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FTXN12KEVJU
Daikin FTXN12KEVJU Service Manual
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Service
Manual
Inverter Pair
Wall Mounted Type K-Series
SiUS041111
[Applied Models]
Inverter Pair : Cooling Only
Inverter Pair : Heat Pump
2
Table of Contents
Default Chapter
3
Table of Contents
3
Safety Consideration
7
Part 1
9
List of Functions
9
Functions
10
Part 2
12
Specifications
12
Part
12
Specifications
13
Cooling Only
13
Heat Pump
16
Part 3
19
Printed Circuit Board Connector Wiring Diagram
19
Indoor Unit
20
09/12 Class
20
15/18/24 Class
22
Outdoor Unit
24
09/12 Class
24
15/18/24 Class
26
Part 4
28
Function and Control
28
Main Functions
29
Temperature Control
29
Frequency Principle
29
Airflow Direction Control
31
Fan Speed Control for Indoor Unit
32
Program Dry Operation
33
Automatic Operation
34
Thermostat Control
35
NIGHT SET Mode
36
ECONO Operation
37
Inverter POWERFUL Operation
38
Other Functions
39
Function of Thermistor
40
Control Specification
41
Mode Hierarchy
41
Frequency Control
42
Controls at Mode Changing / Start-Up
44
Compressor Protection Function
45
Discharge Pipe Temperature Control
47
Input Current Control
48
Freeze-Up Protection Control
49
Heating Peak-Cut Control
49
Outdoor Fan Control
50
Liquid Compression Protection Function
50
Defrost Control
51
Electronic Expansion Valve Control
53
Pressure Equalizing Control
54
Malfunctions
56
Part 5
57
Operation Manual
57
Part
57
System Configuration
58
12 Class
59
Remote Controller
59
AUTO · DRY · COOL · HEAT · FAN Operation
61
Operating Conditions
62
Adjusting the Airflow Direction and Rate
63
COMFORT AIRFLOW Operation
65
POWERFUL Operation
66
ECONO Operation
67
OFF TIMER Operation
68
ON TIMER Operation
69
18/24 Class
70
Remote Controller
70
AUTO · DRY · COOL · HEAT · FAN Operation
72
Adjusting the Airflow Direction and Rate
74
POWERFUL Operation
76
OFF TIMER Operation
77
ON TIMER Operation
78
Part 6
79
Service Diagnosis
79
Troubleshooting with LED
81
Indoor Unit
81
Outdoor Unit
81
Problem Symptoms and Measures
82
Service Check Function
83
Troubleshooting
86
Error Codes and Description
86
Indoor Unit PCB Abnormality
87
Freeze-Up Protection Control or Heating Peak-Cut Control
88
Fan Motor (DC Motor) or Related Abnormality
90
Thermistor or Related Abnormality (Indoor Unit)
93
Signal Transmission Error (between Indoor Unit and Outdoor Unit)
94
Unspecified Voltage (between Indoor Unit and Outdoor Unit)
96
Outdoor Unit PCB Abnormality
97
OL Activation (Compressor Overload)
98
Compressor Lock
99
DC Fan Lock
100
Input Overcurrent Detection
101
Four-Way Valve Abnormality
102
Discharge Pipe Temperature Control
104
High Pressure Control in Cooling
106
Compressor System Sensor Abnormality
108
Position Sensor Abnormality
109
DC Voltage / Current Sensor Abnormality (09/12 Class Only)
111
Thermistor or Related Abnormality (Outdoor Unit)
112
Electrical Box Temperature Rise
114
Radiation Fin Temperature Rise
116
Output Overcurrent Detection
118
Refrigerant Shortage
120
Low-Voltage Detection or Over-Voltage Detection
122
Check
124
Thermistor Resistance Check
124
Fan Motor Connector Output Check
125
Power Supply Waveforms Check
126
Electronic Expansion Valve Check
126
Four-Way Valve Performance Check
127
Inverter Unit Refrigerant System Check
127
Inverter Checker" Check
128
Rotation Pulse Check on the Outdoor Unit PCB
130
Installation Condition Check
131
Discharge Pressure Check
132
Outdoor Fan System Check
132
Main Circuit Short Check
133
Power Module Check
134
Part 7
135
Removal Procedure
135
Indoor Unit: 09/12 Class
136
Removal of Air Filters
136
Removal of Horizontal Blade
138
Removal of Front Panel
140
Removal of Front Grille
141
Removal of Electrical Box / Vertical Blades
142
Removal of Swing Motor / Pcbs
147
Removal of Indoor Heat Exchanger
151
Removal of Fan Rotor / Fan Motor
154
Exchange of Piping Direction (Drain Hose)
157
Indoor Unit: 15/18/24 Class
158
Removal of Air Filters / Front Panel
158
Removal of Front Grille
161
Part
162
Removal of Horizontal Blades / Vertical Blades
163
Removal of Electrical Box / Pcbs / Swing Motors
165
Removal of Indoor Heat Exchanger
170
Removal of Fan Motor / Fan Rotor
173
Outdoor Unit: 09/12 Class
175
Removal of Outer Panels
175
Removal of Outdoor Fan / Fan Motor
179
Removal of Electrical Box / PCB
181
Removal of Sound Blankets
193
Removal of Four-Way Valve
195
Removal of Compressor
198
Outdoor Unit: 15/18/24 Class
199
Removal of Outer Panels
199
Removal of Outdoor Fan / Fan Motor
202
Removal of Electrical Box
206
Removal of Pcbs
214
Removal of Sound Blankets
221
Removal of Electronic Expansion Valve Assemblyassy
224
Removal of Electronic Expansion Valve Assembly
224
Removal of Four-Way Valve
225
Removal of Compressor
226
Trial Operation and Field Settings
228
Part
228
Pump down Operation
229
Forced Cooling Operation
230
Trial Operation
231
Field Settings
232
Model Type Setting
232
Temperature Display Switch
232
When 2 Units Are Installed in 1 Room
233
Facility Setting Switch (Cooling at Low Outdoor Temperature)
234
Jumper Settings
235
Application of Silicon Grease to a Power Transistor and a Diode Bridge
236
Part 9
237
Appendix
237
Piping Diagrams
238
Indoor Unit
238
Outdoor Unit
239
Wiring Diagrams
241
Indoor Unit
241
Outdoor Unit
242
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Daikin FTXN12KEVJU Specifications
General
Cooling Capacity
3.5 kW
Heating Capacity
4.0 kW
Seasonal Energy Efficiency Ratio (SEER)
6.1
Type
Split
Power Supply
50 Hz
Refrigerant
R32
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