Hitachi RCME-AH1, Service Manual

Page: 6 / 174

SMGB0082 rev.1 - 07/2015
IV
General Index
2.2.4 Overcurrent protection control ....................................................................................................................... 48
2.2.5 Defrosting (only for air-cooled heat pump systems (RHME)) ........................................................................ 49
2.3 Control of Master/Slave group...............................................................................................................52
2.3.1 Summary of control of Master/Slave group ................................................................................................... 52
2.3.2 Setting method .............................................................................................................................................. 52
2.3.3 Operation method .......................................................................................................................................... 53
2.3.4 Other functions of the control of Master/Slave group .................................................................................... 56
2.3.5 Setting items .................................................................................................................................................. 58
2.3.6 Method for setting and confirmation of operation conditions through the LCD screen .................................. 59
2.4 Run operation ........................................................................................................................................61
2.4.1 Setting of switches on the setting PCB ......................................................................................................... 61
2.4.2 Operation control of the module .................................................................................................................... 62
2.5 Time chart .............................................................................................................................................63
3. Servicing ...................................................................................................................67
3.1 LCD display for Service Menu ...............................................................................................................69
3.2 General notes ........................................................................................................................................77
3.3 Access inside the module for servicing .................................................................................................77
3.4 Removing covers...................................................................................................................................78
3.4.1 Unit description .............................................................................................................................................. 78
3.4.2 Panels on the left (2 panels) or right side (2 panels). .................................................................................... 79
3.4.3 Front cover (E-Box - compressor side) ......................................................................................................... 79
3.4.4 Front cover (Hex lower cover) ....................................................................................................................... 80
3.4.5 Rear cover (water connection side) ............................................................................................................... 80
3.4.6 Water pipes support ...................................................................................................................................... 81
3.4.7 Protection net (Air cooler grille) ..................................................................................................................... 82
3.5 Cycle components .................................................................................................................................83
3.5.1 Compressor removal ..................................................................................................................................... 83
3.5.2 Overhaul work ............................................................................................................................................... 85
3.5.3 Recovering the refrigerant ............................................................................................................................ 86
3.5.4 Replacement of the Brazed plate heat exchanger ........................................................................................ 87
3.5.5 Replacement of the expansion valve ............................................................................................................ 89
3.5.6 Replacement of the check valve ................................................................................................................... 90
3.5.7 Filter drier ...................................................................................................................................................... 91
3.5.8 Replacement of the stop valve (with check joint) .......................................................................................... 92
3.5.9 Replacement of the high pressure switch (PSH) ........................................................................................... 92
3.5.10 Replacement of the pressure sensor (Pd) ................................................................................................... 92
3.5.11 Replacement of the pressure sensor (Ps) ................................................................................................... 92
3.5.12 Replacement of the pressure sensor (PSW) ............................................................................................... 93