Table Of Contents - Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook

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 Outdoor Unit / BC Controller Components
[1] Outdoor Unit Components and Refrigerant Circuit............................................................... 67
[2] Control Box of the Outdoor Unit ........................................................................................... 79
[3] Outdoor Unit Circuit Board ................................................................................................... 81
[4] BC Controller (Under the panel) ........................................................................................... 86
[5] Control Box of the BC Controller .......................................................................................... 88
[6] BC Controller Circuit Board .................................................................................................. 89
IV Remote Controller
[1] Functions and Specifications of MA and ME Remote Controllers ........................................ 93
[2] Group Settings and Interlock Settings via the ME Remote Controller.................................. 94
[3] Interlock Settings via the MA Remote Controller.................................................................. 98
[4] Using the built-in Temperature Sensor on the Remote Controller...................................... 101
V
Electrical Wiring Diagram
[1] Electrical Wiring Diagram of the Outdoor Unit.................................................................... 105
[2] Electrical Wiring Diagram of the BC Controller................................................................... 109
VI Refrigerant Circuit
[1] Refrigerant Circuit Figure ................................................................................................... 119
[2] Principal Parts and Functions............................................................................................. 126
VII Control
[1] Functions and Factory Settings of the Dipswitches............................................................ 139
[2] Controlling the Outdoor Unit ............................................................................................... 148
[3] Controlling BC Controller.................................................................................................... 164
[4] Operation Flow Chart ......................................................................................................... 165
VIII Test Run Mode
[1] Items to be checked before a Test Run.............................................................................. 179
[2] Test Run Method ................................................................................................................ 180
[3] Operating Characteristic and Refrigerant Amount.............................................................. 181
[4] Adjusting the Refrigerant Amount....................................................................................... 182
[5] Refrigerant Amount Adjust Mode ....................................................................................... 187
[6] The following symptoms are normal................................................................................... 191
[7] Standard Operation Data (Reference Data) ....................................................................... 192
CONTENTS