Table Of Contents - Mitsubishi PWFY-P36NMU-E-BU Service Handbook

Contents
1 Read Before Servicing ................................................................
[1] Items to Be Checked ..............................................................
[2] Necessary Tools and Materials ..............................................
[3] Piping Materials ......................................................................
[4] Storage of Piping .................................................................... 11
[5] Piping Processing .................................................................. 11
[6] Brazing.................................................................................... 12
[7] Air Tightness Test .................................................................... 13
[8] Vacuum Drying (Evacuation) .................................................. 14
[9] Refrigerant Charging .............................................................. 15
[10] Remedies to be taken in case of a Refrigerant Leak ............ 15
[11] Characteristics of the Conventional and the New Refrigerants .. 16
[12] Notes on Refrigerating Machine Oil........................................ 17
2 Restrictions .................................................................................. 18
[1] Types and Maximum allowable Length of Cables .................. 18
[2] Types of Switch Setting and Address Setting ........................ 19
[3] Examples of system connection ............................................ 20
[4] Restrictions on piping length .................................................. 21
3 Components of the Unit .............................................................. 22
[1] Appearance of the Components and Refrigerant Circuit........ 22
[2] Control Box ............................................................................ 23
[3] Circuit Board .......................................................................... 25
4 Remote Controller ........................................................................ 28
[1] Functions and Specifications of MA Remote Controller.................. 28
[2] Interlocking Setting via the MA Remote Controller ........................ 29
5 Electrical Wiring Diagram ............................................................ 31
[1] PWFY-P36NMU-E-BU ............................................................ 31
[2] PWFY-P36, P72NMU-E/E2-AU .............................................. 32
6 Refrigerant Circuit ........................................................................ 34
[1] Refrigerant Circuit Diagram .................................................... 34
[2] Pump interlock ........................................................................ 35
[3] Functions of Principal Parts.................................................... 36
7 Control.......................................................................................... 38
[1] Dip Switch Functions and Their Factory Settings .................. 38
8 Test Run ...................................................................................... 41
[1] Check Items before Test Run.................................................. 41
[2] Test Run Method .................................................................... 41
[3] Refrigerant .............................................................................. 41
[4] Symptoms that do not Signify Problems ................................ 42
[5] Standard operation data ........................................................ 42
9 Troubleshooting ............................................................................ 43
[1] Check Code List .................................................................... 43
[2] Responding to Error Display on the Remote Controller ........ 44
[3] Troubleshooting Principal Parts .............................................. 60
[4] Maintenance .......................................................................... 74
0 LED display .................................................................................. 79
[1] LED Monitor Display .............................................................. 79
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