Table of Contents
CONTENTS
[1] Read Before Servicing.............................................................................................................. 3
[2] Necessary Tools and Materials ................................................................................................ 4
[3] Piping Materials ........................................................................................................................ 5
[4] Storage of Piping ...................................................................................................................... 7
[5] Pipe Processing........................................................................................................................ 7
[6] Brazing...................................................................................................................................... 8
[7] Air Tightness Test..................................................................................................................... 9
[8] Vacuum Drying (Evacuation) .................................................................................................. 10
[9] Refrigerant Charging .............................................................................................................. 12
[10] Remedies to be taken in case of a Refrigerant Leak............................................................ 12
[11] Characteristics of the Conventional and the New Refrigerants ............................................ 13
[12] Notes on Refrigerating Machine Oil...................................................................................... 14
II Restrictions
[1] System configuration .............................................................................................................. 17
[2] Types and Maximum allowable Length of Cables .................................................................. 18
[3] Switch Settings and Address Settings .................................................................................... 19
[4] Sample System Connection ................................................................................................... 25
[5] An Example of a System to which an MA Remote Controller is connected ........................... 26
[6] An Example of a System to which an M-NET Remote Controller is connected ..................... 38
[7] An Example of a System to which both MA Remote Controller and M-NET Remote
Controller are connected ........................................................................................................ 40
[8] Restrictions on Pipe Length.................................................................................................... 43
III Outdoor Unit Components
[1] Outdoor Unit Components and Refrigerant Circuit ................................................................. 57
[2] Control Box of the Outdoor Unit.............................................................................................. 60
[3] Outdoor Unit Circuit Board...................................................................................................... 61
[4] BC Controller Components..................................................................................................... 66
[5] Control Box of the BC Controller ............................................................................................ 69
[6] BC Controller Circuit Board .................................................................................................... 70
IV Remote Controller
[1] Functions and Specifications of MA and ME Remote Controllers .......................................... 75
[2] Group Settings and Interlock Settings via the ME Remote Controller .................................... 76
[3] Interlock Settings via the MA Remote Controller .................................................................... 80
[4] Using the built-in Temperature Sensor on the Remote Controller.......................................... 81
V Electrical Wiring Diagram
[1] Electrical Wiring Diagram of the Outdoor Unit ........................................................................ 85
[2] Electrical Wiring Diagram of the BC Controller....................................................................... 86
[3] Electrical Wiring Diagram of Transmission Booster................................................................ 96
VI Refrigerant Circuit
[1] Refrigerant Circuit Diagram .................................................................................................... 99
[2] Principal Parts and Functions ............................................................................................... 106
VII Control
[1] Functions and Factory Settings of the Dipswitches .............................................................. 117
[2] Controlling the Outdoor Unit ................................................................................................. 123
[3] Controlling BC Controller ...................................................................................................... 136
[4] Operation Flow Chart............................................................................................................ 137
VIII Test Run Mode
[1] Items to be checked before a Test Run................................................................................ 145
[2] Test Run Method .................................................................................................................. 146
[3] Operating Characteristic and Refrigerant Amount................................................................ 147
[4] Adjusting the Refrigerant Amount......................................................................................... 147
[5] Refrigerant Amount Adjust Mode.......................................................................................... 150
[6] The following symptoms are normal. .................................................................................... 152
[7] Standard Operation Data (Reference Data) ......................................................................... 153
HWE07130
GB
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