Fujitsu Airstage VR-II Series Manuals

Fujitsu Airstage VR-II Series Manuals

Manuals and User Guides for Fujitsu Airstage VR-II Series. We have 1 Fujitsu Airstage VR-II Series manual available for free PDF download: Service Manual

Fujitsu Airstage VR-II Series Service Manual

Fujitsu Airstage VR-II Series Service Manual (247 pages)

Brand: Fujitsu | Category: Air Conditioner | Size: 16.08 MB

Table of Contents

Service Manual
1
Table of Contents
2
1 Test Run

5
- Execution Procedure and Execution Precautions
  7
2 Outdoor Unit Operation Control

34
- Refrigerant Circuit
  35
- Heat Recovery Operation Control
  
  38
- 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
Protective Function

51
Fan Control

61
Master Control

62
Louver Control

72
Electronic Expansion Valve Control

75
Drain Pump Operation

75
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
- 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

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