Daikin FTXS20K2V1B - Service Manual

Daikin FTXS20K2V1B

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Service

Manual

Inverter Pair

Wall Mounted Type K-Series

SiBE041134

[Applied Models]

z Inverter Pair : Heat Pump

Table of Contents

Table of Contents3
Introduction6
- Safety Cautions6
- Used Icons10
Part 1 List of Functions11
Functions12
Part 2 Specifications13
Specifications14
Part 3 Printed Circuit Board Connector Wiring Diagram15
Indoor Unit16
Outdoor Unit18
Part 4 Function and Control20
Main Functions21
- Temperature Control21
- Frequency Principle21
- Airflow Direction Control23
- Fan Speed Control for Indoor Unit24
- Program Dry Operation25
- Automatic Operation26
- Thermostat Control27
- NIGHT SET Mode28
- ECONO Operation29
- INTELLIGENT EYE Operation30
- Inverter POWERFUL Operation31
- Other Functions32
Function of Thermistor33
Control Specification34
- Mode Hierarchy34
- Frequency Control35
- Controls at Mode Changing / Start-Up37
- Discharge Pipe Temperature Control38
- Input Current Control39
- Freeze-Up Protection Control40
- Heating Peak-Cut Control40
- Outdoor Fan Control41
- Liquid Compression Protection Function41
- Defrost Control42
- Electronic Expansion Valve Control43
- Pressure Equalizing Control44
- Malfunctions46
Part 5 Operation Manual47
System Configuration48
Operation Manual49
- Remote Controller49
  - Quiet Button50
  - Clock Button50
- AUTO · DRY · COOL · HEAT · FAN Operation51
- Operating Conditions52
- Adjusting the Airflow Direction and Rate53
- COMFORT AIRFLOW Operation55
- INTELLIGENT EYE Operation56
- POWERFUL Operation58
- OUTDOOR UNIT QUIET Operation59
- ECONO Operation60
- OFF TIMER Operation61
- ON TIMER Operation62
- WEEKLY TIMER Operation63
- Copy Mode66
Part 6 Service Diagnosis69
Troubleshooting with LED70
- Indoor Unit70
- Outdoor Unit70
Problem Symptoms and Measures71
Service Check Function72
Troubleshooting75
- Error Codes and Description75
- Indoor Unit PCB Abnormality76
- Freeze-Up Protection Control or Heating Peak-Cut Control78
- Fan Motor (DC Motor) or Related Abnormality80
- Thermistor or Related Abnormality (Indoor Unit)82
- Refrigerant Shortage83
- Low-Voltage Detection or Over-Voltage Detection85
- Signal Transmission Error (between Indoor Unit and Outdoor Unit)87
- Unspecified Voltage (between Indoor Unit and Outdoor Unit)89
- Outdoor Unit PCB Abnormality90
- OL Activation (Compressor Overload)91
- Compressor Lock92
- DC Fan Lock93
- Input Overcurrent Detection94
- Four Way Valve Abnormality95
- Discharge Pipe Temperature Control97
- High Pressure Control in Cooling98
- Compressor System Sensor Abnormality99
- Position Sensor Abnormality100
- DC Voltage / Current Sensor Abnormality102
- Thermistor or Related Abnormality (Outdoor Unit)103
- Electrical Box Temperature Rise105
- Radiation Fin Temperature Rise107
- Output Overcurrent Detection109
Check111
- Thermistor Resistance Check111
- Fan Motor Connector Output Check112
- Power Supply Waveforms Check112
- Electronic Expansion Valve Check113
- Four Way Valve Performance Check114
- Inverter Units Refrigerant System Check114
- Inverter Checker" Check115
- Rotation Pulse Check on the Outdoor Unit PCB116
- Installation Condition Check117
- Discharge Pressure Check117
- Outdoor Fan System Check118
- Main Circuit Short Check118
- Power Module Check119
Part 7 Removal Procedure120
Indoor Unit121
- Removal of Air Filters121
- Removal of Horizontal Blade123
- Removal of Front Panel125
- Removal of Front Grille126
- Removal of Vertical Blade Assys127
- Removal of Electrical Box129
- Removal of Swing Motor / Pcbs132
- Removal of Indoor Heat Exchanger137
- Removal of Fan Rotor / Fan Motor140
- Exchange of Piping Direction (Drain Hose)143
Outdoor Unit144
- Removal of Outer Panels / Fan Motor144
- Removal of Electrical Box153
- Removal of Pcbs156
- Removal of Reactor / Partition Plate164
- Removal of Sound Blankets166
- Removal of Four Way Valve168
- Removal of Compressor171
Part 8 Trial Operation and Field Settings173
Pump down Operation174
Forced Cooling Operation175
Trial Operation176
Field Settings177
- Model Type Setting177
- When 2 Units Are Installed in 1 Room177
- Standby Electricity Saving178
- Facility Setting Jumper (Cooling at Low Outdoor Temperature)178
- Jumper Settings179
Application of Silicon Grease to a Power Transistor and a Diode Bridge180
Part 9 Appendix181
Piping Diagrams182
- Indoor Unit182
- Outdoor Unit182
Wiring Diagrams183
- Indoor Unit183
- Outdoor Unit183

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