ESIE09-08
ii Table of Contents
2.2 Compressor PI Control...........................................................................50
2.3 Electronic Expansion Valve PI Control R-410A circuit ...........................51
2.4 Electronic Expansion Valve PI Control R-134a circuit............................51
3. Special Control......................................................................................52
3.1 Startup Control .......................................................................................52
3.2 Defrosting Operation ..............................................................................53
3.3 Pump-down Residual Operation ............................................................54
3.4 Stopping Operation ................................................................................55
4. Protection Control .................................................................................56
4.1 High Pressure Protection Control...........................................................56
4.2 Low Pressure Protection Control............................................................58
4.3 Discharge Pipe Protection Control .........................................................60
4.4 Inverter Protection Control .....................................................................61
5. Other Control.........................................................................................63
5.1 Heating Operation Prohibition ................................................................63
5.2 Inverter Fan Control (Switch Box Fan) ...................................................63
5.3 Crankcase Heater ..................................................................................63
6. Outline of Control (Indoor Unit) .............................................................64
6.1 Freeze Prevention ..................................................................................64
6.2 Simultaneous demand of space heating and domestic water heating ...65
Part 6 - Test Operation................................................................. 71
1. Test Operation ......................................................................................72
1.1 Procedure and Outline ...........................................................................72
1.2 Air Tight Test and Vacuum Drying .........................................................74
1.3 Additional Refrigerant Charge ................................................................75
1.4 Operation when Power is Turned On .....................................................79
2. Outdoor Unit PC Board Layout .............................................................80
3. Field Setting ..........................................................................................81
3.1 Field Setting from remote control ...........................................................81
3.2 Field Setting from Outdoor Unit............................................................104
Part 7 - Troubleshooting............................................................. 115
1. Symptom-based Troubleshooting .......................................................117
2. Troubleshooting by Remote Control ...................................................119
2.1 The INSPECTION / TEST Button.........................................................119
2.2 Self-diagnosis by Wired Remote Control .............................................120
2.3 Operation of the Remote Controller’s Inspection / Test Operation
Button ...................................................................................................121
2.4 Remote Control Service Mode .............................................................122
2.5 Remote Controller Self-Diagnosis Function .........................................124
3. Troubleshooting by Indication on the Remote Controller ....................130
3.1 “A1” Indoor Unit: PC Board Defect .......................................................130
3.2 “A6” Indoor Unit: Pump Error (M1P) or Other Water System Error ......131
3.3 “A9” Indoor Unit: Malfunction of Moving Part of Electronic Expansion
Valve (K1E) R-410A circuit...................................................................132
3.4 “AJ” Indoor Unit: Malfunction of Capacity Determination Device .........134
3.5 “C1” Indoor Unit: Failure of Transmission (Between Indoor unit PC Board
and Control PC Board) .........................................................................135
3.6 “C4” Indoor Unit: Malfunction of Thermistor (R3T) Liquid Thermistor R-
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