SUPER MULTI NX G-Series / J-Series Service Manual

This Service Manual is forSUPER MULTI NX G-Series / J-Series Heat Pump

Indoor Units:
CTXS07JVJU ; CTXS09HVJU ; CTXS12HVJU ; FTXS15HVJU ; FTXS18HVJU ; FDXS09DVJU ; FDXS12DVJU
Outdoor Units:
2MXS18GVJU ; 3MXS24JVJU ; 4MXS32GVJU
 

CONTENTS:

  • 1. Safety Considerations …
  • 1.1 Safety Considerations for Repair …
  • 1.2 Safety Considerations for Users …
  • List of Functions … page 1

  • 1. Functions … page 3
  • Specifications … page 7

  • 1. Specifications … page 9
  • 1.1 Indoor Unit … page 9
  • 1.2 Outdoor Unit … page 11
  • Printed Circuit Board
    Connector Wiring Diagram … page 15

  • 1. Printed Circuit Board Connector
    Wiring Diagram … page 17
  • 1.1 Indoor Unit – Duct-Free
    System … page 17
  • 1.2 Indoor Unit – Slim Duct
    Built-in System … page 19
  • 1.3 Outdoor Unit – 2MXS18GVJU … page 21
  • 1.4 Outdoor Unit – 3MXS24JVJU,
    4MXS32GVJU … page 24
  • Function and Control … page 27

  • 1. Main Functions … page 29
  • 1.1 Temperature Control … page 29
  • 1.2 Frequency Principle … page 29
  • 1.3 Airflow Direction Control
    (Duct-Free System) … page 31
  • 1.4 Fan Speed Control for
    Indoor Units … page 32
  • 1.5 Program Dry Operation … page 33
  • 1.6 Automatic Operation … page 34
  • 1.7 Thermostat Control … page 35
  • 1.8 NIGHT SET Mode … page 36
  • 1.9 HOME LEAVE Operation … page 37
  • 1.10 INTELLIGENT EYE Operation … page 38
  • 1.11 Inverter POWERFUL Operation … page 39
  • 1.12 Other Functions … page 40
  • 2. Function of Thermistor … page 42
  • 3. Control Specification … page 44
  • 3.1 Mode Hierarchy … page 44
  • 3.2 Frequency Control … page 45
  • 3.3 Controls at Mode Changing
    / Start-up … page 47
  • 3.4 Discharge Pipe Temperature
    Control … page 49
  • 3.5 Input Current Control … page 49
  • 3.6 Freeze-up Protection Control … page 50
  • 3.7 Heating Peak-cut Control … page 50
  • 3.8 Outdoor Fan Control … page 51
  • 3.9 Liquid Compression Protection
    Function … page 51
  • 3.10 Defrost Control … page 52
  • 3.11 Low Hz High Pressure Limit … page 53
  • 3.12 Electronic Expansion Valve
    Control … page 53
  • 3.13 Malfunctions … page 57
  • 3.14 Forced Operation Mode … page 59
  • Operation Manual … page 61

  • 1. System Configuration … page 63
  • 2. Duct-Free System … page 64
  • 2.1 Remote Controller … page 64
  • 2.2 AUTO · DRY · COOL · HEAT ·
    FAN Operation … page 66
  • 2.3 Adjusting the Airflow Direction … page 68
  • 2.4 INTELLIGENT EYE Operation … page 70
  • 2.5 POWERFUL Operation … page 72
  • 2.6 OUTDOOR UNIT Quiet Operation … page 73
  • 2.7 HOME LEAVE Operation … page 74
  • 2.8 TIMER Operation … page 76
  • 2.9 Note for Multi System … page 78
  • 3. Slim Duct Built-In System … page 80
  • 3.1 Remote Controller … page 80
  • 3.2 AUTO / DRY / COOL / HEAT /
    FAN Operation … page 81
  • 3.3 POWERFUL Operation … page 83
  • 3.4 OUTDOOR UNIT QUIET Operation … page 84
  • 3.5 HOME LEAVE Operation … page 85
  • 3.6 TIMER Operation … page 87
  • Service Diagnosis … page 89

  • 1. Caution for Diagnosis … page 91
  • 1.1 Troubleshooting with LED … page 91
  • 2. Problem Symptoms and
    Measures … page 93
  • 3. Service Check Function … page 94
  • 3.1 ARC452 Series Remote
    Controller … page 94
  • 3.2 ARC433 Series Remote
    Controller … page 97
  • 4. Code Indication on the
    Remote Controller … page 100
  • 4.1 Error Codes and Description
    of Fault … page 100
  • 5. Troubleshooting … page 101
  • 5.1 Indoor Unit … page 101
  • 5.2 Outdoor Unit … page 102
  • 5.3 Indoor Unit PCB Abnormality … page 103
  • 5.4 Freeze-up Protection Control
    or Heating Peak-cut Control … page 104
  • 5.5 Fan Motor or Related Abnormality … page 106
  • 5.6 Thermistor or Related Abnormality
    (Indoor Unit) … page 109
  • 5.7 Signal Transmission Error (between Indoor
    and Outdoor Units) … page 110
  • 5.8 Unspecified Voltage (between
    Indoor and Outdoor Units) … page 112
  • 5.9 Anti-icing Function … page 113
  • 5.10 Outdoor Unit PCB Abnormality
    (24/32 Class) … page 115
  • 5.11 OL Activation (Compressor Overload) … page 116
  • 5.12 Compressor Lock … page 117
  • 5.13 DC Fan Lock … page 118
  • 5.14 Input Overcurrent Detection … page 119
  • 5.15 Four-Way Valve Abnormality
    (18 Class) … page 121
  • 5.16 Discharge Pipe Temperature
    Control … page 123
  • 5.17 High Pressure Control in
    Cooling … page 124
  • 5.18 Compressor Sensor System
    Abnormality (24/32 Class) … page 126
  • 5.19 Position Sensor Abnormality … page 128
  • 5.20 CT or Related Abnormality … page 131
  • 5.21 Thermistor or Related
    Abnormality (Outdoor Unit) … page 133
  • 5.22 Electrical Box Temperature Rise … page 135
  • 5.23 Radiation Fin Temperature Rise … page 138
  • 5.24 Output Overcurrent Detection … page 141
  • 5.25 Refrigerant Shortage … page 143
  • 5.26 Low-voltage Detection or
    Over-voltage Detection … page 146
  • 5.27 Signal Transmission Error
    (on Outdoor Unit PCB) (24/32 Class) … page 147
  • 5.28 Unspecified Voltage (between Indoor and Outdoor
    Units) / Anti-icing Function in Other Rooms … page 148
  • 6. Check … page 149
  • 6.1 How to Check … page 149
  • Removal Procedurev … page 159

  • 1. Outdoor Unit – 2MXS18GVJU … page 161
  • 1.1 Removal of the Outer Panels … page 161
  • 1.2 Removal of the Electrical Box … page 162
  • 1.3 Removal of the PCB … page 166
  • 1.4 Removal of the Fan Motor … page 170
  • 1.5 Removal of the Sound Blanket … page 171
  • 1.6 Removal of the Coils and Thermistors … page 173
  • 1.7 Removal of the Four-Way Valve and Defrost
    Solenoid Valve Procedure … page 175
  • 1.8 Removal of the Compressor … page 177
  • 2. Outdoor Unit – 3MXS24JVJU / 4MXS32GVJU … page 179
  • 2.1 Removal of the Outer Panels … page 179
  • 2.2 Removal of the Electrical Box … page 193
  • 2.3 Removal of the PCB … page 199
  • 2.4 Removal of the Fan Motor … page 204
  • 2.5 Removal of the Coils and Thermistors … page 205
  • 2.6 Removal of the Sound Blanket … page 211
  • 2.7 Removal of the Compressor … page 214
  • Trial Operation and
    Field Setting … page 215

  • 1. Trial Operation … page 217
  • 2. Wiring Error Check Function … page 219
  • 3. Field Settings … page 221
  • 3.1 Priority Room Setting … page 221
  • 3.2 COOL / HEAT Mode Lock … page 221
  • 3.3 NIGHT QUIET Mode … page 222
  • 3.4 When 2 Units are Installed
    in 1 Room … page 223
  • 4. Application of Silicon Grease
    to a Power Transistor and a Diode
    Bridge … page 224
  • Appendix … page 225

  • 1. Piping Diagrams … page 227
  • 1.1 Indoor Unit … page 227
  • 1.2 Outdoor Unit … page 228
  • 2. Wiring Diagrams … page 230
  • 2.1 Indoor Unit … page 230
  • 2.2 Outdoor Unit … page 232