Engineering manual
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Part II VRF system working and control elements
introduction
1 REFRIGERATION SYSTEM OUTLINE...........................................................................................................................35
2 INDOOR UNIT’S FAN CONTROL.....................................................................................................................................40
3 OUTDOOR UNIT’S FAN CONTROL..................................................................................................................................43
4 COMPRESSOR CONTROL..................................................................................................................................................46
5 EEV(ELECTRONIC EXPANSION VALVE) CONTROL..................................................................................................52
6 SYSTEM FAULTS AND PROTECTIONS...........................................................................................................................55