Hitachi 7E305256 Manuals

Manuals and User Guides for Hitachi 7E305256. We have 1 Hitachi 7E305256 manual available for free PDF download: Service Manual

Hitachi 7E305256 Service Manual

Hitachi 7E305256 Service Manual (340 pages)

Brand: Hitachi | Category: Air Conditioner | Size: 25.47 MB

Table of Contents

Table of Contents

5
- Introduction
  14
- Applied Symbols
  15
- Norms and Regulations
  15
- Product Guide
  16
- Classification of Outdoor Unit Models
  16
- Classification of Indoor Unit Models
  16
- Product Line-Up: Outdoor Units
  17
- Outdoor Unit Accessory Code List
  18
- Product Line-Up: Indoor Units
  19
- Product Line-Up: KPI Energy Recovery Unit
  23
- Product Line-Up: DX-Interface
  23
- Product Line-Up: Econofresh
  23
- Multi-Kits
  24
- Individual Remote Controls
  24
- Receiver Kit for Combination with Wireless Remote Control Switch
  25
- Centralised Remote Controls
  26
- Building Air Conditioning Controls
  26
- Control Support Devices
  27
- Gateways for Building Management Systems (BMS)
  27
- Control Accessories
  28
- Optional Parts and Installation for RAS-3HVRC2
  30
- Air Flow Guide AG-264
  30
- Wind Guard WSP-264
  31
- Snow Protection Hood
  32
- Air Discharge Hood
  32
- Rear Suction Hood
  33
- Left Suction Hood
  34
- Assembly of Snow Protection Hood
  35
- Optional Parts and Installation RAS-(4-6)H(V)(R/N)(C/P)2E
  36
- Air Flow Guide AG-335A
  36
- Wind Guard WSP-335A
  37
- Snow Protection Hood
  38
- Air Discharge Hood
  38
- Rear Suction Hood
  39
- Left Suction Hood
  40
- Assembly of Snow Protection Hood
  41
- Piping Work and Refrigerant Charge
  43
- General Notes before Performing Pipe Work
  44
- Piping Materials
  44
- Three Principles on Refrigerant Piping Work
  46
- Suspension of Refrigerant Piping
  46
- Brazing Work
  47
- Piping Connection for Outdoor Unit
  48
- Ras-3Hvrc2
  48
- Ras-(4-6)H(V)(R/N)(C/P)2E
  49
- Outdoor Unit Stop Valve
  52
- Piping System for Header Branch
  54
- Refrigerant Piping Length
  54
- Refrigerant Piping Range
  54
- Maximum Lenght of Refrigerant Piping
  55
- Combinations of Piping Size and Piping Length
  56
- Refrigerant Piping Size and Multikit/Distributor
  56
- System Installation
  58
- Refrigerant Charge
  61
- Caution of the Pressure by Check Joint
  62
- Refrigerant Charge Quantity
  62
- Refrigerant Charge before Shipment (W (Kg))
  63
- Calculation Method for the Additional Refrigerant Charge
  63
- Caution in Case of Refrigerant Leakage
  65
- Maximum Permitted Concentration of Hydrofluorocarbon (HFC)
  65
- Calculation of Refrigerant Concentration
  65
- Countermeasure for R410A Refrigerant Leakage
  66
- Drain Piping
  67
- Drain Discharging Boss
  67
- Electrical and Control Settings
  69
- Led's Indication
  70
- General Check
  70
- General Notes
  70
- Electrical Wiring Connection for the Outdoor Unit
  71
- Electrical Settings
  72
- Outdoor and Indoor Unit Electrical Wiring
  72
- Wire Size
  73
- Electrical Wiring Diagrams
  75
- Ras-3Hvrc2
  75
- RAS-(4-6)HV(R/N)(C/P)2E (1~ 230V 50Hz)
  77
- RAS-(4-6)HV(R/N)(C/P)2E (3N~ 400V 50Hz)
  79
- Control System
  81
- Device Control System
  82
- Ras-3Hvrc2
  82
- Ras-(4-6)H(V)(R/N)(C/P)2E
  83
- Outline of the Control System
  84
- Outdoor Units Printed Circuit Board (PCB)
  86
- Ras-3Hvrc2
  86
- Ras-(4-6)H(V)(R/N)(P/C)2E
  87
- Ras-(4-6)Hv(R/N)(C/P)2E (Pcb1)
  87
- Ras-(4-6)H(R/N)(C/P)2E (Pcb)
  88
- Protection Control
  89
- Protection Control Code on 7-Segment Display
  89
- Activating Condition of Protection Control Code
  90
- Control and Safety Devices
  95
- Standard Operation Sequence RAS-3HVRC2 and RAS-(4-6)H(V)(R/N)(C/P)2E
  96
- Cooling Operation
  96
- Dry Operation
  98
- Heating Operation
  100
- Defrost Operation RAS-3HVRC2
  102
- Defrost Operation RAS-(4-6)H(V)(R/N)(C/P)2E
  103
- Freezing Protection During Cooling Process or Dry Operation
  105
- Standard Control Functions
  105
- Prevention Control for Excessively High Discharge Gas Temperature
  106
- Optional Functions
  107
- External Input and Output Setting
  108
- Function Setting
  108
- Check Mode
  108
- Menu Mode Accessing (by 7-Segment Display)
  108
- Ras-3Hvrc2
  108
- External Input and Output Setting (by 7-Segment Display)
  109
- Available Control Functions
  109
- Setting of External Input and Output
  110
- Optional External Output Signals
  110
- Available Ports
  111
- Available Output Signals
  112
- Function Setting (by 7-Segment Display)
  112
- Sequence of the Function Setting
  112
Function Setting

114
- Circulator Function at Heating Thermo
  117
- Circulator Function at Heating Thermo-OFF (FA)
  117
- Night-Shift (Low Noise)(Ni)
  117
- Cancellation of the Outdoor Ambient Temperature Limit (GS)
  118
- Change of Defrost Condition (Jo)
  119
- Change the Opening Degree of the Expansion Valve (Si)
  120
- Priority Capacity Mode Setting (Nu)
  120
- Priority Cooling Capacity Mode (Hc)
  120
- Priority Heating Capacity Mode (Hh)
  120
- Slo Defrost Setting (Bj)
  120
- Change of Heating Thermo-OFF Opening Degree of the Expansion Valve (So)
  121
- Heating Start Opening Degree Change (CI)
  121
- Low Noise Setting (Db)
  121
- Demand Function Setting (De)
  122
- Cold Draft Protection (Fb)
  123
- Forced Stop When Defrosting Is Restored (Ds)
  123
- Wave Function Setting (UE)
  123
- Alternate Defrost Mode (F5)
  124
- Defrost
  124
- Intermittent Operation of Outdoor Fan (F1)
  124
- Cancellation of Defrost at Absence Judgement (F9)
  125
- Change Forced Stoppage Status (FE)
  125
- Check Mode
  126
- External Input and Output Setting
  126
- Function Setting
  126
- Menu Mode Accessing (by 7-Segment Display)
  126
- Ras-(4-6)H(V)(R/N)(C/P)2E
  126
- Available Control Functions
  127
- External Input and Output Setting (by 7-Segment Display)
  127
- Setting of External Input and Output
  128
- External Input Function Setting
  129
- External Output Function Setting
  131
- Function Setting (by 7-Segment Display)
  132
- Sequence of the Function Setting
  132
- Demand Function Setting
  133
- Indoor Expansion Valve Opening
  133
- Indoor Expansion Valve Operating
  133
- Low Noise Setting
  133
- Protection of Decrease in Outlet
  133
- Slo (Fan Speed)Defrost Setting
  133
- Temperature for Cooling
  133
Function Setting

134
- Circulator Function at Heating Thermo
  137
- Circulator Function at Heating Thermo-OFF (FA)
  137
- Night-Shift (Low Noise)
  137
- Night-Shift (Low Noise)(Ni)
  137
- Cancellation of Outdoor Ambient Temperature Limit
  138
- Cancellation of the Outdoor Ambient Temperature Limit (GS)
  138
- Defrost for Cold Area
  139
- Defrost for Cold Area (Jo)
  139
- Priority Capacity Mode Setting (Nu)
  139
- Slo Defrost Setting (Bj)
  139
- Demand Function Setting
  140
- Demand Function Setting (De)
  140
- Low Noise Setting (Db)
  140
- Cold Draft Protection
  141
- Cold Draft Protection (Fb)
  141
- Outlet Temperature (DOAS)
  141
- Wave Function Setting
  141
- Wave Function Setting (UE)
  141
- Outdoor Unit Capacity Control
  142
- Power Saving Function from Wired Controller
  142
- Power Saving Guide
  142
- Intermittent Control Function
  143
- Rotation Control Function
  143
- Operation Noise Reduction Schedule Function
  144
- Power Consumption Display Function
  144
- Power Saving Schedule Function
  144
- Commissioning
  145
- Preliminary Checks
  146
- Before the Test Run
  147
- Test Run Using the PC-ARFP1E Remote Control Switch (Example)
  148
- Test Run from the Outdoor Unit
  150
- Checking at Test Run
  152
- Refrigerant Cycle Checklist
  153
- Test Run Check List
  156
- Electrical Checks of Main Parts
  157
- Inverter
  158
- Ras-(4-6)Hv(R/N)(C/P)2E
  158
- Ras-(4-6)H(R/N)(C/P)2E
  160
- Specifications of Inverter
  162
- Inverter Time Chart
  164
- Protective Function
  164
- Overload Control
  166
- Thermistor
  167
- Thermistors for RAS-3HVRC2
  167
- Thermistors for RAS-(4-6)H(V)(R/N)(C/P)2E
  168
- Electronic Expansion Valve
  171
- High Pressure Protection Device
  172
- Ras-(4-6)H(V)(R/N)(C/P)2E
  172
- Ras-3Hvrc2
  172
- Noise Filter (NF)
  173
- Ras-(4-6)H(R/N)(C/P)2E
  174
- Ras-(4-6)Hv(R/N)(C/P)2E
  174
- Ras-3Hvrc2
  174
- Reactor (DCL)
  174
- Rotary Compressor
  175
- Servicing
  177
- Safety Introduction
  178
- Ras-3Hvrc2
  179
- Removing the
  179
- Removing the Pipe Cover
  179
- Removing the Outdoor Fan
  180
- Removing the Compressor
  181
- Removing the 4-Way Valve Coil
  183
- Removing the High Pressure Switch and Pressure Switch for Control
  183
- Removing the Electrical Box
  184
- Removing the Electronic Expansion Valve Coil
  184
- Removing Display PCB
  185
- Removing Other Electrical Components
  185
- Ras-(4-6)H(V)(R/N)(C/P)2E
  186
- Remove Outlet Grille
  186
- Removing Service Cover
  186
- Removing Upper Cover
  186
- Removing Bottom Service Cover and Rear Cover
  187
- Removing Outdoor Fan Motor
  187
- Removing Electrical Box
  188
- Removing the Compressor
  191
- Removing the High Pressure Switch and Pressure Switch for Control
  195
- Removing 4-Way Valve Coil
  197
- Removing Electronic Expansion Valve Coil
  197
- Removing 4-Way Valve
  198
- Removing Solenoid Valve Coil (SVA)
  198
- Removing Electronic Expansion Valve
  199
- Removing Solenoid Valve
  200
- Disassembly / Assembly the Electrical Components for RAS-(4-6)HV(R/N)(C/P)2E
  201
- Disassembly / Assembly Electrical Components for RAS-(4-6)H(R/N)(C/P)2E
  206
- Removing Pipe Thermistors
  211
- Troubleshooting
  213
- Initial Troubleshooting
  215
- Power Supply Failure to the Indoor Unit and the Remote Control Switch (PC-ARFP1E)
  215
- Ras-3Hvrc2
  215
- Simple Checking Procedure by Means of the 7-Segment Display
  215
- Abnormal Operation of the Devices
  216
- Checking the Electrical Wires and the Power Source
  219
- Ras-(4-6)H(V)(R/N)(C/P)2E
  219
- Checking by 7-Segment Display
  220
- Failure of the Power Supply to Indoor Units and the Remote Control Switch
  223
- Abnormal Transmission between Remote Control Switch and Indoor Unit
  224
- Abnormal Operation of the Devices
  225
- Alarm Codes for the Outdoor Units
  236
- Ras-3Hvrc2
  236
- Troubleshooting Procedure
  236
- Troubleshooting by Alarm Code
  238
- Alarm Codes of Wired Controller
  262
- Ras-(4-6)H(V)(R/N)(C/P)2E
  262
- Troubleshooting by Alarm Code
  265
- Check Mode Display by Unit Controller
  298
- Ras-3Hvrc2
  298
- Troubleshooting in Check Mode
  298
- Troubleshooting Using the 7 Segment Display (Outdoor Unit)
  298
- Ras-(4-6)H(V)(R/N)(C/P)2E
  303
- Troubleshooting by Using the 7-Segment Display
  303
- Checking Procedure for Main Parts
  310
- Checking Procedure for the PCB
  310
- Ras-3Hvrc2
  310
- Checking Procedeure for the DC Fan Motor
  311
- Checking Procedure for the Electronic Expansion Valve for Indoor and Outdoor Units
  312
- Checking Procedure for Other Parts
  313
- Checking Procedure for the Inverter PCB
  315
- Checking Procedure for the Compressor
  316
- Location of Print Circuit Boards (Pcbs)
  318
- Purpose
  318
- RSW, Dsws and Leds Functions RAS-(4-6)HV(R/N)(C/P)2E
  318
- Location of Print Circuit Boards (Pcbs)
  321
- Purpose
  321
- RSW, Dsws and Leds Functions RAS-(4-6)H(R/N)(C/P)2E
  321
- Maintenance Notes
  325
- Checking the Power Source and the Wiring Connection
  326
- General Notes
  326
- Insufficient Cooling Performance When a Long Piping Is Applied
  326
- Abnormally High Operation Sound (in the Ceiling Type Indoor Unit)
  327
- Alarm Code "31
  327
- Not Cooling Well Due to Insufficient Installation Space for the Outdoor Unit
  327
- Maintenance Work
  328
- Service and Maintenance Record
  329
- Service and Maintenance Record Using the 7-Segment Display
  330
- Information of Cause Code of Alarm
  332
- Information of Cause Code of Alarm Record
  332
- Information of Indoor Unit
  332
- Ras-3Hvrc2
  333
- Service and Maintenance Table through the Remote Control Switch
  333
- Ras-(4-6)(V)(R/N)(C/P)2E
  335
- Refrigerant Collection Method
  336
- Refrigerant Collection Method When Replacing the Parts of Outdoor Unit
  336
- Refrigerant Collection Method When Replacing Indoor Unit
  338

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