Daikin RXYSQ4-5-6PA7V1B Service Manual page 135

4. Troubleshooting by Indication on
5. Troubleshooting by Indication on the Unified ON/OFF Controller.......212
124
3.29 "J6" Outdoor Unit: Malfunction of Thermistor (R6T) .............................177
3.30 "J7" Outdoor Unit: Malfunction of Thermistor (R7T) for
Outdoor Unit Liquid Pipe ......................................................................178
3.31 "J9" Outdoor Unit: Malfunction of Thermistor (R4T) .............................179
3.32 "JA" Outdoor Unit: Malfunction of High Pressure Sensor......................180
3.33 "JC" Outdoor Unit: Malfunction of Low Pressure Sensor ......................181
3.34 "L1" Outdoor Unit: Malfunction of PC Board .........................................182
3.35 "L4" Outdoor Unit: Malfunction of Inverter Radiating Fin
Temperature Rise.................................................................................183
3.36 "L5" Outdoor Unit: Inverter Compressor Abnormal ...............................184
3.37 "L8" Outdoor Unit: Inverter Current Abnormal.......................................185
3.38 "L9" Outdoor Unit: Inverter Start up Error .............................................186
3.39 "LC" Outdoor Unit: Malfunction of Transmission between
Inverter and Control PC Board .............................................................187
3.40 "P1" Outdoor Unit: High Voltage of Capacitor in
Main Inverter Circuit .............................................................................188
3.41 "U0" Low Pressure Drop Due to Refrigerant Shortage or
Electronic Expansion Valve Failure......................................................189
3.42 "U2" Power Supply Insufficient or Instantaneous Failure ......................191
3.43 "U3" Check Operation not Executed......................................................193
3.44 "U4" Malfunction of Transmission between Indoor Units and
Outdoor Units .......................................................................................194
3.45 "U5" Malfunction of Transmission between Remote Controller and
Indoor Unit............................................................................................196
3.46 "U8" Malfunction of Transmission between Main and Sub Remote
Controllers ............................................................................................197
3.47 "U9" Malfunction of Transmission between Indoor and Outdoor Units
in the Same System .............................................................................198
3.48 "UA" Excessive Number of Indoor Units ................................................200
3.49 "UC" Address Duplication of Central Remote Controller........................201
3.50 "UE" Malfunction of Transmission between
Central Remote Controller and Indoor Unit ..........................................202
3.51 "UF" System is not Set yet.....................................................................204
3.52 "UH" Malfunction of System, Refrigerant System Address Undefined...205
the Centralized Remote Controller......................................................206
4.1 "UE" Malfunction of Transmission between
Centralized Remote Controller and Indoor Unit ...................................206
4.2 "M1" PC Board Defect ...........................................................................207
4.3 "M8" Malfunction of Transmission between
Optional Controllers for Centralized Control........................................208
4.4 "MA" Improper Combination of Optional Controllers for
Centralized Control...............................................................................209
4.5 "MC" Address Duplication, Improper Setting .........................................211
5.1 Operation Lamp Blinks .........................................................................212
5.2 Display "Under Host Computer Integrate Control" Blinks
(Repeats Single Blink)..........................................................................214
5.3 Display "Under Host Computer Integrate Control" Blinks
(Repeats Double Blink) ........................................................................217
SiBE34-802
Troubleshooting