB OUTLET PIPE YEGN RT3A D - TEMP SENSOR AC L - POWER INLET PIPE RT2A D - TEMP SENSOR OUTDOOR RT1B C - TUBE SENSOR OUTDOOR P1 1 - RT1D TEMP SENSOR GND1 1 - DISCHARGE RT1A TEMP SENSOR INDOOR...
Page 30: System Configuration
7. System Configuration 7.1 System Structure For this multi-zone air conditioning system, the outdoor unit is able to drive the indoor units which can be different types as shown below. The console indoor unit can be controlled only by the remote control. The other indoor units can be controlled by either the remote control or the wall control.
Page 31: Quad Port Options
7.2.2 Quad Port Options SMZ24H421ZOGB NOTE: Do not mismatch or connect to an outdoor unit other than the designed matched system. This system must be used with a minimum of two (2) indoor units (evaporators). Two (2) Indoor Units Three (3) Indoor Units 9K + 9K 9K + 12K 9K + 9K + 9K...
Page 32: Five Port Options
7.2.4 Five Port Options SMZ42H421ZOGX NOTE: Do not mismatch or connect to an outdoor unit other than the designed matched system. This system must be used with a minimum of two (2) indoor units (evaporators). Two (2) Indoor Units Three (3) Indoor Units Four (4) Indoor Units Five (5) Indoor Units 9K + 9K + 9K...
Page 33: Installation
8. Installation 8.1 Placing the Indoor Unit GENERAL WARNINGS!  Ensure the proper clearance and mounting requirements are met as shown.  Ensure airflow from the inlet and outlet area of the indoor unit is not obstructed.  Make sure that there is enough space for care and maintenance. ...
Page 34: Console
8.1.2 Console 4.9' or more INSTALLATION PAPER PLANK 4.9' or more 4.9' or more 4.9' 6" or more from the floor 8.1.3 Cassette Wall Surface Surface Wall Wall Surface Surface 4. 9 f t 4. 9 f t Wall Surface...
Page 35: Floor/Ceiling
8.1.4 Floor/Ceiling PO W ER RU N T I M ER > 2 ft. > 2 ft > . 3 3 ft > 1 ft > 5 ft > > 2 ft. 2 ft 8.1.5 Ducted...
Page 36: Placing The Outdoor Unit
8.2 Placing the Outdoor Unit GENERAL WARNINGS!  Ensure the proper clearance and mounting requirements are met as shown.  Ensure airflow from the inlet and outlet area of the outdoor unit is not obstructed.  Make sure that there is enough space for care and maintenance. ...
Page 37: Maximum Line Length And Height
8.3 Maximum Line Length and Height For best results, mount the outdoor unit as close as possible to the indoor units. Check the maximum line length specifications before mounting. The maximum line length must not be exceeded! Dual/Triple Port Outdoor Units (18K, 24K) Description Dual Port Outdoor Unit Triple Port Outdoor Unit...
Page 38: Tubing Connection Size
8.4 Tubing Connection Size NOTE: When the indoor line set requires a different size from the outdoor connection, please follow the line set size of indoor unit. An adaptor is required to connect the line set to outdoor unit. 8.4.1 Indoor Unit 1/4"...
Page 39: Refrigerant Tubing
8.5 Refrigerant Tubing GENERAL WARNINGS!  The outdoor unit is supplied with a sufficient refrigerant charge of R410a for the maximum design length (no extra refrigerant required. Beyond this length, additional refrigerant is required and must be weighed in (see specifications). ...
Page 40: Electrical Connection
8.6 Electrical Connection GENERAL WARNINGS!  Electrical wiring and connections should be made by a qualified electrician in accordance with the National and Local electrical codes and regulations.  The system must be properly grounded.  Voltage should not vary beyond ±10% of the rated voltage. ...
Page 41 Typical Wiring Connections WARNINGS!  Improper wiring between the indoor and outdoor units can cause serious damage to the system and risk to personal injury or fire. Use caution when connecting the wiring to ensure that the wires are connected properly. ...
Page 42: Evacuating The System
8.7 Evacuating the System After connecting the indoor and outdoor units, evacuate the air from the line set and the indoor unit by following the procedures below. Leak Testing Indoor units are nitrogen pre-charged, however they should be pressure tested before installation. Follow the steps below to test for leaks.
Page 43: Start-Up Testing
8.8 Start-Up Testing 8.8.1 Preparation NOTE: A wall control (MSWCH; 243-7002) is optional. For operation and installation details, please refer to manual 950-0210 and 950-0220 respectively. 1. Double check that all wiring has been properly connected. 2. Check that tubing has been properly connected and unsure the suction and liquid side service valves are fully open.
Page 44: Functions And Protection Features
9. Functions and Protection Features 9.1 Functions 9.1.1 “COOL” Mode Temperature range: 61~86°F 4 way valve position: Closed (Off) On operation: • The compressor will only start running when any of the indoor units call for cooling and the compressor delay interval has passed. •...
Page 45: Heat" Mode
9.1.4 “HEAT” Mode Temperature range: 61~86°F 4 way valve position: Open (On) On Operation: • The compressor will only start running when any of the indoor units call for heating and the compressor delay interval has passed. • When the compressor is operating, the electronic expansion valve and outdoor fan will also turn on.
Page 46: Protection Features
9.2 Protection Features 9.2.1 Mode Conflict (“E7”) If two or more indoor units are operating in different modes, an indoor unit may show this error code if there is a mode conflict. Below are the priority levels and mode conflict for the different modes of operation.
Page 47: Compressor Phase Protection ("Ld")
9.2.7 Compressor Phase Protection (“Ld”) If one of the three phases of the compressor is open, the system will enter the compressor phase protection mode with “Ld” displaying on the indoor units. The malfunction will be cleared after 1 min. The unit will restart and then determine if any of the phases are still open. If this occurs six times in a row before the compressor stays on for longer than seven (7) minutes, then the system will not turn on until power has been disconnected to the system.
Page 48: Error Codes
10. Error codes 10.1 Error Codes on Indoor unit panel Malfunction Name Display Running LED Cooling LED Heating LED Short/Open Circuit of the Liquid Valve Temp. Sensor 19 Flashes Short/Open Circuit of the Suction Valve Temp. Sensor 22 Flashes Jumper Failure 15 Flashes Trial Operation for communication / Expansion Valve Flashing...
Page 49: Flash Codes On The Pc Board Of Outdoor Unit
10.2 Flash codes on the PC board of outdoor unit 10.2.1 Dual/Triple Ports Remove the top cover of the outdoor unit to approach the control box. The wiring diagram and error code label are placed on the cover of the control box. There is not a flash located on the outdoor main boards.
Page 50: Quad / Five Ports
10.2.2 Quad / Five Ports There are three flashes for error codes which are located on the outdoor main boards When several malfunctions occur at the same time, they will be displayed in circulation and every malfunction is displayed for 5 seconds. Remove the top cover of the outdoor unit to gain access to the main board in the control box.
Page 51: Error Code Label On Smz30H421Zogb (Quad Port) And Smz42H421Zogb (Five Port)
10.2.2.2 Error Code Label on SMZ30H421ZOGB (Quad Port) and SMZ42H421ZOGB (Five Port) Outdoor unit control board LED status Indoor unit Name of malfunction display Yellow Green flash once Compressor runs Defrost flash twice Anti-freezing protection flash 3 times flash 4 times IPM protection flash 5 times AC over-current protection...
Page 52: Troubleshooting
11. Troubleshooting NOTE: All pictures used in this section are for reference only. Actual products may be different. WARNING! Electricity is still kept in the capacitors even when the power supply is shut off or disconnected. Do not forget to discharge the electricity in the capacitors before troubleshooting. Electrolytic Capacitors (CAUTION! HIGH VOLTAGE!) For other models, please connect the discharge resistance (approximately 100Ω...
Page 53 THIS PAGE INTENTIONALLY LEFT BLANK...
Page 54: C5: Jumper Failure
11.1 C5: Jumper Failure...
Page 55: E1: High Pressure Protection
11.2 E1: High Pressure Protection Additional Possible Causes  Outdoor board and pressure switch is not connected well  Too much refrigerant in the system  Outdoor ambient temperature is too high (i.e. >127 °F)  Expansion valve or 4-way valve failed...
Page 56: E2: Anti-Freezing Protection
11.3 E2: Anti-Freezing Protection Possible Causes  Check the air flow. Make sure the inlet and outlet of both indoor and outdoor unit is not blocked.  Check the air filters and make sure they are clean.  Check the indoor tube sensor F2 by referring the value from “Appendix II” on page 130.
Page 57: E3: Low Pressure Protection
11.4 E3: Low Pressure Protection...
Page 58: E4: Exhaust Protection
11.5 E4: Exhaust Protection 11.6 E5: Over-Current Protection...
Page 59: E6: Communication Malfunction
11.7 E6: Communication Malfunction If “E6” only shows up on some indoor units.
Page 60 If “E6” shows up on all indoor units.
Page 61: E8: Overload Protection
11.8 E8: Overload Protection Main Checking points:  Outdoor ambient temperature is too high (i.e. >127 °F);  If the indoor fan and outdoor fan are running normally;  If the indoor and outdoor radiation environment is good. The system overload protection E8 is mainly caused by high pressure or overcurrent issue. Please refer to the flow chat for E1 (on page 45) and E5 (on page 48).
Page 62: F1/F2/F3/F4/F5: Temperature Sensor Failure
11.10 F1/F2/F3/F4/F5: Temperature Sensor Failure  Check the resistance value of corresponding sensor.  Check the position of corresponding sensor; make sure the connection is good.  Check the wiring.  If above are OK, the PC board may have to be replaced. See Appendix I, II, or III on page 129-130 for the resistance of the sensors.
Page 63: F2/F4: Tube Sensor For Indoor And Outdoor
11.10.2 F2/F4: Tube Sensor for Indoor and Outdoor 11.10.3 F5: Exhaust Sensor Failure...
Page 64: H3: Compressor Overload Protection
11.11 H3: Compressor Overload Protection Main Checking points:  If the electronic expansion valve is connected well or it is broken;  If there is refrigerant leakage;  If the overload protector is broken. Note: The resistance of all terminals on the electronic expansion valve should be within 100 Ω.
Page 65: H5: Ipm Protection
11.12 H5: IPM Protection Main checking points:  The input voltage of the unit is not normal.  The connection wire for the compress is not connect well or loose.  The resistance of the compressor is not normal.  The unit is overloaded.
Page 66: H6: Indoor Fan Motor Failure
11.13 H6: Indoor Fan Motor Failure For Dual/Quad port units only (SMZ18H422ZOGB & SMZ24H421ZOGB)
Page 67: H7: Compressor Desynchronizing
11.14 H7: Compressor Desynchronizing Main checking points:  If the pressure of the system is too high;  If the electronic expansion valve is working normally or it is broken;  If the radiation of the unit is not good.
Page 68: Hc: Pfc Protection
11.15 HC: PFC Protection Main checking points:  If the wiring of the induction is connected well and if the induction is broken;  If the outdoor mainboard is broken.
Page 69: Lc: Startup Failure
11.16 Lc: Startup Failure Main checking points:  If the connection wire of the compressor is connected properly;  If the stop duration of the compressor is sufficient;  If the compressor is broken;  If the refrigerant charging amount is too much.
Page 70: Pu: Capacitor Charging Circuit Error
11.17 PU: Capacitor Charging Circuit Error...
Page 71: U8: Indoor Fan Motor Zero-Cross Detecting Error
11.18 U8: Indoor Fan Motor Zero-Cross Detecting Error For Dual/Triple port units only (SMZ18H422ZOGB /SMZ24H421ZOGB)
Page 72: Maintenance Method For Normal Malfunction
11.19 Maintenance Method for Normal Malfunction 11.19.1 Air Conditioner does not start up. Possible Causes Discriminating Method (Air Conditioner Status) Troubleshooting Confirm whether it’s due to power failure. If yes, No power supply, or poor After energization, operation indicator isn’t wait for power recovery.
Page 73: Outdoor Fan Motor Does Not Operate
11.19.4 Outdoor Fan Motor does not operate Possible Causes Discriminating Method (Air Conditioner Status) Troubleshooting Connect wires according to the wiring diagram, Check the wiring status according to wiring Wrong wiring, or poor connection make sure all wiring terminals are connected diagram firmly.
Page 74: Disassembly Procedure
12. Disassembly Procedure CAUTION! Be sure to wait for a minimum of 10 minutes after turning off power before disassembly. 12.1 Outdoor Units 12.1.1 Dual Port (SMZ18H422ZOGX) Step 1: Remove top cover and handle Before disassembly. Twist off the screws used for fixing the handle, pull the handle upward to remove it.
Page 75 Step 2: Remove top cover Twist off the screws used for fixing the top cover, pull the top cover upward to remove it. Step 3: Remove front grill and front panel Remove the screws connecting the front grill and the front panel. Remove the front grill.
Page 76 Step 4: Remove right side plate Remove the screws connecting the right side plate with the chassis, the valve support, and the electric box. Then remove the right side plate assembly. Step 5: Remove guard grille and left side plate Remove the screws fixing guard grille and left side plate to remove guard grille.
Page 77 Step 6: Remove condenser support Remove the screws fixing support and chassis, to remove the condenser support. Step 7: Remove axial flow fan Remove the nuts fixing the blade with spanner and then remove the axial flow fan. Step 8: Remove motor and motor support assembly Remove the four (4) tapping screws fixing the motor.
Page 78 Step 9: Remove electric box assembly Remove the screws fixing the electric box subassembly; loosen the wire bundle, pull out the wiring terminals and then pull the electric box upwards to remove it. Step 10: Remove PFC electrical inductance Remove the screws connecting PFC electrical inductance and isolation sheet to remove the PFC electrical inductance.
Page 79 Step 11: Remove 4-way valve Recover all the refrigerant from the system. Unsolder the pipelines connecting the compressor and condenser assembly. Then remove the 4-way valve assembly. Step 12: Remove suction pipe assembly Unsolder the brazed joint at the suction pipe assembly as well as the brazed joint for connection pipe for compressor and liquid receiver, and then pull it...
Page 80 Step 13: Remove liquid receiver Remove screws fixing the liquid receiver to the isolation sheet, and lift to remove the liquid receiver. Step 14: Remove the isolation sheet assembly Remove screws fixing isolation sheet and condenser side plate. Then remove the isolation sheet assembly.
Page 81 Step 15: Remove compressor Twist off the three foot-nuts on the compressor with spanner, as well as the foot cushions, and then remove the compressor. Step 16: Remove valve support assembly Remove the screws fixing valve support assembly to the chassis, and then pull it upwards to remove it.
Page 82 Step 16: Remove electronic expansion valve assembly Unsolder the brazed joint between the electronic expansion valve and the connection pipe, and then remove the expansion valve. Meanwhile, rotate out the electronic coil and then pull it upwards to remove it. Note: Wrap the valve body with wet cloth completely while unsoldering to avoid damaging the valve caused by...
Page 83: Triple Port (Smz24H421Zogb)
12.1.2 Triple Port (SMZ24H421ZOGB) Step 1: Remove the big handle and top panel Twist off the screws fixing the big handle, pill it upward to remove it. Remove the three (3) screws fixing the top panel with the front panel and the right side plate, and then remove the top panel.
Page 84 Step 2: Remove grille, front side plate and panel Remove the two (2) screws fixing grille and panel to remove the grill on the panel. Remove the screw fixing the front side plate and panel to remove it Remove the five (5) screws fixing panel, chassis, and motor support to remove the panel.
Page 85 Step 3: Remove right side plate and left side plate Remove the screws fixing the right side plate, chassis, valve support and the electric box, and then remove the right side plate assembly. Remove the screws fixing the left side plate and chassis, and then remove the left side plate assembly.
Page 86 Step 4: Remove fan motor and axial flow blade Remove the nuts fixing the fan to remove the axial flow blade Remove the four (4) tapping screws fixing the motor, disconnect the leading wire insert of the motor and then remove the motor. Remove the two (2) tapping screws fixing the motor support and then pull the motor support upwards to remove...
Page 87 Step 5: Remove electric box Remove the screws fixing the electric box assembly; loosen the wire bundle; pull out the wiring terminals and then pull the electric box upwards to remove it.
Page 88 Step 6: Remove soundproof sponge and four-way valve The piping ports on the soundproof sponge are torn easily, remove the soundproof sponge carefully. Recover all the refrigerant from the system. Unsolder the pipelines connecting the compressor and condenser assembly. Then remove the 4-way valve assembly. Note: Wrap the valve body with wet cloth completely while unsoldering to avoid damaging the valve caused by high...
Page 89 Step7: Remove isolation sheet Remove the three (3) screws fixing the isolation sheet to remove it. Step8: Remove cut of valve and valve support Unscrew the two (2) bolts fixing the valve assembly. Unsolder the brazed joint connecting the gas valve and the suction pipe.
Page 90 Step 9: Remove compressor Twist off the three foot-nuts on the compressor with spanner, as well as the foot cushions, and then remove the compressor. Step 10: Remove support Remove the screws connecting the support and condenser assembly, and then remove the support.
Page 91 Step 11: Remove condenser assembly Separate the chassis assembly and condenser assembly.
Page 92: Quad Port (Smz30H421Zogb)
12.1.3 Quad Port (SMZ30H421ZOGB) Step 1: Remove handle Remove the screws connecting the handle with the right side plate to release it. Step 2: Remove top cover Remove the screws connecting the top cover with the outer case, the right side plate and the left side plate.
Page 93 Step 4: Remove rear guard grille Remove the six (6) screws connecting the grille with the right side plate and the left side plate, and then remove the rear guard grille. Step 5: Remove right side plate Remove the screws connecting the right side plate with electric box assembly, valve support, chassis and condenser side plate.
Page 94 Step 6: Remove front grille and outer case outer case Remove the four (4) screws connecting the front grille and outer case, and then remove the grille. Step 7: Remove outer case Remove the screws connecting outer case and motor support, middle isolation sheet and chassis, pull the outer case upward slightly, loosen clasps between outer case and the right side plate, the left side plate, and then...
Page 95 Step 9: Remove fan blade, motor and motor support a. Remove the nuts fixing axial flow blade with wrench, and then remove the fan blade. b. Remove the two (2) screws connecting motor support and chassis, loosen damper block and then remove the motor support.
Page 96 Step 11: Remove valve support Unsolder all brazed joint connected with valve support and then remove the valve support. Note: Wrap gas valve and liquid valve with wet cloth completely while unsoldering to avoid damaging the valve caused by high temperature.
Page 97 Step 13: Remove compressor Twist off the three foot-nuts on the compressor with spanner, as well as the foot cushions, and then remove the compressor. Note: Seal the ends of the discharge pipe and suction pipe to prevent the moisture and dust.
Page 98 Step 15: Remove middle isolation sheet Remove the screws connecting the middle isolation sheet and support plate of the condenser, chassis, and then remove the middle isolation sheet. Step 16: Remove left side plate Remove the screws connecting the left side plate and support plate of condenser, chassis and then remove the left side plate.
Page 99 Step 17: Remove condenser Remove the five (5) screws connecting the condenser and chassis and then remove the condenser. Remove the two (2) screws connecting support plate and condenser, and then remove the support plate of condenser.
Page 100: Five Port (Smz42H421Zogb)
12.1.4 Five Port (SMZ42H421ZOGB) Step 1: Remove the handle Remove the screws connecting the handle with the right side plate and then remove the handle. Step 2: Remove top cover Remove the screws connecting the top cover with the outer case, right side plate and left side plate;...
Page 101 Step 3: Remove front side plate Remove the screws connecting the front side plate with chassis and middle isolation sheet, and then remove the front side plate. Step 4: Remove right side plate Remove the screws connecting the right side plate with electric box assembly, valve support, chassis...
Page 102 Step 5: Remove grille and outer case outer case Remove the four (4) screws connecting the grille and the outer case, and then remove the front grille. Step 6: Remove the outer case Remove the screws connecting the outer case and motor support, middle isolation sheet and chassis, pull the outer case upwards slightly, loose clamps between the outer case and the...
Page 103 Step 7: Remove electric box assembly a. Remove the grounding wire screw on the electric box assembly and then remove the grounding wire. b. Disconnect the wiring terminals of reactor, compressor, high and low pressure switches, compressor overload protector, temperature sensor, outdoor fan motor and four-way valve.
Page 104 Step 9: Remove four-way valve assembly Recover all the refrigerant from the system. Unsolder the brazed joint between the four- way valve and accumulate, the compressor cut- off valve and condenser assembly. Then remove the 4-way valve assembly. Note: Wrap the valve body with wet cloth completely while unsoldering...
Page 105 Step 11: Remove connection pipe assembly Unsolder all brazed joint connected with connection pipe and then remove it. Step 12: Remove compressor Twist off the three foot-nuts on the compressor with spanner, as well as the foot cushions, and then remove the compressor.
Page 106 Step 13: Remove the accumulate Unsolder all brazed joint connected with the accumulate accumulate, remove the two (2) foot nuts fixing it and compressor mounting plate assembly, and then remove the accumulate. Step 14: Remove compressor mounting plate assembly Remove the four (4) foot nuts fixing compressor mounting plate assembly and chassis to release it.
Page 107 Step 15: Remove the reactor Remove the four (4) screws fixing the reactor and the middle isolation sheet, and then remove the reactor. Step 16: Remove middle isolation sheet Remove the screws connecting the middle isolation sheet and support plate of the condenser, chassis, and then remove the middle isolation sheet.
Page 108 Step 17: Remove left side plate Remove the screws connecting the left side plate and the support plate of condenser, chassis and then remove the left side plate. Step 18: Remove condenser Remove the five (5) screws connecting the condenser and chassis and then remove the condenser.
Page 109: Indoor Units
12.2 Indoor Units 12.2.1 Wall Mounted Step 1: Remove front panel Open front panel and remove the screws holding the indicator. Push the rotor shaft on both sides of the panel to make it separate from the groove. Then remove the panel.
Page 110 Remove middle axle sleeve of horizontal louver and then slightly bend the horizontal louver to remove Step 4: Remove front case Remove the screws holding in the front case. Loosen clasps in the middle of the front case and then turn over the front case to remove it Step 5: Remove water tray Remove the screws of electric box cover 1 and loosen the clasps.
Page 111 grounding screw Step 6: Remove electric box Remove grounding screw evaporator and the screws of the electric box. Unplug the connecting wire for the indoor motor. Loosen the clasps of the electric box and then remove the electric box. Step 7: Remove left side plate Remove the screws fixing chassis and condenser support to remove the left side plate.
Page 112 Step 8: Remove motor and cross flow blade...
Page 113 Remove the screws fixing the motor clamp and then remove the clamp. Remove connection screws between the motor and cross flow blade to remove the components.
Page 114: Console
12.2.2 Console Step 1: Remove panel Pull the slide clasps at both sides of the panel. Pull the panel outwards, then lift up to remove the panel. Step 2: Remove filter Loosen the clasp on the upper side of the filter, then pull panel outwards to remove Step 3: Remove front case Remove the tapping screws fixing the isolation...
Page 115 Step 4: Remove swing assembly Remove the two (2) screws that fixes the swing assembly in place. Pull out the connection wires with the electric box and then pull the swing assembly outwards to remove it. Step 5: Remove water tray assembly Remove the two (2) screws that fixes the water tray in place.
Page 116 Step 7: Remove piping stopper Remove nuts on the centrifugal blade and then pull the centrifugal blade outwards to remove it. Step 8: Remove water tray assembly Remove the two (2) screws that fixes the water tray in place. Pull the water tray outwards to remove it.
Page 117 Step 10: Remove piping stopper Remove nuts on the centrifugal blade and then pull the centrifugal blade outwards to remove it. Step 11: Remove water tray assembly Remove the two (2) screws that fixes the water tray in place. Pull the water tray outwards to remove it.
Page 118: Cassette
12.2.3 Cassette 12.2.3.1 Disassembly and Reassembly of Fan Motor Step 1: Loosen the screws fixing the water tray Use a screwdriver to loosen the screws that hold the water tray in place. Step 2: Remove water tray Remove the water tray by lifting it off of the rest of the unit.
Page 119 Step 4: Remove fan Remove the fan by lifting it off of the rest of the unit. Step 5: Loosen the screws fixing the motor Use a screwdriver to loosen the screws that hold the motor in place.
Page 120 Step 6: Replace the motor Remove the old motor and replace with a new one, if necessary. Step 7: Tighten the screws fixing the motor Use a screwdriver to tighten the screws that hold the motor in place.
Page 121 Step 8: Mount the fan Mount the fan and use a spanner to tighten the bolts that hold the fan in place. Step 9: Mount the water tray Use a screwdriver to tighten the screws that fix the water tray.
Page 122 12.2.3.2 Disassembly and Reassembly of Drainage Pump Step 1: Loosen the screws fixing the water tray Use a screwdriver to loosen the screws that hold the water tray in place. Step 2: Remove water tray Remove the water tray by lifting it off of the rest of the unit.
Page 123 Step 4: Replace pump Take out the pump and replace it with a new one, if necessary. Step 5: Fix the water pump Connect the drainage pipe and tighten the screws fixing the water pump. Step 6: Replace water tray Mount the water tray and tighten the screws holding it in place.
Page 124: Floor/Ceiling
12.2.4 Floor/Ceiling Step 1: Remove front panel Pull down on the clip on the front grill until the grill is open (as shown in the diagram; arrow represents the position of the buttons; there are two clips for each “grill”). Step 2: Remove left and right plates Remove the screws (as shown in diagram) with a screwdriver and then push upward to remove the...
Page 125 Step 4: Remove electric box cover Remove the three (3) screws (as shown by the arrow in the graph) to remove the electric box cover. Step 5: Remove the air flow louvers Remove the air flow louvers from the louver support subassembly and then remove both ends from the louver motor joint.
Page 126 Step 7: Remove evaporator components Remove the screws as shown by the arrow in the graph with a screwdriver. (There are six (6) screws on the left and right of the evaporator and five (5) on the evaporator outlet press plates) Step 8: Remove the fan plate subassembly Remove the screws (as shown in diagram) with a...
Page 127 Step 9: Remove front and back scroll cases Press the buckle at the joints of the front and back scroll cases and pull upward to remove the front scroll case. Then remove the screws on the back scroll case. Lift the buckle of the back scroll case with hands and remove it.
Page 128: Ducted
12.2.5 Ducted Step 1: Remove electric wire Turn off the power supply to the system. Open the cover plate of the electric box, then disconnect the electric wires inside the box. Step 2: Remove plate for the inlet air Loosen the screws used to fix the cover plate for the inlet air with a screwdriver.
Page 129 Step 5: Loosen the fan blade and motor Loosen the screws used to fix the fan blades and then undo the buckle used to fix the motor. Step 6: Remove the motor Separate the motor from the motor frame. Remove the fan blade, then take the motor out of the inlet air frame.
Page 130: Specifications
13. Specifications 13.1 Indoor Units 13.1.1 Wall Mounted B Model Number SHE9H4ZIGB SHE12H4ZIGB SHE18H4ZIGB SHE24H4ZIGB Product Code 243-2007-E 243-2008-E 243-2009-E 243-2010-E Rated Voltage 208-230V AC / 1 PH 208-230V AC / 1 PH 208-230V AC / 1 PH 208-230V AC / 1 PH Min.
Page 131: Console
13.1.2 Console Model Number SMZC9H4ZIGX SMZC12H4ZIGX SMZC18H4ZIGX Product Code 243-6001-E 243-6002-E 243-6003-E Rated Voltage 208-230V AC / 1 PH 208-230V AC / 1 PH 208-230V AC / 1 PH Control Remote Remote Remote Setting Range 61°F to 86°F 61°F to 86°F 61°F to 86°F Cooling Capacity (BTU/H) 9000 (3100~9600)
Page 132: Cassette
13.1.3 Cassette Model Of Indoor Unit SMZCA12H4ZIGX SMZCA18H4ZIGX SMZCA24H4ZIGX Product Code 243-6004-E 243-6005-E 243-6006-E Rated Voltage 208-230V AC / 1 PH 208-230V AC / 1 PH 208-230V AC / 1 PH Remote (standard) or Remote (standard) or Remote (standard) or Control Wall (optional) Wall (optional)
Page 133 Model Of Indoor Unit SMZCA12H4ZIGC SMZCA18H4ZIGC SMZCA24H4ZIGC Product Code 243-6018-E 243-6019-E 243-6020-E Manufacturer Code CN510N0190 CN510N0210 CN510N0200 Rated Voltage 208/230 VAC / 1 PH / 60 Hz Cooling Capacity (BTU/H) 12000 14400 228000 Heating Capacity (BTU/H) 13000 16000 27400 Performance Indoor Air Circulation (CFM) &...
Page 134: Floor/Ceiling
13.1.4 Floor/Ceiling Model Of Indoor Unit SMZFC9H4ZIGX SMZFC12H4ZIGX SMZFC18H4ZIGX SMZFC24H4ZIGX Product Code 243-6007-E 243-6008-E 243-6009-E 243-6010-E Rated Voltage 208-230V AC / 1 PH 208-230V AC / 1 PH 208-230V AC / 1 PH 208-230V AC / 1 PH Remote (standard) or Remote (standard) or Remote (standard) or Remote (standard) or...
Page 135: Ducted
13.1.5 Ducted Model Of Indoor Unit SMZD9H4ZIGX SMZD12H4ZIGX SMZD18H4ZIGX SMZD21H4ZIGX SMZD24H4ZIGX 243-6014-E 243-6015-E Product Code 243-6011-E 243-6012-E 243-6013-E 208-230V AC / 1 PH Rated Voltage 208-230V AC / 1 PH 208-230V AC / 1 PH 208-230V AC / 1 PH 208-230V AC / 1 PH Wall (standard) or Wall (standard) or...
Page 136: Outdoor Units
13.2 Outdoor Units 13.2.1 Dual Port Model Number 243-1008-C SMZ18H422ZOGB Rated Voltage & Frequency and Phase 208-230V / 60Hz / 1PH Min./ Max. Operating Voltage 187 / 253 VAC Circuit Breaker Size (A) Working Temperature Range (°F) Cooling: -0.4 to 118; Heating: -4 to 75 Refrigerant (R410A) (oz.) 56.45 EER (W/W) / (Btu/h/W)
Page 137: Triple Port
13.2.2 Triple Port Model Number 243-1009-C SMZ24H421ZOGB Rated Voltage & Frequency and Phase 208-230V / 60Hz / 1PH Min./ Max. Operating Voltage 187 / 253 VAC Circuit Breaker Size (A) Working Temperature Range (°F) Cooling: -0.4 to 118; Heating: -4 to 75 Refrigerant (R410A) (oz.) 77.60 EER (W/W) / (Btu/h/W)
Page 138: Quad Port
13.2.3 Quad Port Model Number 243-1010-C SMZ30H421ZOGB Rated Voltage & Frequency and Phase 208-230V / 60Hz / 1PH Min./ Max. Operating Voltage 187 / 253 VAC Circuit Breaker Size (A) Working Temperature Range (°F) Cooling: -0.4 to 118; Heating: -4 to 86 Refrigerant (R410A) (oz.) 98.76 EER (W/W) / (Btu/h/W)
Page 139: Five Port
13.2.4 Five Port Model Number 243-1011-C SMZ42H421ZOGB Rated Voltage & Frequency and Phase 208-230V / 60Hz / 1PH Min./ Max. Operating Voltage 187 / 253 VAC Circuit Breaker Size (A) Working Temperature Range (°F) Cooling: -0.4 to 118; Heating: -4 to 86 Refrigerant (R410A) (oz.) 128.75 EER (W/W) / (Btu/h/W)
Page 140: Appendix
14. Appendix 14.1 Appendix I: Resistance of Ambient Temperature Sensor (15K) for Indoor/Outdoor Units (F1,F3) Temp. (°F) Resistance (kΩ) Temp. (°F) Resistance (kΩ) Temp. (°F) Resistance (kΩ) Temp. (°F) Resistance (kΩ) -2.2 138.1 68.0 18.75 138.2 3.848 208.4 1.071 -0.4 128.6 69.8 17.93...
Page 141: Appendix Ii: Resistance Of Tube Temperature Sensor (20K) For Indoor/Outdoor Units (F2,F4)
14.2 Appendix II: Resistance of Tube Temperature Sensor (20K) for Indoor/Outdoor Units (F2,F4) Temp. (°F) Resistance (kΩ) Temp. (°F) Resistance (kΩ) Temp. (°F) Resistance (kΩ) Temp. (°F) Resistance (kΩ) -2.2 181.4 68.0 25.01 138.2 5.130 208.4 1.427 -0.4 171.4 69.8 23.90 140.0 4.948...
Page 142: Appendix Iii: Resistance Of Exhaust Temperature Sensor (50K) For Outdoor Units (F5)
14.3 Appendix III: Resistance of Exhaust Temperature Sensor (50K) for Outdoor Units (F5) Temp. (°F) Resistance (kΩ) Temp. (°F) Resistance (kΩ) Temp. (°F) Resistance (kΩ) Temp. (°F) Resistance (kΩ) -20.2 853.5 120.2 18.34 190.4 4.75 -18.4 799.8 51.8 93.42 17.65 192.2 4.61 -16.6...
Page 143: Appendix Iv: Pressure On Service Port
14.4 Appendix IV: Pressure on Service Port. Dual Port (SMZ18H422ZOGB)
Page 144: Triple Port (Smz24H421Zogb)
Triple Port (SMZ24H421ZOGB)
Page 145: Quad Port (Smz30H421Zogb)
Quad Port (SMZ30H421ZOGB)
Page 146: Five Port (Smz42H421Zogb)
Five Port (SMZ42H421ZOGB)
Page 147: Appendix Iv: Cooling / Heating Capacity Tables
-15 °C -8 °C 8 °C 25 °C 30 °C 35 °C 40 °C 45 °C TEMPERATURE SHE9H4ZIGB – 2 pcs 5 °F 17 °F 47 °F 77 °F 86 °F 95 °F 104 °F 113 °F Total capacity (Btu/h)
Page 148: Triple Port (Smz24H421Zogb)
-15 °C -8 °C 8 °C 25 °C 30 °C 35 °C 40 °C 45 °C TEMPERATURE SHE9H4ZIGB – 3 pcs 5 °F 17 °F 47 °F 77 °F 86 °F 95 °F 104 °F 113 °F Total capacity (Btu/h)
Page 149: Quad Port (Smz30H421Zogb)
OUTDOOR TEMPERATURE (Dry Bulb) CONNECTED INDOOR UNIT: INDOOR 20 °C 25 °C 30 °C 35 °C 40 °C 45 °C SHE9H4ZIGB – 2 pcs TEMPERATURE 68 °F 77 °F 86 °F 95 °F 104 °F 113 °F SHE12H4ZIGB – 1 pcs...
Page 150: Five Port (Smz42H421Zogb)
OUTDOOR TEMPERATURE (Dry Bulb) CONNECTED INDOOR UNIT: INDOOR 20 °C 25 °C 30 °C 35 °C 40 °C 45 °C SHE9H4ZIGB – 2 pcs TEMPERATURE 68 °F 77 °F 86 °F 95 °F 104 °F 113 °F SHE12H4ZIGB – 2 pcs...

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