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Airstage VR-II Series
Fujitsu Airstage VR-II Series User Manual
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SERVICE MANUAL
208/230V 60Hz
2
Table of Contents
Default Chapter
1
Service Manual
1
Table of Contents
2
1 Test Run
5
Execution Procedure and Execution Precautions
7
Before Execution
7
Transmission Wire Installation Inspection
8
Check Items before Power on
9
Power Source Inspection Sheet
9
Indoor Unit Field Setting Inspection Sheet
10
Outdoor Unit Field Setting Inspection Sheet
10
Multi Type RB Unit
11
RB Unit Field Setting Inspection
11
Single Type RB Unit
11
Transmission Wire Installation Inspection Sheet
12
Piping Installation Inspection Sheet
15
3-Way Valve Opening Inspection Sheet
17
Refrigerant Charge Amount Inspection Sheet
17
Check Items after Power on
18
Error Indication Check Sheet
18
Overview of System Operation Check Procedure
18
Power Source Check Sheet
18
Installed Unit and Their Addresses Check Sheet
19
Transmission Line Connection Check
20
Operation Check Sheet
21
Test Run Operation
22
Switch Position
22
Test Run from Outdoor Unit PC Board
22
Test Run Setting
22
Standard Wired Remote Controller
23
Standard Wireless Remote Controller
23
Test Run from Remote Controller
23
Central Remote Controller
24
Detail Setting Screen
24
Setting Screen
24
Touch Panel Controller
24
2-Wire Type Wired Remote Controller
25
Main Manu Screen
25
Monitor Mode Screen
25
Test Run Screen
25
Ceiling Type
26
Compact Cassette Type
26
Compact Wall Mounted Type
26
Test Run Control
26
Field Setting and Monitor Mode List for Outdoor Unit
27
Field Setting / Function Setting for Indoor Unit
31
Field Setting / Function Setting for Outdoor Air Unit
33
2 Outdoor Unit Operation Control
34
Refrigerant Circuit
35
REFRIGERANT CIRCUIT for Outdoor Air Unit
36
Outdoor Air Unit
36
Input / Output List
37
Heat Recovery Operation Control
38
Operation Mode Selection and Controlling
38
Ompressor Operation
38
Operation / Stop Condition
38
Compressor Speed Control
39
Cold Start Start Process
39
Speed Range and Controlling
39
2 Outdoor Units
40
Capacity Control
40
Capacity of Compressor Operation
40
Target Low-Pressure and High-Pressure Control
40
Compressor Sequence Operation
41
Starting Sequence Condition
41
Cooling Main / Heating Main
42
Heat Exchanger Capacity Control
42
Heat Exchanger Capacity Shift Controlling
42
Operation Mode Selection and Controlling
42
Fan Control
43
Cooling / Cooling Main Operation
43
Heating / Heating Main Operation
44
Intermittent Fan Mode
44
Expansion Valve Control
45
The EEV Controls the Flow of Refrigerant
45
Special Operation
46
Oil Recovery Operation
46
Pre-Heat Operation
46
Defrost Operation Control
47
Defrosting End Condition
47
Defrosting Start Condition
47
All Compressors Sart the Operation in Defrosting
48
Operating State of each Part During Defrosting Operation
48
Low Noise Mode
49
Automatic Switching
49
Low Noise Mode and Operation Contents
49
Setting and Corresponding Operations
49
Operation Contents
50
Snow Falling Protection Fan Mode -Default Setting
50
Protective Function
51
Discharge Temperature Protection
51
Protection Controlling Range in Cooling Mode
52
Protection Controlling Range in Heating Mode
52
High Pressure Protection
53
Protection Controlling Range in Cooling Operaing Mode
54
Protection Controlling Range in Heating Operaing Mode
54
Low Pressure Protection
55
Protection Controlling Range in Cooling / Heating Operaing Mode
55
Heatsink Temperature Protection
56
Compressor Temperature Protection
56
Heat - Ex.1(2) Gas Temp. Abnormal Stop
56
Over Current Protection
57
Compressor Frequency Maximum Setting Protection
57
Compressor Compress Ratio Protection
57
Fan Motor, Motor Driver Abnormal Stop Protection
58
EEV Coil Abnormal Stop
58
Indoor Unit Operation
59
Fan Speed Setting
61
AUTO" Position
61
Dry Operation
61
Fan Operation
61
Fan Control
61
Master Control
62
Operation Mode Control
62
Cool, Dry and Heat Mode
62
Stop Mode
62
Priority Mode
63
Priority Mode Decision Methods
63
Opposite Operation Mode
63
Operation Mode Control for Outdoor Air Unit
64
Auto Changeover Heating / Cooling Operation
66
Function Available Indoor Unit
66
AUTO CHANGEOVER Operation
66
Cooling Operation for Outdoor Air Unit
67
Auto Changeover Cooling / Dry Operation
68
Custom Auto Heating / Cooling Operation
69
COOL" Position
70
HEAT" Position
70
"COOL" Position for Outdoor Air Unit
71
"HEAT" Position for Outdoor Air Unit
71
Louver Control
72
Adjusting the Direction of Air Circulation
72
Universal Floor/Ceiling Type
72
Cassette Type
72
Horizontal Air Direction Adjustment
73
Large Ceiling Type
73
Wall Mounted Type
73
Swing Operation
73
Instructions Are Applicable to "LARGE CEILING TYPE"
74
About Vertical Airflow SWING Operation
74
To Select Horizontal Airflow SWING Operation
74
To Stop Horizontal Airflow SWING Operation
74
Electronic Expansion Valve Control
75
Drain Pump Operation
75
Special Control
75
Room Temperature Control
75
DRAIN PUMP OPERATION for Outdoor Air Unit
76
Automatic Operatic Control
76
Discharge Airflow Temperature Control
76
When Starting up
76
Function
77
Auto Restart
77
Freeze Prevention Control
77
Oil Recovery Operation / Defrost Operation
77
Outdoor Temperature Protected Operation for Outdoor Air Unit
78
Cool Operation
78
Heat Operation
78
Position of Solenoid Coil
79
Position of Solenoid Valve
79
Rb Unit Operation
79
Single Type
79
Pcbs Layout
80
PCB Component
80
Solenoid Valve Controlling
81
Refrigerant Flow
81
Open / Close Operation in Operation
81
Open / Close Operation in Special Operation
81
4 Trouble Shooting
83
Normal Operation
85
Indoor Unit Display
85
Outdoor Unit Display
86
Abnormal Operation
87
Error Code Display
87
Indoor Unit Network Communication Error
87
Error Indication Flashing Pattern
88
ERROR Transition
88
Indoor Unit Display
88
Outdoor Unit Display
88
Remote Controller Display
89
Group Remote Controller
89
Wired Remote Controller
89
Trouble Shooting Index - Error Code List
90
Trouble Shooting Index - no Error Code
91
Trouble Level of System
92
Error Code Which Manual Error Release will be Required
92
System Condition When Outdoor Unit Error Is Occurred
92
Error History Mode
93
Check the Detail of the Error History
93
Select the Error History Number
93
Trouble Shooting with Error Code
94
Check Remote and Controller PCB
94
Check the Connection of Terminal
94
Check the Number Setting of Outdoor Units
97
Check the Power Supply
97
Noise, Momentary Open, Voltage Drop
97
OUTDOOR UNIT Error Method
97
Check Communication PCB
100
Check Controller PCB
100
Check if any Outside Cause such as Voltage Drop or Noise
100
Check the Connection
100
Check the Communication Line Connection
101
Check the Communication PCB
101
Check the Indoor Unit or RB Unit Power Supply
101
Check the Terminal Resistor Setting
101
Check Connection
102
Replace Communication PCB
102
Reset the Power
102
Transmission PCB Connection Error
102
INDOOR UNIT Error Method
103
Check Indoor Unit Controller PCB
104
Wire Installation
104
Wrong Rcgroup Setting
104
After Indoor Unit Auto Adress Setting
106
After RB Unit Auto Adress Setting
106
Check the Indoor Unit Number Connection
106
Check the Indoor Unit Power Supply
106
Check Noise, Momentary Open, Voltage Drop
107
Check Signal Amplifier Unit Power Supply
107
Check the Signal Amplifier Number Connection
107
Signal Amplifier Auto Address Error
107
Detective Actuators
108
Check Connection of Electric Components
110
Check Installation Condition
110
Check Outside Cause (Voltage Drop or Noise, Etc.)
110
Reset Power Supply
110
Check Connection of Connector
114
Inlet Air Temp. Sensor Error
114
Remove Connector and Check Sensor Resistance Value
114
Check Voltage of Controller PCB (DC5.0V)
115
Indoor Unit Heat Ex. Inlet Temp. Sensor Error
115
Heat Exchanger Outlet Temp. Sensor
116
Indoor Unit Controller PCB Circuit
116
Indoor Unit Heat Ex. Outlet Temp. Sensor Error
116
Check Rotation of Fan
117
Indoor Unit Fan Motor 1 Rotation Speed Error
117
Coil 1 (Expansion Valve ) Error
118
Indoor Unit Controller PCB
118
Check Drain Pipe Blockage
119
Check Drain Pipe Installation
119
Indoor Unit Controller PCB Circuit Float Switch
119
Indoor Unit Drain Pump Error
119
Outdoor Unit Main PCB
120
Outdoor Unit Reverse Phase, Missing Phase Wire Error
120
Outdoor Unit EEPROM Access Error
121
Inverters Communication Error
122
Noise
122
Turn the Power on Again
122
EEPROM Data Corrupted Error
123
Inverter Error
124
Inverter PCB
124
Inverter PCB Short Interruption
125
Outdoor Unit Transmission PCB Parallel Communication Error
127
Discharge Temp. Sensor 1
128
Discharge Temp. Sensor 1 Error
128
Check the Connector Connection and Cable Open
129
Check Voltage of Main PCB
129
Compressor Temp Sensor 1 Error
129
Heat Ex.1 Gas Temp Sensor Error
130
Heat Ex.1 Liquid Temp. Sensor
131
Heat Ex.2 Gas Temp Sensor Error
132
Heat Ex.2 Liquid Temp. Sensor
133
Outdoor Temp Sensor Error
134
Suction Gas Temp Sensor Error
135
Heat Sink Temp Sensor Error
136
Heat Sink Temp. Sensor
136
Sub-Cool Heat EX. Gas Outlet Temp Sensor Error
137
Liquid Pipe Temp. Sensor 1 Error
138
Liquid Pipe Temp. Sensor 2 Error
139
Current Sensor 1 Abnormal
140
Discharge Pressure Sensor Error
141
Suction Pressure Sensor
142
Suction Pressure Sensor Error
142
High Pressure Switch 1 Error
143
Inverter Compressor Start up Error
144
Trip Detection
145
Compressor Motor Loss of Synchronization
146
Fan Motor Defective
147
Fan Rotation State Check
147
Outdoor Unit Fan Motor Lock Error
147
Replace Driver PCB
147
Check Fan Rotation State
148
Check the Static Pressure
148
Driver PCB
148
Outdoor Unit Fan Motor Temp. Abnormal
148
Check the Wiring Connection
149
Outdoor Unit Fan Motor Driver Abnormal
149
Replace Fan Motor
149
Coil 1 (EEV) Error
150
Coil 2 (EEV) Error
151
Coil 3 (EEV) Error
152
Slave Outdoor Unit Error
153
Discharge Tempreture 1 Abnormal
154
Compressor 1 Temperature Abnormal
155
Compressor Temp. Sensor 1
155
Cooling/ Cooling Main Operation
156
Heating/ Heating Main Operation
156
High Pressure Abnormal
156
High Pressure Protection 1
157
High Pressure Switch 1
157
Low Pressure Abnormal
158
Heat Ex.1 Gas Temp. Error
159
Heat Ex.1 Gas Temp. Sensor (TH7)
159
Heat Ex.2 Gas Temp. Error
160
Heat Ex.2 Gas Temp. Sensor (TH8)
160
Outdoor Unit Heat Sink Tempreture Abnormal
161
RB Unit Controller PCB
162
RB Unit EEPROM Access Abnormal
162
RB Unit Communication PCB
163
RB Unit Controller PCB Circuit
163
RB Unit Transmission PCB2 Parallel Communication Error
163
Initial Setting Error
164
Trouble Shooting no Error Code
165
Indoor Unit - no Power
165
RB Unit - no Power
168
Check Indoor, RB Unit and Outdoor Installation Condition
169
No Operation (Power Is ON)
169
No Cooling / no Heating
170
Abnormal Noise
171
Diagnosis Method When Abnormal Noise Is Occurred
171
Diagnosis Method When Water Is Spitting out
172
Diagnosis Method When Water Leak Occurs
172
Water Leaking
172
Outdoor Air Unit - no Power
173
Indoor Unit Power Supply Error for FAN Motor 1 (2)
174
Indoor Unit Suction Air Temp. Thermistor Error
175
Discharge Air Temp. Thermistor
176
Indoor Unit Fan Motor 2 Rotation Speed Error
177
Indoor Unit Power Supply Error of AC24V System
178
Service Information
179
Basic Trouble Shooting Procedure
179
Network Communication Abnormal
179
Color of Connector
180
Pipe Temperature in Cooling Mode
180
RB Unit Abnormal (no Cooling, no Heating, Abnormal Noise)
180
Back up Operation
181
Method of Backup Operation
181
How to Judge, When Refrigerant Is Deficient
183
On Cooling Operation
183
Refrigerant Shortage at the Backup Operation
183
Work Procedure after the Backup Operation
183
How to Respond, When Refrigerant Is Deficient
184
Refrigerant Charging after the Compressor Replacement
184
Service Parts Information
185
Check Winding Resistance
186
Inverter Compressor
186
Filter PCB (Main)
187
Main PCB
187
Filter PCB (INV)
188
Fan Driver PCB
189
Filter PCB(INV)
190
Check Point 2
191
Ipm
191
3-Phase Diode Bridge
192
Appearance Check
192
Electric Check
192
Reactor
193
Resistor, Cement
194
Magnetic Relay
195
Terminal
195
Indoor Unit Electronic Expansion Valve
196
Outdoor Unit Electronic Expansion Valve
197
Outdoor Unit Solenoid Valve
200
Check Opening & Closing Operation of SV4
201
Check Operation of SV3
201
4-Way Valve 1 (2)
202
Indoor Unit AC Fan Motor
203
Indoor Unit Fan Motor
204
Outdoor Unit Fan Motor
204
Pressure Switch
206
Thermistor
206
RB Unit Solenoid Valve
207
Upper Side
207
Appending Data (Unit)
208
Outdoor Unit
210
Refrigerant Circuit
210
Outdoor Unit
211
RB Unit
211
Symbol Description
211
Wiring Diagram
214
High Static Pressure Duct Type
218
Floor / Ceiling Type
219
Ceiling Type
220
Outdoor Air Unit
227
Vertical Air Handler
229
6 Disassembly Process
230
Indoor Unit Transmisson PCB Removal
231
Indoor Unit Transmisson PCB Install
231
PANEL TOP Removal
232
CONTROL BOX COVER Removal
232
Layout Plan in CONTROL BOX
233
Screw Tightening Torque
233
Main PCB Removal
234
Inverter PCB Removal
235
Fan Driver PCB Removal
236
PANEL BTM Removal
237
Control Box Open
237
THERMISTORS Removal
238
Solenoid Coils
238
EEV COILS Removal
238
PRESSURE SENSORS Removal
238
Fan Motor Removal
239
Comp Box Cover Removal
239
Compressor Removal
240
Procedure for Compressor Removal
240
Remove the Compressor Cover (Top)
241
Remove the Compressor Cover (Outside)
241
Procedure for Compressor Installation
242
Precautions for Installation of Compressor
242
Precautions for Exchange of 4 Way Valve a Assy
243
Fusible Plug
243
Location of Fusible Plug
243
Precautions for When Replacing Refrigerant-Cycle-Parts
244
5
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Fujitsu Airstage VR-II Series Specifications
General
Brand
Fujitsu
Model
Airstage VR-II Series
Category
Air Conditioner
Language
English
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