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Daikin SUPER MULTI NX CTXS07JVJU Service Manual

G-series / j-series.
Also See for SUPER MULTI NX CTXS07JVJU:
Operation manual - 34 pages
Service
Manual
G-Series / J-Series
[Applied Models]
 Inverter Multi : Heat Pump
SiUS12-928_B

   Also See for Daikin SUPER MULTI NX CTXS07JVJU

   Related Manuals for Daikin SUPER MULTI NX CTXS07JVJU

   Summary of Contents for Daikin SUPER MULTI NX CTXS07JVJU

  • Page 1

    SiUS12-928_B Service Manual G-Series / J-Series [Applied Models]  Inverter Multi : Heat Pump...

  • Page 2: Table Of Contents

    SiUS12-928_B SUPER MULTI NX G-Series / J-Series Service Manual Heat Pump Indoor Unit CTXS07JVJU CTXS07LVJU FDXS09DVJU CTXS09HVJU FTXS09LVJU FDXS12DVJU CTXS12HVJU FTXS12LVJU FDXS09LVJU FTXS15HVJU FTXS15LVJU FDXS12LVJU FTXS18HVJU FTXS18LVJU CDXS15LVJU CDXS18LVJU Outdoor Unit 2MXS18GVJU 3MXS24JVJU 4MXS32GVJU 1. Safety Considerations................vii 1.1 Safety Considerations for Repair ..............vii 1.2 Safety Considerations for Users..............

  • Page 3: Table Of Contents

    SiUS12-928_B 1. Indoor Unit....................17 1.1 CTXS07JVJU, CTXS09/12HVJU, FTXS15/18HVJU........17 1.2 CTXS07LVJU, FTXS09/12LVJU ..............19 1.3 FTXS15/18LVJU ..................22 1.4 FDXS09/12DVJU ..................25 1.5 FDXS09/12LVJU, CDXS15/18LVJU ............27 2. Outdoor Unit....................29 2.1 2MXS18GVJU .................... 29 2.2 3MXS24JVJU, 4MXS32GVJU..............32 Part 4 Function and Control............

  • Page 4: Table Of Contents

    SiUS12-928_B 2.1 Remote Controller ..................72 2.2 AUTO · DRY · COOL · HEAT · FAN Operation ......... 74 2.3 Adjusting the Airflow Direction..............76 2.4 INTELLIGENT EYE Operation ..............78 2.5 POWERFUL Operation ................80 2.6 OUTDOOR UNIT QUIET Operation............81 2.7 HOME LEAVE Operation ................

  • Page 5: Table Of Contents

    SiUS12-928_B 3. Service Check Function ................138 3.1 ARC452 Series Remote Controller ............138 3.2 ARC433 Series Remote Controller ............141 4. Code Indication on Remote Controller ............144 4.1 Indoor Unit....................144 4.2 Outdoor Unit ..................... 145 5. Troubleshooting for Indoor Unit...............146 5.1 Indoor Unit PCB Abnormality ..............

  • Page 6: Table Of Contents

    SiUS12-928_B 7.14 Capacitor Voltage Check................200 7.15 Power Module Check ................201 Part 7 Removal Procedure ............... 202 1. Outdoor Unit: 2MXS18GVJU ..............203 1.1 Removal of Outer Panels ................. 203 1.2 Removal of Electrical Box ................ 204 1.3 Removal of PCBs ..................209 1.4 Removal of Fan Motor................

  • Page 7

    Safety Considerations SiUS12-928_B 1. Safety Considerations Read these SAFETY CONSIDERATIONS carefully before • Use only pipes, flare nuts, tools, and other materials performing any repair work. Comply with these safety symbols designed specifically for R410A refrigerant systems. without fail.Meanings of DANGER, WARNING, CAUTION, Never use tools or materials designed for R22 and NOTE Symbols: refrigerant systems on an R410A refrigerant system.

  • Page 8

    SiUS12-928_B Safety Considerations • Do not repair the electrical components with wet • Do not damage or modify the power cable. Damaged hands. Working on the equipment with wet hands may or modified power cables may cause an electrical cause an electrical shock. shock or fire.

  • Page 9: Part, List Of Functions

    SiUS12-928_B Part 1 List of Functions 1. Functions.....................2 List of Functions...

  • Page 10: Functions

    SiUS12-928_B Functions 1. Functions Category Functions Category Functions   Basic Function Inverter (with Inverter Power Control) Health & Air-Purifying Filter — — Clean Operation Limit for Cooling (°FDB) — — Operation Limit for Heating (°FWB) — — Photocatalytic Deodorizing Filter —...

  • Page 11

    Functions SiUS12-928_B Category Functions Category Functions   Basic Inverter (with Inverter Power Control) Health & Air-Purifying Filter — — Function Clean Operation Limit for Cooling (°FDB) — — Photocatalytic Deodorizing Filter — — Air-Purifying Filter with Photocatalytic Operation Limit for Heating (°FWB) —...

  • Page 12

    SiUS12-928_B Functions Category Functions Category Functions  Basic Function Inverter (with Inverter Power Control) Health & Air-Purifying Filter — Clean Operation Limit for Cooling (°FDB) — Operation Limit for Heating (°FWB) — Photocatalytic Deodorizing Filter — Air-Purifying Filter with Photocatalytic PAM Control —...

  • Page 13

    Functions SiUS12-928_B Category Functions Category Functions   Basic Inverter (with Inverter Power Control) Health & Air-Purifying Filter — — Function Clean Operation Limit for Cooling (°FDB) — — Photocatalytic Deodorizing Filter — — Air-Purifying Filter with Photocatalytic Operation Limit for Heating (°FWB) —...

  • Page 14

    SiUS12-928_B Functions Category Functions Category Functions   Basic Function Inverter (with Inverter Power Control) Health & Air-Purifying Filter — — Clean Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — — ~ 46 ~ 46 14 ~ 14 ~ Air-Purifying Filter with Photocatalytic Operation Limit for Cooling (°FDB) —...

  • Page 15: Specifications, Part

    SiUS12-928_B Part 2 Specifications 1. Indoor Unit....................8 2. Outdoor Unit....................13 Specifications...

  • Page 16: Indoor Unit

    SiUS12-928_B Indoor Unit 1. Indoor Unit CTXS, FTXS Series 60 Hz, 208 - 230 V CTXS07JVJU Model Cooling Heating Rated Capacity 7 kBtu/h Class Front Panel Color White 388 (11.0) 400 (11.3) Airflow Rate 335 (9.5) 357 (10.1) (m³/min) 283 (8.0) 314 (8.9) Type Cross Flow Fan...

  • Page 17

    Indoor Unit SiUS12-928_B 60 Hz, 230 V FTXS15HVJU FTXS18HVJU Model Cooling Heating Cooling Heating Rated Capacity 15 kBtu/h Class 18 kBtu/h Class Front Panel Color White White 519 (14.7) 515 (14.6) 549 (15.5) 609 (17.2) Airflow Rate 436 (12.3) 459 (13.0) 476 (13.5) 529 (15.0) (m³/min)

  • Page 18

    SiUS12-928_B Indoor Unit 60 Hz, 208 - 230 V FTXS09LVJU FTXS12LVJU Model Cooling Heating Cooling Heating Rated Capacity 9 kBtu/h Class 12 kBtu/h Class Front Panel Color White White 381 (10.8) 420 (11.9) 403 (11.4) 438 (12.4) 279 (7.9) 321 (9.1) 307 (8.7) 335 (9.5) Airflow Rate...

  • Page 19

    Indoor Unit SiUS12-928_B CDXS, FDXS Series 60 Hz, 230 V FDXS09DVJU FDXS12DVJU Model Cooling Heating Cooling Heating Rated Capacity 9 kBtu/h Class 12 kBtu/h Class External Static Pressure inAq (Pa) 0.12 (30) 0.12 (30) 305 (8.6) 305 (8.6) 305 (8.6) 305 (8.6) Airflow Rate 280 (7.9)

  • Page 20

    SiUS12-928_B Indoor Unit 60 Hz, 208 - 230 V CDXS15LVJU CDXS18LVJU Model Cooling Heating Cooling Heating Rated Capacity 15 kBtu/h Class 18 kBtu/h Class External Static Pressure inAq (Pa) 0.16 (40) 0.16 (40) 424 (12.0) 424 (12.0) 424 (12.0) 424 (12.0) 388 (11.0) 388 (11.0) 388 (11.0)

  • Page 21: Outdoor Unit

    Outdoor Unit SiUS12-928_B 2. Outdoor Unit 60 Hz, 208 - 230 V 2MXS18GVJU Model Cooling Heating Casing Color Ivory White Type Hermetically Sealed Swing Type Compressor Model 2YC45EXD Motor Output 1,380 Model FVC50K Refrigerant Oil Charge oz (L) 26.5 (0.75) Type R-410A Refrigerant...

  • Page 22

    SiUS12-928_B Outdoor Unit 60 Hz, 208 - 230 V 3MXS24JVJU Model Cooling Heating Casing Color Ivory White Type Hermetically Sealed Swing Type Compressor Model 2YC63EXD Motor Output 1,920 Model FVC50K Refrigerant Oil Charge oz (L) 26.5 (0.75) Type R-410A Refrigerant Charge 6.61 (3.0) (kg)

  • Page 23

    Outdoor Unit SiUS12-928_B 60 Hz, 208 - 230 V 4MXS32GVJU Model Cooling Heating Casing Color Ivory White Type Hermetically Sealed Swing Type Compressor Model 2YC63EXD Motor Output 1,920 Model FVC50K Refrigerant Oil Charge oz (L) 26.5 (0.75) Type R-410A Refrigerant Charge 6.83 (3.1) (kg)

  • Page 24: Printed Circuit Board Connector Wiring Diagram, Part

    SiUS12-928_B Part 3 Printed Circuit Board Connector Wiring Diagram 1. Indoor Unit....................17 1.1 CTXS07JVJU, CTXS09/12HVJU, FTXS15/18HVJU........17 1.2 CTXS07LVJU, FTXS09/12LVJU ..............19 1.3 FTXS15/18LVJU ..................22 1.4 FDXS09/12DVJU ..................25 1.5 FDXS09/12LVJU, CDXS15/18LVJU ............27 2. Outdoor Unit....................29 2.1 2MXS18GVJU .................... 29 2.2 3MXS24JVJU, 4MXS32GVJU..............

  • Page 25: Ctxs07jvju, Ctxs09/12hvju, Ftxs15/18hvju, Indoor Unit

    Indoor Unit SiUS12-928_B 1. Indoor Unit CTXS07JVJU, CTXS09/12HVJU, FTXS15/18HVJU Connectors and PCB (1): Control PCB Other Parts 1) S1 Connector for fan motor 2) S6 Connector for swing motor (horizontal blades) 3) S8 Connector for swing motor (vertical blades) 4) S21 Connector for centralized control (HA) 5) S26 Connector for buzzer PCB...

  • Page 26

    SiUS12-928_B Indoor Unit PCB Detail PCB (1): Control PCB LED A 2P099167-1 PCB (2): Signal Receiver PCB PCB (3): Buzzer PCB 2P099167-1 RTH1 2P099167-1 PCB (4): Display PCB PCB (5): INTELLIGENT EYE Sensor PCB LED1 LED2 LED3 2P099167-1 3P099913-1 Printed Circuit Board Connector Wiring Diagram...

  • Page 27: Ctxs07lvju, Ftxs09/12lvju

    Indoor Unit SiUS12-928_B CTXS07LVJU, FTXS09/12LVJU Connectors and PCB (1): Control PCB Other Parts 1) S1 Connector for DC fan motor 2) S21 Connector for centralized control (HA) 3) S25 Connector for INTELLIGENT EYE sensor PCB 4) S32 Indoor heat exchanger thermistor 5) S41 Connector for swing motors 6) S46...

  • Page 28

    SiUS12-928_B Indoor Unit PCB Detail PCB (1): Control PCB LED A 2P206687-4 Printed Circuit Board Connector Wiring Diagram...

  • Page 29

    Indoor Unit SiUS12-928_B PCB (2): Signal Receiver PCB 3P210728-1 PCB (3): Display PCB RTH1 LED3 LED2 LED1 3P210728-1 PCB (4): INTELLIGENT EYE Sensor PCB 3EB86013-1 Printed Circuit Board Connector Wiring Diagram...

  • Page 30: Ftxs15/18lvju

    SiUS12-928_B Indoor Unit FTXS15/18LVJU Connectors and PCB (1): Control PCB Other Parts 1) S1 Connector for DC fan motor 2) S21 Connector for centralized control (HA) 3) S25 Connector for INTELLIGENT EYE sensor PCB 4) S32 Indoor heat exchanger thermistor 5) S41 Connector for swing motors 6) S46...

  • Page 31

    Indoor Unit SiUS12-928_B PCB Detail PCB (1): Control PCB (3.15A) LED A 2P227881-6 Printed Circuit Board Connector Wiring Diagram...

  • Page 32

    SiUS12-928_B Indoor Unit PCB (2): Signal Receiver PCB 3P224121-1 PCB (3): Display PCB RTH1 LED3 LED2 LED1 3P224121-1 PCB (4): INTELLIGENT EYE Sensor PCB 3P227885-1 Printed Circuit Board Connector Wiring Diagram...

  • Page 33: Fdxs09/12dvju

    Indoor Unit SiUS12-928_B FDXS09/12DVJU Connectors and PCB (1): Control PCB Other Parts 1) S1 Connector for fan motor 2) S7 Connector for fan motor (Hall IC) 3) S21 Connector for centralized control (HA) 4) S26 Connector for display PCB 5) S32 Connector for indoor heat exchanger thermistor 6) H1, H2, H3 Connector for terminal board...

  • Page 34

    SiUS12-928_B Indoor Unit PCB Detail PCB (1): Control PCB LED A 2P131149-1 PCB (2): Display PCB LED3 LED2 RTH1 LED1 2P084375-1 Printed Circuit Board Connector Wiring Diagram...

  • Page 35: Fdxs09/12lvju, Cdxs15/18lvju

    Indoor Unit SiUS12-928_B FDXS09/12LVJU, CDXS15/18LVJU Connectors and A1P: Control PCB Other Parts 1) S1 Connector for AC fan motor 2) S7 Connector for AC fan motor (Hall IC) 3) S21 Connector for centralized control (HA) 4) S26 Connector for display PCB 5) S32 Connector for indoor heat exchanger thermistor 6) H1, H2, H3...

  • Page 36

    SiUS12-928_B Indoor Unit PCB Detail A1P: Control PCB LED A 2P292535-1 A2P: Display PCB LED3 LED2 RTH1 2P084375-1 LED 1 does not function. Printed Circuit Board Connector Wiring Diagram...

  • Page 37

    Outdoor Unit SiUS12-928_B 2. Outdoor Unit 2MXS18GVJU Connectors and Main PCB Other Parts 1) S10 Connector for MID1 (indoor - outdoor transmission) 2) S15 Connector for COOL / HEAT mode lock  Refer to page 262 for detail. 3) S20 (white) Connector for electronic expansion valve coil A port 4) S21 (red) Connector for electronic expansion valve coil B port...

  • Page 38

    SiUS12-928_B Outdoor Unit MID2 (Inverter PCB) 1) S34, S72 Connector for main PCB 2) S70 Connector for outdoor fan motor 3) FU201 Fuse (3.15 A, 250 V) 4) W, V, U, N Connector for compressor 1) CN11, CN14 Connector for main PCB 2) L1, L2 Connector for reactor PCB Detail...

  • Page 39

    Outdoor Unit SiUS12-928_B MID1 3P080081-2 MID2 (Inverter PCB) FU201 (3.15A) 3P080085-1 CN14 CN11 3EB10032-4 Printed Circuit Board Connector Wiring Diagram...

  • Page 40

    SiUS12-928_B Outdoor Unit 3MXS24JVJU, 4MXS32GVJU Connectors and PCB (1): Main PCB Other Parts 1) S10 Connector for terminal board (indoor - outdoor transmission) 2) S15 Connector for COOL / HEAT mode lock  Refer to page 262 for detail. 3) S20 (white) Connector for electronic expansion valve coil A port 4) S21 (red) Connector for electronic expansion valve coil B port...

  • Page 41

    Outdoor Unit SiUS12-928_B PCB Detail PCB (1): Main PCB (brown) E1 E2 V100 (white) (blue) (blue) S101 2P209947-1 2P209947-2 PCB (2): Service Monitor PCB LED3 LED1 LED4 LED2 LED A S102 3P165332-1 Printed Circuit Board Connector Wiring Diagram...

  • Page 42: Function And Control, Part

    SiUS12-928_B Part 4 Function and Control 1. Main Functions..................35 1.1 Temperature Control .................. 35 1.2 Frequency Principle..................35 1.3 Airflow Direction Control (CTXS/FTXS Series) .......... 37 1.4 Fan Speed Control for Indoor Unit ............. 39 1.5 Program Dry Operation ................40 1.6 Automatic Operation...................

  • Page 43: Main Functions, Temperature Control, Frequency Principle

    Main Functions SiUS12-928_B 1. Main Functions Temperature Control Definitions of The definitions of temperatures are classified as following. Temperatures  Room temperature: temperature of lower part of the room  Set temperature: temperature set by remote controller  Room thermistor temperature: temperature detected by room temperature thermistor ...

  • Page 44

    SiUS12-928_B Main Functions Inverter Principle To regulate the capacity, a frequency control is needed. The inverter makes it possible to alter the rotation speed of the compressor. The following table explains the conversion principle: Phase Description The supplied AC power source is converted into the DC power source for the present. The DC power source is reconverted into the three phase AC power source with variable frequency.

  • Page 45: Airflow Direction Control (ctxs/ftxs Series)

    Main Functions SiUS12-928_B Frequency Limits The following functions regulate the minimum and maximum frequency: Frequency Functions  Four-way valve operation compensation. Refer to page 57.  Compressor protection function. Refer to page 58. High  Discharge pipe temperature control. Refer to page 58. ...

  • Page 46

    SiUS12-928_B Main Functions FTXS15/18LVJU Vertical Swing (up and down) Horizontal Swing (right and left) Cooling / Dry Heating 15˚ 15˚ 30˚ 25˚ 25˚ 40˚ 75˚ 75˚ 50˚ 60˚ 70˚ 70˚ (R9306) (R9304) (R9305) (R9303) 3-D Airflow Alternative repetition of vertical and horizontal swing motions enables uniform air-conditioning of the entire room.

  • Page 47: Fan Speed Control For Indoor Unit

    Main Functions SiUS12-928_B Fan Speed Control for Indoor Unit Outline Phase control and fan speed control contains 9 steps: LLL, LL, SL, L, ML, M, MH, H, and HH. The airflow rate can be automatically controlled depending on the difference between the room thermistor temperature and the target temperature.

  • Page 48: Program Dry Operation

    SiUS12-928_B Main Functions Note: 1. During POWERFUL operation, the fan rotates at H tap + 50 ~ 90 rpm. 2. The fan stops during defrost operation. COMFORT CTXS/FTXS-L Series  The fan speed is controlled automatically within the following steps. AIRFLOW <Cooling>...

  • Page 49: Automatic Operation

    Main Functions SiUS12-928_B Automatic Operation Outline Automatic Cooling / Heating Function When the automatic operation is selected with the remote controller, the microcomputer automatically determines the operation mode as cooling or heating according to the room temperature and the set temperature at start-up. The unit automatically switches the operation mode to maintain the room temperature at the set temperature.

  • Page 50: Thermostat Control

    SiUS12-928_B Main Functions Thermostat Control Thermostat control is based on the difference between the room thermistor temperature and the target temperature. Thermostat OFF Condition  The temperature difference is in the zone A. Thermostat ON Condition  The temperature difference returns to the zone C after being in the zone A. ...

  • Page 51

    Main Functions SiUS12-928_B CTXS/FTXS-L series Room thermistor temperature – target temperature 3.6°F (2.0°C) 2.7°F (1.5°C) 0.9°F (0.5°C) (R14451) CDXS/FDXS series Room thermistor temperature – target temperature 1.5°C (2.7°F) 1.8°F (1.0°C) 0.5°C (0.9°F) (R12402) Refer to “Temperature Control” on page 35 for detail. Function and Control...

  • Page 52: Night Set Mode

    SiUS12-928_B Main Functions NIGHT SET Mode Outline When the OFF timer is set, the NIGHT SET Mode is automatically activated. The NIGHT SET Mode keeps the airflow rate setting. Detail The NIGHT SET Mode continues operation at the target temperature for the first one hour, then automatically raises the target temperature slightly in the case of cooling, or lowers it slightly in the case of heating.

  • Page 53: Econo Operation

    Main Functions SiUS12-928_B ECONO Operation Outline CTXS/FTXS-L, CDXS/FDXS-L Series ECONO operation reduces the maximum operating current and the power consumption. This operation is particularly convenient for energy-saving-oriented users. It is also a major bonus for those whose breaker capacities do not allow the use of multiple electrical devices and air conditioners.

  • Page 54: Home Leave Operation

    SiUS12-928_B Main Functions 1.10 HOME LEAVE Operation Outline FDXS-D Series HOME LEAVE operation is a function that allows you to record your favorite set temperature and airflow rate. You can start your favorite operation mode simply by pressing the [HOME LEAVE] button on the remote controller.

  • Page 55: Intelligent Eye Operation (ctxs/ftxs Series)

    Main Functions SiUS12-928_B 1.11 INTELLIGENT EYE Operation (CTXS/FTXS Series) Outline This function detects the existence of humans in the room with a motion sensor (INTELLIGENT EYE) and reduces the capacity when there is nobody in the room in order to save electricity. Detail 1.

  • Page 56: Inverter Powerful Operation

    SiUS12-928_B Main Functions 1.12 Inverter POWERFUL Operation Outline In order to exploit the cooling and heating capacity to full extent, operate the air conditioner by increasing the indoor fan rotating speed and the compressor frequency. Detail When [POWERFUL] button is pressed, the fan speed and target temperature are converted to the following states for 20 minutes.

  • Page 57: Other Functions

    Main Functions SiUS12-928_B 1.13 Other Functions 1.13.1 Hot-Start Function In order to prevent the cold air blast that normally comes when heating operation is started, the temperature of the indoor heat exchanger is detected, and the airflow is either stopped or made very weak thereby carrying out comfortable heating of the room.

  • Page 58

    SiUS12-928_B Main Functions 1.13.6 Auto-restart Function If a power failure (including one for just a moment) occurs during the operation, the operation restarts automatically when the power is restored in the same condition as before the power failure. Note: It takes 3 minutes to restart the operation because the 3-minute standby function is activated. 1.13.7 WEEKLY TIMER Operation CTXS/FTXS-L Series Up to 4 timer settings can be saved for each day of the week (up to 28 settings in total).

  • Page 59: Function Of Thermistor

    Function of Thermistor SiUS12-928_B 2. Function of Thermistor <2MXS18GVJU> Outdoor electronic expansion valve Receiver Defrost solenoid valve Four way valve Compressor (R17358) <3MXS24JVJU> Outdoor electronic expansion valve Four way valve Compressor (R17359) <4MXS32GVJU> Outdoor electronic expansion valve Four way valve Compressor (R17360) Function and Control...

  • Page 60

    SiUS12-928_B Function of Thermistor (1) Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling the target discharge pipe temperature. The system sets the target discharge pipe temperature according to the outdoor Exchanger and indoor heat exchanger temperature, and controls the outdoor electronic expansion valve Thermistor opening so that the target discharge pipe temperature can be obtained.

  • Page 61

    Function of Thermistor SiUS12-928_B (5) Liquid Pipe 1. When only one indoor unit is in heating, the liquid pipe thermistor is used for subcooling control. The actual subcool is calculated with the liquid pipe temperature and the maximum indoor heat Thermistor exchanger temperature.

  • Page 62: Control Specification, Mode Hierarchy

    SiUS12-928_B Control Specification 3. Control Specification Mode Hierarchy Outline Air conditioner control has normal operation mode, forced operation mode, and power transistor test mode for installation and servicing. Detail Air conditioner control mode Forced operation mode Forced cooling operation (for pump down operation) Forced heating operation Wiring error check operation Power transistor test mode...

  • Page 63: Frequency Control

    Control Specification SiUS12-928_B Frequency Control Outline Frequency that corresponds to each room’s capacity is determined according to the difference between the target temperature and the temperature of each room. The function is explained as follows. 1. How to determine frequency 2.

  • Page 64

    SiUS12-928_B Control Specification Indoor Frequency Command (D signal) The difference between a room thermistor temperature and the target temperature is taken as the “D signal” and is used for frequency command. D D D D Temperature Temperature Temperature Temperature difference signal difference signal...

  • Page 65: Controls At Mode Changing / Start-up

    Control Specification SiUS12-928_B Controls at Mode Changing / Start-up 3.3.1 Preheating Operation Outline The inverter operation in open phase starts with the conditions of the outdoor temperature and the preheating command from the indoor unit. Detail ON Condition  When the outdoor temperature is below 50.9°F (10.5°C), the inverter operation in open phase starts.

  • Page 66: Discharge Pipe Temperature Control

    SiUS12-928_B Control Specification 3.3.5 Compressor Protection Function When turning the compressor from OFF to ON, the upper limit of frequency is set as follows. (The function is not used when defrosting.) (Hz) Frequency (sec.) Time (R13528) A (Hz) B (Hz) C (Hz) D (seconds) E (seconds)

  • Page 67: Input Current Control, Freeze-up Protection Control

    Control Specification SiUS12-928_B Input Current Control Outline An input current is detected by the CT while the compressor is running, and the frequency upper limit is set from the input current. In case of heat pump models, this control which is the upper limit control of the frequency takes priority over the lower limit control of four way valve operation compensation.

  • Page 68: Heating Peak-cut Control

    SiUS12-928_B Control Specification Heating Peak-cut Control Outline During heating operation, the indoor heat exchanger temperature determines the frequency upper limit to prevent abnormal high pressure.  The operating frequency is judged with the indoor heat exchanger temperature 2 minutes after Detail the operation starts and seconds after the number of operation room is changed.

  • Page 69: Outdoor Fan Control, Liquid Compression Protection Function

    Control Specification SiUS12-928_B Outdoor Fan Control 1. Fan ON control to cool down the electrical box The outdoor fan is turned ON when the electrical box temperature is high while the compressor is OFF. 2. Fan OFF control during defrosting The outdoor fan is turned OFF while defrosting.

  • Page 70: Defrost Control

    SiUS12-928_B Control Specification 3.10 Defrost Control Outline Defrosting is carried out by the cooling cycle (reverse cycle). The defrosting time or outdoor heat exchanger temperature must be more than a certain value to finish. Detail Conditions for Starting Defrost  The starting conditions are determined with the outdoor temperature and the outdoor heat exchanger temperature.

  • Page 71: Low Hz High Pressure Limit, Outdoor Electronic Expansion Valve Control

    Control Specification SiUS12-928_B 3.11 Low Hz High Pressure Limit Outline The system controls the upper limit of the frequency to prevent abnormal high pressure while the frequency is low. Control is carried out according to three zones. Detail Dropping zone Reset zone Keep zone...

  • Page 72

    SiUS12-928_B Control Specification Detail The followings are the examples of outdoor electronic expansion valve control which function in each operation mode. Operation pattern  : Holding Functions — : No Functions When power is turned on Fully closed when power is turned on —...

  • Page 73

    Control Specification SiUS12-928_B 3.12.1 Fully Closing with Power on The outdoor electronic expansion valve is initialized when the power is turned on. The opening position is set and the pressure equalization is developed. 3.12.2 Pressure Equalizing Control When the compressor is stopped, the pressure equalizing control is activated. The outdoor electronic expansion valve opens, and develops the pressure equalization.

  • Page 74

    SiUS12-928_B Control Specification 3.12.8 Control for Disconnection of the Discharge Pipe Thermistor Outline The disconnection of the discharge pipe thermistor is detected by comparing the discharge pipe temperature with the condensing temperature. If the discharge pipe thermistor is disconnected, the outdoor electronic expansion valve opens according to the outdoor temperature and the operation frequency, operates for a specified time, and then stops.

  • Page 75

    Control Specification SiUS12-928_B 3.12.11Target Discharge Pipe Temperature Control The target discharge pipe temperature is obtained from the indoor and outdoor heat exchanger temperature, and the outdoor electronic expansion valve opening is adjusted so that the actual discharge pipe temperature becomes close to the target discharge pipe temperature. (Indirect SH (superheating) control using the discharge pipe temperature) The target discharge pipe temperature is set as to become the...

  • Page 76: Malfunctions

    SiUS12-928_B Control Specification 3.13 Malfunctions 3.13.1 Sensor Malfunction Detection Sensor malfunction may occur either in the thermistor or current transformer (CT) system. Relating to Thermistor Malfunction 1. Outdoor heat exchanger thermistor 2. Discharge pipe thermistor 3. Radiation fin thermistor 4. Gas pipe thermistor for each room 5.

  • Page 77

    Control Specification SiUS12-928_B 3.13.4 Anti-icing Function If the indoor heat exchanger’s temperature drops below the specified temperature during cooling, fully-closed operation the outdoor electonic expansion valve will open and the is carried out in the room. After this, if an abnormal freezing occurs for longer than a specified time, the system will shut down.

  • Page 78: Operation Manual

    SiUS12-928_B Part 5 Operation Manual 1. System Configuration................71 2. CTXS-J, CTXS-H, FTXS-H Series ............72 2.1 Remote Controller ..................72 2.2 AUTO · DRY · COOL · HEAT · FAN Operation ......... 74 2.3 Adjusting the Airflow Direction..............76 2.4 INTELLIGENT EYE Operation ..............78 2.5 POWERFUL Operation ................

  • Page 79: System Configuration

    System Configuration SiUS12-928_B 1. System Configuration After installation and trial operation of the room air conditioner are completed, the air conditioner should be handled and operated as described in the following pages. Every user should be informed on the correct method of operation and how to check if it can cool (or heat) well, and how to use it efficiently.

  • Page 80: Ctxs-j, Ctxs-h, Ftxs-h Series, Part, Remote Controller

    SiUS12-928_B CTXS-J, CTXS-H, FTXS-H Series 2. CTXS-J, CTXS-H, FTXS-H Series Remote Controller Name of Parts Remote Controller: ARC452A9 Signal transmitter Display (LCD) Receiver • Displays the current settings. (In this illustration, each section is shown with its displays on for the •...

  • Page 81

    CTXS-J, CTXS-H, FTXS-H Series SiUS12-928_B Open the front cover MODE selector button HOME LEAVE button • Selects the operation mode. • HOME LEAVE operation. (AUTO/DRY/COOL/HEAT/ Page 18 FAN) Page 10 SWING button • Adjusting the airflow direction. Page 12 QUIET button •...

  • Page 82: Auto · Dry · Cool · Heat · Fan Operation

    SiUS12-928_B CTXS-J, CTXS-H, FTXS-H Series AUTO · DRY · COOL · HEAT · FAN Operation AUTO · DRY · COOL · HEAT · FAN Operation The air conditioner operates with the operation mode of your choice. From the next time on, the air conditioner will operate with the same operation mode. ...

  • Page 83

    CTXS-J, CTXS-H, FTXS-H Series SiUS12-928_B  To change the airflow rate setting Press DRY operation AUTO or COOL or HEAT or FAN operation 5 levels of airflow rate setting from The airflow rate setting is not variable. “ ” to “ ”...

  • Page 84: Adjusting The Airflow Direction

    SiUS12-928_B CTXS-J, CTXS-H, FTXS-H Series Adjusting the Airflow Direction Adjusting the Airflow Direction You can adjust the airflow direction to increase your comfort. Adjusting the upper and lower airflow direction  To adjust the louvers (horizontal blades) Press • “ ”...

  • Page 85

    CTXS-J, CTXS-H, FTXS-H Series SiUS12-928_B  To start 3-D airflow 1. 3. Press the and the the “ ” and “ ” display will light up and the louvers and fins will move in turn.  To cancel 3-D airflow 2.

  • Page 86: Intelligent Eye Operation

    SiUS12-928_B CTXS-J, CTXS-H, FTXS-H Series INTELLIGENT EYE Operation INTELLIGENT EYE Operation “INTELLIGENT EYE” is the infrared sensor which detects the human movement.  To start INTELLIGENT EYE operation Press • “ ” is displayed on the LCD.  To cancel INTELLIGENT EYE operation Press again.

  • Page 87

    CTXS-J, CTXS-H, FTXS-H Series SiUS12-928_B “INTELLIGENT EYE” is useful for energy saving  Energy saving operation • Change the temperature –3.6°F (–2°C) in HEAT / +3.6°F (+2°C) in COOL / +1.8°F (+1°C) in DRY operation from set temperature. • Decrease the airflow rate slightly in FAN operation only. •...

  • Page 88: Powerful Operation

    SiUS12-928_B CTXS-J, CTXS-H, FTXS-H Series POWERFUL Operation POWERFUL Operation POWERFUL operation quickly maximizes the cooling (heating) effect in any operation mode. You can get the maximum capacity.  To start POWERFUL operation Press during operation. • POWERFUL operation ends in 20 minutes. Then the system automatically operates again with the previous settings which were used before POWERFUL operation.

  • Page 89: Outdoor Unit Quiet Operation

    CTXS-J, CTXS-H, FTXS-H Series SiUS12-928_B OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET operation lowers the sound level of the outdoor unit by changing the frequency and fan speed on the outdoor unit. This function is convenient during night. ...

  • Page 90

    SiUS12-928_B CTXS-J, CTXS-H, FTXS-H Series HOME LEAVE Operation HOME LEAVE Operation HOME LEAVE operation is a function which allows you to record your preferred temperature and airflow rate settings.  To start HOME LEAVE operation Press • “ ” is displayed on the LCD. •...

  • Page 91

    CTXS-J, CTXS-H, FTXS-H Series SiUS12-928_B  What ’ s the HOME LEAVE operation? Is there a set temperature and airflow rate which is most comfortable, a set temperature and airflow rate which you use the most? HOME LEAVE operation is a function that allows you to record your favorite set temperature and airflow rate. You can start your favorite operation mode simply by pressing on the remote controller.

  • Page 92: Timer Operation

    SiUS12-928_B CTXS-J, CTXS-H, FTXS-H Series TIMER Operation TIMER Operation Timer functions are useful for automatically switching the air conditioner on or off at night or in the morning. You can also use OFF TIMER and ON TIMER in combination.  To use OFF TIMER operation •...

  • Page 93

    CTXS-J, CTXS-H, FTXS-H Series SiUS12-928_B  To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time. Press “ ” is displayed. “ ” blinks. Press until the time setting reaches the point you like.

  • Page 94: Note For Multi System

    SiUS12-928_B CTXS-J, CTXS-H, FTXS-H Series Note for Multi System Note for Multi System What is a multi system? This system has one outdoor unit connected to multiple indoor units.  Selecting the operation mode room Outdoor unit 1. With the priority room setting present but inactive or not present.

  • Page 95

    CTXS-J, CTXS-H, FTXS-H Series SiUS12-928_B  OUTDOOR UNIT QUIET operation Page 17 1. With the priority room setting present but inactive or not present. When using the OUTDOOR UNIT QUIET operation feature with the multi system, set all indoor units to OUTDOOR UNIT QUIET operation using their remote controllers.

  • Page 96: Ctxs-l, Ftxs-l Series, Remote Controller

    SiUS12-928_B CTXS-L, FTXS-L Series 3. CTXS-L, FTXS-L Series Remote Controller Names of Parts Remote Controller Signal transmitter Display (LCD) • Displays the current settings. Receiver (In this illustration, each section is shown with all its displays on for the purpose of explanation.) •...

  • Page 97

    CTXS-L, FTXS-L Series SiUS12-928_B  Open the front cover MODE selector button ECONO button • Selects the operation mode. • ECONO operation. Page 19 (AUTO/DRY/COOL/HEAT/ Page 11 FAN) SWING button • Adjusting the airflow direction. Page 13 COMFORT/SENSOR QUIET button button •...

  • Page 98

    SiUS12-928_B CTXS-L, FTXS-L Series AUTO · DRY · COOL · HEAT · FAN Operation AUTO · DRY · COOL · HEAT · FAN Operation The air conditioner operates with the operation mode of your choice. From the next time on, the air conditioner will operate with the same operation mode. ...

  • Page 99

    CTXS-L, FTXS-L Series SiUS12-928_B  To change the temperature setting Press • The displayed items on the LCD will change whenever either one of the buttons is pressed. COOL operation HEAT operation AUTO operation DRY or FAN operation 64-90˚F 50-86˚F 64-86˚F (18-32˚C) (10-30˚C)

  • Page 100: Adjusting The Airflow Direction And Rate

    SiUS12-928_B CTXS-L, FTXS-L Series Adjusting the Airflow Direction and Rate Adjusting the Airflow Direction and Rate You can adjust the airflow direction to increase your comfort.  To start auto swing Upper and lower airflow direction Press • “ ” is displayed on the LCD. •...

  • Page 101

    CTXS-L, FTXS-L Series SiUS12-928_B CTXS07LVJU, FTXS09/12LVJU  To adjust the airflow rate setting Press • Each pressing of advances the airflow rate setting in sequence. Auto Indoor unit quiet Middle low High Middle high Middle • When the airflow is set to “ ”, indoor unit quiet operation will start and the noise from the unit will become quieter.

  • Page 102

    SiUS12-928_B CTXS-L, FTXS-L Series FTXS15/18LVJU  To adjust the airflow rate setting Press • Each pressing of advances the airflow rate setting in sequence. Auto Indoor unit quiet Middle low High Middle high Middle • When the airflow is set to “ ”, indoor unit quiet operation will start and the noise from the unit will become quieter.

  • Page 103: Comfort Airflow / Intelligent Eye Operation

    CTXS-L, FTXS-L Series SiUS12-928_B COMFORT AIRFLOW / INTELLIGENT EYE Operation COMFORT AIRFLOW / INTELLIGENT EYE Operation  COMFORT AIRFLOW operation The flow of air will be in the upward direction while in COOL operation and in the downward direction while in HEAT operation, providing comfortable cool or warm air that does not come in direct contact with people.

  • Page 104

    SiUS12-928_B CTXS-L, FTXS-L Series  To start operation Press and select the desired mode. • Each time the is pressed a different setting option is displayed on the LCD. • The INTELLIGENT EYE lamp lights green. Display • By selecting “ ”...

  • Page 105

    CTXS-L, FTXS-L Series SiUS12-928_B POWERFUL Operation POWERFUL Operation POWERFUL operation quickly maximizes the cooling (heating) effect in any operation mode. You can get the maximum capacity.  To start POWERFUL operation Press during operation. • POWERFUL operation ends in 20 minutes. Then the system automatically operates again with the previous settings which were used before POWERFUL operation.

  • Page 106

    SiUS12-928_B CTXS-L, FTXS-L Series OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET operation lowers the noise level of the outdoor unit by changing the frequency and fan speed on the outdoor unit. This function is convenient during the night. ...

  • Page 107

    CTXS-L, FTXS-L Series SiUS12-928_B ECONO Operation ECONO Operation ECONO operation is a function which enables efficient operation by limiting the maximum power consumption value. This function is useful for cases in which attention should be paid to ensure a circuit breaker will not trip when the product runs alongside other appliances. ...

  • Page 108: Off Timer Operation

    SiUS12-928_B CTXS-L, FTXS-L Series OFF TIMER Operation OFF TIMER Operation Timer functions are useful for automatically switching the air conditioner on or off at night or in the morning. You can also use OFF TIMER and ON TIMER in combination. ...

  • Page 109: On Timer Operation

    CTXS-L, FTXS-L Series SiUS12-928_B ON TIMER Operation ON TIMER Operation  To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time. Press “ ” is displayed on the LCD. “...

  • Page 110: Weekly Timer Operation

    SiUS12-928_B CTXS-L, FTXS-L Series 3.10 WEEKLY TIMER Operation WEEKLY TIMER Operation Up to 4 timer settings can be saved for each day of the week. It is convenient if the WEEKLY TIMER is set according to the family’s life style. ...

  • Page 111

    CTXS-L, FTXS-L Series SiUS12-928_B WEEKLY TIMER Operation  To use WEEKLY TIMER operation Setting mode • Make sure the day of the week and time are set. If not, set the day of the week and time. Program 1 Program 2 Program 3 Program 4 [Monday]...

  • Page 112

    SiUS12-928_B CTXS-L, FTXS-L Series Press to select the desired time. • The time can be set between 0:00 and 23:50 in 10 minute intervals. • To return to the ON/OFF TIMER mode setting, press • Go to STEP when setting the OFF TIMER. Press •...

  • Page 113

    CTXS-L, FTXS-L Series SiUS12-928_B WEEKLY TIMER Operation Copy mode • A reservation made once can be copied to another day of the week. The whole reservation of the selected day of the week will be copied. Program 1 Program 2 Program 3 Program 4 [Monday]...

  • Page 114

    SiUS12-928_B CTXS-L, FTXS-L Series  Confirming a reservation • The reservation can be confirmed. Setting Displays Normal display Confirmation display Press • The day of the week and the reservation number of current day will be displayed. Press to select the day of the week and the reservation number to be confirmed.

  • Page 115

    CTXS-L, FTXS-L Series SiUS12-928_B WEEKLY TIMER Operation  To delete reservations The individual reservation Press • The day of the week and the reservation number will be displayed. Press to select the day of the week and the reservation number to be deleted. Press •...

  • Page 116

    SiUS12-928_B CTXS-L, FTXS-L Series 3.11 Note for Multi System Note for Multi System Multi system has one outdoor unit connected to multiple indoor units.  Selecting the operation mode With the priority room setting present but A room B room inactive or not present.

  • Page 117

    CTXS-L, FTXS-L Series SiUS12-928_B Note for Multi System  COOL / HEAT mode lock The COOL / HEAT mode lock requires initial programming during installation. Please consult your authorized dealer for assistance. The COOL / HEAT mode lock sets the unit forcibly to either COOL or HEAT operation. This function is convenient when you wish to set all indoor units connected to the multi system to the same operation mode.

  • Page 118: Quick Reference

    SiUS12-928_B CTXS-L, FTXS-L Series 3.12 Quick Reference Quick Reference C: 3P297290-1 C: 3P297290-2 Operation Manual...

  • Page 119: Fdxs-d Series, Remote Controller

    FDXS-D Series SiUS12-928_B 4. FDXS-D Series Remote Controller  Remote Controller 〈 ARC433B63 〉 1. Signal transmitter: 7. MODE selector button: • It sends signals to the indoor unit. • It selects the operation mode. (AUTO/DRY/COOL/HEAT/FAN) (page 10.) 2. Display: 8.

  • Page 120

    SiUS12-928_B FDXS-D Series AUTO · DRY · COOL · HEAT · FAN Operation AUTO · DRY · COOL · HEAT · FAN Operation The air conditioner operates with the operation mode of your choice. From the next time on, the air conditioner will operate with the same operation mode.

  • Page 121

    FDXS-D Series SiUS12-928_B  To change the air flow rate setting 5. Press “FAN setting button”. DRY mode AUTO or COOL or HEAT or FAN mode Five levels of air flow rate setting from “ ” to “ ” plus “...

  • Page 122

    SiUS12-928_B FDXS-D Series POWERFUL Operation POWERFUL Operation POWERFUL operation quickly maximizes the cooling (heating) effect in any operation mode. You can get the maximum capacity. To start POWERFUL operation 1. Press “POWERFUL button”. • POWERFUL operation ends in 20 minutes. Then the system automatically operates again with the settings which were used before POWERFUL operation.

  • Page 123

    FDXS-D Series SiUS12-928_B OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET operation lowers the sound level of the outdoor unit by changing the frequency and fan speed on the outdoor unit. This function is convenient during night. ...

  • Page 124

    SiUS12-928_B FDXS-D Series HOME LEAVE Operation HOME LEAVE Operation HOME LEAVE operation is a function which allows you to record your preferred temperature and air flow rate settings. To start HOME LEAVE operation 1. Press “HOME LEAVE button”. • “ ”...

  • Page 125

    FDXS-D Series SiUS12-928_B  What’s the HOME LEAVE operation? Is there a set temperature and air flow rate which is most comfortable, a set temperature and air flow rate which you use the most? HOME LEAVE operation is a function that allows you to record your favorite set temperature and air flow rate.

  • Page 126

    SiUS12-928_B FDXS-D Series TIMER Operation TIMER Operation Timer functions are useful for automatically switching the air conditioner on or off at night or in the morning. You can also use OFF TIMER and ON TIMER in combination. To use OFF TIMER operation •...

  • Page 127

    FDXS-D Series SiUS12-928_B  To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time. 1. Press “ON TIMER button”. is displayed. blinks. 2. Press “TIMER Setting button” until the time setting reaches the point you like.

  • Page 128: Cdxs-l, Fdxs-l Series, Remote Controller

    SiUS12-928_B CDXS-L, FDXS-L Series 5. CDXS-L, FDXS-L Series Remote Controller Names of Parts Remote Controller Signal transmitter Display (LCD) • Displays the current settings. Receiver (In this illustration, each section is shown with all its displays on for the purpose of explanation.) •...

  • Page 129

    CDXS-L, FDXS-L Series SiUS12-928_B  Open the front cover MODE selector button • Selects the operation mode. (AUTO/DRY/COOL/HEAT/ FAN) Page 11 QUIET button ECONO button • OUTDOOR UNIT QUIET • ECONO operation. Page 16 operation. Page 15 ON TIMER button OFF TIMER button Page 18 Page 17...

  • Page 130

    SiUS12-928_B CDXS-L, FDXS-L Series AUTO · DRY · COOL · HEAT · FAN Operation AUTO · DRY · COOL · HEAT · FAN Operation The air conditioner operates with the operation mode of your choice. From the next time on, the air conditioner will operate with the same operation mode.

  • Page 131

    CDXS-L, FDXS-L Series SiUS12-928_B  To change the temperature setting Press • The displayed items on the LCD will change whenever either one of the buttons is pressed. COOL operation HEAT operation AUTO operation DRY or FAN operation 64-90˚F 50-86˚F 64-86˚F (18-32˚C) (10-30˚C)

  • Page 132: Adjusting The Airflow Rate

    SiUS12-928_B CDXS-L, FDXS-L Series Adjusting the Airflow Rate Adjusting the Airflow Rate  To adjust the airflow rate setting Press • Each pressing of advances the airflow rate setting in sequence. Auto Indoor unit quiet Middle low High Middle high Middle •...

  • Page 133

    CDXS-L, FDXS-L Series SiUS12-928_B POWERFUL Operation POWERFUL Operation POWERFUL operation quickly maximizes the cooling (heating) effect in any operation mode. You can get the maximum capacity.  To start POWERFUL operation Press during operation. • POWERFUL operation ends in 20 minutes. Then the system automatically operates again with the previous settings which were used before POWERFUL operation.

  • Page 134

    SiUS12-928_B CDXS-L, FDXS-L Series OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET operation lowers the noise level of the outdoor unit by changing the frequency and fan speed on the outdoor unit. This function is convenient during night. ...

  • Page 135

    CDXS-L, FDXS-L Series SiUS12-928_B ECONO Operation ECONO Operation ECONO operation is a function which enables efficient operation by limiting the maximum power consumption value. This function is useful for cases in which attention should be paid to ensure a circuit breaker will not trip when the product runs alongside other appliances. ...

  • Page 136

    SiUS12-928_B CDXS-L, FDXS-L Series OFF TIMER Operation OFF TIMER Operation Timer functions are useful for automatically switching the air conditioner on or off at night or in the morning. You can also use OFF TIMER and ON TIMER in combination. ...

  • Page 137

    CDXS-L, FDXS-L Series SiUS12-928_B ON TIMER Operation ON TIMER Operation  To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time. Press “ ” is displayed on the LCD. “...

  • Page 138

    SiUS12-928_B CDXS-L, FDXS-L Series Note for Multi System Note for Multi System Multi system has one outdoor unit connected to multiple indoor units.  Selecting the operation mode With the priority room setting present but A room B room inactive or not present. When more than one indoor unit is operating, priority is given to the first unit that was turned on.

  • Page 139

    CDXS-L, FDXS-L Series SiUS12-928_B  COOL/HEAT mode lock The COOL/HEAT mode lock requires initial programming during installation. Please consult your authorized dealer for assistance. The COOL/HEAT mode lock sets the unit forcibly to either COOL or HEAT operation. This function is convenient when you wish to set all indoor units connected to the multi system to the same operation mode.

  • Page 140

    SiUS12-928_B CDXS-L, FDXS-L Series 5.10 Quick Reference Quick Reference C: 3P297290-3 Operation Manual...

  • Page 141: Service Diagnosis

    SiUS12-928_B Part 6 Service Diagnosis 1. Troubleshooting with LED ...............135 1.1 Indoor Unit....................135 1.2 Outdoor Unit ..................... 136 2. Problem Symptoms and Measures ............137 3. Service Check Function ................138 3.1 ARC452 Series Remote Controller ............138 3.2 ARC433 Series Remote Controller ............141 4.

  • Page 142

    SiUS12-928_B 7.2 Fan Motor Connector Check ..............192 7.3 Hall IC Check ................... 192 7.4 Power Supply Waveform Check............... 193 7.5 Outdoor Electronic Expansion Valve Check..........194 7.6 Four Way Valve Performance Check ............195 7.7 Inverter Unit Refrigerant System Check........... 195 7.8 “Inverter Checker”...

  • Page 143: Troubleshooting With Led, Indoor Unit

    Troubleshooting with LED SiUS12-928_B 1. Troubleshooting with LED Indoor Unit Operation Lamp The operation lamp blinks when any of the following errors is detected. 1. When a protection device of the indoor or outdoor unit is activated, or when the thermistor malfunctions.

  • Page 144

    SiUS12-928_B Troubleshooting with LED Outdoor Unit Service monitor PCB LED A 2MXS18GVJU LED 1 LED 2 LED 3 LED 4 3MXS24JVJU (R17364) 4MXS32GVJU The outdoor unit has a green LED (LED A) and red LEDs (LED 1 ~ LED 4) on the PCB. When the microcomputer works in order, the LED A blinks, and when the system is in normal condition, the red LEDs are OFF.

  • Page 145: Problem Symptoms And Measures

    Problem Symptoms and Measures SiUS12-928_B 2. Problem Symptoms and Measures Problem Symptom Check Item Details of Measure Reference Page None of the units operates. Check the power supply. Check if the rated voltage is supplied. — Check the types of the indoor units. Check if the indoor unit type is compatible with —...

  • Page 146: Service Check Function, Arc452 Series Remote Controller

    SiUS12-928_B Service Check Function 3. Service Check Function ARC452 Series Remote Controller 1. When the timer cancel button is held down for 5 seconds, 00 is displayed on the temperature Check Method 1 display screen. Timer cancel button < ARC452 Series > (R14460) 2.

  • Page 147

    Service Check Function SiUS12-928_B  , TEMP  , MODE) at the same time to enter the diagnosis mode. Check Method 2 1. Press the 3 buttons (TEMP (R14550) The left-side number blinks. (R9430)  or  button and change the number until you hear the two consecutive 2.

  • Page 148

    SiUS12-928_B Service Check Function  or  button  and change the number until you hear the long beep. 5. Press the [TEMP] (R14547) 6. Diagnose by the sound. beep : The left-side number does not correspond with the error code. two consecutive beeps : The left-side number corresponds with the error code but the right-side number does not.

  • Page 149: Arc433 Series Remote Controller

    Service Check Function SiUS12-928_B ARC433 Series Remote Controller 1. When the timer cancel button is held down for 5 seconds, 00 is displayed on the temperature Check Method 1 display screen. Timer cancel button < ARC433 Series > (R14555) 2. Press the timer cancel button repeatedly until a long beep sounds. ...

  • Page 150

    SiUS12-928_B Service Check Function Check Method 2 1. Press the center of the [TEMP] button and the [MODE] button at the same time to enter the diagnosis mode. (R4272) The left-side number blinks. (R14967)  or  button and change the number until you hear the two consecutive 2.

  • Page 151

    Service Check Function SiUS12-928_B  or  button  and change the number until you hear the long beep. 5. Press the [TEMP] (R4277) 6. Diagnose by the sound. beep : The left-side number does not correspond with the error code. two consecutive beeps : The left-side number corresponds with the error code but the right- side number does not.

  • Page 152: Code Indication On Remote Controller, Indoor Unit

    SiUS12-928_B Code Indication on Remote Controller 4. Code Indication on Remote Controller Indoor Unit Error Codes Description Reference Page Normal condition — Indoor unit PCB abnormality Freeze-up protection control or heating peak-cut control DC motor (CTXS/FTXS series) Fan motor or related abnormality AC motor (CDXS/FDXS series) Indoor heat exchanger thermistor or related abnormality Room temperature thermistor or related abnormality...

  • Page 153

    Code Indication on Remote Controller SiUS12-928_B Outdoor Unit : ON, : OFF, : Blinks Green : Blinks in normal condition Red : OFF in normal condition Outdoor Unit LED Indication Error Codes Description Reference Page Green 3 00 Normal condition —...

  • Page 154: Troubleshooting For Indoor Unit, Indoor Unit Pcb Abnormality

    SiUS12-928_B Troubleshooting for Indoor Unit 5. Troubleshooting for Indoor Unit Indoor Unit PCB Abnormality Remote Controller Display Method of The system checks if the circuit works properly within the microcomputer of the indoor unit. Malfunction Detection Malfunction The system cannot set the internal settings. Decision Conditions ...

  • Page 155

    Troubleshooting for Indoor Unit SiUS12-928_B Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the combination of the indoor and outdoor unit. Match the compatible models. ∗ To secure the connection, Check the connection of once disconnect the connector connectors (See Note.).

  • Page 156: Freeze-up Protection Control Or Heating Peak-cut Control

    SiUS12-928_B Troubleshooting for Indoor Unit Freeze-up Protection Control or Heating Peak-cut Control Remote Controller Display  Freeze-up protection control Method of Malfunction During cooling operation, the freeze-up protection control (operation halt) is activated according to the temperature detected by the indoor heat exchanger thermistor. Detection ...

  • Page 157

    Troubleshooting for Indoor Unit SiUS12-928_B Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Check the air passage. Refer to P.191 Is there any short circuit? Provide sufficient air passage. Check the air filter.

  • Page 158: Fan Motor Or Related Abnormality

    SiUS12-928_B Troubleshooting for Indoor Unit Fan Motor or Related Abnormality 5.3.1 DC Motor (CTXS/FTXS Series) Remote Controller Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine Malfunction abnormal fan motor operation. Detection Malfunction The detected rotation speed does not reach the demanded rotation speed of the target tap, and is...

  • Page 159

    Troubleshooting for Indoor Unit SiUS12-928_B Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.02 Turn off the power supply Refer to P.192 and rotate the fan by hand.

  • Page 160

    SiUS12-928_B Troubleshooting for Indoor Unit 5.3.2 AC Motor (CDXS/FDXS Series) Remote Controller Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine Malfunction abnormal fan motor operation. Detection Malfunction The detected rotation speed does not reach the demanded rotation speed of the target tap, and is less than 50% of the maximum fan motor rotation speed.

  • Page 161: Thermistor Or Related Abnormality (indoor Unit)

    Troubleshooting for Indoor Unit SiUS12-928_B Thermistor or Related Abnormality (Indoor Unit) C4, C9 Remote Controller Display Method of The temperatures detected by the thermistors are used to determine thermistor errors. Malfunction Detection Malfunction The thermistor input is more than 4.96 V or less than 0.04 V during compressor operation. Decision Conditions ...

  • Page 162: Signal Transmission Error (between Indoor Unit And Outdoor Unit)

    SiUS12-928_B Troubleshooting for Indoor Unit Signal Transmission Error (between Indoor Unit and Outdoor Unit) Remote Controller Display Method of The data received from the outdoor unit in indoor unit-outdoor unit signal transmission is checked Malfunction whether it is normal. Detection Malfunction The data sent from the outdoor unit cannot be received normally, or the content of the data is abnormal.

  • Page 163: Unspecified Voltage (between Indoor Unit And Outdoor Unit)

    Troubleshooting for Indoor Unit SiUS12-928_B Unspecified Voltage (between Indoor Unit and Outdoor Unit) Remote Controller Display Method of The supply power is detected for its requirements (different from pair type and multi type) by the indoor / outdoor transmission signal. Malfunction Detection Malfunction...

  • Page 164: Troubleshooting For Outdoor Unit, Refrigerant Shortage

    SiUS12-928_B Troubleshooting for Outdoor Unit 6. Troubleshooting for Outdoor Unit Refrigerant Shortage Remote Controller Display Outdoor Unit LED Display Method of Refrigerant shortage detection I : Malfunction Refrigerant shortage is detected by checking the input current value and the compressor output frequency.

  • Page 165

    Troubleshooting for Outdoor Unit SiUS12-928_B Troubleshooting 18 class Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Refer to P.191 Any thermistor Replace the thermistor(s) disconnected? ∗ Discharge pipe thermistor position.

  • Page 166

    SiUS12-928_B Troubleshooting for Outdoor Unit Troubleshooting 24/32 class Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Refer to P.191 Any thermistor Replace the thermistor(s) disconnected? ∗ Discharge pipe thermistor position.

  • Page 167: Low-voltage Detection Or Over-voltage Detection

    Troubleshooting for Outdoor Unit SiUS12-928_B Low-voltage Detection or Over-voltage Detection Remote Controller Display Outdoor Unit LED Display Method of  Indoor Unit Malfunction The zero-cross detection of the power supply is evaluated by the indoor unit PCB. Detection  Outdoor Unit Low-voltage detection: An abnormal voltage drop is detected by the DC voltage detection circuit.

  • Page 168

    SiUS12-928_B Troubleshooting for Outdoor Unit Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the power supply voltage. Voltage as rated? Correct the power supply. Check the connection of the compressor harness.

  • Page 169: Signal Transmission Error (on Outdoor Unit Pcb) (24/32 Class Only)

    Troubleshooting for Outdoor Unit SiUS12-928_B Signal Transmission Error (on Outdoor Unit PCB) (24/32 Class Only) Remote Controller Display Outdoor Unit LED Display Method of Communication error between microcomputer mounted on the main PCB and PM1. Malfunction Detection  The abnormality is determined when the data sent from the PM1 can not be received for 9 Malfunction Decision seconds.

  • Page 170: Unspecified Voltage (between Indoor Unit And Outdoor Unit) / Anti-icing Function In Other Rooms

    SiUS12-928_B Troubleshooting for Outdoor Unit Unspecified Voltage (between Indoor Unit and Outdoor Unit) / Anti-icing Function in Other Rooms UA, UH Remote Controller Display Outdoor Unit LED Display Method of A wrong connection is detected by checking the combination of indoor and outdoor units on the Malfunction microcomputer.

  • Page 171: Anti-icing Function

    Troubleshooting for Outdoor Unit SiUS12-928_B Anti-icing Function Remote Controller Display Outdoor Unit LED Display Method of During cooling operation, indoor unit icing is detected by checking the temperatures sensed by the Malfunction indoor heat exchanger thermistor and room temperature thermistor that are located in a shut-down room.

  • Page 172

    SiUS12-928_B Troubleshooting for Outdoor Unit Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Check the wiring and piping. Refer to P.191 Check No.12 Wrong wiring or Activate the wiring error check piping? Refer to P.194...

  • Page 173: Outdoor Unit Pcb Abnormality (24/32 Class Only)

    Troubleshooting for Outdoor Unit SiUS12-928_B Outdoor Unit PCB Abnormality (24/32 Class Only) Remote Controller Display Outdoor Unit LED Display Method of Detect within the program of the microcomputer. Malfunction Detection Malfunction The program of the microcomputer is in abnormal running order. Decision Conditions ...

  • Page 174: Ol Activation (compressor Overload)

    SiUS12-928_B Troubleshooting for Outdoor Unit OL Activation (Compressor Overload) Remote Controller Display Outdoor Unit LED Display Method of A compressor overload is detected through compressor OL. Malfunction Detection  If the error repeats, the system is shut down. Malfunction  Reset condition: Continuous run for about 60 minutes without any other error Decision ...

  • Page 175: Compressor Lock

    Troubleshooting for Outdoor Unit SiUS12-928_B Compressor Lock Remote Controller Display Outdoor Unit LED Display Method of A compressor lock is detected by checking the compressor running condition through the position Malfunction detection circuit. Detection  Judging from the current waveform generated when high-frequency voltage is applied to the Malfunction Decision compressor.

  • Page 176

    SiUS12-928_B Troubleshooting for Outdoor Unit DC Fan Lock Remote Controller Display Outdoor Unit LED Display Method of An error is determined with the high-voltage fan motor rotation speed detected by the Hall IC. Malfunction Detection  The fan does not start in 30 seconds even when the fan motor is running. Malfunction ...

  • Page 177: Input Overcurrent Detection

    Troubleshooting for Outdoor Unit SiUS12-928_B 6.10 Input Overcurrent Detection Remote Controller Display Outdoor Unit LED Display Method of Detected by checking the input current value Malfunction Detection  The input current is at a certain value (depending on the condition) for 2.5 seconds. Malfunction ...

  • Page 178: Four-way Valve Abnormality (18 Class Only)

    SiUS12-928_B Troubleshooting for Outdoor Unit 6.11 Four Way Valve Abnormality (18 Class Only) Remote Controller Display Outdoor Unit LED Display Method of The liquid pipe thermistor and the outdoor heat exchanger thermistor are checked to see if they Malfunction function within their normal ranges in the operating mode. Detection Malfunction Either of the following conditions occurs 6 minutes after the compressor has started.

  • Page 179

    Troubleshooting for Outdoor Unit SiUS12-928_B Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Four way-valve Refer to P.191 coil disconnected (loose)? Correct the four-way valve coil. Check No.13 Refer to P.195 Harness out of...

  • Page 180

    SiUS12-928_B Troubleshooting for Outdoor Unit 6.12 Discharge Pipe Temperature Control Remote Controller Display Outdoor Unit LED Display Method of Detected by the discharge pipe thermistor Malfunction Detection  If the temperature detected by the discharge pipe thermistor rises above Malfunction , the compressor Decision stops.

  • Page 181: High Pressure Control In Cooling

    Troubleshooting for Outdoor Unit SiUS12-928_B 6.13 High Pressure Control in Cooling Remote Controller Display Outdoor Unit LED Display Method of High pressure control (operation halt, frequency drop, etc.) is activated in cooling operation if the Malfunction temperature sensed by the outdoor heat exchanger thermistor exceeds the limit. Detection ...

  • Page 182: Compressor Sensor System Abnormality (24/32 Class Only)

    SiUS12-928_B Troubleshooting for Outdoor Unit 6.14 Compressor Sensor System Abnormality (24/32 Class Only) Remote Controller Display Outdoor Unit LED Display  Fault condition is identified by the supply voltage and the DC voltage which is detected before Method of Malfunction the compressor startup.

  • Page 183

    Troubleshooting for Outdoor Unit SiUS12-928_B Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn off the power. Reactor connection check Connection OK? Connect the reactor properly. Compressor connection check Connect the compressor Connection OK? properly.

  • Page 184: Position Sensor Abnormality

    SiUS12-928_B Troubleshooting for Outdoor Unit 6.15 Position Sensor Abnormality Remote Controller Display Outdoor Unit LED Display Method of A compressor start-up failure is detected by checking the compressor running condition through the position detection circuit. Malfunction Detection  If the error repeats, the system is shut down. Malfunction ...

  • Page 185

    Troubleshooting for Outdoor Unit SiUS12-928_B Troubleshooting 18 class Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.15 Refer to P.196 Turn off the power. Check No.18 Check the power supply voltage. Refer to P.198 Voltage as rated? Correct the power supply.

  • Page 186

    SiUS12-928_B Troubleshooting for Outdoor Unit Troubleshooting 24/32 class Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.15 Refer to P.196 Turn off the power. Check No.18 Check the power supply voltage. Refer to P.198 Voltage as rated? Correct the power supply.

  • Page 187: Ct Or Related Abnormality

    Troubleshooting for Outdoor Unit SiUS12-928_B 6.16 CT or Related Abnormality Remote Controller Display Outdoor Unit LED Display Method of A CT or related error is detected by checking the compressor running frequency and CT-detected Malfunction input current. Detection  The compressor running frequency is more than Malfunction Hz and input current is less than Decision...

  • Page 188

    SiUS12-928_B Troubleshooting for Outdoor Unit Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.15 Turn off the power and turn it on Refer to P.196 again. Check No.21 Start operation.

  • Page 189: Thermistor Or Related Abnormality (outdoor Unit)

    Troubleshooting for Outdoor Unit SiUS12-928_B 6.17 Thermistor or Related Abnormality (Outdoor Unit) H9, J3, J6, J8, J9, P4 Remote Controller Display Outdoor Unit LED Display Method of This type of error is detected by checking the thermistor input voltage to the microcomputer. Malfunction A thermistor error is detected by checking the temperature sensed by each thermistor.

  • Page 190

    SiUS12-928_B Troubleshooting for Outdoor Unit Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Turn on the power again. Refer to P.191 Error displayed Reconnect the connectors again on remote or thermistors.

  • Page 191: Electrical Box Temperature Rise

    Troubleshooting for Outdoor Unit SiUS12-928_B 6.18 Electrical Box Temperature Rise Remote Controller Display Outdoor Unit LED Display Method of An electrical box temperature rise is detected by checking the radiation fin thermistor with the Malfunction compressor off. Detection  With the compressor off, the radiation fin temperature is above Malfunction ...

  • Page 192

    SiUS12-928_B Troubleshooting for Outdoor Unit Troubleshooting 18 class Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 WARNING Turn off the power and turn it on Refer to P.191 again.

  • Page 193

    Troubleshooting for Outdoor Unit SiUS12-928_B Troubleshooting 24/32 class Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.17 WARNING Turn off the power and turn it on Refer to P.198 again.

  • Page 194: Radiation Fin Temperature Rise

    SiUS12-928_B Troubleshooting for Outdoor Unit 6.19 Radiation Fin Temperature Rise Remote Controller Display Outdoor Unit LED Display Method of A radiation fin temperature rise is detected by checking the radiation fin temperature with the Malfunction compressor on. Detection  The radiation fin temperature with the compressor on is above Malfunction ...

  • Page 195

    Troubleshooting for Outdoor Unit SiUS12-928_B Troubleshooting 18 class Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 (Precaution before turning on the power again) Make sure the power has been off for at least 30 seconds. Refer to P.191 Turn off the power and turn it on Check No.17...

  • Page 196

    SiUS12-928_B Troubleshooting for Outdoor Unit Troubleshooting 24/32 class Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.17 Refer to P.198 Turn off the power and turn it on again to start the system.

  • Page 197: Output Overcurrent Detection

    Troubleshooting for Outdoor Unit SiUS12-928_B 6.20 Output Overcurrent Detection Remote Controller Display Outdoor Unit LED Display Method of An output overcurrent is detected by checking the current that flows in the inverter DC section. Malfunction Detection  A position signal error occurs while the compressor is running. Malfunction ...

  • Page 198

    SiUS12-928_B Troubleshooting for Outdoor Unit Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.15 ∗ An output overcurrent may result from wrong internal wiring. If the system is interrupted by an output Refer to P.196 overcurrent after the wires have been disconnected and reconnected for part replacement, check the wiring again.

  • Page 199: Check, Thermistor Resistance Check

    Check SiUS12-928_B 7. Check Thermistor Resistance Check Check No.01 Disconnect the connectors of the thermistors from the PCB, and measure the resistance of each thermistor using tester. The relationship between normal temperature and resistance is shown in the table and the graph below.

  • Page 200: Fan Motor Connector Check, Hall Ic Check

    SiUS12-928_B Check Fan Motor Connector Check Check No.02 CTXS/FTXS Series 1. Check the connection of connector. 2. Check motor power supply voltage output (pins 4 - 7). 3. Check motor control voltage (pins 4 - 3). 4. Check rotation command voltage output (pins 4 - 2). 5.

  • Page 201: Power Supply Waveform Check

    Check SiUS12-928_B Power Supply Waveform Check Check No.11 Measure the power supply waveform between No. 1 and No. 2 on the terminal board, and check the waveform disturbance.  Check to see if the power supply waveform is a sine wave (Fig.1). ...

  • Page 202: Outdoor Electronic Expansion Valve Check

    SiUS12-928_B Check Outdoor Electronic Expansion Valve Check Check No.12 Conduct the followings to check the outdoor electronic expansion valve (EV). 1. Check to see if the EV connector is correctly inserted in the PCB. Match the EV unit number and the connector number.

  • Page 203: Four Way Valve Performance Check, Inverter Unit Refrigerant System Check

    Check SiUS12-928_B Four Way Valve Performance Check Check No.13 Turn off the power and turn it on again. * Four-way valve coil Start heating operation. Cooling / dry : No continuity Heating : Continuity S80 voltage at 208/230 VAC with Replace the outdoor unit compressor on? (Fig.

  • Page 204: Inverter Checker" Check

    SiUS12-928_B Check “Inverter Checker” Check  Characteristics Check No.15 If abnormal stop occurs due to compressor startup failure or overcurrent output when using an inverter unit, it is difficult to judge whether the stop is caused by the compressor failure or some other failure (control PCB, power module, etc.).

  • Page 205: Rotation Pulse Check On The Outdoor Unit Pcb

    Check SiUS12-928_B  Diagnose method (Diagnose according to 6 LEDs lighting status.) (1) If all the LEDs are lit uniformly, the compressor is defective.  Replace the compressor. (2) If the LEDs are not lit uniformly, check the power module. ...

  • Page 206: Installation Condition Check, Discharge Pressure Check

    SiUS12-928_B Check 7.10 Installation Condition Check Check No.17 Installation condition check Check the allowable dimensions of the air Change the installation suction and location or direction. discharge area. Is the discharged air Change the installation short-circuited? location or direction. Is the outdoor heat Clean the outdoor heat exchanger very dirty? exchanger.

  • Page 207: Outdoor Fan System Check, Main Circuit Short Check

    Check SiUS12-928_B 7.12 Outdoor Fan System Check Check No.19 Check the outdoor unit fan system. Fan motor lead wire Outdoor unit fan running? Reconnect the connector. connector disconnected? Outdoor unit fan system Go to Check No. 16. functioning. (R15128) 7.13 Main Circuit Short Check Check No.20 Note: Check to make sure that the voltage between (+) and (–) of the diode bridge (DB1) is approx.

  • Page 208: Capacitor Voltage Check

    SiUS12-928_B Check 7.14 Capacitor Voltage Check Check No.21 Before this check, be sure to check the main circuit for short circuit. With the circuit breaker still on, measure the voltage according to the drawing of the model in question. Be careful never to touch any live parts. 18 class Multimeter (DC.

  • Page 209: Power Module Check

    Check SiUS12-928_B 7.15 Power Module Check Check No.22 Note: Check to make sure that the voltage between (+) and (–) of the power module (PM1) is approx. 0 V before checking.  Disconnect the compressor harness connector from the outdoor unit PCB. To disengage the connector, press the protrusion on the connector.

  • Page 210: Removal Procedure, Part

    SiUS12-928_B Part 7 Removal Procedure 1. Outdoor Unit: 2MXS18GVJU ..............203 1.1 Removal of Outer Panels ................. 203 1.2 Removal of Electrical Box ................ 204 1.3 Removal of PCBs ..................209 1.4 Removal of Fan Motor................212 1.5 Removal of Sound Blankets ..............213 1.6 Removal of Coils / Thermistors ..............

  • Page 211: Outdoor Unit: 2mxs18gvju, Removal Of Outer Panels

    Outdoor Unit: 2MXS18GVJU SiUS12-928_B 1. Outdoor Unit: 2MXS18GVJU Removal of Outer Panels Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Appearance features (R2159) Remove the 4 screws of Top panel the top panel and the 6 screws of the front panel.

  • Page 212: Removal Of Electrical Box

    SiUS12-928_B Outdoor Unit: 2MXS18GVJU Removal of Electrical Box Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points  The US model has a 1. Disconnect the connecting wires.

  • Page 213

    Outdoor Unit: 2MXS18GVJU SiUS12-928_B Step Procedure Points  When reassembling, insert Disconnect the connector [S80] for the four-way valve coil the clamp into the hole as [S80]. below. Clamp (R17397) (R17398) Disconnect the [S40]: overload protector connectors for the [S90]: thermistors [S90] [S92] [S93] thermistors [S90] [S92] (outdoor temperature, outdoor...

  • Page 214

    SiUS12-928_B Outdoor Unit: 2MXS18GVJU Step Procedure Points Disconnect the relay connector of the compressor. (R17065) Release the clamp with pliers. (R17066) Disconnect the reactor lead wires. Reactor (R2170) Removal Procedure...

  • Page 215

    Outdoor Unit: 2MXS18GVJU SiUS12-928_B Step Procedure Points 3. Remove the electrical box. Shield plate Remove the screw of the shield plate. (R17345) Unfasten the 2 hooks and remove the shield plate. (R17346) Hook Remove the screw on the right side of the electrical box.

  • Page 216

    SiUS12-928_B Outdoor Unit: 2MXS18GVJU Step Procedure Points Remove the drip proof Drip proof cover cover. (R2174) Disconnect the connector Inverter PCB (MID2) for the fan motor [S70] from the inverter PCB (MID2). Release the fan motor lead wire from the hooks. [S70] (R2175) Remove the electrical...

  • Page 217: Removal Of Pcbs

    Outdoor Unit: 2MXS18GVJU SiUS12-928_B Removal of PCBs Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points  When reassembling, insert Remove the screw of the main PCB, and unfasten the base bar into the hole of the 2 hooks.

  • Page 218

    SiUS12-928_B Outdoor Unit: 2MXS18GVJU Step Procedure Points Lift up the main PCB. (R2181) Disconnect the connectors [S31] [S32] [S33] [S71] [H1] [H2]. [S31] [S71] [S33] (R10362) [S32] [H1] (yellow) [H2] (blue) (R10363)  Refer to page 30 for detail. The figure shows the main PCB.

  • Page 219

    Outdoor Unit: 2MXS18GVJU SiUS12-928_B Step Procedure Points Unfasten the 2 hooks and remove the service monitor PCB. Hook Priority room setting switch (SW4) LED A Wiring error check switch LED 1 (SW3) LED 2 Forced operation [ON/OFF] LED 3 switch (SW1) LED 4 NIGHT QUIET mode setting Operation mode switch...

  • Page 220: Removal Of Fan Motor

    SiUS12-928_B Outdoor Unit: 2MXS18GVJU Removal of Fan Motor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the nut and Preparation remove the outdoor fan. Disconnect the connector for the fan motor and release the fan motor lead wire according to the...

  • Page 221: Removal Of Sound Blankets

    Outdoor Unit: 2MXS18GVJU SiUS12-928_B Removal of Sound Blankets Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the 5 screws of the right side panel. Right side panel (R10364)

  • Page 222

    SiUS12-928_B Outdoor Unit: 2MXS18GVJU Step Procedure Points Remove the sound  Carefully remove the sound blankets (top upper, top blanket, which is easily torn in inner, outer, inner). the piping section. Sound blanket (top upper) Sound blanket (top inner) Sound blanket (inner) Sound blanket (outer)

  • Page 223: Removal Of Coils / Thermistors

    Outdoor Unit: 2MXS18GVJU SiUS12-928_B Removal of Coils / Thermistors Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the screw and remove the four-way valve coil. Four way valve coil (R2194)

  • Page 224

    SiUS12-928_B Outdoor Unit: 2MXS18GVJU Step Procedure Points  Place the thermistor so that its Remove the putty, and remove each thermistor. edge comes up to the edge of the fixture.  Be careful not to lose the clip and fixture for the thermistors. Liquid pipe thermistor Gas pipe thermistor...

  • Page 225: Removal Of Four Way Valve / Defrost Solenoid Valve

    Outdoor Unit: 2MXS18GVJU SiUS12-928_B Removal of Four-Way Valve / Defrost Solenoid Valve Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the screw and remove the four way valve Warning coil.

  • Page 226

    SiUS12-928_B Outdoor Unit: 2MXS18GVJU Step Procedure Points Disconnect the 2 brazed Note: points, first (e), and then  Do not use a metal saw for (f). cutting pipes or sawdust will Remove the defrost enter the circuit. solenoid valve.  When withdrawing the pipes, be careful not to pinch them firmly with pliers.

  • Page 227: Removal Of Distributor

    Outdoor Unit: 2MXS18GVJU SiUS12-928_B Removal of Distributor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points  Before working, make sure that the refrigerant gas is Warning empty in the circuit.

  • Page 228: Removal Of Compressor

    SiUS12-928_B Outdoor Unit: 2MXS18GVJU Removal of Compressor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the terminal Terminal cover cover. (R2205) Disconnect the compressor lead wires. U (red) N (brown) W (blue)

  • Page 229

    Outdoor Unit: 2MXS18GVJU SiUS12-928_B Step Procedure Points  Before working, make sure that the refrigerant gas is Warning empty in the circuit. Be careful not to get yourself  Be sure to apply nitrogen burnt with pipes and other replacement when heating parts that are heated by the gas up the brazed part.

  • Page 230: Outdoor Unit: 3mxs24jvju, 4mxs32gvju, Removal Of Outer Panels

    SiUS12-928_B Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU 2. Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU Removal of Outer Panels Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Appearance features (R6368) ...

  • Page 231

    Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU SiUS12-928_B Step Procedure Points Slide the suction grille Hook downward to unfasten the 3 top hooks. (R14613) Remove the suction grille. (R6372) 2. Remove the top panel. Top panel Remove the 4 screws on the back and the screw on the left side.

  • Page 232

    SiUS12-928_B Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU Step Procedure Points Remove the 2 screws on the front and the screw on the right side panel. Right side panel (R6374) Lift the top panel and remove it. (R6375) 3. Remove the right side panel. Remove the 5 screws.

  • Page 233

    Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU SiUS12-928_B Step Procedure Points Slide the right side panel downward to unfasten the 2 hooks on the back side. (R6377) Hook (R14614) Hook (R14615) Removal Procedure...

  • Page 234

    SiUS12-928_B Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU Step Procedure Points  The US model has a service lid Remove the right side panel. on the stop valve mounting plate. Remove the 2 screws to remove the service lid. Service lid Screw (R10372) ...

  • Page 235

    Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU SiUS12-928_B Step Procedure Points (R6383) Remove the front panel (2). (R10375)  Remove the discharge grille 5. Remove the front panel (1). and outdoor fan first to Remove the 4 screws on remove the front panel (1). the discharge grille.

  • Page 236

    SiUS12-928_B Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU Step Procedure Points Slide the discharge grille downward to unfasten the 2 hooks at the top. Hook (R17173) Remove the discharge grille. (R10380)  Nut size : M8 Remove the nut and remove the outdoor fan. 13 mm (0.51 inch) Outdoor fan...

  • Page 237

    Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU SiUS12-928_B Step Procedure Points Remove the 2 screws of the partition plate (1). Partition plate (1) (R10382) Remove the screw at the bottom left of the front Front panel (1) panel (1). (R10383) Remove the screw at the bottom of the left side.

  • Page 238

    SiUS12-928_B Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU Step Procedure Points Remove the screw at the bottom of the back side. (R6394) The front panel (1) has a hook. Lift the front panel (1). Hook (R17174) Remove the front panel (1). (R10385)  Be sure to detach the front panel (1) carefully so as not to deform it.

  • Page 239

    Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU SiUS12-928_B Step Procedure Points 6. Remove the rear panel. Remove the 2 screw on the partition plate (2). Rear panel Partition plate (2) (R10386)  When reassembling, bundle Slide the partition plate (2) to the left and remove it. the wires with clamp.

  • Page 240

    SiUS12-928_B Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU Step Procedure Points Release the thermistor wire from the groove. Groove (R10389) Remove the 3 screws on the rear panel. (R10390) Remove the screw on the bottom frame. (R10391) Removal Procedure...

  • Page 241

    Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU SiUS12-928_B Step Procedure Points Remove the screw on the stop valve mounting plate. Stop valve mounting plate (R10392) Lift the rear panel to unfasten the 2 hooks. Hook Hook Hook (R12918) Remove the rear panel. (R10394) Removal Procedure...

  • Page 242

    SiUS12-928_B Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU Removal of Electrical Box Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the 2 screws to detach the ground wires. (R10396) Disconnect the connector [S70]...

  • Page 243

    Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU SiUS12-928_B Step Procedure Points  Pull out the clamp. Disconnect the connector [S80] for the four-way valve coil [S80]. Clamp (R10398)  A : [S20] (white) Disconnect the 4 connectors for the B : [S21] (red) electronic expansion C : [S22] (blue) valve coils (for room A, B,...

  • Page 244

    SiUS12-928_B Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU Step Procedure Points  When reassembling, insert Disconnect the connector for the gas pipe the clamp into the hole. [S92] thermistors [S92] and pull [S92] out the clamp. Clamp (R17356) (R10537)  When reassembling, insert Disconnect the connector for the thermistors [S90] the clamp into the hole.

  • Page 245

    Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU SiUS12-928_B Step Procedure Points Disconnect the connector for the overload protector [S40] [S40]. (R10539) The wire harness for the compressor is attached to the partition plate (1) by the clamp. Clamp (R6422) Pull out the clamp with pliers.

  • Page 246

    SiUS12-928_B Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU Step Procedure Points Disconnect the relay connector of the compressor. (R6469) Remove the screw on the stop valve mounting plate. Electrical box Stop valve mounting plate (R10395) Remove the screw on the partition plate (1). Partition plate (1) (R6411) Removal Procedure...

  • Page 247

    Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU SiUS12-928_B Step Procedure Points Slide the electrical box leftward to unfasten the hook on the right side. Hook (R10401) Remove the electrical box. (R10402) Removal Procedure...

  • Page 248

    SiUS12-928_B Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU Removal of PCBs Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the main PCB. Hook  Unfasten the 4 hooks. The Open the cover of the hooks are marked with .

  • Page 249

    Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU SiUS12-928_B Step Procedure Points  Refer to page 33 for detail. Disconnect the [S51] [S101] connectors. [S10] [S51] [S101] : service monitor [HR2] [AC2] [HR1] [S10] : terminal board [AC1] (transmission) [HR1] [HR2] : reactor [AC1] [AC2] : terminal board (power supply) [U] [V] [W] : compressor (R10407)

  • Page 250

    SiUS12-928_B Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU Step Procedure Points 3. Remove the service monitor PCB. [S102] Disconnect the connectors from the service monitor PCB [S52] [S102]. [S52] Service monitor PCB (R10410) Slightly lift the top hook to unfasten it. (R6436) Unfasten the bottom hook to remove the service monitor PCB.

  • Page 251

    Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU SiUS12-928_B Step Procedure Points 4. Remove the terminal board. Remove the screw. Terminal board (R10411) Unfasten the hook. (R10412) Remove the terminal board. (R10413) Removal Procedure...

  • Page 252

    SiUS12-928_B Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU Removal of Fan Motor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points (R10414)  Be sure to remove the lower Remove the 2 lower screws of the fan motor.

  • Page 253

    Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU SiUS12-928_B Removal of Coils / Thermistors Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the electronic expansion valve coil. Pull the electronic expansion valve coils.

  • Page 254

    SiUS12-928_B Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU Step Procedure Points Peel the putty, and pull out the liquid pipe thermistors. Liquid pipe thermistor (R17413)  Be careful not to lose the fixtures for the thermistors. Liquid pipe thermistor Fixture (R6450) Pull out the outdoor heat exchanger thermistor.

  • Page 255

    Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU SiUS12-928_B Step Procedure Points  Be careful not to lose the clip Remove the clip from the outdoor heat exchanger for the thermistor. thermistor. Clip (R6452) Slightly open the sound blanket (outer). Sound blanket (outer) (R10418) Remove the sound blanket (top upper).

  • Page 256

    SiUS12-928_B Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU Step Procedure Points Remove the discharge pipe thermistor. Discharge pipe thermistor (R10420)  Be careful not to lose the Remove the fixture. fixture for the thermistor. Fixture (R10430) 3. Remove the four-way valve coil. Remove the screw. (R10431) Removal Procedure...

  • Page 257

    Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU SiUS12-928_B Step Procedure Points Remove the four-way valve coil. Four-way valve coil (R10432) Removal Procedure...

  • Page 258

    SiUS12-928_B Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU Removal of Sound Blankets Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Open the sound blanket (outer). Sound blanket (outer) (R10433) ...

  • Page 259

    Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU SiUS12-928_B Step Procedure Points  The sound blanket is fragile. Remove the sound blanket (outer). Carefully pass the discharge pipe through it. Sound blanket (outer) (R10436)  The sound blanket is fragile. Remove the sound blanket (top inner). Carefully pass the discharge pipe through it.

  • Page 260

    SiUS12-928_B Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU Step Procedure Points Remove the sound blanket (inner). (R10439) Removal Procedure...

  • Page 261

    Outdoor Unit: 3MXS24JVJU, 4MXS32GVJU SiUS12-928_B Removal of Compressor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the terminal cover. Terminal cover (R6466)  U : red, V : yellow, W : blue Disconnect the U(red) compressor lead wires.

  • Page 262: Trial Operation And Field Settings, Part

    SiUS12-928_B Part 8 Trial Operation and Field Settings 1. Pump Down Operation................255 2. Forced Operation ..................256 3. Wiring Error Check Function ..............257 4. Trial Operation ..................259 5. Field Settings ..................261 5.1 Outdoor Unit ..................... 261 5.2 Indoor Unit....................264 6. Application of Silicon Grease to a Power Transistor and a Diode Bridge ...................267 Trial Operation and Field Settings...

  • Page 263: Pump Down Operation

    Pump Down Operation SiUS12-928_B 1. Pump Down Operation Outline In order to protect the environment, be sure to conduct pump down operation when relocating or disposing the unit. Detail 1) Remove the valve caps from the liquid stop valve and the gas stop valve. 2) Carry out forced cooling operation.

  • Page 264: Forced Operation

    SiUS12-928_B Forced Operation 2. Forced Operation Outline Forced operation mode includes forced cooling and forced heating. Operation mode can be selected by the operation mode switch (SW2) on the outdoor unit. Press the forced operation [ON/ OFF] switch (SW1) on the outdoor unit to start the operation. Detail Item Forced Cooling...

  • Page 265: Wiring Error Check Function

    Wiring Error Check Function SiUS12-928_B 3. Wiring Error Check Function Outline The convenient wiring error check function is designed for the microcomputer to correct wiring errors itself. If local wiring is unclear in the case of buried piping, for example, just press the wiring error check switch that is behind the stop valve cover of the outdoor unit.

  • Page 266

    SiUS12-928_B Wiring Error Check Function  Refrigerant flows from Port A and on. The temperatures of the indoor heat exchanger Basic Knowledge thermistors are detected one by one to check up the matching between the piping and wiring.  With this function on, freezing (crackling) noise may be heard from the indoor unit. This is not a problem.

  • Page 267: Trial Operation

    Trial Operation SiUS12-928_B 4. Trial Operation Outline 1. Measure the power supply voltage and make sure that it falls in the specified range. 2. Trial operation should be carried out in either cooling or heating operation. 3. Carry out the trial operation in accordance with the operation manual to ensure that all functions and parts, such as louver movement, are working properly.

  • Page 268

    SiUS12-928_B Trial Operation ARC433 Series (1) Press the [ON/OFF] button to turn on the system. (2) Press the center of the [TEMP] button and the [MODE] button at the same time. (3) Press the [MODE] button twice. (T appears on the display to indicate that trial operation is selected.) (4) Press the [MODE] button and select the operation mode.

  • Page 269: Field Settings, Outdoor Unit

    Field Settings SiUS12-928_B 5. Field Settings Outdoor Unit 5.1.1 Priority Room Setting Outdoor electronic expansion valves are controlled to provide more capacity to the prioritized room.  Setting method Turn off the circuit breaker before changing the setting. Only one room can be set as the priority room (By turning on one of the SW4 on the service monitor PCB of the outdoor unit).

  • Page 270

    SiUS12-928_B Field Settings 5.1.2 COOL / HEAT Mode Lock Use the [S15] connector to set the unit to cooling only or heating only. Setting to heating only (H): Short-circuit pins 1 and 3 of the connector [S15]. Setting to cooling only (C): Short-circuit pins 3 and 5 of the connector [S15]. The following specifications apply to the connector housing and pins.

  • Page 271

    Field Settings SiUS12-928_B 5.1.3 NIGHT QUIET Mode If NIGHT QUIET mode is to be used, initial settings must be made when the unit is installed. Explain the function of NIGHT QUIET mode, as described below, to the customer, and confirm whether or not the customer wants to use NIGHT QUIET mode.

  • Page 272

    SiUS12-928_B Field Settings Indoor Unit 5.2.1 Model Type Setting ARC452A21, ARC452A23  The remote controller is common to the heat pump model and cooling only model. Use the DIP switch on the remote controller to set the model type.  Set the DIP switch as shown in the illustration. (The factory set is the heat pump side.) •...

  • Page 273

    Field Settings SiUS12-928_B 5.2.3 When 2 Units are Installed in 1 Room Outline When 2 indoor units are installed in 1 room, 1 of the 2 indoor units and the corresponding wireless remote controller can be set for different address. Both the indoor unit PCB and the wireless remote controller need alteration.

  • Page 274

    SiUS12-928_B Field Settings Wireless Remote (1) Remove the cover and take it off. (2) Cut the address setting jumper. Controller ARC452 series ARC433 series Jumper Jumper ADDRESS EXIST ADDRESS (R6573) EXIST (R12065) 5.2.4 Jumper Settings Jumper (on indoor Function When connected When cut unit PCB) (factory set)

  • Page 275

    Application of Silicon Grease to a Power Transistor and a Diode Bridge SiUS12-928_B 6. Application of Silicon Grease to a Power Transistor and a Diode Bridge Applicable All outdoor units using inverter type compressor for room air conditioner. Models When the printed circuit board (PCB) of an outdoor unit is replaced, it is required that silicon grease (1) is certainly applied to the heat radiation part (the contact point to the radiation fin) of the power transistor and diode bridge.

  • Page 276: Appendix

    SiUS12-928_B Part 9 Appendix 1. Piping Diagrams..................269 1.1 Indoor Unit....................269 1.2 Outdoor Unit ..................... 271 2. Wiring Diagrams..................273 2.1 Indoor Unit....................273 2.2 Outdoor Unit ..................... 276 Appendix...

  • Page 277: Piping Diagrams, Indoor Unit

    Piping Diagrams SiUS12-928_B 1. Piping Diagrams Indoor Unit CTXS07JVJU, CTXS09/12HVJU FTXS15/18HVJU INDOOR UNIT INDOOR UNIT ( 5/16CuT ) (5/16CuT) HEAT EXCHANGER HEAT EXCHANGER THERMISTOR THERMISTOR ON HEAT EXCH. ON HEAT EXCH. CROSS FLOW FAN FIELD PIPING CROSS FLOW FAN FIELD PIPING (1/4CuT) ( 1/4CuT ) FAN MOTOR...

  • Page 278

    SiUS12-928_B Piping Diagrams FDXS09/12DVJU FDXS09/12LVJU INDOOR UNIT INDOOR UNIT (1/4CuT) ( 1/4CuT ) HEAT EXCHANGER HEAT EXCHANGER THERMISTOR ON HEAT EXCH. THERMISTOR FIELD PIPING ON HEAT FIELD PIPING (1/4CuT) SIROCCO FAN ( 1/4CuT ) EXCH. SIROCCO FAN FAN MOTOR FAN MOTOR FIELD PIPING (3/8CuT) FIELD PIPING...

  • Page 279

    Piping Diagrams SiUS12-928_B Outdoor Unit 2MXS18GVJU OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPERATURE THERMISTOR ( DOA ) HEADER MOTOR OPERATED VALVE LIQUID PIPE THERMISTOR ( DLA ) 1/4CuT HEADER 3/8CuT ROOM A FIELD FILTER ( 1/4CuT ) MOTOR OPERATED VALVE LIQUID PIPE PIPING THERMISTOR ( DLB ) LIQUID...

  • Page 280

    SiUS12-928_B Piping Diagrams 4MXS32GVJU OUTDOOR UNIT MOTOR OPERATED LIQUID PIPE HEAT EXCHANGER VALVE (A) OUTDOOR TEMPERATURE THERMISTOR 5/16CuT (ROOM-A) THERMISTOR RECEIVER 5/16CuT HEADER 5/16CuT ROOM A HEADER MOTOR OPERATED (1/4CuT) FILTER 5/16CuT LIQUID PIPE VALVE (B) THERMISTOR 5/16CuT (ROOM-B) 3/8CuT 5/16CuT 5/16CuT ROOM B...

  • Page 281: Wiring Diagrams, Indoor Unit

    Wiring Diagrams SiUS12-928_B 2. Wiring Diagrams Indoor Unit CTXS07JVJU, CTXS09/12HVJU FIELD WIRING. PCB3 PCB1 RECTIFIER 3.15A OUTDOOR t° CAUTION TRANSMISSION NOTE THAT OPERATION WILL CIRCUIT RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS PCB4 TURNED OFF AND THEN BACK ON AGAIN. LED1 LED2 LED3...

  • Page 282

    SiUS12-928_B Wiring Diagrams CTXS07LVJU, FTXS09/12LVJU PCB1 PCB2 V1TR 3.15A outdoor FIELD WIRING. TERMINAL FOR CAUTION TRANSMISSION CENTRALIZED CONTROL NOTE THAT OPERATION WILL CIRCUIT RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS SIGNAL TURNED OFF AND THEN BACK ON AGAIN. RECEIVER 2 RTH1 H1P ~ H3P : PILOT LAMP...

  • Page 283

    Wiring Diagrams SiUS12-928_B FDXS09/12DVJU PCB1 PCB2 V1TR outdoor 3.15A FIELD WIRING. TERMINAL FOR CAUTION CENTRALIZED CONTROL TRANSMISSION NOTE THAT OPERATION WILL CIRCUIT RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS SIGNAL TURNED OFF AND THEN BACK ON AGAIN. RECEIVER 2 RTH1 H1P ~ H3P : PILOT LAMP : FAN MOTOR...

  • Page 284

    SiUS12-928_B Wiring Diagrams Outdoor Unit 2MXS18GVJU POWER SUPPLY FU201 MID2 ~ 60Hz 208-230V 3.15A FIELD WIRING MRM20 MRM10 X11A TO INDOOR UNIT CN11 ROOM A MID1 R12T CN14 3.15A t° ROOM B S101 12 1 t° t° t° t° t° t°...

  • Page 285

    Wiring Diagrams SiUS12-928_B 4MXS32GVJU POWER SUPPLY MRM20 ~60Hz 208-230V 3.15A V100 MRM10 6(P) + + + 7(N) TO INDOOR UNIT X11A ROOM B 3.15A ROOM A PCB1 ROOM C S101 t° t° t° t° t° t° t° t° t° t° t° ROOM D S102 PCB2...

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