SiBE18-821_C
v Table of Contents
6. Troubleshooting for BP Unit................................................................376
6.1 Electronic Expansion Valve Abnormality..............................................376
6.2 BP Unit PCB Abnormality.....................................................................377
6.3 BP Liquid or Gas Pipe Thermistor Abnormality....................................378
6.4 Transmission Error between Indoor Unit and BP Unit..........................379
6.5 Transmission Error between Outdoor Unit and BP Unit.......................381
6.6 Check for BP Unit.................................................................................382
7. Troubleshooting for Outdoor Unit........................................................383
7.1 Outdoor Unit PCB Abnormality.............................................................383
7.2 Actuation of High Pressure Switch .......................................................384
7.3 Actuation of Low Pressure Sensor .......................................................386
7.4 Compressor Motor Lock .......................................................................388
7.5 Outdoor Fan Motor Abnormality ...........................................................389
7.6 Moving Part of Electronic Expansion Valve (Y1E, Y3E) Abnormality...390
7.7 Discharge Pipe Temperature Abnormality ...........................................392
7.8 Refrigerant Overcharged......................................................................393
7.9 Outdoor Temperature Thermistor (R1T) Abnormality ..........................394
7.10 Discharge Pipe Thermistor (R2T) Abnormality.....................................395
7.11 Suction Pipe Thermistor (R3T, R5T) Abnormality ................................396
7.12 Outdoor Heat Exchanger Thermistor (R4T) Abnormality .....................397
7.13 Outdoor Liquid Pipe Thermistor (R7T) Abnormality .............................398
7.14 Subcooling Heat Exchanger Gas Pipe Thermistor (R6T)
Abnormality ..........................................................................................399
7.15 High Pressure Sensor Abnormality ......................................................400
7.16 Low Pressure Sensor Abnormality .......................................................401
7.17 Outdoor Unit PCB Abnormality.............................................................402
7.18 Radiation Fin Temperature Rise ..........................................................403
7.19 Inverter Compressor Abnormality.........................................................404
7.20 Inverter Current Abnormality ................................................................405
7.21 Compressor Start-up Error ...................................................................406
7.22 High Voltage of Capacitor in Main Inverter Circuit ...............................407
7.23 Radiation Fin Thermistor Abnormality ..................................................408
7.24 Low Pressure Drop due to Refrigerant Shortage or
Electronic Expansion Valve Abnormality..............................................409
7.25 Power Supply Insufficient or Instantaneous Failure .............................411
7.26 Check Operation is not Conducted ......................................................412
7.27 Transmission Error between Remote Controller and Indoor Unit.........413
7.28 Transmission Error between Main and Sub Remote Controllers .........414
7.29 Transmission Error Between Indoor Unit and
Outdoor Unit in the Same System........................................................415
7.30 Excessive Number of Indoor Units .......................................................417
7.31 Address Duplication of Central Remote Controller...............................418
7.32 Transmission Error between Centralized Remote Controller and
Indoor Unit............................................................................................419
7.33 System is not Set yet............................................................................421
7.34 System Abnormality, Refrigerant System Address Undefined .............422
7.35 Check for Outdoor Unit.........................................................................423
8. Thermistor Resistance / Temperature Characteristics........................427
9. Pressure Sensor .................................................................................429
10.Method of Replacing Inverter’s Power Transistors Modules...............430
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