Daikin FTXG25JV1BW - Service Manual

Daikin FTXG25JV1BW

242 pages

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Service

Manual

[Applied Models]

z Inverter Pair : Heat Pump

Inverter Pair

Wall Mounted Type J-Series

SiBE041012_A

Table of Contents

Table of Contents3
Introduction7
- Safety Cautions7
- Used Icons11
Part 1 List of Functions12
Functions13
Part 2 Specifications15
Specifications16
Part 3 Printed Circuit Board Connector Wiring Diagram21
Indoor Unit22
Outdoor Unit25
- Rxg25/35J2V1B, Rxg25/35K2V1B25
- Rxg50K2V1B27
Part 4 Function and Control29
Main Functions30
- Temperature Control30
- Frequency Principle30
- Operation Starting Control32
- Airflow Direction Control33
- Fan Speed Control for Indoor Unit34
- Program Dry Operation35
- Automatic Operation36
- Thermostat Control37
- NIGHT SET Mode38
- ECONO Operation39
- INTELLIGENT EYE Operation40
- Inverter POWERFUL Operation41
- Other Functions43
Function of Thermistor44
Control Specification45
- Mode Hierarchy45
- Frequency Control46
- Controls at Mode Changing / Start-Up48
- Compressor Protection Function49
- Discharge Pipe Temperature Control50
- Input Current Control51
- Freeze-Up Protection Control52
- Heating Peak-Cut Control52
- Outdoor Fan Control53
- Liquid Compression Protection Function53
- Defrost Control54
- Outdoor Electronic Expansion Valve Control55
- Pressure Equalizing Control56
- Malfunctions58
Part 5 Operation Manual59
System Configuration60
Operation Manual61
- Name of Parts61
- Remote Controller63
- AUTO · DRY · COOL · HEAT · FAN Operation65
- Operating Conditions66
- Adjusting the Airflow Direction and Rate67
- COMFORT AIRFLOW Operation69
- INTELLIGENT EYE Operation70
- POWERFUL Operation72
- OUTDOOR UNIT QUIET Operation73
- ECONO Operation74
- During Operation74
- OFF TIMER Operation75
- ON TIMER Operation76
- WEEKLY TIMER Operation77
Part 6 Service Diagnosis83
Troubleshooting with LED85
- Indoor Unit85
- Outdoor Unit85
Problem Symptoms and Measures86
Service Check Function87
Troubleshooting90
- Error Codes and Description90
- Indoor Unit PCB Abnormality91
- Freeze-Up Protection Control or Heating Peak-Cut Control93
- Fan Motor (DC Motor) or Related Abnormality95
- Thermistor or Related Abnormality (Indoor Unit)97
- Front Panel Open / Close Fault98
- Signal Transmission Error (between Indoor Unit and Outdoor Unit)99
- Unspecified Voltage (between Indoor Unit and Outdoor Unit)101
- Outdoor Unit PCB Abnormality102
- OL Activation (Compressor Overload)104
- Compressor Lock105
- DC Fan Lock106
- Input Overcurrent Detection107
- Four Way Valve Abnormality108
- Discharge Pipe Temperature Control110
- High Pressure Control in Cooling111
- Compressor System Sensor Abnormality112
- Position Sensor Abnormality114
- DC Voltage / Current Sensor Abnormality (25/35 Class)117
- CT or Related Abnormality (50 Class)118
- Thermistor or Related Abnormality (Outdoor Unit)120
- Electrical Box Temperature Rise122
- Radiation Fin Temperature Rise124
- Output Overcurrent Detection126
- Refrigerant Shortage128
- Low-Voltage Detection or Over-Voltage Detection131
- Signal Transmission Error on Outdoor Unit PCB (50 Class Only)133
Check134
- Thermistor Resistance Check134
- Fan Motor Connector Check135
- Power Supply Waveforms Check135
- Electronic Expansion Valve Coil Check136
- Four Way Valve Performance Check137
- Inverter Unit Refrigerant System Check137
- Inverter Checker" Check138
- Rotation Pulse Check on the Outdoor Unit PCB140
- Installation Condition Check141
- Discharge Pressure Check141
- Outdoor Fan System Check142
- Main Circuit Short Check142
- Capacitor Voltage Check143
- Power Module Check143
Part 7 Removal Procedure144
Indoor Unit145
- Removal of Air Filters / Front Panel145
- Removal of Horizontal Blades149
- Removal of Front Grille151
- Removal of Front Panel Mechanism ASSY154
- Removal of Display Lens ASSY156
- Removal of Reduction Motor / Limit Switch157
- Removal of Fan Guards / Electrical Box159
- Removal of Pcbs162
- Removal of Swing Motors168
- Removal of Indoor Heat Exchanger169
- Removal of Fan Rotor / Fan Motor172
- Removal of Vertical Blade Assys175
Outdoor Unit - 25/35 Class176
- Removal of Outer Panels / Fan Motor176
- Removal of Electrical Box185
- Removal of Pcbs188
- Removal of Reactor / Partition Plate196
- Removal of Sound Blankets198
- Removal of Four Way Valve200
- Removal of Compressor203
Outdoor Unit - 50 Class205
- Removal of Outer Panels205
- Removal of Outdoor Fan / Fan Motor209
- Removal of Electrical Box213
- Removal of Pcbs218
- Removal of Sound Blankets / Thermistors221
- Removal of Four Way Valve223
- Removal of Electronic Expansion Valve224
- Removal of Compressor225
Part 8 Trial Operation and Field Settings228
Pump down Operation229
Forced Cooling Operation230
Trial Operation232
Field Settings233
- When 2 Units Are Installed in 1 Room233
- Standby Electricity Saving234
- Jumper and Switch Settings234
Application of Silicon Grease to a Power Transistor and a Diode Bridge235
Part 9 Appendix236
Piping Diagrams237
- Indoor Unit237
- Outdoor Unit237
Wiring Diagrams239
- Indoor Unit239
- Outdoor Unit239

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