Daikin R-410A Service Manual page 108

5. Troubleshooting by Indication on the Centralized Remote Controller.166
6. Troubleshooting by Indication on the Unified ON/OFF Controller.......172
7. Troubleshooting (OP: Schedule Timer)...............................................178
8. Check ..................................................................................................185
98
4.31 "L9" Outdoor Unit: Inverter Start up Error..............................................145
4.32 "LC" Outdoor Unit: Malfunction of Transmission between Inverter and Con-
trol PC Board146
4.33 "P4" Outdoor Unit: Malfunction of Inverter Radiating Fin Temperature Rise
Sensor148
4.34 "PJ" Outdoor Unit: Faulty Combination of Inverter and Fan Driver .......149
4.35 "UO" Low Pressure Drop Due to Refrigerant Shortage or Electronic Expan-
sion Valve Failure150
4.36 "U2" Power Supply Insufficient or Instantaneous Failure ......................151
4.37 "U3" Check Operation not Executed......................................................153
4.38 "U4" Malfunction of Transmission between Indoor Units and Outdoor Units
154
4.39 "U5" Malfunction of Transmission between Remote Controller and Indoor
Unit156
4.40 "U8" Malfunction of Transmission between Master and Slave Remote Con-
trollers157
4.41 "U9" Malfunction of Transmission between Indoor and Outdoor Units in the
Same System158
4.42 "UA" Excessive Number of Indoor Units ................................................160
4.43 "UC" Address Duplication of Central Remote Controller ........................161
4.44 "UE" Malfunction of Transmission between Central Remote Controller and
Indoor Unit162
4.45 "UF" Refrigerant System not Set, Incompatible Wiring/Piping ...............164
4.46 "UH" Malfunction of System, Refrigerant System Address Undefined...165
5.1 "UE" Malfunction of Transmission between Centralized Remote Controller
and Indoor Unit166
5.2 "M1" PC Board Defect ............................................................................167
5.3 "M8" Malfunction of Transmission between Optional Controllers for Cen-
tralized Control168
5.4 "MA" Improper Combination of Optional Controllers for Centralized Control
169
5.5 "MC" Address Duplication, Improper Setting ..........................................171
6.1 Operation Lamp Blinks .........................................................................172
6.2 Display "Under Host Computer Integrate Control" Blinks (Repeats Single
Blink)174
6.3 Display "Under Host Computer Integrate Control" Blinks (Repeats Double
Blink)177
7.1 "UE" Malfunction of Transmission between Central Remote Controller and
Indoor Unit178
7.2 "M1" PC Board Defect ............................................................................180
7.3 "M8" Malfunction of Transmission between Optional Controllers for Cen-
tralized Control181
7.4 "MA" Improper Combination of Optional Controllers for Centralized Control
182
7.5 "MC" Address Duplication, Improper Setting ..........................................184
SiBE39-402A
Troubleshooting