Mini UM S/MTable of Contents iii4.16 “E4” Outdoor Unit: Actuation of Low Pressure Switch .......................... 1224.17 “E5” Compressor Motor Lock................................................................ 1234.18 “E7” Malfunction of Outdoor Unit Fan Motor ......................................... 1244.19 “E9” Outdoor Unit: Malfunction of Moving Part ofElectronic Expansion Valve ................................................................. 1264.20 “F3” Outdoor Unit: Abnormal Discharge Pipe Temperature ................. 1284.21 “H9” Outdoor Unit: Malfunction of Thermistor for Outdoor Air (R1T).... 1294.22 “J3” Outdoor Unit: Malfunction of Discharge Pipe Thermistor (R3T) ... 1304.23 “J5” Outdoor Unit: Malfunction of Thermistor (R2T) for Suction Pipe .. 1314.24 “J6” Outdoor Unit: Malfunction of Thermistor (R4T) forOutdoor Unit Heat Exchanger ............................................................. 1324.25 “J9” Malfunction of Receiver Gas Pipe Thermistor (R5T) .................... 1334.26 “JA” Outdoor Unit: Malfunction of High Pressure Sensor..................... 1344.27 “JC” Outdoor Unit: Malfunction of Low Pressure Sensor...................... 1354.28 “L4” Outdoor Unit: Malfunction of Inverter Radiating FinTemperature Rise................................................................................ 1364.29 “L5” Outdoor Unit: Inverter Compressor Abnormal .............................. 1374.30 “L8” Outdoor Unit: Inverter Current Abnormal ...................................... 1384.31 “L9” Outdoor Unit: Inverter Start up Error............................................. 1394.32 “LC” Outdoor Unit: Malfunction of Transmission between Inverter andControl PC Board ................................................................................ 1404.33 “P4” Outdoor Unit: Malfunction of Inverter Radiating FinTemperature Rise Sensor ................................................................... 1424.34 “PJ” Outdoor Unit: Faulty Combination of Inverter and Fan Driver ...... 1434.35 “UO” Low Pressure Drop Due to Refrigerant Shortage orElectronic Expansion Valve Failure ..................................................... 1444.36 “U2” Power Supply Insufficient or Instantaneous Failure ..................... 1454.37 “U3” Check Operation not Executed..................................................... 1474.38 “U4” Malfunction of Transmission between Indoor Units andOutdoor Units ...................................................................................... 1484.39 “U5” Malfunction of Transmission between Remote Controller andIndoor Unit ........................................................................................... 1504.40 “U8” Malfunction of Transmission between Master andSlave Remote Controllers.................................................................... 1514.41 “U9” Malfunction of Transmission between Indoor andOutdoor Units in the Same System ..................................................... 1524.42 “UA” Excessive Number of Indoor Units ............................................... 1544.43 “UC” Address Duplication of Central Remote Controller ....................... 1554.44 “UE” Malfunction of Transmission between Central Remote Controller andIndoor Unit ........................................................................................... 1564.45 “UF” Refrigerant System not Set, Incompatible Wiring/Piping .............. 1584.46 “UH” Malfunction of System, Refrigerant System Address Undefined.. 1595. Troubleshooting by Indication on the Centralized Remote Controller.1605.1 “UE” Malfunction of Transmission between Centralized Remote Controllerand Indoor Unit .................................................................................... 1605.2 “M1” PC Board Defect ........................................................................... 1615.3 “M8” Malfunction of Transmission between Optional Controllers forCentralized Control.............................................................................. 1625.4 “MA” Improper Combination of Optional Controllers forCentralized Control.............................................................................. 1635.5 “MC” Address Duplication, Improper Setting ......................................... 165
