Mitsubishi Electric PUHY-P120YHMU-A, Service Manual

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CONTENTS
HWE0804A 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 .............................................................................................................. 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 .................................................................. 18
[3] Switch Settings and Address Settings .................................................................................... 19
[4] Sample System Connection ................................................................................................... 26
[5] An Example of a System to which an MA Remote Controller is connected ........................... 27
[6] An Example of a System to which an M-NET Remote Controller is connected ..................... 37
[7] An Example of a System to which both MA Remote Controller and
M-NET Remote Controller are connected .............................................................................. 39
[8] Restrictions on Pipe Length.................................................................................................... 41
III
Outdoor Unit Components
[1] Outdoor Unit Components and Refrigerant Circuit ................................................................. 47
[2] Control Box of the Outdoor Unit.............................................................................................. 49
[3] Outdoor Unit Circuit Board...................................................................................................... 52
IV
Remote Controller
[1] Functions and Specifications of MA and ME Remote Controllers .......................................... 65
[2] Group Settings and Interlock Settings via the ME Remote Controller .................................... 66
[3] Interlock Settings via the MA Remote Controller .................................................................... 70
[4] Using the built-in Temperature Sensor on the Remote Controller .......................................... 71
V
Electrical Wiring Diagram
[1] Electrical Wiring Diagram of the Outdoor Unit ........................................................................ 75
[2] Electrical Wiring Diagram of Transmission Booster................................................................ 78
VI
Refrigerant Circuit
[1] Refrigerant Circuit Diagram .................................................................................................... 81
[2] Principal Parts and Functions ................................................................................................. 82
VII
Control
[1] Functions and Factory Settings of the Dipswitches ................................................................ 89
[2] Controlling the Outdoor Unit ................................................................................................... 96
[3] Operation Flow Chart............................................................................................................ 108
VIII
Test Run Mode
[1] Items to be checked before a Test Run ................................................................................ 115
[2] Test Run Method .................................................................................................................. 116
[3] Operating Characteristic and Refrigerant Amount ................................................................ 117
[4] Adjusting the Refrigerant Amount......................................................................................... 117
[5] Refrigerant Amount Adjust Mode.......................................................................................... 120
[6] The following symptoms are normal. .................................................................................... 122
[7] Standard Operation Data (Reference Data) ......................................................................... 123
IX
Troubleshooting
[1] Error Code Lists.................................................................................................................... 149
[2] Responding to Error Display on the Remote Controller........................................................ 152
[3] Investigation of Transmission Wave Shape/Noise ............................................................... 231
[4] Troubleshooting Principal Parts............................................................................................ 234
[5] Refrigerant Leak ................................................................................................................... 265
[6] Compressor Replacement Instructions................................................................................. 267
[7] Troubleshooting Using the Outdoor Unit LED Error Display................................................. 269
X
LED Monitor Display on the Outdoor Unit Board
[1] How to Read the LED on the Service Monitor ...................................................................... 273