Quaternity Inverter Pair Wall Mounted Type H-Series Service Manual

This Service Manual is for Inverter Pair Wall Mounted Type H-Series Heat Pump

Indoor Units
FTXG09HVJU ; FTXG12HVJU ; FTXG15HVJU
Outdoor Units
RXG09HVJU ; RXG12HVJU ; RXG15HVJU
 

CONTENTS:

  • SAFETY CONSIDERATIONS …
  • List of Functions … page 1

  • 1. Functions … page 2
  • Specifications … page 3

  • 1. Specifications … page 4
  • Printed Circuit Board
    Connector Wiring Diagram … page 7

  • 1. Printed Circuit Board Connector
    Wiring Diagram … page 8
  • 1.1 Indoor Unit … page 8
  • 1.2 Outdoor Unit … page 10
  • Function and Control … page 11

  • 1. Description of Operation … page 12
  • 1.1 Indoor Unit … page 12
  • 1.2 Outdoor Unit … page 13
  • 2. Main Functions … page 14
  • 2.1 QUATERNITY Drying Operation … page 14
  • 2.2 Comfort Sleep Operation … page 16
  • 2.3 Automatic Operation … page 18
  • 2.4 Comfort Airflow Mode … page 19
  • 2.5 Cooling Breeze Operation … page 20
  • 2.6 Power-airflow Dual FlapsFins … page 21
  • 2.7 Wide-angle LouversFins … page 21
  • 2.8 3-D Airflow … page 22
  • 2.9 POWERFUL Operation … page 23
  • 2.10 Indoor Unit Quiet Operation … page 23
  • 2.11 Multi-colored Indicator Lamp … page 24
  • 2.12 Monitor Brightness Setting … page 24
  • 2.13 Information Display … page 25
  • 2.14 Mold-Proof Stick … page 26
  • 2.15 FLASH STREAMER AIR PURIFYING
    Operation … page 27
  • 2.16 Wipe-clean Flat Panel … page 29
  • 2.17 Filter Cleaning Indicator
    (Remote Controller) … page 30
  • 2.18 TIMER Operation … page 30
  • 2.19 Night Set Mode … page 31
  • 2.20 Table for Special Modes … page 32
  • 2.21 Thermostat Control … page 33
  • 2.22 Fan Speed Control for Indoor
    Units … page 34
  • 2.23 Draft Prevention (Hot-Start) … page 36
  • 3. Control Specification … page 37
  • 3.1 Frequency Control … page 37
  • 3.2 Preheating Operation (Quick Warming
    Function) … page 38
  • 3.3 Four Way Valve Operation … page 38
  • 3.4 Compressor Start-up Protection … page 39
  • 3.5 Fan Speed Control for Outdoor Unit … page 40
  • 3.6 Fin Thermistor Control … page 41
  • 3.7 Input Current Control … page 41
  • 3.8 Peak-cut Control … page 42
  • 3.9 Indoor Heat Exchanger Freeze-up
    rotection … page 43
  • 3.10 Dew Prevention … page 44
  • 3.11 Liquid Compression Protection 2 … page 45
  • 3.12 Discharge Pipe Temperature
    Control … page 45
  • 3.13 Automatic Defrosting … page 46
  • 3.14 Electronic Expansion Valve
    Control … page 47
  • System Configuration … page 53

  • 1. Installation Manual … page 54
  • 1.1 Indoor Units … page 54
  • 1.2 Outdoor Units … page 64
  • 2. System Configuration … page 70
  • 3. Instruction … page 71
  • 3.1 Remote Controller … page 71
  • 3.2 Cooling · QUATERNITY DRYING
    Operation … page 73
  • 3.3 Heating Operation … page 74
  • 3.4 AUTO Operation … page 75
  • 3.5 FLASH STREAMER AIR PURIFYING ·
    POWERFUL Operation … page 76
  • 3.6 Adjusting Airflow Direction ·
    Airflow Rate … page 77
  • 3.7 COMFORT AIRFLOW · COOLING BREEZE
    Operation … page 78
  • 3.8 TIMER Operation … page 79
  • 3.9 COMFORT SLEEP Operation … page 80
  • 3.10 SET UP · CHILD PROOF LOCK … page 81
  • 3.11 INFORMATION DISPLAY … page 82
  • Service Diagnosi … page 83

  • 1. Convenient Service Check Function … page 85
  • 2. Troubleshooting … page 87
  • 2.1 Error Code Indication by Remote
    Controller … page 87
  • 2.2 Air conditioner does not run. … page 88
  • 2.3 Air conditioner runs but does
    not cool or heat … page 91
  • 2.4 When operation starts, safety
    breaker trips … page 93
  • 2.5 Air conditioner makes a loud
    sound and vibrates … page 95
  • 2.6 Indoor Unit PCB Abnormality … page 96
  • 2.7 Peak-cut Control or Freeze-up
    Protection … page 97
  • 2.8 Fan Motor System (DC Motor)
    Abnormality … page 99
  • 2.9 Streamer Unit Abnormality … page 101
  • 2.10 Thermistor System Abnormality … page 103
  • 2.11 Front Panel Open / Close
    Abnormality … page 104
  • 2.12 Humidity Sensor Abnormality … page 105
  • 2.13 Signal Transmission Error (Indoor
    Unit – Outdoor Unit) … page 106
  • 2.14 Incompatible Power Supply between
    Indoor Unit and Outdoor Unit … page 108
  • 2.15 Outdoor Unit PCB Abnormality … page 109
  • 2.16 OL Activation (Compressor Overload) … page 110
  • 2.17 Compressor Lock … page 111
  • 2.18 DC Fan Lock … page 112
  • 2.19 Input Overcurrent Detection … page 113
  • 2.20 Four-Way Valve Abnormality … page 115
  • 2.21 Discharge Pipe Temperature
    Control … page 117
  • 2.22 High Pressure Control in Cooling … page 118
  • 2.23 Compressor Sensor System
    Abnormality … page 120
  • 2.24 Position Sensor Abnormality … page 121
  • 2.25 DC Voltage / DC Current Sensor
    Abnormality … page 123
  • 2.26 Thermistor System Abnormality … page 124
  • 2.27 Abnormal Temperature in
    Electrical Box … page 126
  • 2.28 Temperature Rise in Radiation
    Fin … page 128
  • 2.29 Output Overcurrent … page 130
  • 2.30 Insufficient Gas … page 132
  • 2.31 Over Voltage Protection / Low Voltage
    Protection … page 134
  • 2.32 Outdoor Unit PCB Abnormality or Communication
    Circuit Abnormality … page 135
  • 2.33 Signal Transmission Error on Outdoor
    Unit PCB … page 138
  • 2.34 Lights-out of Microcomputer
    Status Lamp … page 140
  • 3. Check … page 141
  • 3.1 Thermistor Resistance Check … page 141
  • 3.2 Installation Condition Check … page 142
  • 3.3 Outdoor Fan System Check (DC Motor) … page 142
  • 3.4 Power Supply Waveform Check … page 143
  • 3.5 Main Circuit Electrolytic Capacitor
    Check … page 143
  • 3.6 Refrigerant System Check … page 144
  • 3.7 “Inverter Checker” Check … page 145
  • 3.8 Power Transistor Check … page 146
  • 3.9 Discharge Pressure Check … page 147
  • 3.10 Electronic Expansion Valve Check … page 148
  • 3.11 Indoor Unit PCB Output Check … page 149
  • 3.12 Rotating Pulse Input on Outdoor
    Unit PCB Check … page 150
  • 3.13 Humidity Sensor Check … page 151
  • 3.14 Main Circuit Short Check … page 151
  • 3.15 Four-Way Valve Performance Check … page 152
  • 3.16 Solenoid Valve for Dehumidification
    Check … page 153
  • Removal Procedure … page 155

  • 1. Indoor Unit … page 156
  • 1.1 Removal of Air Filters / Front panel … page 156
  • 1.2 Removal of Upper Panel … page 163
  • 1.3 Removal of Front Grille … page 166
  • 1.4 Removal of Assembly of Open/Close
    Mechanism … page 169
  • 1.5 Removal of Assembly of Reduction
    Motor … page 171
  • 1.6 Removal of Electrical Box … page 174
  • 1.7 Removal of PCB … page 179
  • 1.8 Removal of Dehumidifying Solenoid
    Valve Coil … page 185
  • 1.9 Removal of Drain Hose … page 186
  • 1.10 Removal of Swing Motor … page 188
  • 1.11 Removal of Heat Exchanger … page 190
  • 1.12 Removal of Propeller Fan /
    Fan Motor … page 193
  • 1.13 Removal of Horizontal Blades
    / Vertical Blades … page 196
  • 1.14 Removal of Streamer Unit … page 199
  • 2. Outdoor Unit … page 203
  • 2.1 How to Check the Service Monitor
    (LED A) … page 203
  • 2.2 Removal of Propeller Fan / Fan
    Motor … page 205
  • 2.3 Removal of Electrical Box … page 210
  • 2.4 Removal of PCB … page 214
  • 2.5 Removal of Sound Blanket … page 218
  • 2.6 Removal of Thermistor Assembly … page 220
  • 2.7 Removal of Reactor / Partition
    Plate … page 222
  • 2.8 Removal of Four Way Valve … page 224
  • 2.9 Removal of the Expansion Valve … page 226
  • 2.10 Removal of Compressor … page 228
  • Others Additional Information … page 231

  • 1. Additional Information … page 232
  • 1.1 Trial Operation … page 232
  • 1.2 Field Setting … page 233
  • 1.3 Application of Silicon Grease to
    a Power Transistor and a Diode Bridge … page 234
  • Appendix … page 235

  • 1. Piping Diagrams … page 236
  • 1.1 Indoor Units … page 236
  • 1.2 Outdoor Units … page 236
  • 2. Wiring Diagrams … page 237
  • 2.1 Indoor Units … page 237
  • 2.2 Outdoor Units … page 237
  • Index …