Daikin VRV III REYQ8PY1 Service Manual

Also see for VRV III REYQ10PY1: Installation manual

Contents

Daikin VRV III REYQ8PY1 Service Manual Manual pdf 106 page image

Si37-701Function 95Part 4Function1. Function General...................................................................................961.1 Symbol ...................................................................................................961.2 Operation Mode......................................................................................982. Basic Control.........................................................................................992.1 Normal Operation ...................................................................................992.2 Compressor PI Control.........................................................................1002.3 Electronic Expansion Valve PI Control.................................................1082.4 Step Control of Outdoor Unit Fans .......................................................1082.5 Outdoor Unit Fan Control in Cooling Operation ...................................1092.6 Heat Exchanger Control .......................................................................1103. Special Control....................................................................................1113.1 Startup Control .....................................................................................1113.2 Large Capacity Start Up Control (Heating)...........................................1133.3 Oil Return Operation ............................................................................1143.4 Defrost Operation .................................................................................1183.5 Pump-down Residual Operation ..........................................................1203.6 Standby ................................................................................................1223.7 Stopping Operation ..............................................................................1234. Protection Control ...............................................................................1244.1 High Pressure Protection Control.........................................................1244.2 Low Pressure Protection Control..........................................................1264.3 Discharge Pipe Protection Control .......................................................1284.4 Inverter Protection Control ...................................................................1294.5 STD Compressor Overload Protection.................................................1315. Other Control.......................................................................................1325.1 Backup Operation.................................................................................1325.2 Demand Operation ...............................................................................1325.3 Heating Operation Prohibition ..............................................................1326. Outline of Control (Indoor Unit) ...........................................................1336.1 Operation Flow Chart ...........................................................................1336.2 Thermostat Control...............................................................................1356.3 Drain Pump Control..............................................................................1396.4 Control of Electronic Expansion Valve .................................................1416.5 Freeze Prevention ................................................................................1426.6 Heater Control (Optional PC Board KRP1B...is required.) ...................1436.7 List of Swing Flap Operations ..............................................................1446.8 Hot Start Control (In Heating Operation Only)......................................1456.9 Louver Control for Preventing Ceiling Dirt............................................146