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Chapter 5 Control - Mitsubishi Electric PURY-HP72 Service Handbook

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Table of Contents
Chapter 5
Control
5-1
Dipswitch Functions and Factory Settings .................................................................................... 117
5-1-1
Outdoor Unit Switch Functions and Factory Settings ......................................................................... 117
5-1-2
Indoor Unit Switch Functions and Factory Settings ............................................................................ 121
5-1-3
Remote Controller Switch Functions and Factory Settings................................................................. 122
5-1-4
BC Controller Switch Settings............................................................................................................. 123
5-2
Outdoor Unit Control ........................................................................................................................ 124
5-2-1
Overview ............................................................................................................................................. 124
5-2-2
Rotation Control .................................................................................................................................. 124
5-2-3
Initial Control ....................................................................................................................................... 124
5-2-4
Startup Control.................................................................................................................................... 124
5-2-5
Refrigerant Bypass Control................................................................................................................. 125
5-2-6
Frequency Control .............................................................................................................................. 126
5-2-7
Defrost Operation Control ................................................................................................................... 127
5-2-8
ON-defrost operation control............................................................................................................... 129
5-2-9
Refrigerant Recovery Control ............................................................................................................. 129
5-2-10 Oil recovery during compressor operation at low frequency............................................................... 130
5-2-11 Outdoor Unit Fan Control.................................................................................................................... 130
5-2-12 Compressor discharge superheat control (expansion valve )................................................ 131
5-2-13 Evaporation Temperature Control (Expansion Valves )....................................................... 131
5-2-14 Control at Initial Startup ...................................................................................................................... 131
5-2-15 Emergency Operation Mode ............................................................................................................... 133
5-2-16 Unit Control Scheme........................................................................................................................... 135
5-2-17 Refrigerant Circuits and Refrigerant Cycle Diagrams ......................................................................... 136
5-2-18 Operation Mode .................................................................................................................................. 137
5-2-19 Demand Control.................................................................................................................................. 138
5-3
BC Controller Control....................................................................................................................... 139
5-4
Operation Flowcharts ....................................................................................................................... 140
5-4-1
Operation Sequence Flowchart .......................................................................................................... 140
5-4-2
Actions Performed in Different Modes ................................................................................................ 143
HWE13080
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