SiUS181305E
Table of Contents v
5.7 Signal Transmission Error between Remote Controller and Indoor Unit.. 173
5.8 Signal Transmission Error between MAIN Remote Controller and
SUB Remote Controller............................................................................ 174
5.9 Field Setting Abnormality ......................................................................... 175
6. Troubleshooting for Branch Provider (BP) Unit.......................................176
6.1 Electronic Expansion Valve Abnormality.................................................. 176
6.2 Branch Provider (BP) Unit PCB Abnormality............................................ 177
6.3 Branch Provider (BP) Liquid or Gas Pipe Thermistor Abnormality........... 178
6.4 Signal transmission Error between Indoor Unit and
Branch Provider (BP) Unit ........................................................................ 179
6.5 Trans mi ss io n Err or between Outdoor Unit an d
Branch Provider (BP) Unit ........................................................................ 181
6.6 Check for Branch Provider (BP) Unit........................................................ 182
7. Troubleshooting for Outdoor Unit............................................................183
7.1 Outdoor Unit PCB Abnormality................................................................. 183
7.2 Actuation of High Pressure Switch ........................................................... 184
7.3 Actuation of Low Pressure Sensor ........................................................... 186
7.4 Compressor Motor Lock ........................................................................... 188
7.5 Outdoor Fan Motor Abnormality............................................................... 189
7.6 Moving Part of Electronic Expansion Valve (Y1E, Y3E) Abnormality....... 190
7.7 Discharge Pipe Temperature Abnormality ............................................... 192
7.8 Refrigerant Overcharged.......................................................................... 193
7.9 Outdoor Temperature Thermistor (R1T) Abnormality .............................. 194
7.10 Discharge Pipe Thermistor (R2T) Abnormality......................................... 195
7.11 Suction Pipe Thermistor (R3T, R5T) Abnormality .................................... 196
7.12 Outdoor Heat Exchanger Thermistor (R4T) Abnormality ......................... 197
7.13 Outdoor Liquid Pipe Thermistor (R7T) Abnormality ................................. 198
7.14 Subcooling Heat Exchanger Gas Pipe Thermistor (R6T) Abnormality..... 199
7.15 High Pressure Sensor Abnormality .......................................................... 200
7.16 Low Pressure Sensor Abnormality ........................................................... 201
7.17 Outdoor Unit PCB Abnormality................................................................. 202
7.18 Radiation Fin Temperature Rise .............................................................. 203
7.19 Inverter Compressor Abnormality............................................................. 204
7.20 Inverter Current Abnormality .................................................................... 205
7.21 Compressor Start-up Error ....................................................................... 206
7.22 High Voltage of Capacitor in Main Inverter Circuit ................................... 207
7.23 Radiation Fin Thermistor Abnormality ...................................................... 208
7.24 Low Pressure Drop due to Refrigerant Shortage or Electronic Expansion
Valve Abnormality .................................................................................... 209
7.25 Power Supply Insufficient or Instantaneous Failure ................................. 211
7.26 Check Operation is not Conducted .......................................................... 212
7.27 Signal transmission Error between Indoor Unit and Outdoor Unit in the Same
System ..................................................................................................... 213
7.28 Excessive Number of Indoor Units ........................................................... 214
7.29 Address Duplication of Central Remote Controller................................... 215
7.30 Transmission Error between Centralized Remote Controller
and Indoor Unit......................................................................................... 216
7.31 System is not Set yet................................................................................ 218
7.32 System Abnormality, Refrigerant System Address Undefined ................. 219
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