SkyAir H-Series Heat Pump and Cooling Only – Service-Manual

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

 

Cooling Only

Indoor Units: FTXS30HVJU ; FTXS36HVJU
Outdoor Units: RKS30HVJU; RKS36HVJU

 

Heat Pump

Indoor Units: FTXS30HVJU ; FTXS36HVJU
Outdoor Units: RXS30HVJU ; RXS36HVJU

 

CONTENTS:

    List of Functions … page 1

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

  • 1.Specifications … page 4
  • 1.1 Cooling Only / 60 Hz, 208 – 230 V … page 4
  • 1.2 Heat Pump / 60 Hz, 208 – 230 V … page 5
  • Printed Circuit Board
    Connector Wiring Diagram … Page 6

  • 1.Indoor Unit … page 7
  • 2.Outdoor Unit … page 10
  • Function and Control … page 12

  • 1.Main Functions … page 13
  • 1.1 Temperature Control … page 13
  • 1.2 Frequency Principle … page 13
  • 1.3 Airflow Direction Control … page 15
  • 1.4 Fan Speed Control for Indoor
    Unit … page 17
  • 1.5 Program Dry Operation … page 18
  • 1.6 Automatic Operation … page 19
  • 1.7 Thermostat Control … page 20
  • 1.8 NIGHT SET Mode … page 21
  • 1.9 ECONO Operation … page 22
  • 1.10 INTELLIGENT EYE Operation … page 23
  • 1.11 Inverter POWERFUL Operation … page 24
  • 1.12 Other Functions … page 25
  • 2.Function of Thermistor … page 26
  • 3.Control Specification … page 27
  • 3.1 Mode Hierarchy … page 27
  • 3.2 Frequency Control … page 28
  • 3.3 Controls at Mode Changing /
    Start-up … page 30
  • 3.4 Discharge Pipe Temperature
    Control … page 32
  • 3.5 Input Current Control … page 33
  • 3.6 Freeze-up Protection Control … page 34
  • 3.7 Heating Peak-cut Control … page 34
  • 3.8 Outdoor Fan Control … page 35
  • 3.9 Liquid Compression Protection
    Function … page 35
  • 3.10 Defrost Control … page 36
  • 3.11 Electronic Expansion Valve
    Control … page 37
  • 3.12 Malfunctions … page 40
  • Operation Manual … page 41

  • 1. System Configuration … page 42
  • 2. Operation Manual … page 43
  • 2.1 Remote Controller … page 43
  • 2.2 AUTO · DRY · COOL · HEAT ·
    FAN Operation … page 45
  • 2.3 Adjusting the Airflow Direction … page 47
  • 2.4 COMFORT AIRFLOW Operation … page 49
  • 2.5 INTELLIGENT EYE Operation … page 50
  • 2.6 POWERFUL Operation … page 52
  • 2.7 OUTDOOR UNIT QUIET Operation … page 53
  • 2.8 ECONO Operation … page 54
  • 2.9 TIMER Operation … page 55
  • 2.10 WEEKLY TIMER Operation … page 57
  • Service Diagnosis … page 64

  • 1. Troubleshooting with LED … page 66
  • 1.1 Indoor Unit … page 66
  • 1.2 Outdoor Unit … page 66
  • 2. Problem Symptoms and Measures … page 67
  • 3. Service Check Function … page 68
  • 4. Troubleshooting … page 71
  • 4.1 Error Codes and Description … page 71
  • 4.2 Indoor Unit PCB Abnormality … page 72
  • 4.3 Freeze-up Protection Control or Heating
    Peak-cut Control … page 73
  • 4.4 Fan Motor (DC Motor) or Related
    Abnormality … page 75
  • 4.5 Thermistor or Related Abnormality
    (Indoor Unit) … page 77
  • 4.6 Signal Transmission Error (between
    Indoor Unit and Outdoor Unit) … page 78
  • 4.7 Unspecified Voltage (between
    Indoor Unit and Outdoor Unit) … page 80
  • 4.8 Outdoor Unit PCB Abnormality … page 81
  • 4.9 OL Activation (Compressor
    Overload) … page 82
  • 4.10 Compressor Lock … page 83
  • 4.11 DC Fan Lock … page 84
  • 4.12 Input Overcurrent Detection … page 85
  • 4.13 Four Way Valve Abnormality … page 86
  • 4.14 Discharge Pipe Temperature Control … page 88
  • 4.15 High Pressure Control in Cooling … page 89
  • 4.16 Compressor System Sensor Abnormality … page 91
  • 4.17 Position Sensor Abnormality … page 93
  • 4.18 CT or Related Abnormality … page 95
  • 4.19 Thermistor or Related Abnormality
    (Outdoor Unit) … page 97
  • 4.20 Electrical Box Temperature Rise … page 99
  • 4.21 Radiation Fin Temperature Rise … page 101
  • 4.22 Output Overcurrent Detection … page 103
  • 4.23 Refrigerant Shortage … page 105
  • 4.24 Low-voltage Detection or Over-voltage
    Detection … page 107
  • 4.25 Signal Transmission Error on Outdoor
    Unit PCB … page 109
  • 5. Check … page 110
  • 5.1 Thermistor Resistance Check … page 110
  • 5.2 Fan Motor Connector Output Check … page 111
  • 5.3 Power Supply Waveforms Check … page 111
  • 5.4 Electronic Expansion Valve Check … page 112
  • 5.5 Four Way Valve Performance Check … page 113
  • 5.6 Inverter Unit Refrigerant System Check … page 113
  • 5.7 “Inverter Checker” Check … page 114
  • 5.8 Rotation Pulse Check on the Outdoor
    Unit PCB … page 116
  • 5.9 Installation Condition Check … page 117
  • 5.10 Discharge Pressure Check … page 118
  • 5.11 Outdoor Fan System Check … page 118
  • 5.12 Capacitor Voltage Check … page 119
  • 5.13 Power Module Check … page 119
  • Removal Procedure … page 120

  • 1. Indoor Unit … page 121
  • 1.1 Removal of Air Filters /
    Front Panel … page 121
  • 1.2 Removal of Front Grille … page 124
  • 1.3 Removal of Electrical Box … page 127
  • 1.4 Removal of PCBs … page 133
  • 1.5 Removal of Horizontal Blades /
    Vertical Blades / Swing Motors … page 140
  • 1.6 Removal of Fan Motor … page 148
  • 1.7 Removal of Indoor Heat Exchanger … page 151
  • 1.8 Removal of Fan Rotor … page 154
  • 2. Outdoor Unit … page 156
  • 2.1 Removal of Outer Panels … page 156
  • 2.2 Removal of Electrical Box … page 166
  • 2.3 Removal of PCBs … page 170
  • 2.4 Removal of Fan Motor … page 173
  • 2.5 Removal of Coils / Thermistors … page 174
  • 2.6 Removal of Sound Blankets … page 177
  • 2.7 Removal of Compressor … page 179
  • Trial Operation and
    Field Settings … page 181

  • 1. Pump Down Operation … page 182
  • 2. Forced Cooling Operation … page 183
  • 3. Trial Operation … page 184
  • 4. Field Settings … page 185
  • 4.1 Model Type Setting … page 185
  • 4.2 Temperature Display Switch … page 185
  • 4.3 When 2 Units are Installed in 1 Room … page 186
  • 4.4 Facility Setting Switch (cooling at
    low outdoor temperature) … page 187
  • 4.5 Jumper and Switch Settings … page 187
  • 5. Application of Silicon Grease to a Power
    Transistor and a Diode Bridge … page 188
  • Appendix … page 189

  • 1. Piping Diagrams … page 190
  • 1.1 Indoor unit … page 190
  • 1.2 Outdoor Unit … page 191
  • 2. Wiring Diagrams … page 192