Hitachi Set Free mini-HNRQ1 Series, Service Manual

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Contents
Installation .........................................................................................................................................................1
1. Before Installation .........................................................................................................................................2
1.1 Necessary Tools and Instrument List for the Installation .........................................................................2
1.2 Structure ..................................................................................................................................................4
1.3 Refrigerant Cycle Diagram ......................................................................................................................7
1.4 Model of Outdoor Unit .............................................................................................................................8
1.5 Transportation .........................................................................................................................................9
1.6 Factory Supplied Accessories ...............................................................................................................10
2. Outdoor Unit Installation .............................................................................................................................. 11
2.1 Installation Location and Precautions .................................................................................................... 11
2.2 Service Space .......................................................................................................................................13
2.3 Installation Work ....................................................................................................................................16
3. Refrigerant Piping Work ..............................................................................................................................18
3.1 Precaution for Refrigerant Piping ..........................................................................................................18
3.2 Model of Branch Pipe ............................................................................................................................21
3.3 Refrigerant Piping Size ..........................................................................................................................22
3.4 Refrigerant Piping Work for Outdoor Unit ..............................................................................................24
3.5 Air Tight Test ..........................................................................................................................................26
3.6 Vacuuming .............................................................................................................................................27
3.7 Additional Refrigerant Charge Calculation ............................................................................................28
3.8 Additional Refrigerant Charge Work ......................................................................................................29
3.9 Pressure Measurement .........................................................................................................................30
4. Electrical Wiring ...........................................................................................................................................30
4.1 General Check ......................................................................................................................................31
4.2 Electrical Wiring Connection .................................................................................................................32
4.3 Electrical Wiring for Outdoor Unit ..........................................................................................................34
5. DIP Switch Setting of Outdoor Unit .............................................................................................................36
6. Test Run ......................................................................................................................................................38
6.1 Before Test Run .....................................................................................................................................38
6.2 Test Run by DIP Switch of Outdoor Unit ................................................................................................38
6.3 Test Run by Wired Controller.................................................................................................................39
7. Safety and Control Device Setting...............................................................................................................40
8. Drain Adapter: DC-01Q (Optional Parts) ....................................................................................................41
Troubleshooting ...............................................................................................................................................43
1. Initial Troubleshooting..................................................................................................................................44
1.1 Checking Electrical Wiring and Power Source ......................................................................................44
1.2 Location of Printed Circuit Boards .........................................................................................................46
1.3 Checking Rotary Switch and DIP Switch Settings .................................................................................54
1.4 Checking Wired Controller ....................................................................................................................57
1.5 Checking Using 7-Segment Display ......................................................................................................61
1.6 Checking of Protection Control Information ...........................................................................................72
2. Troubleshooting Procedures........................................................................................................................73
2.1 Alarm Code Indication of Wired Controller ............................................................................................73
2.2 Troubleshooting Using Alarm Codes .....................................................................................................74
3. Procedures for Checking ...........................................................................................................................105
3.1 Checking Method for Outdoor Unit PCB of 3~6.5HP ..........................................................................105
3.2 Checking Method for PCBA of 7~12HP ...............................................................................................109
3.3 Checking Method of Electronic Expansion Valve ................................................................................ 115
Maintenance ..................................................................................................................................................121