Specifications

Si30-813
152 Troubleshooting
2.28 “
J7
” Malfunction of Liquid Pipe Thermistor (R6T) .................................211
2.29 “
J9” Malfunction of Sub Cooling Heat Exchanger Outlet Thermistor
(R5T) ....................................................................................................212
2.30 “JA
” Outside Unit: Malfunction of Discharge Pipe Pressure Sensor .....213
2.31 “
JC” Outside Unit: Malfunction of Suction Pipe Pressure Sensor .........214
2.32 “
L4” Outside Unit: Malfunction of Inverter Radiating Fin
Temperature Rise (R1T) ......................................................................215
2.33 “
L5” Outside Unit: Inverter Compressor Abnormal................................216
2.34 “
L8” Outside Unit: Inverter Current Abnormal .......................................217
2.35 “
L9
” Outside Unit: Inverter Start Up Error .............................................218
2.36 “
LC” Outside Unit: Malfunction of Transmission between
Inverter and Control PC Board .............................................................219
2.37 “P1
” Outside Unit: Inverter Over-Ripple Protection ...............................221
2.38 “
P4” Outside Unit: Malfunction of Inverter Radiating Fin
Temperature Sensor ............................................................................222
2.39 “U0
” Low Pressure Drop Due to Refrigerant Shortage or
Electronic Expansion Valve Failure......................................................223
2.40 “
U1
” Reverse Phase, Open Phase ........................................................225
2.41 “
U2
” Power Supply Insufficient or Instantaneous Failure ......................226
2.42 “
U3” Check Operation not Executed......................................................228
2.43 “
U4” Malfunction of Transmission between Indoor Units.......................229
2.44 “
U5
” Malfunction of Transmission between Remote
Controller and Indoor Unit ....................................................................231
2.45 “U7” Malfunction of Transmission between Outside Units.....................232
2.46 “
U8
” Malfunction of Transmission between Master and
Slave Remote Controllers ....................................................................234
2.47 “U9
” Malfunction of Transmission between Indoor and
Outside Units in the Same System.......................................................235
2.48 “UA
” Indoor & Outside Units and Remote Controller
Combination Failure .............................................................................237
2.49 “
UC
” Address Duplication of Centralized Controller...............................238
2.50 “
UE
” Malfunction of Transmission between Centralized
Controller and Indoor Unit ....................................................................239
2.51 “
UF
” Refrigerant System not Set, Incompatible Wiring/Piping...............241
2.52 “
UH
” Malfunction of System, Refrigerant System
Address Undefined...............................................................................242
3. Troubleshooting (OP: Central Remote Controller) ..............................243
3.1 “
M1
” PC Board Defect ...........................................................................243
3.2 “
M8
” Malfunction of Transmission between Optional
Controllers for Centralized Control .......................................................244
3.3 “MA
” Improper Combination of Optional Controllers for
Centralized Control...............................................................................245
3.4 “MC
” Address Duplication, Improper Setting .........................................247
4. Troubleshooting (OP: Schedule Timer)...............................................248
4.1 “
UE
” Malfunction of Transmission between Centralized
Controller and Indoor Unit ....................................................................248
4.2 “
M1
” PC Board Defect ...........................................................................250
4.3 “
M8
” Malfunction of Transmission between Optional
Controllers for Centralized Control .......................................................251
4.4 “
MA
” Improper Combination of Optional Controllers for
Centralized Control...............................................................................252
4.5 “MC
” Address Duplication, Improper Setting .........................................254