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Contents
1
PRECAUTIONS FOR DEVICES THAT USE R407C REFRIGERANT ..... 3
[1] Storage of Piping Material ................................................................. 4
[2] Piping Machining ............................................................................... 5
[3] Brazing .............................................................................................. 6
[4] Airtightness Test ................................................................................ 7
[5] Vacuuming ........................................................................................ 7
[6] Charging of Refrigerant ..................................................................... 8
[7] Dryer ................................................................................................. 8
2
COMPONENT OF EQUIPMENT ............................................................. 9
[1] Appearance of Components ............................................................. 9
[2] Refrigerant Circuit Diagram and Thermal Sensor ........................... 17
[3] Electrical Wiring Diagram ................................................................ 20
[4] Standard Operation Data ................................................................ 24
[5] Function of Dip SW and Rotary SW ................................................ 26
3
TEST RUN ............................................................................................. 29
[1] Before Test Run ............................................................................... 29
[2] Test Run Method ............................................................................. 33
4
GROUPING REGISTRATION OF INDOOR UNITS WITH M-NET
REMOTE CONTROLLER ...................................................................... 34
5
CONTROL ............................................................................................. 40
[1] Control of Outdoor Unit ................................................................... 40
[2] Control of BC Controller .................................................................. 49
[3] Operation Flow Chart ...................................................................... 50
[4] List of Major Component Functions ................................................ 56
[5] Resistance of Temperature Sensor ................................................. 59
6
REFRIGERANT AMOUNT ADJUSTMENT ........................................... 60
[1] Operating Characteristics and Refrigerant Amount ........................ 60
[2] Adjustment and Judgement of Refrigerant Amount ........................ 60
[3] Refrigerant Volume Adjustment Mode Operation ............................ 62
7
TROUBLESHOOTING ........................................................................... 66
[1] Principal Parts ................................................................................. 66
[2] BC Controller Disassembly Procedure .......................................... 100
[3] Self-diagnosis and Countermeasures Depending on the Check
Code Displayed ............................................................................. 105
[4] LED Monitor Display ..................................................................... 127
8
PREPARATION, REPAIRS, AND REFRIGERANT REFILLING WHEN
REPAIRING LEAKS ............................................................................. 141
[1] Location of leaks: Extension piping or indoor units
(when cooling) .............................................................................. 141
[2] Location of leaks: Outdoor unit (Cooling mode) ............................ 142
[3] Location of leaks: Extension piping or indoor units
(Heating mode) ............................................................................. 142
[4] Location of leaks: Outdoor unit (when heating) ............................. 142
9
CHECK THE COMPOSITION OF THE REFRIGERANT ..................... 143