Daikin FTXG25JV1BW Service Manual

Also see for Inverter FTXG50JV1BS: Service manual Operation manual Service manual

Contents

Daikin FTXG25JV1BW Service Manual Manual pdf 83 page image

SiBE041012_AService Diagnosis 72Part 6Service Diagnosis1. Troubleshooting with LED .....................................................................741.1 Indoor Unit..............................................................................................741.2 Outdoor Unit ...........................................................................................742. Problem Symptoms and Measures .......................................................753. Service Check Function ........................................................................764. Troubleshooting ....................................................................................794.1 Error Codes and Description ..................................................................794.2 Indoor Unit PCB Abnormality .................................................................804.3 Freeze-up Protection Control or Heating Peak-cut Control....................824.4 Fan Motor (DC Motor) or Related Abnormality.......................................844.5 Thermistor or Related Abnormality (Indoor Unit)....................................864.6 Front Panel Open / Close Fault..............................................................874.7 Signal Transmission Error (between Indoor Unit and Outdoor Unit) ......884.8 Unspecified Voltage (between Indoor Unit and Outdoor Unit) ...............904.9 Outdoor Unit PCB Abnormality...............................................................914.10 OL Activation (Compressor Overload) ...................................................934.11 Compressor Lock ...................................................................................944.12 DC Fan Lock ..........................................................................................954.13 Input Overcurrent Detection ...................................................................964.14 Four Way Valve Abnormality..................................................................974.15 Discharge Pipe Temperature Control.....................................................994.16 High Pressure Control in Cooling .........................................................1004.17 Compressor System Sensor Abnormality ............................................1014.18 Position Sensor Abnormality ................................................................1034.19 DC Voltage / Current Sensor Abnormality (25/35 Class) .....................1064.20 CT or Related Abnormality (50 Class)..................................................1074.21 Thermistor or Related Abnormality (Outdoor Unit)...............................1094.22 Electrical Box Temperature Rise..........................................................1114.23 Radiation Fin Temperature Rise ..........................................................1134.24 Output Overcurrent Detection ..............................................................1154.25 Refrigerant Shortage ............................................................................1174.26 Low-voltage Detection or Over-voltage Detection................................1204.27 Signal Transmission Error on Outdoor Unit PCB (50 Class Only) .......1225. Check ..................................................................................................1235.1 Thermistor Resistance Check ..............................................................1235.2 Fan Motor Connector Check ................................................................1245.3 Power Supply Waveforms Check.........................................................1245.4 Electronic Expansion Valve Coil Check ...............................................1255.5 Four Way Valve Performance Check ...................................................1265.6 Inverter Unit Refrigerant System Check...............................................1265.7 “Inverter Checker” Check .....................................................................1275.8 Rotation Pulse Check on the Outdoor Unit PCB ..................................1295.9 Installation Condition Check.................................................................1305.10 Discharge Pressure Check...................................................................1305.11 Outdoor Fan System Check .................................................................131