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SiUS041829E

iii Table of Contents

4.25 Output Overcurrent Detection .................................................................. 109

5. Check ......................................................................................................112

5.1 Thermistor Resistance Check .................................................................. 112

5.2 Indoor Fan Motor Connector Check......................................................... 113

5.3 Power Supply Waveform Check............................................................... 113

5.4 Electronic Expansion Valve Check........................................................... 114

5.5 Four Way Valve Performance Check ....................................................... 115

5.6 Inverter Unit Refrigerant System Check................................................... 115

5.7 Inverter Analyzer Check........................................................................... 116

5.8 Rotation Pulse Check on the Outdoor Unit PCB ...................................... 117

5.9 Installation Condition Check..................................................................... 118

5.10 Discharge Pressure Check....................................................................... 119

5.11 Outdoor Fan System Check ..................................................................... 119

5.12 Main Circuit Short Check.......................................................................... 120

5.13 Power Module Check ............................................................................... 122

Part 7 Trial Operation and Field Settings ..................................... 124

1. Pump Down Operation............................................................................125

2. Forced Cooling Operation .......................................................................126

3. Trial Operation ........................................................................................127

4. Field Settings ..........................................................................................129

4.1 Temperature Display Switch .................................................................... 129

4.2 When 2 Units are Installed in 1 Room...................................................... 129

4.3 Jumper and Switch Settings..................................................................... 130

4.4 Facility Setting (cooling at low outdoor temperature) ............................... 131

5. Silicone Grease on Power Transistor/Diode Bridge................................132

Part 8 Appendix ............................................................................. 133

1. Piping Diagrams......................................................................................134

1.1 Indoor Unit................................................................................................ 134

1.2 Outdoor Unit ............................................................................................. 135

2. Wiring Diagrams......................................................................................136

2.1 Indoor Unit................................................................................................ 136

3. Outdoor Unit............................................................................................137

4. Operation Limit........................................................................................139

Daikin FTXR-T Series Service Manual

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