Panasonic Urban Multi MX1R Series, Service Manual, Page: 30 / 643

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Function Urban Multi “MX1, ME1 Series” Using R-22 9
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1. Function ................................................................................................10
1.1 Outdoor Unit Refrigerant System Diagram.............................................10
1.2 List of Safety Devices and Functional Parts Setting Values...................18
1.3 Flow of Refrigerant in Each Operation Mode (ME1 Series) ...................20
1.4 Outline of Control (ME1 Series) .............................................................25
1.5 Safety for Restart ...................................................................................27
1.6 Equalized Oil Level Operation
(Equalized Oil Level between Twin Compressors).................................30
1.7 Oil Return Operation ..............................................................................31
1.8 Defrost....................................................................................................33
1.9 Pressure Equalization Control (ME1 Series) ..........................................36
1.10 Frequency Limit Control by Pressure Equalization (ME1 Series) ..........37
1.11 HR Changeover Control (ME1 Series) ...................................................38
1.12 Pump Down Residual Operation ............................................................39
1.13 Step Down / Safety Control
→
Standby (Forced Thermostat OFF)
→
Stop Due to Malfunction .....................................................................42
1.14 Control During Low Outdoor Air Temperature Cooling ..........................45
1.15 Low Noise Control ..................................................................................47
1.16 Demand Control .....................................................................................48
1.17 Compressor Capacity Control ................................................................49
1.18 Te / Tc Setting ........................................................................................50
1.19 Gas Depletion Alarm ..............................................................................51
1.20 Drain Pump Control................................................................................52
1.21 Oil Temperature Sensor (8 and 10 Hp only) ..........................................54
1.22 Louver Control for Preventing Ceiling Dirt..............................................55
1.23 Thermostat Sensor in Remote Controller ...............................................56
1.24 Freeze Prevention ..................................................................................58