SiE-05C
Table of Contents i
Inverter K Series
Series
1. Introduction . ..........................................................................................ix
1.1 Safety Cautions .......................................................................................ix
1.2 PREFACE. ............................................................................................ xiii
Part1 General Information
Inverter K Series . ..............................................................1
1. Series Introduction . ................................................................................2
1.1 NOMENCLATURE . ................................................................................ 2
1.2 Indoor/Outdoor Unit Combinations. ........................................................ 4
2. Outline of System. ..................................................................................5
2.1 Easily Recognizable Features of the “K” Series...................................... 5
2.2 Changes in K Series Functions / Parts. .................................................. 6
2.3 Compatibility of Old and New VRV System Inverter................................ 9
Part2 Functions
Inverter K Series ..............................................................11
1. Functions...............................................................................................12
1.1 Outdoor Unit Refrigerant System Diagram............................................ 12
1.2 Function of Thermistors and Pressure Sensors .................................... 26
1.3 List of Safety Devices and Functinal Parts Setting Values.................... 27
1.4 Safety for Restart. ................................................................................. 28
1.5 Equalized Oil Level Operation
(Equalized Oil Level between Twin Compressors)................................ 30
1.6 Oil Return Operation. ............................................................................ 31
1.7 Defrost. ................................................................................................. 32
1.8 Heating Pump Down Residual Operation.............................................. 33
1.9 Step Down / Safety Control → Standby (Forced Thermostat OFF)
→ Stop Due to Malfunction. .................................................................. 35
1.10 Control During Low Outdoor Air Temperature Cooling. ........................ 37
1.11 Low Noise Control . ............................................................................... 39
1.12 Demand Control . .................................................................................. 40
1.13 Compressor Capacity Control . ............................................................. 41
1.14 Te / Tc Setting . ..................................................................................... 43
1.15 Gas Depletion Alarm . ........................................................................... 44
1.16 Drain Pump Control. ............................................................................. 45
1.17 Oil Temperature Sensor (8 and 10 Hp only). ........................................ 47
1.18 Louver Control for Preventing Ceiling Dirt. ........................................... 48
1.19 Thermostat Sensor in Remote Controller. ............................................ 49
1.20 Freeze Prevention . ............................................................................... 51
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