SiUS281811EA
Part 6 Service Diagnosis 195
4.29 Activation of High Pressure Switch .......................................................... 253
4.30 Activation of Low Pressure Sensor .......................................................... 255
4.31 Inverter Compressor Motor Lock.............................................................. 257
4.32 Outdoor Fan Motor Abnormality............................................................... 259
4.33 Electronic Expansion Valve Coil Abnormality........................................... 261
4.34 Discharge Pipe Temperature Abnormality ............................................... 262
4.35 Refrigerant Overcharged.......................................................................... 263
4.36 Thermistor Abnormality ............................................................................ 264
4.37 High Pressure Sensor Abnormality .......................................................... 265
4.38 Low Pressure Sensor Abnormality ........................................................... 266
4.39 PCB (for Inverter Compressor) Abnormality............................................. 267
4.40 Radiation Fin Temperature Rise Abnormality .......................................... 268
4.41 Inverter Compressor Instantaneous Overcurrent ..................................... 269
4.42 Inverter Compressor Overcurrent............................................................. 270
4.43 Inverter Compressor Startup Abnormality ................................................ 271
4.44
Transmission Error (Between Microcomputers on the Outdoor Main PCB)
... 272
4.45 Inverter Circuit Capacitor High Voltage.................................................... 273
4.46 Radiation Fin Thermistor Abnormality ...................................................... 274
4.47 Refrigerant Shortage ................................................................................ 275
4.48 Power Supply Insufficient or Instantaneous Abnormality ......................... 277
4.49 Check Operation Not Executed................................................................ 279
4.50 Transmission Error between Indoor Units and Outdoor Units.................. 280
4.51 Transmission Error between Remote Controller and Indoor Unit............. 282
4.52 Transmission Error between Main and Sub Remote Controllers ............. 283
4.53
Transmission Error between Indoor and Outdoor Units in the Same System
... 284
4.54 Improper Combination of Indoor and Outdoor Units, Indoor Units
and Remote Controller ............................................................................. 285
4.55 Incorrect Electric Heater Capacity Setting................................................ 287
4.56 Address Duplication of Centralized Controller.......................................... 288
4.57 Transmission Error between Centralized Controller and Indoor Unit ....... 289
4.58 System Not Set ........................................................................................ 290
4.59 System Abnormality, Refrigerant System Address Undefined ................. 291
5. Check ......................................................................................................292
5.1 High Pressure Check ............................................................................... 292
5.2 Low Pressure Check ................................................................................ 293
5.3 Superheat Operation Check..................................................................... 294
5.4 Power Transistor Check ........................................................................... 295
5.5 Refrigerant Overcharge Check................................................................. 296
5.6 Refrigerant Shortage Check..................................................................... 297
5.7 Vacuuming and Dehydration Procedure .................................................. 298
5.8 List of Inverter-Related Error Codes......................................................... 299
5.9 Concept of Inverter-Related Error Codes................................................. 300
5.10 Thermistor Check ..................................................................................... 301
5.11 Pressure Sensor Check ........................................................................... 304
5.12 Broken Wire Check of the Relay Wires .................................................... 305
5.13 Fan Motor Connector Check .................................................................... 306
5.14 Electronic Expansion Valve Coil Check ................................................... 308
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