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Daikin
Air Conditioner
FLKS25BAVMB
Daikin FLKS25BAVMB User Manual
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SiENBE05-722_A
Service
Manual
Inverter Pair
Floor/Ceiling Suspended Dual Type
BA-Series
[Applied Models]
Inverter Pair
: Cooling only
Inverter Pair: Heat Pump
2
Table of Contents
Default Chapter
4
Table of Contents
4
Introduction
7
Safety Cautions
7
Used Icons
11
Part 1 List of Functions
12
Functions
13
Part 2 Specifications
16
Specifications
17
Cooling Only
17
Heat Pump
20
Part 3 Printed Circuit Board Connector Wiring Diagram
23
Printed Circuit Board Connector Wiring Diagram
24
Indoor Unit
24
Outdoor Unit
26
Part 4 Function and Control
32
Main Functions
33
Temperature Control
33
Frequency Principle
33
Airflow Direction Control
35
Fan Speed Control for Indoor Units
36
Program Dry Operation
37
Automatic Operation
38
Thermostat Control
39
NIGHT SET Mode
40
HOME LEAVE Operation
41
Inverter POWERFUL Operation
42
Other Functions
43
Function of Thermistor
44
Control Specification
45
Mode Hierarchy
45
Frequency Control
46
Controls at Mode Changing / Start-Up
48
Compressor Protection Function
49
Discharge Pipe Temperature Control
50
Input Current Control
51
Freeze-Up Protection Control
52
Heating Peak-Cut Control
52
Outdoor Fan Control
53
Liquid Compression Protection Function
53
Defrost Control
54
Electronic Expansion Valve Control
55
Malfunctions
58
Forced Operation Mode
59
Standby Electricity Saving
59
Part 5 Operation Manual
60
System Configuration
61
Operation Manual
62
Remote Control
62
Auto Dry Cool Heat Fan Operation
63
AUTO · DRY · COOL · HEAT · FAN Operation
63
Adjusting the Airflow Direction
65
POWERFUL Operation
67
OUTDOOR UNIT QUIET Operation
68
HOME LEAVE Operation
69
TIMER Operation
71
Part 6 Service Diagnosis
73
Caution for Diagnosis
74
Troubleshooting with LED
74
Problem Symptoms and Measures
75
ARC433 Series
76
Troubleshooting
79
Error Codes and Description
79
Indoor Unit PCB Abnormality
80
Freeze-Up Protection Control or Heating Peak-Cut Control
81
Fan Motor (AC Motor) or Related Abnormality
83
Thermistor or Related Abnormality (Indoor Unit)
84
Signal Transmission Error (between Indoor Unit and Outdoor Unit)
85
Unspecified Voltage (between Indoor Unit and Outdoor Unit)
86
Outdoor Unit PCB Abnormality
87
OL Activation (Compressor Overload)
88
Compressor Lock
89
DC Fan Lock
90
Input Overcurrent Detection
91
Four Way Valve Abnormality
92
Discharge Pipe Temperature Control
94
High Pressure Control in Cooling
95
Compressor System Sensor Abnormality
96
Position Sensor Abnormality
97
DC Voltage / Current Sensor Abnormality
99
Thermistor or Related Abnormality (Outdoor Unit)
100
Electrical Box Temperature Rise
102
Radiation Fin Temperature Rise
105
Output Overcurrent Detection
108
Refrigerant Shortage
110
Low-Voltage Detection or Over-Voltage Detection
112
Check
114
How to Check
114
Four Way Valve Performance Check
115
Thermistor Resistance Check
116
Installation Condition Check
117
Discharge Pressure Check
117
Outdoor Fan System Check
118
Power Supply Waveforms Check
118
Power Module Check
119
Rotation Pulse Check on the Outdoor Unit Pcb
120
Hall IC Check
121
Main Circuit Short Check
121
Part 7 Removal Procedure
123
Indoor Unit
124
Removal of Air Filter / Front Grille
124
Removal of Front Panel
127
Removal of Horizontal Blade
129
Removal of Signal Receiver Unit / Swing Motor
130
Removal of Discharge Grille
131
Removal of Drain Pan
132
Removal of Electrical Box / PCB
133
Removal of Fan Rotor / Fan Motor
136
Removal of Indoor Heat Exchanger
138
Outdoor Unit - RK(X)S25/35E2V1B
140
Removal of Outer Panels / Fan Motor
140
Removal of Electrical Box
148
Removal of PCB
152
Removal of Reactor / Partition Plate
154
Removal of Sound Blanket
156
Removal of Four Way Valve
158
Removal of Compressor
161
Outdoor Unit - RK(X)S25/35G2V1B
163
Removal of Outer Panels / Fan Motor
163
Removal of Electrical Box
172
Removal of Thermistors
176
Removal of PCB
178
Removal of Reactor / Partition Plate
181
Removal of Sound Blanket
183
Removal of Four Way Valve
184
Removal of Compressor
187
Outdoor Unit - RK(X)S25/35G2V1B9
189
Removal of Outer Panels / Fan Motor
189
Removal of Electrical Box
198
Removal of PCB
201
Removal of Reactor / Partition Plate
209
Removal of Sound Blanket
211
Removal of Four Way Valve
213
Removal of Compressor
216
Part 8 Trial Operation and Field Settings
218
Trial Operation
219
Field Settings
220
When 2 Units Are Installed in 1 Room
220
Standby Electricity Saving
221
Facility Setting Jumper (Cooling at Low Outdoor Temperature)
222
Jumper and Switch Settings
223
Application of Silicon Grease to a Power Transistor and a Diode Bridge
224
Part 9 Appendix
226
Piping Diagrams
227
Indoor Unit
227
Outdoor Unit
228
Wiring Diagrams
230
Indoor Unit
230
Outdoor Unit
230
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Technical Data
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Daikin FLKS25BAVMB Specifications
General
Cooling Capacity
2.5 kW
Heating Capacity
3.2 kW
Refrigerant
R32
Type
Split System
Power Supply
220-240V / 50Hz
Noise Level (Indoor Unit)
19 dB(A)
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