Part 5 - Function - Daikin ALTHERMA HT Service Manual

ESIE09-08B
1. Operation Mode ....................................................................................46
2. Basic Control.........................................................................................47
3. Special Control......................................................................................50
4. Protection Control .................................................................................54
5. Other Control.........................................................................................61
6. Outline of Control (Indoor Unit) .............................................................62
Function

Part 5 - Function

2.1 Normal Operation ...................................................................................47
2.2 Compressor PI Control...........................................................................48
2.3 Electronic Expansion Valve PI Control R-410A circuit ...........................49
2.4 Electronic Expansion Valve PI Control R-134a circuit............................49
3.1 Startup Control .......................................................................................50
3.2 Defrosting Operation ..............................................................................51
3.3 Pump-down Residual Operation ............................................................52
3.4 Stopping Operation ................................................................................53
4.1 High Pressure Protection Control...........................................................54
4.2 Low Pressure Protection Control............................................................56
4.3 Discharge Pipe Protection Control .........................................................58
4.4 Inverter Protection Control .....................................................................59
5.1 Heating Operation Prohibition ................................................................61
5.2 Inverter Fan Control (Switch Box Fan) ...................................................61
5.3 Crankcase Heater ..................................................................................61
6.1 Freeze Prevention ..................................................................................62
6.2 Simultaneous demand of space heating and domestic water heating ...63
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