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CONTENTS
HWE0803A GB
I
Read Before Servicing
[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...................................................................................................... 64
[4] BC Controller Components..................................................................................................... 74
[5] Control Box of the BC Controller ............................................................................................77
[6] BC Controller Circuit Board .................................................................................................... 78
IV
Remote Controller
[1] Functions and Specifications of MA and ME Remote Controllers .......................................... 83
[2] Group Settings and Interlock Settings via the ME Remote Controller .................................... 84
[3] Interlock Settings via the MA Remote Controller.................................................................... 88
[4] Using the built-in Temperature Sensor on the Remote Controller.......................................... 89
V
Electrical Wiring Diagram
[1] Electrical Wiring Diagram of the Outdoor Unit........................................................................ 93
[2] Electrical Wiring Diagram of the BC Controller....................................................................... 96
[3] Electrical Wiring Diagram of Transmission Booster.............................................................. 105
VI
Refrigerant Circuit
[1] Refrigerant Circuit Diagram .................................................................................................. 109
[2] Principal Parts and Functions............................................................................................... 116
VII
Control
[1] Functions and Factory Settings of the Dipswitches .............................................................. 125
[2] Controlling the Outdoor Unit ................................................................................................. 132
[3] Controlling BC Controller...................................................................................................... 145
[4] Operation Flow Chart............................................................................................................ 146
VIII
Test Run Mode
[1] Items to be checked before a Test Run................................................................................ 155
[2] Test Run Method .................................................................................................................. 156
[3] Operating Characteristic and Refrigerant Amount................................................................ 157
[4] Adjusting the Refrigerant Amount......................................................................................... 157
[5] Refrigerant Amount Adjust Mode.......................................................................................... 160
[6] The following symptoms are normal..................................................................................... 162
[7] Standard Operation Data (Reference Data) ......................................................................... 163