Name: Daikin FTXN35KEV1B
Brand: Daikin
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SiBE041102_A Piping Diagrams

Appendix 143

1. Piping Diagrams

1.1 Indoor Unit

FTXN25/35KEV1B

INDOOR UNIT

HEAT EXCHANGER

7.0CuT

4.8CuT

7.0CuT

CROSS FLOW FAN

FIELD PIPING

(6.4CuT)

FAN MOTOR

9.5CuT

FIELD PIPING

(9.5CuT)

REFRIGERANT FLOW

COOLING

HEATING

THERMISTOR

ON HEAT EXCH.

4D065938B

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 Control19
Main Functions20
- Temperature Control20
- Frequency Principle20
- Airflow Direction Control22
- Fan Speed Control for Indoor Unit23
- Program Dry Operation24
- Automatic Operation25
- Thermostat Control26
- NIGHT SET Mode27
- ECONO Operation28
- Inverter POWERFUL Operation29
- Other Functions30
Function of Thermistor31
Control Specification32
- Mode Hierarchy32
- Frequency Control33
- Controls at Mode Changing / Start-Up35
- Discharge Pipe Temperature Control36
- Input Current Control37
- Freeze-Up Protection Control38
- Heating Peak-Cut Control38
- Outdoor Fan Control39
- Liquid Compression Protection Function39
- Defrost Control40
- Electronic Expansion Valve Control41
- Malfunctions44
Part 5 Operation Manual45
System Configuration46
Operation Manual47
- Remote Controller47
- AUTO·DRY·COOL·HEAT·FAN Operation48
- Adjusting the Airflow Direction50
- COMFORT AIRFLOW Operation52
- POWERFUL Operation53
- ECONO Operation54
- OFF TIMER Operation55
- ON TIMER Operation56
Part 6 Service Diagnosis57
Troubleshooting with LED58
- Indoor Unit58
- Outdoor Unit58
Problem Symptoms and Measures59
Service Check Function60
Troubleshooting63
- Error Codes and Description63
- Indoor Unit PCB Abnormality64
- Freeze-Up Protection Control or Heating Peak-Cut Control65
- Fan Motor (AC Motor) or Related Abnormality67
- Thermistor or Related Abnormality (Indoor Unit)69
- Signal Transmission Error (between Indoor Unit and Outdoor Unit)70
- Unspecified Voltage (between Indoor Unit and Outdoor Unit)72
- Outdoor Unit PCB Abnormality73
- OL Activation (Compressor Overload)74
- Compressor Lock75
- Input Overcurrent Detection76
- Four Way Valve Abnormality77
- Discharge Pipe Temperature Control79
- High Pressure Control in Cooling80
- Compressor System Sensor Abnormality81
- Position Sensor Abnormality82
- DC Voltage / Current Sensor Abnormality84
- Thermistor or Related Abnormality (Outdoor Unit)85
- Electrical Box Temperature Rise87
- Radiation Fin Temperature Rise89
- Output Overcurrent Detection91
- Refrigerant Shortage93
- Low-Voltage Detection or Over-Voltage Detection95
Check97
- Thermistor Resistance Check97
- Hall IC Check98
- Power Supply Waveforms Check98
- Electronic Expansion Valve Check99
- Four Way Valve Performance Check100
- Inverter Unit Refrigerant System Check100
- Inverter Checker" Check101
- Installation Condition Check102
- Discharge Pressure Check103
- Outdoor Fan System Check103
- Main Circuit Short Check104
- Power Module Check104
Part 7 Removal Procedure105
Indoor Unit106
- Removal of Air Filters106
- Removal of Horizontal Blade108
- Removal of Front Panel110
- Removal of Front Grille111
- Removal of Electrical Box / Vertical Blades112
- Removal of Swing Motor / Pcbs117
- Removal of Indoor Heat Exchanger121
- Removal of Fan Rotor / Fan Motor124
- Exchange of Drain Hose (Piping Direction)127
Outdoor Unit128
- Removal of Outer Panels128
- Removal of Outdoor Fan / Fan Motor130
- Removal of Electrical Box / PCB132
- Removal of Sound Blankets140
- Removal of Four Way Valve142
- Removal of Compressor145
Part 8 Trial Operation and Field Settings146
Pump down Operation147
Forced Cooling Operation148
Trial Operation149
Field Settings150
- When 2 Units Are Installed in 1 Room150
- Jumper Settings150
Application of Silicon Grease to a Power Transistor and a Diode Bridge151
Part 9 Appendix152
Piping Diagrams153
- Indoor Unit153
- Outdoor Unit154
Wiring Diagrams155
- Indoor Unit155
- Outdoor Unit156

Brand	Daikin
Model	FTXN35KEV1B
Category	Air Conditioner
Language	English

Daikin FTXN35KEV1B Service Manual

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