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3. Troubleshooting (OP: Central Remote Controller) ..............................218
4. Troubleshooting (OP: Schedule Timer)...............................................224
5. Troubleshooting (OP: Unified ON/OFF Controller) .............................231
142
Fin Temperature Rise...........................................................................191
2.32 "L5" Outdoor Unit: Inverter Compressor Abnormal ...............................192
2.33 "L8" Outdoor Unit: Inverter Current Abnormal.......................................193
2.34 "L9" Outdoor Unit: Inverter Start up Error..............................................194
Between Inverter and Control PC Board ..............................................195
2.36 "P1" Outdoor Unit: Inverter Over-Ripple Protection ...............................197
Fin Temperature Rise Sensor ..............................................................198
2.38 "UO" Low Pressure Drop Due to Refrigerant Shortage or
Electronic Expansion Valve Failure......................................................199
2.40 "U2" Power Supply Insufficient or Instantaneous Failure ......................201
2.41 "U3" Check Operation not executed ......................................................203
2.42 "U4" Malfunction of Transmission Between Indoor Units ......................204
2.43 "U5" Malfunction of Transmission Between Remote
Controller and Indoor Unit ....................................................................206
2.44 "U7" Malfunction of Transmission Between Outdoor Units....................207
2.45 "U8" Malfunction of Transmission Between Master and
Slave Remote Controllers ....................................................................209
2.46 "U9" Malfunction of Transmission Between Indoor and
Outdoor Units in the Same System ......................................................210
2.47 "UA" Excessive Number of Indoor Units ................................................212
2.48 "UC" Address Duplication of Central Remote Controller ........................213
Controller and Indoor Unit ....................................................................214
2.50 "UF" Refrigerant System not Set, Incompatible Wiring/Piping ...............216
Central Remote Controller and Indoor Unit ..........................................218
3.2 "M1" PC Board Defect ............................................................................219
Optional Controllers for Centralized Control.........................................220
Centralized Control...............................................................................221
3.5 "MC" Address Duplication, Improper Setting ..........................................223
4.1 "UE" Malfunction of Transmission Between Central
Remote Controller and Indoor Unit.......................................................224
4.2 "M1" PC Board Defect ............................................................................226
Controllers for Centralized Control .......................................................227
4.4 "MA" Improper Combination of Optional Controllers for
Centralized Control...............................................................................228
4.5 "MC" Address Duplication, Improper Setting ..........................................230
5.1 Operation Lamp Blinks .........................................................................231
(Repeats Single Blink)..........................................................................233
(Repeats Double Blink) ........................................................................236
Si39-302
Troubleshooting
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Table of Contents
Troubleshooting
