Table Of Contents - Mitsubishi Electric CAHV-R450YA-HPB Service Manual

CONTENTS
I Read Before Servicing
[1] Read Before Servicing.............................................................................................................. 3
[2] Necessary Tools and Materials ................................................................................................ 4
[3] Brazing...................................................................................................................................... 5
[4] Air Tightness Test..................................................................................................................... 6
[5] Vacuum Drying (Evacuation) .................................................................................................... 7
[6] Refrigerant Charging ................................................................................................................ 9
[7] Remedies to be taken in case of a Refrigerant Leak................................................................ 9
[8] Characteristics of the Conventional and the New Refrigerants .............................................. 10
[9] Precautions for handling equipment using R454C ................................................................. 11
[10] Notes on Refrigerating Machine Oil...................................................................................... 18
II Restrictions
[1] System Configuration ............................................................................................................. 21
[2] Types and Maximum allowable Length of Cables .................................................................. 22
[3] Main Power Supply Wiring and Switch Capacity .................................................................... 23
[4] Sample Installation ................................................................................................................. 27
[5] Switch Types and the Factory Settings .................................................................................. 28
[6] Configuring the Settings ......................................................................................................... 29
[7] Water Pipe Installation............................................................................................................ 36
III Unit Components
[1] Unit Components and Refrigerant Circuit ............................................................................... 43
[2] Control Box of the Unit............................................................................................................ 45
[3] Unit Circuit Board.................................................................................................................... 46
IV Remote Controller
[1] Using the Remote Controller .................................................................................................. 55
V Electrical Wiring Diagram
[1] Electrical Wiring Diagram ....................................................................................................... 67
VI Refrigerant Circuit
[1] Refrigerant Circuit Diagram .................................................................................................... 73
[2] Principal Parts and Functions ................................................................................................. 74
VII Control
[1] Functions and Factory Settings of the Dip switches ............................................................... 79
[2] Operating characteristics and Control Capabilities................................................................. 96
VIII Test Run Mode
[1] Items to be checked before a Test Run................................................................................ 113
[2] Test Run Method .................................................................................................................. 115
[3] Operating the Unit................................................................................................................. 116
[4] Refrigerant ............................................................................................................................ 117
[5] Symptoms that do not Signify Problems............................................................................... 117
[6] Standard operating characteristics (Reference data) ........................................................... 117
IX Maintenance
[1] Periodic maintenance inspections ........................................................................................ 121
[2] Guidelines for Maintenance and Inspection of Major Parts .................................................. 122
X Troubleshooting
[1] Maintenance items................................................................................................................ 127
[2] Troubleshooting .................................................................................................................... 135
[3] Troubleshooting Principal Parts............................................................................................ 141
[4] Refrigerant Leak ................................................................................................................... 158
[5] Parts Replacement Procedures............................................................................................ 159
XI USB Function
[1] Service Overview.................................................................................................................. 175
[2] Software Rewrite Function on the USB ................................................................................ 177
[3] Maintenance LED Display and Troubleshooting................................................................... 179
XII Attachments
[1] R454C saturation temperature table..................................................................................... 185
HWE22020 GB