Daikin RX20JV1B - Revision History

Daikin RX20JV1B

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Revision History

Month / Year Version Revised contents

03 / 2010 SiBE041010 First edition

06 / 2013 SiBE041010EA

Model addition: FTX20/25/35J2V1B, ATX20/25/35J2V1B, RX20/25/35J3V1B,

ARX20/25/35J3V1B

Table of Contents

Table of Contents3
Introduction6
- Safety Cautions6
- Used Icons11
Part 1 List of Functions12
Functions13
Part 2 Specifications15
Specifications16
Part 3 Printed Circuit Board Connector Wiring Diagram24
Indoor Unit25
Outdoor Unit27
Part 4 Function and Control29
Main Functions30
- Temperature Control30
- Frequency Principle30
- Airflow Direction Control32
- Fan Speed Control for Indoor Unit33
- Program Dry Operation34
- Automatic Operation35
- Thermostat Control36
- NIGHT SET Mode37
- ECONO Operation37
- Inverter POWERFUL Operation38
- Clock Setting38
- Other Functions39
Function of Thermistor40
Control Specification41
- Mode Hierarchy41
- Frequency Control41
- Controls at Mode Changing / Start-Up43
- Discharge Pipe Temperature Control44
- Input Current Control45
- Freeze-Up Protection Control46
- Heating Peak-Cut Control46
- Outdoor Fan Control47
- Liquid Compression Protection Function47
- Defrost Control48
- Electronic Expansion Valve Control49
- Pressure Equalizing Control50
- Malfunctions52
Part 5 Remote Controller53
Remote Controller54
Mode Button55
Part 6 Service Diagnosis56
Troubleshooting with LED57
- Indoor Unit57
- Outdoor Unit57
Problem Symptoms and Measures58
Service Check Function59
Troubleshooting62
- Error Codes and Description62
- Indoor Unit PCB Abnormality63
- Freeze-Up Protection Control or Heating Peak-Cut Control64
- Fan Motor (DC Motor) or Related Abnormality65
- Thermistor or Related Abnormality (Indoor Unit)67
- Refrigerant Shortage68
- Low-Voltage Detection or Over-Voltage Detection70
- Signal Transmission Error (between Indoor Unit and Outdoor Unit)72
- Unspecified Voltage (between Indoor Unit and Outdoor Unit)74
- Outdoor Unit PCB Abnormality75
- OL Activation (Compressor Overload)76
- Compressor Lock78
- DC Fan Lock79
- Input Overcurrent Detection80
- Four Way Valve Abnormality81
- Discharge Pipe Temperature Control83
- High Pressure Control in Cooling84
- Compressor System Sensor Abnormality85
- Position Sensor Abnormality86
- DC Voltage / Current Sensor Abnormality88
- Thermistor or Related Abnormality (Outdoor Unit)89
- Electrical Box Temperature Rise91
- Radiation Fin Temperature Rise92
- Output Overcurrent Detection94
Check96
- Thermistor Resistance Check96
- Fan Motor Connector Output Check97
- Power Supply Waveforms Check98
- Electronic Expansion Valve Check98
- Four Way Valve Performance Check99
- Inverter Units Refrigerant System Check99
- Inverter Analyzer Check100
- Rotation Pulse Check on the Outdoor Unit PCB101
- Installation Condition Check102
- Discharge Pressure Check102
- Outdoor Fan System Check103
- Main Circuit Short Check103
- Power Module Check104
Part 7 Tips for Servicing105
Tips for Servicing106
- Pump down Operation106
- Forced Cooling Operation106
Trial Operation107
Field Settings108
- When 2 Units Are Installed in 1 Room108
- Jumper Settings108
Silicon Grease on Power Transistor / Diode Bridge109
Part 8 Appendix110
Piping Diagrams111
- Indoor Unit111
- Outdoor Unit112
Wiring Diagrams113
- Indoor Unit113
- Outdoor Unit113
Removal Procedure (Booklet No.)114
Revision History115

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