Table Of Contents - Mitsubishi Electric City Multi PUHY-P500YSHM-A Service Handbook

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] System configuration .............................................................................................................. 17
[2] Types and Maximum allowable Length of Cables .................................................................. 17
[3] Switch Settings and Address Settings .................................................................................... 18
[4] An Example of a System to which an MA Remote Controller is connected ........................... 24
[5] Restrictions on Pipe Length.................................................................................................... 27
III Outdoor Unit Components
[1] Outdoor Unit Components and Refrigerant Circuit ................................................................. 31
[2] Control Box of the Outdoor Unit.............................................................................................. 33
[3] Outdoor Unit Circuit Board...................................................................................................... 34
IV Indoor Unit Structure
[1] External View.......................................................................................................................... 41
[2] Control Box ............................................................................................................................. 42
[3] Board ...................................................................................................................................... 43
[4] Fan.......................................................................................................................................... 44
V Remote Controller
[1] Functions and Specifications of MA Remote Controller ......................................................... 47
[2] Interlock Settings via the MA Remote Controller .................................................................... 48
[3] Using the built-in Temperature Sensor on the Remote Controller.......................................... 49
VI Electrical Wiring Diagram
[1] Electrical Wiring Diagram of the Outdoor Unit ........................................................................ 53
[2] Electrical Wiring Diagram of Transmission Booster................................................................ 54
[3] Electrical Wiring Diagram of the Indoor Unit........................................................................... 55
VII Refrigerant Circuit
[1] Refrigerant Circuit Diagram .................................................................................................... 59
[2] Principal Parts and Functions ................................................................................................. 60
VIII Control
[1] Functions and Factory Settings of the Dipswitches ................................................................ 67
[2] Controlling the Outdoor Unit ................................................................................................... 71
[3] Operation Flow Chart.............................................................................................................. 81
IX Test Run Mode
[1] Items to be checked before a Test Run.................................................................................. 87
[2] Test Run Method .................................................................................................................... 88
[3] Operating Characteristic and Refrigerant Amount.................................................................. 89
[4] Adjusting the Refrigerant Amount........................................................................................... 89
[5] Refrigerant Amount Adjust Mode............................................................................................ 92
[6] The following symptoms are normal. ...................................................................................... 94
[7] Standard Operation Data (Reference Data) ........................................................................... 95
X Troubleshooting
[1] Error Code Lists...................................................................................................................... 99
[2] Responding to Error Display on the Remote Controller........................................................ 102
[3] Investigation of Transmission Wave Shape/Noise ............................................................... 159
[4] Troubleshooting Principal Parts............................................................................................ 162
[5] Refrigerant Leak ................................................................................................................... 181
[6] Compressor Replacement Instructions................................................................................. 183
[7] Troubleshooting Using the Outdoor Unit LED Error Display................................................. 185
HWE07150 GB