Mitsubishi Electric City Multi CMB-P1016NU-G, Service Handbook

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CONTENTS
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 ............................................................................................................ 11
[10] Remedies to be taken in case of a Refrigerant Leak............................................................ 11
[11] Characteristics of the Conventional and the New Refrigerants ............................................ 12
[12] Notes on Refrigerating Machine Oil...................................................................................... 13
II
Restrictions
[1] Types and Maximum allowable Length of Cables ................................................................ 17
[2] Switch Settings and Address Settings.................................................................................. 18
[3] Sample System Connection ................................................................................................. 23
[4] An Example of a System to which an MA Remote Controller is connected ......................... 24
[5] An Example of a System to which an M-NET Remote Controller is connected ................... 46
[6] An Example of a System to which both MA Remote Controller and M-NET Remote
Controller are connected ...................................................................................................... 50
[7] Restrictions on Pipe Length.................................................................................................. 53
III
Heat Source Unit / BC Controller Components
[1] Heat Source Unit Components and Refrigerant Circuit........................................................ 67
[2] Control Box of the Heat Source Unit .................................................................................... 69
[3] Heat Source Unit Circuit Board ............................................................................................ 70
[4] BC Controller (Under the panel) ........................................................................................... 73
[5] Control Box of the BC Controller .......................................................................................... 75
[6] BC Controller Circuit Board .................................................................................................. 76
IV
Remote Controller
[1] Functions and Specifications of MA and ME Remote Controllers ........................................ 81
[2] Group Settings and Interlock Settings via the ME Remote Controller.................................. 82
[3] Interlock Settings via the MA Remote Controller.................................................................. 86
[4] Using the built-in Temperature Sensor on the Remote Controller........................................ 89
V
Electrical Wiring Diagram
[1] Electrical Wiring Diagram of the Heat Source Unit............................................................... 93
[2] Electrical Wiring Diagram of the BC Controller..................................................................... 94
VI
Refrigerant Circuit
[1] Refrigerant Circuit Diagram ................................................................................................ 105
[2] Principal Parts and Functions............................................................................................. 109
VII
Control
[1] Functions and Factory Settings of the Dipswitches............................................................ 121
[2] Controlling the Heat Source Unit ........................................................................................ 129
[3] Controlling BC Controller.................................................................................................... 142
[4] Operation Flow Chart ......................................................................................................... 143
VIII
Test Run Mode
[1] Items to be checked before a Test Run.............................................................................. 157
[2] Test Run Method ................................................................................................................ 158
[3] Operating Characteristic and Refrigerant Amount.............................................................. 159
[4] Adjusting the Refrigerant Amount....................................................................................... 160
[5] Refrigerant Amount Adjust Mode ....................................................................................... 164
[6] The following symptoms are normal................................................................................... 168
[7] Standard Operation Data (Reference Data) ....................................................................... 169