Service manual

SiUS28-902_a
iii Table of Contents
3.9 “C4” Indoor Unit: Malfunction of Thermistor (R2T) for
Heat Exchanger .....................................................................................96
3.10 “C5” Indoor Unit: Malfunction of Thermistor (R3T) for Gas Pipes ...........97
3.11 “C9” Indoor Unit: Malfunction of Thermistor (R1T) for Suction Air ..........98
3.12 “CA” Indoor Unit: Malfunction of Thermistor for Discharge Air ................ 99
3.13 “CJ” Indoor Unit: Malfunction of
Thermostat Sensor in Remote Controller ............................................100
3.14 “E1” Outdoor Unit: P.C.B. Defect .......................................................... 101
3.15 “E3” Outdoor Unit: Actuation of High Pressure Switch .........................102
3.16 “E4” Outdoor Unit: Actuation of Low Pressure Sensor .........................104
3.17 “E5” Inverter Compressor Motor Lock................................................... 106
3.18 “E7” Malfunction of Outdoor Unit Fan Motor .........................................108
3.19 “E9” Outdoor Unit: Malfunction of Moving Part of
Electronic Expansion Valve (Y1E) .......................................................109
3.20 “F3” Outdoor Unit: Abnormal Discharge Pipe Temperature .................111
3.21 “F6” Outdoor Unit: Refrigerant Overcharged ........................................112
3.22 “H9” Outdoor Unit: Malfunction of Thermistor (R1T) for Outdoor Air ....113
3.23 “J3” Outdoor Unit: Malfunction of Discharge Pipe Thermistor (R2T)....114
3.24 “J5” Outdoor Unit: Malfunction of Thermistor (R3T, R5T) for
Suction Pipe 1, 2 .................................................................................. 115
3.25 “J6” Outdoor Unit: Malfunction of Thermistor (R4T) for
Outdoor Unit Heat Exchanger..............................................................116
3.26 “JA” Outdoor Unit: Malfunction of High Pressure Sensor .....................117
3.27 “JC” Outdoor Unit: Malfunction of Low Pressure Sensor ......................119
3.28 “L1” Outdoor Unit: Malfunction of P.C.B. ..............................................121
3.29 “L4” Outdoor Unit: Malfunction of
Inverter Radiating Fin Temperature Rise............................................. 122
3.30 “L5” Outdoor Unit: Inverter Compressor Abnormal...............................123
3.31 “L8” Outdoor Unit: Inverter Current Abnormal ...................................... 124
3.32 “L9” Outdoor Unit: Inverter Start up Error .............................................126
3.33 “LC” Outdoor Unit: Malfunction of Transmission between
Inverter and Control P.C.B...................................................................127
3.34 “P4” Outdoor Unit: Malfunction of
Inverter Radiating Fin Temperature Rise Sensor................................. 128
3.35 “U0” Outdoor Unit: Low Pressure Drop Due to Refrigerant Shortage or
Electronic Expansion Valve Failure .....................................................129
3.36 “U2” Power Supply Insufficient or Instantaneous Failure ......................131
3.37 “U3” Check Operation not Executed ..................................................... 133
3.38 “U4” Malfunction of Transmission between
Indoor Units and Outdoor Units ...........................................................134
3.39 “
U5” Malfunction of Transmission between
Remote Controller and Indoor Unit ......................................................136
3.40 “U8” Malfunction of Transmission between
Main and Sub Remote Controllers.......................................................137
3.41 “UE” Malfunction of Transmission between
Centralized Remote Controller and Indoor Unit ...................................138
3.42 “UF” System is not Set yet .................................................................... 140
3.43 “UH” Malfunction of System,
Refrigerant System Address Undefined............................................... 141