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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............................................ 99
[3] Self-diagnosis and Countermeasures Depending on the Check
Code Displayed ............................................................................. 104
[4] LED Monitor Display ..................................................................... 121
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)............................. 143
9 CHECK THE COMPOSITION OF THE REFRIGERANT
(PURY-P200·250YMF-C only) ................................................................. 144
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