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Air Conditioner
Airstage V series
Fujitsu Airstage V series User Manual
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Model :
AJ*126UBTF
100
101
107
105
102
1
10
106
08-08
104
1
1
1
1
12
237
239
Table of Contents
Default Chapter
1
Service Manual
1
Table of Contents
2
1 Test Run
6
Checking Items before Test Run
7
Test Run Method
9
Procedure
9
Turn Power on
9
Operation Check
9
Test Run from Outdoor PC Board
10
Test Run from Remote Controller
10
Standard Wired Remote Controller
10
Standard Wireless Remote Controller
10
Simple Remote Controller
11
Central Remote Controller
11
Test Run Control
12
When the Test Run Signal Is Transmitted from Standard Wired, Wireless Remote Controller, Simple Remote Controller and Central Remote Controller
12
When the Test Run Signal Is Transmitted from the Outdoor Unit
12
2 Function of Printed Circuit Board
13
PCB Layouts
14
Indoor Unit Control Circuit Board
14
Switch Position
14
Compact Wall Mounted Type
15
Outdoor Unit Control Circuit Board
16
Wired, Simple Remote Controller Circuit Board
17
Central Remote Controller Circuit Board
18
Network Convertor Circuit Board
19
Network Convertor (UTR-YLLA)
20
Signal Amplifier Circuit Board
21
Group Remote Controller Circuit Board
22
External Switch Controller Circuit Board
23
Microprocessor Function List
24
Indoor Unit
24
Outdoor Unit
27
Function and Setting of each Switch - Indoor Unit
28
SW1 Setting
28
SW2 Setting
28
Auto Restart Validity / Invalidity
28
SW3 Setting
29
SW4 Setting
30
SW5 Setting
30
Connected Outdoor Unit Series
30
Draft Prevention Setting Switch (Only for Cassette Type)
30
Rotary Switch Setting
31
SW6,7 Setting
31
SW8,9 Setting
31
External Input and Output
31
Function and Setting of each Switch - Indoor Unit (Compact Wall Mounted Type)
32
Wireless Remote Controller Custom Code Switch
33
Refrigerant Type
33
Indoor Unit Address Switch
33
Rotary Switch Settings
34
SW6 Setting - Indoor Unit Address Switch
34
SW7 Setting - Refrigerant Circuit Address Switch
34
SW9 Setting - Remote Controller Address Switch
34
Function and Setting of each Switch - Outdoor Unit
35
DIP Switch Setting
35
DIP SW Setting
36
Silent Operation Mode (Cooling Mode Only) (Setting for Master and Slave Unit)
36
Sequential Start Shift
36
Outdoor Unit Capacity Switch (Setting for each Unit. Never Change at the Site)
37
Number of Slave Unit
37
Error Reset (Setting for Master and Slave Unit)
37
Cooling Capacity Shift SW
38
Pipe Length Setting SW
38
System Type of the Outdoor Unit (Setting for Master and Slave Unit)
38
Indoor Unit Small Capacity Setting (Only for Master Unit)
38
Rotary Switch Setting (Setting for each Unit)
39
Set the Refrigerant Circuit Address
39
External Input and Output (Only for Master Unit)
39
Wired, Simple Remote Controller
40
Dual Remote Controller Setting
40
Group Control Setting
40
Model Setting
40
External Input Validity / Invalidity
41
External Input Select Edge / Pulse
41
Filter Sign Indication on / off
41
Central Remote Controller
41
Memory Backup Setting
42
SW42 Initial Setting Button
42
Network Convertor
43
DIP- SW103 (5, 6, 7, 8) Setting the Number of Connected Indoor Units
44
DIP-SW 107 Setting
44
DIP-SW 108 Setting
44
DIP-SW109 Setting
44
Signal Amplifier
45
Group Remote Controller
45
Set SW1 to on to Enable the Memory Backup
45
External Switch Controller
46
Delay-Time Setting
46
External Switch Controller and Remote Controller, or Dual External Switch Controllers Setting
46
Operation Mode Setting
47
Contact Input
47
Operation Conditions
47
DIP SW5-6 Setting Forbidden
48
External Input and Output - Indoor Unit
49
Control Input (Operation/Stop)
49
Output
50
External Input and Output - Indoor Unit (Compact Wall Mounted)
51
External Input and Output - Outdoor Unit
53
External Input and Output - Central Remote Controller/Pc Controller
54
Central Remote Controller / PC Controller
54
External Input and Output - Network Convertor
56
3 Inverter Control
58
DC Inverter Control Method
59
Inverter Block of Outdoor Unit
59
Voltage Conversion Chart
59
Basic Circuit of 3 Phase Inverter
60
PWM Control (General Consideration)
60
Rectangularwave Inverter
60
Sinewave Inverter (for V Series)
60
Circuit Description
61
Filter PCB
61
Current Transformer
61
IGBT (Insulated Gate Bipolar Transistor)
61
Power Relay & Resistor
61
Coil (Reactor)
61
Smoothing Capacitor
61
Outdoor Unit Operation Control
62
4 Outdoor Unit Operation Control
63
Input / Output List
63
Compressor Operation
64
Operation / Stop Condition
64
Capacity Control
64
Target Low-Pressure and High-Pressure Control
64
Frequency Range of Start,Stop,And Operation (for DC Inverter Scroll Compressor)
65
Oil Return Control
65
Compressor Sequence Operation
66
Fan Control
67
Cooling Operation
67
Heating Operation
67
Expansion Valve Control
68
Special Operation
68
Snow Falling Protection Fan Mode
68
Oil Recovery Operation
68
Oil Balance Operation
69
Pre-Heat Operation
70
Defrost Operation Control
71
Protective Function List
72
5 Indoor Unit Operation
74
"AUTO" Position
75
Dry Operation
75
Fan Control Info
75
Fan Speed Setting
75
Master Control
76
Operation Mode Control
76
Auto Changeover
76
"COOL" Position
77
"Heat" Position
77
"FAN" Position
77
Louver Control
78
Vertical Air Direction Adjustment
78
Horizontal Air Direction Adjustment
79
Swing Operation
79
About Vertical Airflow SWING Operation
80
To Select Horizontal Airflow SWING Operation
80
To Stop Horizontal Airflow SWING Operation
80
About Horizontal Airflow Swing Operation
80
Electronic Expansion Valve Control
81
Drain Pump Operation
81
Function
82
Auto Restart
82
Icing Protection Control
82
Oil Recovery Operation
82
Timer Control
83
Wireless Remote Controller
83
Program Timer
83
Sleep Timer
83
Group Remote Controller Info
85
Weekly Timer
85
Wired Remote Controller
87
To Start/Cancel the WEEKLY Timer Operation
88
To Set the DAY off (for a Holiday)
88
To Set the Temperature SET BACK Timer
89
To Start/ Cancel the Temperature SET BACK Timer Operation
89
6 Trouble Shooting
90
Indoor Unit Display Troubleshooting
91
Normal Operation Troubleshooting
91
Outdoor Unit Display Troubleshooting
92
Operation Not Trouble
93
Abnormal Operation Troubleshooting
94
Error Indication Flashing Pattern
94
Indoor Unit Display
94
Remote Controller Troubleshooting
95
Outdoor Unit Display
96
System Condition When Outdoor Unit Error Is Occurred
97
Trouble Level of System
97
How to Trouble Shoot from the Symptom
98
Trouble Shooting with Error Code (INDOOR UNIT)
99
Troubleshooting 1 - Indoor Unit Error Method: Model Information Error
99
Troubleshooting 2 - Indoor Unit Error Method: Power Frequency Abnormal
100
Troubleshooting 3 - Indoor Unit Error Method: EEPROM Access Abnormal
101
Troubleshooting 4 - Indoor Unit Error Method: Indoor Temperature Sensor Error
102
Troubleshooting 5 - Indoor Unit Error Method: Heat Exchanger Inlet Sensor Error
103
Troubleshooting 6 - Indoor Unit Error Method: Heat Exchanger Middle Sensor Error
104
Troubleshooting 7 - Indoor Unit Error Method: Water Drain Abnormal
105
Troubleshooting 8 - Indoor Unit Error Method: Indoor Unit Fan Motor Abnormal
106
Troubleshooting 10 - Indoor Unit Error Method: Standard Wired Token Error
107
Troubleshooting 9 - Indoor Unit Error Method: Standard Wired Remote Error
107
Troubleshooting 11 - Indoor Unit Error Method: Communication Error between Controller PCB and Transmission PCB
108
Troubleshooting 12 - Indoor Unit Error Method: Network Communication Error
109
Troubleshooting 12-A - Indoor Unit Error Method: Indoor Unit Number Shortage Error
110
Trouble Shooting with Error Code (OUTDOOR UNIT)
111
Troubleshooting 13 - OUTDOOR UNIT Error Method: Compressor 1 Abnormal (Inverter Compressor)
111
Troubleshooting 13 - OUTDOOR UNIT Error Method: Compressor 1 Abnormal (Constant Speed)
112
Troubleshooting 14 - OUTDOOR UNIT Error Method: Compressor 2 Abnormal (Constant Speed)
114
Troubleshooting 15 - OUTDOOR UNIT Error Method: Compressor 3 Abnormal (Constant Speed)
116
Troubleshooting 16 - OUTDOOR UNIT Error Method: Discharge Temperature 1 Error
118
Troubleshooting 17 - OUTDOOR UNIT Error Method: Discharge Temperature 2 Error
119
Troubleshooting 18 - OUTDOOR UNIT Error Method: Discharge Temperature 3 Error
120
Troubleshooting 19 - OUTDOOR UNIT Error Method: High Pressure Error
121
Troubleshooting 20 - OUTDOOR UNIT Error Method: Low Pressure Error
122
Troubleshooting 21 - OUTDOOR UNIT Error Method: Pump down Error
123
Troubleshooting 22 - OUTDOOR UNIT Error Method: Discharge Temp. Sensor 1 Error
124
Troubleshooting 23 - OUTDOOR UNIT Error Method: Discharge Temp. Sensor 2 Error
125
Troubleshooting 24 - OUTDOOR UNIT Error Method: Discharge Temp. Sensor 3 Error
126
Troubleshooting 25 - OUTDOOR UNIT Error Method: Heat Ex. Liquid Temp. Sensor Error
127
Troubleshooting 26 - OUTDOOR UNIT Error Method: RCV Liquid Surface Sensor 1 (Lower Limit) Error
128
Troubleshooting 27 - OUTDOOR UNIT Error Method: RCV Liquid Surface Sensor 2 (Middle Limit) Error
129
Troubleshooting 28 - OUTDOOR UNIT Error Method: RCV Liquid Surface Sensor 3 (Higher Limit) Error
130
Troubleshooting 29-1 - OUTDOOR UNIT Error Method: SC Heat Exchanger Outlet Temp Sensor Error
131
Troubleshooting 30 - OUTDOOR UNIT Error Method: Liquid Pipe Temp. Sensor 1 Error
132
Troubleshooting 31 - OUTDOOR UNIT Error Method: Liquid Pipe Temp. Sensor 2 Error
133
Troubleshooting 32 - OUTDOOR UNIT Error Method: Suction Gas Temp. Sensor Error
134
Troubleshooting 33 - OUTDOOR UNIT Error Method: Outdoor Temperature Sensor Error
135
Troubleshooting 34 - OUTDOOR UNIT Error Method: Discharge Pressure Sensor Error
136
Troubleshooting 35 - OUTDOOR UNIT Error Method: Suction Pressure Sensor Error
136
Troubleshooting 36 - OUTDOOR UNIT Error Method: Current Sensor Error (Only for Master Unit)
137
Troubleshooting 37 - OUTDOOR UNIT Error Method: Reverse Phase/Missing Phase Error
138
Troubleshooting 38 - OUTDOOR UNIT Error Method: Inverter Error (Only for Main Unit)
139
Troubleshooting 39 - OUTDOOR UNIT Error Method: EEPROM Access Error
140
Troubleshooting 40 - OUTDOOR UNIT Error Method: Inverter Start-Up Current Error (Only for Main Unit)
141
Troubleshooting 41 - OUTDOOR UNIT Error Method: Inverter Normal Current Error (Only for Main Unit)
142
Troubleshooting 42 - OUTDOOR UNIT Error Method: Inverter Communication Error (Only for Main Unit)
143
Troubleshooting 43 - OUTDOOR UNIT Error Method: Parallel Communication Error
144
Troubleshooting 44 - OUTDOOR UNIT Error Method: Communication Error between Outdoor Units
145
Troubleshooting 45 - OUTDOOR UNIT Error Method: Network Communication Error (Only for Main Unit)
146
Troubleshooting 46 - OUTDOOR UNIT Error Method: Main/Slave Unit Setting Error (Only for Slave Unit)
147
Troubleshooting 47 - OUTDOOR UNIT Error Method: Slave Unit Error (Only for Main Unit)
147
Troubleshooting 48 - OUTDOOR UNIT Error Method: Initial Setting Error
148
Troubleshooting 49 - OUTDOOR UNIT Error Method: 4-Way Valve Error
149
Troubleshooting 50 - OUTDOOR UNIT Error Method: All Compressors Abnormal of 1 Unit
150
Trouble Shooting with no Error Code
151
Troubleshooting 51: Indoor Unit - no Power
151
Troubleshooting 52: Outdoor Unit - no Power
152
Troubleshooting 53: no Operation (Power Is On)
153
Troubleshooting 54: no Cooling or no Heating
154
Troubleshooting 55: Abnormal Noise
155
Troubleshooting 56: Water Leaking
155
Trouble Shooting 57 - Error Contents: Power Supply Error
156
Trouble Shooting 58 - Error Contents: the Abnormality in Connection of Remote Controller Cable
156
Trouble Shooting for Optional Parts
156
Trouble Shooting 60 - Error Contents: Switch Operation Error
157
Trouble Shooting 60 - Error Contents: Transmission Error
157
Trouble Shooting 61 - Error Contents: Power Supply Error
158
Trouble Shooting 62 - Error Contents: Communication Error
158
Troubleshooting 63 - Error Contents: Address Setting Error
159
Troubleshooting 64 - Error Contents: Parallel Communication Error B
159
Troubleshooting 65 - Error Contents: Parallel Communication Error a
159
Troubleshooting 66 - Error Contents: Communication Error B
160
Troubleshooting 67 - Error Contents: Communication Error a
160
Troubleshooting 69 - Error Contents: PCB Error 2
161
Troubleshooting 70 - Error Contents: Communication Error with Group Remote Controller
162
Troubleshooting 71 - Error Contents: Communication Error with VRF System
163
Troubleshooting 72 - Error Contents: Software Error
164
Troubleshooting 73 - Error Contents: PCB Error 1
165
Troubleshooting 74 - Error Contents: PCB Error 2
165
Troubleshooting 75 - Error Contents: Communication Error with Standard Remote Controller
166
Troubleshooting 76 - Error Contents: Communication Error with Indoor Unit
167
Troubleshooting 77 - Error Contents: Communication Error with VRF System
168
Troubleshooting 78 - Error Contents: Software Error
169
Troubleshooting 79 - Error Contents: Indoor/Outdoor Unit Error
169
Troubleshooting 80 - Error Contents: PCB Error
170
Troubleshooting 81 - Error Contents: Connection Error
171
Troubleshooting 82 - Error Contents: Address Setting Error
171
Troubleshooting 83 - Error Contents: System Error
172
Troubleshooting 84 - Error Contents: Transmission Error
172
Troubleshooting 85 - Error Contents: Unit Not Detected
173
Service Information
174
Cooling Backup Operation
174
Backup Operation When Compressor of the Slave Unit 1 Is Defective
175
Heating Backup Operation
176
Backup Operation When Compressor of the Master Unit Is Defective
176
Backup Operation When the Compressor of the Slave Unit 1 Is Defective
177
Work Procedure after the Backup Operation
178
Refrigerant Shortage at the Backup Operation
178
Refrigerant Charging after the Compressor Replacement
178
Service Parts Information
179
Diagnosis Method of Compressor
179
Constant Speed Compressor
180
Inverter Compressor
181
Inverter PCB, Noise Filter PCB
182
Indoor Unit Electronic Expansion Valve (EEV)
183
Indoor Unit Electronic Expansion Valve (EEV1)
184
Indoor Unit Electronic Expansion Valve (EEV2)
185
Outdoor Unit Solenoid Valve (SV1, SV2, SV3, SV6, SV7, SV8, SV8-2, SV8-3)
186
Protection Function
186
Outdoor Unit Solenoid Valve (SV4,SV5)
187
Normal Operation
187
Protection Function
187
4-Way Valve
188
Indoor Unit Fan Motor
189
Check Point : ABYA12 / 14LATF
189
Check Point : ABYA18LATF
189
Check Point : ABYA24LATF
189
Check Point : ABYA30 / 36 / 45 / 54LATF
190
Check Point : AUXB07 / 09LATF
190
Check Point : AUXB12 / 14LATF
190
Check Point : AUXB18LATF
191
Check Point : AUYA20 / 25 / 30LJATF
191
Check Point : AUYA36 / 45 / 54LATF
191
Check Point : ARXB07 / 09LALF
192
Check Point : ARXB12 /14LALF
192
Check Point : ARXB18LALF
192
Check Point : ARXB25 / 30LATF
193
Check Point : ARXB36LATF, ARXA25 / 30LATF
193
Check Point : ARXB45LATF
193
Check Point : ARXA36 / 45LATF
194
Check Point : ARXC36LATF
194
Check Point : ARXC45 / 60LATF
194
Check Point : ARXC90LATF
195
Check Point : ASYA18 / 24 / 30LATF
195
Outdoor Unit Fan Motor
196
Check Point : AJ*126L / AJ*126U
196
Check Point : AJ*A90/72L / AJ*A90/72U
196
Resistor, Cement
197
Reactor
197
Diode Bridge (Mounted on Transistor PCB)
198
Appending Data (Unit)
199
Refrigerant Pipe System Diagram - Models: AJ *A72LBTF ,AJ*A90LBTF ,AJ*A72UBTF , AJ *A90UBTF
200
Refrigerant Pipe System Diagram - Models: AJ *126LBTF , AJ *126UBTF
202
Characteristics of Sensors
204
Pressure Sensor
204
Check Point of Replacing Pressure Sensor
204
Thermistor Resistance Values (Outdoor Unit Side)
205
Thermistor Resistance Values (Indoor Unit Side)
206
Wiring Diagram
207
Compact Cassette Type Wiring Diagram
207
Indoor Unit
207
Compact Duct Type Wiring Diagram
210
Low Static Pressure Duct Type Wiring Diagram
211
Duct Type Wiring Diagram
212
High Static Pressure Duct Type Wiring Diagram
213
Floor/Ceiling Type Wiring Diagram
215
Ceiling Type Wiring Diagram
216
Compact Wall Mounted Type (Comfort Model) Wiring Diagram
217
Wall Mounted Type Wiring Diagram
218
Ceiling Wall Type Wiring Diagram
219
Outdoor Unit Wiring Diagram
220
Outdoor Internal Layout
224
Control Box (Inverter) Layout (for AJ*126LBTF/ AJ*A90LBTF/ AJ*A72LBTF)
227
Control Box Layout (for AJ*126LATF)
227
Control Box Layout (for AJ*126UBTF)
228
Control Box Layout (for AJ*A90UBTF/ AJ*A72UBTF)
228
Model Designation
229
Disassembly Illustration and Parts List
230
Outdoor Unit Exploded View - Model: AJ*126LBTF
231
Outdoor Unit Exploded View - Model: AJ*126UBTF
237
Outdoor Unit Exploded View - Model: AJ*A90LBTF, AJ*A72LBTF
242
Outdoor Unit Exploded View - Model: AJ*A90UBTF, AJ*A72UBTF
248
Indoor Unit Exploded View - Models: AUXB07, AUXB09, AUXB12, AUXB14, AUXB18
253
Indoor Unit Exploded View - Models: UTG-UD*D-W
257
Indoor Unit Exploded View - Models: AU*A20, AU*A25, AU*A30
258
Indoor Unit Exploded View - Models: AU*A36, AU*A45, AU*A54
263
Indoor Unit Exploded View - Models: ARXB07, ARXB09
268
Indoor Unit Exploded View - Models: ARXB12, ARXB14, ARXB18
270
Indoor Unit Exploded View - Models: ARXB07, ARXB09, ARXB12, ARXB14, ARXB18
272
Indoor Unit Exploded View - Models: ARXB25, ARXB30, ARXB36, ARXB45, ARXA25, ARXA30, ARXA36, ARXA45
273
Indoor Unit Exploded View - Models: ARXC36, ARXC45, ARXC60
276
Indoor Unit Exploded View - Models: ARXC45, ARXC60
277
Indoor Unit Exploded View - Models: ARXC90
280
Indoor Unit Exploded View - Models: AB*A12, AB*A14, AB*A18, AB*A24
284
Indoor Unit Exploded View - Models: AB*A30, AB*A36, AB*A45, AB*A54
291
Indoor Unit Exploded View - Models: AB*A30/ AB*A36, AB*A45, AB*A54
293
Indoor Unit Exploded View - Models: AS*E07, AS*E09, AS*E12, AS*E14
297
Indoor Unit Exploded View - Models: AS*A18, AS*A24, AS*A30
300
Indoor Unit Exploded View - Models: AS*A18, AS*A24
303
Indoor Unit Exploded View - Models: AW*A07, AW*A09, AW*A12, AW*A14, AW*A18, AW*A24, AW*A30
305
Indoor Unit Exploded View - Models: AW*A07, AW*A09
309
Standard Accessories - Models: AUXB07, AUXB09, AUXB12, AUXB14, AUXB18
311
Standard Accessories - Models: UTG-UD*D-W
311
Standard Accessories - Models: AU*A20, AU*A25, AU*A30, AU*A36, AU*A45, AU*A54
312
Standard Accessories - Models: ARXB07, ARXB09, ARXB12, ARXB14, ARXB18
313
Standard Accessories - Models: ARXB25, ARXB30, ARXB36, ARXB45, ARXA25, ARXA30, ARXA36, ARXA45
314
Standard Accessories - Models: ARXC36, ARXC45, ARXC60
315
Standard Accessories - Models: ARXC90
316
Standard Accessories - Models: AB*A12, AB*A14, AB*A18, AB*A24
317
Standard Accessories - Models: AB*A30, AB*A36, AB*A45, AB*A54
318
Standard Accessories - Models: AS*E07, AS*E09, AS*E12, AS*E14
319
Standard Accessories - Models: AS*A18, AS*A24, AS*A30
320
Standard Accessories - Models: AW*A07, AW*A09, AW*A12, AW*A14, AW*A18, AW*A24, AW*A30
321
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Fujitsu Airstage V series Specifications
General
Brand
Fujitsu
Model
Airstage V series
Category
Air Conditioner
Language
English
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