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RXS20K3V1B
Daikin RXS20K3V1B User Manual
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Troubleshootin
g
SiBE041134
66
Servic
e Di
agn
osi
s
4.2
Indo
or Unit PCB Abno
rmalit
y
Remote
Controller
Display
A1
Method of
Malfunction
Detection
The system checks if the circuit works properly
within the microcomputer of the indoor uni
t.
Malfunction
Decision
Conditions
The system cannot set the internal settings.
Supposed
Causes
Wrong models interconnected
Defective indoor unit PCB
Disconnection of connector
Reduction of power supply voltage
75
77
Table of Contents
Table of Contents
3
Introduction
6
Safety Cautions
6
Used Icons
10
Part 1 List of Functions
11
Functions
12
Part 2 Specifications
13
Specifications
14
Part 3 Printed Circuit Board Connector Wiring Diagram
15
Indoor Unit
16
Outdoor Unit
18
Part 4 Function and Control
20
Main Functions
21
Temperature Control
21
Frequency Principle
21
Airflow Direction Control
23
Fan Speed Control for Indoor Unit
24
Program Dry Operation
25
Automatic Operation
26
Thermostat Control
27
NIGHT SET Mode
28
ECONO Operation
29
INTELLIGENT EYE Operation
30
Inverter POWERFUL Operation
31
Other Functions
32
Function of Thermistor
33
Control Specification
34
Mode Hierarchy
34
Frequency Control
35
Controls at Mode Changing / Start-Up
37
Discharge Pipe Temperature Control
38
Input Current Control
39
Freeze-Up Protection Control
40
Heating Peak-Cut Control
40
Outdoor Fan Control
41
Liquid Compression Protection Function
41
Defrost Control
42
Electronic Expansion Valve Control
43
Pressure Equalizing Control
44
Malfunctions
46
Part 5 Operation Manual
47
System Configuration
48
Operation Manual
49
Remote Controller
49
Quiet Button
50
Clock Button
50
AUTO · DRY · COOL · HEAT · FAN Operation
51
Operating Conditions
52
Adjusting the Airflow Direction and Rate
53
COMFORT AIRFLOW Operation
55
INTELLIGENT EYE Operation
56
POWERFUL Operation
58
OUTDOOR UNIT QUIET Operation
59
ECONO Operation
60
OFF TIMER Operation
61
ON TIMER Operation
62
WEEKLY TIMER Operation
63
Copy Mode
66
Part 6 Service Diagnosis
69
Troubleshooting with LED
70
Indoor Unit
70
Outdoor Unit
70
Problem Symptoms and Measures
71
Service Check Function
72
Troubleshooting
75
Error Codes and Description
75
Indoor Unit PCB Abnormality
76
Freeze-Up Protection Control or Heating Peak-Cut Control
78
Fan Motor (DC Motor) or Related Abnormality
80
Thermistor or Related Abnormality (Indoor Unit)
82
Refrigerant Shortage
83
Low-Voltage Detection or Over-Voltage Detection
85
Signal Transmission Error (between Indoor Unit and Outdoor Unit)
87
Unspecified Voltage (between Indoor Unit and Outdoor Unit)
89
Outdoor Unit PCB Abnormality
90
OL Activation (Compressor Overload)
91
Compressor Lock
92
DC Fan Lock
93
Input Overcurrent Detection
94
Four Way Valve Abnormality
95
Discharge Pipe Temperature Control
97
High Pressure Control in Cooling
98
Compressor System Sensor Abnormality
99
Position Sensor Abnormality
100
DC Voltage / Current Sensor Abnormality
102
Thermistor or Related Abnormality (Outdoor Unit)
103
Electrical Box Temperature Rise
105
Radiation Fin Temperature Rise
107
Output Overcurrent Detection
109
Check
111
Thermistor Resistance Check
111
Fan Motor Connector Output Check
112
Power Supply Waveforms Check
112
Electronic Expansion Valve Check
113
Four Way Valve Performance Check
114
Inverter Units Refrigerant System Check
114
Inverter Checker" Check
115
Rotation Pulse Check on the Outdoor Unit PCB
116
Installation Condition Check
117
Discharge Pressure Check
117
Outdoor Fan System Check
118
Main Circuit Short Check
118
Power Module Check
119
Part 7 Removal Procedure
120
Indoor Unit
121
Removal of Air Filters
121
Removal of Horizontal Blade
123
Removal of Front Panel
125
Removal of Front Grille
126
Removal of Vertical Blade Assys
127
Removal of Electrical Box
129
Removal of Swing Motor / Pcbs
132
Removal of Indoor Heat Exchanger
137
Removal of Fan Rotor / Fan Motor
140
Exchange of Piping Direction (Drain Hose)
143
Outdoor Unit
144
Removal of Outer Panels / Fan Motor
144
Removal of Electrical Box
153
Removal of Pcbs
156
Removal of Reactor / Partition Plate
164
Removal of Sound Blankets
166
Removal of Four Way Valve
168
Removal of Compressor
171
Part 8 Trial Operation and Field Settings
173
Pump down Operation
174
Forced Cooling Operation
175
Trial Operation
176
Field Settings
177
Model Type Setting
177
When 2 Units Are Installed in 1 Room
177
Standby Electricity Saving
178
Facility Setting Jumper (Cooling at Low Outdoor Temperature)
178
Jumper Settings
179
Application of Silicon Grease to a Power Transistor and a Diode Bridge
180
Part 9 Appendix
181
Piping Diagrams
182
Indoor Unit
182
Outdoor Unit
182
Wiring Diagrams
183
Indoor Unit
183
Outdoor Unit
183
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Daikin RXS20K3V1B Specifications
General
Brand
Daikin
Model
RXS20K3V1B
Category
Air Conditioner
Language
English
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