Sinclair MULTIZONE Series Original Instructions Manual

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Service Manual

Ver.

01 12 05 2025

MULTIZONE SERIES

OUTDOOR UNITS

MZ-2E18BI

MZ-3E27BI

MZS-2E18BI

MZS-3E27BI

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Summary of Contents for Sinclair MULTIZONE Series

Page 1 Service Manual Ver. 01 12 05 2025 MULTIZONE SERIES OUTDOOR UNITS MZ-2E18BI MZ-3E27BI MZS-2E18BI MZS-3E27BI...
Page 2 „ O R I G I N A L I N S T R U C T I O N S “ I M P O R T A N T N O T E : Read this manual carefully before installing or operating your new air conditioning unit. Make sure to save this manual for future reference.
Page 3 CONTENTS 1. General information of Outdoor Units ........2 2. Features .................. 3 3. Dimensions ................4 4. Refrigeration Cycle Diagram ..........5 5. Wiring diagram ............... 9 6. Indoor units combination ............ 23 7. Sound Levels ................ 30 8. Installation Details ............... 31 8.1 Wrench torque sheet for installation ................
Page 4 General information of Outdoor Units Model name Dimension (mm) Compressor MZ-2E18BI 805x330x554 KSN140D58UFZ MZ-3E27BI 890x342x673 KTM240D57UMT MZS-2E18BI 890x342x673 KSN140D58UFZ MZS-3E27BI 946x410x810 KTM180D68UMT...
Page 5 Features Outdoor unit Power relay control Low noise air flow system Hydrophilic aluminum fin The hydrophilic fin can improve the heating efficiency at operation mode. 4 way valve control It is only operated in the heating operation mode except defrosting operation. Anti-rust cabinet Valve protection cover It protects the valves and prevents water from dripping.
Page 6 Dimensions Unit：mm Model MZ-2E18BI MZ-3E27BI MZS-2E18BI MZS-3E27BI 1034...
Page 7 Refrigeration Cycle Diagram Refrigeration circuit drawing of inverter 1 drive 2 type MZ-2E18BI MZ-2E18BI, , MZS-2E18BI INDOOR INDOOR OUTDOOR OUTDOOR EXV A EXV A LIQUID VALVE A LIQUID VALVE A CAPILLARY CAPILLARY EXV B EXV B LIQUID VALVE B LIQUID VALVE B Condenser Condenser temp.
Page 8 4.2 Refrigeration circuit drawing of inverter 1 drive 3 type MZS-3E27BI INDOOR OUTDOOR EXV A LIQUID VALVE A EXV B LIQUID VALVE B CAPILLARY TUBE EXV C LIQUID VALVE C Condenser temp. sensor HEAT EXCHANGE (EVAPORATOR) HEAT T4 Ambient T1 Room EXCHANGE temp.
Page 9 Wiring diagram MZ-2E18BI...
Page 10 Note: S(1)&S(2) are used in other type of models. They don't need to be connected in multi models.
Page 11 MZS-2E18BI...
Page 12 MZS-3E27BI...
Page 13 MZ-3E27BI...
Page 14 Indoor units combination 6.1 Indoor unit combination for MZ-2E18BI & MZS-2E18BI One unit Two units 7+18 9+18 12+12 7+12 9+12 12+18 6.2 Indoor unit combination for MZ-3E27BI One unit Two units Three units 7+18 9+18 7+7+7 7+9+12 9+9+12 12+12 7+7+9 7+9+18 9+9+18 7+12...
Page 15 Sound Levels Outdoor Unit Microphone 1.0m Note: H= 0.5 × height of outdoor unit Model Noise Power dB(A) Noise level dB(A) MZ-2E18BI MZS-2E18BI MZS-3E27BI MZ-3E27BI 61.2...
Page 16 Installation Details 8.1 Wrench torque sheet for installation Torque Additional tightening torque Outside diameter N.cm N.cm Ф6.35 1600(163kgf.cm) 1500(153kgf.cm) Ф9.52 2600(265kgf.cm) 2500(255kgf.cm) Ф12.7 3600(367kgf.cm) 3500(357kgf.cm) 8.2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet. Nominal cross-sectional area (mm²) Rated current of appliance >3 and ≤6...
Page 17 2. Oil traps -If oil flows back into the outdoor unit’s compressor, this might cause liquid compression or deterioration of oil return. Oil traps in the rising gas piping can prevent this. -An oil trap should be installed every 6m(20ft) of vertical suction line riser (<36000Btu/h unit). -An oil trap should be installed every 10m(32.8ft) of vertical suction line riser (≥36000Btu/h unit).
Page 18 Liquid 9.52(3/8) Liquid 9.52(3/8) 15.9(5/8) 15.9(5/8) Outdoor unit union diameter (mm/inch) Liquid 6.35(1/4) 1 drive 2 9.52(3/8) Liquid 6.35(1/4) 9.52(3/8) 1 drive 3(MZS-3E27BI) 12.7(1/2) Liquid 6.35(1/4) 1 drive 3(other models) 9.52(3/8) Liquid 6.35(1/4) 9.52(3/8) 1 drive 4(other models) 12.7(1/2) Liquid 6.35(1/4) 9.52(3/8) 1 drive 5...
Page 19 8.4 Installation for the first time Air and moisture in the refrigerant system have undesirable effects as below: ● Pressure in the system rises. ● Operating current rises. ● Cooling or heating efficiency drops. ● Moisture in the refrigerant circuit may freeze and block capillary tubing. ●...
Page 20 coming out, then tighten the flare nut again. Make sure the pressure display in the pressure indicator is a little higher than the atmosphere pressure. Then remove the charge hose from the 3 way valve. 8) Fully open the 2 way valve and 3 way valve and securely tighten the cap of the 3 way valve.
Page 21 2. Adding the refrigerant if the pipe length >5m Electronic scale Procedure: 1). Connect the charge hose to the charging cylinder, open the 2-way valve and the 3-way valve. Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder.
Page 22 8.5 Adding the refrigerant after running the system for many years Electronic scale Procedure: 1). Connect the charge hose to the 3-way service port, open the 2-way valve and the 3-way valve. Connect the charge hose to the valve at the bottom of the cylinder. If the refrigerant is R410A, make the cylinder bottom up to ensure liquid charge.
Page 23 8.6 Re-installation while the indoor unit need to be repaired 1. Collecting the refrigerant into the outdoor unit Procedure 1). Confirm that both the 2-way and 3-way valves are set to the opened position Remove the valve stem caps and confirm that the valve stems are in the opened position. Be sure to use a hexagonal wrench to operate the valve stems.
Page 24 2. Air purging with vacuum pump (Indoor unit) (Outdoor unit) (Liquid side) Two-way valve Close (Gas side) Three-way valve Close Manifold valve Compound meter Pressure gauge -0.1MPa Handle Lo Handle Hi Charge hose Charge hose Vacuum pump Vacuum pump Procedure: 1) Completely tighten the flare nuts of the indoor and outdoor units, confirm that both the 2-way and 3-way valves are set to the closed position.
Page 25 8.7 Re-installation while the outdoor unit need to be repaired 1. Evacuation for the whole system Procedure: 1). Confirm that both the 2-way and 3-way valves are set to the opened position. 2). Connect the vacuum pump to 3-way valve’s service port. 3).
Page 26 2. Refrigerant charging Procedure: 1). Connect the charge hose to the charging cylinder, open the 2-way valve and the 3-way valve Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder.
Page 27 Electronic control function 9.1 Abbreviation T1: Indoor ambient temperature T2: Coil temperature of indoor heat exchanger middle. T2B: Coil temperature of indoor heat exchanger outlet(This sensor is located in outdoor unit) T3: Coil temperature of outdoor heat exchanger T4: Outdoor ambient temperature TP: Compressor discharge temperature Ts: Setting temperature 9.2 Electric control working environment.
Page 28 9.4 Outdoor unit point check function A check switch is included on the outdoor PCB. Push SW1 to check the unit's status while running. The digital display shows the following codes each time the SW1 is pushed. For MZS-2E18BI, MZS-3E27BI, MZ-3E27BI Display Remark Number...
Page 29 Indoor unit E evaporator temperature (T Condenser pipe temperature (T3) Outdoor ambient temperature (T4) Compressor discharge temperature (TP) The display value is between 30–129 ℃. If the temperature is lower than 30 ℃, the digital display shows “30.” If the temperature is higher than 99 ℃, light the decimal point of the high digit tube.
Page 30 Target discharge temperature The display value is between 0–199℃. If the temperature is lower than 30℃, the digital display shows “30.” If the temperature is higher than 99oC, the digital display shows single and double digits. For example, If the display shows 0.5, so 0.5 multipled by 10 to become 5, then added to 100 to become 105℃..
Page 31 For other models, Number Display Remark Presses Displays running frequency, running state, or malfunction code Normal display Quantity of indoor units with working connection Actual data Display Number of indoor unit Outdoor unit running mode code Off: 0,Fan only: 1, Cooling: 2, Heating: 3, Forced cooling: 4. Forced defrosting :A Indoor unit A capacity Indoor unit B capacity...
Page 32 AD value of voltage For example, the digital display tube shows “Cd”, it means AD value is 205. EXV open angle for A indoor unit EXV open angle for B indoor unit Actual data/4. If the value is higher than 99, the digital display shows single and double EXV open angle for C indoor unit digits.
Page 33 9.5 Protection 9.5.1 Three minutes delay at restart for compressor. 9.5.2 Sensor redundancy and automatic shutoff If one temperature sensor(T3, T4, T2B or TP) malfunctions, the unit ceases operation and displays the corresponding error code. 9.5.3 Automatic shutoff based on fan If the outdoor fan speed is operating outside of the normal range, fan lack of phase or fan zero speed failure, the unit ceases operation.
Page 34 10. Troubleshooting 10.1 Indoor unit error code explanation: For SKY type: Running Timer Lamp Display Error Information Lamp EH 00/EH 1 time Indoor EEPROM parameter error 2 times EL 01 Indoor/outdoor unit communication error 3 times EH 02 Zero-crossing signal detection error The indoor fan speed is operating outside of the 4 times EH 03...
Page 35 Indoor room temperature sensor T1 is in open circuit 6 times EH 60 or has short circuited Evaporator coil middle temperature sensor T2 is in 6 times EH 61 open circuit or has short circuited The outdoor fan speed is operating outside of the 12 times EC 07 normal range...
Page 36 10.2 Outdoor unit error code explanation: For MZ-3E27BI, MZS-3E27BI, MZS-2E18BI Display LED STATUS EC 51 Outdoor EEPROM malfunction EL 01 Indoor / outdoor units communication error PC 40 Communication malfunction between IPM board and outdoor main board PC 08 Outdoor overcurrent protection Outdoor unit low AC voltage protection PC 10 Outdoor unit main control board DC bus high voltage protection...
Page 37 EC 54 Compressor discharge temperature sensor TP is in open circuit or has short circuited EC 56 Evaporator coil outlet temperature sensor T2B is in open circuit or has short circuited EC 50 Open or short circuit of outdoor unit temperature sensor(T3,T4.TP) PC65 TR_in high temperature protection(ATW) PC61...
Page 38 Low ambient temperature protection Note: Once these error codes display, they will disappear in at least 30 seconds if the unit come back to normal.(Except E2&E3)
Page 39 10.3 Trouble shooting 10.3.1 For the indoor unit 10.3.1.1 Indoor EEPROM malfunction (IDU E0/EA/EH 00/EH 0A) Power off, then restart the unit 2 minutes later Replace the indoor main PCB EEPROM: An electrically erasable programmable read-only memory whose contents can be erased and reprogrammed using a pulsed voltage.
Page 40 10.3.1.2 Indoor / outdoor units communication error(E1(IDU)/ E2(ODU)/ EL 01(IDU/ODU)) Indoor / outdoor units communication error Start: Power off , then Power on the A/C by the Breaker. (reconnect the power wire). Is it still displaying the error code? Check wiring on the outdoor and indoor terminal follow the wiring diagram.
Page 41 Pic 1: check the voltage of N to S (Vs), is it moving alternately between positive value and negative value? Pic 2:IPM or outdoor main PCB Operating Self-Check Pic 2: IPM or outdoor main PCB Power, Self-Check Operating...
Page 42 PIC3 :Main board LED when power on and unit standby. PIC 4: check point button, Press 1 time for check how many indoor units are connected...
Page 43 10.3.1.3 Indoor fan speed has been out of control (IDU E3/ EH 03 ) Upper indoor fan speed is operating outside of the normal range( EH 31 )(for new console type) Lower indoor fan speed is operating outside of the normal range( EH 32 ) (for new console type) Power off, then restart the Power off, then restart the unit 2 minutes later.
Page 44 DC motor voltage input and output For split type: Color Signal Voltage Vs/Vm 280V~380V Black White 14-17.5V Yellow 0~5.6V Blue 14-17.5V For other types: Color Signal Voltage Vs/Vm 192V~380V Black White 13.5-16.5V Yellow 0~6.5V Blue 13.5-16.5V...
Page 45 3. Indoor DC Fan IPM Board (Duct Unit) Port Description Parameter Remark CON1 Power input for the PCB 230V/AC Communication with main PCB Test port 5V/DC For debugging board UVW output for DC fan motor CN23 Ports for reactor CON2 CN1 Communication with main PCB Signal Voltage...
Page 46 10.3.1.4 Open or short circuit of temperature sensor(IDU E4/E5/EH 60/EH 61) Check the connections Check the connections between temperature between temperature Correct the connections. Correct the connections. sensor and PCB. Are the sensor and PCB. Are the connections good? connections good? Measure the resistance value Measure the resistance value of the sensor via Appendix 1...
Page 47 10.3.1.7 Communication error between the indoor PCB and display board(IDU Eb/EH 0b) Power off, then restart the unit 2 minutes later Check the wirings Correct the connection and connection or replace the wirings Replace the indoor main PCB Replace the Display board 10.3.1.8 Inverter compressor drive malfunction(IDU P4/ PC04) The trouble shooting is same with IPM module protection.
Page 48 10.3.1.10 Refrigerant Leakage Detection(IDU EC/ EL 0C) Power off, then restart the unit 2 minutes later. Does a problem remain? Put your hands in front of the indoor air outlet. Is there cool air blowing out from Check the T2 sensor. indoor air outlet? Is it securely Replace the...
Page 49 10.3.1.11 Communication malfunction between external fan module and indoor unit( EH b A ) External fan DC bus voltage is too low protection( EH 3A ) External fan DC bus voltage is too high fault( EH 3b )
Page 50 10.3.1.12 Communication malfunction between fresh air motor module and indoor unit diagnosis and solution(EH bA)(GAIA type) Shut off the power supply and turn it on 2 minutes later. Is it still displaying The unit is operating normally. the error code? Check the wiring and connections between Indoor PCB and module board Are all the...
Page 51 Power off, then restart the Power off, then restart the unit 2 minutes later unit 2 minutes later Replace the outdoor main PCB Replace the outdoor main PCB EEPROM: An electrically erasable programmable read-only memory whose contents can be erased and reprogrammed using a pulsed voltage.
Page 52 10.3.3.3 Communication malfunction between IPM board and outdoor main board(ODU E3/PC 40) E3 display Communication malfunction between IPM board and outdoor main board Is there at least one LED in the IPM board light? Check the signal wire between the IPM board and the main board, is it connected good? Reconnect and retry.
Page 53 10.3.3.4 Voltage protection(ODU E5) Outdoor unit low AC voltage protection(PC10) Outdoor unit main control board DC bus high voltage protection(PC11) Outdoor unit main control board DC bus high voltage protection /341 MCE error(PC12) Voltage protection Check the voltage of outdoor unit power supply, whether the voltage Check the power supply between L(L1) and N (L2) is...
Page 54 10.3.3.5 PFC module protection (ODU E6/PC 0F) PFC module protection Check whether the connecting line between Connect it tightly, check main board and the PFC normal or not module(IPM module) is connected tightly Check whether the voltage range of P-N on IPM module Replace the outdoor main board is normal? DC277-356V for 18-27KBtu/h;...
Page 55 10.3.3.6 Outdoor fan speed has been out of control or compressor speed has been out of control (ODU E8/EC 07) Over current failure of outdoor DC fan motor (ODU EC71) Power off, then restart the unit after 2 minutes. Does a problem remain? The unit is operating normally Shut off the power supply, Rotate the fan by hand.
Page 56 Index 1: 1. Outdoor DC fan motor(control chip is inside fan motor) Power on and when the unit is in standby, measure the voltage of pin1-pin3, pin4-pin3 in fan motor connector. If the value of the voltage is not in the range showing in below table, the PCB must have problems and need to be replaced.
Page 57 Port Description Parameter Remark CON1 Power input for the PCB 192-380V/DC Communication with main PCB Test port 5V/DC For debugging board FAN1 UVW output for DC fan motor FAN2 UVW output for DC fan motor CN1 Communication with main PCB Signal Voltage +15V...
Page 58 10.3.3.9 Current protection of compressor (ODU P3/PC 08) Outdoor unit zero speed protection(ODU PC44) Compressor speed has been out of control(ODU PC46) Compressor overcurrent failure(ODU PC49) Current protection of compressor Judge 1: Check whether the input current of the power supply wire is higher than max protection current value Check whether...
Page 59 10.3.3.10 Temperature protection of compressor discharge (ODU P4/ PC 06) Temperature protection of Temperature protection of compressor discharge compressor discharge Check whether the Check whether the Check whether the Check whether the compressor discharge temp. is compressor discharge temp. is Stop leaking and add refrigerant Stop leaking and add refrigerant refrigerant is leak...
Page 60 10.3.3.11 High temperature protection of condenser (ODU P5/ PC 0A) When outdoor pipe temperature is more than 65°C, the unit will stop, and unit runs again when outdoor pipe temperature less than 52°C. Check the connection Check the connection between temperature Correct the connection Correct the connection between temperature...
Page 61 10.3.3.12 IPM module protection (ODU P6/PC 00) IPM module protection Check whether the voltage range Check whether the input Regulate it to correct, then of P-N on IPM module is normal? power supply is correct? check whether the system DC277-356V for 18-28KBtu/h; 208-230V, 1N, 60Hz can work normally? DC277-410V for 36-42KBtu/h...
Page 62 Check if the air flow system Clear up the air inlet and outlet or the heat of indoor and outdoor units exchanger of indoor and outdoor units. are obstructed? Turn off the power supply and turn it on 10 minutes later. Check if all the connection, especially Check if the temperature of the connection of OLP (Over Load...
Page 63 10.3.3.14 Lack phase failure of outdoor DC fan motor(EC72) Power off,then restart the unit The unit operates 2 minutes later.Is it still normally displaying the error code Check the wiring of fan motor.Are all the connections Correct the connections good? Check whether the three- phase resistance of the fan is Replace the fan motor...
Page 64 10.3.3.15 Outdoor compressor lack phase protection(PC43) Power off,then restart the unit The unit operates 2 minutes later.Is it still normally displaying the error code Check both ends of compressor connecting Correct the connections line .Are all the connections good? Check whether the three- phase resistance of the Replace the compressor compressor is symmetrical...
Page 65 10.3.3.17 TW_out high temperature protection(PC61) Power off, then restart the unit after 2 minutes. Does a problem remain? The unit is operating normally Check pump Remove the exhaust bolt and turn it in Touch the pump with one batch(Brand GRUNDFOS);Remove your hand and whether the pump head and turn it by it vibrates?
Page 66 10.3.3.18 TR_in high temperature protection (PC65) Power off, then restart the unit after 2 minutes. Does a problem remain? The unit is operating normally Check the connection between Check whether the temperature sensor(TR_in) and water outlet PCB. temperature is too high Is it properly wired? Ensure proper connections.
Page 67 10.3.3.19 Defrosting water temperature too low protection Power off, then restart the unit after 2 minutes. Does a problem remain? The unit is operating normally Turn on the forced electrical auxiliary Whether TR_In Is lower heat until the TR_in reaches 15 than 15 before restarting Check pump...
Page 68 10.3.3.22 Automatic correction of wiring/piping error: Press the "check switch" on the outdoor unit PCB board 5 seconds until LED display "CE", which mean this function is working, Approximately 5-10 minutes after the switch is pressed, the "CE" disappear the wiring/piping error will be corrected, and wiring/piping is properly connected. Check switch LED display 10.3.3.23 If LED display “88”, it shows that air conditioning failed.
Page 69 1. Temperature sensor checking Disconnect the temperature sensor from PCB, measure the resistance value with a tester. Temperature Sensors. Room temperature(T1) sensor, Indoor coil temperature(T2) sensor, Outdoor coil temperature(T3) sensor, Outdoor ambient temperature(T4) sensor, Compressor discharge temperature(TP) sensor. Measure the resistance value of each winding by using the multi-meter.
Page 70 Appendix 1 Temperature Sensor Resistance Value Table for T1,T2,T3,T4,T2B (℃--K) ℃ ℃ ℃ ℃ K Ohm K Ohm K Ohm K Ohm 115.266 12.6431 2.35774 0.62973 108.146 12.0561 2.27249 0.61148 101.517 11.5000 2.19073 0.59386 96.3423 10.9731 2.11241 0.57683 89.5865 10.4736 2.03732 0.56038 84.2190...
Page 71 Appendix 2 Temperature Sensor Resistance Value Table for TP (℃--K) ℃ K Ohm ℃ K Ohm ℃ K Ohm ℃ 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 3.392 430.5 57.37 11.79 3.296 406.7 54.89...
Page 72 2.Compressor checking Measure the resistance value of each winding by using the tester. Position Resistance Value KSM135D23UFZ KTF235D22UMT KTF310D43UMT Blue - 1.72Ω(20℃) 0.75Ω(20℃) 0.65Ω(20℃)
Page 73 3. 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. Digital tester Normal resistance value Digital tester Normal resistance value (+)Red...
Page 74 5.EXV check Disconnect the connectors. Red Brown Blue Orange Yellow White Resistance to EXV coil Color of lead wire Normal Value Red- Blue Red - Yellow About 50Ω Brown-Orange...
Page 75 United Kingdom www.sinclair-world.com This product was manufactured in China (Made in China). R E P R E S E N T A T I V E SINCLAIR Global Group s.r.o. Purkynova 45 612 00 Brno Czech Republic T E C H N I C A L S U P P O R T SINCLAIR Global Group s.r.o.

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