Control System - Hitachi FSG1 Series Technical Catalogue

9. CONTROL SYSTEM

CONTENTS
9. CONTROL SYSTEM _______________________________________________________ 1
9.1. Device Control System _____________________________________________________ 2
9.1.1. RAS-5~20FSG ____________________________________________________________ 2
9.1.2. RAS-24/30FSG1___________________________________________________________ 3
9.1.3. RAS-8/10FXG_____________________________________________________________ 4
9.1.4. RAS-20/30FXG1___________________________________________________________ 5
9.2. Indoor Unit PCB __________________________________________________________ 6
9.2.1. Printed Circuit board Layout (except RPK) ______________________________________ 6
9.2.2. Printed Circuit board Layout (only RPK) ________________________________________ 7
9.2.3. Dip Switch Setting _________________________________________________________ 8
9.3. Outdoor Unit PCB _________________________________________________________ 9
9.3.1. Printed Circuit Board Layout__________________________________________________ 9
9.3.2. Dip Switch Setting ________________________________________________________ 10
9.4. Protection and Safety Control _______________________________________________ 12
9.5. Safety and Control Device Setting____________________________________________ 12
9.6. Standard Operation Sequence ______________________________________________ 13
9.6.1. Cooling Operation (FSG, FSG1) _____________________________________________ 13
9.6.2. Cooling (mainly cooling) Operation (FXG, FXG1) ________________________________ 15
9.6.3. Dry Operation (FSG, FSG1) _________________________________________________ 17
9.6.4. Dry Operation (FXG, FXG1) _________________________________________________ 19
9.6.5. Heating Operation (FSG, FSG1) _____________________________________________ 21
9.6.6. Heating (mainly Heating) Operation (FXG, FXG1)________________________________ 23
9.7. Standard Control Functions_________________________________________________ 26
9.7.1. Freezing Protection Control during Cooling or Dry Operation _______________________ 26
9.7.2. Gas Bypass Control _______________________________________________________ 27
9.7.3. Over Heating Protection Control _____________________________________________ 27
9.7.4. Control of Expansion Valve for Plate Heat Exchange _____________________________ 28
9.7.5. Compressor Running Control ________________________________________________ 29
9.7.6. Control for Auto Cool/Heat Operation _________________________________________ 30
CONTROL SYSTEM
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